Specific HLA-DQB1 alleles associated with risk for development of hepatocellular carcinoma:A meta-analysis

AIM:To evaluate the association of human leukocyte antigen(HLA)-DQB1 alleles with hepatocellular carcinoma(HCC) through meta-analysis of published data.METHODS:Case-control studies on HLA-DQB1 allele association with HCC published up to January 2010 were included in the analyses.The odds ratios(ORs) of HLADQB1 allele distributions in HCC patients were analyzed and compared with healthy controls.The meta-analysis software REVMAN 5.0 was applied for investigating heterogeneity among individual studies and for summarizing all the studies.A meta-analysis was performed using fixed-effect or random-effect methods,depending on the absence or presence of significant heterogeneity.Seven case-control studies containing 398 cases and 594 controls were included in the final analysis.RESULTS:Among the five family alleles,two(DQB1*02 and DQB1*03) were found to be significantly associated with the risk of HCC.The combined OR for the association of DQB1*02 and DQB1*03 allele with the risk for HCC was 1.78(95% CI:1.05-3.03,P = 0.03) and 0.65(95% CI:0.48-0.89,P = 0.007),respectively.Among the 13 specific alleles,two(DQB1*0502 and DQB1*0602) were significantly associated with risk of HCC.The combined OR for the association of DQB1*0502 and DQB1*0602 allele with the risk for HCC was 1.82(95% CI:1.14-2.92,P = 0.01) and 0.58(95% CI:0.36-0.95,P = 0.03),respectively.No significant association was established for other HLA-DQB1 family alleles and specific alleles.CONCLUSION:Our results support the hypothesis that specific HLA-DQB1 allele families and alleles might influence the susceptibility or resistance to HCC,although it needs further investigations.

HLA-DQA1*0501、HLA-DQB1*02基因多态性与抗Ro/SSA抗体阳性pSS易感性的关系分析

目的基于数据库相关数据分析人类白细胞抗原(HLA)-DQA1*0501和HLA-DQB1*02基因多态性与抗Ro/SSA抗体阳性的原发性干燥综合征(pSS)易感性的关系。方法使用计算机检索相关数据库,筛选并收集pSS患者、抗Ro/SSA抗体阳性的pSS患者、抗Ro/SSA抗体阴性的pSS患者以及健康对照人群的HLA-DQA1*0501、HLA-DQB1*02基因多态性资料。使用STATA 16.0(USA)统计软件分析抗Ro/SSA抗体阳性的pSS患者中HLA-DQA1*0501和HLA-DQB1*02基因多态性与pSS发生的关系。结果纳入文献5篇,涉及420例pSS患者、250例抗Ro/SSA抗体阳性pSS患者、120例抗Ro/SSA抗体阴性的pSS患者和733例健康对照者。在pSS患者中,HLA-DQA1*0501和HLA-DQB1*02基因阳性分别为159、246例;在健康对照者中,HLA-DQA1*0501和HLA-DQB1*02基因阳性分别为196、282例;在抗SSA抗体阳性pSS患者中,HLA-DQA1*0501和HLA-DQB1*02基因阳性分别为129、158例;在抗SSA抗体阴性pSS患者中,HLA-DQA1*0501和HLA-DQB1*02基因阳性分别为30、46例。HLA-DQA1*0501和HLA-DQB1*02基因多态性与pSS的易感性有关(I2分别为62.99%、40.75%,合计OR值分别为2.60、2.43,95%CI分别为1.49~4.55、1.88~3.14,P均<0.05)。HLA-DQA1*0501和HLA-DQB1*02基因多态性也与抗Ro/SSA抗体阳性pSS的易感性有关(I2分别为0.00%、9.41%,合计OR值分别为3.85、2.61,95%CI分别为1.81~8.21、1.52~4.48,P均<0.05)。结论HLA-DQA1*0501和HLA-DQB1*02基因多态性与抗Ro/SSA抗体阳性的pSS患者的易感性相关。具有HLA-DQA1*0501和HLA-DQB1*02基因阳性的抗Ro/SSA抗体阳性患者更容易患pSS。

