Genomic and biochemical analysis reveals fermented product of a putative novel Romboutsia species involves the glycometabolism of tilapia
文献类型： 外文期刊
作者： Fan, Zijian 1 ; Ke, Xiaoli 1 ; Jiang, Lijin 1 ; Zhang, Ziyue 1 ; Yi, Mengmeng 1 ; Liu, Zhigang 1 ; Cao, Jianmeng 1 ; Lu, Maixin 1 ; Wang, Miao 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Key Lab Trop & Subtrop Fishery Resource Applicat &, Guangdong Prov Key Lab Aquat Anim Immunol & Sustai, Minist Agr & Rural Affairs,Pearl River Fisheries R, Guangzhou 510380, Guangdong, Peoples R China
2.Guangdong Lab Lingnan Modern Agr, Maoming Branch, Maoming 525000, Guangdong, Peoples R China
关键词： Romboutsia; tilapia; Carbohydrate; Gut microbiota; SCFAs
期刊名称：AQUACULTURE （ 影响因子：4.5； 五年影响因子：4.6 ）
ISSN： 0044-8486
年卷期： 2024 年 581 卷
页码：
收录情况： SCI
摘要： Fish have a restricted capacity to utilize carbohydrates. Gut microbiota contribute to carbohydrate degradation in the host. The connection between the intestinal microbiota and carbohydrate metabolism is not well known in fish. We found that when feed was transformed from zooplankton-based to plant-based diet, the population of genus Romboutsia in tilapia gut increased. We inferred that the abundance of the genus Romboutsia was positively correlated with dietary sugar levels. Then, a strain of genus Romboutsia was obtained and designated MY01. Strain MY01 was a novel species of Romboutsia based on its genomic analysis. Many genes involved in carbohydrate metabolism were found in its genome, including Carbohydrate Active enZymes (CAZymes) genes associated with dietary fiber fermentation. An increased quantity of short-chain fatty acids (SCFAs) and decreased quantity of carbohydrates in feed fermented with MY01 were revealed by GC-MS and HPLC analysis. Fermented feed with MY01 increased the insulin content and decreased the glucose content of tilapia serum. Our in vivo and in vitro results are the first to suggest that fermented feed with Romboutsia regulates the tilapia glycometabolism by producing SCFAs to stimulate insulin secretion, and by reducing carbohydrates content of feed simultaneously to decrease blood glucose eventually. In further, the study provides a potential source of SCFAs production.
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