alexa [Study on allelic characteristics of "homozygote" resulted from low resolution genotyping of HLA-Cw locus].
Clinical Research

Clinical Research

Journal of Clinical and Experimental Transplantation

Author(s): Liang F, Liu N, Jin L, Yuan F, Liu JF,

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Abstract OBJECTIVE: To study the allelic characteristics of "homozygote" resulted from low resolution genotyping of HLA-Cw locus and to provide more precise typing data for clinical transplantation. METHODS: Forty three related allogeneic hematopoietic stem cell transplantation(allo-HSCT) donors and patients with HLA-Cw * 03, Cw * 07 homozygote, which were the most common gene groups in Chinese population, identified by low resolution genotyping level were retyped by high resolution PCR-SSP genotyping method, and three dimensional structure modelling was also made by using a solely developed HLA three-dimensional matching software (HLA strucMark version 1.0) to evaluate the effect of differences between two mismatched alleles and its relationship with GVHD occurrence. RESULTS: The typing results of high resolution level demonstrated that the confirmed allelic homozygotes for Cw * 03 and Cw * 07 were 14\% and 43\%, respectively, while the others were all heterozygotes. The ambiguous typing results could be confirmed by family data study or by high resolution typing methods when there was no family data available, Three-dimensional modeling results of the mismatched alleles undetected in low resolution typing level indicated that family data study or high resolution PCR-SSP genotyping were important in preventing graft-versus-host disease. CONCLUSIONS: When HLA-Cw homozygote results were found in low resolution genotyping method, the results should be reconfirmed by family data study or by high resolution typing methods to provide precise typing results for avoiding severe graft-versus-host disease.
This article was published in Zhonghua Xue Ye Xue Za Zhi and referenced in Journal of Clinical and Experimental Transplantation

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