儿童银屑病与HLA-Ⅰ类抗原相关性的研究

目的探索儿童银屑病与HLA-Ⅰ类抗原的相关性.方法采用国际标准微量淋巴细胞毒法对52例银屑病患儿(＜12岁)和107例健康儿童进行了HLA-A、B抗原测定.结果发现HLA-A1、B13抗原频率明显升高,HLA-A9、A19、B15频率明显降低.结论儿童银屑病发病与HLA-A1、B13抗原密切相关,HLA-B13抗原携带者发病较早.     

HLA抗原与银屑病

自从1972年Russell^①及White^②等报道了HLA-B17与银屑病明显相关后,Krain等(3-6)相继进行了HLA与银屑病相关的研究,进一步指出银屑病患者HLA-B13,HLA-B17的抗原频率明显增高.     

HLA-C基因分型与皖籍汉族人寻常性银屑病关系的研究

目的　探讨皖籍汉族人寻常性银屑病 (PsV )与HLA C等位基因的相关性。方法　运用聚合酶链反应 -序列特异性引物 (PCR SSP)法 ,对 166例皖籍PsV患者和 2 48例健康对照进行HLA C基因分型。结果　①PsV患者组HLA Cw 0 60 2等位基因频率较对照组显著升高 (OR =4.13 ,95 %可信限 2 .3 8～ 7.16,Pc <0 .0 1) ,但HLA Cw 0 3 0 4等位基因频率则较对照组明显减低 (OR =0 .3 2 ,95 %可信限 0 .17～ 0 .60 ,Pc <0 .0 1) ;②早发型PsV (I型银屑病 )及有PsV家族史患者携带HLA Cw 0 60 2等位基因频率分别高于迟发型PsV (II型银屑病 )及无PsV家族史患者 (OR =4.3 2 ,95 %可信限 2 .44～ 7.67,Pc <0 .0 1和OR =13 .2 8,95 %可信限 6.12～ 2 9.11,Pc <0 .0 1)。结论　皖籍汉族人PsV与HLA Cw 0 60 2等位基因高度关联 ,且携带该等位基因的个体易发生早发型银屑病 ,并有家族倾向性。     

银屑病的遗传学

人群特异HLA单倍型的分析已经证明了银屑病易患决定因素与MHC的Ⅰ类和Ⅱ类区连锁。研究还显示,银屑病由临床上相似的两个不同的疾病类型(即Ⅰ型和Ⅱ型银屑病)组成,它们的HLA单倍型不同。Ⅰ型银屑病HLA A2 Cw6 B57明显升高,而Ⅱ型则HLA Cw2较     

北方汉族寻常型银屑病与HLA等位基因的关联研究

目的:研究中国北方汉族寻常型银屑病(PsV)与HLA等位基因的关联性。方法:采用序列特异性引物-聚合酶链反应(PCR-SSP)方法检测91例PsV患者和102例健康人HLA-A、B、Cw、DRB1及DQB1等位基因。结果:(1)PsV患者HLA-A*0101-03、A*3001-04、B*5701、Cw*0602、Cw*0603/04/05、DRB1*0701/02及DQB1*0201基因频率较正常对照显著增高;Cw*0401基因频率显著下降(Pc<0.05)。(2)I型PsV患者HLA-A*0101-03、A*3001-04、B*5701、Cw*0602、DRB1*0701/02及DQB1*0201基因频率显著增高,而B*51、Cw*0401、DQB1*0301基因频率显著下降;Cw*0603/04/05基因频率在I型及II型PsV患者均显著增高(Pc<0.05)。有家族史PsV患者HLA-A*3001-04、DRB1*0701/02及DQB1*0201基因频率显著增高;无家族史患者Cw*0602基因频率显著增高,而DQB1*0501-04基因频率显著下降(Pc<0.05)。(3)HLA-A*3001-04、DRB1*0701/02及DQB1*0201基因频率仅在男性PsV患者显著增高;B*5701、Cw*0602基因频率仅在女性患者显著增高(Pc<0.05)。结论:(1)HLA-A*0101-03、A*3001-04、B*5701、Cw*0602、Cw*0603/04/05、DRB1*0701/02及DQB1*0201基因可能是北方汉族PsV的易感基因或与易感基因相连锁。(2)HLA-Cw*0401基因可能是阻止北方汉族PsV发病的“保护因子”。(3)I型或II型、有或无家族史PsV在遗传背景上存在差异。     

