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。     

银屑病中医证型与HLA等位基因的相关性

目的:探讨银屑病中医证型与人类白细胞抗原(HLA)-CW、-DRB1等位基因的相关性。方法:用序列特异性引物-聚合酶链反应(PCR-SSP)方法,对152例江苏籍汉族寻常性银屑病患者进行HLA-CW、-DRB1等位基因的分型,并分析上述基因在各组中的分布。结果:银屑病患者的两个等位基因阳性率均高于对照组,差异有统计学意义,HLA-CW*0602等位基因:OR=5.35,P0.05。HLA-DRB1*07等位基因:OR=3.49,P0.05。血热型基因阳性率与血瘀型基因阳性率相比,P=0.586,差异无统计学意义(P0.05)。结论:HLA-CW*0602与HLA-DRB1*07基因可能是江苏籍寻常性银屑病患者易感基因。银屑病患者的这两种基因与中医证型无相关性。     

安徽汉族人寻常性银屑病与HLA单倍型相关性研究

利用聚合酶链反应-序列特异性引物(PCR-SSP)法,对138例银屑病患者及149例健康对照进行PCR反应,分析单倍型的分布情况,探讨汉族人寻常性银屑病与HLA单倍型的相关性.     

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。     

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。     

包头地区汉族寻常型银屑病患者HLA-DQA1*0104等的检测

目的探讨包头市汉族寻常型银屑病患者与HLA-DQA1*0104等位基因的相关性。方法采用聚合酶链反应-序列特异引物(Polymerase chain reaction sequence specific primers,PCR-SSP)法检测75例寻常型银屑病患者及75例健康对照的等位基因频率,并相互比较。结果①HLA-DQA1*0104与包头市汉族寻常型银屑病患者具有明显的相关性(P<0.05,OR=3.45)。②HLA-DQA1*0104在Ⅰ型、Ⅱ型寻常型银屑病患者中分布无差异(χ2=0.076,P>0.05)。③HLA-DQA1*0104在有家族史和无家族史的患者分布有差别(P<0.05,OR=4.48)。结论①HLA-DQA1*0104可能是寻常型银屑病易感基因或与易感基因相连锁。②有家族史和无家族史寻常型银屑病患者在其遗传背景上存在有差异。     

吉林地区汉族寻常性银屑病患者HLA-DRB1等位基因检测

据调查我国寻常性银屑病患病率约为0.123%^[1].其病因尚未完全清楚,银屑病与HLA相关性研究引起人们的关注^[2].由于HLA等位基因存在着种族与地域分布间的差异,以及寻常性银屑病具有遗传异质性的特点^[3],本研究采用聚合酶链反应/序列特异性引物(PCR/SSP)基因分型方法对80例寻常性银屑病患者DNA标本进行HLA-DRB₁位点基因多态性分析,旨在探讨吉林地区汉族寻常性银屑病与HLA-DRB₁等位基因的相关性.     

兰州地区汉族寻常型、关节病型银屑病与HLA-DQB1*0201相关性研究

目的:分析兰州地区汉族寻常型、关节病型银屑病与HLA-DQB1*0201等位基因的相关性.方法:采用聚合酶链反应-序列特异引物(polymerase chain reaction sequence specific primers, PCR-SSP)法检测41例寻常型银屑病患者、27例关节病型银屑病患者和52名健康对照的等位基因频率.结果:寻常型银屑病患者组HLA-DQB1*0201等位基因频率较正常对照组显著增高;关节病型银屑病患者组HLA-DQB1*0201等位基因频率较正常对照组显著增高.结论:HLA-DQB1*0201等位基因可能是兰州地区汉族寻常型、关节病型银屑病的遗传标志.     

