The thirteen DRB1, 6 DQA1, and 5 DQB1 alleles were defined in 362 healthy Korean controls using reverse dot blot hybridization method. The twenty-four immobilized SSOs for DRB1, 8 for DQA1, and 6 for DQB1 were used for this study. The frequencies of genotypes were DRB104 (17.1'Yo), '09 (13.1%), and '13 (11.6%); DQA1'01 (46.7%), 03 (30.8%), and '05 (11.7%); DQB1*03 (39.5%), '06 '(29.8%), and 05 (16.0%). ...continue...
Alleles* ; Genotype ; Haplotypes* ; HLA-DRB1 Chains

BACKGROUND: The association between HLA-DRB1 gene and severity of rheumatoid arthritis (RA) has been documented in various reports. Especially, DRB1*0405 allele shows significant association with RA in Korean patients. DRB1*0405 typing has been performed by the sequence based typing method (SBT), that is a difficult and expensive method. So we tried to replace it with a simple and inexpensive method. METHODS: We performed the HLA-DRB1*0405 typing using PCR-SSP technique with sequence specific primers of 3 pair in 298 Koreans. These results were compared with those of high resolution sequence based typing (SBT) method. RESULTS: Of 298 samples typed with the high resolution SBT method, 60 samples were HLA-DRB1*04 positive and showed 9 subgroups of HLA-DRB1*04 and 26 samples were HLA- DRB1*0405 positive. With the PCR-SSP method, same 26 samples were HLA-DRB1*0405 positive, showing 100% correspondence between two methods to detect HLA-DRB1*0405 CONCLUSIONS: Using PCR-SSP method to type HLA-DRB1*0405 is a very useful tools for studying the association between rheumatoid arthritis and HLA-DRB1*0405 from a practical and economic view.
Alleles ; Arthritis, Rheumatoid ; HLA-DR Antigens ; HLA-DRB1 Chains ; Humans

No abstract available.
Alleles* ; Base Sequence* ; DNA* ; HLA-DR4 Antigen* ; HLA-DRB1 Chains*

BACKGROUND: HLA-DR typing kits using reverse-SSO (sequence specific oligonucleotide) method show considerable ambiguities in HLA-DRB1 generic typing. We analyzed the ambiguities of the Dynal RELI(TM) SSO HLA-DRB test (Dynal DRB test) and developed an 'Interpretation Program for Koreans'. METHODS: A total of 3,000 Koreans were typed for HLA-DRB1/B3/B4/B5 using the 36 probe Dynal DRB test and all of the cases showing ambiguities in HLA-DRB1 generic typing were subjected to confirmatory typing using the PCR-single strand conformation polymorphism (SSCP) method. On the basis of these results, an 'Interpretation Program for Koreans'was developed for the 45 probe Dynal DRB test. RESULTS: Among 3,000 Koreans tested by the 36 probe Dynal DRB test, 456 cases (15.2%) showed ambiguities. In 95% of the ambiguity cases (433/456) and 99.2% of the total cases tested (433/3,000), the'most probable type'could be expected from the DRB1 gene frequencies and DRB1-B3/B4/B5 associations in Koreans and these results were in accordance with the confirmatory typing results as well as the results given by the 'Interpretation Program for Koreans'. Similarly, the 'Most Probable'could be assigned by the program in 99.4% (348/350) of the cases tested with the 45 probe Dynal DRB test. CONCLUSIONS: Ambiguity in the Dynal DRB test was observed in >15% of the Korean samples tested. The majority (95%) of the ambiguities could be resolved on the basis of HLA-DRB1 gene frequencies and DRB1-B3/B4/B5 associations in Koreans. Furthermore, using the program developed in this study, the correct assignment of DRB1 generic types was possible without additional typing in the majority (>99%) of the cases tested.
Dichlororibofuranosylbenzimidazole ; DNA ; Gene Frequency ; HLA-DR Antigens* ; HLA-DRB1 Chains

OBJECTIVETo discriminate and analyze the relative frequencies of alleles in HLA-DRB1*12:01:01G(HLA-DRB1*12:01:01/12:06/12:10/12:17) and HLA-DRB1*14:01:01G (DRB1*14:01:01/14:54) groups and assess their associations with HLA-DRB3 and HLA-DQB1 loci.