河南地区汉族人银屑病与HLA—Cw0602等位基因的关联研究

目的：分析河南地区汉族人银屑病与HLA—Cw＊0602等位基因的相关性。方法：运用聚合酶链反应一序列特异性引物（PCR—SSP）法检测河南地区汉族人200例寻常型银屑病患者和200名健康对照的HLA—Cw＊0602等位基因频率,并分析携带该基因的银屑病患者与家族史的关系。结果：病例组HLA—Cw＊0602等位基因频率较对照组显著升高（73％VS24％,P=0．000）,但无性别差异;携带HLA—Cw＊0602等位基因的银屑病患者发病年龄早于不具有该等位基因的患者（80．2％VS28．6％,P=0．001）;有银屑病家族史患者携带HLA—Cw＊0602等位基因的频率与无银屑病家族史者差异无显著性（P=1．000）。结论：HLA—Cw＊0602等位基因与河南地区汉族人银屑病易感性高度关联。携带该等位基因的银屑病患者易为早发型,但不能确定有家族倾向性。     

北方汉族银屑病家系HLA基因复合体相关研究

目的研究与中国北方汉族银屑病存在基因易感性的HLAⅠ类基因的分布,并分析与银屑病相关的HLA易感单倍型。方法将核心家系成员分为银屑病患者组(27例)和对照组(9例),应用序列特异性引物-聚合酶链反应扩增HLAⅠ类等位基因。HLA各位点等位基因频率以及基因型频率分布采用直接计数法计算,并做Hardy-Weinberg吻合度检验。两组间的等位基因频率的比较采用四格表x~2检验,HLA各位点间连锁不平衡关系应用连锁不平衡参数计算法。结果在两组受检者中,发现HLA-B*37、HLA-Cw*0602在患者中分布频率高于对照组,是该病的致病基因,HLA-B*48在患者组中分布频率低于对照组,是该病的保护基因。发现在银屑病患者组中有显著性连锁不平衡的HLA单倍型9条。结论证实了HLA基因复合体与银屑病之间存在密切关联。     

HLA抗原与银屑病

自从1972年Russell①及White②等首先报导了HLA-B17与寻常型银屑病明显相关后,国外许多学者对寻常型银屑病、关节炎型银屑病及脓疱型银屑病与HLA抗原相关性进杆了研究.     

HLA-B51抗原与白塞病临床特征的相关性研究

目的 :　探讨HLA B5 1与白塞病 (BD)临床特征的相关性。方法 :　应用微量淋巴细胞毒试验 ,对 2 7例BD患者和 30例健康人的HLA A和HLA B抗原进行研究。结果 :　BD患者和对照组HLA -B5 1的阳性频率分别为 6 3%和 16 .7% (χ2 =12 .9,P <0 .0 0 1,Pc <0 .0 5 ,RR =8.5 )。其中 ,HLA -B5 1阳性的男性患者的相对危险度 (RR)高于女性患者 (分别为 17.39和 4 .2 9) ,两者相比存在差异 (χ2 =4 .2 0 ,P <0 .0 5 )。未发现BD患者的其他临床特征与HLA B5 1有相关性。结论 :　提示HLA B5 1是BD的易感基因 ,并与男性患者密切相关     

CTLA-4基因启动子区域多态性与寻常型银屑病的相关性

目的: 探讨CTLA-4基因启动子区-1722位点(T/C)多态性和-1661位点(A/G)多态性与中国汉族人群寻常型银屑病的相关性.方法: 采用聚合酶链反应(PCR)-限制性片段长度多态性(RFLP)方法,对87例寻常型银屑病和116例中国汉族正常对照者进行CILA-4基因-1722位点和-1661位点多态性检测.结果: 与正常对照组比较,银屑病患者CTLA-4基因-1661位点A/G+G/G基因型频率显著升高(P=0.003);G等位基因基因型频率显著升高(P=0.002);G等位基因携带者也是明显高于对照组(P=0.003).结论: CTLA-4基因启动子区-1661位点G等位基因与中国汉族寻常型银屑病显著相关.     

