慢性乙型肝炎患者外周血单个核细胞中 HBV cccDNA 预测拉米夫定的治疗效果
郭皓宇,谭德明,徐旭雯,中南大学湘雅医院感染病科 湖南省长沙市 410008
郭皓宇,男,1972-10-22, 湖南省沅江市人, 2002年中南大学湘雅医学院博士,主要从事病毒性肝炎的研究.
通讯作者:谭德明,410008, 湖南省长沙市湘雅路87号,中南大学湘雅医院感染科. guohaoyudf@tom.com
收稿日期:2005-03-01 接受日期:2005-03-16
Predictive value of HBV cccDNA in PBMC of response tolamivudine therapy in patients with chronic hepatitis B
, 百拇医药
Hao-Yu Guo, De-Ming Tan, Xu-Wen Xu
Hao-Yu Guo,De-Ming Tan, Xu-Wen Xu, Department of Infectious Diseases, XiangyaHospital, Central South University, Changsha 410008, Hunan Province, China
Correspondence to: Dr De-Ming Tan, Department of InfectiousDiseases, Xiangya Hosipital, 87 Xiangya Road, Changsha 410078, HunanProvince, China. guohaoyudf@tom.com
Received: 2005-03-01 Accepted:2005-03-16
, 百拇医药
Abstract
AIM: To assess the value of hepatitis B virus (HBV) covalently closedcircle DNA (cccDNA) in peripheral blood mononuclear cells (PBMC) for theprediction of the sustained response to lamivudine therapy in patientswith chronic hepatitis B.
METHODS: Seventeen chronic hepatitis B patients with complete orpartial response (serum HBV DNA turned negative, and ALT was normalizedwith or without HBeAg/anti-HBe seroconversion) were selected. HBV cccDNAin PBMC was detected at the end of lamivudine treatment, and 1 year aftertreatment.
, 百拇医药
RESULTS: Nine out of 17 patients were positive for HBV cccDNA intheir PBMC at the end of lamivudine treatment. Virological relapse werefound during 1-year follow-up in all of these 9 patients; whereas only 1relapse was observed among the 8 patients without HBV cccDNA.
CONCLUSION: HBV cccDNA in PBMC at the end of treatment is of goodpredictive value for the sustained response to lamivudine treatment inchronic hepatitis B patients.
, 百拇医药
Key Words: Chronic hepatitis B; Hepatitis B virus; cccDNA; Peripheralblood mononuclear cells; Lamivudine
Guo HY, Tan DM, Xu XW. Predictive value of HBV cccDNA in PBMC of responseto lamivudine therapy in patients with chronic hepatitis B. Shijie HuarenXiaohua Zazhi 2005;13(10):1202-1205
摘要
目的:探讨慢性乙型肝炎拉米夫定治疗结束时,外周血单个核细胞(PBMC)中HBVcccDNA(乙型肝炎病毒共价闭合环状DNA)检测对拉米夫定持续应答的预测作用.
, 百拇医药
方法:对慢性乙型肝炎患者17例进行拉米夫定治疗48wk,获得完全或部分疗效(血清HBV DNA转阴,ALT复常,伴或不伴HBeAg血清转换),48 wk治疗结束时检测PBMC中HBVcccDNA, 并对患者进行1 a的血清HBVDNA监测.
结果:治疗结束时PBMC中HBV cccDNA为阳性9例,阴性8例.在PBMC中HBVcccDNA阳性者,停止治疗的1a内所有患者的血清HBVDNA阳转.而PBMC中HBVcccDNA阴性者,1例血清HBVDNA阳转.
结论:拉米夫定治疗结束时PBMC中HBV cccDNA的检测可能对拉米夫定治疗能否获得持续应答具有预测价值.
关键词:慢性乙型肝炎;乙型肝炎病毒; 共价闭合环状DNA; 外周血单个核细胞;拉米夫定
, 百拇医药
郭皓宇,谭德明, 徐旭雯.慢性乙型肝炎患者外周血单个核细胞中HBV cccDNA 预测拉米夫定的治疗效果.世界华人消化杂志 2005;13(10):1202-1205
1 (PDF)应用实时荧光定量PCR检测HBV cccDNA结果(阳性:曲线超过桔红色基线以上;阴性:曲线未达到桔红色基线).A: 质粒DNA(阳性对照); B: 阴性对照;C: 血清HBV DNA阳性患者PBMC DNA; D: HBV DNA阳性血清.
