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Methods to Study Cell Death Pathways in Platelets and Investigate Their Role in Platelet Survival and Pro-Thrombotic Function
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Paresh Kulkarni

Paresh Kulkarni

Institute of Medical Sciences, Banaras Hindu University, India

Dr. Paresh Kulkarni has been pursuing research in platelet biology for 12 years with a focus on various aspects of platelet metabolism and signaling networks. He completed his MD at Banaras Hindu University in India, where he studied platelet responses under energy stress and discovered that energy deprivation by inhibition of glycolysis can be a sound antiplatelet strategy. His studies also focused on the regulation and role of protein degradation machineries - proteasome and autophagy in platelet survival. At the University of Iowa, Dr. Kulkarni established that platelet toll-like receptor 4 (TLR4) mediates prothrombotic effects of cellular fibronectin. He also conceived and initiated work on targeting glycolytic enzyme pyruvate kinase M2 (PKM2) in platelets as an antithrombotic strategy. During his PhD, he established aerobic glycolysis and the consequent flux through pentose phosphate pathway as the metabolic signature of stimulated platelets, which is in turn indispensable for thrombosis and hemostasis. He found mitochondrial ATP generation to be redundant for platelet aggregation and procoagulant activity, but critical for granule secretion and thrombus formation. He also uncovered the essential role of beta oxidation of fatty acids in platelet function and thrombosis. He is currently investigating the role of platelets in the pathogenesis of thrombosis associated with antiphospholipid antibodies in patients of antiphospholipid syndrome and unique mouse models. 

Collection Overview

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. 

Articles

Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation
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Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation

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2025

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Abstracts

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