Abstract
Age-related changes in human gut microbiota composition have been reported, and such changes might be influenced by the intake of nutrients or diets. To investigate the effects of aging on the gut microbiota independent of nutrient effects, we analyzed the gut microbiomes of 126 micro-pigs at a wide range of ages from newborns to 10 years old. The micro-pigs were reared in a constantly controlled environment. The diversity of the gut microbiome was found to continuously change with age. We also found associations between age and specific members and functions of the gut microbiome. Consistent with previous studies on the human gut microbiome, beneficial microbes including probiotic bacteria and short-chain fatty acid-producers decreased in older pigs, whereas Bacteroides increased with age. Based on the correlation network, Bacteroides seemed to have an important role in determining the relative abundances of other beneficial microbes. Our results suggest that maintaining beneficial gut microbes at a specific ratio corresponding to a certain age might contribute to a younger gut microbiome-age. Furthermore, due to similarities with the human system, micro-pigs are a useful animal model to elucidate the links between aging and the microbiome.
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This research was supported by Main Research Program (E0170601-03) of the Korea Food Research Institute funded by the Ministry of Science and ICT.
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Procedures in this study were conducted in compliance with and approval of Korean laws and MK Institutional Animal Care and Use Committee (MK-IACUC) regarding the use of experimental animals.
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Lim, M.Y., Song, EJ., Kang, K.S. et al. Age-related compositional and functional changes in micro-pig gut microbiome. GeroScience 41, 935–944 (2019). https://doi.org/10.1007/s11357-019-00121-y
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DOI: https://doi.org/10.1007/s11357-019-00121-y