Association between chronic hepatitis C infection and metabolic syndrome: A meta-analysis

BackgroundHepatitis C virus (HCV) infected patients have been found to be more susceptible to metabolic syndrome (MetS), but the results remain unclear and lack of a meta-analysis.MethodsDatabases including PubMed, Web of Science, EMBASE and the Cochrane Library were searched to identify all studies concerning HCV and MetS. Funnel plots combined with Begg's tests and Egger's tests were used to analysis the possible publication bias. The odds ratios (ORs) with 95% confidence intervals (CIs) were used to access the effect of HCV infection on the risk of MetS.ResultsEight articles, involving a total of 57387 HCV patients were included. HCV infection was significantly associated with an increased incidence of MetS (OR = 1.73; 95% CI, 1.19–2.52). After adjustment according to the sensitivity analysis, one included article was removed to decrease the publication bias and high heterogeneity, of which the results showed that HCV infection was still associated with an increased incidence of MetS (OR = 1.93; 95% CI, 1.39–2.68).ConclusionsHCV patients tend to have a significant increased risk for MetS, but more large-scale studies are needed to confirm this and explore the exact mechanism.     

重庆市北碚区居民丙肝知识知晓率及相关行为现状调查

目的了解重庆市北碚区居民丙肝知识知晓率、高危行为现状及两者之间的关系,为构建提高居民丙肝安全行为的干预方式提供科学依据。方法2018—2019年期间根据《重庆市丙肝防治知识知晓率基线调查方案》要求采取分层随机抽样法抽取重庆市北碚区居民开展丙肝知识、高危行为问卷调查,采用SPSS 20.0软件对数据进行分析,以P<0.05为差异有统计学意义。结果共调查200名居民,丙肝防治知识问题回答对6道及以上51人(25.5%),全部答对仅4人(2.0%),全部答错103人(51.5%)。丙肝防治知识知晓率与文化程度有关(P<0.05),与人群类别、家庭人均月收入、年龄、性别等因素不相关(P均>0.05)。丙肝防治知识知晓与不知晓的高危行为发生率比较,差异无统计学意义(χ²=0.966,P=0.367)。结论该地区人群丙肝防治知识知晓率还处于较低水平,建议在今后的工作中应针对丙肝制定详细宣教计划,组织开展各种形式的宣教活动,有效引导公众提高丙肝防治意识。     

丙型肝炎病毒母婴传播研究

目的：探讨HCV母婴传播的可能性及其在流行病学中的意义。方法：应用ELISA方法对2136名产前检查的孕妇进行了抗－HCV检测,抗－HCV阳性者进一步应用PCR检测其HCV－RNA并收集其婴儿脐血进行抗－HCV和HCV－RNA检测。结果：孕妇的抗－HCV阳性率为1.59%(34/2136),抗－HCV阳性母亲的HCV－RNA阳性率为47.06%(16/34),母亲HCV－RNA阳性者发生垂直传播率为53.3%。结论 ：应用抗－HCV评价母婴传播并不合和达,只有通过检测HCV－RNA方能证实感染的存在。HCV确实存在母婴传播,但在人群HCV流行中并非主要传播途径。母新肝功能异常是影响HCV母婴传播的一个重要因素。     

首次及重复感染HCV后抗体及HCV RNA的动态观察

本文报道对首次感染ＨＣＶ的１４人与重复输入含ＨＣＶ血的１１位感染者进行长达一年半的动态观察，总结出输入大量含ＨＣＶ血后导致的感染者在自然状态下ＨＣＶ ＲＮＡ及抗体变化的规律。７／８再次输入４００ｍｌ以上含ＨＣＶ血的感染者，其自身存在的高滴度抗体在受血后１～３个月下降０．５～１．０ＯＤ值。首次输出含ＨＣＶ血的感染者中，１１／１４的感染者３个月内ＡＬＴ高于参考值的３倍以上，而再次输入含ＨＣＶ血的患者中     

丙型肝炎病毒核酸疫苗的构建及小鼠体液免疫效果

目的 探讨核酸商以苗在HCV感染中的预防和治疗价值。方法 将HCV C区基因插入pEF质粒EF－1α下游,构建pEF-HCV C重组质料,然后经im及皮下注射免疫BALB／c小鼠,免疫次数分别为1,2,3,4次,ELISA法检测免疫小鼠血清中抗－HCV的水平。结果 接种后各组均检测到抗－HCV的水平。结果 接种后各组均检测到抗－HCV,但是抗体滴度较低,在不同的免疫次数中,4次免疫组抗体水平最高。结论 构建的HCV DNA重组体可诱发BALB／d小鼠产生体液免疫应答,加强免疫后可使血清中抗－HCV明显增高。     

剪切HCV RNA的HDV核酶的设计及活性测定

目的：探讨丁型肝炎病毒（Hepatitis D virus,HDV）核酶用于抗丙型肝炎病毒（Hepatitis C virus,HCV）基因治疗的可能性。方法：以HDV基因组核酶的假结样结构为基础,优化其茎IV区,改建基底物结合区,获得3种针对HCV RNA的HDV核酶RzC1、RzC2和RzC3。体外转录获取含HCV RNA5‘－非编码区（5‘-noncoding region,5‘-NCR）及部分C区在内的底物RNA（HCV RNA 5‘－NCR－C）,并进行5‘端放射性标记。在pH7.5、37℃、Mg^2 20mmol/L和去离子甲酰胺2.5mol/L等条件下,将核酶和底物按摩尔比100：1混合,在不同的时间点观察剪切百分率。结论：RzC1、RzC2对底物的剪切百分率随时间延长而递增,90min分别达24.9％、20.3％;未观察到RzC3有剪切活性。结论：经过结构构优化的HDV基因组核酶在合适的位点能够剪切异源性RNA分子HCV RNA。     

