Ⅱ类人白细胞抗原等位基因与晚期肝脾型日本血吸虫病的相关性研究

目的　探讨Ⅱ类人白细胞抗原 (HLA-Ⅱ)基因多态性与晚期肝脾型日本血吸虫病的相关性。　方法　用聚合酶链反应-序列特异性引物 (PCR-SSP)技术对 46例晚期肝脾型日本血吸虫病患者 (实验组 )和 43例慢性日本血吸虫病患者 (对照组 )HLA-DRB1、DPA1、DQA1和DQB14个基因位点的等位基因进行分型。对两组间等位基因频率的差异进行 χ² 检验。　结果　实验组HLA-DRB1*04、DPA1*0103、DQA1*0601和DQB1*020 1等位基因频率明显高于对照组 ,而HLA-DQA1*0501和DQB1*0601等位基因频率明显低于对照组。　结论　HLA-DRB1*04、DPA1*0103、DQA1*0601和DQB1*0201等位基因 ,因其与晚期肝脾型日本血吸虫病呈显著的正相关 (P <0.0 5 )而可能是该病的遗传易感基因 ,而HLA-DQA1*0501和DQB1*0601等位基因与对该病存在抵抗性有关。     

中国人群1型糖尿病HLA-DQ基因多态性的Meta分析

目的　综合评价中国人群HLA DQ基因多态性与 1型糖尿病 (DM)的关联性。方法　以 1型DM组和健康对照组的各HLA DQ等位基因频数(基因型频数、单倍型频数 )分布的OR值为统计量,全面检索相关文献;应用Meta分析软件包REVMAN4. 2,在基因分型水平上,对各研究的结果进行一致性检验和数据合并,并评估发表偏倚。结果　等位基因DQA1* 0301、DQA1* 0501、DQB1* 0201、DQB1* 0303、DQB1* 0401和DQB1* 0604是中国人群 1型DM的危险基因 (均P<0. 05), 他们的合并OR值分别为2. 83、2. 90、4. 17、1. 65、2. 00和 3. 00;基因型 (或单倍型 )DQA1* 0301 /DQB1* 0201、DQA1* 0301 /DQB1*0302、DQA1* 0501 /DQB1* 0201、DQA1* 0301 /DQB1* 0201 /DRB1* 0301和DQB1* 0302 /DRB1* 0405是中国人群 1型DM的危险基因型(或单倍型,均P<0. 05),他们的合并OR值分别为 8. 95、3. 09、6. 01、6. 57和 14. 85。而等位基因DQA1* 0101、DQA1* 0102、DQA1* 0103、DQA1* 0104、DQA1* 0201、DQA1* 0401、DQA1* 0601、DQB1* 0301、DQB1* 0501、DQB1* 0503、DQB1* 0601和DQB1* 0602是中国人群 1型DM的保护等位基因(均P<0. 05),他们的合并OR值分别为 0. 47、0. 38、0. 21、0. 07、0. 44、0. 39、0. 44、0. 19、0. 33、0. 32、0. 42和 0. 28; 基因型     

HLA-DRB1、DQB1基因与汉族哮喘的相关性研究

探讨 HL A- DRB1、DQB1位点基因在中国汉族哮喘家系中与哮喘的相关性。用序列特异性引物 -聚合酶链反应 (PCR- SSP)方法 ,对 10 1例哮喘家系成员和 6 0例正常对照者进行了 HL A- DRB1、DQB1等位基因的分型 ,并分析了 DRB1、DQB1基因在两组中的分布。结果示 ,与正常对照组比较 ,哮喘患者组 DRB1* 15等位基因频率 (2 0 .93% )较正常对照组 (6 .6 7% )明显增高 (χ2 =10 .95 ,P<0 .0 5 ) ;DQB1* 0 6 0 1等位基因频率在哮喘患者组(31.4 0 % )较正常对照组 (7.5 % )明显增高 (χ2 =2 3.0 8,Pc<0 .0 1)。同时发现 HL A- DRB1* 0 7等位基因频率在对屋尘螨抗原皮试阳性家系成员中 (2 7.4 2 % )较家系中皮试阴性者 (5 .36 % )显著增高 (χ2 =10 .83,Pc<0 .0 5 )。HL A- DRB1* 15和 DQB1* 0 6 0 1可能是汉族哮喘的遗传等位易感基因 ,HL A- DRB1* 0 7在限定对屋尘螨抗原特异性 Ig E反应过程中起重要作用     

