利用新型分类体系评价人类白细胞抗原-DRB1基因与中国北方汉族人群类风湿关节炎的易感性

目的 从等位基因及基因型2个层次探讨人类白细胞抗原(HLA)-DRB1基因与中国北方汉族人群类风湿关节炎(RA)的相关性.方法 选取RA患者281例及健康对照202名,以直接测序法(SBT)对HLA-DRB1的亚型进行检测,并用UTYPE软件进行分析.HLA-DRB1的分类采用经典的共同表位(SE)分类及2005年Tezenas du Montcel等提出的新分类:即根据DRB 1的72～74位氨基酸序列是否具有精氨酸-丙氨酸-丙氨酸(RAA)序列特点,将DR分子分为S及X,再根据70及71位氨基酸的特点进一步将S分成S1～S3.采用直接计数法计算等位基因频率.统计学方法采用x2检验.结果 在281例中国北方RA患者中,共检出41种DRB1亚型,含SE的患者占44.8％.其中70～74位编码QRRAA序列的亚型占33.8％(95/281),显著高于健康人(P＜0.05),是RA的易感亚型.在汉族人中这些亚型包括*0101,*0102,*0404,*0405及*0410.编码DRRAA以及DERAA序列者为RA的保护亚型,分别占22.5％(91/562)和3.7％(15/562),显著低于健康对照(P＜0.05).利用2005年Tezenas du Montcel等提出的新分类体系,对HLA-DRB1基因型进行分析,携带SE及Tezenas du Montcel新分类中S3P的基因型为RA的易感基因型,而新分类中的S3D及S1E为RA的保护基因型.结论 中国汉族人群的HLA-DRB1的易感亚型特点皆为QRRAA序列,保护亚型为DRRAA与DERAA,具体分型及分布与白种人不同,需要建立更完善的中国人群HLA分型数据库.     

Lipid profile in Tunisian patients with rheumatoid arthritis

This study aims to assess the prevalence of dyslipidaemia in Tunisian patients with active RA and to investigate the clinical and biological associated factors. A cross-sectional study was conducted on 92 unselected patients with active RA (77 females and 15 males, aged 49.1 ± 12.5 years) and 82 healthy subjects (68 females and 14 males, aged 50.8 ± 13.3 years). We recorded the patients' characteristics and the results of a lipid profile test (total cholesterol, TC; high-density lipoprotein cholesterol, HDL-c; low-density lipoprotein cholesterol, LDL-c; triglyceride, TG; lipoprotein (a), Lp (a); apolipoprotein A-1, apo A-1 and apolipoprotein B, apo B). In comparison to the control group, RA patients showed a higher prevalence of associated dyslipidaemia (95.7% versus 65.9% of cases, p < 0.001). Sera of patients showed higher TC (4.86 ± 1.07 versus 3.98 ± 0.73 mmol/L, p < 0.001), LDL-c (3.49 ± 0.98 versus 1.99 ± 0.62 mmol/L, p < 0.001), Lp (a) (288.04 ± 254.59 versus 187.94 ± 181.37 mmol/L, p = 0.004) and lower HDL-c (0.66 ± 0.24 versus 1.12 ± 0.3 mmol/L, p < 0.001). TC/HDL-c, LDL-c/HDL-c and non-HDL-c/HDL-c were also higher in RA patients; they were 8.24 ± 3.20 versus 3.76 ± 1.26 (p < 0.001), 5.91 ± 2.48 versus 1.92 ± 0.99 (p < 0.001) and 7.24 ± 3.20 versus 2.76 ± 1.26 (p < 0.001), respectively. Apo A-1 was correlated to Lp (a) (r = 0.291, p = 0.005). Corticoid dose was not associated to dyslipidaemia, but in multiple regression models, corticoid dose may be negatively related to some atherogenic markers, in particular non-HDL-c. Tunisian patients with markedly active RA experience substantially reduced serum HDL-c and increased TC, LDL-c and Lp (a) concentrations as well as increased TC/HDL-c, LDL-c/HDL-c and non-HDL-c/HDL-c ratios.     

