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We report here the DNA polymerase chain reaction sequence-specific oligonucleotide (PCR-SSO) typing of the HLA-DR B1, B3, B4, B5 and DQB1 loci for a sample of 103 Vietnamese Kinh from Hanoi, and compare their allele and haplotype frequencies to other East Asiatic and Oceanian populations studied during the 11th and 12th International HLA Workshops. The Kinh exhibit some very high-frequency alleles both at DRB1 (1202, which has been confirmed by DNA sequencing, and 0901) and DQB1 (0301, 03032, 0501) loci, which make them one of the most homogeneous population tested so far for HLA class II in East Asia. Three haplotypes account for almost 50% of the total haplotype frequencies in the Vietnamese. The most frequent haplotype is HLA-DRB1*1202-DRB3*0301-DQB1*0301 (28%), which is also predominant in Southern Chinese, Micronesians and Javanese. On the other hand, DRB1*1201 (frequent in the Pacific) is virtually absent in the Vietnamese. The second most frequent haplotype is DRB1*0901-DRB4*01011-DQB1*03032 (14%), which is also commonly observed in Chinese populations from different origins, but with a different accessory chain (DRB4*0301) in most ethnic groups. Genetic distances computed for a set of Asiatic and Oceanian populations tested for DRB1 and DQB1 and their significance indicate that the Vietnamese are close to the Thai, and to the Chinese from different locations. These results, which are in agreement with archaeological and linguistic evidence, contribute to a better understanding of the origin of the Vietnamese population, which has until now not been clear.
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Document Type: Original Article

Affiliations: 1: LNH, Department of Immunology, Saint-Louis Hospital, University Paris VII, France, and , 2: Laboratory of Genetics and Biometry, University of Geneva, Switzerland

Publication date: 1997-10-01

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