
Platelets have a circulating life span of 10–12 days, following which they undergo intrinsic apoptosis mediated by mitochondrial Bak/Bax and are subsequently cleared by macrophages if they do not encounter activating stimuli. However, the primary fate of procoagulant platelets generated upon vascular injury is cell death, which closely resembles necrosis. Although agonist-stimulated platelets also exhibit features of intrinsic apoptosis, including Bax/Bak accumulation, whether they activate caspase and contribute to agonist-induced platelet death remains controversial.
Extrinsic apoptosis by TNFα or FasL has not been reported in platelets despite the presence of pathway components and some evidence for caspase-8 activation. More recent studies have shown that platelets can also undergo programmed necrosis through necroptosis, pyroptosis, and ferroptosis pathways, which can have important implications for platelet survival and pro-thrombotic function in circulation.
This Methods Collection will include methods to study platelet cell death pathways during various pathophysiological states, including intrinsic apoptosis, extrinsic apoptosis, necrosis, necroptosis, pyroptosis, and ferroptosis. Furthermore, it will encompass methods for investigating the modulation of platelet cell death pathways to influence platelet lifespan in circulation, as well as thrombosis and hemostasis.
Unraveling platelet necrotic death pathway: tools and techniques for thrombosis research
Mohammad Ekhlak1,
Debabrata Dash*1
1Center for Advanced Research on Platelet Signaling and Thrombosis Biology, Department of Biochemistry, Institute of Medical Sciences, Banaras Hindu University, Varanasi, INDIA