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- W2039640090 abstract "Platelets are anuclear cytoplasmic fragments essential for blood clotting and wound healing. Despite much speculation, the factors determining their life span in the circulation are unknown. We show here that an intrinsic program for apoptosis controls platelet survival and dictates their life span. Pro-survival Bcl-xL constrains the pro-apoptotic activity of Bak to maintain platelet survival, but as Bcl-xL degrades, aged platelets are primed for cell death. Genetic ablation or pharmacological inactivation of Bcl-xL reduces platelet half-life and causes thrombocytopenia in a dose-dependent manner. Deletion of Bak corrects these defects, and platelets from Bak-deficient mice live longer than normal. Thus, platelets are, by default, genetically programmed to die by apoptosis. The antagonistic balance between Bcl-xL and Bak constitutes a molecular clock that determines platelet life span: this represents an important paradigm for cellular homeostasis, and has profound implications for the diagnosis and treatment of disorders that affect platelet number and function." @default.
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- W2039640090 date "2007-03-01" @default.
- W2039640090 modified "2023-10-17" @default.
- W2039640090 title "Programmed Anuclear Cell Death Delimits Platelet Life Span" @default.
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- W2039640090 doi "https://doi.org/10.1016/j.cell.2007.01.037" @default.
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