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DNA TYPING FOR HLA-DR, HLA-DQ AND HLA-DP ALLELES IN A CHINESE POPULATION USING THE POLYMERASE CHAIN-REACTION (PCR) AND OLIGONUCLEOTIDE PROBES

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机构: [1]UNIV TEXAS,SW MED CTR,DALLAS,TX 75230; [2]CHINA JAPAN FRIENDSHIP HOSP,BEIJING,PEOPLES R CHINA; [3]BEIJING CHILDRENS HOSP,BEIJING,PEOPLES R CHINA
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关键词: HLA CLASS-II CHINESE PCR OLIGONUCLEOTIDE PROBES

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We have determined alleles of HLA-DRB1, DRB3, DRB5, DQA1, DQB1, and DPB1 loci in 91 unrelated healthy individuals from North China. Group-specific PCR primers were employed for the analysis of subsets of DR1. DR2, DR4, DRw52, and DPB. With allele-specific probes, 22 DRB1, 8 DQA1, 13 DQB1, and 12 DPB1 alleles were found in this panel. Allele frequencies showed that 25.3% of the subjects had DR7 and 26.4% had DR9, only 5.5% had DRB1*0301 (DRw17). In the DR4 group, DRB1*0405 (Dw15, 8.8%) and 0406 (KT2, 9.9%) were the most prevalent alleles. DRB1*0404 (Dw14.1), 0407 (Dwl3.2) and 0408 (Dw14.2) were absent and the other alleles of the DR4 group were rare. The most common DRw6 subset was DRB1*1401 (8.8%). DRB1*0802 and 0803 were present (2.2%, 6.6%), and DRB1*0801 was not found. Associations with DQA1 and DQB1 were generally similar to those found in other populations. DPB1*0501 was the most frequent (60.2%) allele at the DPB1 locus. Overall our study shows that the distribution of class II alleles in a population from Mainland China is quite different from other ethnic groups. The high frequency of the KT2 subset of DR4 (DRB1*0406) and of DPB1*0501 are the most striking features found. A new type of DR4 was determined in one subject. It was like DR4-Dw15 (DRB1*0405) but, according to our hybridization patterns, it encoded valine instead of glycine in position 86. It is now called DRB1*0410.

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第一作者机构: [1]UNIV TEXAS,SW MED CTR,DALLAS,TX 75230; [2]CHINA JAPAN FRIENDSHIP HOSP,BEIJING,PEOPLES R CHINA; [3]BEIJING CHILDRENS HOSP,BEIJING,PEOPLES R CHINA
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