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Related Experiment Videos

The human obesity gene map: the 1998 update.

L Pérusse1, Y C Chagnon, J Weisnagel

  • 1Department of Social and Preventive Medicine, Faculty of Medicine, Laval University, Sainte-Foy, Québec, Canada.

Obesity Research
|February 19, 1999
PubMed
Summary

The human obesity gene map has been updated, revealing 25 cases of obesity from single gene mutations and identifying obesity-related loci on nearly all human chromosomes. This research significantly expands our understanding of the genetic factors contributing to obesity.

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Area of Science:

  • Genetics
  • Human Physiology
  • Genomics

Background:

  • Obesity is a complex health issue with a significant genetic component.
  • Previous updates to the human obesity gene map have identified numerous contributing factors.
  • Continued research is crucial for understanding the genetic architecture of obesity.

Purpose of the Study:

  • To present an updated comprehensive map of human obesity genes.
  • To review current evidence on genetic factors influencing obesity.
  • To highlight advancements in identifying obesity-related quantitative trait loci and candidate genes.

Main Methods:

  • Review of published literature up to October 1998.
  • Inclusion of data from single gene mutations causing obesity.

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  • Analysis of Mendelian disorders with obesity features.
  • Examination of genome-wide scans and crossbreeding experiments in animal models.
  • Inclusion of association, case-control, and linkage studies.

    • Main Results:

    • The number of obesity cases due to single gene mutations increased from 3 to 25, involving 12 mutations in 7 genes.
    • Obesity-related loci have been identified on all human chromosomes except Y.
    • Multiple obesity-related loci are located on both arms of chromosomes 1, 2, 3, 6, 7, 8, 9, 11, 17, 19, 20, and X.
    • Approximately 200 genes and markers are now associated with human obesity phenotypes.

    Conclusions:

    • The genetic landscape of human obesity is rapidly expanding.
    • A significant number of genes and loci contribute to obesity phenotypes.
    • The updated gene map provides a valuable resource for future obesity research.