Abstract
The purpose of the study was to observe changes in endoplasmic reticulum stress (ERS)- and autophagy-related proteins in gastric smooth muscle tissues of diabetic rats with gastroparesis, investigate the effect of insulin-like growth factor 1 (IGF-1) on ERS and autophagy in rat gastric smooth muscle cells cultured under different glucose concentrations, and explore the influence of IGF-1 on development of diabetic gastroparesis (DGP). After establishing a rat model of DGP, rats were divided into normal control (NC) and 6-week diabetic model (DM6W) groups. Expression of ERS-related and autophagy-related proteins was detected by western blot analysis and immunofluorescence assay in rat gastric smooth muscle tissue and in vitro-cultured rat gastric smooth muscle cells exposed to different glucose concentrations and treatment with IGF-1 for 24 or 48 h. Changes in glucose-regulated-protein-78 (GRP78), growth arrest and DNA damage-inducible gene 153 (CHOP), and microtubule-associated protein 1A/1B light chain 3B (LC3) expression levels were detected by western blot analysis, and GRP78 and LC3 expression were examined by confocal laser-scanning microscopy. In vivo expression levels of GRP78, CHOP, and LC3 were significantly higher in ...Continue Reading
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