The effects of polyphenol supplementation on adipose tissue morphology and gene expression in overweight and obese humans

J Most, I Warnke, MV Boekschoten, JWE Jocken… - Adipocyte, 2018 - Taylor & Francis
J Most, I Warnke, MV Boekschoten, JWE Jocken, P de Groot, A Friedel, I Bendik…
Adipocyte, 2018Taylor & Francis
Dietary polyphenols have beneficial effects on adipose tissue mass and function in rodents,
but human studies are scarce. In a randomized, placebo-controlled study, 25 (10 women)
overweight and obese humans received a combination of the polyphenols epigallocatechin-
gallate and resveratrol (282 mg/d, 80 mg/d, respectively, EGCG+ RES, n= 11) or placebo
(PLA, n= 14) supplementation for 12 weeks. Abdominal subcutaneous adipose tissue (SAT)
biopsies were collected for assessment of adipocyte morphology and micro-array analysis …
Abstract
Dietary polyphenols have beneficial effects on adipose tissue mass and function in rodents, but human studies are scarce. In a randomized, placebo-controlled study, 25 (10 women) overweight and obese humans received a combination of the polyphenols epigallocatechin-gallate and resveratrol (282 mg/d, 80 mg/d, respectively, EGCG+RES, n = 11) or placebo (PLA, n = 14) supplementation for 12 weeks. Abdominal subcutaneous adipose tissue (SAT) biopsies were collected for assessment of adipocyte morphology and micro-array analysis. EGCG+RES had no effects on adipocyte size and distribution compared with PLA. However, we identified pathways contributing to adipogenesis, cell cycle and apoptosis were significantly downregulated by EGCG+RES versus PLA. Furthermore, EGCG+RES significantly decreased expression of pathways related to energy metabolism, oxidative stress, inflammation, and immune defense as compared with PLA. In conclusion, the SAT gene expression profile indicates a reduced cell turnover after 12-week EGCG+RES in overweight-obese subjects. It remains to be elucidated whether these alterations translate into long-term metabolic effects.
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