白细胞介素-10基因多态性与乙型肝炎病毒感染的关系

目的:探讨中国人白细胞介素-10基因启动子单核苷酸多态性与乙型肝炎病毒感染之后临床发展之间的关系.方法:分别采用聚合酶链反应-限制性片段长度多态性分析法(PCR-RFLP)和聚合酶链反应-序列特异性引物扩增法(PCR-SSP)检测478例慢性乙型肝炎患者,223例乙肝病毒携带者及267例自限性感染者基因组DNAIL-10基因启动子区域3个多态位点-592、-819、-1082的基因多态性,并进行相关性分析.结果:IL-10-1082A等位基因及AA基因型在慢性乙型肝炎患者组的频率明显高于自限性感染者组和乙肝病毒携带者组(A:χ2=37.72,P=0.000;χ2=45.23,P=0.000;AA:χ2=20.53,P=0.000;χ2=19.14,P=0.000).IL-10-819T等位基因及TT基因型在慢性乙型肝炎患者组的频率也高于自限性感染者组和乙肝病毒携带者组(T:χ2=10.5,P<0.001;χ2=17.38,P<0.001;TT:χ2=8.76,P=0.003;χ2=5.656,P=0.017).IL-10-592C/A等位基因频率和AA/CC/AC基因型在三组的分布没有统计学意义(P>0.05).结论:IL-10基因启动子多态性与乙肝病毒感染后临床发展过程可能相关.     

Tim-3基因多态性与乙型肝炎病毒感染转归的相关性

目的:研究中国汉族人群T淋巴细胞免疫球蛋白黏蛋白-3(Tim-3)基因标签单核苷酸多态性(tagSNP)rs11741184C/G和rs13170556A/G位点多态性与乙型肝炎病毒(HBV)感染转归的关系.方法:采用SNaPshot技术检测996例慢性乙型肝炎患者及301例急性HBV感染自限性恢复患者Tim-3基因rs11741184和rs13170556tagSNP位点的多态性,计算其基因型和等位基因分布频率及单体型分布频率.结果:Tim-3基因tagSNPrs11741184位点基因型CC、CG、GG在急性乙型肝炎患者中的分布频率分别为84.39%(254/301)、15.28%(46/301)、0.33%(1/301),在慢性乙型肝炎组中分布频率分别为86.04%(857/996)、13.65%(136/996)、0.3%(3/996),两组比较无统计学差异;Tim-3基因tagSNP rs13170556基因型AA、GA、GG在急性乙型肝炎患者中的分布频率分别为68.77%(207/301)、28.57%(86/301)、2.66%(8/301),慢性乙型肝炎组患者中的分布频率分别为68.07%(6...     

肿瘤坏死因子α基因多态性与慢性乙型肝炎病毒感染的相关性

乙型肝炎病毒（HBV）感染后临床表现的多样性，除与病毒因素有关，还与宿主的遗传因素密切相关。细胞因子在宿主清除病毒的免疫应答中发挥着重要作用，其基因多态性可影响细胞因子的整个转录，翻译和分泌过程，导致不同人群中细胞因子水平的差异，从而影响HBV感染后的转归。肿瘤坏死因子（TNF）α基因启动子区存在有多个多态性位点，分别为-1031（T／C）、-863（C／A）、-857（C／T）、-376（G／A）、-308（G／A）、-238（G／A）和-163（G／A）。     

粘病毒抵抗基因-1启动子88位点G/T多态性影响乙型肝炎病毒感染的自然转归

目的探讨乙型肝炎病毒（HBV）自限感染和慢性感染与粘病毒抵抗基因-1（MxA）启动子的-88位点G／T单核苷酸多态性的关系。方法收集100例抗-HBs和抗-HBc阳性的HBV自限感染者和340例慢性感染者的外周全血，提出基因组DNA；采用竞争分化聚合酶链反应技术为基础的方法进行MxA-88G／T基因分型；采用单因素Odds ratio和x^2检验等方法进行统计学分析。结果MxA-88G／G基因型（低表达型）检出率为50．2％（221／440），T／T基因型（高表达型）检出率为5．5％（24／440），G／T杂合型检出率为44．3％（195／440）。与慢性感染患者相比，自限感染患者携带较低的G／G基因型（41．0％与52．9%，P〈0．05）、G等位基因（62．5％与75．3％，P〈0．01）和较高的T／T基因型（16．0％与2．4%，P〈0．01）、T等位基因（37．5％与24．7％，P〈0．01），而两者之间的G／T杂合型差异无统计学意义。结论MxA-88G／T基因型能在一定程度上影响HBV感染的自然转归，有望成为临床上HBV感染转归的预测指标。     

