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Related Experiment Videos

Familial scleroderma--evidence for environmental versus genetic trigger

C O Stephens1, D C Briggs, J Whyte

  • 1Royal Free Hospital, London.

British Journal of Rheumatology
|December 1, 1994
PubMed
Summary

Familial cases of scleroderma (systemic sclerosis, SSc) are rare. This study found shared disease characteristics and autoantibodies in affected family members, suggesting environmental factors may trigger SSc onset.

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Area of Science:

  • Rheumatology
  • Immunogenetics
  • Autoimmune Diseases

Background:

  • Familial aggregation of scleroderma (systemic sclerosis, SSc) is uncommon.
  • Understanding genetic and environmental factors in SSc is crucial for disease management.
  • Previous studies on familial SSc have yielded limited insights into disease etiology.

Purpose of the Study:

  • To investigate clinical, immunogenetic, and autoantibody profiles in families with multiple SSc cases.
  • To review existing literature on multicase SSc families to identify common patterns.
  • To explore potential genetic and environmental influences on SSc onset and presentation.

Main Methods:

  • Clinical evaluation of four families with two members each affected by SSc.
  • Immunogenetic analysis including HLA typing.

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  • Autoantibody profiling.
  • Literature review of previously reported multicase SSc families.

    • Main Results:

    • Each family pair exhibited similar cutaneous SSc subsets and shared SSc-associated autoantibodies.
    • Two family pairs shared HLA-DR alleles (DR3 or DR5) linked to scleroderma.
    • One family also possessed HLA alleles associated with their specific SSc autoantibodies.
    • Analysis of onset ages suggested environmental triggers over purely genetic predisposition.

    Conclusions:

    • Shared clinical features and autoantibodies in familial SSc suggest a complex interplay of genetic susceptibility and environmental factors.
    • While certain HLA alleles may confer risk, the timing of SSc onset points towards environmental influences.
    • Further research is warranted to elucidate the specific environmental triggers and their interaction with genetic predisposition in scleroderma.