Mol Syst Biol:宿主肠道微生物或可调节机体抗氧化剂的代谢

2015-11-13 佚名 生物谷

图片来源:medicalxpress.com 最近,一项发表于国际杂志Molecular Systems Biology上的研究报告中,来自查尔摩斯工学院等处的科学家通过研究发现,肠道微生物可以调节宿主机体的谷胱甘肽和氨基酸的代谢;谷胱甘肽是在机体每个细胞中都存在的一种关键抗氧化剂,其缺失会引发机体氧化性应激反应,氧化性应激在多种生活方式疾病中扮演着重要角色。 肠道微生物的功能和多


图片来源:medicalxpress.com

最近,一项发表于国际杂志Molecular Systems Biology上的研究报告中,来自查尔摩斯工学院等处的科学家通过研究发现,肠道微生物可以调节宿主机体的谷胱甘肽和氨基酸的代谢;谷胱甘肽是在机体每个细胞中都存在的一种关键抗氧化剂,其缺失会引发机体氧化性应激反应,氧化性应激在多种生活方式疾病中扮演着重要角色。

肠道微生物的功能和多样性对于人类多种疾病的发生都是非常重要的调节子,肥胖、2型糖尿病、动脉粥样硬化、非酒精性脂肪肝等疾病都和肠道微生物的失衡直接相关,因此阐明肠道微生物、宿主胃肠道组织及其他周边组织之间的相互作用及关联对于理解如何改善宿主的健康至关重要。

这项研究中研究者就通过研究揭示,肠道维生素可以调节宿主机体的谷胱甘肽和氨基酸的代谢,谷胱甘肽是机体强有力的抗氧化剂,也是机体主要的解毒剂,其在机体免疫系统功能发挥、营养物代谢及其它重要的细胞事件的调节上扮演着重要角色。文章中研究者对小鼠机体的代谢进行了图谱的绘制,同时还开发出了针对主要小鼠组织的组织特异性计算机模型,通过整合高通量的实验数据,研究人员发现,小肠中的微生物群落可以消耗甘氨酸, 而甘氨酸是一种机体合成谷胱甘肽所需的重要氨基酸。

为了证实基于计算机模型的研究结果,研究者测定了小鼠门静脉中氨基酸的水平,结果在肝脏和结肠组织中发现了较低水平的甘氨酸,这就表明,肠道微生物可以进行谷胱甘肽的代谢,而这并不仅仅在小肠中发生,而在肝脏和结肠中亦可以发生。文章第一作者Adil Mardinoglu博士表示,肠道中的有些细菌可以消耗甘氨酸,此前研究发现,血浆中甘氨酸水平及其它氨基酸水平的失衡往往存在于多种疾病中,比如肥胖、2型糖尿病及非酒精性的脂肪肝中等。

本文研究中,研究者阐明小肠中的细菌可以消耗甘氨酸,并且对谷胱甘肽进行代谢,这就可以帮助研究人员开发出新型食品来帮助运输有益细菌进入宿主体内,而相关研究结果也可以帮助理解细菌在多种疾病发生过程中的关键角色,比如2型糖尿病、非酒精性脂肪肝等。

原文出处:

Adil Mardinoglu, Saeed Shoaie,et al.The gut microbiota modulates host amino acid and glutathione metabolism in mice.Mol Syst Biol.2015


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    2016-05-21 sunylz
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    2015-11-15 wincls
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