IL-10基因启动子区单核苷酸多态性与乙型肝炎病毒感染后疾病转归的关系

目的:探讨IL-10基因-1082、-819位点的单核苷酸多态性与HBV感染后疾病转归的关系.方法:采用TaqMan sNP基因分型和基因测序的方法检测187例健康人群、94例感染HBV后自愈者、130例慢性乙型肝炎患者、119例乙型肝炎肝硬化患者以及170例HBV相关性肝癌患者IL-10-1082、-819位点的基因型及等位基因的分布及其差异.结果:全部700例研究对象-1082位点的基因型分布为AA基因型占82.29%、AG占16.00%、GG占1.71%;等位基因频率:A为90.29%,G为9.71%.-819位点的基因型分布为TT占41.43%、TC占48.14%、CC占10.43%;等位基因频率:T为65.64%,C为34.36%.两位点等位基因和基因型分布在各组无统计学差异.以自愈组为对照,-1082 AG基因型和G等位基因对慢乙型肝炎和肝硬化组的风险度降低,-819TC对肝癌组风险度降低,CC基因型和C等位基因对三个肝病组的风险度均有降低的趋势.分析-1082/-819单倍型在各组中的分布,以健康组和自愈组为对照,AC单倍型对肝硬化和肝癌组的风险度均降低,且与自愈组对照时降低程度更大;以自愈组为对照,GC单倍型对慢乙型肝炎和肝硬化组的风险度降低.在不同临床特征的组别之间比较发现,对于-819位点,DNA<10<'3>拷贝/mL的患者C等位基因频率显著高于DNA≥10<'3>拷贝/mL患者(P=0.025).而在肝癌和肝硬化组的211例不同Child-Pugh肝功能分级、277例不同AFP水平以及所有患者组的389例不同HBsAg表达之间的比较无统计学差异.结论:IL-10-1082 AG基因型和G等位基因,-819 TC、CC基因型和C等位基因,-1082/-819AC、GC单倍型对HBV感染后疾病进展可能有一定的保护作用,-819位点C等位基因更有利于HBV感染患者病毒的清除.     

慢性乙型肝炎病毒感染自然史与不良临床结局

乙型肝炎病毒（hepatitis B virus，HBV）感染后的自然病程十分复杂，受到宿主、病毒、环境等诸多因素的影响，了 解HBV的生活周期对于慢性乙型肝炎（chronic hepatitis B，CHB）患者的临床分期以及相关预后非常重要，对于疾病 的临床治疗也会有很大帮助。文章结合最新的主流观点，探讨HBV感染的自然史以及相关的不良临床结局。     

LMP2与LMP7基因多态性与强直性脊柱炎并发虹睫炎易感性关系的研究

目的研究ＬＭＰ基因多态性与强直性脊柱炎并发虹睫炎发病的关系。方法应用ＰＣＲ对正常人和病人进行ＨＬＡＢ２７检测以及ＬＭＰ２和ＬＭＰ７扩增。ＣｆｏＩ进行限制性酶切图谱分析。结果强直性脊柱炎有虹睫炎（ＡＳ＋ＡＡＵ）病史以及单纯虹睫炎（ＡＡＵ）患者ＬＭＰ２基因ＢＢ纯合型较正常人以及强直性脊柱炎（ＡＳ）患者明显增高（Ｐ＜００５）,ＡＳ＋ＡＡＵ患者ＢＢ型ＯＲ＝３６,ＡＡＵ患者ＢＢ型ＯＲ＝５８３。ＬＭＰ７基因多态性无明显差别。结论在我国汉人中,ＬＭＰ２基因多态性与ＡＳ＋ＡＡＵ以及ＡＡＵ发病存在明显相关关系。     

LMP2与LMP7基因多态性及强直性脊柱炎并发虹睫炎易感性关？…

目的 研究ＬＭＰ基因多态性与强直性脊柱炎并发虹睫炎发病的关系。方法 应用ＰＣＲ对正常人和病人进行ＨＬＡ－Ｂ２７检测以及ＬＭＰ２和ＬＭＰ７扩增。ＣｆｏＩ进行限制性酶切图谱分析。结果 强直性脊柱炎有虹睫炎（ＡＳ＋ＡＡＵ）病史以及单纯虹睫炎（ＡＡＵ）患者ＬＭＰ２基因ＢＢ纯合型较正常人以及强直性脊柱炎（ＡＳ）患者明显增高（Ｐ〈０．０５）。ＡＳ＋ＡＡＵ患者ＬＭＰ２基因ＢＢ纯合型较正常人以及强直性脊柱炎（ＡＳ     

