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[Progress of researches on mechanisms of acupuncture therapy for insulin resistance].

Insulin resistance (IR) is a common pathophysiological basis of many chronic diseases, such as obesity, type 2 diabetes mellitus (T2DM), nonalcoholic fatty liver disease, cerebral vascular disease, cardiovascular and neurodegenerative diseases, etc. Acupuncture therapy has been demonstrated to have a positive role in reducing IR level in clinical practice. In the present paper, we summarized development of researches on the mechanism of acupuncture therapy underlying improvement of IR in recent 10 years from 1) regulating expression of hypothalamic phosphatidylinositol-3-kinase (PI3K)-p85 and PI3K-P110 proteins in obesity rats; 2) regulating the levels of some related proteins of insulin target tissues (liver and skeletal muscle), such as insulin receptor substrate-1 (IRS)-1 and -2, glucose transporter mRNAs and proteins, sterol regulatory element-binding protein 1 (SREBP-1) and fatty acid synthetase proteins; 3) suppressing inflammatory reaction of liver tissue and down-regulating serum adiponectin in T2DM rats; 4) raising the activity of superoxide dismutase (SOD) and reducing the levels of reactive oxygen species, and malondialdehyde (MDA) contents of quadriceps femoris in spontaneous IR rats; and 5) attenuating structural injury of pancreas islet and apoptosis of pancreatic β cells in diabetes rats. Multi-levels and various systems of the neuro-endocrine-immune networks are involved in the actions of acupuncture in the improvement of IR. In the future, more attention should be paid to the study on the acupoint specificity, suitable acupoint combinations and stimulus parameters in clinical treatment of IR related various metabolic diseases, further optimizing clinical treatment protocols.