Carrier frequency of HLA-DQB1*02 allele in patients affected with celiac disease:A systematic review assessing the potential rationale of a targeted allelic genotyping as a first-line screening

BACKGROUND Celiac Disease(CD)is an immune-mediated disorder,in which the HLA immunogenetic background(DQ2 and DQ8 heterodimers)and environmental trigger(gluten)are well established.Indeed,both factors are necessary–but not sufficient–to develop CD.However,it is very likely that CD is underdiagnosed in both developing and developed countries,due to several aspects,including the fact that a lot of patients present mild and/or atypical symptoms,without the presence of any recognized risk factors.Therefore,the possibility and feasibility of widened screening strategies to identify CD patients are debated.AIM To provide further evidence of the main epidemiological importance of HLADQB1*02 allele in the population of CD patients.METHODS We performed a systematic search in PubMed,EMBASE,Cochrane,Web of Science and Scopus databases,in order to produce a systematic review assessing the carrier frequency of HLA-DQB1*02 allele in the celiac population.Following the PRISMA guidelines,we retrieved all the original articles describing CD patients’HLA-DQB1 genotype in such a way that could allow to assess the HLADQB1*02 carrier frequency among CD patients,along with the evidence of the appropriate diagnostic work-up to achieve a correct and final diagnosis of CD.RESULTS The final output of this systematic search in the medical literature consisted of 38 studies providing the appropriate HLA-DQB1 genotype information of the respective CD population.According to this systematic review,including a pool of 4945 HLA-DQ genotyped CD patients,the HLA-DQB1*02 carrier frequency was 94.94%,meaning that only 5.06%of CD patients were completely lacking this allelic variant.Interestingly,if we consider only the studies whereby the prevalence of CD patients affected with type 1 diabetes mellitus was supposed or clearly established to be very low,the frequency of non-HLA-DQB1*02 carriers among CD patients dropped to 3.65%.CONCLUSION Such a high carrier frequency of the HLA-DQB1*02 allelic variant(which is>95%-96%in CD patients without risk factors,like type 1 diabetes mellitus comorbidity)might be exploited to consider a cost-effective and widened screening approach.If a sustainable strategy could be implemented through a low-cost targeted genetic test to detect the individual presence of HLA-DQB1*02 allele,an appropriate algorithm for serological screening in individuals resulting to be genetically predisposed to CD,might be considered.

HLA-DQB1~* alleles and genetic susceptibility to type 1 diabetes mellitus

AIM: To determine human leukocyte antigen (HLA)-DQB1 allele association with susceptibility to type 1 diabetes (T1D) and to clinical and laboratory findings. METHODS: This study was conducted on 85 unrelated Egyptian children with T1D recruited consecutively from the Pediatric Diabetes Endocrinology outpatients Clinic; Mansoura University Children’s Hospital, Egypt. Patient mean follow up period was 2.5 years. Patients were subdivided according to level of HbA1c (optimal/suboptimal control < 8.5% and poor control ≥ 8.5%). The control group consisted of 113 unrelated age- and sex-matched healthy subjects without T1D or other autoimmune diseases. Genomic DNA extraction was done for all subjects using a DNA isolation kit. HLA-Class II-DQB1 allele typing was carried out with a polymerase chain reaction-sequence-specific oligonucleotide probe using a INNO-LiPA HLA-DQB1 update kit. RESULTS: Significant differences were detected between Egyptian patients with T1D and control groups in the frequencies of DQB1*02 [44.4% vs 18.6%, corrected P value (Pc) < 0.001] and DQB1*03 (41.2% vs 24.4%, Pc < 0.001). Significant differences were also observed between control groups and T1D patients in the frequencies of DQB1*05 (14.6% vs 7.2%, P = 0.029) and DQB1*06 (34.1% vs 7.2%, P < 0.001). However, after correction for multiple comparisons, the significance was retained for HLA-DQB1*06 (Pc < 0.001) but lost for HLA-DQB1*05. HLA-DQB1*0201, *0202, *030201 were positively associated with T1D (Pc = 0.014, Pc < 0.001, and Pc < 0.001 respectively), while HLA-DQB1*060101 was negatively associated (Pc < 0.001) with the condition. Although the HLA-DQB1 alleles 030101 and 050101 were significantly higher in controls (P = 0.016, P = 0.025 respectively), both of them lost statistical significance after correction of P value. The frequency of the HLA-DQB1 genotypes 02/02, 02/03, and 03/03 was higher in T1D patients, and the frequency of the genotypes 03/06, 05/06, and 06/06 was higher in controls, these differences being statistically significant before correction. After correction, the genotypes 02/02, 02/03 in T1D, and the genotypes 03/06, 06/06 in controls were still significant (Pc = 0.01, Pc < 0.001, Pc < 0.001, and Pc = 0.04, respectively). Non-significant associations were found between the frequency HLA-DQB1 alleles and genotypes in T1D in relation to the grade of diabetic control, Microalbuminuria, age, gender, age of presentation, weight, height, frequency of diabetic ketoacidosis (P = 0.42), serum cholesterol, and fasting and post-prandial level of C-peptide (P = 0.83, P = 0.9, respectively). CONCLUSION: The Current work suggests that HLA-DQB1 alleles *030201, *0202, *0201, and genotypes 02/03, 02/02 may be susceptibility risk factors for development of T1D in Egyptian children, while the HLA-DQB1*060101 allele, and 03/06, 06/06 genotypes may be protective factors. HLA-DQB1 alleles and genotypes do not contribute to microalbuminuria or grade of diabetic control.

