Disease Areas
Disease is defined as a series of alterations, signs, and symptoms that manifest in a similar way in different individuals in response to a specific cause, allowing for classification and identification of disorders. Cancer is defined as a complex disease characterized by the uncontrollable division of body cells, which often results from cellular abnormalities due to gene mutations or the production of abnormal proteins. It represents a failure of cell cycle control and involves the spread of these abnormal cells to surrounding tissues. Immune diseases include multiple sclerosis, rheumatoid arthritis, psoriasis, ulcerative colitis, Crohn’s disease, systemic lupus erythematosus (SLE), asthma, allergies, and chronic obstructive pulmonary disease (COPD). These are autoimmune diseases. Cardiovascular disease (CVD) defines a group of disorders, which affect the cardiac, cerebrovascular, or peripheral vascular systems of the body. Understanding disease classification is crucial for scientific research because it can standardize practices, facilitate communication, guide research directions, and advance precision medicine.
References:
- [1]. Webster AJ, et, al. Characterisation, identification, clustering, and classification of disease. Sci Rep. 2021 Mar 8;11(1):5405. [Content Brief]
- [2]. Brown JS, et, al. Updating the Definition of Cancer. Mol Cancer Res. 2023 Nov 1;21(11):1142-1147. [Content Brief]
- [3]. Mpakosi A, et, al. Autoimmune Diseases Following Environmental Disasters: A Narrative Review of the Literature. Healthcare (Basel). 2024 Sep 4;12(17):1767. [Content Brief]
Cancer
Cancer is a disease in which some of the body’s cells grow uncontrollably and spread to other parts of the body. Cancer can start almost anywhere in the human body. The genetic changes that contribute to cancer tend to affect three main types of genes-proto-oncogenes, tumor suppressor genes, and DNA repair genes.
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Lung Cancer (3948)
Lung cancer is the most common cause of cancer-related death worldwide, characterized by uncontrolled growth of cells in the lungs that can form tumors and spread to other body parts. It predominantly affects men more than women and is strongly linked to smoking, which accounts for 80–90% of cases, although non-smokers can also develop the disease. The two main types are non-small cell lung cancer (NSCLC), including adenocarcinoma, squamous cell carcinoma, and large cell carcinoma, and small cell lung cancer (SCLC), which tends to grow and spread rapidly. Risk factors include exposure to tobacco smoke, radon gas, asbestos, and other carcinogens. Early-stage lung cancer often presents no symptoms, but later signs may include persistent cough, coughing up blood, shortness of breath, chest pain, and unexplained weight loss. Diagnosis relies on imaging techniques such as X-rays, CT scans, and PET scans, along with biopsy confirmation. Treatment options vary by stage and type and typically involve surgery, chemotherapy, radiation therapy, or targeted therapies. Prognosis remains poor overall, especially for advanced or late-diagnosed cases, underscoring the importance of early detection through screening. Genetic factors such as mutations in the BRAF gene and involvement of pathways like innate immunity and infectious disease contribute to its pathogenesis. Lung cancer has significant geographical variation in mortality, largely reflecting differences in smoking prevalence, and continues to be a major focus of research, clinical trials, and public health efforts.
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Breast Cancer (4869)
Breast cancer is a heterogeneous malignancy originating from breast epithelial tissue, characterized by uncontrolled growth of abnormal cells that can form tumors and potentially spread to other parts of the body. It primarily affects women but can also occur in men. The disease arises in either the milk ducts (ductal carcinoma) or lobules (lobular carcinoma), with invasive forms spreading beyond the original site. Key risk factors include age, family history, and genetic mutations such as BRCA1 and BRCA2. Common symptoms include a new lump or thickening in the breast or armpit, changes in breast size or shape, skin dimpling, and nipple abnormalities. Early detection through screening methods like mammography significantly improves outcomes, with a 5-year survival rate of approximately 91% in the U.S. Overall, breast cancer remains the second most common cancer in women, emphasizing the importance of awareness, prevention, and timely medical intervention.
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Colorectal Cancer (3065)
Colorectal cancer is the third most common malignancy in the United Kingdom, with around 34,000 new cases diagnosed annually, and exhibits a 5-year survival rate between 63% and 73%. It arises from abnormal cell growth in the colon or rectum, most commonly as adenocarcinoma, and often develops from precancerous polyps. The liver is the most frequent site of recurrence after curative surgery. Risk factors include age over 45, genetic predisposition, lifestyle factors, and inflammatory bowel disease. Early-stage disease may be asymptomatic, but symptoms such as altered bowel habits, blood in stool, abdominal pain, and unexplained weight loss may occur as it progresses. Screening methods like colonoscopy are vital for early detection and prevention. The disease is characterized by molecular alterations including chromosomal instability, and treatment strategies vary by stage, ranging from surgery for early cases to systemic therapies for advanced disease. Colorectal cancer remains one of the most prevalent cancers globally, underscoring the importance of awareness, screening, and timely intervention.
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Prostate Cancer (3398)
Prostate cancer is the most common cancer and the second leading cause of cancer-related death among men in the United States, characterized by malignant growth of glandular cells in the prostate gland, typically presenting as adenocarcinoma originating in the peripheral zone. It often progresses slowly but can be aggressive, with potential to spread locally or metastasize to bones, lymph nodes, lungs, liver, or brain. Risk factors include age (most cases occur in men over 50), race (African American men have higher incidence and mortality), family history, and genetic predisposition, with 5–10% of cases being hereditary. The disease may remain asymptomatic in early stages, but symptoms can include urinary difficulties, frequent urination, blood in urine, erectile dysfunction, and bone pain. Diagnosis relies on prostate-specific antigen (PSA) screening, digital rectal examination, and confirmatory biopsy with Gleason scoring for grading. Staging classifies the disease as localized (confined to the prostate), locally advanced (spread beyond the prostate but not distant), or metastatic (distant spread). Early detection remains crucial, although treatment decisions are influenced by the cancer’s aggressiveness and individual risk profile. Lifestyle factors such as diet and physical activity may modulate risk, and while many cases are indolent and may not require immediate intervention, appropriate management based on histopathological findings and staging is essential for optimal outcomes.
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Gastric Cancer (1154)
Gastric cancer is a malignant tumor arising from the stomach lining, predominantly as adenocarcinoma, classified into diffuse and intestinal histological types, with the former being poorly differentiated and the latter often exophytic and linked to intestinal metaplasia. It may spread locally or metastasize systemically, presenting with nonspecific symptoms such as abdominal pain, heartburn, nausea, and weight loss. Key risk factors include Helicobacter pylori infection, chronic gastritis, male gender, dietary habits, and smoking. Early diagnosis remains difficult due to overlapping symptoms with benign conditions, but treatment typically involves surgical resection combined with chemotherapy and/or radiation therapy.
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Liver Cancer (2870)
Liver cancer, also known as hepatocellular carcinoma (HCC), is a malignant tumor that originates in the liver, either as a primary cancer arising within the liver or as secondary cancer resulting from metastasis from other organs. It is a life-threatening condition and one of the fastest-growing cancer types in the United States, with HCC accounting for over 12,000 deaths annually. Common symptoms include loss of appetite, weakness, bloating, jaundice, and upper abdominal discomfort, though these are often non-specific. Major risk factors include chronic hepatitis infection, cirrhosis, exposure to toxins like aflatoxins, family history, obesity, and diabetes. Treatment options depend on the stage and severity of the disease and may involve surgery, chemotherapy, radiation therapy, or a combination of these approaches.
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Thyroid Cancer (35)
Thyroid cancer is a malignancy that originates in the thyroid gland, a butterfly-shaped endocrine organ located in the neck responsible for producing hormones that regulate metabolism, heart rate, blood pressure, and body temperature. It is classified into several types, with papillary thyroid cancer being the most common, accounting for 80–85% of cases, followed by follicular (10–15%), medullary (MTC), and anaplastic thyroid cancers, which are less common but more aggressive. Risk factors include age over 60, family history of thyroid or other cancers, and prior exposure to radiation, particularly during childhood. Symptoms often include a painless neck lump, difficulty swallowing, trouble breathing, and voice changes such as hoarseness, although many cases are asymptomatic and discovered incidentally. Diagnosis typically involves ultrasound imaging, fine-needle aspiration biopsy, and sometimes CT or MRI scans. Treatment usually consists of surgical removal of the thyroid (thyroidectomy) and affected lymph nodes, followed by radioactive iodine therapy in certain cases, with additional options like targeted therapy or chemotherapy for advanced or resistant disease. Early detection generally leads to a favorable prognosis, with high survival rates for most types, especially papillary and follicular thyroid cancers.
