Biomaterial Database

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

Adil Mardinoglu, and John T Heiker, and Daniel Gärtner, and Elias Björnson, and Michael R Schön, and Gesine Flehmig, and Nora Klöting, and Knut Krohn, and Mathias Fasshauer, and Michael Stumvoll, and Jens Nielsen, and Matthias Blüher

Department of Biology and Biological Engineering, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden.

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.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D009767	Obesity, Morbid	The condition of weighing two, three, or more times the ideal weight, so called because it is associated with many serious and life-threatening disorders. In the BODY MASS INDEX, morbid obesity is defined as having a BMI greater than 40.0 kg/m2.	Morbid Obesity,Obesity, Severe,Morbid Obesities,Obesities, Morbid,Obesities, Severe,Severe Obesities,Severe Obesity
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults
D015390	Gastric Bypass	Surgical procedure in which the STOMACH is transected high on the body. The resulting small proximal gastric pouch is joined to any parts of the SMALL INTESTINE by an end-to-side SURGICAL ANASTOMOSIS, depending on the amounts of intestinal surface being bypasses. This procedure is used frequently in the treatment of MORBID OBESITY by limiting the size of functional STOMACH, food intake, and food absorption.	Gastroileal Bypass,Gastrojejunostomy,Greenville Gastric Bypass,Roux-en-Y Gastric Bypass,Bypass, Gastric,Bypass, Gastroileal,Bypass, Roux-en-Y Gastric,Gastric Bypass, Greenville,Gastric Bypass, Roux-en-Y,Gastrojejunostomies,Roux en Y Gastric Bypass
D015431	Weight Loss	Decrease in existing BODY WEIGHT.	Weight Reduction,Loss, Weight,Losses, Weight,Reduction, Weight,Reductions, Weight,Weight Losses,Weight Reductions
D015992	Body Mass Index	An indicator of body density as determined by the relationship of BODY WEIGHT to BODY HEIGHT. BMI	Quetelet Index,Quetelet's Index,Index, Body Mass,Index, Quetelet,Quetelets Index
D050152	Intra-Abdominal Fat	Fatty tissue inside the ABDOMINAL CAVITY, including visceral fat and retroperitoneal fat. It is the most metabolically active fat in the body and easily accessible for LIPOLYSIS. Increased visceral fat is associated with metabolic complications of OBESITY.	Abdominal Visceral Fat,Fat, Intra-Abdominal,Intra-Abdominal Adipose Tissue,Retroperitoneal Adipose Tissue,Retroperitoneal Fat,Visceral Adipose Tissue,Visceral Fat,Abdominal Visceral Fats,Adipose Tissue, Intra-Abdominal,Adipose Tissue, Retroperitoneal,Adipose Tissue, Visceral,Fat, Abdominal Visceral,Fat, Intra Abdominal,Fat, Retroperitoneal,Fat, Visceral,Fats, Abdominal Visceral,Fats, Intra-Abdominal,Fats, Retroperitoneal,Fats, Visceral,Intra Abdominal Adipose Tissue,Intra Abdominal Fat,Intra-Abdominal Fats,Retroperitoneal Fats,Visceral Fats