肿瘤坏死因子α基因启动子区多态性与乙型肝炎病毒感染相关性的荟萃分析

目的:探讨肿瘤坏死因子α(TNF-α)基因启动子区多态性与乙型肝炎病毒(HBV)持续感染或清除的关系.方法:通过检索PubMed、Embase以及CNKI共纳入18项病例对照研究,采用荟萃分析方法研究TNF-α基因启动子区基因多态性与HBV持续感染或清除的关系,以及采用荟萃回归分析不同研究之间存在异质性的原因.结果:亚洲人群(蒙古人种)中自然痊愈组(904例)-308G/A位点的基因型(GA AA)频率显著高于持续HBV感染组(2303例)(P=0.001),而欧洲人(高加索人种)中持续HBV感染组(256例)-238G/A位点的基因型(GA AA)频率略高于自然痊愈组(195例)(P=0.07),样本量、种族、地区以及研究方法均为影响不同研究之间异质性的因素(P<0.05),使研究之间总变异效应降低了约0.236.结论:TNF-α-308G/A位点多态性可能与感染HBV后的清除有关,而-238G/A位点多态性可能与HBV的持续感染有关,并且样本量、种族、地区以及研究方法因素均可能影响病例对照研究的结果.     

肿瘤坏死因子α基因启动子区多态性与乙型肝炎病毒感染相关性的荟萃分析

目的探讨肿瘤坏死因子α(TNF-α)基因启动子区多态性与乙型肝炎病毒(HBV)持续感染或清除的关系.方法通过检索PubMed、Embase以及CNKI共纳入18项病例对照研究,采用荟萃分析方法研究TNF-α基因启动子区基因多态性与HBV持续感染或清除的关系,以及采用荟萃回归分析不同研究之间存在异质性的原因.结果亚洲人群(蒙古人种)中自然痊愈组(904例)-308G/A位点的基因型(GA AA)频率显著高于持续HBV感染组(2303例)(P=0.001),而欧洲人(高加索人种)中持续HBV感染组(256例)-238G/A位点的基因型(GA AA)频率略高于自然痊愈组(195例)(P=0.07),样本量、种族、地区以及研究方法均为影响不同研究之间异质性的因素(P＜0.05),使研究之间总变异效应降低了约0.236.结论TNF-α-308G/A位点多态性可能与感染HBV后的清除有关,而-238G/A位点多态性可能与HBV的持续感染有关,并且样本量、种族、地区以及研究方法因素均可能影响病例对照研究的结果.     

Association between TLR7 copy number variations and hepatitis B virus infection outcome in Chinese

AIM To explore whether copy number variations (CNVs) of toll-like receptor 7 (TLR7) are associated with susceptibility to chronic hepatitis B virus (HBV) infection.METHODS This study included 623 patients(495 males and 128 females) with chronic hepatitis B virus infection(CHB) and 300 patients (135 females and 165 males) with acute hepatitis B virus infection (AHB) as controls. All CHB patients were further categorized according to disease progression after HBV infection (CHB, liver cirrhosis, or hepatocellular carcinoma). Copy numbers of the TLR7 gene were measured using the Accu Copy method. χ2 tests were used to evaluate the association between TLR7 CNVs and infection type. P values, odds ratios, and 95% confidence intervals(CIs) were used to estimate the effects of risk. RESULTS A m o n g m a l e p a t i e n t s, t h e r e w e r e s i g n i f i c a n t differences between the AHB group and CHB group in the distribution of TLR7 CNVs. Low copy numberof TLR7 was significantly associated with chronic HBV infection (OR = 0.329, 95%CI: 0.229-0.473, P 0.001). Difference in TLR7 copy number was also found between AHB and CHB female patients, with low copy number again associated with an increased risk of chronic HBV infection (OR = 0.292, 95%CI: 0.173-0.492, P 0.001). However, there were no significant differences in TLR7 copy number among the three types of chronic HBV infection (CHB, liver cirrhosis, or hepatocellular carcinoma). In addition, there was no association between TLR7 copy number and titer of the HBV e antigen.CONCLUSION Low TLR7 copy number is a risk factor for chronic HBV infection but is not associated with later stages of disease progression.     

