Abnormal expressions of AGEs, TGF-beta 1, BDNF and their receptors in diabetic rat colon-Associations with colonic morphometric and biomechanical remodeling

作者：Sha, Hong; Tong, Xiaolin; Zhao, Jingbo^*

来源：Scientific Reports, 2018, 8(1): 9437.

DOI：10.1038/s41598-018-27787-2

• GLYCATION END-PRODUCTS
• NEUROTROPHIC FACTOR BDNF
• GROWTH-FACTOR-BETA
• GASTROINTESTINAL COMPLICATIONS
• EXTRACELLULAR-MATRIX
• PI3K/AKT PATHWAY
• CHINESE PATIENTS
• ENTERIC NEURONS
• MESANGIAL CELLS
• SMALL-INTESTINE

Present study aims to investigate the role of AGEs, TGF-beta 1, BDNF and their receptors on diabetes-induced colon remodeling. Diabetes was induced by a single tail vein injection 40 mg/kg of STZ. The parameters of morphometric and biomechanical properties of colonic segments were obtained from diabetic and normal rats. The expressions of AGE, RAGE, TGF-beta 1, TGF-beta 1 receptor, BDNF and TrkB were immunohistochemically detected in different layers of the colon. The expressions of AGE, RAGE, TGF-beta 1 and TGF-beta 1 receptor were increased whereas BDNF and TrkB were decreased in the diabetic colon (P < 0.05, P < 0.01). AGE, RAGE and TGF-beta 1 receptor expressions were positively correlated whereas the BDNF expression was negatively correlated with most of the morphometry and biomechanical parameters (P < 0.05, P < 0.01, P < 0.001). AGE, TGF-beta 1 and BDNF in different layers correlated with their receptors RAGE, TGF-beta 1 receptor and TrkB respectively. STZ-induced diabetes up-regulated the expression of AGE, RAGE, TGF-beta 1 and TGF-beta 1 receptors and down-regulated BDNF and TrkB in different layers of diabetic colon mainly due to hyperglycemia. Such changes maybe important for diabetes-induced colon remodeling, however it is needed to further perform mechanistic experiments in order to study causality or approaches that explain the relevance of the molecular pathways.

• 出版日期2018-6-21
• 单位中国中医科学院; 中国中医科学院广安门医院; 中日友好医院