Related Experiment Videos
DGAT and triglyceride synthesis: a new target for obesity treatment?
1Gladstone Institute of Cardiovascular Disease, University of California, San Francisco, CA 94141-9100, USA. hcc1@itsa.ucsf.edu
Abstract:
Because triglycerides are considered essential for survival and their synthesis has been thought to occur through a single mechanism, inhibiting triglyceride synthesis has been largely unexplored as a possible target for obesity treatment. However, recent studies indicate that mice lacking acyl CoA:diacylglycerol acyltransferase (DGAT), a key enzyme in triglyceride synthesis, are viable and resistant to diet-induced obesity. Unexpectedly, this resistance is caused by a mechanism involving increased energy expenditure. These findings suggest that inhibiting specific components of triglyceride synthesis, such as DGAT, is feasible and may represent a novel approach to treating obesity.
Insights
Inhibiting triglyceride synthesis, previously unexplored for obesity, is now feasible. Blocking the enzyme DGAT in mice prevented obesity by increasing energy expenditure, suggesting a novel therapeutic approach.
Area of Science:
- Biochemistry
- Metabolic disease research
- Obesity therapeutics
Background:
- Triglycerides are vital for survival.
- Triglyceride synthesis was thought to be a single, unmodifiable pathway.
- Inhibiting triglyceride synthesis for obesity treatment was largely unexplored.
Purpose of the Study:
- To investigate the feasibility of targeting triglyceride synthesis for obesity treatment.
- To explore the role of acyl CoA:diacylglycerol acyltransferase (DGAT) in obesity.
Main Methods:
- Studied mice genetically engineered to lack DGAT, a key enzyme in triglyceride synthesis.
- Assessed the viability and obesity resistance of DGAT-deficient mice.
- Investigated the underlying mechanisms of obesity resistance.
Main Results:
- Mice lacking DGAT were viable.
- DGAT-deficient mice exhibited resistance to diet-induced obesity.
- Obesity resistance was unexpectedly linked to increased energy expenditure.
Conclusions:
- Targeting specific components of triglyceride synthesis, like DGAT, is a viable strategy.
- Inhibiting DGAT offers a novel potential therapeutic approach for obesity.
- Increased energy expenditure is a key factor in DGAT-mediated obesity resistance.