Influence of vincristine, clinically used in cancer therapy and immune thrombocytopenia, on the function of human platelets

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題名:	Influence of vincristine, clinically used in cancer therapy and immune thrombocytopenia, on the function of human platelets
作者:	Li-Ming Lien;Wan-Jung Lu;Kuan-Hung Lin;Ling-Hsuan Kang;Ting-Yu Chen;Bo-Jung Lin;Hsuan Chen;Yao-Chou Tsai;Ray-Jade Chen;Joen-Rong Sheu
貢獻者:	視光學系
關鍵詞:	collagen;glycoprotein VI signaling;immune thrombocytopenia;platelet activation;vincristine
日期:	2021-09-01
上傳時間:	2025-08-11 14:44:06 (UTC+8)
摘要:	Vincristine is a clinically used antimicrotubule drug for treating patients with lymphoma. Due to its property of increasing platelet counts, vincristine is also used to treat patients with immune thrombocytopenia. Moreover, antiplatelet agents were reported to be beneficial in thrombotic thrombocytopenic purpura (TTP). Therefore, we investigated the detailed mechanisms underlying the antiplatelet effect of vincristine. Our results revealed that vincristine inhibited platelet aggregation induced by collagen, but not by thrombin, arachidonic acid, and the thromboxane A2 analog U46619, suggesting that vincristine exerts higher inhibitory effects on collagen-mediated platelet aggregation. Vincristine also reduced collagen-mediated platelet granule release and calcium mobilization. In addition, vincristine inhibited glycoprotein VI (GPVI) signaling, including Syk, phospholipase Cγ2, protein kinase C, Akt, and mitogen-activated protein kinases. In addition, the in vitro PFA-100 assay revealed that vincristine did not prolong the closure time, and the in vivo study tail bleeding assay showed that vincristine did not prolong the tail bleeding time; both findings suggested that vincristine may not affect normal hemostasis. In conclusion, we demonstrated that vincristine exerts antiplatelet effects at least in part through the suppression of GPVI signaling. Moreover, this property of antiplatelet activity of vincristine may provide additional benefits in the treatment of TTP.
關聯:	Molecules, 26(17), 5340. https://doi.org/10.3390/molecules26175340
顯示於類別:	[視光學系] 期刊論文

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