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Related Experiment Videos

Partial expression of RHc on the RHD polypeptide.

B H Faas1, E A Beuling, P C Ligthart

  • 1Department of Experimental Immunohematology, Central Laboratory of the Netherlands Blood Transfusion Service.

Transfusion
|September 12, 2001
PubMed
Summary

The Rh blood group system

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Area of Science:

  • Immunogenetics
  • Molecular biology
  • Blood group serology

Background:

  • The Rh blood group system is crucial in transfusion medicine.
  • The c antigen is highly immunogenic, second only to D.
  • Understanding Rh antigen expression is vital for preventing transfusion reactions.

Purpose of the Study:

  • To investigate a novel partial c phenotype.
  • To identify the genetic basis of this partial c phenotype.
  • To determine the role of specific mutations in Rh antigen expression.

Main Methods:

  • Serological testing of red blood cells (RBCs) with anti-c reagents.
  • Genomic DNA and complementary DNA (cDNA) sequence analysis.
  • Transduction studies using K562 erythroleukemic cells.

Main Results:

  • Identified a new partial c phenotype (D(c)).
  • Discovered two point mutations (307T>C and 329T>C) in the RHD allele, with 307T>C leading to S103P.
  • Demonstrated that the mutated RHD allele likely encodes the c antigen.
  • Confirmed expression of c in K562 cells transduced with the mutated RHD cDNA.

Conclusions:

  • The amino acid at position 103 (P103) is critical for c antigen expression.
  • The c antigen can be expressed on the RhD polypeptide in vivo.
  • This finding advances the understanding of Rh blood group genetics and immunogenicity.

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