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Erschienen in: The journal of nutrition, health & aging 6/2018

19.03.2018

Glucagon-Like Peptide-2 Improve Intestinal Mucosal Barrier Function in Aged Rats

verfasst von: Weiying Ren, Jiayu Wu, Li Li, Y. Lu, Y. Shao, Y. Qi, B. Xu, Y. He, Yu Hu

Erschienen in: The journal of nutrition, health & aging | Ausgabe 6/2018

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Abstract

Glucagon-like peptide-2 (GLP-2) plays a major role in repairing impaired intestinal mucosa, but its mechanism in the improvement of intestinal barrier function during the aging process remains unclear. In this study, 26-month-old male Sprague-Dawley rats were randomized to control group and GLP-2 group treated with a dose of 250 μg•kg-1•d-1 by intraperitoneal injection. After 14 days of treatment, intestinal mucosal morphometric changes were observed by light microscopy and transmission electron microscopy (TEM). Small intestinal permeability was evaluated by fluorescein isothiocyanate (FITC)-labeled dextran. The mRNA and protein expression of Zonula Occludens-1 (ZO-1), occludin, claudin-1 and the GLP-2 receptor (GLP-2R) were detected by Real-time PCR and Western blot. Our results showed that GLP-2 administration significantly improved the age-related atrophy of intestinal mucosa and villi and increased small intestinal permeability. The mRNA and protein expression of ZO-1and occludin in ileum were up regulated in the GLP-2-treated old rats. In addition, the serum GLP-2 levels were negatively correlated with small intestinal permeability measured by FITC-dextran levels (r=-0.610, P<0.01). Taking all these data together, it is concluded that GLP-2 improved small intestinal epithelial barrier function in aged rats mainly by facilitating intestinal mucosa growth, alleviating the increased small intestinal permeability and increasing ZO-1 and occludin expression. Our observations provide evidence for the clinical significance of GLP-2 in preventing the intestinal epithelial barrier dysfunction during aging.
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Metadaten
Titel
Glucagon-Like Peptide-2 Improve Intestinal Mucosal Barrier Function in Aged Rats
verfasst von
Weiying Ren
Jiayu Wu
Li Li
Y. Lu
Y. Shao
Y. Qi
B. Xu
Y. He
Yu Hu
Publikationsdatum
19.03.2018
Verlag
Springer Paris
Erschienen in
The journal of nutrition, health & aging / Ausgabe 6/2018
Print ISSN: 1279-7707
Elektronische ISSN: 1760-4788
DOI
https://doi.org/10.1007/s12603-018-1022-8

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