图2 (PDF) 17例慢性乙型肝炎患者PBMC中HBV cccDNA检测情况.A: 实时荧光定量PCR扩增曲线示意图:共22条曲线,分别为:3份阳性标准定量标本(质粒DNA,分别为2×106,105,104copies),17份PBMC标本,1份HBVDNA阳性血清标本,1份阴性对照;其中曲线在基线之上者12条(阳性),在基线之下者10条(阴性).B: 实时荧光定量PCR标准曲线示意图:此曲线显示了所有阳性产物的Ct值(线上的点即代表Ct值,Ct值对应着一个产物的copy数;蓝点为已知标本;红点为待测标本.如图所示,PBMC中HBVcccDNA阳性的标本,其滴度基本上集中在10-3copies/cell左右.
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2.2PBMC中HBVcccDNA与拉米夫定停药后复发的关系PBMC中检出了HBVcccDNA阳性患者9例,随访中有全部复发,其中3mo时复发3例;6 mo时复发8例;随访1 a时,全部患者的血清HBVDNA阳转,伴有ALT升高7例.8例PBMC中未检出HBVcccDNA者,1例患者于停药后6mo血清HBVDNA阳转,但ALT正常(P<0.01).
2.3PBMC中HBVcccDNA与HBeAg/抗HBe血清变化的关系 拉米夫定治疗48 wk时,HBeAg阳性者6例,PBMC中HBVcccDNA阳性5例;而7例抗HBe阳性患者的PBMC中HBVcccDNA仅1例;PBMC中HBVcccDNA与血清HBeAg阳性有伴随关系(P<0.05).
3 讨论
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治疗慢性乙型肝炎的关键措施是抗病毒治疗.目前已批准使用的抗病毒药物中最常用的是干扰素与拉米夫定.拉米夫定抑制HBV复制的作用迅速而确切,但过早停药,或未取得HBeAg/抗HBe血清转换的情况下停药,HBV再次复制活跃,血清HBVDNA再次阳性,以及由此导致的肝炎复发率较高.拉米夫定停药后易复发的原因可能与药物对HBV复制的关键中间体HBVcccDNA无直接的抑制作用,因此,拉米夫定治疗有效后血清HBVDNA阴转,但感染的细胞内HBVcccDNA很可能仍然阳性,成为拉米夫定停药后HBV再次复制活跃的来源.HBVcccDNA存在于HBV感染的人体细胞内,主要是肝细胞,其次是外周血单个核细胞(PBMC)[10-11].我们应用实时荧光PCR检测慢性乙型肝炎患者PBMC中HBVcccDNA,取得了较好的效果.在拉米夫定治疗48wk后,17例患者尽管血清HBVDNA均阴性,但有9例患者PBMC中可以检出低水平的HBVcccDNA.似乎表明拉米夫定对HBVcccDNA抑制作用较差,血清HBVDNA阴转不能代表细胞内HBVDNA被清除.一些体外试验的结果表明拉米夫定对HBVcccDNA无抑制作用[4,12-13],但我们发现17例患者治疗后有8例PBMC中HBVcccDNA呈阴性,9例阳性者其HBVcccDNA滴度也不高,这有可能是拉米夫定的长期应用,通过间接的作用,减少和消耗了细胞中的HBVcccDNA,使其滴度下降和阴转,这提示经过长期的抗病毒治疗是有可能清除体内的HBV.
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对17例经拉米夫定治疗取得初步疗效而停药的患者进行1a的随访研究(拉米夫定治疗后肝炎复发绝大部分发生在停药后的1a中[8]).有10例患者血清HBVDNA再次阳性,复发率58.8%.在复发的10例患者中,停药时PBMC中有9例检出HBVcccDNA.由此可见,HBVcccDNA确与拉米夫定停药后病毒再次复制活跃有关,甚至可能即为复发的来源.从另一个角度讲,对停药时PBMC中HBVcccDNA的检测也可能有助于医师对停药后复发可能性的预测.在拉米夫定临床应用专家指导意见中[8],强调了HBeAg/抗HBe血清转换对持续应答的重要性.从本结果来看,确实是发生了HBeAg/抗HBe血清转换的患者其停药后复发率(1/7,14.3%)明显地低于未发生HBeAg/抗HBe血清转换患者的复发率(6/7,85.7%);PBMC中HBVcccDNA的检出率(1/9,11.1%)明显地低于未发生HBeAg/抗HBe血清转换患者的检出率(8/9,88.9%).此外,尽管HBeAg/抗HBe血清转换对抗病毒停药后的复发能起到较好的预见作用,但仍有一些已发生HBeAg/抗HBe血清转换者停药后复发的例子[14].我们也观察到,发生了HBeAg/抗HBe血清转换者中,有1例PBMC中检出了HBV cccDNA,这例患者在停药1a内复发.因此,在观察HBeAg/抗HBe血清转换的同时,监测PBMC中HBV cccDNA,可能更好地帮助临床医师预测拉米夫定停药后复发地可能性,指导医师更合理地应用拉米夫定及其他抗病毒药物治疗.
