Molecular Nutrition

Effects of Polyethylene Glycosylation Porcine Glucagon-Like Peptide-2 on Gene Expression of Tight Junction Proteins and Inflammatory Cytokines in a Murine Model of Experimental Colitis

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  • Institute of Animal Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

Received date: 2014-04-28

  Online published: 2014-09-10

Abstract

This study aimed to evaluate the effects of polyethylene glycosylation (PEGylation) porcine glucagon-like peptide-2 (pGLP-2) (PEGylation pGLP-2) on gene expression of tight junction proteins and inflammatory cytokines in a murine model of experimental colitis. Twenty-four BALB/C mice were randomly assigned into four groups: dextran sulfate sodium (DSS, mice colitis model by drinking 3% DSS), DSS+pGLP-2 (3% DSS by drinking+pGLP-2 by intraperitoneal injection on the 8th day), DSS+PEG-pGLP-2 (3% DSS by drinking+PEG-pGLP-2 by intraperitoneal injection on the 8th day) and water groups for 10 days. The results showed as follows: compared with the water group, DSS significantly decreased the mRNA expression level of zonula occludens-1 (ZO-1) in colon (P<0.01). Specifically, PEG-pGLP-2, nor pGLP-2 injection (P>0.05) significantly increased the ZO-1 mRNA expression level compared with the DSS group (P<0.01). Compared with the water group, DSS group significantly increased the mRNA expression levels of interleukin-6 (IL-6), interleukin-10 (IL-10) and interferon-γ (INF-γ) in colon (P<0.01). And PEG-pGLP-2 and pGLP-2 injection significantly decreased the IL-6, IL-10 and INF-γ mRNA expression levels compared with the DSS group (P<0.01). These results show that PEG-pGLP-2 reduce the severity of colonic injury in murine colitis by increasing the expression of the tight junction proteins and reducing the expression of inflammatory cytokines. The therapy of PEG-pGLP-2 is better than that of pGLP-2.

Cite this article

QI Keke, WU Jie, XU Ziwei . Effects of Polyethylene Glycosylation Porcine Glucagon-Like Peptide-2 on Gene Expression of Tight Junction Proteins and Inflammatory Cytokines in a Murine Model of Experimental Colitis[J]. Chinese Journal of Animal Nutrition, 2014 , 26(9) : 2745 -2751 . DOI: 10.3969/j.issn.1006-267x.2014.09.037

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