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肝组织cccDNA水平与血清病毒学应答后治疗时间的关系 总被引:2,自引:0,他引:2
目的 探讨慢性乙型肝炎(CHB)患者肝组织cccDNA水平与外周血HBV DNA<1000 拷贝/ml后继续治疗时间的关系.方法 分别采用荧光定量PCR、酶联免疫吸附分析法检测58例CHB患者肝组织HBV cccDNA水平、肝组织和血清HBV DNA载量、HBV标志物,分析肝组织HBV cccDNA水平、肝组织总HBV DNA水平、HBeAg血清学转换与血清病毒学应答后继续治疗时间的关系.组间比较采用Nemenyi法,相关分析采用Spearman法.结果 肝组织HBVcccDNA水平在血清HBV DNA两阳性组间尢明显差异,而阴性组明显低于阳性组(χ2=9.6948,P<0.01;χ2=9.2824,P<0.01).35例达到血清病毒学应答后行肝活组织检查的患者,肝组织cccDNA水平随继续治疗时间的延长而降低(χ2≥6.4674,P<0.05),肝组织cccDNA水平在抗-Hbe(+)组明显低于HBeAg(+)组、HBeAg(-)/抗-Hbe(-)组(χ2=10.7482,P<0.01;χ2=11.7549,P<0.01).14例肝组织cccDNA水平低十检测限的患者,有12例已经发生HBeAg血清学转换,占抗-Hbe(+)组的2/3,其在血清病毒学应答后继续治疗时间平均为35个月,发生HBeAg血清学转换后继续治疗时间平均为30个月.结论 当患者发生血清病毒学应答后,肝组织cccDNA水平随继续治疗时间延长而降低;继续治疗35个月以上且血清抗-Hbe持续(+)30个月以上时,有2/3的患者肝组织cccDNA定量低于检测限水平. 相似文献
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乙型肝炎患者血清中乙型肝炎病毒共价闭合环状DNA的检测 总被引:3,自引:1,他引:2
目的 检测不同肝脏病变程度的乙型肝炎患者外周血中的HBV共价闭合环状DNA(HBV cccDNA),评价其相关的影响因素和临床意义.方法 共观察57例乙型肝炎患者,其中轻度慢性乙型肝炎患者26例,重型乙型肝炎患者31例.患者入院后行PT、肝功能、肝炎病毒血清标志物等常规检测,并进行总HBV DNA和HBV cccDNA检测.Logistic逐步回归分析影响血清HBVcecDNA检出率的相关因素.结果重型乙型肝炎组13份血清标本HBV cccDNA为阳性,轻度慢性乙型肝炎组仅1份血清标本HBV cccDNA为阳性,血清HBV cccDNA的含量为1.25×103~4.88×104拷贝/mL,两组患者血清HBV cccDNA检出率差异有统计学意义(P=0.0014).血清HBV cccDNA检测诊断重型乙型肝炎患者的灵敏度和特异度分别为41.94%和96.15%.Logistic逐步回归分析显示,血清HBV ccvDNA的检出率与PT有关(X<'2>=7.2192,P=0.0072),而与患者的年龄、性别、血清总HBV DNA、TBil和ALT水平无相关性.结论 部分乙型肝炎患者特别是重型肝炎患者外周血中可以检测出HBV cccDNA,血清HBV cccDNA的检出可作为支持重型乙型肝炎诊断的指标之一. 相似文献
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共价闭合环状DNA(covalently dosed circular DNA,cccDNA)在HBV的复制及感染状态的建立过程中起着非常重要的作用,现将cccDNA的研究进展总结如下.