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4 参考文献1 Mazur W, Krol F, Cianciara J, Nazzal K, Gladysz A, Juszczyk J,Bolewska B, Adamek J, Czajka B, Swietek K, Kryczka W,Gonciarz Z. A multi-center open study todetermine the effect of lamivudine on HBV DNA clearance and to assessthe
safety of the regimen in patients withchronic hepatitis B infection. Med Sci Monit 2002;8:CR257-262
2 Leung NW, Lai CL, Chang TT, Guan R, Lee CM, Ng KY, Lim SG, Wu PC,Dent JC, Edmundson S, Condreay LD, Chien RN;
, 百拇医药
On behalf of the Asia hepatitis lamivudinestudy group. Extended lamivudine treatment in patients with chronichepatitis
B enhances hepatitis Be antigenseroconversion rates: results after 3 years of therapy. Hepatology 2001;33:1527-1532
3 Dienstag JL, Schiff ER, Mitchell M, Casey DE Jr, Gitlin N, LissoosT, Gelb LD, Condreay L, Crowther L, Rubin M, Brown N.
Extended lamivudine retreatment for chronichepatitis B:maintenance of viral suppression after discontinuation
, 百拇医药
oftherapy. Hepatology 1999;30:1082-1087
4 Abdelhamed AM, Kelley CM, Miller TG, Furman PA, Isom HC. Rebound ofhepatitis B virus replication in HepG2 cells
after cessation of antiviral treatment. JVirol 2002;76:8148-8160
5 Leung N. Treatment of chronic hepatitis B: case selection andduration of therapy. J Gastroenterol Hepatol
2002;17:409-414
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6 Mason AL, Xu L, Guo L, Kuhns M, Perrillo RP. Molecular basis forpersistent hepatitis B virusinfection in the liver
after clearance of serum hepatitis Bsurface antigen. Hepatology 1998;27:1736-1742
7 中华医学会传染病与寄生虫病学分会, 肝脏学分会. 病毒性肝炎防治方案. 中华肝脏病杂志 2000;8:324-329
8 拉米夫定临床应用专家. 2003年拉米夫定临床应用专家共识. 中华肝脏病杂志 2003;11:497-499
9 Shao JB, Chen Z, Ni WQ, Fan J. A quantitative method to detect HBV cccDNA by chimeric primer and real-time
, http://www.100md.com
polymerase chain reaction. J Virol Methods 2003;112:45-52
10 Cabrerizo M, Bartolom inverted question marke J, Caramelo C, Barril G, Carreno V. Molecular analysis of hepatitis B
virus DNA in serum and peripheral blood mononuclear cells from hepatitis B surface antigen-negative cases.
Hepatology 2000;32:116-123
11 Stoll-Becker S, Repp R, Glebe D, Schaefer S, Kreuder J, Kann M, Lampert F, Gerlich WH. Transcription of hepatitis B
, 百拇医药
virus in peripheral blood mononuclear cells from persistently infected patients. J Virol 1997;71:5399-5407
12 Dandri M, Burda MR, Will H, Petersen J. Increased hepatocyte turnover and inhibition of woodchuck hepatitis B virus
replication by adefovir in vitro do not lead to reduction of the closed circular DNA. Hepatology 2000;32:139-146
13 Moraleda G, Saputelli J, Aldrich CE, Averett D, Condreay L, Mason WS. Lack of effect of antiviral therapy in
nondividing hepatocyte cultures on the closed circular DNA of woodchuck hepatitis virus. J Virol 1997;71:9392-9399
14 张晓红, 林国莉, 朱建芸, 陈黎, 杨绍基, 肖杰生. 拉米夫定停药后慢性乙型肝炎复发的临床特点及相关因素.