HLA-B和-DRB1、HLA-DQB1和-DPB1座位基因重组的分析

目的:探讨2个家系人类白细胞抗原(HLA)座位的重组情况。方法:采集家系成员的外周血,提取基因组DNA,采用聚合酶链反应-序列特异性寡核苷酸探针技术(PCR-SSO)和二代测序技术检测HLA-A、-B、-C、-DRB1、-DQB1和-DPB1座位,通过家系遗传分析确定个体HLA单体型。结果:家系1中单体型HLA-A*11:01~C*03:04~B*13:01~DRB1*12:02~DQB1*03:01~DPB1*05:01:01G与HLA-A*03:01~C*04:01~B*35:03~DRB1*12:01~DQB1*03:01~DPB1*04:01:01G在HLA-B和HLA-DRB1座位间进行了交换,形成HLA-A*11:01~C*03:04~B*13:01~DRB1*12:01~DQB1*03:01~DPB1*04:01:01G。家系2中单体型HLA-A*02:06~C*03:03~B*35:01~DRB1*08:02~DQB1*04:02~DPB1*13:01:01G与HLA-A*11:01~C*07:02~B*38:02~DRB1*15:02~DQB1*05:01~DPB1*05:01:01G在HLA-DQB1和HLA-DPB1座位间进行了交换,形成HLA-A*02:06~C*03:03~B*35:01~DRB1*08:02~DQB1*04:02~DPB1*05:01:01G。结论:2个中国汉族人群家系分别发生了HLA-B和-DRB1、HLA-DQB1和-DPB1座位间的基因重组。

Influence of HLA-DRB1 alleles and HBV genotypes on interferon-α therapy for chronic hepatitis B

AIM. To investigate the influence of HLA-DRB1 alleles and HBV genotypes on inberferon-α therapy for chronic hepatitis B. METHODS： HLA-DRBI＊03, ＊07, ＊09,＊12, ＊15 alleles were determined using polymerase chain reaction/sequence specific primer （PCR/SSP） technique in 126 patients with chronic hepatitis B and 76 normal control subjects in Shandong Province, and HBV genotypes were determined by nested-PCR analysis using type-specific primers in 126 patients. RESULTS： The positivity of HLA-DRB1＊07 allele in chronic hepatitis B group was significantly higher than that in normal control group （X^2 = 6.33, P〈0.025, RR = 2.37）. Among the 126 patients, genotype B was found in 38 （30.2%）, genotype C in 69 （54.8%）, and mixed genotype （B＋C） in 19 （15.0%）, genotypes D-F were not found. Among the 46 DRB1＊07（＋） patients, 7 were responders and 39 were non-responders among them （X^2 = 6.71, P〈0.05）. The positivity of HLADRB1＊07 and prevalence of HBV genotype C were significantly higher in non-responders than in responders. CONCLUSION： High positivities of HLA-DRB1 ＊07 allele and HBV genotype C are closely associated with the lower response to interferon-α therapy for chronic hepatitis B.

