Pam2CSK4 TFA is a TLR2 agonist. Pam2CSK4 TFA induces the expression of iNOS and NO in macrophage cell lines via TBK1 and MyD88 molecules. Pam2CSK4 TFA activates the NF-κB and Bruton's tyrosine kinase signaling pathways in platelets, and promotes platelet-endothelial cell interactions. TLR2 activation triggered by Pam2CSK4 TFA expands myeloid-derived suppressor cells (MDSCs) and suppresses anti-tumor immune responses in the tumor microenvironment. Pam2CSK4 TFA acts as a Th2-polarizing adjuvant in mouse vaccine models against Leishmania major and Brugia malayi. Pam2CSK4 TFA can be used in the research of various diseases, including thromboinflammatory diseases, sepsis, atherosclerosis, heart failure, influenza, lymphoma, melanoma, cutaneous leishmaniasis and lymphatic filariasis .