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Updated: Jan 13, 2026
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Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation
Published on: May 23, 2025
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Platelet aging and desialylation increase apoptotic priming and BCL-XL dependence
Renata Grozovsky1, Cameron S Fraser2,3,4, Xingping Qin2,3,4
1Miller School of Medicine, University of Miami, Miami, FL, USA.
Cell Death & Disease
|January 8, 2026
Summary
Platelet aging involves losing sialic acid and increasing apoptosis susceptibility, linked to higher BCL-XL dependence. Stimulating new platelet production may prevent thrombocytopenia from BCL-XL inhibitor cancer therapies.
Area of Science:
- Hematology
- Cell Biology
- Cancer Biology
Background:
- Platelets are crucial for hemostasis, immunity, and cancer progression.
- Platelet lifespan is regulated by desialylation and apoptosis, with BCL-XL essential for survival.
- BCL-XL inhibitors show cancer treatment promise but cause thrombocytopenia due to on-target effects.
Purpose of the Study:
- To investigate the relationship between platelet desialylation and apoptosis.
- To understand how this cross-talk impacts platelet lifespan.
- To explore therapeutic strategies for BCL-XL inhibitor-induced thrombocytopenia.
Main Methods:
- Analysis of platelet sialic acid levels and apoptosis markers in circulation and vitro.
- Assessment of BCL-XL dependence in young versus aged platelets.
- In vivo studies using romiplostim to modulate platelet production and prevent thrombocytopenia.
Main Results:
- Platelets progressively desialylate and become more apoptosis-primed with age.
- Desialylation increases BCL-XL dependence and accelerates apoptosis, reversible by sialidase inhibitors.
- Young platelets are less apoptosis-primed and BCL-XL-dependent.
- Romipostim prevents BCL-XL inhibitor-induced thrombocytopenia in vivo.
Conclusions:
- Platelet aging involves a functional link between desialylation and apoptosis, increasing BCL-XL dependence.
- Targeting platelet production with thrombopoietin receptor agonists may mitigate thrombocytopenia associated with BCL-XL inhibitors.
- This offers a potential strategy to enable BCL-XL inhibitor cancer therapy.
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