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Cervical Cancer (226)
Cervical cancer is a malignant tumor originating in the cervix, primarily caused by persistent infection with high-risk types of human papillomavirus (HPV), which accounts for nearly 99% of cases. It predominantly affects women in low- and middle-income countries due to limited access to prevention and screening. The disease typically begins as dysplastic or premalignant lesions at the squamocolumnar junction and progresses slowly to invasive carcinoma. The two main histological types are squamous cell carcinoma (up to 90% of cases) and adenocarcinoma, with some tumors exhibiting features of both, known as mixed or adenosquamous carcinoma. Early stages often present no symptoms, but advanced disease may cause abnormal vaginal bleeding, pelvic pain, dyspareunia, or urinary difficulties. Diagnosis relies on screening methods such as the Pap test and HPV testing, with colposcopy used for further evaluation. The HPV vaccine plays a critical role in prevention by targeting oncogenic HPV strains, while regular screening enables early detection and effective treatment, significantly reducing mortality.
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Bladder Cancer (92)
Bladder cancer is a common malignancy originating in the urinary bladder's lining, with high incidence rates in regions such as Australia, New Zealand, and Europe, significantly influenced by smoking. It is categorized into non-muscle invasive (superficial) and muscle-invasive types, depending on tumor depth. The most prevalent form is transitional cell carcinoma, with squamous cell carcinoma and adenocarcinoma also occurring, particularly in areas affected by schistosomiasis. Key risk factors include smoking, chemical exposure, family history, age, gender, and chronic bladder inflammation. Clinical manifestations often involve hematuria, dysuria, urinary frequency, urgency, and abdominal or back pain. If untreated, the disease may metastasize to lymph nodes, bones, lungs, or liver. Treatment strategies encompass surgery, chemotherapy, radiation therapy, and immunotherapy, with early detection playing a crucial role in improving outcomes. Specialized nursing care in urology and oncology is essential for managing this condition effectively.
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Leukemia/Lymphoma/Myeloma (4824)
Leukemia is a type of blood cancer characterized by the uncontrolled proliferation of white blood cells, resulting in suppression of normal blood cells and platelets, which can lead to life-threatening complications. It is classified into acute or chronic forms and further subdivided into myeloid and lymphoid types. Lymphoma is a group of cancers that originate from lymphocytes, a type of white blood cell, primarily affecting the lymph nodes and other lymphoid tissues, and is broadly categorized into Hodgkin lymphoma and non-Hodgkin lymphoma. Multiple myeloma is a malignancy of plasma cells, a type of white blood cell responsible for antibody production, leading to bone destruction, kidney impairment, anemia, and immune dysfunction. Lymphoma is a malignancy originating from lymphocytes, characterized by abnormal accumulation of these cells in lymphoid tissues or other organs, often due to dysregulated apoptosis caused by overexpression of anti-apoptotic proteins such as Bcl-2. It arises from the proliferation of lymphoreticular cells, primarily involving lymphoid tissues but potentially affecting almost any organ system. Subtypes include high-, medium-, and low-grade lymphomas, lymphoblastic or lymphocytic lymphoma, mycosis fungoides (a cutaneous T-cell lymphoma), and MALT lymphoma (gastric mucosa-associated lymphoid tissue lymphoma). In ferrets, lymphoma manifests differently based on age: aggressive lymphoblastic lymphoma is common in juveniles (<2 years), frequently presenting with mediastinal masses, while older ferrets (>2 years) typically develop indolent lymphocytic lymphoma, often in multicentric or gastrointestinal forms. Leukemia, a broader category of blood cell cancers, is classified by the type of affected blood cell and its rate of progression—acute or chronic—and is most prevalent in adults over 55, though it remains the most common cancer in children under 15. Multiple myeloma is a malignant plasma cell disorder characterized by clonal proliferation of abnormal plasma cells in the bone marrow, leading to skeletal destruction, renal impairment, immunosuppression, and anemia. It arises from the progression of monoclonal gammopathy of undetermined significance (MGUS) and exhibits significant biological and clinical heterogeneity. The disease pathogenesis involves a vicious cycle between myeloma cells and the bone microenvironment, where malignant plasma cells stimulate osteoclast activation and suppress osteoblast function, resulting in lytic bone lesions that further promote tumor growth. Advances in therapy have improved outcomes, emphasizing the need for sensitive diagnostic tools to identify patients who will benefit from early intervention.
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Pancreatic Cancer (3792)
Pancreatic cancer is a highly lethal malignancy, predominantly composed of pancreatic ductal adenocarcinoma, which accounts for 80–90% of cases and is characterized by insidious onset, rapid progression, and a low rate of early diagnosis, resulting in poor treatment outcomes. It originates from abnormal cell growth in the pancreas, a gland located between the stomach and spine, with the exocrine type being more common and typically diagnosed at an advanced stage, while neuroendocrine tumors (islet cell tumors) are less frequent but associated with a better prognosis. Risk factors include age (most commonly diagnosed in individuals aged 65–74), type 1 and type 2 diabetes, and other unknown genetic or environmental influences. Symptoms such as jaundice, nausea, bloating, fatigue, and loss of appetite often appear late in the disease course. Treatment options include surgery, chemotherapy, and radiation therapy, yet the overall 5-year survival rate remains low, ranging from 5% to 15% in the United States.
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Melanoma (430)
Melanoma is the most serious and aggressive form of skin cancer. It develops in melanocytes (the cells that produce pigment or melanin, which gives skin its color). While it typically originates in the skin, it can also form in the eyes, mucous membranes, or other areas.
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Ovarian Cancer (2734)
Ovarian cancer is a malignant tumor arising from uncontrolled growth of abnormal cells in the ovaries, fallopian tubes, or peritoneum, with epithelial ovarian cancer being the most common subtype accounting for over 95% of cases. It often presents at an advanced stage due to nonspecific symptoms such as pelvic or abdominal pain, bloating, changes in bowel or bladder habits, early satiety, and abnormal vaginal bleeding, particularly in postmenopausal women. The disease may spread within the peritoneal cavity and to distant organs, leading to significant morbidity and mortality. Genetic predisposition, including mutations in BRCA1 and BRCA2 genes, plays a key role in hereditary cases. Although rare, other types include germ cell, sex-cord stromal, and low malignant potential tumors. Due to the lack of effective screening tools and late symptom onset, early detection remains a major challenge, making timely diagnosis critical for improving survival outcomes.
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Glioma (310)
Gliomas are primary brain tumors arising from glial cells, the supportive cells of the central nervous system, and represent the most common type of malignant brain tumor, accounting for approximately 30% of all brain tumors and 80% of malignant ones. Classified by histological grade, gliomas range from low-grade (grade I–II) slow-growing tumors such as pilocytic astrocytomas to highly aggressive grade IV glioblastomas. They commonly occur in the frontal, temporal, parietal, and occipital lobes and can be well-circumscribed or diffusely infiltrative. Genetic alterations, particularly in IDH genes, play a key role in their pathogenesis and metabolic reprogramming, including increased glutamine synthesis. Symptoms result from mass effect and neurological dysfunction, manifesting as headaches, seizures, cognitive decline, and motor or sensory deficits. Treatment typically involves surgical resection followed by radiation and chemotherapy, though outcomes vary significantly with tumor grade, with higher grades associated with poorer prognosis. Brainstem gliomas, such as diffuse intrinsic pontine gliomas (DIPGs), are particularly challenging due to their inoperable location. Despite advances, gliomas remain difficult to treat, underscoring the need for continued research into targeted therapies and improved diagnostic and prognostic markers.
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Neuroblastoma (55)
Neuroblastoma is a type of cancer that develops from immature nerve cells (neuroblasts) found in several areas of the body. It most frequently arises from the adrenal medulla or along the paravertebral sympathetic chain. During embryogenesis, neural crest cells migrate from the dorsal neural tube, undergoing epithelial-to-mesenchymal transition before differentiating into components of the sympathetic nervous system and adrenal medulla. A subset of Schwann cell precursors—often referred to as “bridge cells”—can differentiate either into chromaffin cells or into sympathoadrenal neuroblasts, which continue their maturation postnatally.
