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[Exon polymorphism of human RHD gene]
Hua-you Zhou1, Jiong-cai Lan, Xiao-zhu Wang
1Department of Blood Transfusion, Nanfang Hospital, First Military Medical University, Guangzhou 510515, China. zhy@fimmu.com
Di 1 Jun Yi Da Xue Xue Bao = Academic Journal of the First Medical College of PLA
|May 21, 2004
Summary
Genetic variations in the human RHD gene are common in RhD-negative individuals. This study reveals exon polymorphism, including deletions, as a key genetic mechanism.
Area of Science:
- Genetics
- Immunology
- Molecular Biology
Background:
- The RhD blood group system is crucial for transfusion medicine and pregnancy.
- Understanding the genetic basis of RhD-negative phenotypes is essential for accurate blood typing.
Purpose of the Study:
- To investigate the exon polymorphism of the human RHD gene.
- To elucidate the genetic mechanisms underlying RhD-negative status in individuals.
Main Methods:
- Polymerase Chain Reaction using Sequence-Specific Primers (PCR-SSP) was employed.
- Samples analyzed included 40 RhD-positive, 120 RhD-negative, and 2 weak D blood samples.
Main Results:
- All 10 RHD gene exons were detected in RhD-positive and weak D samples.
- Among RhD-negative individuals, 23.33% had 10 exons, 15.83% showed partial exon deletions, and 60.83% had complete exon deletion.
- Notably, 19 Del phenotype samples within the RhD-negative group retained all 10 exons.
Conclusions:
- Significant exon polymorphism exists within the RHD gene of RhD-negative individuals.
- The primary genetic mechanisms observed are gross deletion, partial deletion, and non-deletion of RHD exons.