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Systemic sclerosis in two second cousins: a case report.

T Kuroda1, S Murakami, S Honda

  • 1Department of Medicine II, Niigata University School of Medicine , 1-757 Asahimachi-dori, Niigata 951-8510 , Japan.

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Summary
This summary is machine-generated.

Two second cousins with systemic sclerosis shared human leukocyte antigen (HLA) alleles, including a specific HLA-DR2 type, suggesting a potential genetic link. While both had limited systemic sclerosis, their autoantibody profiles differed.

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Area of Science:

  • Immunogenetics
  • Rheumatology
  • Autoimmune Diseases

Background:

  • Systemic sclerosis is a complex autoimmune disease with suspected genetic components.
  • Human Leukocyte Antigen (HLA) genes are crucial for immune regulation and have been implicated in autoimmune disease susceptibility.

Purpose of the Study:

  • To investigate potential shared genetic factors, specifically Human Leukocyte Antigen (MHC) alleles, in related individuals with systemic sclerosis.
  • To explore the association of specific HLA alleles, particularly HLA-DR2, with the development and clinical presentation of systemic sclerosis.

Main Methods:

  • Case report describing two second cousins diagnosed with systemic sclerosis.
  • Analysis of shared Human Leukocyte Antigen (MHC) class I and class II alleles between the patients.

Main Results:

  • Both patients shared several MHC class I alleles (A2, A26, B60, Cw7) and the MHC class II allele HLA-DR2.
  • HLA-DR2 was identified as a potentially disease-associated allele in these patients.
  • Both patients presented with a limited subtype of systemic sclerosis, but exhibited distinct autoantibody expression patterns.

Conclusions:

  • Shared MHC alleles, particularly HLA-DR2, may contribute to the genetic predisposition for systemic sclerosis in familial cases.
  • Despite shared genetic background and limited disease subtype, individual variations in autoantibody profiles are observed in systemic sclerosis.