METHODSA total of 115 DNA samples previously typed as HLA-DRB1*12:01:01G and 108 samples from HLA-DRB1*14:01:01G were selected. DNA sequences for exons 1 to 3 of the HLA-DRB1 locus were analyzed for HLA-DRB1*12:01:01G, and exons 2 to 3 were analyzed for HLA-DRB1*14:01:01G by polymerase chain reaction sequence-based typing (PCR-SBT). Genotyping of HLA-DRB3 and HLA-DQB1 were achieved by PCR-SBT.

RESULTSAmong 115 samples previously typed as HLA-DRB1*12:01:01G, 101 (87.8%) were confirmed as HLA-DRB1*12:01:01 and 14 (12.2%) were HLA-DRB1*12:10, but HLA-DRB1*12:06 and HLA-DRB1*12:17 alleles were not identified. For 108 samples previously typed as HLA-DRB1*14:01:01G, all were typed as HLA-DRB1*14:54. HLA-DRB1*12:01:01 was linked with HLA-DRB3*01:01:02 and HLA-DQB1*03:01, while HLA-DRB1*12:10 was strongly linked with HLA-DRB3*02:02:01 and HLA-DQB1*03:01. HLA-DRB1*14:54 was strongly linked with HLA-DRB3*02:02:01 and two different HLA-DQB1*05:02, *05:03 alleles.

CONCLUSIONHLA-DRB1*12:01:01 was more prevalent than HLA-DRB1*12:10 in the HLA-DRB1*12:01:01G group, and HLA-DRB1*14:54 was the dominant allele for HLA-DRB1*14:01:01G.

Alleles ; Exons ; Gene Frequency ; Genotype ; HLA-DQ beta-Chains ; genetics ; HLA-DRB1 Chains ; genetics ; HLA-DRB3 Chains ; genetics ; Humans

No abstract available.
Alleles* ; Hepatitis B Vaccines* ; Hepatitis B* ; Hepatitis* ; HLA-DRB1 Chains*

Disease Susceptibility ; HLA-DQ beta-Chains ; genetics ; HLA-DRB1 Chains ; genetics ; Humans ; Pneumoconiosis ; genetics ; Polymorphism, Genetic

OBJECTIVETo investigate the HLA-DRB1, DQB1 allele polymorphism in Kunming Yi nationality population.

METHODSHLA-DRB1, DQB1 DNA types in 70 healthy children of Yi nationality in Kunming were analyzed by polymerase chain reaction with sequence specific primer (PCR-SSP).

RESULTSTwelve alleles at HLA-DRB1 locus were observed in the 70 children: the alleles with gene frequencies higher than 10% were HLA-DRB1*12(33.57%), DRB1*0901(11.43%), DRB1*04(11.43%); the alleles with gene frequencies between 10% and 5% were HLA-DRB1*01(8.57%), DRB1*11(7.86%), DRB1*14(7.14%), DRB1*15(7.14%), DRB1*08(5%); the alleles with gene frequencies lower than 5% were HLA-DRB1*03(2.86%), DRB1*13(2.14%), DRB1*07(1.43%), DRB1*16(1.43%). Seven alleles at HLA-DQB1 locus were observed in the 70 children: the alleles with gene frequencies higher than 10% were HLA-DQB1*0301(45%), DQB1*05(22.14%), DQB1*0303(12.14%); the alleles with gene frequencies between 10% and 5% were HLA-DQB1*04(6.43%), DQB1*06(6.43%); the alleles with gene frequencies lower than 5% were HLA-DQB1*0201(4.29%) and DQB1*0302(3.57%).

CONCLUSIONThe distribution of HLA-DRB1, DQB1 allele polymorphism in the Kunming Yi nationality population is distinctive. It is neither like that in the South Han population nor like that in the North Han population.