寻常型银屑病患者及正常人S100A6、S100A8、S100A9基因的研究

目的：通过测定家族性寻常型银屑病患者和正常人中S100A6、S100A8和S100A9基因的外显子编码区序列，探索其与银屑病发病的关系。方法：从家族性寻常型银屑病患者和正常人的外周血中提取基因组DNA，用自动测序法测定S100A6、S100A8和S100A9基因的外显子编码区序列。结果：患者和正常对照组的S100A6、S100A8、S100A9基因外显子编码区序列均相同，未发现基因多态性。结论：S100A6、S100A8、S100A9基因的外显子编码区序列与家族性寻常型银屑病发病无相关性。     

山东地区汉族寻常型银屑病与HLA-DRB1、DQB1等位基因的相关性研究

目的：探讨HLA-DRB1、DQB1位点基因与山东地区汉族寻常型银屑病的相关性。方法：用序列特异性引物-聚合酶链反应（PCR-SSP）方法,对98例山东汉族寻常型银屑病患者进行了HLA-DRB1、DQB1等位基因的分型,并分析了上述基因在各组中的分布。结果：寻常型银屑病患者组HLA-DRB1＊07、DQB1＊0201等位基因频率较正常对照组显著增高;I型寻常型银屑病HLA-DRB1＊07、DQB1＊0201等位基因频率较正常对照组显著增高;II型寻常型银屑病HLA-DRB1＊10基因频率较正常对照组显著增高。结论：HLA-DRB1＊07,HLA-DQB1＊0201和HLA-DRB1＊10可能是山东地区汉族寻常型银屑病的易感相关基因。     

HLA和寻常型银屑病相关的研究

我们调查了50个寻常型银屑病患者的HLA型和疾病相关性.结果表明HLA-B13(RR=3.74)和HLA-B17(RR=2.44)频率升高和国外报导的一致.而Aw19(RR=2.13)和Cw4(RR=6.35)频一率升高.Bw16(RR=0.17)和Cw3(RR=0.49)下降是本文首终担导,尚未见其他报告,期望同行们证实此发现.银屑病患者具有A1,B17的单倍型.A1与B17连锁,联系到A1,B17,B13抗原频率上升.可能这些抗原与银屑病易感基因相连锁.     

寻常性银屑病患者HLAⅠ类分子A、B、C位点甲基化的研究

目的探讨寻常性银屑病患者表皮中HLA Ⅰ类分子重链A、B、C位点启动子区甲基化与疾病的关系。方法 甲基化特异性PCR技术检测46例寻常性银屑病患者皮损和非皮损表皮中的HLAⅠ类分子重链A、B、C位点启动子区域CpG岛的甲基化率,与28例正常人皮肤组织进行对照研究。PASI评分评价银屑病患者皮损的严重程度。结果 在银屑病患者皮损、非皮损和正常人皮肤组织中,重链A位点均未检测到发生甲基化,B位点的甲基化率分别是4.35％( 2/46)、4.35％( 2/46)和0,C位点的甲基化率分别是4.35％ (2/46)、21.74％( 10/46)和0。3组样本比较,C位点启动子区甲基化率非皮损明显高于皮损和正常人皮肤组织,但与病情严重程度无关;HLA Ⅰ类分子重链A和B位点差异均无统计学意义。结论 寻常性银屑病患者HLA Ⅰ类分子C位点启动子区甲基化异常。     

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.     

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.     

Specific nucleotide sequence of HLA-C is strongly associated with psoriasis vulgaris

The association of specific HLA-C nucleotide sequences with psoriasis vulgaris was investigated in 75 Japanese patients by the polymerase chain reaction method, followed by slot-blot hybridization using two specific oligonucleotide probes. The synthesized nucleotide primers were C180P, 5'-GACCGGGAGACACAGAAGTACAAG-3' (coding for amino acid residues 61 to 68 of the alpha 1 domain of the HLA-C molecule) and C243PR, 5'-GCTCTGGTTGTAGTAGCCGCG-3' (residues 82 to 88), respectively. The amplified sequence detected with the probe C208A (5'-AGGCACAGGCTGACCGA-3'), including the coding region for alanine at position 73, was significantly increased in frequency in the patients compared with the healthy individuals (81% versus 48%, relative risk = 4.7, chi 2 = 15.3, p less than 0.0001). This specific nucleotide sequence is common to Cw6 and Cw7, but some other HLA-C alleles including Cw4 and C blank (Cx52) also proved to have this sequence. It is suggested that alanine at position 73 of HLA-C molecules can be a good marker for psoriasis vulgaris and that this residue may play an important role in determining susceptibility to this disease.     

