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Celastrol attenuates oxidative stress in the skeletal muscle of diabetic rats by regulating the AMPK-PGC1α-SIRT3 signaling pathway

  • Authors:
    • Yue Guan
    • Zi-Jian Cui
    • Bei Sun
    • Li-Ping Han
    • Chun-Jun Li
    • Li-Ming Chen
  • View Affiliations / Copyright

    Affiliations: Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, P.R. China, Department of Spinal Surgery, Tianjin Union Medicine Center, Tianjin 300121, P.R. China
    Copyright: © Guan et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1229-1238
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    Published online on: April 5, 2016
       https://doi.org/10.3892/ijmm.2016.2549
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Abstract

Oxidative stress plays a key role in the pathogenesis of diabetic myopathy. Celastrol provides a wide range of health benefits, including antioxidant, anti-inflammatory and antitumor effects. We hypothesized that celastrol may exert an antioxidant effect in the skeletal muscle of diabetic rats. In the present study, MnSOD activity was determined by spectrophotometry. The protein levels were evaluated by western blot analysis and mRNA content was quantified by RT‑qPCR. We firstly found that the levels of AMP-activated protein kinase (AMPK), peroxisome proliferator-activated receptor coactivator 1α (PGC1α), silent mating-type information regulation 2 homolog 3 (Sirt3) and manganese superoxide dismutase (MnSOD) were all decreased in the skeletal muscle of diabetic patients. Male rats with diabetes were also treated with the vehicle or with celastrol at 1, 3 and 6 mg/kg/day for 8 weeks. The administration of celastrol at 3 and 6 mg/kg attenuated the deterioration of skeletal muscle, as shown by histological analysis, decreased the malondialdehyde (MDA) level and increased the glutathione (GSH) level assayed by enzyme-linked immunosorbent assay (ELISA) method. It also enhanced the enzyme activity and increased the expression of MnSOD, and increased the AMPK phosphorylation level, as well as PGC1α and Sirt3 expression. The findings of our study suggest that the expression of AMPK, PGC1α, Sirt3 and MnSOD are decreased in the skeletal muscle of diabetic patients. Celastrol exerted antioxidant effects on skeletal muscle partly by regulating the AMPK-PGC1α-Sirt3 signaling pathway.
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Copy and paste a formatted citation
Spandidos Publications style
Guan Y, Cui Z, Sun B, Han L, Li C and Chen L: Celastrol attenuates oxidative stress in the skeletal muscle of diabetic rats by regulating the AMPK-PGC1α-SIRT3 signaling pathway. Int J Mol Med 37: 1229-1238, 2016.
APA
Guan, Y., Cui, Z., Sun, B., Han, L., Li, C., & Chen, L. (2016). Celastrol attenuates oxidative stress in the skeletal muscle of diabetic rats by regulating the AMPK-PGC1α-SIRT3 signaling pathway. International Journal of Molecular Medicine, 37, 1229-1238. https://doi.org/10.3892/ijmm.2016.2549
MLA
Guan, Y., Cui, Z., Sun, B., Han, L., Li, C., Chen, L."Celastrol attenuates oxidative stress in the skeletal muscle of diabetic rats by regulating the AMPK-PGC1α-SIRT3 signaling pathway". International Journal of Molecular Medicine 37.5 (2016): 1229-1238.
Chicago
Guan, Y., Cui, Z., Sun, B., Han, L., Li, C., Chen, L."Celastrol attenuates oxidative stress in the skeletal muscle of diabetic rats by regulating the AMPK-PGC1α-SIRT3 signaling pathway". International Journal of Molecular Medicine 37, no. 5 (2016): 1229-1238. https://doi.org/10.3892/ijmm.2016.2549
Copy and paste a formatted citation
x
Spandidos Publications style
Guan Y, Cui Z, Sun B, Han L, Li C and Chen L: Celastrol attenuates oxidative stress in the skeletal muscle of diabetic rats by regulating the AMPK-PGC1α-SIRT3 signaling pathway. Int J Mol Med 37: 1229-1238, 2016.
APA
Guan, Y., Cui, Z., Sun, B., Han, L., Li, C., & Chen, L. (2016). Celastrol attenuates oxidative stress in the skeletal muscle of diabetic rats by regulating the AMPK-PGC1α-SIRT3 signaling pathway. International Journal of Molecular Medicine, 37, 1229-1238. https://doi.org/10.3892/ijmm.2016.2549
MLA
Guan, Y., Cui, Z., Sun, B., Han, L., Li, C., Chen, L."Celastrol attenuates oxidative stress in the skeletal muscle of diabetic rats by regulating the AMPK-PGC1α-SIRT3 signaling pathway". International Journal of Molecular Medicine 37.5 (2016): 1229-1238.
Chicago
Guan, Y., Cui, Z., Sun, B., Han, L., Li, C., Chen, L."Celastrol attenuates oxidative stress in the skeletal muscle of diabetic rats by regulating the AMPK-PGC1α-SIRT3 signaling pathway". International Journal of Molecular Medicine 37, no. 5 (2016): 1229-1238. https://doi.org/10.3892/ijmm.2016.2549
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