A novel analysis strategy for HLA typing using a sequence-specific oligonucleotide probe method
HLA, ISSN: 2059-2310, Vol: 90, Issue: 5, Page: 276-283
2017
- 1Citations
- 4Captures
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Article Description
The technique of reverse sequence-specific oligonucleotide probes (SSOPs) is commonly used in human leukocyte antigen (HLA) typing. In the conventional method for data analysis (exact pattern matching, EPM), the larger is the number of mismatched probes, the longer the time for final typing assignment. A novel strategy, filtering and scoring (FnS), has been developed to easily assign the best-fit allele pair. In the FnS method, candidate alleles and allele pairs were filtered based on (1) subject's ethnicity, and (2) the measured partial reaction pattern with only definitely negative or positive probes. Then, the complete reaction pattern for all probes (CRPoAPs) were compared between the raw sample and expected residual allele pairs to obtain mismatch scores. To compare the FnS and EPM methods, each analysis time (minutes:seconds) for reverse SSOP HLA typing with intermediate resolution (n = 507) was measured. The analysis time with FnS method was shorter than that of the EPM method [00:21 (00:08−01:47) and 01:04 (00:15−23:45), respectively, P <.05]. In addition, the analysis time of the FnS method was relatively constant, regardless of the number of mismatched probes. The alternative approach of filtering based only on definite probes (neglecting ethnicity) took a long time for analysis. However, this approach did not compromise the accuracy. The FnS method showed improved accuracy and efficiency of HLA typing in a comprehensive and quantitative comparison between measured and expected CRPoAPs of candidate allele pairs. Therefore, this analysis strategy might be useful in a clinical setting.
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