RT Journal Article T1 Interplay between gonadal hormones and postnatal overfeeding in defining sex-dependent differences in gut microbiota architecture A1 Santos-Marcos, Jose A. A1 Barroso, Alexia A1 Rangel-Zuñiga, Oriol A. A1 Perdices-Lopez, Cecilia A1 Haro, Carmen A1 Sanchez-Garrido, Miguel A. A1 Molina-Abril, Helena A1 Ohlsson, Claes A1 Perez-Martinez, Pablo A1 Poutanen, Matti A1 Lopez-Miranda, Jose A1 Perez-Jimenez, Francisco A1 Tena-Sempere, Manuel A1 Camargo, Antonio K1 Gut microbiota K1 Sex steroids K1 Gender K1 Metabolism K1 miRNAs K1 Microbioma gastrointestinal K1 Identidad de género K1 Metabolismo K1 MicroARNs AB Aging is associated with a decline in sex hormones, variable between sexes, that has an impact on many different body systems and might contribute to age-related disease progression. We aimed to characterize the sex differences in gut microbiota, and to explore the impact of depletion of gonadal hormones, alone or combined with postnatal overfeeding, in rats. Many of the differences in the gut microbiota between sexes persisted after gonadectomy, but removal of gonadal hormones shaped several gut microbiota features towards a more deleterious profile, the effect being greater in females than in males, mainly when animals were concurrently overfed. Moreover, we identified several intestinal miRNAs as potential mediators of the impact of changes in gut microbiota on host organism physiology. Our study points out that gonadal hormones contribute to defining sex-dependent differences of gut microbiota, and discloses a potential role of gonadal hormones in shaping gut microbiota, as consequence of the interaction between sex and nutrition. Our data suggest that the changes in gut microbiota, observed in conditions of sex hormone decline, as those caused by ageing in men and menopause in women, might exert different effects on the host organism, which are putatively mediated by gut microbiota-intestinal miRNA cross-talk. PB Impact Journals YR 2020 FD 2020-10-27 LK http://hdl.handle.net/10668/3981 UL http://hdl.handle.net/10668/3981 LA en NO Santos-Marcos JA, Barroso A, Rangel-Zuñiga OA, Perdices-Lopez C, Haro C, Sanchez-Garrido MA, et al. Interplay between gonadal hormones and postnatal overfeeding in defining sex-dependent differences in gut microbiota architecture. Aging. 2020 Oct 27;12(20):19979-20000 DS RISalud RD Apr 12, 2025