中国北方汉族人群人类白细胞抗原-DQA1及-DQB1基因第二外显子多态性与扩张型心肌病遗传易感性研究

目的:研究人类白细胞抗原(human leukocyte antigen,HLA)-DQA1,HLA-DQB1基因第二外显子多态性与我国北方汉族人群特发性扩张型心肌病(idiopathic dilated cardiomyopathy,IDC)的相关性及连锁关系。探讨特发性扩张型心肌病发病的免疫学机制及遗传易感性。 方法:采用聚合酶链反应-序列特异性引物法对68例特发性扩张型心肌病患者和15例特发性扩张型心肌病家系成员(n=83,IDC组)及100名健康个体(正常对照组)行HLA-DQA1,HLA-DQB1第二外显子基因分型;IDC组均接受超声心动图检测射血分数并据此分层:射血分数0.35-0.5者(n=21),射血分数0.15-0.34者(n=36)及<0.15者(n=26)。 结果:HLA-DQA1*0501基因和HLA-DQB1*0303基因频率在IDC组明显高于正常对照组。且该趋势随射血分数降低而愈趋明显,表现为HLA-DQA1*0501及HLA-DQB1*0303基因型在射血分数<0.15(阳性基因数分别为41和21)的特发性扩张型心肌病患者中分布高于射血分数≥0.15(阳性基因数分别为27和15)者。IDC组HLA-DQA1*0201基因频率和HLA-DQB1*0502、*0504基因频率明显低于正常对照组(P<0.05)。HLA-DQA1,HLA-DQB1基因与特发性扩张型心肌病家系连锁分析Lod值<1。 结论:HLA-DQA1*0501和HLA-DQB1*0303与我国北方汉族特发性扩张型心肌病患者遗传易感性相关;而HLA-DQA1*     

1型糖尿病与HLA-DQB1基因及自身抗体相关性研究

采用基因分型技术,确定32例1型糖尿病患者及23例正常对照的HLA-DQB1等位基因.用酶联免疫吸附法测定血清中谷氨酸脱羧酶抗体(GADA)、胰岛细胞抗体(ICA)及胰岛素自身抗体(IAA).结果在1型患者中,DQB1*0201、*0303、*0604等位基因频率显著高于对照(P＜0.05),DQB1*0301则低于对照(P＜0.05),其余DQB1等无显著性差异.等位基因为DQB1*0201的患者中GADA阳性率显著高于阴性率.结论在中国汉族人群中,DQB1*0201、*0303、*0604是1型糖尿病易感性等位基因,DQB1*0301是1型糖尿病保护性等位基因.DQB1*0201可能对GADA的产生起允许作用.     

云南汉族原发性高血压左室重构与HLA-DQAl等位基因的相关研究

目的探讨云南汉族原发性高血压(EH)左室重构包括左室肥厚(LVH)及左室扩大(LVD)与HLA-DQA1等位基因的相关性。方法对超声心动图诊断的云南汉族中43例高血压合并LVH患者(EH-LVH 组)与48例高血压非LVH患者(EH-LVH-组)、对16例高血压伴左室扩大患者(EH-LVD 组)与75例高血压不伴左室扩大患者(EH-LVD-组)分别进行病例-对照研究,采用PCR- SSP技术对其进行HLA-DQA1等位基因分型。结果(1)EH-LVH 组中DQA1*0302频率明显高于EH-LVH-组(18.8%vs 5.8%,χ~2=6.876,P<0.01;RR=3.73);EH-LVH 组中DQA1*0201频率明显低于EH-LVH-组(5.2%vs 24.4%,χ~2=13.671,P<0.01;RR=0.17);(2)HLA-DQA1等位基因频率在EH-LVD 组与EH-LVD-组的比较无统计学意义(P>0.05);(3)原发性高血压伴左室肥厚的易患因素是:病程、收缩压、DQA1*0302。结论云南汉族HLA-DQA1等位基因可能与高血压病左室重构中的心肌肥厚有关而与心腔扩大无明显相关。DQA1*0302可能是云南汉族EH-LVH的易感基因;DQA1*0201可能是EH-LVH的保护基因。病程长、收缩压高是原发性高血压伴左室肥厚的易患因素。     

