title: Effects of PEGylated porcine glucagon-like peptide-2 therapy in weaning piglets challenged with lipopolysaccharide.
abstract: This study aims to evaluate the therapeutic effect of polyethylene glycosylated porcine glucagon-like peptide-2 (pGLP-2), a long-acting form of pGLP-2, in lipopolysaccharide (LPS)-challenged piglets. Eighteen 21-day-old weaning piglets were randomly assigned into three groups: control (saline solution), LPS (100 μg/kg LPS), and PEG-pGLP-2 (10 nmol/kg PEG-pGLP-2+100 μg/kg LPS). All treatments were administered intraperitoneally. Compared with the control treatment, LPS treatment significantly decreased (P<0.05) the villus heights of the duodenum and jejunum, as well as the villus height/crypt depth ratio of the jejunum. However, PEG-pGLP-2 therapy reduced these effects (P>0.05). Specifically, PEG-pGLP-2 infusion significantly increased the villus height/crypt depth ratio of the duodenum (P<0.05) compared with LPS treatment. Compared with the control treatment, LPS treatment significantly increased (P<0.05) the mRNA expression levels of interferon-γ (IFN-γ) and tumor necrosis factor-α (TNF-α) in the jejunum. However, PEG-pGLP-2 therapy reduced these effects (P<0.05). Specifically, PEG-pGLP-2 infusion significantly decreased (P<0.05) the mRNA expression levels of interleukin (IL)-8 and TNF-α in the duodenum and jejunum, IL-10 in the duodenum, and IFN-γ in the jejunum compared with the LPS treatment. LPS treatment increased the caspase-3 activity of the ileum mucosal (P<0.05), and this effect was significantly reduced by PEG-pGLP-2 treatment. These results indicate that PEG-pGLP-2 infusion alleviates the severity of intestinal injury in weaning piglets by reducing the secretion of inflammatory cytokines and the caspase-3 activity, and increasing the villus height/crypt depth ratio.
authors.affiliation: Institute of Animal Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, People's Republic of China.
authors.forename: Ke-ke
authors.initials: KK
authors.lastname: Qi
authors.affiliation: Institute of Animal Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, People's Republic of China.
authors.forename: Jie
authors.initials: J
authors.lastname: Wu
authors.affiliation: Institute of Animal Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, People's Republic of China. Electronic address: zjsnkyxzw@163.com.
authors.forename: Zi-wei
authors.initials: ZW
authors.lastname: Xu
mesh_terms: D000818:Animals; D053767:Glucagon-Like Peptide 2 / Q000494:pharmacology*; D007371:Interferon-gamma / Q000378:metabolism; D016209:Interleukin-8 / Q000378:metabolism; D007583:Jejunum / Q000378:metabolism* / Q000473:pathology; D008070:Lipopolysaccharides / Q000633:toxicity*; D011092:Polyethylene Glycols / Q000494:pharmacology*; D013552:Swine; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism; D014886:Weaning
chemical_list: D053767:Glucagon-Like Peptide 2; D016209:Interleukin-8; D008070:Lipopolysaccharides; D014409:Tumor Necrosis Factor-alpha; D011092:Polyethylene Glycols; D007371:Interferon-gamma
keywords: Caspase-3; Inflammatory cytokines; PEGylated; Piglet; Porcine glucagon-like peptide-2; Tight junction protein