Alleles ; China ; HLA-DQ Antigens ; genetics ; HLA-DQ beta-Chains ; HLA-DR Antigens ; genetics ; HLA-DRB1 Chains ; Humans ; Polymorphism, Genetic

BACKGROUND: HLA proficiency survey in Korea started in 1996 and the results of the survey were last reported in 1999. In this report, we summarized the results of the survey performed in recent 2 years. METHODS: A total of four proficiency surveys were performed, in which 54-59 laboratories participated. Each survey included 3 tests for HLA class I (serology and DNA) and class II (DNA) typing and 6 for HLA crossmatch test (3 cells x 2 sera). RESULTS: Overall concordance of serologic typing was 99.5% (436/438) for HLA-A, 95.7% (419/438) for HLA-B, and 94.8% (199/210) for HLA-C. The antigens assigned incorrectly by more than 5% of the participating laboratories were B54 (10.3%), B55 (10.3%), B27 (5.4%), Cw6 (22.9%), and C-blank (5.7%). Overall concordance rates of DNA typing were 99.7% (393/394) for HLA-A, 99.8% (415/416) for HLA-B, 100% (156/156) for HLA-C. Correct assignment of HLA-DRB1 and -DQB1 was reportred by 99.7% (98.1-100%) and 99.2% (88.9-100%) for generic and 99.2% and 98.1% (80-100%) for allelic level, respectively. Most laboratories (93.5-97.9%) were using sensitive methods of crossmatch such as T-long, T-AHG, and flowcytometry. The proportion of laboratories evaluated as unacceptable was on the average 3.1% of total laboratories. CONCLUSIONS: The rate of correct identification of HLA antigens was higher this time than in the previous survey in 1999. The rate of unacceptable crossmatch was also low enough to be satisfactory. It is thought that the proficiency survey has contributed to the high quality of HLA tests in the participating laboratories and should be continued to maintain the proficiency in Korea.
DNA Fingerprinting ; Histocompatibility Testing* ; HLA Antigens ; HLA-A Antigens ; HLA-B Antigens ; HLA-C Antigens ; HLA-DRB1 Chains ; Korea

BACKGROUND: HLA proficiency survey was started in 1996 in Korea, and the results of the 1996-1998 surveys were reported previously. Here, we report the results of the surveys performed in recent three years (2000-2002). METHODS: Six surveys were carried out with the participation of 52-54 laboratories. For each survey, 3 peripheral blood samples and 2 sera were distributed for 3 HLA class I serology, 3 HLA class I DNA, 3 HLA class II DNA, 6 HLA crossmatch, and 3 PRA tests. RESULTS: Overall consensus of serologic typing was similar to the results of the previous survey: HLA-A 93.5%, HLA-B 88.3%, and HLA-A, B 82.7%. There were an increasing number of the laboratories that were using DNA typing for HLA-DR (51 laboratories, 94%) and HLA-A and B (26 laboratories, 48%). Overall consensus of DNA typing was very high: HLA-A 100%, HLA-B 99.1%, HLAC 97.9%, HLA-DRB1 low/high resolution 99.2/99.0%, HLA-DQB1 low/high resolution 99.3/97.5%. HLA crossmatch (T cells) was reported by 44-49 laboratories, and the use of sensitive methods was increased: AHG 33 laboratories and flow cytometry 7 laboratories. For incompatible (positive) crossmatches, 4.9% (0-14.3%) of cytotoxicity tests and 7.1% (0-16.7%) of flow tests were reported as negative. PRA was reported by 5 laboratories only. CONCLUSIONS: The use of DNA tests for HLA typing and AHG or flow cytometry methods for HLA crossmatch tests has much increased compared to the previous report. A continuous survey program would play an important role in the standardization and maintenance of laboratory proficiency in histocompatibility testing in Korea.
Consensus ; DNA ; DNA Fingerprinting ; Flow Cytometry ; Histocompatibility Testing* ; HLA-A Antigens ; HLA-B Antigens ; HLA-DR Antigens ; HLA-DRB1 Chains ; Korea