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Terminal complement component deficiencies in Japan.

Y Fukumori1, T Horiuchi

  • 1Osaka Red Cross Blood Center, Osaka, Japan. yfoichan@al.mbn.or.jp

Experimental and Clinical Immunogenetics
|March 11, 1999
PubMed
Summary
This summary is machine-generated.

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Inherited deficiencies in complement components C5, C6, C7, C8, and C9 are present in healthy Japanese blood donors. Genetic analysis identified specific mutations underlying some of these complement deficiencies.

Area of Science:

  • Immunology
  • Genetics
  • Biochemistry

Background:

  • The complement system is crucial for innate immunity.
  • Deficiencies in complement components can lead to increased susceptibility to infections.
  • Prevalence of complement component deficiencies in Asian populations is not well-established.

Purpose of the Study:

  • To determine the prevalence of inherited deficiencies in complement components C5, C6, C7, C8, and C9 in a healthy Japanese blood donor population.
  • To investigate the genetic basis of identified complement deficiencies.

Main Methods:

  • Serological screening of 145,640 healthy Japanese blood donors for complement component deficiencies.
  • Genetic analysis using exon-specific PCR-SSCP and direct sequencing for individuals with identified deficiencies.

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Main Results:

  • Identified 2 cases of C5 deficiency (C5D), 4 of C6D, 6 of C7D, 4 of C81D, and 138 of C9D.
  • Elucidated the genetic causes for some C6D, C7D, C81D, and C9D individuals.

Conclusions:

  • Inherited deficiencies in C5-C9 are present in the Japanese population.
  • Genetic investigations are essential for understanding the molecular basis of complement deficiencies.