Changes of porcine gut microbiota in response to dietary chlorogenic acid supplementation
Chlorogenic acids (CGA), the most abundant natural polyphenol present in human diet and plants, have attracted considerable research interest because of their broad bioactivities including the antimicrobial activity. However, little is known about their influences on intestinal bacterial communities. Here, we described a response in intestinal microbiome to CGA using a porcine model. Twenty-four weaned pigs were allotted to two groups and fed with a basal diet or a basal diet containing 1000 mg/kg CGA. Results showed that CGA significantly increased the length of the small intestine (P < 0.05) and enhanced the activity of diamine oxidase (DAO) and the concentration of MHC-II in the jejunal and ileal mucosa (P < 0.05). Moreover, the acetate concentration in ileum and cecum digesta, and the propionate and butyrate concentrations in the cecum digesta, were significantly elevated by CGA (P < 0.05). Interestingly, CGA significantly increased the total 16S rRNA gene copies and bacterial alpha diversity in the cecum (P < 0.05). The relative abundance of bacteria from phyla Firmicutes and Bacteroidetes was increased in the cecum digesta (P < 0.05), whereas the abundance of bacteria from phylum Protebacteria was decreased by CGA (P < 0.05). Importantly, pigs on CGA-containing diet had higher abundance of Lactobacillus spp., Prevotella spp., Anaerovibrio spp., and Alloprevotella spp. in the cecum (P < 0.05). Not only did our study suggest a synergic response of intestinal barrier function and microbiota to the CGA, but the result will also contribute to understanding of the mechanisms behind the CGA-modulated gut health.
KeywordsChlorogenic acid Microbiota Gut Health Weaned pigs
This study was supported by the key Research and Development program of Sichuan Province (2018NZDZX0005) and the Youth Innovation teams of Animal Feed Biotechnology of Sichuan Province (2016TD0028).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.
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