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Osteosarcoma (35)
Osteosarcoma is a cancerous tumor in a bone. Osteosarcoma is an aggressive malignant neoplasm that arises from primitive transformed cells of mesenchymal origin (and thus a sarcoma) and that exhibits osteoblastic differentiation and produces malignant osteoid. Osteosarcoma can start in any bone. It's most often found in the long bones of the legs, and sometimes the arms. Very rarely, it happens in soft tissue outside the bone. It typically occurs during periods of rapid bone growth.
Infection
An infection is the invasion of tissues by pathogens, their multiplication, and the reaction of host tissues to the infectious agent and the toxins they produce. Infections can be caused by a wide range of pathogens, most prominently bacteria and viruses.
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Viral Infection (1897)
Experimental viral infection involves studying viral pathogenesis in controlled environments, typically using animal models, to assess how factors like malnutrition influence viral replication, disease severity, and immune responses. Immunodeficiency-65 (IMD65) is an autosomal recessive disorder marked by severe viral infections beginning in infancy, leading to recurrent pneumonia, bronchiectasis, and septic shock due to defective type I interferon signaling. Key laboratory features include lymphopenia, hypogammaglobulinemia, and impaired antiviral immunity. Intravenous immunoglobulin therapy provides clinical benefit, while live attenuated vaccines are contraindicated due to the risk of vaccine-strain dissemination in patients with compromised interferon responses.- Adenovirus Infection (14)
- Cytomegalovirus Infection (46)
- Flavivirus Infection (21)
- HPV Infection (8)
- HSV Infection (59)
- Influenza Virus Infection (88)
- Measles Virus Infection (5)
- Orthopoxvirus Infection (42)
- Rabies Virus Infection (3)
- Respiratory Syncytial Virus Infection (28)
- Tobacco Mosaic Virus Infection (8)
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Coronavirus Infection (1782)
Coronavirus infection, encompassing diseases such as COVID-19 and long COVID, represents a significant global public health challenge driven by the novel coronavirus, requiring coordinated prevention and control strategies. Key genetic factors include the CBS gene, involved in metabolic pathways and immune regulation, with associated biological processes including cytokine signaling in the immune system and Toll-like receptor signaling. Antiviral agents like Ritonavir and Lopinavir have been utilized in treatment approaches. The condition affects multiple organ systems, with involvement of tissues such as the spinal cord and kidney, and is linked to phenotypes related to homeostasis, metabolism, and nervous system dysfunction.
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HIV Infection (231)
Acute HIV infection is a self-limited phase occurring within the first few weeks after initial exposure to the human immunodeficiency virus (HIV), marked by rapid viral replication, high viral loads, and nonspecific symptoms such as fever, rash, and lymphadenopathy. This stage may last from days to over 10 weeks, during which the immune system begins to mount a response. Early diagnosis is critical for initiating timely treatment and reducing transmission risk. HIV infection is associated with acquired immunodeficiency syndrome (AIDS) and has links to other infectious diseases like syphilis. The CCR5 gene plays a key role in HIV pathogenesis, and related biological pathways include the Innate Immune System and ERK Signaling. Drugs such as Candesartan cilexetil and Lercanidipine have been studied in this context. Affected tissues include T cells and breast tissue, with associated phenotypes involving cellular dysfunction and neoplastic changes.
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Hepatitis Virus Infection (435)
Viral Hepatitis, also known as hepatitis virus infection, is a liver disorder caused by various hepatitis viruses, including hepatitis A and D. It is associated with the GPT gene involved in liver function and linked to key biological pathways such as NF-kappaB signaling and regulation of insulin-like growth factor (IGF) transport and uptake by IGFBPs. Treatment options include Peginterferon alfa-2b and Ribavirin. The condition primarily affects the liver and bone marrow, with phenotypic manifestations including reduced mammosphere formation and disruptions in homeostasis and metabolism.
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Bacterial Infection (3592)
Bacterial infections are caused by bacteria that typically arise from colonized sites in the patient, often following breach of local defense mechanisms, especially at mucosal injury sites, presenting with fever, flu-like symptoms, and localized inflammation; diagnosis relies on cultures and imaging. Pulmonary non-tuberculous mycobacterial (NTM) infection is a rare bacterial condition caused by environmental mycobacteria such as Mycobacterium avium complex, Mycobacterium kansasii, or Mycobacterium xenopi, leading to chronic respiratory symptoms including persistent cough, chest pain, hemoptysis, dyspnea, fatigue, fever, night sweats, and weight loss; risk factors include preexisting lung disease, malignancy, immunosuppression, or structural thoracic abnormalities, with individuals having compromised immunity or underlying health conditions being more susceptible due to exposure to mycobacteria in soil and water.- Streptococcus Pneumoniae Infection (24)
- Streptococcus Pyogenes Infection (8)
- Staphylococcus Aureus Infection (292)
- Escherichia Coli Infection (196)
- Mycobacterium Tuberculosis Infection (294)
- Clostridium Difficile Infection (34)
- Bacillus Subtilis Infection (37)
- Pseudomonas Aeruginosa Infection (115)
- Klebsiella Pneumoniae Infection (34)
- Haemophilus Influenza Infection (6)
- Salmonella Infection (25)
- Shigella Infection (3)
- Listeria Monocytogenes Infection (6)
- Legionella Infection (9)
- Vibrio Cholerae Infection (8)
- Helicobacter Pylori Infection (36)
- Mycoplasma Infection (20)
- Chlamydia Infection (24)
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Fungal Infection (986)
Fungal Infection - Immunodeficiency is a rare autosomal recessive primary immunodeficiency disorder characterized by profound susceptibility to fungal infections, particularly due to Candida species. Patients exhibit recurrent mucocutaneous candidiasis, systemic candidiasis with meningoencephalitis, and deep dermatophytosis involving skin, hair, nails, lymph nodes, and the central nervous system. Clinical manifestations include erythematosquamous skin lesions, subcutaneous nodules or ulcerative infiltrations, severe onychomycosis, and lymphadenopathy. The condition results from impaired immune responses and defective clearance of Candida albicans, leading to persistent or recurrent infections. Associated genes include CBS (Cystathionine Beta-Synthase), involved in pathways such as Innate Immune System and ERK Signaling. Related conditions encompass lobomycosis and subcutaneous mycosis. Affected tissues include skin and T cells, with phenotypic features including increased shRNA abundance (Z-score > 2) and disturbances in homeostasis and metabolism. Therapeutic agents such as Methoxsalen and Caspofungin have been implicated in management strategies.
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Parasitic Infection (1026)
Parasitic infection involves the invasion and replication of parasites within a host, necessitating specialized diagnostic approaches using different biofluids; diagnosis can be challenging due to limited sensitivity and specificity, especially during low-intensity infections.
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Plant Infection (187)
Plant infection occurs when environmental factors compromise a plant's physiological processes, leading to structural, growth, or functional disruptions. In recent years, bacterial, fungal, and viral infections have increasingly contributed to plant diseases, affecting crops at various stages of agricultural production. Under favorable conditions, disease prevalence can reach 70–80% of the plant population, resulting in yield losses of up to 80–98%. Although plants possess innate cellular immunity, certain phytopathogens can evade this defense mechanism, enabling successful infection and disease progression.
Neurological, Eye or Ear Disease
Neurological disorders are conditions that target how your nervous system (brain, spinal cord and nerves) functions. There are hundreds of neurological disorders like Alzheimer’s disease, multiple sclerosis and meningitis, for example. They cause symptoms that affect how you move, think and feel.
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Neurodegenerative Disease (4402)
Neurodegenerative diseases are a group of disorders characterized by the progressive loss of specific neuronal populations due to mechanisms including proteotoxic stress, oxidative stress, neuroinflammation, and apoptosis, ultimately resulting in neuronal dysfunction and death. These conditions exhibit distinct clinical presentations and anatomical patterns of degeneration, such as Alzheimer’s disease, Parkinson’s disease, frontotemporal degenerations, extrapyramidal disorders, and spinocerebellar ataxias. They can be classified based on primary clinical features, anatomical distribution of pathology, or underlying protein abnormalities—such as amyloidoses, tauopathies, α-synucleinopathies, and TDP-43 proteinopathies. While some patients present with pure syndromes, others display mixed features, reflecting the complex and heterogeneous nature of these disorders.
