Cell Stem Cell:科学家鉴别出饮食压力状态下支持血细胞产生的特殊分子

2018-05-10 佚名 细胞

位于骨髓中的造血干细胞(HSCs)能够调节血细胞的产生,当处于特定的压力状况下,比如炎症和衰老,造血干细胞的自我更新能力就会降低,日前,一项刊登于国际杂志Cell Stem Cell上的研究报告中,来自日本金泽大学(Kanazawa University)的科学家们通过研究阐明了Spred1分子在造血干细胞维持动态平衡(自我更新)中所扮演的关键角色,在摄入高脂肪饮食的小鼠体内,Spred1或能保护

位于骨髓中的造血干细胞(HSCs)能够调节血细胞的产生,当处于特定的压力状况下,比如炎症和衰老,造血干细胞的自我更新能力就会降低,日前,一项刊登于国际杂志Cell Stem Cell上的研究报告中,来自日本金泽大学(Kanazawa University)的科学家们通过研究阐明了Spred1分子在造血干细胞维持动态平衡(自我更新)中所扮演的关键角色,在摄入高脂肪饮食的小鼠体内,Spred1或能保护造血干细胞的稳态。



研究者表示,Spred1能够结合c-Kit分子,c-Kit主要参与一种能指导造血干细胞发育和调节的信号过程,对Spred1缺陷的小鼠进行实验后,研究人员发现,在没有压力的状况下Spred1对于正常的血细胞产生或许并不重要,此外,Spred1的缺失还会促进造血干细胞的自我更新,从而就能延长细胞的寿命,增加机体的竞争力并有效抵御生理性压力。

然而,当研究人员观察高脂肪饮食对Spred1缺陷的小鼠所产生的效应时,他们发现,饮食会诱导特殊血液癌症的发生,相关研究或许表明,Spred1在调节造血干细胞在体内平衡的过程中扮演着关键的角色。文章中,研究人员强调了Spred1与造血作用之间的复杂关联,同时他们还阐明了该蛋白质的功能也饮食压力之间的关系,研究者总结道,调查饮食因素在干细胞自我更新过程中的病理生理学角色,同时寻找有效的手段来操控Spred1所介导的造血干细胞自我更新的控制,或许就能帮助科学家们开发新型创新性技术来有效抑制饮食相关疾病的发生。

血细胞的生成时机体血液细胞组分形成的重要过程,所有的血液组分都由造血干细胞产生,而造血干细胞位于骨髓中,能够分化成为不同类型的血细胞,比如红细胞、淋巴细胞和髓系细胞等,当其分化时,所产生的部分细胞就会再度成为造血干细胞,这就是一种自我更新的过程。

如今研究人员深入在小鼠模型中阐明了蛋白质Spred1(sprouty相关的EVH1结构域包含单边)和造血干细胞自我更新之间的关联,从一方面来讲,研究者发现,在正常情况下,Spred1或许能够扮演造血干细胞自我更新的负面调节子,而从另一方面来讲,在饮食诱导所产生的压力状况下,该蛋白质又能保护体内造血的动态平衡。

原始出处:

Tadokoro Y, et al.Spred1 Safeguards Hematopoietic Homeostasis against Diet-Induced Systemic Stress. Cell Stem Cell. 2018 May 3;22(5):713-725.e8.

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    2018-06-05 维他命
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    2018-05-12 zhaojie88

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吴祖泽:曾以胎肝造血干细胞移植救治放射病

吴祖泽近照。党的十九大刚一闭幕,中国科学院院士、军事科学院军事医学研究院研究员吴祖泽的实验室就迎来两位十九大代表——他们是王福生和哈小琴,同是吴院士的学生,同在这个实验室学习和工作过。师生热议十九大,年逾八旬的吴院士兴奋地说:“十九大确定的强军时间表鼓舞着每一个人,我们要在自己从事的领域努力跟随科技兴军时代步伐!”两位学生明白吴祖泽院士此番话的深意。这番话,不仅折射了吴院士一生矢志强军报国的追求,