Characterization of a Novel Weak Allele of RGA1/D1 and Its Potential Application in Rice Breeding

Semi-dwarfing improves the lodging resistance and yield of rice,and the vast majority of modern rice varieties harbor the sd1 allele to decrease plant height,resulting in reduced genetic diversity and negative agronomic traits.Thus,exploring alternative sources of dwarfism is imperative for rice breeding.Here,we identified a novel RGA1 allele,d1-w,from a local indica variety Xiaolixiang(XLX)using a map-based cloning approach.Compared with other rice varieties,RGA1 in XLX contained a unique single nucleotide polymorphism that resulted in an additional transcript and reduced functional RGA1 transcript level.The RGA1 from Nipponbare was introduced into XLX to estimate the value of d1-w in rice breeding.Compared with transgenic XLX plants(XLX^(D1)),XLX exhibited reduced plant height,increased stem strength,lower reactive oxygen species accumulation,delayed senescence,stronger photosynthesis,higher grain yield and quality(including external,milling and nutritional qualities),and enhanced resistance to drought and Rhizoctonia solani.Therefore,we proposed that the d1-w allele has potential as an excellent dwarfism resource for rice breeding.

Human leukocyte antigen class-Ⅱ DRB1 alleles and Giardia lamblia infection in children: A case-control study

Objective:To compare the genotype frequencies of HLA class-ⅡDRB1 alleles in Giardia(G.)lamblia-infected children.Methods:A total of 490 Egyptian children aged 2-16 years were subjected to microscopic stool examination to detect G.lamblia infection,and to exclude other intestinal pathogens.On the basis of their microscopic findings,a group of 80 children were chosen as giardiasis cases,another 80 children were confirmed as Giardia free control group by immunochromatographic test,and the remaining children were excluded.Both giardiasis and control groups were then subjected to blood examination to identify their genetic type of HLA-DRB1 alleles.Results:HLA class-ⅡDRB1*03:01 and DRB1*13:01 alleles were significantly associated with G.lamblia infection(P<0.001 for each variable).On the other hand,HLA class-ⅡDRB1*04:02,DRB1*10:01,DRB1*14:01 and DRB1*15:01 alleles were significantly demonstrated in Giardia free children.However,other HLA-DRB1 alleles did not show any significant association with giardiasis.Conclusions:HLA class-ⅡDRB1*03,DRB1*13,DRB1*04,DRB1*10,DRB1*14 and DRB1*15 alleles may be involved in the establishment of host immune response to G.lamblia infection.

Helicobacter pylori vacA s1a and s1b alleles from clinical isolates from different regions of Chile show a distinct geographic distribution

AIM： To establish the most common vacA alleles in Helicobacter pylori （ H pylon） strains isolated from Chilean patients and its relationship with gastritis and gastroduodenal ulcers, METHODS： Two hundred and forty five Hpyloriclinical isolates were obtained from 79 biopsies from Chilean infected patients suffedng from gastrointestinal diseases. An average of 2-3 strains per patient was isolated and the vac4 genotype was analyzed by PCR and 3% agarose electrophoresis. Some genotypes were checked by DNA sequencing. RESULTS： The most prevalent vacA genotype in Chilean patients was slb ml （76%）, followed by sla ml （21%）. In oontrast, the s2 m2 genotype was scarcely represented （3%）. The slb ml genotype was found most frequently linked to gastropathies （P〈0.05） rather than ulcers. Ulcers were found more commonly in male and older patients. Curiously, patents IMng in dties located North and far South of Santiago, thecapital and largest Chilean city, carried almost exclusively strains with the slb ml genotype. In contrast, patients from Santiago and cities located South of Santiago carded strains with either one or both sla ml and slb ml genotypes. Regarding the s2 m2 genotype, comparison with GenBank sequences revealed that Chilean s2 sequence was identical to those of Australian, American, and Colombian strains but quite different from those of Alaska and India. CONCLUSION： Differences in geographic distribution of the s and m vacA alleles in Chile and a relationship of slb ml genotype with gastritis were found. Sequence data in part support a hispanic origin for the vacA genotype. Asymmetric distribution of genotypes slb ml and s2 m2 recedes H Pyloristrain distribution in Spain and Portugal.