中国HLA-DQ基因多态性与重症肌无力相关性的系统评价

目的运用循证医学系统评价我国人类白细胞抗原(HLA)-DQ基因多态性与重症肌无力(MG)之间的相关性。方法计算机检索Pubmed、Ovid、Embase、CBM、CNKI、万方数据库、VIP等,查找2016年6月前发表的关于我国HLA-DQ基因多态性与MG之间关联的文献。按Cochrane系统评价的方法,由两名研究者独立进行质量评价和资料提取,采用RevMan5.2软件进行Meta分析。结果共纳入15篇文献,样本量为2 364例,其中病例组(MG组)1 073例,健康对照组1 291例。Meta分析结果示:增加重症肌无力风险的HLA-DQ等位基因有:HLA-DQA1*0102[OR=1.43,95%CI(1.14,1.81)]、HLA-DQB1*0301[OR=1.62,95%CI(1.29,2.03)]、HLA-DQB1*0501[OR=1.53,95%CI(1.16,2.01)];降低重症肌无力风险的HLA-DQ等位基因有:HLA-DQA1*0201[OR=0.61,95%CI(0.45,0.83)]、HLA-DQB1*0601[OR=0.55,95%CI(0.44,0.69)]、HLA-DQB1*0602[OR=0.49,95%CI(0.38,0.62)]。结论中国人群,重症肌无力的易感基因HLA-DQA1*0102、HLA-DQB1*0301、HLA-DQB1*0501,而HLA-DQA1*0201、HLA-DQB1*0601、HLA-DQB1*0602为重症肌无力的保护基因。     

扩张型心肌病心力衰竭患者HLA-DQA1及-DQB1基因多态性研究

目的研究人类白细胞抗原(HLA)-DQA1,-DQB1基因多态性对扩张型心肌病(IDC)心力衰竭患者心功能的影响.探讨IDC发病的免疫学机制及遗传易感性.方法采用PCR-SSP方法对68例无血缘关系、长期居住在中国北方地区的汉族IDC患者和4个IDC家系成员及100名健康者进行HLA-DQA1,-DQB1基因分型;IDC组所有研究对象均接受超声心动图检测心脏射血分数(EF值)并据此进行分层EF值35%～50%者为亚组1,EF值15%～35%者为亚组2,＜15%者为亚组3.结果HLA-DQA1*0501基因和HLA-DQB1*0303基因频率在IDC组(分别为0.3889和0.1806)明显高于正常对照组(分别为0.0900和0.0364),OR值分别为5.20(95%CI3.60-8.50)和4.85(95%CI2.56-9.39).且该趋势随射血分数降低而愈趋明显,表现为HLA-DQA1*0501及HLA-DQB1*0303基因型在EF值＜15%的IDC患者中分布高于EF值≥15%者.相反,IDC组HLA-DQAl*0201基因(0.2000比0.0139)和HLA-DQB1*0502(0.0727比0.0139)、*0504(0.1091比0.0417)基因明显低于正常对照组(P＜0.05).IDC组中HLA-DQAI*0501基因型患者与IDC组中其他基因患者相比,临床心力衰竭症状较重,EF值明显降低(P＜0.01).HLA-DQB1各基因型间EF值未见统计学差异.HLA-DQA1,-DQB1基因与IDC家系连锁分析LOD值＜1.结论HLA-DQA1*0501和HLA-DQB1*0303与我国北方汉族IDC患者遗传易感性相关;而HLA-DQA1*0201和-DQB*0502、*0504则是IDC的保护基因.DQB1基因外显子第57位的丝氨酸对IDC具有保护性,其缺失或取代有可能造成IDC易患倾向.HLA-DQ基因多态性可作为IDC的遗传标记.     

1型糖尿病与HLA—DQB1基因及自身抗体相关性研究

采用基因分型技术,确定32例1型糖尿病患及23例正常对照的HLA-DQB1等位基因。用酶联免疫吸附法测定血清中谷氨酸脱羧酶抗体（GADA）、胰岛细胞抗体（ICA）及胰岛自身抗体（IAA）。结果在1型患中,DQB1*0201、*0303、*0604等位基因频率显高于对照（P＜0.05),DQB1*0301则低于对照（P＜0.05),其余DQB1等无显性差异。等位基因为DQB1*0201的患中GADA阳性率显高于阴性率。结论：在中国汉族人群中,DQB1*0201、*0303、*0604是1型糖尿病易感性等位基因,DQB1*0301是1型糖尿病保护性等位基因。DQB1*0201可能对GADA的产生起允许作用。     

