贾伟等:普洱茶如何作用于肠道菌群来降胆固醇?
  • 小鼠和人类中,普洱茶可降血脂和胆固醇,该作用由肠道菌群介导;
  • 普洱茶中的茶褐素可重塑肠道菌群,抑制胆盐水解酶活性及相关微生物;
  • 这使得肠道中的TCDCA和TUDCA等结合胆酸水平升高,进而抑制肠道FXR-FGF15信号通路,促进肝脏生成胆汁酸(BA);
  • 同时肝脏FXR-SHP信号通路活化,激活BA替代合成通路的酶CYP7B1表达,促进鹅去氧胆酸合成,激活肝FXR,促进脂解;
  • 肝脏BA合成使胆固醇消耗增加,伴随粪便排出BA增多,导致血液胆固醇降低。
主编推荐语
mildbreeze
普洱茶具有降脂功效,Nature Communications本周发表了来自贾伟团队的研究,揭示了背后的生物学机制。上海交大黄凤杰博士为第一作者,上海交大附属第六人民医院贾伟、赵爱华和上海中医药大学李后开为论文共同通讯作者。这项研究发现,普洱茶富含的多酚物质茶褐素,可通过调节肠道菌群、抑制菌群水解初级胆汁酸,来调控肠肝对话,促进肝脏消耗胆固醇生成胆汁酸,并增加胆汁酸的粪便排出。这些发现阐释了普洱茶降低胆固醇的机制,表明抑制肠道中表达胆盐水解酶的微生物,或者减少肠道FXR-FGF15/19信号,是治疗高胆固醇血症和高血脂症的潜在疗法。
关键字
延伸阅读本研究的原文信息和链接出处,以及相关解读和评论文章。欢迎读者朋友们推荐!
图片

Theabrownin from Pu-erh tea attenuates hypercholesterolemia via modulation of gut microbiota and bile acid metabolism

普洱茶茶褐素通过调节肠道菌群和胆汁酸代谢缓解高胆固醇血症

10.1038/s41467-019-12896-x

2019-10-31, Article

Abstract & Authors:展开

Abstract:收起
Pu-erh tea displays cholesterol-lowering properties, but the underlying mechanism has not been elucidated. Theabrownin is one of the most active and abundant pigments in Pu-erh tea. Here, we show that theabrownin alters the gut microbiota in mice and humans, predominantly suppressing microbes associated with bile-salt hydrolase (BSH) activity. Theabrownin increases the levels of ileal conjugated bile acids (BAs) which, in turn, inhibit the intestinal FXR-FGF15 signaling pathway, resulting in increased hepatic production and fecal excretion of BAs, reduced hepatic cholesterol, and decreased lipogenesis. The inhibition of intestinal FXR-FGF15 signaling is accompanied by increased gene expression of enzymes in the alternative BA synthetic pathway, production of hepatic chenodeoxycholic acid, activation of hepatic FXR, and hepatic lipolysis. Our results shed light into the mechanisms behind the cholesterol- and lipid-lowering effects of Pu-erh tea, and suggest that decreased intestinal BSH microbes and/or decreased FXR-FGF15 signaling may be potential anti-hypercholesterolemia and anti-hyperlipidemia therapies.

First Authors:
Fengjie Huang

Correspondence Authors:
Houkai Li,Aihua Zhao,Wei Jia

All Authors:
Fengjie Huang,Xiaojiao Zheng,Xiaohui Ma,Runqiu Jiang,Wangyi Zhou,Shuiping Zhou,Yunjing Zhang,Sha Lei,Shouli Wang,Junliang Kuang,Xiaolong Han,Meilin Wei,Yijun You,Mengci Li,Yitao Li,Dandan Liang,Jiajian Liu,Tianlu Chen,Chao Yan,Runmin Wei,Cynthia Rajani,Chengxing Shen,Guoxiang Xie,Zhaoxiang Bian,Houkai Li,Aihua Zhao,Wei Jia

评论