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Cerebrovascular Disease (229)
Cerebrovascular disease refers to a group of conditions that affect the blood vessels supplying the brain, leading to impaired blood flow and potential damage to brain tissue. This includes ischemic stroke, caused by blockage of blood vessels, and hemorrhagic stroke, resulting from bleeding in or around the brain. These conditions are major components of cardiovascular diseases (CVDs), which also encompass hypertension, heart attack, and other disorders related to the heart and circulatory system. Cerebrovascular diseases are significant causes of disability and mortality worldwide, often linked to shared risk factors such as high blood pressure, diabetes, smoking, obesity, and atherosclerosis. Early detection, management of risk factors, and prompt treatment are crucial in reducing the incidence and severity of these conditions.
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Schizophrenia (149)
Schizophrenia is a severe and chronic mental disorder characterized by persistent or recurrent episodes of psychosis, including hallucinations, delusions, disorganized thinking and behavior, and negative symptoms such as social withdrawal and flattened affect. It typically emerges in early adulthood and is associated with significant impairment in daily functioning, cognitive deficits, and reduced quality of life. The disorder has a lifetime prevalence of approximately 1%, is highly heritable but genetically complex, and involves disruptions in brain function affecting perception, thought, and emotion regulation. While distinct from mood disorders and dementias, schizophrenia can co-occur with mood symptoms, leading to a schizoaffective disorder diagnosis in some cases. Core symptoms must persist for at least one month for diagnosis, with continuous or relapsing course lasting at least six months. Treatment includes antipsychotic medication, psychotherapy, family education, rehabilitation, and skills training. Genetic factors, such as variants in the MTHFR gene, and neurobiological pathways involving neurotransmitter systems and brain regions like the prefrontal cortex are implicated. Additional features may include sleep disturbances, photophobia, personality changes, EEG abnormalities, and movement problems.
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Depression (2650)
Mood disorders affect ~20% of the American population over their lifetime and yearly prevalence rates are close to 10%, including 6.7% for major depressive disorder (MDD). Moreover, depression is the leading cause of disability worldwide. MDD is characterized by symptoms of emotional, motivational, cognitive and physiological domains making it a complex disease to treat. Furthermore, depression is often associated with chronic illnesses or other mood disorders such as co-morbid anxiety, all of which can be predictors of poor response to antidepressant treatments. In fact, it is estimated that only 50% of depressed patients are responsive to currently available antidepressant treatments. Modeling human depression in animals is challenging considering the subjective nature of the multiple psychological and physiological symptoms and the lack of objective biomarkers. Validity of an animal model is generally evaluated with the following criteria: 1) manifestation of symptoms are reasonably analogous to the human disorder, 2) behavioral changes can be monitored objectively and 3) behavior changes can be reversed with therapeutically effective antidepressant treatments.
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Epilepsy (208)
Epilepsy is a neurological disorder characterized by recurrent, unprovoked seizures due to abnormal electrical activity in the brain, with symptoms ranging from brief lapses in awareness to convulsions. It is typically diagnosed after two or more seizures occurring more than 24 hours apart, or after a single seizure with high recurrence risk. Causes include genetic factors, brain injury, infections, tumors, stroke, developmental disorders, and metabolic or structural abnormalities. The SCN1A gene is notably associated with epilepsy, particularly in syndromes like Dravet syndrome and juvenile myoclonic epilepsy, with related pathways involving neuroscience and neuropathic pain signaling. Treatment includes anti-seizure medications, lifestyle modifications, and surgical options, though about 30% of patients continue to experience seizures despite therapy. Epilepsy can affect individuals of any age, with involvement of brain regions such as the temporal lobe and phenotypes related to nervous system dysfunction and growth abnormalities. Associated conditions include post-traumatic epilepsy, childhood absence epilepsy, and myoclonic epilepsy, with triggers including trauma, CNS infections, and degenerative brain disorders. Zinc cation and selenium have been explored in the context of management.
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Anxiety or Fear-Related Disease (160)
Anxiety or fear-related disorders encompass conditions such as generalized anxiety disorder and separation anxiety disorder, characterized by symptoms including nervousness, agitation, and a persistent sense of tension. The SLC6A4 gene is a key genetic factor associated with these disorders, involved in serotonin transport and linked to pathways like Signal Transduction and Class A/1 (Rhodopsin-like receptors). Pharmacological agents such as Amantadine and Amlodipine have been implicated in the treatment or management of anxiety symptoms. Affected tissues include the brain and breast, with related phenotypes involving the nervous system and normal physiological function. Phobic Disorder, also known as phobic anxiety disorder, encompasses conditions such as agoraphobia and specific phobias, characterized by excessive and persistent fear of specific situations or objects. The MAOA gene is significantly associated with this disorder, which is involved in pathways including Signal Transduction and GPCR downstream signaling. Treatment options include the medications Paroxetine and Venlafaxine. The amygdala and eye are key affected tissues, with related phenotypes involving the nervous system and homeostasis/metabolism.
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Pain (3092)
Pain is a complex, multifaceted symptom arising from injury, disease, or dysfunction in the nervous system, characterized by activation of nociceptors and transmission of sensory and emotional information to the central nervous system. Pain disorders encompass persistent or recurring pain conditions that may involve physical, emotional, or psychological components, including chronic pain syndrome (CPS), psychogenic pain, and neuropathic pain. These disorders manifest through diverse symptoms such as continuous burning or throbbing pain, allodynia, hyperalgesia, swelling, and mood disturbances. Etiologies range from trauma and illness to genetic predisposition and psychological factors, with chronic pain affecting approximately 20% of adults globally and representing a major public health challenge. Classification is based on pain characteristics or anatomical location, including myofascial, musculoskeletal, fibromyalgia, and chronic headache syndromes. Pain agnosia, a rare condition involving loss of pain perception, highlights the critical role of pain in protective function. Genetic factors, such as variants in the HFE gene, are implicated in certain pain disorders, along with involvement of pathways like cardiac conduction and G-beta gamma signaling. The spinal cord and dorsal root ganglion are key affected tissues, and treatments may include medications like ibuprofen and dinoprostone. Comprehensive management requires integrated evaluation of physical, emotional, and neurological aspects.
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Neurotrophic or Neurotoxic Disease (13)
Central nervous system toxicity from local anesthetics is a biphasic process characterized initially by excitatory effects, including perioral numbness, visual disturbances, and lowered seizure threshold, progressing to depression with drowsiness, unconsciousness, and potentially coma or cardiac arrest. This toxicity is influenced by the drug's lipid solubility and protein-binding capacity, with symptoms arising from disruption of inhibitory neuronal activity. Early signs such as paresthesia and visual changes warrant immediate cessation of the procedure and preparation for potential seizures, managed with 100% oxygen, benzodiazepines, and airway support. Cardiac toxicity typically occurs at higher systemic concentrations and is particularly concerning with bupivacaine due to its high affinity for Purkinje fibers, leading to refractory arrhythmias like ventricular fibrillation, necessitating strict avoidance of intravascular injection. Neurotrophic factors are essential for neuronal growth, survival, and differentiation, supporting neural network formation and embryonic development, though they are not directly related to anesthetic toxicity.
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CNS Infection (212)
Central nervous system infections involve pathogens affecting the brain and spinal cord, presenting as encephalitis, meningitis, or brain abscesses, with increased risk in neutropenic patients and those with cerebrospinal fluid shunt implants.
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CNS Neoplasm (308)
Neoplasms of the central nervous system (CNS) comprise a diverse group of benign and malignant tumors, with significant advances in understanding their molecular underpinnings offering promise for improved outcomes. Despite these advances, prognosis remains poor for the most aggressive form, glioblastoma multiforme (GBM), particularly in older adults, where median survival rarely exceeds one year. In contrast, pediatric tumors like medulloblastoma have seen improved survival through risk stratification and refined treatments. Continued research in both preclinical and clinical settings is essential to achieve long-term control and potential cures. The integration of multidisciplinary care and close collaboration between clinicians and tumor biologists is strengthening the outlook for neuro-oncology, making the future increasingly hopeful.