新疆地区维吾尔族及汉族溃疡性结肠炎患者人类白细胞抗原-DRB1等位基因与抗中性粒细胞胞质抗体的相关性

目的 研究人类白细胞抗原(HLA)-DRB1基因多态性与新疆地区维吾尔族及汉族溃疡性结肠炎(UC)患者抗中性粒细胞胞质抗体(ANCA)的关联性.方法 用间接免疫荧光法分别对62例维吾尔族UC患者、58例汉族UC患者、188名维吾尔族健康对照者、184名汉族健康对照者进行血清ANCA检测,采用聚合酶链反应直接测序分型法(PCR-SBT)进行HLA DRB1基因分型,分别在维吾尔族和汉族内比较ANCA阳性者、ANCA阴性者及健康对照者的HLA-DRB1等位基因频率,并按UC临床类型、严重程度、受累范围进行分层分析.应用SPSS 17.0统计软件进行x2检验,当P＜0.05时,计算比值比(OR)和95％可信区间(95％ CI).结果 维吾尔族UC患者ANCA阳性率[53.2％ (33/62)]高于汉族UC患者[34.5％ (20/58)],差异有统计学意义(x2=4.269,P＝0.045).在维吾尔族中,ANCA阳性UC患者HLA-DRB1* 13的基因频率(0.202)显著高于ANCA阴性患者(0.017,x2＝10.092,P＝0.016,OR＝16.000,95％CI:2.892～88.524)和健康对照组(0.075,x2=9.351,P＝0.040,OR=3.407,95％CI:1.666～6.971).ANCA阳性的全结肠炎型UC患者HLA-DRB1* 13基因频率(9/15)高于ANCA阴性的全结肠炎型UC患者(1/14),差异有统计学意义(x2=8.955,P=0.040,OR＝19.500,95％CI:2.787～136.461).在汉族中,HLA-DRB1 各等位基因在ANCA阳性者、ANCA阴性者和健康对照者间差异均无统计学意义(P均＞0.05),分层分析所获结果亦然.结论 在新疆地区维吾尔族UC患者中,HLA-DRB1* 13可能与ANCA有关,还可能与全结肠炎型患者的ANCA有关.在新疆地区汉族患者中则可能无此关联性.     

Frequency of human leukocyte antigens class II-DR alleles (HLA-DRB1) in Argentinian patients with early arthritis

Clinical Rheumatology - Patients with rheumatoid arthritis (RA) or undifferentiated arthritis (UA) in the CONAART database (Argentine Consortium for Early Arthritis) were assessed for genetic risk...     

Relationship between human leukocyte antigen-DRB1 and autoimmune hepatitis type I in Chinese patients

AIM: To analyze the association of human leukocyte antigen (HLA)-DRB1 with autoimmune hepatitis type I (AIH) among Chinese patients in the Shanghai area. METHODS: In 32 patients and 48 healthy controls, polymerase chain reaction amplified with sequence-specific primers (PCR-SSP) was performed to elucidate the relevance of certain alleles or polymorphic sequences of HLA-DRB1 with autoimmune hepatitis. RESULTS: The HLA-DRB1 typing by PCR-SSP showed that DR4 had a significantly increased frequency among patients with AIH versus that of healthy controls (46.9 vs 20.8%; relative risk = 3.35, P = 0.014). In the subtypes of DR4, there was a trend of an increase in the gene frequency of DRB1*0405 in patients with AIH versus that of healthy controls (21.9 vs 6.3%, P = 0.04, but corrected P (Pc) = 0.08). In addition, our analysis indicated a significant increase in the alleles frequency encoding Leu-Leu-Glu-Gln-Lys-Arg (LLEQRR) from the third hyperpolymorphic region (HVR3) of DR4 in the patients with AIH (86.7% of DR4 positive patients vs 40.0% in DR4 positive controls, P = 0.016, Pc = 0.028, relative risk (RR) = 9.75). CONCLUSION: Type I AIH among Chinese patients is associated with HLA-DR4. There is a relevance of type I AIH and LLEQRR sequence within the third hyperpolymorphic region of the DRB1 allele.     

HLA-DRB1*04 alleles in Japanese rheumatoid arthritis patients with AA amyloidosis

OBJECTIVE: To compare the HLA-DRB1 shared epitope (SE) alleles in Japanese patients with rheumatoid arthritis (RA) and amyloid A (AA) amyloidosis versus those without AA amyloidosis. METHODS: The HLA-DRB1 alleles were genotyped for 91 RA patients without AA amyloidosis, 33 RA patients with AA amyloidosis, and 63 control subjects. HLA-DRB1 typing was performed by polymerase chain reaction, sequence-specific oligonucleotide probe hybridization method. RESULTS: Although a significant difference was not observed, the frequency of SE genotype was higher in RA patients with AA amyloidosis than in those without AA amyloidosis. All SE-positive RA patients with AA amyloidosis had *04 alleles (*0401, *0405, *0410), and a significant association of the presence of a double dose of *04 SE alleles with AA amyloidosis (OR 4.0, 95% CI 1.91-13.99) was observed. CONCLUSION: Our data suggest that presence of double *04 SE is associated with a higher risk of developing AA amyloidosis in Japanese patients with RA.     