DQB1等位基因多态性与乙肝后肝硬化的遗传易感性研究

目的研究HLA-DQB1等位基因多态性与肝硬化的遗传易感性,为寻找肝硬化的易感基因或抗病基因提供线索.方法应用PCR-SSP技术检测106例湖北汉人乙肝后肝硬化患者和108例正常人HLA-DQB1等位基因,并结合临床资料进行比较分析.结果肝硬化组DQB1*0501等位基因频率明显升高(24.52%vs 11.11%,RR=2.6,P＜0.01),DQB1*0602等位基因频率明显下降(4.7%vs 12.03%,RR=0.3618,P＜0.05),其他等位基因频率在两组之间无显著性差异.提示DQB1*0501等位基因与湖北地区汉人乙肝后肝硬化关联,DQB1*0602等位基因则呈负关联.结论DQB1*0501等位基因可能是湖北地区汉族人乙肝后肝硬化的易感基因,DQB1*0602则为抵抗基因.     

The HLA–DQ associations with Graves' disease in Chinese children

OBJECTIVE: Graves' disease has been documented to be associated with different HLA genes in Caucasians and Chinese adults. The incidence of childhood Graves' disease has been reported to be high in Hong Kong Chinese. The aims of this study were to examine the HLA-DQA1 and DQB1 associations with Graves' disease in Chinese children. PATIENTS AND DESIGN: Sixty-seven Chinese children with Graves' disease (59 girls and 8 boys) and 51 racially matched healthy controls were recruited for the study. Genomic DNA was extracted from venous blood samples. HLA-DQ typings were determined by sequence-specific oligonucleotide probing of the respective enzymatically amplified gene. Frequencies of HLA-DQ alleles at each locus were compared between patients and controls using the chi 2-test. RESULTS: The frequency of HLA-DQB1.0303 was increased in the combined male and female patient group [53.7%; relative risk (RR) = 4.22; Pc = 0.005] and female patients (50.8%; RR = 3.76; Pc = 0.018) compared with that in the entire control group (21.2%). HLA-DQB1*201 was protective for Graves' disease (10.4%; RR = 0.20; Pc = 0.006). In contrast to studies in Caucasians, DQA1*0501 was not associated with susceptibility for Graves' disease in Chinese children. CONCLUSIONS: This study confirms that DQB1*0303 is a race-specific susceptible allele for Graves' disease in Chinese. Both susceptible and protective HLA-DQ alleles for Graves' disease in Chinese children are different from those in Caucasians.     

Genetic analysis of dilated cardiomyopathy--HLA and immunoglobulin genes may confer susceptibility.

To identify genetic factors in the immune system which control the susceptibility to dilated cardiomyopathy (DCM), HLA class II DNA typing was performed in 61 Japanese patients, using PCR/SSO probe analyses. The frequencies of HLA-DQB1*0503 (15% vs 5%; RR = 3.06, chi 2 = 7.19) and DQB1*0604 (21% vs 10%; RR = 2.41, chi 2 = 6.20) were significantly increased and that of HLA-DQB1*0502 (RR = 1.74) was slightly increased in the DCM patients. The frequency of DQB1*0303 (16% vs 31%; RR = 0.44, chi 2 = 5.16) was significantly decreased in the patients. The increased HLA-DQB1 alleles have a histidine residue in common at the 30th codon for the HLA-DQ beta chain. Among the genetic markers studied by Southern blot analyses, IGLV (immunoglobulin lambda light chain, pV3.3) showed a strong association with DCM, i.e. A2/A2 genotype was found in 37.7% of patients whereas it was observed in only 18.9% of the control subjects (RR = 2.6, chi 2 = 7.77). The frequency of this genotype was higher in patients under age 45 years at the time of diagnosis (45.5%, RR = 3.6, chi 2 = 10.02). These results suggest that HLA and immunoglobulin genes are closely linked to susceptibility to DCM.     