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Nervous System Injury (61)
Injuries to the nervous system, including peripheral nerve injury (PNI) and central nervous system (CNS) injury, result from explosive blasts and can cause immediate or delayed mortality. Clinical manifestations often involve headache, vertigo, seizures, and altered mental status, with posttraumatic stress disorder commonly occurring in affected individuals.
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Attention Deficit Hyperactivity Disorder (5)
Attention Deficit Hyperactivity Disorder (ADHD) is a neurodevelopmental disorder characterized by persistent symptoms of inattention, hyperactivity, and impulsivity that interfere with functioning or development. It commonly manifests in childhood and can continue into adulthood, affecting attention span, organization, task completion, and impulse control. Symptoms include difficulty sustaining focus, making careless mistakes, avoiding mentally demanding tasks, fidgeting, restlessness, excessive talking, interrupting others, and acting without considering consequences. ADHD is categorized into three subtypes: Predominantly Inattentive Type, Predominantly Hyperactive-Impulsive Type, and Combined Type. Genetic factors play a significant role, with evidence of altered brain structure and function, particularly in regions related to executive function such as the prefrontal cortex. The DRD4 gene is associated with ADHD, and pathways involving dopamine signaling and neurotransmitter regulation are implicated. Treatments may include medications like methylphenidate and behavioral interventions, with some drugs such as ziprasidone and topiramate being explored in clinical contexts. ADHD is also linked to other conditions such as autism spectrum disorder and Tourette syndrome.
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Behavioral Addiction (24)
Addictive behaviors encompass a range of disorders characterized by impaired control over substance use or compulsive engagement in rewarding activities despite harm, including drug dependence, compulsive overeating, gambling, and shopping. These behaviors are classified as chronic, relapsing brain disorders influenced by genetic, psychosocial, and environmental factors, with diagnostic criteria outlined in the DSM-5. Neurobiological evidence demonstrates that excessive consumption of food or engagement in behavioral addictions induces similar neuroadaptations in the brain's reward circuitry as drug abuse, implicating shared neural mechanisms. Imaging studies consistently reveal disrupted reward system function across various addictive behaviors, supporting their classification under a unified model of addiction. As such, addictive behaviors represent significant public health challenges due to their persistent, relapsing nature and severe health consequences.
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Sleep-Wake Disorder (44)
Parasomnias are potentially dangerous or harmful behaviors occurring during sleep-wake transitions, encompassing disorders like somnambulism, sleep terrors, nightmares, and REM sleep behavior disorder, and are categorized into REM-related, NREM-related, and other types.
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Visual System Disease (193)
Diseases of the visual system encompass a wide range of conditions affecting the eyes, visual pathways, and brain regions involved in vision. Common disorders include refractive errors such as myopia, hyperopia, and astigmatism, as well as cataracts, glaucoma, and age-related macular degeneration (AMD). Diabetic eye disease and amblyopia (lazy eye) are also prevalent. These conditions may arise from infectious agents, systemic diseases like diabetes and hypertension, ocular trauma, or neuro-ophthalmic disorders linked to neurological conditions such as Alzheimer’s disease, multiple sclerosis, and optic neuritis.
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Ear Disease (16)
Ear diseases can lead to chronic and severe complications such as recurrent infections, progressive hearing impairment, vertigo, and facial nerve dysfunction including paralysis or weakness.
Inflammation or Immune System Disease
Inflammation and immune system diseases involve dysregulation of the body's immune responses, leading to excessive or inappropriate activation of immune defenses. These conditions can result from autoimmune disorders, where the immune system attacks self-tissues, or chronic inflammatory states that cause tissue damage and dysfunction.
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Autoimmune Disease (2706)
Autoimmune diseases are a group of disorders characterized by a loss of immune tolerance, leading the immune system to attack the body's own tissues through autoreactive T cells and autoantibodies, causing inflammation and damage. They can be classified as organ-specific or systemic, affect around 5% of the global population—with higher incidence in women of reproductive age—and encompass over 80 distinct conditions that target various organs and systems, including the skin, liver, pancreas, and joints.- Systemic Lupus Erythematosus (77)
- Experimental Autoimmune Encephalomyelitis (161)
- Type 1 Diabetes (112)
- Rheumatoid Arthritis (1705)
- Myasthenia gravis (14)
- Ulcerative Colitis (74)
- Multiple Sclerosis (82)
- Crohn's Disease (36)
- Psoriasis (109)
- Graves’ Disease (6)
- Inflammatory Bowel Disease (65)
- Celiac Disease (5)
- Experimental Autoimmune Encephalomyelitis (158)
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Immunodeficiency Disease (22)
Immunodeficiency disorders predispose individuals to infections due to defects in immune system components, including lymphocytes, granulocytes, monocytes, antibodies, or complement proteins, resulting from genetic abnormalities (primary) or acquired conditions (secondary). The hallmark of these disorders is increased susceptibility to infections characterized by recurrent episodes, severe or prolonged courses, unusual pathogens, or atypical manifestations. B-cell deficiencies primarily lead to recurrent infections with encapsulated bacteria, while T-cell deficiencies are associated with recurrent viral, fungal, or protozoal infections. Phagocytic cell defects result in recurrent bacterial infections due to impaired pathogen engulfment and destruction, and complement deficiencies disrupt the activation of classical, alternative, or lectin pathways, compromising innate and adaptive immune defenses.
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Allergy (287)
Allergy is characterized by an inappropriate immune response to harmless food antigens, with genetic factors playing a significant role through inherited susceptibility variants identified via GWAS and rare monogenic disorders linked to allergic diseases.
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Cancer Immunology (66)
Tumor-associated immunosuppression is a key mechanism by which tumors evade immune surveillance, involving a network of immunosuppressive cells—including regulatory T cells (Tregs), tumor-associated macrophages (TAMs), and myeloid-derived suppressor cells (MDSCs)—and inhibitory factors that collectively promote immune tolerance and support tumor progression. Cancer immunology, as the study of the complex interplay between the immune system and cancer, aims to elucidate the immune system's role in tumor development and to develop effective immune-based therapies.
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Vaccine and Immunization (13)
A vaccine is an inactivated or attenuated form of a pathogen, such as a virus or bacteria, designed to stimulate the body's immune system to recognize and combat the actual infectious agent upon future exposure. By introducing a harmless component of the microorganism, vaccines trigger the production of specific antibodies and memory cells, enabling a rapid and effective immune response if the individual encounters the real pathogen. This immunological memory provides long-term protection against serious and potentially life-threatening diseases including polio, influenza, measles, tetanus, diphtheria, pertussis, meningitis, typhoid, cervical cancer, and smallpox. As emphasized by the World Health Organization, vaccines are among the safest and most effective public health tools, playing a vital role in preventing disease outbreaks and safeguarding global health.
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Immunomodulation (33)
Immunosuppression involves the deliberate reduction of immune system activity to prevent graft rejection in transplant patients, manage autoimmune diseases, or enable successful engraftment in allogeneic stem cell transplantation. It is primarily achieved through pharmacological agents that inhibit lymphocyte proliferation and activation, with combination therapies used to balance efficacy and minimize adverse effects. This strategy is particularly crucial in sensitized individuals or pediatric patients with heightened rejection risk, while also accounting for natural immunosuppressive mechanisms within the immune system itself.
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Skin Inflammation (248)
Dermatitis is a broad category of inflammatory skin disorders marked by symptoms including chronic itching, impaired skin barrier function, and reduced hydration, potentially resulting in systemic effects and associated comorbidities. It encompasses various conditions such as contact dermatitis, seborrheic dermatitis, and atopic dermatitis, all characterized by inflammation and redness of the skin.
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Pathogens Infection (102)
Bacterial infectious diseases are caused by pathogenic bacteria and encompass both opportunistic and commensal bacterial infections, with CRP (C-Reactive Protein) playing a key genetic role. These diseases are linked to pathways such as Infectious Disease and MIF Mediated Glucocorticoid Regulation, and are treatable with antibiotics including Ertapenem and Ciprofloxacin. Affected tissues include skin and lung, and associated phenotypes involve synthetic lethality with MLN4924 and increased shRNA abundance (Z-score > 2).