Association of human leukocyte antigen DQB1 and DRB1 alleles with chronic hepatitis B

AIM: To investigate the effect of human leukocyte antigen (HLA) DRB1 and DQB1 alleles on the inactive and advanced stages of chronic hepatitis B.METHODS: Patient records at a single institution’s hepatology clinic were reviewed. Demographic data, laboratory results, endoscopy results, virological parameters, biopsy scores and treatment statuses were recorded. In total, 355 patients were eligible for the study, of whom 226 (63.7%) were male. Overall, 82 (23.1%) were hepatitis B early antigen (HBeAg) positive, 87 (24.5%) had cirrhosis, and 66 (18.6%) had inactive disease. The presence of DQB1 and DRB1 alleles was determined by polymerase chain reaction with sequence-specific primers. The distribution of the genotyped alleles among patients with cirrhosis and patients with chronic active hepatitis was analyzed.RESULTS: The most frequent HLA DQB1 allele was DQB1*03:01 (48.2%), and the most frequent HLA DRB1 allele was DRB1*13/14 (51.8%). DQB1*05:01 was more frequent in patients with active disease than in inactive patients (27% vs 9.1%; P = 0.002, P_c = 0.026). DRB1*07 was rare in patients with cirrhosis compared with non-cirrhotics (3.4% vs 16%; P = 0.002, P_c = 0.022). Older age (P < 0.001) and male gender (P = 0.008) were the other factors that affected the presence of cirrhosis. In a multivariate logistic regression analysis, DRB1*07 remained a significant negative predictor of cirrhosis (P = 0.015). A bioinformatics analysis revealed that a polymorphic amino acid sequence in DRB1*07 may alter interaction with the T-cell recognition site.CONCLUSION: This study demonstrates that HLA alleles may influence cirrhosis development and disease activity in Turkish chronic hepatitis B patients.     

HLA DRB1* alleles in rheumatoid nodulosis: a comparative study with rheumatoid arthritis with and without nodules

Rheumatoid nodulosis (RN) is a rare condition associating rheumatoid nodules, episodes of arthritis, cystic bone lesions and, generally, positive rheumatoid factors (RF). It is considered a benign variant of rheumatoid arthritis (RA). In this study, we determined the HLA DRB1^* alleles of our RN patients and compared the distribution of these alleles to those of 74 healthy controls and 104 RA patients with and without nodules. Four RN patients were observed. All had subcutaneous nodules and RF were negative in three patients. Of the 104 RA patients, 18 had nodules (nodRA). Systemic manifestation (including vasculitis, peripheral neuropathy or lung involvement) were found in seven of these nodRA cases (33.8%) and most had positive RF and erosive changes on X-rays. Only one RN patient had a RA-associated allele (DRB1^*0101). The frequencies of the HLA DRB1^* alleles encompassing the “rheumatoid” shared epitope were similar to those of other RA series: ^*0101, 34.6% (P=0.03 compared with controls); ^*0401, 26.9% (P<0.0001); ^*0404, 12.5% (P=0.04); ^*0405, 4.8% (P=0.8); ^*1001, 8.6% (P=0.5). Of the nodRA and seronegative RA patients, 77.7% and 53.3%, respectively, presented the shared epitope. Thus, there was a tendency to decreased expression of the RA-associated alleles in RN (25%) compared with nodRA and seronegative RA patients. This study is restricted by the small number of tested RN patients, but the results suggest that the RA-associated alleles are poorly expressed in RN. Received: 29 September 1997 / Accepted: 13 February 1998     

Reliability of the rheumatoid arthritis articular damage score in Tunisian patients

The clinical rheumatoid arthritis articular damage (RAAD) score is easy to perform and showed good intraobserver reliability. It correlates well with the Larsen score and disease duration and can be recommended for rheumatoid arthritis patients follow-up in developing countries.     

A longitudinal study of the leukocyte protein L1 as an indicator of disease activity in patients with rheumatoid arthritis

L1 is a major granulocyte and monocyte protein. It is released during leukocyte activation, and the plasma level is thought to reflect the inflammatory activity. Fifteen patients with classical or definite rheumatoid arthritis were examined monthly during one year. The laboratory tests included L1, erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), orosomucoid, haptoglobin, ceruloplasmin, alpha 1-antitrypsin, immunoglobulins and blood cell counts. The clinical tests included articular index, grip strength, morning stiffness and pain. The L1 protein was found to have highly significant correlations (p less than 0.0001) with orosomucoid (r = 0.86), CRP (r = 0.79), ESR (r = 0.78), haptoglobin (r = 0.75), alpha 1-antitrypsin (r = 0.63) and ceruloplasmin (r = 0.44). Significant correlation was also found between L1 and IgA. None of the laboratory variables showed significant correlation with pain, but when they were correlated with articular index, grip strength and morning stiffness, L1 was found to have the highest average correlation coefficient (p less than 0.0001).