Ulcerative colitis(UC) is an inflammatory disease that mainly affects the colon and rectum. It is believed that genetic factors, host immune system disorders, intestinal microbiota dysbiosis, and environmental factors...Ulcerative colitis(UC) is an inflammatory disease that mainly affects the colon and rectum. It is believed that genetic factors, host immune system disorders, intestinal microbiota dysbiosis, and environmental factors contribute to the pathogenesis of UC. however, studies on the role of intestinal microbiota in the pathogenesis of UC have been inconclusive. Studies have shown that probiotics improve intestinal mucosa barrier function and immune system function and promote secretion of anti-inflammatory factors, thereby inhibiting the growth of harmful bacteria in the intestine. Fecal microbiota transplantation(FMT) can reduce bowel permeability and thus the severity of disease by increasing the production of short-chain fatty acids, especially butyrate, which help maintain the integrity of the epithelial barrier. FMT can also restore immune dysbiosis by inhibiting Th1 differentiation, activity of T cells, leukocyte adhesion, and production of inflammatory factors. Probiotics and FMT are being increasingly used to treat UC, but their use is controversial because of uncertain efficacy. Here, we briefly review the role of intestinal microbiota in thepathogenesis and treatment of UC.展开更多
人体肠道内栖居着数以万亿计的微生物,这些微生物在繁衍的过程中逐渐达到种类和数量的平衡,而这种平衡与机体正常代谢密切相关。一旦肠道菌群结构发生失调,各种代谢类疾病便随之而来。益生菌在肠道内的大量繁衍,可调节紊乱的肠道菌群结...人体肠道内栖居着数以万亿计的微生物,这些微生物在繁衍的过程中逐渐达到种类和数量的平衡,而这种平衡与机体正常代谢密切相关。一旦肠道菌群结构发生失调,各种代谢类疾病便随之而来。益生菌在肠道内的大量繁衍,可调节紊乱的肠道菌群结构并提高机体的免疫能力,进而帮助恢复健康水平。近年来,国际上科学研究的热点逐渐集中于益生菌对肠道菌群的影响以及肠道菌群和疾病的关系。本文概述国内外有关益生菌影响肠道菌群的研究现状。以1株具有完全自主知识产权并且已成功实施产业化应用的益生菌菌株——Lactobacillus casei Zhang为例,详实说明益生菌对人肠道菌群的影响。在此基础上提出本学科现存的若干研究瓶颈及今后的发展方向。展开更多
目的探讨冠心病患者的肠道菌群变化及肠道菌群对尿酸的分解活性之间的相关性。方法选取2008年1月至2011年6月冠心病患者粪便标本及血清标本60例及正常对照标本35例,运用SYBR Green Ⅰ实时荧光定量PCR反应测定肠道菌群数量以进行菌群分析...目的探讨冠心病患者的肠道菌群变化及肠道菌群对尿酸的分解活性之间的相关性。方法选取2008年1月至2011年6月冠心病患者粪便标本及血清标本60例及正常对照标本35例,运用SYBR Green Ⅰ实时荧光定量PCR反应测定肠道菌群数量以进行菌群分析,运用酶比色法检测粪便尿酸含量,磷钨酸法检测血尿酸水平。结果患者组粪便中肠道细菌总负荷明显增加,其中,双歧杆菌及乳酸杆菌明显减少(P<0.05);大肠杆菌、幽门螺杆菌、链球菌均明显增加,以链球菌更为明显(P<0.05)。患者组肠道菌群对尿酸的分解活性及血尿酸水平均明显升高,肠道菌群对尿酸的分解活性与粪便标本中细菌总负荷及大肠杆菌含量呈正相关,以与大肠杆菌含量的相关性明显,并与血尿酸水平呈正相关(P<0.05)。结论冠心病患者存在肠道菌群紊乱,并与肠道细菌对尿酸的代谢活性相关,提示肠道菌群的变化与冠心病的发生及发展机理有一定关系,肠道菌群失衡可能是促进冠心病发生的原因之一,肠道菌群对尿酸的代谢能力可能参与这一致病过程。展开更多
基金Supported by the National Natural Science Foundation of China,No.81670504 and No.81472287the New Xiangya Talent Project of the Third Xiangya Hospital of Central South University,No.20150308
文摘Ulcerative colitis(UC) is an inflammatory disease that mainly affects the colon and rectum. It is believed that genetic factors, host immune system disorders, intestinal microbiota dysbiosis, and environmental factors contribute to the pathogenesis of UC. however, studies on the role of intestinal microbiota in the pathogenesis of UC have been inconclusive. Studies have shown that probiotics improve intestinal mucosa barrier function and immune system function and promote secretion of anti-inflammatory factors, thereby inhibiting the growth of harmful bacteria in the intestine. Fecal microbiota transplantation(FMT) can reduce bowel permeability and thus the severity of disease by increasing the production of short-chain fatty acids, especially butyrate, which help maintain the integrity of the epithelial barrier. FMT can also restore immune dysbiosis by inhibiting Th1 differentiation, activity of T cells, leukocyte adhesion, and production of inflammatory factors. Probiotics and FMT are being increasingly used to treat UC, but their use is controversial because of uncertain efficacy. Here, we briefly review the role of intestinal microbiota in thepathogenesis and treatment of UC.
文摘人体肠道内栖居着数以万亿计的微生物,这些微生物在繁衍的过程中逐渐达到种类和数量的平衡,而这种平衡与机体正常代谢密切相关。一旦肠道菌群结构发生失调,各种代谢类疾病便随之而来。益生菌在肠道内的大量繁衍,可调节紊乱的肠道菌群结构并提高机体的免疫能力,进而帮助恢复健康水平。近年来,国际上科学研究的热点逐渐集中于益生菌对肠道菌群的影响以及肠道菌群和疾病的关系。本文概述国内外有关益生菌影响肠道菌群的研究现状。以1株具有完全自主知识产权并且已成功实施产业化应用的益生菌菌株——Lactobacillus casei Zhang为例,详实说明益生菌对人肠道菌群的影响。在此基础上提出本学科现存的若干研究瓶颈及今后的发展方向。
文摘目的探讨冠心病患者的肠道菌群变化及肠道菌群对尿酸的分解活性之间的相关性。方法选取2008年1月至2011年6月冠心病患者粪便标本及血清标本60例及正常对照标本35例,运用SYBR Green Ⅰ实时荧光定量PCR反应测定肠道菌群数量以进行菌群分析,运用酶比色法检测粪便尿酸含量,磷钨酸法检测血尿酸水平。结果患者组粪便中肠道细菌总负荷明显增加,其中,双歧杆菌及乳酸杆菌明显减少(P<0.05);大肠杆菌、幽门螺杆菌、链球菌均明显增加,以链球菌更为明显(P<0.05)。患者组肠道菌群对尿酸的分解活性及血尿酸水平均明显升高,肠道菌群对尿酸的分解活性与粪便标本中细菌总负荷及大肠杆菌含量呈正相关,以与大肠杆菌含量的相关性明显,并与血尿酸水平呈正相关(P<0.05)。结论冠心病患者存在肠道菌群紊乱,并与肠道细菌对尿酸的代谢活性相关,提示肠道菌群的变化与冠心病的发生及发展机理有一定关系,肠道菌群失衡可能是促进冠心病发生的原因之一,肠道菌群对尿酸的代谢能力可能参与这一致病过程。
