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Association of body mass index and intestinal (faecal) Streptococcus in adults in Xining city, China P.R.

In: Beneficial Microbes
Authors:
M. Ma Department of endocrinology, the Fifth People’s Hospital of Qinghai Province (Qinghai Tumor Hospital), Xining, China P.R.

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J. Su Department of Gastroenterology and Hepatology, Erasmus MC – University Medical Center Rotterdam, P.O. Box 2040, 3000 CA, Rotterdam, the Netherlands.
Department of Basic Medicine, Medical School, Kunming University of Science and Technology, Kunming, 650500, China P.R.

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Y. Wang China-Malaysia National Joint Laboratory, Biomedical Research Center, Northwest Minzu University, Lanzhou, 730030, China P.R.

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L. Wang Department of endocrinology, the Fifth People’s Hospital of Qinghai Province (Qinghai Tumor Hospital), Xining, China P.R.

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Y. Li Department of endocrinology, the Fifth People’s Hospital of Qinghai Province (Qinghai Tumor Hospital), Xining, China P.R.

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G. Ding China-Malaysia National Joint Laboratory, Biomedical Research Center, Northwest Minzu University, Lanzhou, 730030, China P.R.

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Z. Ma China-Malaysia National Joint Laboratory, Biomedical Research Center, Northwest Minzu University, Lanzhou, 730030, China P.R.

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M.P. Peppelenbosch Department of Gastroenterology and Hepatology, Erasmus MC – University Medical Center Rotterdam, P.O. Box 2040, 3000 CA, Rotterdam, the Netherlands.

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Body mass index (BMI) and gut microbiota show significant interaction, but most studies on the relationship between BMI and gut microbiota have been done in Western countries. Relationships that are also identified in other cultural backgrounds are likely to have functional importance. Hence here we explore gut microbiota in adults living in Xining city (China P.R.) and relate results to subject BMI. Analysis of bacterial 16s rRNA gene was performed on faecal samples from participants with normal-weight (n=24), overweight (n=24), obesity (n=11) and type 2 diabetes (T2D) (n=8). The results show that unweighted but not weighted Unifrac distance was significantly different when gut microbiota composition was compared between the groups. Importantly, the genus Streptococcus was remarkably decreased in both obese subjects and subjects suffering from T2D, as compared to normal-weight subjects. Accordingly, strong association was identified between the genus Streptococcus and BMI and especially Streptococcus salivarius subsp. thermophiles was a major contributor in this respect. As previous studies have shown that Streptococcus salivarius subsp. thermophiles is also negatively associated with obesity in Western cohorts, our results suggest that this species is a potential probiotic for the prevention of obesity and related disorders.

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