目的检测活动期溃疡性结肠炎(AUC)和缓解期溃疡性结肠炎(RUC)患者粪便菌群,观察其微生态学改变及双歧杆菌对溃疡性结肠炎(UC)的治疗作用,探讨UC的发病机制。方法选择2011年5月—2013年3月在井冈山大学附属医院门诊就诊或住院AUC患者64例...目的检测活动期溃疡性结肠炎(AUC)和缓解期溃疡性结肠炎(RUC)患者粪便菌群,观察其微生态学改变及双歧杆菌对溃疡性结肠炎(UC)的治疗作用,探讨UC的发病机制。方法选择2011年5月—2013年3月在井冈山大学附属医院门诊就诊或住院AUC患者64例(AUC组)和RUC患者71例(RUC组),另选择同期在本院体检健康者30例(对照组),收集其新鲜粪便,利用引物设计软件Primer Premier 5.0设计肠道菌群16SrDNA基因特异性PCR引物,分析肠道菌群变化。按照随机数字表法,将AUC组患者分为AUC1组32例和AUC2组32例,RUC组分为RUC1组36例和RUC2组35例;AUC1组和RUC1组患者口服诺氟沙星胶囊(氟哌酸胶囊),3粒/次,2次/d;AUC2组和RUC2组口服双歧杆菌活菌胶囊(丽珠肠乐胶囊),2粒/次,3次/d。4个亚组治疗疗程均为1个月,同时口服柳氮磺胺吡啶片,1.0 g/次,4次/d。检测各组受试者分泌型免疫球蛋白A(sIgA)含量和线粒体膜蛋白(Apo-2.7)含量。结果与对照组相比,AUC组和RUC组双歧杆菌、乳酸杆菌、拟杆菌、球形梭菌、柔嫩梭菌、普拉梭菌及总细菌菌落数减少(P<0.05),大肠埃希菌、肠球菌菌落数增加(P<0.05);与RUC组相比,AUC组双歧杆菌、乳酸杆菌菌落数减少(P<0.05),大肠埃希菌菌落数增加(P<0.05)。4个亚组患者在治疗过程中均未出现明显不良反应。AUC2组、RUC2组临床疗效和组织学疗效分别优于AUC1组、RUC1组(P<0.05);且治疗后AUC2组、RUC2组双歧杆菌、乳酸杆菌菌落数分别较AUC1组、RUC1组增加,大肠埃希菌菌落数分别较AUC1组、RUC1组减少(P<0.05)。对照组与AUC1组、RUC1组sIgA、Apo-2.7含量比较,差异均有统计学意义(P<0.05);AUC2组sIgA含量高于AUC1组,Apo-2.7含量低于AUC1组(P<0.05);RUC2组sIgA含量高于RUC1组,Apo-2.7含量低于RUC1组(P<0.05)。结论 UC患者肠道共生菌数量减少,条件致病菌数量增加,双歧杆菌活菌制剂治疗UC疗效显著,UC发病可能与机体菌群失调、肠道免疫功能�展开更多
AIM: To determine the anti-inflammatory activity of probiotic Bifidobacteria in Bifidobacteria-fermented milk (BFM) which is effective against active ulcerative colitis (UC) and exacerbations of UC, and to explore the...AIM: To determine the anti-inflammatory activity of probiotic Bifidobacteria in Bifidobacteria-fermented milk (BFM) which is effective against active ulcerative colitis (UC) and exacerbations of UC, and to explore the immunoregulatory mechanisms. METHODS: Peripheral blood mononuclear cells (PBMNC) from UC patients or HT-29 cells were co-cultured with heat-killed probiotic bacteria or culture supernatant of Bifidobacterium breve strain Yakult (BbrY) or Bifidobacterium bifidum strain Yakult (BbiY) to estimate the amount of IL-10 or IL-8 secreted. RESULTS: Both strains of probiotic Bifidobacteria contained in the BFM induced IL-10 production in PBMNC from UC patients, though BbrY was more effective than BbiY. Conditioned medium (CM) and DNA of both strains inhibited IL-8 secretion in HT-29 cells stimulated with TNF-α, whereas no such effect was observed with heat- killed bacteria. The inhibitory effect of CM derived from BbiY was greater than that of CM derived from BbrY. DNAs of the two strains had a comparable inhibitory activity against the secretion of IL-8. CM of BbiY induced a repression of IL-8 gene expression with a higher expression of IκB-ζ mRNA 4 h after culture of HT-29 cells compared to that in the absence of CM.CONCLUSION: Probiotic Bifidobacterium strains in BFM enhance IL-10 production in PBMNC and inhibit IL-8 secretion in intestinal epithelial cells, suggesting that BFM has anti-inflammatory effects against ulcerative colitis.展开更多
