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Licensed Unlicensed Requires Authentication Published by De Gruyter October 25, 2019

Swimming training by affecting the pancreatic Sirtuin1 (SIRT1) and oxidative stress, improves insulin sensitivity in diabetic male rats

Rafighe Ghiasi , Roya Naderi , Roghayeh Sheervalilou and Mohammad Reza Alipour EMAIL logo

Abstract

Background

Sirtuin1 is a regulator of oxidative stress involved in the management of diabetes complications. Due to the beneficial effects of swimming training in diabetes, this study aimed to investigate the effects of swimming training on pancreatic Sirtuin1, oxidative stress and metabolic parameters in type 2 diabetic male rats.

Materials and methods

Twenty-eight male Wistar rats (200–250 g) were randomly divided into four groups: control, diabetic, swim trained and swim trained diabetic rats (n = 7). Diabetes was induced by a high-fat diet and streptozotocin injection [35/kg intraperitoneally]. After 72 hours, animals with blood glucose levels ≥300 mg/dL were considered diabetic. Seven days after the induction of diabetes, animals in the exercise groups were subjected to swimming training (60 min/daily, 5 days/week) for 12 weeks. At the end of the intervention, the animals were anesthetized, and tissue/blood samples were prepared for measurements of metabolic parameters, albumin, the Sitruin1 gene and its protein expression levels, oxidative stress and histological study.

Results

This study indicated that the diabetic rats had a significant decrease (p < 0.01, p < 0.05) in pancreatic Sitruin1 gene and its protein expression levels, antioxidant enzymes, serum albumin, and the quantitative insulin sensitivity check index, but a significant increase (p < 0.01) in malondialdehyde level. Swimming training resulted in a considerable improvement (p < 0.01, p < 0.05) in pancreatic Sitruin1 gene and its protein expression levels, antioxidant enzymes, serum levels of albumin and metabolic parameters. In addition, histological findings indicated the beta-cells conservation.

Conclusions

This study suggested that pancreatic Sitruin1 may be a promising therapeutic target for diabetic complications.

Award Identifier / Grant number: 5/4/610

Funding statement: This study was financially supported by Liver and Gastrointestinal Diseases Research Center of Tabriz University of Medical Sciences (Project No: 5/4/610).

Author Statement

  1. Author contributions: All authors have contributed in different parts of the study.

  2. Conflict of interest: None.

  3. Informed consent: Not applicable.

  4. Ethical approval: This study was designed based on the protocol in accordance with the National Institutes of Health (NIH) Guide, for laboratory animal’s care.

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Received: 2019-03-17
Accepted: 2019-08-15
Published Online: 2019-10-25

© 2019 Walter de Gruyter GmbH, Berlin/Boston

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