Low Frequencies of CCR5-Δ32 and CCR5-m303,but High Frequencies of CCR2-641 and SDF1-3'A Alleles in Indigenous Ethnic Groups in China's Mainland

Objective: The aim in this study was to identify the allelicfrequencies of the chemokine (SDF1-3'A) and chemokinereceptor (CCR5△32, CCR5m303 and CCR2-64I) genesresistant to HIV-1 infection and/or disease progression inindigenous Chinese populations. Methods: By using QIAamp DNA Blood Mini Kit, thegenomic DNA samples were purified from whole peripheralblood of healthy individuals (n=2067) from Han, Uygur,Mongolian and Tibetan ethnic groups, as well as Han patientsincluding HIV-1 carriers (n=330), patients with other sexuallytransmitted diseases (STDs, n=259) and intravenous drugusers (IVDUs, n=125). The allelic polymorphisms wereidentified by means of PCR or PCR-RFLP analyses. Thesequences of randomly selected amplified PCR products werefurther confirmed by direct DNA sequencing. Results: The mutant frequencies were identified to be0%～3.48% for CCR5△32, 0% for CCR5m303,19.15%～28.79% for CCR2-64 and 19.10%～28.73% for SDF1-3'A alleles, respectively, in Chinese healthy individuals fromfour ethnic groups. Our findings indicated the allelicfrequencies vary among the different ethnic groups.Furthermore, the HIV-1 carriers, STD cases and IVDUs (all ofHan ethnicity) were found to have the allelic frequencies of0%～0.19% (CCR5△32), 0% (CCR5m303), 19.31%～20.45%(CCR2-64) and 25.61%～26.83% (SDF1-3'A) with minorvariations in their frequencies between the patients andhealthy Han groups. There was no CCR5-m303 mutationfound in any subject in this study. Conclusion: The examined subjects of four Chinese ethnicorigins showed lower frequencies of CCR5△32 andCCR5m303 alleles, but higher frequencies of mutant CCR2-64I and SDF1-3'A alleles compared to those identified innorthern-European and American Caucasians. Thesignificance of the different frequencies and polymorphisms ofthe above alleles in Chinese populations needs to be furtherexamined in HIV-1/AIDS diseases.

Proxitome profiling reveals a conserved SGT1- NSL1 signaling module that activates NLRmediated immunity

Suppressor of G2 allele of skp1(SGT1)is a highly conserved eukaryotic protein that plays a vital role in growth,development,and immunity in both animals and plants.Although some SGT1 interactors have been identified,the molecular regulatory network of SGT1 remains unclear.SGT1 serves as a co-chaperone to stabilize protein complexes such as the nucleotide-binding leucine-rich repeat(NLR)class of immune receptors,thereby positively regulating plant immunity.SGT1 has also been found to be asso-ciated with the SKP1-Cullin-F-box(SCF)E3 ubiquitin ligase complex.However,whether SGT1 targets im-mune repressors to coordinate plant immune activation remains elusive.In this study,we constructed a toolbox for TurbolD-and split-TurbolD-based proximity labeling(PL)assays in Nicotiana benthamiana and used the PL toolbox to explore the SGT1 interactome during pre-and post-immune activation.The comprehensive SGT1 interactome network we identified highlights a dynamic shift from proteins associ-ated with plant development to those linked with plant immune responses.We found that SGT1 interacts with Necrotic Spotted Lesion1(NSL1),which negatively regulates salicylic acid-mediated defenseby inter-fering with the nucleocytoplasmic trafficking of non-expressor of pathogenesis-related genes 1(NPR1)during N NLR-mediated response to tobacco mosaic virus.SGT1 promotes the SCF-dependent degrada-tion of NSL1 to facilitate immune activation,while salicylate-induced protein kinase-mediated phosphory-lation of SGT1further potentiates this process.Besides NNLR,NSL1also functions in several other NLR-mediated immunity.Collectively,our study unveils the regulatory landscape of SGT1 and reveals a novel SGT1-NSL1 signaling module that orchestrates plant innate immunity.

