کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2101273 1546250 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Busulfan Triggers Intrinsic Mitochondrial-Dependent Platelet Apoptosis Independent of Platelet Activation
ترجمه فارسی عنوان
بوسولفان عامل آپوپتوز وریدی قلبی وابسته به میتوکندری است که مستقل از فعال سازی پلاکت است
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی تحقیقات سرطان
چکیده انگلیسی


• Increased mitochondrial membrane depolarization in busulfan-treated platelets
• Busulfan-induced decreased expression of Bcl-2, increased expression of Bax, and caspase 3 activation in platelets
• No platelet activation induced by busulfan
• Busulfan reduced collagen- or adenosine diphosphate–induced platelet aggregation without affecting levels of glycoprotein Ibα, glycoprotein VI, and IIb3
• Busulfan reduced circulating platelet lifespan in mice

As a nonspecific alkylating antineoplastic agent, busulfan has been widely used in the treatment of patients with chronic myeloid leukemia. In vitro and in vivo studies demonstrated busulfan-induced cell apoptosis. Whether busulfan triggers platelet apoptosis remains unclear. This study aimed to evaluate the role of busulfan in platelet apoptosis. Isolated human platelets were incubated with busulfan followed by analysis of platelet apoptosis by flow cytometry or western blot, including mitochondrial depolarization, expression of Bcl-2, and Bax and caspase 3 activation. Meanwhile, platelet activation, expression of glycoprotein Ibα (GPIbα), glycoprotein VI (GPVI), and IIb3 and platelet aggregation in response to collagen and adenosine diphosphate (ADP) were measured. Additionally, busulfan was injected into mice with or without administration of caspase inhibitor QVD-Oph to investigate its effect on platelet lifespan. Our results showed that busulfan-treated platelets displayed increased mitochondrial membrane depolarization, decreased expression of Bcl-2, increased expression of Bax and caspase 3 activation in dose-dependent manner, which were inhibited by QVD-Oph. Platelet activation was not observed in busulfan-treated platelets as showed by no increased P-selectin expression and PAC-1 binding. However, busulfan reduced collagen- or ADP-induced platelet aggregation without affecting expression of GPIbα, GPVI, and IIb3. Furthermore, busulfan reduced circulating platelet lifespan which was ameliorated by QVD-Oph in mice. In conclusion, busulfan triggers mitochondrial-dependent platelet apoptosis and reduces platelet lifespan in mice. These data suggest targeting caspase activation might be beneficial in the prophylaxis of platelet apoptosis-associated thrombocytopenia after administration of busulfan.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: - Volume 22, Issue 9, September 2016, Pages 1565–1572
نویسندگان
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