Curative diet supplementation with a melon superoxide dismutase reduces adipose tissue in obese hamsters by improving insulin sensitivity

Mol Nutr Food Res. 2014 Apr;58(4):842-50. doi: 10.1002/mnfr.201300466. Epub 2013 Nov 20.


Scope: Obesity-related metabolic syndrome is often associated with a decrease of insulin sensitivity, inducing several modifications. However, dietary antioxidants could prevent insulin resistance. We have previously shown the preventive effects of a melon superoxide dismutase (SOD) in obese hamsters. However, its antioxidant effects have never been studied on adipose tissue.

Methods and results: We evaluated the effects of a 1-month curative supplementation with SODB on the adipose tissue of obese hamsters. Animals received either a standard diet or a cafeteria diet for 15 wk. Cafeteria diet induced obesity and related disorders, including insulin resistance and oxidative stress, in the abdominal adipose tissue. After SODB supplementation, the adipose tissue weight was decreased, probably by activating adipocytes lipolysis and thus reducing their size. SODB treatment also resulted in abdominal adipose tissue fibrosis reduction. Finally, SODB administration increased the expression of endogenous antioxidant enzymes and thus reduced oxidative stress and insulin resistance. The improvement of insulin sensitivity observed after SODB treatment could explain adipocyte lipolysis activation and fibrosis reduction.

Conclusion: These findings demonstrate that a dietary SOD supplementation could be a useful strategy against obesity-related modifications in adipose tissue.

Keywords: Adipocyte; Endogenous antioxidant defence; Insulin resistance; Lipolysis; Oxidative stress.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adipocytes / drug effects
  • Adipose Tissue / drug effects*
  • Adipose Tissue / metabolism
  • Animals
  • Antioxidants / pharmacology
  • Body Weight / drug effects
  • Catalase / metabolism
  • Cucurbitaceae / enzymology*
  • Dietary Supplements
  • Glutathione Peroxidase / metabolism
  • Insulin Resistance
  • Lipolysis / drug effects
  • Male
  • Mesocricetus
  • Obesity / diet therapy*
  • Obesity / metabolism
  • Oxidative Stress / drug effects
  • Superoxide Dismutase / metabolism
  • Superoxide Dismutase / pharmacology*
  • Superoxides / metabolism


  • Antioxidants
  • Superoxides
  • Catalase
  • Glutathione Peroxidase
  • Superoxide Dismutase