一、HBV cccDNA的检测方法
1.PCR法:PCR法包括普通PCR和定量PCR.由于松弛环状DNA(relaxed circular DNA,rcDNA)在负链和正链上存在缺口,我们可以设计一对跨越两个缺口的引物,由于cccDNA有完整的双链,可以被有选择地扩增.但起始模板量不能太高,否则rcDNA也有可能被扩增,Kock等[1]发现,每个PCR反应管中HBV DNA量在6×105拷贝/ml时能达到最佳的灵敏度与选择性. 相似文献
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Intrahepatic hepatitis B virus covalently closed circular DNA can be a predictor of sustained response to therapy 总被引:17,自引:0,他引:17
Sung JJ Wong ML Bowden S Liew CT Hui AY Wong VW Leung NW Locarnini S Chan HL 《Gastroenterology》2005,128(7):1890-1897
BACKGROUND & AIMS: This study aimed to determine whether intrahepatic hepatitis B virus (HBV) covalently closed circular (ccc) DNA and total HBV DNA levels at the end of therapy would predict sustained response to therapy. METHODS: Hepatitis B e antigen (HBeAg)-positive chronic hepatitis B patients receiving either lamivudine monotherapy or combination of peginterferon and lamivudine had liver biopsy at the end of 1 year therapy and were followed for 52 more weeks after cessation of therapy. Serum HBV DNA, intrahepatic HBV ccc DNA, and total HBV DNA levels were determined. RESULTS: Forty-seven patients, including 34 males and 13 females, were studied. Twenty-seven patients received combination therapy, and 20 patients received lamivudine monotherapy. Twenty-nine patients had end-of-treatment virologic response, and 15 patients had sustained response 52 weeks after therapy. At the end of treatment, log serum HBV DNA levels correlated well with log intrahepatic HBV cccDNA and log intrahepatic total HBV DNA levels. Log intrahepatic cccDNA and log intrahepatic total DNA levels were significantly lower among patients with sustained virologic response. The adjusted odds ratio for log cccDNA was 5.3 (95% CI: 1.5-18.2, P = .009) and, for log intrahepatic HBV DNA, was 4.4 (95% CI: 1.3-14.7, P = .015) to predict sustained virologic response. Using log cccDNA at -0.80 copies/genome equivalent as cutoff, the sensitivity, specificity, and positive and negative predictive values and accuracy of predicting sustained virologic response were 73%, 78%, 56%, 86%, and 77% respectively. CONCLUSIONS: Intrahepatic HBV cccDNA and intrahepatic total HBV DNA levels at the end of therapy are superior to serum HBV DNA as surrogates of sustained virologic response. 相似文献