人类白细胞抗原与风湿热和风湿性心瓣膜病易感性研究

为探讨人类白细胞抗原（ＨＬＡ）－ＤＱＡ１基因与风湿热（ＲＦ）和风湿性心脏病（ＲＨＤ）患者发病中宿主的遗传关联，选择无亲缘关系的广东籍汉族健康人１０６例和５４例ＲＦ／ＲＨＤ患者，应用聚合酶链反应－聚丙烯酰胺凝胶电泳（ＰＣＲ－ＰＡＧＥ）法，结合高灵敏的银染色作ＨＬＡ－ＤＱＡ１等位基因分型。发现本方法检测的６种ＤＱＡ１等位基因中，ＲＦ／ＲＨＤ组ＤＱＡ１＊０１０１（３１．４８％，相对危险率ＲＲ＝２．８９，Ｐ＜０．００５，病因系数ＥＦ＝０．２０６）明显增高，而ＤＱＡ１＊０１０２（１．８５％，ＲＲ＝０．１０６，Ｐ＜０．００５，预防分数ＰＦ＝０．１３４）显著下降；ＤＱＡ１的两种基因型（＊０１０１／０３０１和＊０１０１／０４０１）在病人组显著增高，而ＤＱＡ１的＊０１０２／０３０１基因型比健康人组明显下降（Ｐ＜０．００５）。上述结果显示：ＨＬＡ－ＤＱＡ１＊０１０１对ＲＦ／ＲＨＤ有遗传易感作用，而ＤＱＡ１＊０１０２有遗传抵抗作用；ＤＱＡ１基因型检测可能为预测ＲＦ／ＲＨＤ易感者提供理论依据。     

HLA-DQA1*0101 haplotypes and disease outcome in early onset pauciarticular juvenile rheumatoid arthritis.

To further investigate a clinical impression that patients with early onset pauciarticular juvenile rheumatoid arthritis (EOPA-JRA) who carry HLA-DQw1 have more severe arthritis, we subtyped HLA-DQw1 in American midwestern patients with EOPA-JRA. The HLA-DQA1*0101 subtype was present in 10 of 19 patients who developed persistent polyarticular erosive disease compared with 18 of 92 healthy controls (chi 2 = 9.13, p = 0.003, RR = 4.6), and occurred more frequently in this polyarticular group than in patients without polyarticular erosive disease (chi 2 = 4.11, p = 0.040, RR = 3.0). The presence of HLA-DQA1*0101 was significantly lower in patients with chronic iridocyclitis than in patients without chronic iridocyclitis (chi 2 = 7.07, p = 0.008, RR = 0.21). In HLA-DQA1*0101 positive patients, DNA sequences of the beta-1 domain of the HLA-DQ alpha and HLA-DQ beta genes (HLA-DQA1*0101, HLA-DQB1*0501 and HLA-DQB1*0503) were identical to those in controls. In this midwestern EOPA-JRA population, HLA-DQA1*0101 or genes in linkage disequilibrium with it, are associated with a cohort of patients with EOPA-JRA with distinct clinical characteristics.     

The association of HLA-DRB, DQA1, DQB1 alleles and haplotype frequency in Iranian patients with pulmonary tuberculosis.

OBJECTIVES: To investigate HLA-DRB1, DQA1 and DQB1 allelic polymorphism in Iranian patients with pulmonary tuberculosis (PTB). METHODS: Forty patients with smear-positive PTB and 100 healthy individuals as a control group were studied for MHC class II allelic polymorphism by polymerase chain reaction with sequence-specific primers (PCR-SSP). The primer was supplied by biotest in the standard kit. DRB low resolution SSP and DQA, DQB intermediate resolution SSP was applied. RESULTS: The comparison of the patients and the control group showed a significant increase in the frequency of the HLA-DRB1*07 and DQA1*0101 alleles (OR 2.7, 95%CI 1.19-6.13, P = 0.025 and OR 2.66, 95%CI 1.15-6.44, P = 0.04, respectively) in the patient group. The frequency of DQA1*0301 and DQA1*0501 was also significantly decreased (OR 0.254, 95%CI 0.075-0.865, P = 0.033 and OR 0.53, 95%CI 0.3-0.95, P = 0.045, respectively) in the PTB patients. Concerning haplotype frequency, DRB1*11501, QDQA1*0103 and DQB1*0601 were increased, but this difference was not statistically significant. In the DQB1 locus, DQB1*0501 was non-significantly over-represented. CONCLUSIONS: HLA-DRB1*07 and HLA-DQA1*0101 appeared to be the predisposing alleles and HLA-DQA1*0301 and 0501 the protective alleles in our patients with TB.     

