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Complement C4, factor B and C3 polymorphism in north India

J Kramer1, L M Srivastava, E Ferenczy

  • 1National Institute of Haematology, Blood Transfusion and Immunology, Budapest, Hungary.

Acta Microbiologica Et Immunologica Hungarica
|January 1, 1995
PubMed
Summary
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This study analyzed complement protein allotype frequencies in North Indians, finding C4 differences compared to Europeans. The data supports historical theories of Indian migration to Hungary.

Area of Science:

  • Immunogenetics
  • Population Genetics
  • Biochemistry

Background:

  • Complement system proteins (C4, factor B, C3) play crucial roles in immunity.
  • Understanding the genetic diversity of these proteins is vital for population genetics and evolutionary studies.
  • Previous studies have established allele frequencies in various populations, but North Indian data was lacking.

Purpose of the Study:

  • To determine the allotype frequencies of complement C4, factor B, and C3 proteins in a North Indian population.
  • To compare these frequencies with those reported in other populations, particularly European Caucasians.
  • To investigate potential genetic links between the North Indian population and Hungarian Gypsies based on complement allele frequencies.

Main Methods:

  • Blood samples were collected from 192 healthy, unrelated individuals from North India.

Related Experiment Videos

  • Protein electrophoresis and specific typing techniques were used to determine the allotypes of C4, factor B, and C3.
  • Gene frequencies were calculated based on the observed allotype distributions.
  • Main Results:

    • Gene frequencies for common factor B and C3 alleles in North Indians align with previously published data.
    • Significant differences in C4 allotype frequencies were observed between the North Indian population and European Caucasians.
    • Certain complement allele frequencies in the North Indians showed concordance with historical migration patterns linking them to Hungarian Gypsies.

    Conclusions:

    • The study provides the first comprehensive data on C4 allotype frequencies in the North Indian population.
    • The observed genetic variations in complement proteins highlight population-specific adaptations and evolutionary histories.
    • The findings support historical hypotheses regarding the Indian origin of Hungarian Gypsies, using complement protein polymorphisms as genetic markers.