Nat Med:巨核细胞可控制造血干细胞 有望治疗多种疾病

2014-10-22 佚名 生物谷

巨核细胞被认为是产生血小板愈合伤口最好的细胞,这些在骨髓中发现的巨大细胞在调节干细胞上也扮演着重要的角色,这是近日来自美国密苏里州斯托瓦斯医学研究所(Stowers Institute for Medical Research)的研究人员的一项重大研究发现,相关研究成果刊登于国际杂志Nature Medicine上。 实际上,造血干细胞在骨髓中可以分化形成巨核细胞,而本文研究者也首次发现造血

巨核细胞被认为是产生血小板愈合伤口最好的细胞,这些在骨髓中发现的巨大细胞在调节干细胞上也扮演着重要的角色,这是近日来自美国密苏里州斯托瓦斯医学研究所(Stowers Institute for Medical Research)的研究人员的一项重大研究发现,相关研究成果刊登于国际杂志Nature Medicine上。

实际上,造血干细胞在骨髓中可以分化形成巨核细胞,而本文研究者也首次发现造血干细胞可以直接被巨核细胞所控制,即母体细胞会被子代细胞所控制;研究者Meng Zhao博士表示,我们的研究结果显示,巨核细胞或许可以被应用于临床中来促进成体干细胞进行细胞再生,并且扩大细胞的培养来用于进行成体干细胞的移植。巨核细胞可以直接调节鼠类造血干细胞的功能,而成体干细胞可以形成血液和免疫细胞用以更新机体的血液供应,这些成体干细胞也可以分化产生多种类型的血细胞,包括白细胞、红细胞及血小板等。

由于具有自我更新及分化形成多种类型细胞的能力,因此近年来造血干细胞受到了科学界的极大关注,研究者已经开始利用造血干细胞进行许多人类疾病的治疗;而离体的人类造血干细胞的移植也用于治疗贫血、免疫缺陷及其它疾病。研究人员表示,巨核细胞可以通过“告知”造血干细胞何时应该休眠,何时应该增殖满足机体需求来直接调节造血干细胞的水平;而维持造血干细胞产量的平衡也至关重要。

最后研究者Li说道,我们的研究揭示了,巨核细胞是患者化疗后机体造血干细胞恢复功能所必需的,本文研究为利用巨核细胞衍生的因子,比如TGF-B1和FGF1来促进造血干细胞再生提供了新的思路和帮助,后期研究者将通过研究分析是否巨核细胞的生境可以用于帮助造血干细胞在体外进行扩大培养和移植。

原始出处

Zhao M1, Perry JM1, Marshall H1, Venkatraman A2, Qian P1, He XC1, Ahamed J3, Li L4.Megakaryocytes maintain homeostatic quiescence and promote post-injury regeneration of hematopoietic stem cells.Nat Med. 2014 Oct 19.

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    2015-08-07 liye789132251
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    2014-10-24 俅侠
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