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Genetics of human obesity
Best Practice & Research. Clinical Endocrinology & Metabolism
|September 14, 2001
Summary
Genetic factors contribute to obesity, with specific gene defects identified for rare monogenic forms. Research continues to explore polygenic influences on common obesity susceptibility.
Area of Science:
- Genetics
- Obesity Research
- Metabolic Disorders
Background:
- Obesity is a complex condition influenced by both genetic predisposition and environmental factors like diet and physical activity.
- Recent advancements have identified specific gene mutations causing monogenic obesity, such as those in leptin, leptin receptor, pro-opiomelanocortin, pro-hormone convertase-1, and melanocortin-4 receptor genes.
Purpose of the Study:
- To review the genetic underpinnings of obesity, differentiating between monogenic and polygenic forms.
- To discuss current and future strategies for identifying genes associated with common, polygenic obesity.
Main Methods:
- Review of genetic research on monogenic obesity.
- Discussion of candidate gene approaches and positional cloning for polygenic obesity research.
Main Results:
- Identification of key genes (leptin, MC4R, etc.) responsible for monogenic human obesity.
- Limited success in identifying specific genes for common polygenic obesity to date.
Conclusions:
- Genetic defects are definitively linked to monogenic obesity.
- Further research, including candidate gene studies and positional cloning, is needed to understand the genetic basis of common obesity.