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Matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry for genotyping of human platelet‐specific antigens
Author(s) -
Garritsen Henk S.P.,
Fan Alex XiuCheng,
Bosse Nicole,
Hannig Horst,
Kelsch Reinhard,
Kroll Hartmut,
Holzgreve Wolfgang,
Zhong Xiao Yan
Publication year - 2009
Publication title -
transfusion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.045
H-Index - 132
eISSN - 1537-2995
pISSN - 0041-1132
DOI - 10.1111/j.1537-2995.2008.01953.x
Subject(s) - genotyping , multiplex , single nucleotide polymorphism , genotype , mass spectrometry , polymerase chain reaction , typing , multiplex polymerase chain reaction , microbiology and biotechnology , population , biology , chemistry , chromatography , genetics , medicine , gene , environmental health
BACKGROUND: Genotyping of single‐nucleotide polymorphisms (SNPs) using matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry (MALDI‐TOF MS) is an emerging technique, where finally tools for end users have become available to design primers and analyze SNPs of their own interest. This study investigated the potential of this technique in platelet (PLT) genotyping and developed a validated method for genotyping of clinical relevant human PLT antigens (HPAs). STUDY DESIGN AND METHODS: A multiplex assay using MALDI‐TOF MS to analyze six HPA loci (HPA‐1, HPA‐2, HPA‐3, HPA‐4, HPA‐5, and HPA‐15) simultaneously in a single reaction was applied for the genotyping of 100 DNA samples from a cohort of plateletpheresis donors and a patient population (n = 20) enriched for rare alleles. The genotyping results using MALDI‐TOF MS were validated by the comparison with the results from typing by polymerase chain reaction with sequence‐specific primers and conventional DNA sequencing. RESULTS: Both homozygous and heterozygous genotypes of HPA‐1 to ‐5 and ‐15 of the 120 individuals were easily identified by a six‐plexed assay on MALDI‐TOF MS. The three approaches achieved a 100 percent concordance for the genotyping results of the six HPA loci. CONCLUSION: Compared to conventional methods, the MALDI‐TOF MS showed several advantages, such as a high velocity, the ability to perform multiplexed assays in a single reaction, and automated high‐throughput analysis of samples. This enables cost‐efficient large‐scale PLT genotyping for clinical applications.