中华肝脏病杂志 2004;12:601-604
编辑 潘伯荣 审读 张海宁, 百拇医药( 郭皓宇, 谭德明, 徐旭雯)
郭皓宇,男,1972-10-22, 湖南省沅江市人, 2002年中南大学湘雅医学院博士,主要从事病毒性肝炎的研究.
通讯作者:谭德明,410008, 湖南省长沙市湘雅路87号,中南大学湘雅医院感染科. guohaoyudf@tom.com
收稿日期:2005-03-01 接受日期:2005-03-16
Predictive value of HBV cccDNA in PBMC of response tolamivudine therapy in patients with chronic hepatitis B
, 百拇医药
Hao-Yu Guo, De-Ming Tan, Xu-Wen Xu
Hao-Yu Guo,De-Ming Tan, Xu-Wen Xu, Department of Infectious Diseases, XiangyaHospital, Central South University, Changsha 410008, Hunan Province, China
Correspondence to: Dr De-Ming Tan, Department of InfectiousDiseases, Xiangya Hosipital, 87 Xiangya Road, Changsha 410078, HunanProvince, China. guohaoyudf@tom.com
Received: 2005-03-01 Accepted:2005-03-16
, 百拇医药
Abstract
AIM: To assess the value of hepatitis B virus (HBV) covalently closedcircle DNA (cccDNA) in peripheral blood mononuclear cells (PBMC) for theprediction of the sustained response to lamivudine therapy in patientswith chronic hepatitis B.
METHODS: Seventeen chronic hepatitis B patients with complete orpartial response (serum HBV DNA turned negative, and ALT was normalizedwith or without HBeAg/anti-HBe seroconversion) were selected. HBV cccDNAin PBMC was detected at the end of lamivudine treatment, and 1 year aftertreatment.
, 百拇医药
RESULTS: Nine out of 17 patients were positive for HBV cccDNA intheir PBMC at the end of lamivudine treatment. Virological relapse werefound during 1-year follow-up in all of these 9 patients; whereas only 1relapse was observed among the 8 patients without HBV cccDNA.
CONCLUSION: HBV cccDNA in PBMC at the end of treatment is of goodpredictive value for the sustained response to lamivudine treatment inchronic hepatitis B patients.
, 百拇医药
Key Words: Chronic hepatitis B; Hepatitis B virus; cccDNA; Peripheralblood mononuclear cells; Lamivudine
Guo HY, Tan DM, Xu XW. Predictive value of HBV cccDNA in PBMC of responseto lamivudine therapy in patients with chronic hepatitis B. Shijie HuarenXiaohua Zazhi 2005;13(10):1202-1205
摘要
目的:探讨慢性乙型肝炎拉米夫定治疗结束时,外周血单个核细胞(PBMC)中HBVcccDNA(乙型肝炎病毒共价闭合环状DNA)检测对拉米夫定持续应答的预测作用.
, 百拇医药
方法:对慢性乙型肝炎患者17例进行拉米夫定治疗48wk,获得完全或部分疗效(血清HBV DNA转阴,ALT复常,伴或不伴HBeAg血清转换),48 wk治疗结束时检测PBMC中HBVcccDNA, 并对患者进行1 a的血清HBVDNA监测.
结果:治疗结束时PBMC中HBV cccDNA为阳性9例,阴性8例.在PBMC中HBVcccDNA阳性者,停止治疗的1a内所有患者的血清HBVDNA阳转.而PBMC中HBVcccDNA阴性者,1例血清HBVDNA阳转.
结论:拉米夫定治疗结束时PBMC中HBV cccDNA的检测可能对拉米夫定治疗能否获得持续应答具有预测价值.
关键词:慢性乙型肝炎;乙型肝炎病毒; 共价闭合环状DNA; 外周血单个核细胞;拉米夫定
, 百拇医药
郭皓宇,谭德明, 徐旭雯.慢性乙型肝炎患者外周血单个核细胞中HBV cccDNA 预测拉米夫定的治疗效果.世界华人消化杂志 2005;13(10):1202-1205
1 (PDF)应用实时荧光定量PCR检测HBV cccDNA结果(阳性:曲线超过桔红色基线以上;阴性:曲线未达到桔红色基线).A: 质粒DNA(阳性对照); B: 阴性对照;C: 血清HBV DNA阳性患者PBMC DNA; D: HBV DNA阳性血清.