C3 PHENOTYPE AND ALLELES，C3 HAV4－1 MONOCLONAL PHENOTYPE DISTRIBUTION IN HYPERTENSIVE PATIENTS WITH IgA GLOMERULONEPHRITIS

Using isoelective focusing in immobilized pH gradients and immunoblot, C3 phenotypes (F, FS, S) and C3 HAV4-1 monoclonal (F±S±) phenotypes were performed in 90 patients with IgA glomerulonephrits,(G.N.).including 49 IgA G. N.hypertensive (H.T.) patients and 41 IgA G. N. normotensive (N.T.) patients, and in 224 normal subjects (N.S.). A significant difference of C3 phenotype distribution between both IgA G. N.(hypertensive and normotensive) and N. S. was .found (P<0.01,P<0.01respectively).In monoclonal C3 HAV4-1(±) distribution significant difference between IgA H. T.and N.S.was observed (P<0.01). Furthermore, F and S allele .frequency of IgA G. N. including HT and NT is significantly. different (P<0.05). This data suggests that hypertensive patients with IgA G. N. seems to be related io the abnormal C3 genetic factors and if this gene distributions can be used as a predictor for the prognosis still needs futher investigations.

儿童期1型糖尿病与HLA-DQB1等位基因的关联研究

目的 研究哈尔滨市儿童期 1型糖尿病与 HL A- DQB1等位基因的关联关系。方法 选取 49例 0～ 14岁发病的 1型糖尿病患者和 75名健康儿童对照 ,运用 PCR- SSOP技术对部分 HL A- DQB1等位基因进行了分型。结果 发现在 HL A- DQB1位点上 ,病例组的 DQB1* 0 2 0 1、* 0 30 3、* 0 40 1频率显著高于对照组 ,而 DQB1* 0 30 1、DQB1* 0 5 0 1和* 0 6 0 1频率是显著下降的。结论 研究提示 :HL A- DQB1位点的 * 0 2 0 1、* 0 30 3和 * 0 40 1对儿童期 1型糖尿病具有强易感性 ,而 DQB1* 0 30 1、* 0 5 0 1和 * 0 6 0 1具有保护性。但未证实 DQB1* 0 6 0

HLA-DQB1基因多态性与广西壮族女性HPV16感染和宫颈癌易感性的关联研究

目的:探讨HLA-DQB1等位基因多态性对广西壮族女性HPV16感染和宫颈癌发生的影响,为寻找广西壮族女性宫颈癌的遗传易感基因或保护基因提供线索。方法:选取广西地区25~45岁宫颈癌确诊的壮族患者、无癌健康壮族女性各171例作为研究对象(按年龄±3岁配对),采集研究对象样本并提取HPV核酸和人基因组DNA,分别应用PCR-SSP和分子导流杂交技术进行HLA-DQB1基因型检测和HPV基因分型检测,最后进行统计学分析。结果:(1)171例宫颈癌患者中HPV总感染率为91.22%,其中高危型病毒占90.76%,HPV16型为主要致病亚型(43.58%);(2)广西壮族女性宫颈癌患者组的HLA-DQB1*04等位基因携带率高于无癌对照组,差异具有统计学意义(P<0.05);等位基因HLA-DQB1*06/09在宫颈癌患者组中的携带率明显低于无癌组,差异具有统计学意义(P<0.05);而两组间的HLA-DQB1*02/05/07/08等位基因携带率无显著性差异(P>0.05);(3)HLA-DQB1*04基因在HPV16阳性宫颈癌患者中出现的频率明显高于HPV16阴性患者,差异具有统计学意义(P<0.05)。结论:HLA-DQB1*04可能是广西壮族女性宫颈癌发生的易感基因,HLA-DQB1*06/09可能是广西壮族女性宫颈癌的保护基因。而HLA-DQB1*02/05/07/08等位基因可能与广西壮族女性宫颈癌遗传易感性无关。携带HLA-DQB1*04等位基因的广西壮族妇女可能更容易感染HPV16型病毒,从而增加了其患宫颈癌的危险性。

