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Molecular testing for transfusion medicine.

Connie M Westhoff1

  • 1American Red Cross, Philadelphia, Pennsylvania 19130, USA. westhoffc@usa.redcross.org

Current Opinion in Hematology
|October 21, 2006
PubMed
Summary
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Molecular genotyping has advanced blood banking over the last decade. This technology is now ready for widespread use, improving transfusion safety and outcomes by enabling precise antigen matching.

Area of Science:

  • Blood banking and transfusion medicine
  • Molecular diagnostics
  • Genetics and genomics

Background:

  • Molecular testing methods, including genotyping, became available over a decade ago.
  • This review focuses on the progress in applying genotyping in prenatal and transfusion medicine over the past ten years.

Purpose of the Study:

  • To summarize the advancements in genotyping applications for prenatal and transfusion medicine.
  • To highlight the potential of genotyping to revolutionize blood banking practices.

Main Methods:

  • Review of progress in genotyping applications over the last decade.
  • Analysis of current genotyping assay capabilities and limitations.
  • Discussion of implementation challenges and future potential.

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Main Results:

  • Genotyping assays targeting prevalent polymorphisms are reproducible and correlate well with red blood cell phenotype.
  • Accurate typing may require detecting silencing mutations and sampling multiple gene regions for certain blood groups (e.g., ABO, Rh).
  • Genotyping offers advantages over serologic testing for transfused patients, D-zygosity, noninvasive fetal typing, and antigen matching in sickle cell disease.

Conclusions:

  • Molecular testing implementation in transfusion medicine has been gradual, mainly in reference labs.
  • High-throughput platforms are poised to bring genotyping into mainstream practice.
  • Widespread genotyping will enable electronic selection of antigen-matched donor units, potentially preventing alloimmunization and improving transfusion outcomes.