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Oxidative Stress and Inflammation (328)
Oxidative stress arises from an imbalance between oxidants and antioxidants, resulting in excessive reactive oxygen species (ROS) that can damage lipids, proteins, and DNA. While unavoidable in an oxygen-rich environment, moderate oxidative stress is essential for normal cellular functions by regulating redox-sensitive signaling pathways such as OxyR and SoxR in bacteria, and NF-κB and Nrf2/Keap1 in higher organisms. In contrast, excessive oxidative stress leads to molecular damage and disruption of redox homeostasis, contributing to various pathological conditions. Additionally, controlled production of oxidants by immune cells serves as a defense mechanism against pathogens.
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Chronic Disease and Inflammation (205)
Chronic inflammation is a key contributor to the development and progression of numerous chronic diseases, including cardiovascular disease, chronic kidney disease, diabetes, non-alcoholic fatty liver disease, cancer, autoimmune disorders, and neurodegenerative and mental health conditions. It not only results from these diseases but also actively participates in their underlying mechanisms, influencing both pathogenesis and potential therapeutic interventions. For instance, genetic mutations associated with clonal hematopoiesis of indeterminate potential (CHIP) enhance inflammatory gene expression, significantly increasing the risk of coronary artery disease, highlighting the central role of inflammation in chronic disease etiology.
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Respiratory Inflammation (265)
Respiratory tract inflammation is a key pathological feature of respiratory diseases such as asthma and chronic obstructive pulmonary disease (COPD), characterized by immune cell infiltration and activation—including eosinophils, mast cells, neutrophils, and lymphocytes—leading to airway hyperresponsiveness, airflow limitation, epithelial damage, bronchoconstriction, and increased airway sensitivity, often triggered by infections or environmental stimuli, with potential systemic effects contributing to comorbidities.
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Digestive System Inflammation (4065)
Gastrointestinal inflammation refers to the inflammatory response within the gastrointestinal tract, characterized by distinct immune cell activity at mucosal sites that differs from systemic immune responses, necessitating specialized study of these local immune cells.
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Genitourinary Inflammation (33)
Urogenital inflammation encompasses a spectrum of urinary tract infections, ranging from asymptomatic bacteriuria and cystitis to more severe conditions such as pyelonephritis and urosepsis.
Blood or Cardio-cerebrovascular Disease
Cardiovascular disease encompasses a broad range of conditions impacting the heart or blood vessels, including hypertension, angina, atherosclerosis, and peripheral vascular disease. There are many types of blood disorders, which can involve problems with red blood cells, white blood cells, platelets, blood vessels, bone marrow, lymph nodes, or the proteins involved in bleeding and clotting.
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Cerebrovascular Disease (229)
Cerebrovascular disease refers to a group of conditions that affect the blood vessels supplying the brain, leading to impaired blood flow and potential damage to brain tissue. This includes ischemic stroke, caused by blockage of blood vessels, and hemorrhagic stroke, resulting from bleeding in or around the brain. These conditions are major components of cardiovascular diseases (CVDs), which also encompass hypertension, heart attack, and other disorders related to the heart and circulatory system. Cerebrovascular diseases are significant causes of disability and mortality worldwide, often linked to shared risk factors such as high blood pressure, diabetes, smoking, obesity, and atherosclerosis. Early detection, management of risk factors, and prompt treatment are crucial in reducing the incidence and severity of these conditions.
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Cardiovascular Disease (2889)
Cardiovascular Disease refers to a group of conditions affecting the heart and blood vessels, including coronary heart disease and vascular abnormalities. It is associated with genetic factors such as KCNQ1, which plays a role in cardiac electrical activity, and involves pathways related to insulin-like growth factor regulation and mesenchymal stem cell differentiation. Drugs like Dimethyl fumarate and Desflurane have been implicated in its management or pathophysiology. Key affected tissues include the heart and endothelial cells, with clinical manifestations involving disturbances in homeostasis, metabolism, and muscle function.
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Blood Disease (4492)
Blood disorders encompass a variety of conditions affecting blood components such as hemoglobin, platelets, and clotting factors, leading to complications like anemia, excessive bleeding, or abnormal clot formation. These disorders can range from mild to severe and may significantly impact overall health and organ function.
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Heart Disease (390)
Heart disease, also known as cardiovascular disease (CVD), is a broad term encompassing various conditions that affect the heart's structure or function. It includes blood vessel diseases such as coronary artery disease (CAD), arrhythmias (irregular heartbeats), and heart failure, where the heart cannot pump sufficient blood to meet the body’s needs. Common causes and risk factors include high blood pressure, smoking, atherosclerosis (fatty buildup in arteries), high cholesterol, diabetes, obesity, and physical inactivity. Congenital heart defects, present at birth, are another form of heart disease. Symptoms may include chest pain, shortness of breath, palpitations, fatigue, and rapid breathing. As the leading cause of death in the United States, heart disease can be prevented and managed through lifestyle modifications, medications, and medical interventions such as surgery. Early detection and treatment are crucial for improving outcomes and reducing complications.
Metabolic or Endocrine Disease
Metabolic diseases occur when the body's usual metabolic processes are disrupted.Endocrine diseases are noncommunicable disorders caused by hormonal imbalances due to overproduction or underproduction of hormones by endocrine glands.
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Glucose Metabolism (1763)
Glucose metabolism is a vital biochemical process in cardiomyocytes that involves the uptake, utilization, and storage of glucose to generate energy, primarily through glycolysis, glycogen synthesis, glycogenolysis, and the pentose phosphate pathway. During myocardial ischemia, reduced oxygen supply forces cardiomyocytes to rely on anaerobic glycolysis for ATP production, leading to impaired function. Upon reperfusion, restored oxygen and nutrient delivery facilitates the recovery of normal glucose metabolism, which is essential for energy replenishment. However, excessive glucose during reperfusion can cause metabolite accumulation and inadequate energy supply, contributing to exacerbated myocardial ischemia-reperfusion injury. This complex interplay of metabolic pathways ensures cellular energy homeostasis and functional recovery after ischemic events.
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Lipid Metabolism (3561)
Disorders of lipid metabolism, also known as dyslipidemia, involve abnormal levels of lipids in the blood, including elevated triglycerides and low-density lipoprotein (LDL), and reduced high-density lipoprotein (HDL), leading to conditions such as pancreatitis, atherosclerosis, and coronary artery disease. These disorders arise from genetic defects in enzymes or transport proteins involved in fatty acid oxidation and lipid processing, resulting in impaired lipid metabolism and toxic accumulation of lipids in tissues like the liver, brain, and bone marrow. They are classified as inborn errors of metabolism, with some forms presenting as metabolic myopathy. Key genes implicated include LIPC, associated with hepatic lipase activity, and pathways involving lipid and cation transport. Conditions such as hyperlipoproteinemia type III and familial hypobetalipoproteinemia are linked to these disorders. Management may include enzyme replacement therapy for specific cases, while lifestyle modifications and medications like Pitavastatin and Valsartan are used to control lipid levels. Newborn screening and genetic testing play crucial roles in early detection and carrier identification.
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Amino Acid/Protein Metabolism (24)
Amino acid or protein metabolism disorders with epilepsy involve inherited metabolic defects that disrupt the normal breakdown or synthesis of amino acids or proteins, leading to the accumulation of toxic metabolites or deficiencies in essential compounds. These conditions often present with neurological symptoms, including seizures (epilepsy), developmental delay, intellectual disability, and abnormal muscle tone. Common examples include urea cycle disorders (e.g., ornithine transcarbamylase deficiency), organic acidemias (e.g., methylmalonic acidemia), and aminoacidopathies (e.g., phenylketonuria, maple syrup urine disease). Early diagnosis through newborn screening and prompt treatment—such as dietary restriction of specific amino acids, supplementation with cofactors or alternative pathways, and management of metabolic crises—are critical to preventing severe neurological damage and improving outcomes. Epilepsy in these disorders may result from neurotoxic metabolite buildup, energy deficiency in neurons, or disruption of neurotransmitter balance.
