Hepatology:健康的肠微菌群对非酒精性脂肪性肝炎的巨大作用!

2017-11-15 MedSci MedSci原创

门静脉高压(PH)驱动着慢性肝病患者大部分的临床并发症。然而,其在非酒精性脂肪性肝炎(NASH)患者中的进展及其与肠道微生物群(IM)的关联目前几乎没有研究。近期,一项发表在杂志Hepatology上的研究评估了IM在早期NASH导致PH的机制中的作用。此项研究的实验设计分为两个阶段:阶段1:用高脂饮食和高葡萄糖/果糖糖浆(HFGFD)或对照饮食/水(CD)饲喂Sprague-Dawley大鼠8周

门静脉高压(PH)驱动着慢性肝病患者大部分的临床并发症。然而,其在非酒精性脂肪性肝炎(NASH)患者中的进展及其与肠道微生物群(IM)的关联目前几乎没有研究。


近期,一项发表在杂志Hepatology上的研究评估了IM在早期NASH导致PH的机制中的作用。

此项研究的实验设计分为两个阶段:阶段1:用高脂饮食和高葡萄糖/果糖糖浆(HFGFD)或对照饮食/水(CD)饲喂Sprague-Dawley大鼠8周。阶段2:另外的HFGFD和CD大鼠进行肠道去污,然后用来自相反饮食供体(异源移植组,Tr)或自体粪便移植(Atr)(对照组)的粪便进行IM移植。由此产生四组:CD-Atr,CD-Tr,HFGFD-Atr,HFGFD-Tr。 IM移植后,原始饮食维持12-14天,直到处以安乐死。

研究结果显示:HFGFD大鼠出现肥胖、胰岛素抵抗、NASH无纤维化但有PH、肝内皮功能障碍和IM生态失调。在HFGFD大鼠中,来自CD供体的粪便移植导致PH显着降低,低至与CD相当的水平,而NASH组织学没有显着变化。与HFGFD-Atr相比,PH降低是由于肝内血管阻力降低了31%(p <0.05)。

这种作用是通过恢复对肝脏Akt依赖性eNOS信号传导途径的胰岛素敏感性而发生。

此项研究结果表明,肠道微生物群对饮食诱导的NASH和生态失调大鼠的PH发展有直接影响。当恢复健康的肠道微生物群时,门静脉高压、胰岛素抵抗和内皮功能障碍可以恢复。

原始出处:
García-Lezana T, Raurell I, et al. Restoration of A Healthy Intestinal Microbiota Normalizes Portal Hypertension In A Rat Model of Nonalcoholic Steatohepatitis. Hepatology. 2017 Nov 7. doi: 10.1002/hep.29646.

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    2018-07-30 qjddjq
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    2017-11-17 gwc384