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目的 应用滚环扩增(RCA)技术检测HBV共价闭合环状DNA(cccDNA),观察该方法的特异性和敏感性.方法 以HBV全基因质粒为模板,经酶切、连接、浓缩、胶回收纯化等步骤,构建和制备HBV cccDNA标准品.抽提7例慢性乙型肝炎患者肝组织总DNA,进行滚环扩增.用HBV cccDNA标准品、3.2 kb线性HBV DNA、健康肝组织总DNA及15例慢性乙型肝炎患者血清总DNA作为对照,验证此方法的特异性.将HBV cccDNA标准品进行系列稀释,了解该方法的敏感性.结果 成功构建了HBV cccDNA,并可用RCA方法进行扩增.RCA方法可从2 mg的慢性乙型肝炎患者肝组织中检测到HBV cccDNA,并可检测低至1×102拷贝/μL的HBV cccDNA.RCA方法不能检测3.2 kb线性HBV DNA,在健康肝组织及15例慢性乙型肝炎患者血清中亦检测不到HBV cccDNA.结论 RCA方法操作较方便,具有很高的特异性和敏感性. 相似文献
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目的 了解肝细胞内HBV共价闭合环状DNA( HBV cccDNA)核苷(酸)类药物耐药变异的情况,并比较其与松弛环状DNA(rcDNA)耐药变异的异同.方法 取40例慢性HBV感染肝移植患者的部分肝组织,采用十二烷基硫酸钠-蛋白质沉淀法结合DNA提取试剂盒分离提取肝内的HBV cccDNA和rcDNA.将抽提产物用不降解质粒的ATP依赖DNA酶酶切纯化后,用跨HBV基因组双链缺口并涵盖常见核苷类耐药位点(rt169~rt250)的引物行单轮PCR或套式PCR选择性扩增cccDNA.另用不跨双缺口的引物PCR扩增肝组织内的HBV rcDNA和患者肝移植术前的血清HBV rcDNA.用直接测序法对上述扩增产物进行基因测序并分析核苷(酸)类药物耐药位点的检出情况.结果 40例患者中,31例肝组织内检测到HBV cccDNA,35例肝组织检测到HBV rcDNA,21例肝移植术前血清中检测到HBV rcDNA.测序结果显示,2例肝组织内cccDNA、rcDNA和血清rcDNA均检测到rtM204Ⅰ变异;有2例患者肝内cccDNA、rcDNA分别存在rtM204Ⅰ、rtQ215H变异,而血清rcDNA未检测到相应变异;3例血清中分别存在rtM204V、rtM204V、rtV173L+ rtL180M+rtM204V变异,而肝内cccDNA和rcDNA未检测到相应变异.结论 慢性HBV感染者肝细胞内cccDNA可出现核苷(酸)类药物耐药变异,且肝组织内的cccDNA、rcDNA耐药变异株与血清中的rcDNA耐药变异株不完全一致. 相似文献
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HBV共价闭合环状DNA (covalently closed circular DNA,cccDNA)是HBV复制的初始模板.近年来,随着以选择性实时荧光PCR技术为代表的各类cccDNA检测技术日渐成熟,以及临床医生对cccDNA检测临床意义认识的不断提高,cccDNA检测已从基础研究逐渐进入到临床应用. 相似文献
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目的 定量检测慢性乙型肝炎(CHB)、乙型肝炎肝硬化(LC)、肝细胞癌(HCC)患者HBV总DNA(tDNA)、HBV共价闭合环状DNA (cccDNA)和HBsAg,并探讨其特点.方法 荧光定量PCR检测21例CHB、23例LC和25例HCC患者外周血和肝组织标本HBV tDNA、HBVcccDNA,化学发光法定量检测外周血HBsAg.正态数据采用ANOVA分析和t检验,相关性分析采用Pearson检验,非正态数据采用秩和检验.结果 在CHB、LC和HCC患者中,外周血HBVtDNA分别为(5.38±2.08)、(4.96±1.65)和(4.18±0.91)lg拷贝/mL,肝组织HBV tDNA分别为(7.18±1.91)、(6.51±1.87)和(5.87±1.47)lg拷贝/μg,肝组织HBV cccDNA分别为(3.53±2.03)、(2.63±2.13)和(0.58±1.40)lg拷贝/μg,外周血H BsAg分别为(3.30±0.65)、(3.12±0.52)和(2.60±1.03)lg IU/mL,CHB与HCC患者比较,差异均有统计学意义(t=2.446,P=0.013;t=2.562,P=0.014;t=5.799,P<0.01;t=2.709,P=0.003),LC与HCC患者肝组织HBVcccDNA及HBsAg定量比较,差异有统计学意义(t=-3.894,P<0.01;t=-2.237,P=0.023).外周血均未检出HBV cccDNA.HBsAg定量与外周血HBV tDNA(r=-0.290,P=0.016)、肝组织HBV tDNA(r=0.372,P=0.002)及肝组织HBV cccDNA(r=0.378,P=0.001)均有关.结论 HBV tDNA、HBV cccDNA、HBsAg在CHB、LC、HCC患者呈逐渐降低趋势,HBsAg定量与外周血HBV tDNA、肝组织HBV tDNA及肝组织HBV cccDNA有关. 相似文献