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Mineral Metabolism (159)
Mineral metabolism disorders involve abnormalities in the regulation of essential minerals such as calcium, phosphorus, and magnesium, leading to imbalances that affect bone health, hormonal function, and overall metabolic homeostasis. These disorders are characterized by defective mineralization of bone, particularly in the epiphyseal growth plate, resulting in conditions like rickets, osteoporosis, and Paget’s disease. They are frequently associated with renal dysfunction, where vitamin D deficiency, elevated fibroblast growth factor 23 (FGF-23), and altered parathyroid hormone (PTH) levels exacerbate mineral disturbances. Clinical manifestations include weak or brittle bones, abnormal bone development, muscle weakness, cramps, fatigue, and systemic complications such as fluid and electrolyte imbalances and anemia. Diagnosis relies on clinical evaluation, laboratory tests, imaging, and sometimes biopsy. Management involves dietary modifications, supplementation, pharmacological correction of mineral and hormonal imbalances, and physical therapy. Key genetic factors, such as mutations in the CASR gene, and pathways involving vitamin D receptor signaling and steroid metabolism contribute to disease pathogenesis. The kidneys and bones are primary affected tissues, underscoring the critical role of mineral homeostasis in skeletal integrity and systemic health.
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Purine Metabolism (52)
Disorder of Purine Metabolism is a group of genetic conditions characterized by abnormalities in the synthesis or degradation of purines, leading to imbalances in purine homeostasis. Key features include hyperuricemia due to excessive uric acid production, resulting from enzymatic defects such as phosphoribosylpyrophosphate synthetase superactivity or deficiency of hypoxanthine-guanine phosphoribosyltransferase (HPRT), as seen in Lesch-Nyhan syndrome. The AMPD3 gene is implicated in this disorder, affecting adenosine metabolism and contributing to metabolic disturbances. These conditions often manifest with renal complications like kidney stones, gout, and neurological symptoms including self-mutilation and developmental delay. Affected tissues primarily include the kidney and brain, reflecting systemic impacts on both metabolic and neurological functions.
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Hypothalamic-Pituitary-Adrenal Regulation (10)
Dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis, characterized by impaired negative feedback and elevated cortisol levels due to chronic stress, is strongly associated with the pathophysiology of affective disorders such as depression and anxiety.
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Thyroid Disease (44)
Thyroid disease involves disorders of the thyroid gland, rare in rabbits and rodents but more commonly observed in guinea pigs, including hyperthyroidism and thyroid neoplasms.
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Gonadal Disease (28)
Gonadal disease refers to a group of disorders affecting the gonads, leading to abnormal sex hormone synthesis or action, with clinical manifestations including ambiguous genitalia, delayed puberty, infertility, erectile dysfunction, hypogonadism, and sexual dysfunction. These conditions may result from genetic mutations, hormonal imbalances, environmental factors, infections, or underlying medical issues, and are often associated with gonadal dysgenesis—a congenital disorder characterized by fibrous stromal replacement of gonadal tissue without germ cells. Diagnosis involves genetic testing, hormonal assessments, and imaging to evaluate reproductive function and related comorbidities.
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Parathyroid Disease (7)
Parathyroid gland disease, also known as parathyroid disease, involves disorders of the parathyroid glands primarily associated with chief cell adenoma and familial isolated hypoparathyroidism. The PTH gene, encoding parathyroid hormone, plays a central role in this condition, with related biological pathways including signal transduction and steroid metabolism. The disease is linked to tissues such as the thyroid and kidney, and manifests through phenotypes involving homeostasis/metabolism and growth/size/body region. Acetaminophen and Tramadol have been noted in association with this disorder, although their precise role remains unclear.
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Energy Metabolism (24)
Disorders of energy metabolism are characterized by dysregulation in the processing and utilization of energy substrates, impacting essential physiological processes such as enzyme synthesis and hormonal control of energy homeostasis. These disturbances are closely linked to metabolic conditions including type 2 diabetes mellitus and polycystic ovary syndrome, with affected tissues primarily involving skeletal muscle and lung.
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Dietary Supplement (1)
Mineral dietary supplements are products designed to augment dietary intake by providing one or more essential minerals, commonly used to address nutrient deficiencies, particularly among individuals such as cancer patients. In the United States, about half of adults use dietary supplements, primarily to support general health and fill nutritional gaps. The most frequently consumed supplements include multivitamins, vitamin D, calcium, and magnesium. According to industry data from 2015, vitamin and mineral supplements were the most popular category, followed by specialty supplements, botanicals (herbs), and sports supplements.
Respiratory Disease
Respiratory disease refers to a group of conditions affecting the lungs and other components of the respiratory system, often resulting from infections, tobacco smoke exposure—either firsthand or secondhand—or inhalation of pollutants such as radon, asbestos, or other airborne toxins.
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Upper Respiratory Inflammation (7)
Upper Respiratory Tract Disease is associated with respiratory failure and tonsillitis, involving the gene MIR199A1 (MicroRNA 199a-1), which plays a role in pathways such as MicroRNAs in cardiomyocyte hypertrophy and Cell differentiation - expanded index, with affected tissues including testes and lung.
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Lower Respiratory Inflammation (142)
Lower respiratory inflammation is commonly triggered by infections such as bronchitis, bronchiolitis, or pneumonia, resulting in symptoms including cough, shortness of breath, chest pain, and fatigue.
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Pulmonary Disease (2532)
A type of disease that affects the lungs and other parts of the respiratory system. Pulmonary diseases may be caused by infection, by smoking tobacco, or by breathing in secondhand tobacco smoke, radon, asbestos, or other forms of air pollution. Pulmonary diseases include asthma, chronic obstructive pulmonary disease (COPD), pulmonary fibrosis, pneumonia, and lung cancer. Also called lung disorder and respiratory disease.
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Respiratory Cancer (1028)
Respiratory tract cancers, including lung and larynx cancers, are malignancies originating in the respiratory system, with circRNAs playing a significant role in their pathogenesis, progression, and potential as diagnostic, therapeutic, and prognostic biomarkers. The gene MIR199A1 (MicroRNA 199a-1) is notably associated with these cancers, involved in pathways such as cell differentiation and miRNAs in DNA damage response, primarily affecting lung and respiratory system tissues.
Digestive System Disease
A digestive disease disrupts digestion and causes health problems that range from mild to serious. There are several diseases and conditions of the digestive tract, such as gastroenteritis, celiac disease, constipation, diarrhea, IBS, IBD, colon polyps, and more.
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Digestive System Cancer (6068)
Digestive system cancers encompass a range of malignancies affecting the gastrointestinal tract, including colorectal carcinoma, small bowel adenocarcinoma, neuroendocrine tumors, and anal carcinoma, with increased risk in patients suffering from inflammatory bowel diseases. Esophageal cancer, comprising esophageal squamous cell carcinoma (ESCC) and esophageal adenocarcinoma (EAC), is a significant gastrointestinal malignancy influenced by risk factors such as heavy smoking, alcohol use, elevated BMI, and environmental exposures like nutritional deficiencies and nitrosamine-rich diets; genetic predisposition may also play a role, particularly in high-incidence regions. Clinical manifestations often include dysphagia, weight loss, hoarseness, and hemoptysis. Diagnosis relies on imaging studies and tissue biopsy, while management involves multimodal approaches including surgery, radiation therapy, chemotherapy, and nutritional support.
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Gastric Disease (129)
Gastric diseases encompass a variety of conditions affecting the stomach, including inflammatory disorders such as gastritis, as well as specific entities like Crohn disease and radiation-induced gastritis.
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Peptic Ulcer Disease (140)
Peptic ulcer disease (PUD) is a condition characterized by the development of open sores or ulcers in the lining of the stomach, duodenum, or lower esophagus, primarily caused by *Helicobacter pylori* infection or long-term use of non-steroidal anti-inflammatory drugs (NSAIDs). It may also result from stress-related conditions such as severe illness, burns, surgery, or central nervous system trauma. Common symptoms include upper abdominal pain (often burning or gnawing, sometimes relieved by eating), nausea, vomiting, bloating, belching, weight loss, and fatigue. Complications can involve bleeding, perforation, or gastric outlet obstruction. Diagnosis is typically confirmed through endoscopy (esophagogastroduodenoscopy), along with testing for *H. pylori* via blood, breath, or stool samples. Treatment involves antibiotics to eradicate *H. pylori*, acid-reducing medications such as proton pump inhibitors or H2 blockers, and lifestyle modifications including stress management and dietary changes. In refractory cases, surgical intervention may be required. Associated genes include *S100A8*, and pathways involved include signal transduction and gastrin signaling. Drugs like metronidazole and naproxen are linked to the disorder, with affected tissues including the small intestine and liver.
