Chimerism analysis by ABO blood group genotyping with digital droplet PCR
Takuya Naruto1, Maiko Sagisaka1, Mieko Ito1
1Clinical Research Institute, Kanagawa Children's Medical Center, Yokohama, Kanagawa, Japan.
International Journal of Hematology
|December 17, 2024
Summary
A new digital droplet polymerase chain reaction (ddPCR) assay for chimerism analysis in allogeneic hematopoietic stem cell transplant (HCT) recipients was developed. This sensitive and rapid method uses ABO gene polymorphisms as markers.
Area of Science:
- Biochemistry
- Genetics
- Immunology
Background:
- Chimerism analysis is crucial for monitoring allogeneic hematopoietic stem cell transplant (HCT) recipients.
- Existing chimerism analysis techniques have limitations in sensitivity, versatility, and turnaround time.
Purpose of the Study:
- To develop a novel digital droplet polymerase chain reaction (ddPCR) assay for chimerism analysis.
- To utilize ABO gene polymorphisms as markers for enhanced chimerism detection.
Main Methods:
- The developed ddPCR assay assesses ABO gene polymorphisms (rs8176719, rs8176746, rs8176747) to determine ABO blood genotypes.
- ABO genotypes were analyzed in blood samples from 15 HCT recipients.
Main Results:
- The ddPCR assay successfully distinguished six ABO genotypes (AA, AO, BB, BO, AB, OO).
- Results demonstrated compatibility with established methods like SRY gene analysis and short tandem repeat markers.
- The assay achieved 77% accuracy in distinguishing chimerism in Japanese donor-recipient pairs.
Conclusions:
- A sensitive and rapid ddPCR-based chimerism analysis method for HCT was successfully developed.
- The method effectively utilizes ABO gene polymorphisms for post-transplant monitoring.
