Hypogonadal (Gnrh1hpg) mice reveal niche-specific influence of reproductive axis and sex on intestinal microbial communities
Sisk-Hackworth, L.; Brown, J.; Sau, L.; Levine, A. A.; Tam, L. Y. I.; Ramesh, A.; Shah, R. S.; Kelley-Thackray, E. T.; Wang, S.; Nguyen, A.; Kelley, S. T.; Thackray, V. G.
Show abstract
The gut microbiome has been linked to many diseases with sex bias including autoimmune, metabolic, neurological, and reproductive disorders. Numerous studies report sex differences in fecal microbial communities, but how this differentiation occurs remains unclear. Using a genetic hypogonadal mouse model that does not produce sex steroids or go through puberty, we investigated how sex and the reproductive axis impact bacterial diversity within the small and large intestine. Both sex and reproductive axis inactivation altered bacterial composition in an intestinal section and niche-specific manner. Our results also implicated factors independent of the reproductive axis (i.e., sex chromosomes) in shaping intestinal communities. Additionally, our detailed profile of intestinal communities showed that fecal samples do not reflect bacterial diversity in the small intestine. Our results have ramifications for studying the impact of sex differences on the gut microbiome, particularly in sex-biased diseases and factoring in sex and steroid levels in microbial-based therapies.
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