Platelet-activating factor receptor (PTAFR) Antibody

Background

PTAFR is a G protein-coupled receptor activated by platelet-activating factor (PAF), a potent phospholipid mediator involved in inflammation, immune responses, and thrombosis. PTAFR is widely expressed on platelets, endothelial cells, leukocytes, and in various tissues, where it mediates diverse inflammatory and immune responses. Upon activation, PTAFR couples to Gq and Gi proteins, leading to calcium mobilization, activation of phospholipase C (PLC), and downstream signaling pathways that promote chemotaxis, cytokine release, and oxidative stress. PTAFR plays a central role in allergic reactions, asthma, cardiovascular dysfunction, and sepsis by amplifying inflammatory cascades and vascular permeability. Dysregulation of PTAFR is associated with chronic inflammatory diseases, ischemic injuries, and immune-related conditions. PTAFR antagonists are being explored as potential therapeutics for asthma, sepsis, and cardiovascular diseases by suppressing excessive PAF-mediated inflammation and thrombosis. Its involvement in inflammation and vascular responses positions PTAFR as a critical target for treating immune and inflammatory disorders.