图2 (PDF) 17例慢性乙型肝炎患者PBMC中HBV cccDNA检测情况.A: 实时荧光定量PCR扩增曲线示意图:共22条曲线,分别为:3份阳性标准定量标本(质粒DNA,分别为2×106,105,104copies),17份PBMC标本,1份HBVDNA阳性血清标本,1份阴性对照;其中曲线在基线之上者12条(阳性),在基线之下者10条(阴性).B: 实时荧光定量PCR标准曲线示意图:此曲线显示了所有阳性产物的Ct值(线上的点即代表Ct值,Ct值对应着一个产物的copy数;蓝点为已知标本;红点为待测标本.如图所示,PBMC中HBVcccDNA阳性的标本,其滴度基本上集中在10-3copies/cell左右.
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2.2PBMC中HBVcccDNA与拉米夫定停药后复发的关系PBMC中检出了HBVcccDNA阳性患者9例,随访中有全部复发,其中3mo时复发3例;6 mo时复发8例;随访1 a时,全部患者的血清HBVDNA阳转,伴有ALT升高7例.8例PBMC中未检出HBVcccDNA者,1例患者于停药后6mo血清HBVDNA阳转,但ALT正常(P<0.01).
2.3PBMC中HBVcccDNA与HBeAg/抗HBe血清变化的关系 拉米夫定治疗48 wk时,HBeAg阳性者6例,PBMC中HBVcccDNA阳性5例;而7例抗HBe阳性患者的PBMC中HBVcccDNA仅1例;PBMC中HBVcccDNA与血清HBeAg阳性有伴随关系(P<0.05).
3 讨论
, 百拇医药
治疗慢性乙型肝炎的关键措施是抗病毒治疗.目前已批准使用的抗病毒药物中最常用的是干扰素与拉米夫定.拉米夫定抑制HBV复制的作用迅速而确切,但过早停药,或未取得HBeAg/抗HBe血清转换的情况下停药,HBV再次复制活跃,血清HBVDNA再次阳性,以及由此导致的肝炎复发率较高.拉米夫定停药后易复发的原因可能与药物对HBV复制的关键中间体HBVcccDNA无直接的抑制作用,因此,拉米夫定治疗有效后血清HBVDNA阴转,但感染的细胞内HBVcccDNA很可能仍然阳性,成为拉米夫定停药后HBV再次复制活跃的来源.HBVcccDNA存在于HBV感染的人体细胞内,主要是肝细胞,其次是外周血单个核细胞(PBMC)[10-11].我们应用实时荧光PCR检测慢性乙型肝炎患者PBMC中HBVcccDNA,取得了较好的效果.在拉米夫定治疗48wk后,17例患者尽管血清HBVDNA均阴性,但有9例患者PBMC中可以检出低水平的HBVcccDNA.似乎表明拉米夫定对HBVcccDNA抑制作用较差,血清HBVDNA阴转不能代表细胞内HBVDNA被清除.一些体外试验的结果表明拉米夫定对HBVcccDNA无抑制作用[4,12-13],但我们发现17例患者治疗后有8例PBMC中HBVcccDNA呈阴性,9例阳性者其HBVcccDNA滴度也不高,这有可能是拉米夫定的长期应用,通过间接的作用,减少和消耗了细胞中的HBVcccDNA,使其滴度下降和阴转,这提示经过长期的抗病毒治疗是有可能清除体内的HBV.
, 百拇医药
对17例经拉米夫定治疗取得初步疗效而停药的患者进行1a的随访研究(拉米夫定治疗后肝炎复发绝大部分发生在停药后的1a中[8]).有10例患者血清HBVDNA再次阳性,复发率58.8%.在复发的10例患者中,停药时PBMC中有9例检出HBVcccDNA.由此可见,HBVcccDNA确与拉米夫定停药后病毒再次复制活跃有关,甚至可能即为复发的来源.从另一个角度讲,对停药时PBMC中HBVcccDNA的检测也可能有助于医师对停药后复发可能性的预测.在拉米夫定临床应用专家指导意见中[8],强调了HBeAg/抗HBe血清转换对持续应答的重要性.从本结果来看,确实是发生了HBeAg/抗HBe血清转换的患者其停药后复发率(1/7,14.3%)明显地低于未发生HBeAg/抗HBe血清转换患者的复发率(6/7,85.7%);PBMC中HBVcccDNA的检出率(1/9,11.1%)明显地低于未发生HBeAg/抗HBe血清转换患者的检出率(8/9,88.9%).此外,尽管HBeAg/抗HBe血清转换对抗病毒停药后的复发能起到较好的预见作用,但仍有一些已发生HBeAg/抗HBe血清转换者停药后复发的例子[14].我们也观察到,发生了HBeAg/抗HBe血清转换者中,有1例PBMC中检出了HBV cccDNA,这例患者在停药1a内复发.因此,在观察HBeAg/抗HBe血清转换的同时,监测PBMC中HBV cccDNA,可能更好地帮助临床医师预测拉米夫定停药后复发地可能性,指导医师更合理地应用拉米夫定及其他抗病毒药物治疗.
