Adipose overexpression of desnutrin promotes fatty acid use and attenuates diet-induced obesity
Diabetes, 2009•Am Diabetes Assoc
OBJECTIVE To investigate the role of desnutrin in adipose tissue triacylglycerol (TAG) and
fatty acid metabolism. RESEARCH DESIGN AND METHODS We generated transgenic mice
overexpressing desnutrin (also called adipose triglyceride lipase [ATGL]) in adipocytes (aP2-
desnutrin) and also performed adenoviral-mediated overexpression of desnutrin in 3T3-
L1CARΔ1 adipocytes. RESULTS aP2-desnutrin mice were leaner with decreased adipose
tissue TAG content and smaller adipocyte size. Overexpression of desnutrin increased …
fatty acid metabolism. RESEARCH DESIGN AND METHODS We generated transgenic mice
overexpressing desnutrin (also called adipose triglyceride lipase [ATGL]) in adipocytes (aP2-
desnutrin) and also performed adenoviral-mediated overexpression of desnutrin in 3T3-
L1CARΔ1 adipocytes. RESULTS aP2-desnutrin mice were leaner with decreased adipose
tissue TAG content and smaller adipocyte size. Overexpression of desnutrin increased …
OBJECTIVE
To investigate the role of desnutrin in adipose tissue triacylglycerol (TAG) and fatty acid metabolism.
RESEARCH DESIGN AND METHODS
We generated transgenic mice overexpressing desnutrin (also called adipose triglyceride lipase [ATGL]) in adipocytes (aP2-desnutrin) and also performed adenoviral-mediated overexpression of desnutrin in 3T3-L1CARΔ1 adipocytes.
RESULTS
aP2-desnutrin mice were leaner with decreased adipose tissue TAG content and smaller adipocyte size. Overexpression of desnutrin increased lipolysis but did not result in increased serum nonesterified fatty acid levels or ectopic TAG storage. We found increased cycling between diacylglycerol (DAG) and TAG and increased fatty acid oxidation in adipocytes from these mice, as well as improved insulin sensitivity.
CONCLUSIONS
We show that by increasing lipolysis, desnutrin overexpression causes reduced adipocyte TAG content and attenuation of diet-induced obesity. Desnutrin-mediated lipolysis promotes fatty acid oxidation and re-esterification within adipocytes.
Am Diabetes Assoc