Association of HLA class I alleles with psoriasis vulgaris in southeastern Chinese Hans

BACKGROUND: Predisposing genetic factors in psoriasis include associations with human leukocyte antigen (HLA). Accumulative evidence has shown that certain HLA at class I locus, especially HLA-Cw6, are associated closely with psoriasis. OBJECTIVE: To evaluate the association of HLA class I alleles with susceptibility to psoriasis in the southeastern Chinese Han population. METHODS: We performed genotype for HLA-A, -B and -C loci in 166 patients with psoriasis vulgaris by means of polymerase chain reaction with sequence-specific primers technique. The distribution of HLA allelic frequencies was further analyzed according to age of onset, i.e. under 35-y and beyond 35-y groups. These data were compared with the healthy controls of 204 unrelated Hans. RESULTS: The frequencies of HLA-A*26 (24.7% vs. 13.1%, OR=2.36, Pc<0.01), -B*13 (27.2% vs. 14.8%, OR=2.34, Pc<0.01), -B*27 (12.2% vs. 4.0%, OR=3.49, Pc<0.01) and -Cw*0602 (17.9% vs. 5.3%, OR=4.20, Pc<0.001) were significantly increased in psoriasis patients, whereas HLA-Cw*0304 frequency (4.9% vs. 13.4%, OR=0.32, Pc<0.01) was highly decreased, when compared to the controls. HLA-A*26-B*27-Cw*0602 was identified as a high-risk haplotype of HLA class I in developing psoriasis in the test. HLA-Cw*0602 was found to be strongly associated with the early-onset psoriasis (age of onset <35 y). CONCLUSION: This study demonstrated the positive associations of HLA class I markers with psoriasis vulgaris, of which HLA-Cw*0602 was the strongest susceptibility determinant for development of early-onset psoriasis, in the southeastern Chinese Han population.     

A new extended haplotype Cw*0602-B57-DRB1*0701-DQA1*0201-DQB1*0201 associated with psoriasis in the Croatian population

In this study, we have analysed the distribution of HLA class II alleles and the extended haplotype HLA-Cw-B-DRB1-DQA1-DQB1 in Croatian patients with type I and type II psoriasis by hybridization with specific oligonucleotide probes. Type I psoriasis showed a significant association with the DRB1*0701 [P < 0.00001; relative risk (RR) = 5.83], DQA1*0201 (P < 0.00001; RR = 6.12), DQB1*0201 (P = 0.0006; RR = 3.29) and DQB1*0303 alleles (P = 0.0008; RR = 7.51). A negative correlation with type I disease was observed for the DQA1*0102 allele (P = 0.002; RR = 0.26). Type II psoriasis did not show any association with any class II alleles. The extended haplotype HLA-Cw*0602-B57-DRB1*0701-DQA1*0201-DQB1*0201 was present at a significantly higher frequency in type I patients (P < 0.00001; RR = 7.72). However, this haplotype was not detected at all in patients with type II psoriasis. In conclusion, the extended haplotype HLA-Cw*0602-B57-DRB1*0701-DQA1*0201-DQB1*0201 is a risk haplotype for type I disease in the Croatian population. This particular haplotype has not been reported previously in association with psoriasis in any other ethnic groups.     

Analysis of HLA antigens in Croatian patients with psoriasis

In common with most autoimmune diseases, psoriasis is associated with some HLA antigens. We studied the distribution of HLA antigens in Croatian patients with psoriasis: 108 patients were divided into groups according to family history and age of disease onset. HLA antigens were analyzed serologically and HLA-C alleles were analyzed using polymerase chain reaction. We found significant increases in HLA-A2, -B17, -B37 and -B13 antigens and highly significant increases in HLA-Cw*0602 and DR7 antigens in psoriatic patients compared with controls. Patients with type I psoriasis (early onset, positive family history) showed highly significant associations with Cw*0602 [p < 0.00001; relative risk (RR) = 14.45] and DR7 (p < 0.00001; RR = 15.09) antigens. Patients with type II psoriasis (late onset, no family history) had a significant association with Cw*03 antigen (p = 0.008; RR = 0.17). In conclusion, HLA-B13, -B17, Cw*0602 and -DR7 antigens are associated with a significant risk of psoriasis in the Croatian population and the Cw*0602 allele has the strongest association, especially for type I psoriasis.     