丙型肝炎病毒标志物测定的临床应用

目的 :探讨丙型肝炎病毒 (HCV)感染者血清及初乳中该病毒标志物存在状况。　方法 :对 2 44份 HCV感染者、33份对照血清和 35份 HCV特异性 Ig G抗体阳性的产妇、41份健康产妇的初乳进行 HCV四种标志物测定。抗HCV- Ig G、Ig M和 GOR抗体采用间接 EL ISA法 ,HCV C33抗原采用双抗体夹心 EL ISA法。　结果 :抗 HCV- Ig G、抗 HCV- Ig M、HCV C33和抗 GOR抗体四种标志物在慢性活动性丙型肝炎组检出率最高 ,分别为 10 0 .0 %、85 .7%、46 .4%和 6 4.3% ;急性输血后丙型肝炎组检出率为 6 6 .7%、10 0 .0 %、2 2 .9%和 42 .9% ;慢性稳定性丙型肝炎组为 94.1%、2 6 .5 %、17.6 %和 5 2 .9% ;血透患者组为 6 2 .6 %、31.3%、4.8%和 45 .6 %。血清抗 HCV Ig G阳性组初乳为 17.1%、2 .9%、8.5 %和 37.1%。血清和初乳对照组除 1例献血员血清抗 HCV- Ig G阳性外 ,其余均为阴性结果。　结论 :除抗 HCV- Ig G外 ,抗 HCV- Ig M、HCV C33和 GOR抗体三种标志物在 HCV感染的相关疾病组中 ,有一定的阳性检出率 ,均可作为 HCV感染的标志 ,可用于 HCV感染后的实验室诊断。     

Proteomics reveals a global phenotypic shift of NK cells in HCV patients treated with direct-acting antivirals

Chronic hepatitis C virus (HCV) infections compromise natural killer (NK)-cell immunity. Direct-acting antivirals (DAA) effectively eliminate HCV, but the long-term effects on NK cells in cured patients are debated. We conducted a proteomic study on CD56⁺ NK cells of chronic HCV-infected patients before and 1 year after DAA therapy. Donor-variation was observed in NK-cell proteomes of HCV-infected patients, with 46 dysregulated proteins restored after DAA therapy. However, 30% of the CD56⁺ NK-cell proteome remained altered 1 year post-therapy, indicating a phenotypic shift with low donor-variation. NK cells from virus-negative cured patients exhibited global regulation of RNA-processing and pathways related to “stimuli response”, “chemokine signaling”, and “cytotoxicity regulation”. Proteomics identified downregulation of vesicle transport components (CD107a, COPI/II complexes) and altered receptor expression profiles, indicating an inhibited NK-cell phenotype. Yet, activated NK cells from HCV patients before and after therapy effectively upregulated IFN-γ and recruited CD107a. Conversely, reduced surface expression levels of Tim-3 and 2B4 were observed before and after therapy. In conclusion, this study reveals long-term effects on the CD56⁺ NK-cell compartment in convalescent HCV patients 1 year after therapy, with limited abundance of vesicle transport complexes and surface receptors, associated with a responsive NK-cell phenotype.     

大剂量干扰素治疗慢性丙型肝炎50例临床观察

目的：探讨使用大剂量干扰素（ＩＦＮα）治疗慢性丙型肝炎（ＣＡＨ）的效果。方法：使用大剂量ＩＦＮα,每天６００万Ｕ,连续投药３周,以后每周３次间断投药２１周,共计２４周,治疗ＣＡＨ５０例。观察治疗前后血清ＨＣＶＲＮＡ与ＡＬＴ的变化,以此作为ＩＦＮ疗效的判定指标。结果：ＩＦＮ治疗ＣＡＨ有效率为６８％,停药６个月后有３４％复发。结论：ＩＦＮ的疗效与ＣＡＨ的基因亚型有关（Ⅲ型疗效显著,Ⅱ型较差）,与ＩＦＮ的剂量无明显关系。     

吸毒人群丙型肝炎病毒感染危险因素的研究

采用病例对照的研究方法,对广州市５３１名吸毒人员进行丙型肝炎病毒（ＨＣＶ）感染危险因素的调查,资料采用Ｌｏ－ｇｉｓｔｉｃ回归方法分析。结果表明：静脉吸毒（ＯＲ＝６．６８,Ｐ＜０．００１）,非固定婚外性伴侣（ＯＲ＝３．７１,Ｐ＜０．００１）,输液史（ＯＲ＝２．６４,Ｐ＜０．０１）和抗－ＨＢｃ阳性（ＯＲ＝１．７４,Ｐ＜０．０５）是ＨＣＶ感染独立的危险因素,而在性生活中使用避孕套（ＯＲ＝０．３７,Ｐ＜０．００５）是保护因素。提示广州市吸毒人群ＨＣＶ感染的主要途径是血液传播,同时性传播途径也起着重要的作用。