News Release

酵母菌会给炎性肠病惹麻烦

Peer-Reviewed Publication

American Association for the Advancement of Science (AAAS)

Yeast Brew Trouble for Inflammatory Bowel Disorders

image: Mice colonized with S. cerevisiae yeast (center) suffered more severe intestinal damage due to inflammatory bowel disease compared to uncolonized control animals (left) or animals colonized with a different strain of yeast. view more 

Credit: T.R. Chiaro <i>et al., Science Translational Medicine</i> (2017)

据一项新的研究报告称,存在于肠道中的一种酵母菌可能会加剧克隆氏病(Crohn’s Disease),而阻断该真菌在肠道中引起问题可令某些炎性肠病患者的症状减轻。目前大约有160万名美国人罹患炎性肠病(IBD),每年新诊断的病例多达7万人。尽管许多患者用抗炎药物来控制症状,但IBD无法治愈。尽管有若干研究阐明了肠道细菌与IBD之间的瓜葛,但对其它肠道微生物与IBD的关系则鲜有关注,尽管有近七成的克隆氏病(CD)患者往往会对酵母菌发起免疫反应。在这里,Tyson Chiaro和同事证明,一种酿酒酵母(Saccharomyces cerevisiae)会在小鼠的结肠炎模型中加重肠道损伤。研究人员确定,该种酵母菌会在啮齿动物体内导致肠道中尿酸量生成增加。他们给肠道中定植该酵母菌的小鼠别嘌呤醇(这是减少尿酸生成的一种临床用药)后,其肠道症状被逆转。为了确定酵母菌是否也能在人体内产生类似作用,科学家们对采自168名健康志愿者的血清进行了检查;他们观察到,在尿酸浓度和酿酒酵母(S. cerevisiae)循环抗体间存在着正相关。作者说,检测CD患者的尿酸和对酵母菌的免疫反应或能对更具针对性的靶向干预治疗提供资讯。

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