LMP2/LMP7基因编码区多态性及单倍体型与胃癌易感无相关性

目的:探讨中国汉族人群中肿瘤抗原递呈的限速基因LMP2/LMP7单核苷酸多态性与胃癌的遗传易感性关联.方法:提取145例胃癌患者及152例健康献血员外周血基因组DNA,用PCR-RFLP方法检测两组人群中LMP2-codon60/LMP7-codon145两个多态性位点的基因型;并采用PHASE1.0软件构建这两个多态性位点的个体单倍体型,以非条件Logistic回归校正混杂因素,并进行多态性与胃癌患者风险关联的统计学分析.结果:PCR-RFLP检测结果显示:LMP2-codon60与LMP7-codon145处的多态性在中国人群中普遍存在,LMP2/LMP7多态性位点的各自的等位基因频率分布符合Hardy-Weinberg平衡定律;最后的统计分析表明:在145例胃癌患者与152例健康对照人群中LMP2/LMP7两个多态性位点的基因型频率、以及所构建的4个单倍体型频率均没有统计学差异(P值均大于0.05).结论:在中国汉族人群中,LMP2/LMP7基因编码区两个位点的多态性以及单倍体型与胃癌易感无相关性.     

Relationship between cytokine gene polymorphisms and chronic hepatitis B virus infection

Hepatitis B virus (HBV) infection is still a public health problem worldwide, being endemic in some parts of the world. It can lead to serious liver diseases such as chronic hepatitis, cirrhosis, and hepatocellular cancer. The differences in host immune response can be one of the reasons for the various clinical presentations of HBV infection. Polymorphisms of genes encoding the proinflammatory and antiinflammatory cytokines, which are responsible for regulation of the immune response, can affect the clinical presentation of the infection. Particularly, the polymorphisms of the genes encoding cytokines such as interleukin (IL)-1, IL-6, IL-8, IL-10, IL-18, IL-28B, interferon-γ, tumor necrosis factor-α, tumor growth factor-β1, and regulatory molecules like vitamin D receptor and chemokine receptor 5 can be responsible for different clinical presentations of HBV infections. The genomic information about cytokines and other mediators can be important for determining high-risk people for developing chronic hepatitis or hepatocellular cancer and may be used to plan treatment and preventive approaches for these people. In this review, the current knowledge in the literature on the association between cytokine/regulatory molecule gene polymorphisms and clinical course of chronic HBV infection is summarized, and the clinical implementations and future prospects regarding this knowledge are discussed.     

Association between chronic hepatitis B virus infection and interleukin-10, tumor necrosis factor-alpha gene promoter polymorphisms

BACKGROUND: The reasons for the viral persistence of hepatitis B virus infection (HBV) are unknown, but are probably related to host immune factors. Cytokines play a significant role in immune defense. The present study was undertaken to investigate the association between HBV infection and polymorphisms of tumor necrosis factor (TNF)-alpha and interleukin(IL)-10 gene promoter. METHODS: A total of 412 Korean patients with HBV infection (72 inactive carriers, 261 with chronic hepatitis, 79 with liver cirrhosis) and 204 healthy individuals who recovered from HBV infection, were studied. The polymorphisms in IL-10 gene promoter (-1082, -819, -592), and TNF-alpha gene promoter (-308, -238) were assessed by single base primer extension assay. RESULTS: The frequency of C/C genotype at position -592 of IL-10 gene promoter was higher in the HBV clearance group than that in the persistence group in univariate analysis (12.7% vs 7.5%, P = 0.036). The IL-10 gene promoter -592 C/C genotype was related to clearance of HBV infection in logistic regression analysis after adjusting for age and sex (P = 0.003). Genotype frequencies of TNF-alpha gene promoter at position -308 and -238 were not different between the clearance and the persistence group in univariate analysis, but in multivariate analysis after adjusting for age and sex, -308G/-238G homozygotes were associated with HBV persistence (P = 0.005). Genotype distributions of both gene promoters in inactive carriers were similar to those in patients with chronic progressive liver disease. CONCLUSIONS: The carriers of the -592A allele in the IL-10 promoter and -308G/-238G haplotype homozygotes in the TNF-alpha promoter region have higher risk of persistent HBV infection.     

