4.7 Article

12α-Hydroxylated bile acid enhances accumulation of adiponectin and immunoglobulin A in the rat ileum

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SCIENTIFIC REPORTS
卷 11, 期 1, 页码 -

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NATURE RESEARCH
DOI: 10.1038/s41598-021-92302-z

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  1. JSPS KAKENHI [16K14917, 19H2900]
  2. JST COI Grant [JPMJCE1301]
  3. Grants-in-Aid for Scientific Research [16K14917] Funding Source: KAKEN

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Dietary supplementation with cholic acid reduces plasma adiponectin concentration and influences the distribution of adiponectin in the body, as well as the concentration of mucosal immunoglobulin A in the intestine of rats. This study suggests that 12 alpha OH BAs may modulate mucosal immune responses that are involved in the accumulation of adiponectin in the ileum.
We previously reported that dietary supplementation with cholic acid (CA), the primary 12 alpha -hydroxylated (12 alpha OH) bile acid (BA), reduces plasma adiponectin concentration in rats. The aim of this study was to examine the distribution of adiponectin in the body of CA-fed rats and its influence on mucosal immunoglobulin A concentration in the intestine. Rats were fed a diet supplemented with or without CA (0.5 g CA/kg diet) for 13 weeks. A reduction in plasma adiponectin level was observed from week 3. At the end of the experiment, the CA diet reduced plasma adiponectin concentration both in the portal and aortic plasma. Accumulation of adiponectin was accompanied by an increase in cadherin-13 mRNA expression in the ileal mucosa of CA-fed rats. No increase was observed in adiponectin mRNA expression in the ileal and adipose tissues of the CA-fed rats. Immunoglobulin A concentration in the ileal mucosa was elevated in the CA-fed rats and was correlated with the ileal adiponectin concentration. 12 alpha OH BAs may modulate mucosal immune response that are involved in the accumulation of adiponectin in the ileum.

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