Psoriasis vulgaris in Chinese individuals is associated with PSORS1C3 and CDSN genes

BACKGROUND: Besides the HLA-Cw*0602 allele, the psoriasis susceptibility 1 candidate 3 (PSORS1C3) and corneodesmosin (CDSN) genes are two probable psoriasis susceptibility genes in the PSORS1 locus. The -79C, -26C and +246A alleles of the PSORS1C3 gene, the CDSN*971T allele, CDSN*TTC (619T-1236T-1243C) and CDSN*5 (619T-1240G-1243C) are strongly associated with psoriasis in the caucasian population. Until now, no haplotype study of the PSORS1C3 and CDSN genes has been documented in Chinese patients with psoriasis vulgaris. OBJECTIVES: We aimed to determine whether genetic polymorphisms of the PSORS1C3 and CDSN genes were associated with an increased risk of psoriasis vulgaris in Chinese patients in Taiwan. METHODS: We investigated the PSORS1C3 and CDSN genes for disease association by direct sequencing in 178 patients with psoriasis vulgaris and 203 control subjects. Genotyping for HLA-Cw*0602, alpha-helix coiled-coil rod homologue (HCR) gene and single nucleotide polymorphism (SNP) n.9 was also carried out using a sequence-based typing method. RESULTS: The PSORS1C3*582A allele, an SNP in the 3'-untranslated region of the PSORS1C3 gene, was a major psoriasis vulgaris susceptibility allele in the Chinese population, and the association was much stronger in patients with early-onset psoriasis vulgaris (22.3% vs. 6.9%, odds ratio = 3.87, P(c) =0.0000072). The frequencies of CDSN*TTC and CDSN*971T were also significantly increased in patients with early-onset psoriasis vulgaris. Moreover, PSORS1C3*582A, SNP n.9*C, Cw*0602 and HCR*WWCC were in near complete linkage disequilibrium (LD) with each other; in contrast, the LD with the CDSN gene was not so strong. SNP n.9*C-Cw*0602-PSORS1C3*582A-HCR*WWCC was a major susceptibility haplotype in patients with early-onset psoriasis vulgaris (P < 10(-7)) and this risk haplotype also carried CDSN*TTC and CDSN*971T. CONCLUSIONS: The PSORS1C3 and CDSN genes are important psoriasis susceptibility genes in Chinese patients with psoriasis vulgaris.     

包头地区寻常性银屑病与HLA-Cw* 0602等位基因的相关性研究

目的探讨包头地区汉族寻常性银屑病患者与HLACw0602等位基因的相关性。方法采用聚合酶链反应序列特异引物(PCRSSP)法,检测52例寻常性银屑病患者及60名健康对照者的等位基因频率,并相互比较。结果①HLACw0602与包头地区汉族寻常性银屑病患者具有明显的相关性(OR=3.47,P<0.01);②HLACw0602在Ⅰ型、Ⅱ型寻常性银屑病患者中分布无差异(χ2=0.006,P>0.05)。结论HLACw0602可能是寻常性银屑病易感基因或与易感基因相连锁。     

Specific restriction fragment length polymorphism on the HLA-C region and susceptibility to psoriasis vulgaris

