Rh phenotype prediction by DNA typing and its application to practice

Area of Science:

• Genetics
• Immunology
• Transfusion Medicine

Background:

• The RHD and RHCE genes present significant complexity, challenging molecular analysis of the Rh blood group system.
• DNA typing for Rh phenotypes, introduced in 1993, has been applied to prenatal testing and screening for partial D antigens.
• Current molecular methods face challenges in routine application due to complexity and cost.

Purpose of the Study:

• To review and summarize current knowledge on Rh phenotype prediction using DNA typing.
• To discuss the applications and limitations of these molecular techniques beyond research settings.
• To propose strategies for improving the reliability and cost-effectiveness of blood group genotyping.

Main Methods:

• Review of published literature on Rh DNA typing techniques, including PCR-SSP for polymorphism analysis.
• Detailed examination of procedures, results, and encountered problems in Rh genotyping.
• Analysis of Rh phenotype databases for developing and validating genotyping strategies.

Main Results:

• DNA typing for Rh phenotypes is a viable alternative to serological methods, particularly for complex cases like partial D.
• Analysis of multiple polymorphisms is recommended for accurate Rh DNA typing.
• Existing phenotype databases are crucial for refining genotyping strategies.

Conclusions:

• Rh DNA typing offers a powerful tool for Rh phenotype prediction, with potential to replace serological methods in routine transfusion medicine.
• A piecemeal approach to genotyping can enhance reliability and cost-efficiency.
• Further development is needed to fully integrate DNA typing into standard clinical practice.