May 13, 2020

Cooperative effects of galanin and leptin on alleviation of insulin resistance in adipose tissue of diabetic rats

Journal of Cellular and Molecular Medicine
Bu LeShen Qu

Abstract

It was reported that either orexigenic neuropeptide galanin or anorexigenic hormone leptin caught benefit insulin sensitivity through increasing the translocation of glucose transporter 4 (GLUT4) in patients with diabetes. To date, it is unknown whether galanin can potentiate the effect of leptin on alleviation of insulin resistance. Therefore, in the current study we sought to assess the combined effect of central leptin and galanin on insulin resistance in the adipose tissues of type 2 diabetic rats. Galanin and leptin were injected into the intracerebroventricle of the diabetic rats, respectively, or cooperatively once a day for 2 weeks. Then, several indexes of insulin resistance were examined. The results showed that glucose infusion rates in the hyperinsulinaemic-euglycaemic clamp test, plasma adiponectin content and GLUT4 translocation, as well as Akt phosphorylation in fat cells, were higher, not GLUT4 protein and GLUT4 mRNA expression, but HOMA index was lower in the galanin + leptin group than either one of them. Furthermore, treatment with MK-2206, an Akt inhibitor, blocked the combined effects of galanin + leptin on alleviation of insulin resistance. These results suggest that galanin can improve the leptin-induced ...Continue Reading

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Mentioned in this Paper

Study
Diabetes
Infusion Procedures
Galanin-A
Protein Translocation
Proto-Oncogene Proteins c-akt
Adipose Tissue
Glucose Transport
Glucose
Homeostasis Model Assessment: Arbitrary Concentration: Point in Time: Serum/Plasma: Quantitative

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