中国南方汉族人群HLA-DQB1基因对系统红斑狼疮的易感性研究

应用ＰＣＲ－ＲＦＬＰ核苷酸分型方法，探讨了我国南方江浙沪汉族人群ＨＬＡ－ＤＱＢ１基因多态性与系统红斑狼疮（ＳＬＥ）的遗传关联性。对４８例ＳＬＥ患者的血样分析表明，ＳＬＥ患者具有显著高的ＤＱＢ１＊０６０１等位基因频率（３０．２１％，ＲＲ＝２．８９１９，Ｐｃｏｒｒ＝０．０１１２，ＥＦ＝０．２０），ＤＱＢ１＊０６０１可能是一易感基因；而ＤＱＢ１＊０３０１（２．０８％，ＲＲ＝０．１１０８，Ｐｃｏｒｒ＝０，ＰＦ＝０．１４）呈相反结果，可能为保护基因。

湖北食管癌HLA-DQB1的基因多态性

目的从基因水平探讨湖北地区汉族人食管癌 HEN-DQB1等位基因的遗传易感性.方法运用序列特异性引物聚合酶链反应技术,检测无亲缘关系湖北汉族健康人136例、食管癌组42例患者的 HLA-DQB1等位基因.SAS system 统计软件数据处理.结果湖北汉族人食管癌患者与正常人比较,HEN-DQB1*0301基因频率显著增高(0.2976 vs 0.1875),P=0.046,OR=1.835,病因分数=0.1354);两组间 HLA-DQB1其余各等位基因分布频率的比较,HLA-DQB1*0201(0.0833 vs 0.1016),*0301(0.2976 vs 0.1875),*0302(0.0595 vs 0859),*0303(0.2381 vs 0.1875),*0304(0.0000 vs 0.0039),*0401(0.0714 vs 0.0469),*0402(0.0119 vs 0.0156),*0501(0.0357 vs 0.0703),*0502(0.0595 vs 0.0664),*0503(0.0119 vs 0.0195),*0504(0.0000 vs 0.0039),*0601(0.0595 vs 0.0781),*0602(0.0476 vs 0.0742),*0603(0.0000 vs 0.0078),*0604(0.0238 vs 0.0508),差异均无显著性.结论 HLA-DQB1*0301等位基因与湖北汉族人食管癌正关联,为其易感基因.

HLA-DQB1-HLA-DRB1单倍型与中国南方汉族肺结核的相关性分析

目的 探讨HLA DQB1 HLA DRB1单倍型在中国南方汉族肺结核发病机制中的可能作用。方法 采用病例 对照的研究方法 ,应用PCR SSP技术对 110例中国南方汉族肺结核患者和 10 1例中国南方汉族健康对照者的 2 0个HLA DRB1和 8个HLA DQB1等位基因进行分型 ,比较两组间DQ2 ,3(8) DRB1、DQ3(7) DRB1、DQ3(8,9) DRB1、DQ2 ,3(7,9) DRB1、DQ2 DRB1、DQ4 DRB1、DQ5 DRB1和DQ6 DRB1单倍型频率 (HF)并计算其相对危险性 (RR)。结果 DQ2 ,3(8) DR14 .1、DQ3(7) DR16单倍型的频率肺结核病例组显著高于对照组 (6 .10vs .0 .5 0、4 .18vs .0 .99) ,其RR分别为 13.4 0和 4 .4 1;DQ2 DR1、DQ2 DR12、DQ2 DR13.3、DQ3(7) DR1、DQ3(7) DR13.3、DQ3(8,9) DR13.3、DQ2 ,3(7,9) DR1、DQ2 ,3(7,9) DR13.3、DQ2 ,3(7,9) DR13.4、DQ4 DR4单倍型的频率肺结核病例组显著低于对照组 (分别为 1.84vs .5 .6 0、1.37vs .5 .6 0、4 .18vs .11.0 0、2 .30vs .9.89、12 .6 2vs .2 2 .2 8、5 .6 1vs .11.5 6、3.70vs .14 .4 0、16 .88vs .2 8.94、5 .13vs .12 .12、2 .30vs .6 .13) ,其RR分别为 0 .31、0 .2 3、0 .34、0 .2 1、0 .4 7、0 .4 4、0 .4 6、0 .38和 0 .35。结论 DQ2 ,3(8) DR14 .1、DQ2 DR12、DQ2 ,3(7。