寻常性银屑病与载脂蛋白Eε2相关性研究

目的探讨我国汉族人寻常性银屑病(PV)与载脂蛋白E(ApoE)等位基因2的相关性。方法采用聚合酶链反应限制性长度多态性(PCR-RPLP)方法,分析汉族人群中100名健康者和101例PV患者ApoE基因型,其中包括I型银屑病患者83例,Il型18例。按严重程度将银屑病分为三度(轻度31例,中度29例,重度41例)进行探讨。结果在PV组ε3/2基因型和ε2等位基因频率显著高于健康对照组,且ε2等位基因与PV密切关联(RR=2.9096,χ2=5.263,P<0.05)。ε3/2基因型和ε2等位基因频率在I型银屑病组和中、重度组中分别高于II型银屑病和轻度组,但无统计学意义。结论ApoE分子在银屑病发病过程中起着重要作用。ε2等位基因可能是PV的一个危险因素,并与PV的发病年龄和严重程度有关。     

SPR1 gene near HLA-C is unlikely to be a psoriasis susceptibility gene

Although genetics analyses have identified the HLA-Cw6 allele to be the major risk allele for psoriasis vulgaris (PV) in many racial groups, it has been proposed that other putative genes near the HLA-C locus are involved in PV susceptibility and that the association of Cw6 is a result of linkage disequilibrium. The SPR1 gene, a predicted gene located 128 kb telomeric to the HLA-C locus, is considered to be one potential candidate gene of PV. Until now, no association study of the SPR1 gene has been conducted on psoriasis patients. We investigated the SPR1 gene for disease association by direct sequencing of the SPR1 gene in 116 Chinese patients with PV and 116 normal subjects. Genotyping for HLA-Cw6 was also carried out using polymerase chain reaction/restriction fragment length polymorphism. Significant increase of the HLA-Cw6 allele was found in psoriasis patients (32.8% vs. 13.8%, P = 0.001). We found that the SPR1 gene is a highly polymorphic gene containing 13 single nucleotide polymorphisms (SNPs), two of which have not been previously reported, and four SNPs cause amino acid change. No significantly different allelic distribution of 13 SPR1 SNPs could be found between the patients with PV and controls after correction for multiple testing. If the frequencies of SPR1 SNPs were compared between the early onset psoriatics and control subjects, early onset patients were more likely to have G allele at position 988 (60% vs. 35.3%, P = 0.001). However, the significance disappeared upon stratification for the Cw6 status. Haplotype-based association analysis showed two susceptibility haplotypes (types 8 and 19) in early onset psoriasis patients. Nonetheless, the significance also disappeared after stratification of the Cw6 status. Our results suggest that HLA-Cw6 remains the major risk allele in Chinese psoriatics, and that the SPR1 gene might not play an important role in the causation of PV.     

Distinct HLA-C/KIR genotype profile associates with guttate psoriasis

Psoriasis is a multifactorial disease with a strong genetic background. It associates strongly to HLA-Cw*0602. HLA-C interacts with killer immunoglobulin-like receptors (KIR) on natural killer (NK) and some natural killer-T (NKT) cells. KIR's function is triggered by specific binding to HLA ligands, which depends on the amino acid 80 of the MHC class I alpha-chain. This permits classifying all HLA-C alleles into two functional groups: asparagine (N80) or lysine (K80) carrying alleles. Psoriasis patients recruited at disease onset were categorized as guttate, vulgaris without arthropathy and vulgaris with arthropathy plus skin lesions. Patients and carefully matched controls were genotyped for position 80 of HLA-C and for KIR. Based on possible HLA/KIR combinations, individuals were classified according to expected NK/NKT cell responses: balanced (B), excess inhibition (EI), excess activation (EA), or undetermined (U). HLA-Cw6 and position 80 genotyping associated strongly to disease, whereas KIR2DS1 associated weakly. Individuals of the U and EI classes were more common among guttate psoriasis patients, which related to HLA-Cw*0602 status. These results suggest that different levels for NK/NKT cell activation thresholds, not only reduction, contribute to immune deregulation in psoriasis. In the guttate phenotype, balanced HLA-C/KIR interactions might be altered by the presence of concomitant streptococcal infections.     

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.     

Alanine at position 73 of HLA-C is associated with psoriasis vulgaris in Finland

A close association was found between a specific sequence of HLA-C and psoriasis vulgaris in Finnish patients (χ²=18.4, P=1.78×10^?5). This sequence codes for alanine at position 73 of the HLA-C molecule in the antigen binding cleft, and alanine may play a role in susceptibility to the disease.