SELP and cancer: Thus, various excellent reviews have been dedicated to the role of platelets in cancer metastasis in the last years, discussing the contribution of adhesion receptors like P-selectin, or integrin αIIbβIII, platelet-activating receptors such as P2Y12 or protease-activated receptor-1 (PAR-1), or platelet-derived growth factors and chemokines in detail [7–10].