In psoriasis vulgaris, the HLA class I Cw6 specificity has previously been recognized as the most commonly associated antigen serologically. This study was carried out to investigate whether or not the gene controlling the susceptibility to psoriasis vulgaris existed on the HLA, especially the HLA-C region. At first, we analyzed the restriction fragment length polymorphism (RFLP) of 13 patients with psoriasis vulgaris and 6 healthy controls who were all positive for at least one allele of HLA-Cw6. To characterize RFLP in psoriasis patients who did not have HLA-Cw6, 12 patients and 10 healthy controls who had HLA-Cw7 were also examined. Southern hybridization of genomic DNA demonstrated that DNA polymorphisms of the HLA-C antigen gene could not be found in any psoriasis vulgaris patient whether HLA-Cw6 or Cw7. However, a 4.5 kb BamHI fragment and a 3.1 kb PstI fragment were lacking in some healthy controls who had either HLA-Cw6 or Cw7. This study suggests that the presence of RFLP in the HLA-C gene is associated with psoriasis vulgaris. These specific fragments may help predispose individuals to psoriasis vulgaris, or may be essential for the development of the disease.     

Fine mapping of the psoriasis susceptibility gene PSORS1: a reassessment of risk associated with a putative risk haplotype lacking HLA-Cw6

Human leukocyte antigen (HLA)-Cw6 has long been associated with psoriasis, and PSORS1 (psoriasis susceptibility 1), a major gene for psoriasis susceptibility, has been mapped to its vicinity. A previous analysis identified multiple risk haplotypes carrying HLA-Cw6 and one haplotype (cluster 17, HLA-Cw8-B65) that appeared to carry risk for psoriasis but did not carry HLA-Cw6. This haplotype was very similar to other risk haplotypes for at least 60 kb telomeric to HLA-C, suggesting identity by descent with the remaining risk chromosomes. The association, however, between psoriasis and this haplotype as assessed by the transmission/disequilibrium test (TDT) was of borderline significance (p-value 0.048). In order to better assess the risk associated with cluster 17, a multicenter collaboration typed additional subjects for a single marker (M6S161) for which one allele (249 bp) was found only on cluster 17. The new sample included 1275 pedigrees as well as 300 cases and 913 controls. Transmission of this allele to affected individuals was examined using the TDT and the pedigree disequilibrium test (PDT), and case-control samples were analyzed by a trend test across genotype categories. By all methods, the newly acquired genotypes failed to confirm the association originally reported, despite adequate power. In contrast, the 248 bp allele, which is found on all HLA-Cw6-positive risk haplotypes as well as several non-risk haplotypes, shows significant excess transmission for all cohorts. Taken together, these results indicate that cluster 17 does not carry a psoriasis-susceptibility allele, and expand the PSORS1 risk interval to approximately 300 kb.     

Association of psoriasis vulgaris with HLA class I and class II antigens in the Turkish population,according to the age at onset

BACKGROUND: Association of psoriasis vulgaris with HLA antigens reference to age at onset has been reported in different racial or ethnic populations. OBJECTIVE: Our purpose was to determine the distribution of HLA markers in the Turkish population according to the age at onset of the psoriasis vulgaris. METHODS: HLA class I and class II antigens were performed by serologic methods in a group of 100 Turkish patients with psoriasis and 201 control subjects. Patients with psoriasis were subdivided into two groups based on age at onset (below or above 40 years of age) and family history. RESULTS: The frequency of HLA A30, Cw3, Cw6, DR7, DR14, DQ8, and DQ9 antigens were significantly increased in the Turkish psoriatic patients whereas HLA A66, Cw2, Cw4 and DR11 were found to be negatively associated with psoriasis. However, there were striking differences in HLA antigens according to the age at onset of the disease. Type I, early onset was associated with a high frequency of A30, B50, Cw6 and DR7 antigens whereas patients with type II, late onset had an increased frequency of Cw7. CONCLUSIONS: We conclude that psoriasis is probably a genetically determined disease and suggest that HLA-Cw6 antigen seems to associate commonly with early onset of psoriasis in Turkish patients.     

