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Related Experiment Videos

Manic depressive illness in a founder population.

Evelyne Heyer1, Bruno Toupance, Cesare Perri

  • 1Laboratoire d'Anthropologie Biologique, Museum National d'Histoire Naturelle, CNRS FRE2292, France.

European Journal of Human Genetics : EJHG
|August 2, 2003
PubMed
Summary

Manic depressive illness (MDI) in an Italian village suggests a genetic link. Specific founders within a subpopulation likely carry the MDI trait, identifiable through genetic analysis.

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Area of Science:

  • Genetics
  • Psychiatry
  • Population Studies

Background:

  • Manic depressive illness (MDI) segregation observed in a founder population from Southern Italy.
  • Traditional genealogical methods are insufficient for establishing identity by descent in this population.
  • A comprehensive family database spanning several centuries provides a resource for genetic analysis.

Purpose of the Study:

  • To identify specific founders and their genetic contributions linked to MDI in the S population.
  • To determine if MDI in this population is identical by descent from a specific ancestral group.
  • To investigate the genetic architecture of MDI within a genetically isolated community.

Main Methods:

  • Selection of MDI probands from the S population and control groups from the same and unrelated populations.

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  • Utilizing a 56,000-person family reconstruction database for genealogical analysis.
  • Calculating genetic contributions of founders and genetic distances between MDI probands relative to founders.

    • Main Results:

    • Seventeen specific founders were identified in the ancestry of all S MDI probands, but not in control groups.
    • MDI patients in the S population are derived from a distinct subpopulation.
    • Genetic distances between MDI probands were significantly smaller concerning specific founders.

    Conclusions:

    • A specific subpopulation within S harbors founders carrying a putative MDI trait.
    • The MDI trait in this population is likely identical by descent, originating from these specific founders.
    • This study highlights the utility of founder populations for identifying genetic underpinnings of complex diseases.