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Curative diet supplementation with a melon superoxide dismutase reduces adipose tissue in obese hamsters by improving insulin sensitivity
Author(s) -
Carillon Julie,
Knabe Lucie,
Montalban Anne,
Stévant Marie,
Keophiphath Mayoura,
Lacan Dominique,
Cristol JeanPaul,
Rouanet JeanMax
Publication year - 2014
Publication title -
molecular nutrition and food research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.495
H-Index - 131
eISSN - 1613-4133
pISSN - 1613-4125
DOI - 10.1002/mnfr.201300466
Subject(s) - adipose tissue , endocrinology , medicine , insulin resistance , lipolysis , white adipose tissue , oxidative stress , adipocyte , superoxide dismutase , insulin , biology
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.