The pool of microbes inhabiting our body is known as “microbiota” and their collective genomes as “microbiome”. The colon is the most densely populated organ in the huma...The pool of microbes inhabiting our body is known as “microbiota” and their collective genomes as “microbiome”. The colon is the most densely populated organ in the human body, although other parts, such as the skin, vaginal mucosa, or respiratory tract, also harbour specific microbiota. This microbial community regulates some important metabolic and physiological functions of the host, and drives the maturation of the immune system in early life, contributing to its homeostasis during life. Alterations of the intestinal microbiota can occur by changes in composition (dysbiosis), function, or microbiota-host interactions and they can be directly correlated with several diseases. The only disease in which a clear causal role of a dysbiotic microbiota has been demonstrated is the case of Clostridium difficile infections. Nonetheless, alterations in composition and function of the microbiota have been associated with several gastrointestinal diseases (inflammatory bowel disease, colorectal cancer, or irritable bowel syndrome), as well as extra-intestinal pathologies, such as those affecting the liver, or the respiratory tract (e.g., allergy, bronchial asthma, and cystic fibrosis), among others. Species of Bifidobacterium genus are the normal inhabitants of a healthy human gut and alterations in number and composition of their populations is one of the most frequent features present in these diseases. The use of probiotics, including bifidobacteria strains, in preventive medicine to maintain a healthy intestinal function is well documented. Probiotics are also proposed as therapeutic agents for gastrointestinal disorders and other pathologies. The World Gastroenterology Organization recently published potential clinical applications for several probiotic formulations, in which species of lactobacilli are predominant. This review is focused on probiotic preparations containing Bifidobacterium strains, alone or in combination with other bacteria, which have been tested in human clinical 展开更多
文摘目的检测活动期溃疡性结肠炎(AUC)和缓解期溃疡性结肠炎(RUC)患者粪便菌群,观察其微生态学改变及双歧杆菌对溃疡性结肠炎(UC)的治疗作用,探讨UC的发病机制。方法选择2011年5月—2013年3月在井冈山大学附属医院门诊就诊或住院AUC患者64例(AUC组)和RUC患者71例(RUC组),另选择同期在本院体检健康者30例(对照组),收集其新鲜粪便,利用引物设计软件Primer Premier 5.0设计肠道菌群16SrDNA基因特异性PCR引物,分析肠道菌群变化。按照随机数字表法,将AUC组患者分为AUC1组32例和AUC2组32例,RUC组分为RUC1组36例和RUC2组35例;AUC1组和RUC1组患者口服诺氟沙星胶囊(氟哌酸胶囊),3粒/次,2次/d;AUC2组和RUC2组口服双歧杆菌活菌胶囊(丽珠肠乐胶囊),2粒/次,3次/d。4个亚组治疗疗程均为1个月,同时口服柳氮磺胺吡啶片,1.0 g/次,4次/d。检测各组受试者分泌型免疫球蛋白A(sIgA)含量和线粒体膜蛋白(Apo-2.7)含量。结果与对照组相比,AUC组和RUC组双歧杆菌、乳酸杆菌、拟杆菌、球形梭菌、柔嫩梭菌、普拉梭菌及总细菌菌落数减少(P<0.05),大肠埃希菌、肠球菌菌落数增加(P<0.05);与RUC组相比,AUC组双歧杆菌、乳酸杆菌菌落数减少(P<0.05),大肠埃希菌菌落数增加(P<0.05)。4个亚组患者在治疗过程中均未出现明显不良反应。AUC2组、RUC2组临床疗效和组织学疗效分别优于AUC1组、RUC1组(P<0.05);且治疗后AUC2组、RUC2组双歧杆菌、乳酸杆菌菌落数分别较AUC1组、RUC1组增加,大肠埃希菌菌落数分别较AUC1组、RUC1组减少(P<0.05)。对照组与AUC1组、RUC1组sIgA、Apo-2.7含量比较,差异均有统计学意义(P<0.05);AUC2组sIgA含量高于AUC1组,Apo-2.7含量低于AUC1组(P<0.05);RUC2组sIgA含量高于RUC1组,Apo-2.7含量低于RUC1组(P<0.05)。结论 UC患者肠道共生菌数量减少,条件致病菌数量增加,双歧杆菌活菌制剂治疗UC疗效显著,UC发病可能与机体菌群失调、肠道免疫功能�
文摘AIM: To determine the anti-inflammatory activity of probiotic Bifidobacteria in Bifidobacteria-fermented milk (BFM) which is effective against active ulcerative colitis (UC) and exacerbations of UC, and to explore the immunoregulatory mechanisms. METHODS: Peripheral blood mononuclear cells (PBMNC) from UC patients or HT-29 cells were co-cultured with heat-killed probiotic bacteria or culture supernatant of Bifidobacterium breve strain Yakult (BbrY) or Bifidobacterium bifidum strain Yakult (BbiY) to estimate the amount of IL-10 or IL-8 secreted. RESULTS: Both strains of probiotic Bifidobacteria contained in the BFM induced IL-10 production in PBMNC from UC patients, though BbrY was more effective than BbiY. Conditioned medium (CM) and DNA of both strains inhibited IL-8 secretion in HT-29 cells stimulated with TNF-α, whereas no such effect was observed with heat- killed bacteria. The inhibitory effect of CM derived from BbiY was greater than that of CM derived from BbrY. DNAs of the two strains had a comparable inhibitory activity against the secretion of IL-8. CM of BbiY induced a repression of IL-8 gene expression with a higher expression of IκB-ζ mRNA 4 h after culture of HT-29 cells compared to that in the absence of CM.CONCLUSION: Probiotic Bifidobacterium strains in BFM enhance IL-10 production in PBMNC and inhibit IL-8 secretion in intestinal epithelial cells, suggesting that BFM has anti-inflammatory effects against ulcerative colitis.
基金Supported by The Spanish Ministry of Economy and Competitiveness and by FEDER European Union funds,projects No.AGL2010-14952,No.AGL2010-16525 and No.AGL2012-33278
文摘The pool of microbes inhabiting our body is known as “microbiota” and their collective genomes as “microbiome”. The colon is the most densely populated organ in the human body, although other parts, such as the skin, vaginal mucosa, or respiratory tract, also harbour specific microbiota. This microbial community regulates some important metabolic and physiological functions of the host, and drives the maturation of the immune system in early life, contributing to its homeostasis during life. Alterations of the intestinal microbiota can occur by changes in composition (dysbiosis), function, or microbiota-host interactions and they can be directly correlated with several diseases. The only disease in which a clear causal role of a dysbiotic microbiota has been demonstrated is the case of Clostridium difficile infections. Nonetheless, alterations in composition and function of the microbiota have been associated with several gastrointestinal diseases (inflammatory bowel disease, colorectal cancer, or irritable bowel syndrome), as well as extra-intestinal pathologies, such as those affecting the liver, or the respiratory tract (e.g., allergy, bronchial asthma, and cystic fibrosis), among others. Species of Bifidobacterium genus are the normal inhabitants of a healthy human gut and alterations in number and composition of their populations is one of the most frequent features present in these diseases. The use of probiotics, including bifidobacteria strains, in preventive medicine to maintain a healthy intestinal function is well documented. Probiotics are also proposed as therapeutic agents for gastrointestinal disorders and other pathologies. The World Gastroenterology Organization recently published potential clinical applications for several probiotic formulations, in which species of lactobacilli are predominant. This review is focused on probiotic preparations containing Bifidobacterium strains, alone or in combination with other bacteria, which have been tested in human clinical