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Liver Disease (262)
Liver disease refers to a broad spectrum of conditions that impair liver function, including viral hepatitis, fatty liver disease, autoimmune disorders, genetic mutations, drug-induced injury, and liver cancer. These conditions can lead to symptoms such as jaundice, abdominal swelling, dark urine, pale stools, fatigue, and portal hypertension, with progression potentially resulting in cirrhosis or liver failure. Common causes include viral infections (hepatitis A, B, C), excessive alcohol intake, obesity, metabolic syndrome, inherited disorders (e.g., hemochromatosis, Wilson disease), and exposure to hepatotoxic drugs or toxins. Diagnostic approaches involve liver function tests, imaging, and biopsy, while management varies from lifestyle modifications and pharmacotherapy to liver transplantation in advanced cases. Key genes implicated include MEG3, and pathways related to metabolism, steroid metabolism, and mitochondrial function are frequently involved. Associated tissues include the liver and bone marrow, with phenotypic features such as reduced mammosphere formation and biliary system dysfunction.
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Constipation (16)
Constipation is a structural and functional disorder marked by difficulty in defecation, potentially caused by inadequate hydration, physical obstructions like polyps or tumors, or side effects of certain analgesics. A rare genetic condition, NRXN1-related severe neurodevelopmental disorder, is characterized by global developmental delay, profound intellectual disability, absent expressive language, hypotonia, seizures, autistic traits, and stereotypic movements.
Urogenital Disease
Urogenital tract diseases encompass disorders of the lower urinary system and related structures, often arising from neurological impairment, resulting in conditions such as neurogenic bladder dysfunction, urinary incontinence, and recurrent urinary tract infections.
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Urologic Disease (67)
Urinary System Disease, also referred to as urologic disease, encompasses disorders of the bladder and kidneys, characterized by symptoms such as dysuria, polyuria, and urinary urgency. The B2M gene (Beta-2-Microglobulin) is notably associated with this condition, with related biological pathways including Cell differentiation - expanded index and miRNAs involved in DNA damage response. Treatment options may include drugs such as Bupivacaine and Tranexamic acid, and affected tissues primarily include the kidney and prostate.
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Renal Disease (249)
Kidney Disease, also referred to as renal failure, encompasses conditions such as chronic kidney disease and polycystic kidney disease, characterized by symptoms including polyuria. The WT1 gene is a key genetic factor associated with this disorder, and the condition involves pathways such as epithelial to mesenchymal transition in colorectal cancer and NCAM signaling for neurite outgrowth. Treatment options include drugs like Fosinopril and Vildagliptin. Affected tissues include the kidney and heart, with related phenotypes involving the renal/urinary system and growth/size/body region.
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Male Reproductive System Disease (62)
Male reproductive system disease encompasses a range of disorders affecting organs and functions involved in male fertility and sexual health, including erectile dysfunction, premature ejaculation, low libido, testicular lumps, prostate disease, and infertility. These conditions may arise from physiological factors such as aging, kidney failure, and medication use (e.g., antidepressants), as well as psychological factors like stress and anxiety. Symptoms can include testicular pain, perineal discomfort, nipple discharge, and difficulties with sexual performance or conception. Genetic factors, such as variants in the MIR199A1 gene, and pathways involving p53 regulation and immune response may contribute to disease development. The prostate and bone are commonly affected tissues, and treatments may involve hormonal agents like progesterone and dydrogesterone. Early recognition and medical evaluation are crucial for effective management.
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Female Reproductive System Disease (63)
Female reproductive system diseases encompass a range of conditions affecting the vagina, cervix, uterus, ovaries, fallopian tubes, and breasts, leading to symptoms such as abnormal vaginal discharge, pelvic pain, menstrual irregularities, infertility, and in some cases, malignant transformation. Common disorders include vaginitis, pelvic inflammatory disease (PID), endometriosis, polycystic ovary syndrome (PCOS), and gynecological cancers such as cervical, ovarian, endometrial, and breast cancer. These conditions arise from diverse etiologies including bacterial infections, hormonal imbalances, genetic predispositions, and aberrant cell growth. Abnormalities in key genes like MIR199A1 and dysregulation of microRNA pathways involved in DNA damage response and immune cell interactions contribute to disease pathogenesis. Rare conditions such as abdominal pregnancy further illustrate the complexity of reproductive health. Affected tissues include the cervix and uterus, with clinical manifestations often involving leukorrhea, mastodynia, and genital itching. Treatments may involve antibiotics for infections, hormonal therapies for PCOS and endometriosis, and targeted interventions for malignancies, while drugs like alprazolam and propofol are noted in associated clinical contexts.
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Urogenital Cancer (4894)
Genitourinary cancers encompass malignancies affecting the urinary system in both men and women, as well as male reproductive organs. In men, these include prostate, bladder, kidney, adrenal gland, urethra, penile, and testicular cancers. In women, cancers of the reproductive organs are classified separately as gynecologic cancers. These cancers arise from abnormal cell growth in the genitourinary tract, including the kidneys, bladder, ureters, urethra, prostate, testes, and penis.
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Sexually Transmitted Disease (115)
Sexually Transmitted Diseases (STIs) are infections transmitted through sexual contact, including oral, anal, and vaginal routes, affecting individuals of all backgrounds. They encompass both curable (e.g., gonorrhea, chlamydia, syphilis, trichomoniasis) and treatable (e.g., herpes simplex virus, human papillomavirus, HIV) conditions. Common symptoms typically present as either genital discharge or dysuria, or as ulcerative lesions, and prevention is achievable through education and consistent use of barrier methods.
Musculoskeletal and Skin Disease
Musculoskeletal diseases encompass a broad range of conditions affecting muscles, bones, soft tissues, joints, and the spine, occurring across the lifespan. These disorders are classified based on the affected body region and whether they are inflammatory or non-inflammatory in nature.
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Arthritis (1883)
Arthritis is a group of conditions characterized by inflammation and damage to one or more joints, leading to symptoms such as pain, stiffness, swelling, redness, warmth, and reduced joint mobility. It encompasses over 100 different types, including osteoarthritis, rheumatoid arthritis, post-traumatic arthritis, and septic arthritis, each with distinct causes and progression patterns. Risk factors include aging, genetics, joint injury, obesity, and autoimmune dysfunction. While the exact etiology varies, underlying mechanisms often involve immune system activation, cartilage degradation, and synovial inflammation. Some forms can affect other organs, such as the skin, eyes, or lungs, and are associated with systemic manifestations. Key genetic factors include SYK (Spleen Associated Tyrosine Kinase), involved in immune signaling pathways like Innate Immune System and MIF Mediated Glucocorticoid Regulation. Treatment focuses on symptom management through medications like nonsteroidal anti-inflammatory drugs, corticosteroids (e.g., Prednisolone), disease-modifying antirheumatic drugs, physical therapy, lifestyle modifications, and in severe cases, surgical intervention. The condition significantly impacts quality of life, but early diagnosis and comprehensive management can slow progression and improve outcomes.
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Spinal Disease (15)
Spinal disease refers to a group of conditions affecting the spine and its surrounding structures, leading to symptoms such as back or neck pain, numbness, tingling, muscle weakness, loss of bladder or bowel control, and abnormal spinal curvature like kyphosis. These disorders can result from various causes including congenital abnormalities, trauma, infections, inflammatory conditions, inherited genetic factors, degenerative changes, or complications such as syringomyelia—a chronic spinal cord disorder often developing prenatally or following injury, tumor, or disease. The condition may compress nerves or the spinal cord, resulting in neurological deficits and impaired mobility. Treatment varies based on severity and etiology, and may involve pain management, physical therapy, or surgical intervention. Key associated genes include SMN1, with connections to motor neuron function and immune signaling pathways. Affected tissues include bone and bone marrow, and clinical manifestations often relate to growth, body structure, and metabolic homeostasis.
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Muscle Disease (123)
Muscle disease refers to a group of conditions that impair muscle function, broadly classified into acquired and inherited forms, with inherited types including genetic disorders like muscular dystrophy.
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Osteogenic Differentiation (29)
Osteogenic differentiation is the process by which multipotent stem cells commit to an osteogenic lineage and mature into osteogenic cells essential for bone regeneration, regulated by a combination of biochemical growth factors and physical cues that promote proliferation and lineage-specific differentiation.
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Skin Disease (37)
Skin diseases encompass any condition that irritates, clogs, or damages your skin, including autoimmune responses, infections, and cancers. Symptoms often include rashes, itching, redness, and dry patches.
