ArticleIndian journal of pharmacology
The effect of Chinese medicine Pu-Ren-Dan on pancreatic angiogenesis in high fat diet/streptozotocin-induced diabetic rats.
Article in Indian journal of pharmacology. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors at 1 institution in 1 country.
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Abstract
objectivesThe islet vascular system is critical for β-cell function. This study investigated the antidiabetic effect of the Chinese Pu-Ren-Dan (PRD) recipe by regulating the pancreatic angiogenic factors in T2DM rats. MATERIALS
methodsHigh fat diet/streptozotocin-induced obese type-2 diabetes mellitus rats were developed and treated with PRD for 4 weeks. Then glucolipid metabolism, insulin secretion, pancreatic blood flow, ultrastructure of islet β-cell, histological changes of islet and protein expressions of pancreatic angiogenic factors were investigated.
resultsPRD-reduced T2DM rats' body weight and blood glucose level resisted the lipid metabolism disturbance, and ameliorated the insulin resistance and β-cell function. In addition, the histological and morphological studies proved that PRD could maintain the normal distribution of endocrine cell in islet and normal ultrastructure of β cell. An increased pancreatic blood flow was observed after the PRD treatment. In the investigation of pancreatic angiogenic factors, PRD inhibited the decreased expression of VEGF and Ang-1, and reversed the reduction of VEGFR2 and Tie2 phosphorylation in T2DM rats; the Ang-2 and TGFβ expression were up-regulated by PRD while PKC was activated; endostatin and angiostatin were down-regulated by PRD.
conclusionsThe results suggest that increasing VEGF expression, regulating VEGF/VEGFR2 signaling, stimulating Ang-1/Tie-2 signaling pathway, and inhibiting PKC-TGFβ signaling and antiangiogenic factors might be the underlying mechanism of PRD's antidiabetic effect.
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