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4 参考文献1 Mazur W, Krol F, Cianciara J, Nazzal K, Gladysz A, Juszczyk J,Bolewska B, Adamek J, Czajka B, Swietek K, Kryczka W,Gonciarz Z. A multi-center open study todetermine the effect of lamivudine on HBV DNA clearance and to assessthe
safety of the regimen in patients withchronic hepatitis B infection. Med Sci Monit 2002;8:CR257-262
2 Leung NW, Lai CL, Chang TT, Guan R, Lee CM, Ng KY, Lim SG, Wu PC,Dent JC, Edmundson S, Condreay LD, Chien RN;
, 百拇医药
On behalf of the Asia hepatitis lamivudinestudy group. Extended lamivudine treatment in patients with chronichepatitis
B enhances hepatitis Be antigenseroconversion rates: results after 3 years of therapy. Hepatology 2001;33:1527-1532
3 Dienstag JL, Schiff ER, Mitchell M, Casey DE Jr, Gitlin N, LissoosT, Gelb LD, Condreay L, Crowther L, Rubin M, Brown N.
Extended lamivudine retreatment for chronichepatitis B:maintenance of viral suppression after discontinuation
, 百拇医药
oftherapy. Hepatology 1999;30:1082-1087
4 Abdelhamed AM, Kelley CM, Miller TG, Furman PA, Isom HC. Rebound ofhepatitis B virus replication in HepG2 cells
after cessation of antiviral treatment. JVirol 2002;76:8148-8160
5 Leung N. Treatment of chronic hepatitis B: case selection andduration of therapy. J Gastroenterol Hepatol
2002;17:409-414
, 百拇医药
6 Mason AL, Xu L, Guo L, Kuhns M, Perrillo RP. Molecular basis forpersistent hepatitis B virusinfection in the liver
after clearance of serum hepatitis Bsurface antigen. Hepatology 1998;27:1736-1742
7 中华医学会传染病与寄生虫病学分会, 肝脏学分会. 病毒性肝炎防治方案. 中华肝脏病杂志 2000;8:324-329
8 拉米夫定临床应用专家. 2003年拉米夫定临床应用专家共识. 中华肝脏病杂志 2003;11:497-499
9 Shao JB, Chen Z, Ni WQ, Fan J. A quantitative method to detect HBV cccDNA by chimeric primer and real-time
, http://www.100md.com
polymerase chain reaction. J Virol Methods 2003;112:45-52
10 Cabrerizo M, Bartolom inverted question marke J, Caramelo C, Barril G, Carreno V. Molecular analysis of hepatitis B
virus DNA in serum and peripheral blood mononuclear cells from hepatitis B surface antigen-negative cases.
Hepatology 2000;32:116-123
11 Stoll-Becker S, Repp R, Glebe D, Schaefer S, Kreuder J, Kann M, Lampert F, Gerlich WH. Transcription of hepatitis B
, 百拇医药
virus in peripheral blood mononuclear cells from persistently infected patients. J Virol 1997;71:5399-5407
12 Dandri M, Burda MR, Will H, Petersen J. Increased hepatocyte turnover and inhibition of woodchuck hepatitis B virus
replication by adefovir in vitro do not lead to reduction of the closed circular DNA. Hepatology 2000;32:139-146
13 Moraleda G, Saputelli J, Aldrich CE, Averett D, Condreay L, Mason WS. Lack of effect of antiviral therapy in
nondividing hepatocyte cultures on the closed circular DNA of woodchuck hepatitis virus. J Virol 1997;71:9392-9399
14 张晓红, 林国莉, 朱建芸, 陈黎, 杨绍基, 肖杰生. 拉米夫定停药后慢性乙型肝炎复发的临床特点及相关因素.
中华肝脏病杂志 2004;12:601-604
编辑 潘伯荣 审读 张海宁, 百拇医药( 郭皓宇, 谭德明, 徐旭雯)
