Extensive weight loss reveals distinct gene expression changes in human subcutaneous and visceral adipose tissue
Journal article, 2015

Weight loss has been shown to significantly improve Adipose tissue (AT) function, however changes in AT gene expression profiles particularly in visceral AT (VAT) have not been systematically studied. Here, we tested the hypothesis that extensive weight loss in response to bariatric surgery (BS) causes AT gene expression changes, which may affect energy and lipid metabolism, inflammation and secretory function of AT. We assessed gene expression changes by whole genome expression chips in AT samples obtained from six morbidly obese individuals, who underwent a two step BS strategy with sleeve gastrectomy as initial and a Roux-en-Y gastric bypass as second step surgery after 12 +/- 2 months. Global gene expression differences in VAT and subcutaneous (S) AT were analyzed through the use of genome-scale metabolic model (GEM) for adipocytes. Significantly altered gene expressions were PCR-validated in 16 individuals, which also underwent a two-step surgery intervention. We found increased expression of cell death-inducing DFFA-like effector a (CIDEA), involved in formation of lipid droplets in both fat depots in response to significant weight loss. We observed that expression of the genes associated with metabolic reactions involved in NAD+, glutathione and branched chain amino acid metabolism are significantly increased in AT depots after surgery-induced weight loss.

Author

Adil Mardinoglu

Chalmers, Biology and Biological Engineering, Systems and Synthetic Biology

J. T. Heiker

Leipzig University

D. Gartner

Stadtischen Klinikum Karlsruhe

Elias Björnson

Chalmers, Biology and Biological Engineering, Systems and Synthetic Biology

M. R. Schon

Stadtischen Klinikum Karlsruhe

G. Flehmig

Leipzig University

N. Kloting

Junior Research Group 2 Animal models of obesity

K. Krohn

Universitatsklinikum Leipzig und Medizinische Fakultat

M. Fasshauer

Leipzig University

M. Stumvoll

Leipzig University

Jens B Nielsen

Chalmers, Biology and Biological Engineering, Systems and Synthetic Biology

M. Bluher

Leipzig University

Scientific Reports

2045-2322 (ISSN)

Vol. 5 14841- 14841

Metagenomics in Cardiometabolic Diseases (METACARDIS)

European Commission (FP7), 2012-11-01 -- 2017-10-31.

Areas of Advance

Life Science Engineering

Subject Categories

Bioinformatics and Systems Biology

DOI

10.1038/srep14841

More information

Latest update

3/5/2018 8