Related Experiment Video
Updated: Jul 3, 2026

Isolation and Differentiation of Stromal Vascular Cells to Beige/Brite Cells
Published on: March 28, 2013
Regulation of adipose triglyceride lipase by rosiglitazone
L-F Liu1, A Purushotham, A A Wendel
1Department of Human Nutrition, The Ohio State University, Columbus, OH 43210, USA.
Aim:
To elucidate the mechanism by which rosiglitazone regulates adipose triglyceride lipase (ATGL).
Methods:
Male C57Bl/6 mice were treated with rosiglitazone daily (10 mg/kg body weight), and adipose tissues were weighed and preserved for mRNA and protein analysis of ATGL. In parallel, preadipocyte (3T3-L1) cells were differentiated with insulin/dexamethasone/3-isobutyl-1-methlxanthine cocktail or rosiglitazone, and ATGL levels were measured with real-time PCR, western blotting and immunohistochemistry.
Results:
Rosiglitazone concomitantly promoted differentiation of pre-adipocytes to functional adipocytes and induced mRNA levels of ATGL. The peroxisome proliferator-activated receptor-gamma (PPARgamma) antagonist bisphenol A diglycidyl ether significantly abrogated the induction of mRNA, but not protein levels of ATGL by rosiglitazone in differentiated 3T3-L1 adipocytes. In the presence of epinephrine rosiglitazone stimulated free fatty acid release and increased diacylglycerol acyltransferase-1 (DGAT-1) mRNA suggest that ATGL and DGAT-1 may be cooperatively involved in rosiglitazone-stimulated triglyceride hydrolysis and fatty acid re-esterification in 3T3-L1 adipocytes. Treatment of 3T3-L1 adipocytes with rosiglitazone or insulin did not appear to alter localization of ATGL staining surrounding lipid droplets. Finally, we found that rosiglitazone increased ATGL mRNA levels in 3T3-L1 adipocytes in the presence of cycloheximide, an inhibitor of protein synthesis, suggesting that rosiglitazone regulation of ATGL occurs at the transcriptional level.
Conclusions:
Rosiglitazone directly regulates transcription of ATGL, likely through a PPARgamma-mediated mechanism.
Related Concept Videos
Oral Hypoglycemic Agents: Biguanides and Glitazones
Glucagon-like Receptor Agonists
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by the...
Overview of Lipid Metabolism
Lipolysis: The Breakdown of Lipids:
Lipolysis is the process of breaking down lipids, particularly triglycerides, into glycerol and fatty acids. This process typically occurs in the adipose tissue and is triggered by various hormones, including glucagon and...
Dipeptidyl Peptidase 4 Inhibitors
Cholesterol: Significance and Regulation
Considering cholesterol and...
Oral Hypoglycemic Agents: α-Glucosidase Inhibitors
Acarbose and miglitol are typically...