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目的 建立检测HBV共价闭合环状DNA(cccDNA)的套式一实时荧光定量PCR法.方法 根据HBV cccDNA与松环DNA(rcDNA)结构上的差异,设计2对跨缺口的特异引物及1条位于负链缺口下游的特异TaqMan荧光探针.根据Plasmid-SafeTM ATP-Dependent Dnasc(PSAD)对rcDNA与cccDNA作用的不同,对模板DNA进行酶切纯化,降解reDNA,再进行套式PCR扩增,先用外引物和模板进行第一轮常规PCR,再用内引物、荧光探针和第一轮PCR产物进行实时荧光定量PCR,根据阳性参照标准品,得出待检标本定量值.结果 检测阳性参照标准品.得出该方法灵敏度可达2 lg拷贝/mL.用上述方法检测34份乙型肝炎患者血清HBV DNA阳性标本,25份血清HBVcccDNA阳性,28份外周血单个核细胞HBV cccDNA阳性.27份健康对照者血清HBV DNA阴性标本,6份HBV cccDNA阳性.对5份HBV cccDNA阳性标本扩增产物进行克隆测序,无碱基缺失、突变.与HBV不同基因型序列(A~G)比较,同源性为90.6%~99.1%,其中,与B、C基因型同源性为95.3%~99.1%,验证了方法的特异度.结论 套式-实时定量PCR法可检测乙型肝炎患者血清、PBMC中的HBV CCCDNA,且具有敏感、特异性. 相似文献
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肝组织HBVcccDNA定量检测在慢性乙型肝炎诊断及治疗中的作用 总被引:2,自引:0,他引:2
目的探讨肝组织HBVcccDNA定量在慢性乙型肝炎(CHB)诊断和治疗中的意义。方法使用荧光PCR检测仪,对85例CHB患者肝组织HBVcccDNA行定量检测,同时行肝组织及血清HBV-DNA定量检测。结果①85例CHB患者肝组织均检测到HBVcccDNA;②肝组织HBVcccDNA定量与肝组织HBV.DNA定量呈高度相关,与血清HBV-DNA定量亦呈正相关;③45例HBeAg阳性CHB患者应用拉米夫定治疗48周后,肝组织HBVcccDNA仍可维持一定水平(特别是血清HBV-DNA定量低于检测水平以下者)。结论肝组织HBVcccDNA定量检测,是评价HBV复制、感染持续、临床药物抗HBV疗效的可靠指标。 相似文献
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乙型肝炎病毒cccDNA定量与乙型肝炎临床及病理关系 总被引:4,自引:1,他引:4
目的探讨慢性乙型肝炎(CHB)肝组织HBVcccDNA定量与乙型肝炎的关系。方法分别采用荧光定量PCR、酶联免疫吸附分析法(ELISA)检测48例CHB肝组织HBVcccDNA定量、肝组织和血清HB VDNA定量、乙型肝炎病毒标志物。同时用链霉菌抗生素蛋白-过氧化物酶连接法(SP)检测肝细胞中HBcAg表达。分析肝组织HBVcccDNA与组织和血清HBV DNA、HBeAg、肝细胞内HBcAg水平及肝脏炎症活动度的关系.结果1.肝组织HBVcccDNA定量与组织和血清HBV DNA定量呈正相关(r=0.837,P〈0.001;r=0.627,P〈0.005);2.肝组织HBV cccDNA定量与肝细胞内HBcAg半定量呈正相关(r=0.618,P〈0.005);3.肝组织HBV cccDNA定量与肝脏炎症活动度尤明显相关(P〉0.05):4.HBeAg阳性较抗-HBe阳性患者肝组织HBV cccDNA定量、肝组织和血清HBV DNA定量高(P〈0.05)。结论荧光定量PCR法检测肝组织HBV cccDNA定量是评价HBV复制最直接可靠的指标,在CHB的诊断和抗病毒治疗中有重要意义。但与肝组织炎症无明显相关。 相似文献
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《Journal of hepatology》2019,70(4):615-625
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慢性乙型肝炎患者肝组织中HBV cccDNA定量与病情的相关性分析 总被引:4,自引:0,他引:4
目的探讨肝组织HBV cccDNA定量对慢性乙型肝炎(乙肝)患者病情的影响。方法应用FQ—PRC法检测42例乙肝患者肝组织HBVcecDNA、肝组织和血清HBV—DNA水平,同时对肝组织行常规病理染色判断肝组织炎症及纤维化程度;SP法检测肝组织中HBsAg、HBcAg表达,化学发光法检测HBV标志物。分析肝组织HBVceeDNA与组织和血清HBV-DNA、肝细胞内HBsAg、HBcAg水平及肝脏炎症、纤维化程度的关系。结果肝组织HBVeecDNA定量与组织及血清HBV—DNA定量呈正相关(r=0.807,P〈0.001;r=0.627,P〈0.001);与肝组织炎症活动度及纤维化程度无明显相关性:肝组织HBVcccDNA定量与肝细胞内HBsAg表达无明显相关性,而与HB—cAg表达呈正相关(r=0.486,P〈0.05)。结论检测肝组织内HBVceeDNA可更精确反映HBV复制程度;对乙肝诊断、抗病毒治疗及选择停药时机具有重要价值。肝组织HBV cccDNA与血清HBV-DNA定量及HBcAg联合检测可指导抗病毒治疗。 相似文献
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Lu HY Zhuang LW Yu YY Si CW Li J Zhang JJ Zeng Z Chen XY Han ZH Chen Y 《World journal of gastroenterology : WJG》2008,14(8):1268-1273
AIM: To evaluate the effects of antiviral agents and HBV genotypes on intrahepatic covalently closed circular DNA (ccc DNA) in HBeAg-positive chronic hepatitis B patients.
