SELP and cancer: Moreover, activated platelets express P-selectin (CD62P/GMP-140) on their cell surface [61–63], which binds to its ligand, P-selectin glycoprotein ligand-1 (PSGL-1), that is expressed on the cell surface of most leukocytes, such as neutrophils, monocytes, Th1 lymphocytes, eosinophils, and basophils, and facilitates inflammation, hemostasis, thrombosis, and the growth and metastasis of cancer [62, 64].