Blood:IGF-1通过激活Akt促进血小板生成

2018-05-27 MedSci MedSci原创

中心点:IGF-1可促进MK分化、形成血小板前体以及血小板释放。IGF-1对血栓形成的影响主要受SRC-3协助AKT激活所介导。摘要:众所周知,胰岛素样生长因子-1(IGF-1)还可作为造血生长因子,但其对血栓形成的直接作用尚不清楚。近日,Blood杂志上发表一篇文章,Shilei Chen等人发现IGF-1可促进CD34+细胞分化成巨核细胞(MKs),并能促进体外培养的MKs细胞形成血小板前体(

中心点:

IGF-1可促进MK分化、形成血小板前体以及血小板释放。

IGF-1对血栓形成的影响主要受SRC-3协助AKT激活所介导。

摘要:

众所周知,胰岛素样生长因子-1(IGF-1)还可作为造血生长因子,但其对血栓形成的直接作用尚不清楚。近日,Blood杂志上发表一篇文章,Shilei Chen等人发现IGF-1可促进CD34+细胞分化成巨核细胞(MKs),并能促进体外培养的MKs细胞形成血小板前体(PPF)和血小板。研究人员同时用体内研究证实给放射(6.0Gy)处理过的和致命性放射(10.0Gy)后进行骨髓移植(BMT)的小鼠注射IGF-1可促进其血小板恢复。

深入研究发现ERK1/2和Akt激活介导IGF-1对血小板形成的作用。而且,与用促血小板生成素(TPO)处理所诱导的效应相比,IGF-1所诱导Akt激活明显高于ERK1/2激活。此外,IGF-1治疗还可显著增加TPO受体纯合突变小鼠的血小板计数,因此研究人员推测IGF-1对血小板形成的效应不依赖于TPO信号,进一步研究显示IGF-1触发的Akt激活需要类固醇受体共激活剂-3(SRC-3)辅助。

总而言之,本研究数据揭示了IGF-1调控血小板生成的独特作用,为了解血小板生成的TPO非依赖性调控机制提供新的见解。

原始出处:

Shilei Chen,et al. IGF-1 facilitates thrombopoiesis primarily through Akt activation. Blood  2018  :blood-2018-01-825927;  doi: https://doi.org/10.1182/blood-2018-01-825927

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    2019-02-08 xxxx1049
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    2018-07-27 xfpan20
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    2019-02-06 qingrejiedu
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    2018-05-28 kafei

    学习了谢谢

    0

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    2018-05-27 ysb-1971

    谢谢分享

    0

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    2018-05-27 为你把脉

    vvv刚刚好哈哈哈

    0

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