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Nat Commun:新型蛋白MG53可有效抵御肺损伤

2014-08-19 佚名 健康报

第三军医大学大坪医院野战外科研究所心血管内科曾春雨教授、陈垦博士团队和美国俄亥俄州立大学麻建杰教授团队历时2年联合研究发现,新型蛋白MG53对感染、创伤、缺血等多种急性肺损伤具有保护作用,该蛋白能像创可贴一样,即时修复各种损伤对细胞膜造成的“伤口”。相关研究论文日前发表在《自然.通讯》上。创伤、缺血、感染等多种严重的病理生理状态均会导致肺急性损伤,造成局部或全身的炎症反应,形成肺水肿,影响机体的血

第三军医大学大坪医院野战外科研究所心血管内科曾春雨教授、陈垦博士团队和美国俄亥俄州立大学麻建杰教授团队历时2年联合研究发现,新型蛋白MG53对感染、创伤、缺血等多种急性肺损伤具有保护作用,该蛋白能像创可贴一样,即时修复各种损伤对细胞膜造成的“伤口”。相关研究论文日前发表在《自然.通讯》上。

创伤、缺血、感染等多种严重的病理生理状态均会导致肺急性损伤,造成局部或全身的炎症反应,形成肺水肿,影响机体的血气交换,导致低氧血症。严重的急性肺损伤会导致多器官脏器衰竭而致人死亡。

前期研究证实,MG53对心脏和骨骼肌损伤有保护作用。为了研究该蛋白对肺损伤是否有保护作用,从2012年5月开始,曾春雨研究团队和麻建杰研究团队以大鼠和MG53基因敲除小鼠为研究对象,构建缺血再灌注、过度通气和感染等急性肺损伤模型,以静脉推注或气道输送等方式给药,发现这种来源于横纹肌的新型蛋白MG53可像创可贴一样封堵细胞膜缺口,达到提高细胞生存的作用。

实验证实,MG53在肺组织上具有特定的生理功能,对于实验动物的急性肺损伤具有治疗作用,而缺乏MG53将会加重缺血再灌注和过度通气对肺组织的损伤。给予急性肺损伤的实验动物静脉注射或吸入人工合成的MG53蛋白,可有效减轻肺损伤的症状和肺气肿的程度,重复使用人工合成的MG53也可改善慢性损伤对肺部结构的改变。

这一研究成果对改善患者预后、提高生存率具有重要意义,特别是MG53可以人工合成,为预防和治疗肺组织损伤开辟了全新的思路。

曾春雨介绍,研究发现的MG53是运动过程中人体骨骼肌分泌的蛋白质,虽然运动如何改善心肺功能的机理目前尚不清楚,但该蛋白不仅对心肺损伤有治疗作用,对预防心肺损伤、改善心肺功能同样具有重要意义,证实了运动可以改善心肺功能。


原始出处:

Jia Y1, Chen K2, Lin P3, Lieber G4, Nishi M5, Yan R6, Wang Z7, Yao Y7, Li Y7, Whitson BA8, Duann P8, Li H8, Zhou X8, Zhu H9, Takeshima H5, Hunter JC4, McLeod RL4, Weisleder N10, Zeng C7, Ma J11.Treatment of acute lung injury by targeting MG53-mediated cell membrane repair.Nat Commun. 2014 Jul 18;5:4387. doi: 10.1038/ncomms5387.

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    2015-01-06 liye789132251
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    2014-11-08 liuli5079
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    2014-08-21 tastas
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    2014-08-19 42.122.195.208

    MG53分布在肺脏?

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