HLA-DRB3*0101 is associated with Graves' disease in Jamaicans

OBJECTIVES: Graves' disease is associated with different human leucocyte antigen (HLA) genes in different populations. This studywasdesigned to examinethe HLA class II associations with Graves' disease in Jamaicans. PATIENTS: One hundred and six Jamaicans with Graves' disease and 104 controls. DESIGN: Oligotyping for HLA-DRB1, DRB3, DQA1 and DQB1 alleles was performed using the polymerase chain reaction sequence specific oligonucleotide probe (PCR-SSOP) technique. RESULTS The frequency of HLA-DRB3 *0101 was increased significantly in the patients compared to controls (38.7% vs. 19.2%; RR = 2.72; Pc < 0.015). The protective alleles for Graves' disease were DRB1 *0901 (0.9% vs. 20.2%; RR = 0.04; Pc < 0.001), DRB1*1001 (0.0% vs. 11%; RR = 0.0%; Pc < 0.01) and DRB4 *0101 (0.0% vs. 12.5%; RR = 0.0; Pc < 0.05). A high female to male ratio of Graves' disease, 25 :1, was observed. Other associated autoimmune diseases were rare and no significant HLA class II associations were found with clinical markers of disease. CONCLUSIONS: Jamaican patients with Graves' disease share the DRB3 *0101 susceptible allele and the DRB4 *01 protective allele but not the susceptible haplotype DRB1 *0301, DRB3*0101, DQA1*0501 with Caucasians.     

The prevalence of human leukocyte antigen (HLA) DR/DQ/DP alleles in Kuwaiti children with oligoarticular juvenile idiopathic arthritis

We have determined the prevalence of human leukocyte antigen (HLA)-DR, DQ and DP alleles in Kuwaiti children with oligoarticular juvenile idiopathic arthritis (OA-JIA) and healthy controls using the PCR-SSP (sequence specific primers) method. The analysis took into account the presence of antinuclear antibodies and chronic anterior uveitis. DRB1*03 (RR 2.20, P<0.001), DRB1*08 (RR 5.280, P<0.026), DQA1*0501 (RR 1.930, P<0.001), DQB1*0304 (RR 7.920, P<0.002), DQB1*0501 (RR 3.080, P<0.007) and DPB1*0101 (RR 8.8, P<0.001) were the main HLA alleles associated with OA-JIA in Kuwaiti Arabs in this study. DRB1*03 was detected in 71% of children with positive ANA, and in 50% of children with anterior uveitis. DQA1 alleles *0501, *0103 and *0105 (P<0.001; 0.029 and 0.024 respectively) were found to be associated with OA-JIA. In contrast, DQA1*0301 and DQA1*0302 alleles appear to be protective in Kuwaiti children (RR 0.153, P<0.001 and RR 0.278, P<0.016 respectively). The DQB1 alleles *0304 and *0501 were associated with OA-JIA (P<0.002 and P<0.007 respectively). In the case of DPB1, only one allele (*0101) was associated with OA-JIA (P<0.001). Most Kuwaiti Arab patients with OA-JIA who carried a DQ or DP susceptibility allele also had an accompanying DRB1*03 or *8 allele.     

Association between human leukocytes antigen alleles and chronic hepatitis C virus infection in the Korean population.

BACKGROUND/AIM: Recent data have shown that the clinical outcome of hepatitis C virus (HCV) infection may be influenced by the host genetic factor. The aim of this study was to investigate whether particular human leukocytes antigen (HLA) molecules are associated with the susceptibility to HCV infection in the Korean population. METHODS: One hundred and thirty-seven patients with chronic HCV infection and 206 normal individuals were examined for HLA class I and II molecules. RESULTS: In class I antigens, the frequencies of HLA-A3 (relative risk (RR)=3.5, P<0.04), HLA-B35 (RR=2.0, P<0.03), and HLA-B46 (RR=2.5, P<0.02) significantly increased in chronic HCV carriers compared with the controls. The frequencies of DRB1*0803, DQB1*0601 and DQB1*0604 were significantly higher in chronic HCV carriers than in controls (RR=2.5, P<0.005; RR=1.8, P<0.05; RR=1.9, P<0.04, respectively). On the other hand, the frequencies of DRB1*0301, DQA1*0501 and DQB1*0201 were significantly lower in chronic HCV carriers than in normal controls (RR=0.2, P<0.03; RR=0.4, P<0.004; RR=0.5, P<0.02, respectively). The haplotype DRB1*0803-DQB1*0601 significantly increased (RR=2.5, P<0.02) while the DQA1*0501-DQB1*0201 significantly decreased (RR=0.2, P<0.03) in chronic HCV carriers compared with normal controls. In stratification analysis to investigate the interrelationships among the associated alleles, DRB1*0803 and DQB1*0601 were associated with HLA-B46, particularly in patients with chronic HCV carriers. CONCLUSIONS: These results suggest that particular HLA alleles may have an influence on chronic HCV infection as a host genetic factor in the Korean population.