METHODS: Seventy-one patients received lamivudine (n = 35), or sequential therapy with lamivudine- interferon alpha 2b (IFN-α 2b, n = 24) for 48 wk, or IFN-α 2b (n = 12) for 24 wk. All subjects were followed up for 24 wk. Intrahepatic ccc DNA was measured quantitatively by PCR. HBV genotypes were analyzed by PCR-RFLP.
RESULTS: Sequential lamivudine- INF-α therapy, lamivudine and INF-α monotherapy reduced ccc DNA of 1.7 log, 1.4 log and 0.8 log, respectively (P 〈 0.05). Seventeen out of the 71 patieots developed HBeAg seroconversion, the reduction of ccc DNA in the HBeAg seroconversion patients was more significant than that in the HBeAg positive patients (3.0 log vs 1.6 log, P = 0.0407). Twenty-four weeks after antiviral therapy withdrawal, 16 patients had a sustained virological response, the baseline intrahepatic ccc DNA in the patients with a sustained virological response was significantly lower than that in the patients with virological rebound (4.6 log vs 5.4 log, P = 0.0472). HBV genotype C accounted for 85.9% (n = 61), and genotype B for 14.1% (n = 10), respectively, in the 71 patients. There was no significant difference in the change of ccc DNA level between HBV genotypes C and B (2.1 log vs 1.9 log).
CONCLUSION: Forty-eight week sequential lamivudine- INF-α therapy and lamivudine monotherapy reduce ccc DNA more significantly than 24-wk INF-α monotherapy. Low baseline intrahepatic ccc DNA level may predict the long-term efficacy of antiviral treatment. HBV genotypes C and B have no obvious influence on ccc DNA load. 相似文献
METHODS: Seventy-one patients received lamivudine (n = 35), or sequential therapy with lamivudine- interferon alpha 2b (IFN-α 2b, n = 24) for 48 wk, or IFN-α 2b (n = 12) for 24 wk. All subjects were followed up for 24 wk. Intrahepatic ccc DNA was measured quantitatively by PCR. HBV genotypes were analyzed by PCR-RFLP.
RESULTS: Sequential lamivudine- INF-α therapy, lamivudine and INF-α monotherapy reduced ccc DNA of 1.7 log, 1.4 log and 0.8 log, respectively (P 〈 0.05). Seventeen out of the 71 patieots developed HBeAg seroconversion, the reduction of ccc DNA in the HBeAg seroconversion patients was more significant than that in the HBeAg positive patients (3.0 log vs 1.6 log, P = 0.0407). Twenty-four weeks after antiviral therapy withdrawal, 16 patients had a sustained virological response, the baseline intrahepatic ccc DNA in the patients with a sustained virological response was significantly lower than that in the patients with virological rebound (4.6 log vs 5.4 log, P = 0.0472). HBV genotype C accounted for 85.9% (n = 61), and genotype B for 14.1% (n = 10), respectively, in the 71 patients. There was no significant difference in the change of ccc DNA level between HBV genotypes C and B (2.1 log vs 1.9 log).
CONCLUSION: Forty-eight week sequential lamivudine- INF-α therapy and lamivudine monotherapy reduce ccc DNA more significantly than 24-wk INF-α monotherapy. Low baseline intrahepatic ccc DNA level may predict the long-term efficacy of antiviral treatment. HBV genotypes C and B have no obvious influence on ccc DNA load. 相似文献