Chinese Journal of Tissue Engineering Research ›› 2016, Vol. 20 ›› Issue (1): 102-106.doi: 10.3969/j.issn.2095-4344.2016.01.018

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Sequencing analysis of a rare human leukocyte antigen, C*08:99, from a volunteer donor of hematopoietic stem cell transplantation

Wang Da-ming, Zou Hong-yan, Nie Dong-mei, Gao Su-qing, Wang Fei   

  1. Immunogenetics Laboratory, Shenzhen Blood Center, Shenzhen 518035, Guangdong Province, China
  • Online:2016-01-01 Published:2016-01-01
  • Contact: Wang Da-ming, Immunogenetics Laboratory, Shenzhen Blood Center, Shenzhen 518035, Guangdong Province, China
  • About author:Wang Da-ming, Associate chief technician, Immunogenetics Laboratory, Shenzhen Blood Center, Shenzhen 518035, Guangdong Province, China
  • Supported by:

    the Natural Science Foundation of Guangdong Province, No. c15140500000119

Abstract:

BACKGROUND: As the sequencing technology has been widely used and high-resolution confirmation of organ transplant matching has been gradually developed, new human leukocyte antigen (HLA) alleles are emerging. However, the gene frequency of some genes cannot be calculated accurately, and there are rare reports. These genes are often ignored, and it is easy to misjudge their genotypes only according to gene frequency. 
OBJECTIVE: To test and analyze a rare allele, HLA-C*08:99, from a volunteer donor of hematopoietic stem cell transplantation.
METHODS: Genomic DNA was extracted automatically from the blood sample by using quick DNA purified kit and amplified by HLA-C locus commercial sequence-based typing kit. The purified PCR product was utilized as the DNA template in the sequencing reaction, and six direct sequencing reactions of PCR product covering exons 2, 3 and 4 in both directions were performed using commercial kit. Four direct sequencing reactions of PCR product covering exon 5 in both directions, exon 6 in forward direction and exon 7 in reverse direction were performed using in-house BigDye terminator cycle sequencing reaction kit. Sequencing reaction products purified by ethanol/sodium acetate/ ethylenediaminetetraacetic acid method were sequenced by ABI PrismTM3730 DNA Sequencer.
RESULTS AND CONCLUSION: The allele assignment was analyzed with Assign-SBT 3.6+ software, and the sample HLA-C typing result was C*07:04, 08:99. Increasing the sequencing analysis at exons 5, 6 and 7 of HLA-C locus will help to make clear the ambiguous SBT result and improve the accuracy of HLA-C typing when it is necessary, which shows important significance in clinical tissue matching. 

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