白介素-10基因启动子区单核苷酸多态性与乙肝病毒感染后的相关性研究

目的:研究白细胞介素-10(IL-10)基因启动子区域-1082、-592位点单核苷酸多态性(SNP)与乙肝病毒感染后临床转归之间的关系。方法:采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)方法分析175例乙型肝炎患者和153例正常对照者IL-10基因启动子区域-592、-1082位点的基因多态性,并结合临床资料进行统计学分析。结果:IL-10-592位点在患者组和正常对照组均发现AA、AC、CC 3种基因型,各基因型在患者组和对照组分布上差异均无显著性意义。而IL-10-1082位点在正常对照组有AA、AG、GG 3种基因型,而患者组只发现AA、AG两种基因型。经统计学分析,在基因型分布上,慢性乙型肝炎组与急性乙型肝炎组、重型肝炎组比较差异均有显著性意义(P0.001,P0.05);而与肝硬化组相比差异无显著性意义。另外,肝硬化组与急性乙型肝炎组基因型分布的差异亦有显著性意义(P=0.020)。结论:IL-10-1082A等位基因及AA基因型与乙肝病毒感染及感染后转归相关。     

肿瘤坏死因子基因多态性在慢性乙型肝炎患者中的分布

目的探讨肿瘤坏死因子(TNF)基因多态性与慢性乙型肝炎病毒(HBV)感染者临床类型之间的关系。方法运用聚合酶链反应限制性片段长度多态性(PCRRFLP)分析的方法检测TNFα基因启动子区308位和TNFβ基因第一内含子252位的单个核苷酸多态性(SNPs)在不同临床类型的慢性HBV感染者及健康对照者中的分布频率,并用放射免疫法测定其血清TNFα浓度。结果56例慢性重型乙型肝炎患者(CSHB)中TNF1/2基因型频率及TNF2等位基因频率均显著高于健康对照组(90例)(25%vs11.1%,P=0.028;12.5%vs5.6%,P=0.036)和慢性轻度乙型肝炎及无症状携带者(AsC)组(71例)(25%vs8.5%,P=0.011;12.5%vs4.2%,P=0.015),且CSHB患者中,TNF1/2杂合子的血清TNFα及胆红素(TBiL)水平明显高于TNF1/1纯合子(P<0.05)。CSHB组与健康对照组的TNFβ2/2基因型及TNFβ2等位基因分布差异无统计学意义,而慢性轻度乙型肝炎患者及AsC组的TNFβ2/2基因型频率显著低于健康对照组(9.9%vs24.4%,P=0.043)和CSHB组(9.9%vs26.8%,P=0.043)。结论TNF基因多态性与HBV感染者的临床类型有关,可能为其宿主因素之一。     

Association between dementia and hepatitis B and C virus infection

Several viral infections are known to increase the risk of dementia through brain cell damage and systemic infection. The association between hepatitis B and C virus (HBV and HCV) infections and dementia was evaluated using a national sample cohort from South Korea. Using the national cohort study from the Korean National Health Insurance Service, we extracted data for patients with HBV or HCV infection and for matched control participants. The controls were matched to the patients according to age, sex, income, region of residence, and past medical histories. The incidence of HCV infection was higher in the dementia group (1.0% [113/11,228]) than in the control group (0.8% [364/44,912], P = .043). However, there was no difference in the incidence of HBV infection in the dementia and control groups. The adjusted odds ratio (OR) for HCV infection was 1.25 (95% confidence interval [CI] = 1.01–1.54, P = .043) in the dementia group. According to the subgroup analysis by sex, the adjusted ORs for HCV infection were 1.04 (95% CI = 072–1.49, P = .851) in men and 1.38 (95% CI = 1.06–1.79, P = .016) in women. We concluded that the incidence of HCV infection was higher (with a higher OR) in women with dementia than in matched control participants in South Korea.     

Cytokine and apoptosis gene polymorphisms influence the outcome of hepatitis C virus infection

BACKGROUND:Hepatitis C virus (HCV) infection is thought to be chronic and the factors leading to viral clearance or persistence are poorly understood.This study was undertaken to investigate the possibility of a significant relationship between the spontaneous clearance or the persistence of hepatitis C virus (HCV) infection and cytokine and apoptosis gene polymorphisms in Tunisian patients on hemodialysis.METHODS:Polymorphisms of the genes IL-1 (-889 IL-1α,-511 and +3954 IL-1β,IL-1Ra),IL-18 (-137 and-607),...