Combined effects of HLA-Cw6, body mass index and waist-hip ratio on psoriasis vulgaris in Chinese Han population

BACKGROUND: Psoriasis is a chronic inflammatory skin disease associated with an HLA-Cw6 allele. Higher waist-hip ratio (WHR) and body mass index (BMI) may increase the risk of psoriasis vulgaris, but, to our knowledge, no evidence of the combined effects of HLA-Cw6 and BMI, WHR are available. OBJECTIVES: To evaluate the combined effect of HLA-Cw6, BMI and WHR on psoriasis vaulgaris. METHODS: The data of 466 patients and 177 controls were investigated and analyzed by a hospital-based case-control study and non-condition logistic regress model. RESULTS: There was a graded positive association of WHR and BMI with psoriasis vulgaris. Compared with a WHR of 0.80 or less than 0.80, the odds ratio (OR) was 2.36 (p<0.01) for WHR 0.80-0.85, and 2.74 (p<0.01) for WHR greater than 0.85. Compared with subjects with a BMI of 20 or less than 20, the multivariate OR of psoriasis were 1.20 (p>0.05) for a BMI of 20-25, 1.84 (p<0.05) for a BMI of more than 25 corresponding overweight (p for trend, <0.01). We found not only the risk of psoriasis for the individual with HLA-Cw6(+) was 8.33 times greater than that for individual with HLA-Cw6(-) but also the risk increased approximately 35 times in individuals with HLA-Cw6(+) and a overweight as compared with one with HLA-Cw6(-) and a non-overweight, and 17-fold when the individuals with HLA-Cw6(+) and a WHR of more than 0.80 were compared with individuals with HLA-Cw6(-) and a WHR of 0.80 or less than 0.80, displaying the combined effect of HLA-Cw6, BMI and WHR (all p<001). CONCLUSION: This study suggested that HLA-Cw6, overweight and higher waist-hip ratio are material risk factors of psoriasis vulgaris, specially the combined effects of HLA-Cw6 and BMI, WHR on psoriasis vulgaris in Chinese population.     

The association of psoriasis with human leukocyte antigens in Korean population and the influence of age of onset and sex

To identify HLA markers that may contribute to the genetic susceptibility of Koreans to psoriasis, we studied 84 psoriasis patients, with serologic HLA types of A, B, and genotypes of HLA-Cw, DRB1, DQA1, DQB1, DPB1 alleles. The distribution of HLA markers and the associated haplotypes were analyzed according to age and sex. HLA-Cw*0602 showed the strongest association with psoriasis (relative risk = 36.0, p < 10-8, Pc < 8 x 10-7). The frequencies of A1 (relative risk = 17.0, p < 9 x 10-7, Pc < 7 x 10-5), A30 (relative risk = 5.5, p < 2 x 10-5, Pc < 0.001), B13 (relative risk = 5.6, p < 4 x 10-6, Pc < 3 x 10-4), B37 (relative risk = 30.3, p < 7 x 10-7, Pc < 6 x 10-5), DRB1*07 (relative risk = 5.9, p < 2 x 10-6, Pc < 8 x 10-5), DRB1*10 (relative risk = 26.4, p < 4 x 10-6, Pc < 3 x 10-4), DQA1*02 (relative risk = 6.2, p < 5 x 10-7, Pc < 4 x 10-4), DQB1*02 (relative risk = 2.5, p < 0.005, Pc = ns) and DPB1*1701 (relative risk = 24.6, p < 9 x 10-6, Pc < 7 x 10-4) were also significantly increased in Korean psoriasis patients. Type I and type II psoriasis were subdivided into groups of below and above 30 y of age, because of the significant difference found in HLA-Cw*0602 phenotype frequency between the two groups (83.9% vs. 54.5%, p < 0. 009). In addition to HLA-Cw*0602, the frequencies of B37 and DPB1*1701 were significantly higher in type I as opposed to type II psoriasis. HLA-A30-B13-Cw*0602-DRB1*07-DQA1* 02-DQB1*02 was identified as a high risk haplotype. This was particularly true at an early age in the female. HLA-A33-B44-Cw*1401-DRB1*13-DQA1* 01-DQB1*06-DPB1*0401 was defined as a protective haplotype for psoriasis. The extended haplotype HLA-A1-B37-Cw*0602-DRB1*10-DQA1*01-DQB1*05 was discovered to be a high-risk factor in Koreans. To summarize, this study demonstrates the differential association of HLA according to sex, and identifies a newly found high-risk haplotype and a protective haplotype in Korean psoriasis patients.