PGPC is an oxidized phospholipid that can be formed under conditions of oxidative stress.{15289} It is found as a component in mildly oxidized LDL (MM-LDL) and in products formed from the oxidation of 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine (Ox-PAPC).{10395} PGPC activates peroxisome proliferator-activated receptor (PPARa) in a concentration-dependent manner in a cell-based ligand-binding assay.{37721} It increases VCAM1 and E-selectin expression in human aortic endothelial cells (HAECs), as well as HAEC binding by monocytes and polymorphonuclear neutrophils (PMNs), in a concentration-dependent manner.{10396} PGPC (37.5 ?M) also increases total 5-lipoxygenase metabolites in murine resident peritoneal macrophages (RPMs) and induces apoptosis in A7r5 rat aortic smooth muscle cells in vitro when used at a concentration of 50 ?M.{37717,37718} PGPC levels are increased in the serum, LDL, and peripheral blood mononuclear cells (PBMCs) of patients with coronary artery disease.{37719} UVA irradiation increases PGPC levels in cultured human skin fibroblasts.{37720}