HLA-DQB1等位基因多态性及Th1/Th2细胞相关因子与广西瑶族肝癌家族聚集性的相关性

目的:探讨HLA-DQB1等位基因多态性及相应位点下Th1/Th2细胞相关因子IL-2、IL-4及IL-10对广西瑶族原发性肝癌家族聚集性的影响,为寻找广西瑶族原发性肝癌的遗传易感基因或拮抗基因提供线索。方法:在广西肝癌高发区选取民族为瑶族的肝癌高发家族成员、无癌家族成员各40例作为研究对象(采用相同性别、年龄±5岁配对方法),采集研究对象外周血并提取全血DNA,应用PCR-SSP的方法对HLA-DQB1等位基因进行检测,应用ELISA法检测IL-2、IL-4、IL-10的水平。结果:(1)广西瑶族肝癌高发家族组的HLA-DQB1*02/09等位基因表达频率高于无癌家族组,两组比较差异明显,具有统计学意义(P<0.05);而两组间的HLA-DQB1*04/05/06/07/08等位基因表达频率无显著性差异(P>0.05)。(2)HLADQB1各等位基因在乙型肝炎病毒感染组(HBs Ag阳性组)及非乙型肝炎病毒感染组(HBs Ag阴性组)间的分布频率比较无显著性差异(P值均>0.05)。(3)广西瑶族肝癌高发家族成员组中Th2细胞相关因子IL-4、IL-10平均表达水平高于无癌家族成员组,差异具有统计学意义(P<0.05),而两组间的IL-2浓度无显著性差异(P>0.05)。(4)两组中HLA-DQB1*02阳性成员的IL-10平均表达水平高于HLA-DQB1*02阴性成员,差异具有统计学意义(P<0.05)。(5)两组中HLA-DQB1*09阳性成员的IL-4平均表达水平高于HLA-DQB1*09阴性成员,差异具有统计学意义(P<0.05)。结论:(1)HLA-DQB1*02/09等位基因可能是广西瑶族居民原发性肝癌发生的易感基因。(2)HLA-DQB1各等位基因与广西瑶族居民的HBV感染可能无显著相关性。(3)IL-4、IL-10表达水平失衡可能是广西瑶族肝癌家族聚集性的危险因素。(4)IL-10表达水平失衡可能与HLADQB1*02等位基因的携带有关,而IL-4表达水平失衡可能与HLA-DQB1*09等位基因的携带有关,它们之间共同作用可能与广西瑶族肝癌家族聚集性的发生有相关性。

病理性近视与HLA-DQB1基因关联的家系研究

目的 进行病理性近视家系与 HL A- DQB1基因的相关性研究 ,以探讨其病变机制。方法 抽提 PM家系中 5 8人的基因组 DNA,用 PCR- RFL P方法扩增 HL AII类基因DQB1的第 2个外显子 ,扩增产物用 Hae III,Bss HII,Apa I,Bsa HI,Hae II,Hpa II,Ras I,Bsp12 86 1特异性限制性内切酶酶切分型。检测结果用家系相关分析、传递连锁不平衡方法进行统计分析。结果 HL A- DQB1基因中 * 0 30 1等位基因与 PM有明显的相关性 (P<0 .0 5 )。结论 HL A- DQB1的 * 0 30 1等位基因可能为病理性近视的易感基因 ,与群体研究结果一致 ,提示自身免疫在