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Blood:维生素K拮抗剂可影响骨髓微环境及造血

2019-04-20 MedSci MedSci原创

64年来,全世界约有1%的人在服用维生素K拮抗剂(VKA)预防或质量血栓栓塞。部分服用VKA的患者出现成骨细胞功能受损和骨质疏松症。

中心点:

华法林可通过减少巨噬细胞骨膜蛋白的分泌破坏小鼠的造血功能;骨膜蛋白与HSC上的整合素 &β3结合。

维生素K的拮抗作用可影响人类HSC的移植,与白细胞计数和MDS减少相关。

摘要:

64年来,全世界约有1%的人在服用维生素K拮抗剂(VKA)预防或质量血栓栓塞。部分服用VKA的患者出现成骨细胞功能受损和骨质疏松症。

考虑到维持正常的造血干细胞(HSC)还需要骨髓微环境(BMM)中的细胞的参与,如间充质干细胞(MSC)和巨噬细胞,还有其他因子,如细胞外基质等因素,现研究人员通过BMM研究VKA对造血作用的潜在影响。

通过多种移植和体外实验,研究人员发现VKA可改变骨生理参数,降低HSC的功能,多达8倍。巨噬细胞γ羧酸化的骨膜蛋白维生素K依赖性的分泌功能受损,BMM中的MSC和HSC中的整合素β3-AKT信号在部分程度上可导致上述效应,而VKA并HSC无直接毒性作用。

服用VKA可轻度降低患者的白细胞计数和单核细胞计数,但仍在正常范围内。VKA可减少免疫抑制小鼠的人HSC移植。此外,研究人员还发现在确诊骨髓增生异常综合征(MDS)的患者中,服用VKA的概率要高于无MDS的患者的,但目前尚未明确服用VKA和罹患MDS是否存在因果关系。

总而言之,本研究表明VKA治疗可通过影响BMM损害HSC功能,骨膜蛋白-整合素β3信号轴可能与MDS风险增高相关。

原始出处:

Divij Verma, et al. Vitamin K-antagonism impairs the bone marrow microenvironment and hematopoiesis. Blood 2019 :blood.2018874214; doi: https://doi.org/10.1182/blood.2018874214 

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    2019-04-22 俅侠
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    2019-04-20 122b9cbbm13暂无昵称

    学习了 多谢!

    0

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    2019-04-20 329523732

    不错

    0

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    2019-04-20 王秀

    学习了,涨知识了!

    0

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