应用ntPCR-RFLP技术检测乙型肝炎病毒阿德福韦耐药变异

目的建立一种简便、快速、实用的乙型肝炎病毒（HBV）阿德福韦（ADV）耐药变异-rtN236T变异及rtA181V变异的快速检测方法。方法根据GenBank收录的HBV基因全序设计巢式PCR引物，使野生株rt236NPCR产物中含有DraⅠ酶切位点（5′-TTTAAA-3′），而变异株rt236T无此限制性酶切位点；使野生株rt181APCR产物中含有BlpⅠ酶切位点（5′-GCTNAGC-3′），而变异株rt181V无此限制性酶切位点。选取4份应用ADV治疗1年以上出现HBVDNA反跳的临床耐药慢性乙型肝炎患者血清，经PCR扩增、限制性内切酶酶切及凝胶电泳，进行限制性片段长度多态性（RFLP）分析。并选择经该方法鉴定的野生株及变异株各1例进行HBVRT区基因序列分析。结果建立的ntPCR-RFLP方法可以检测到10^2copies／L的HBVDNA；RFLP分析结果与DNA测序结果一致，4份血清标本中检测到1份rtN236T变异，2份rtA181V变异。结论应用ntPCR-RFLP方法检测HBV阿德福韦耐药变异具有灵敏、特异、简便的优点，适用于HBV耐药变异的监测。     

ntPCR-RFLP检测HBV阿德福韦耐药变异-rtA181V变异

目的:建立一种简便、快速、实用的乙型肝炎病毒(HBV)阿德福韦(ADV)耐药变异- rtA181V变异的快速检测方法．方法:根据GenBank收录的HBV基因全序设计巢式PCR引物,使野生株(rt181 A)PCR产物中含有Blp Ⅰ酶切位点(5’GCTNAGC3’),而变异株(rt181V)无此限制性酶切位点．选取4份应用ADV治疗1 a以上出现HBV DNA反跳的临床耐药慢性乙型肝炎患者血清,经PCR扩增、Blp Ⅰ酶切、30 g／L琼脂糖凝胶电泳,进行限制性片段长度多态性(RFLP)分析．并选择经该方法鉴定的野生株及变异株各一例进行 HBV RT区基因序列分析及对照质粒的构建．结果:自4份血清标本中检测到2例rtA181V变异．所建立的ntPCR—RFLP方法灵敏度高,可以检测到103 copies／L的HBV DNA;特异性强,其 RFLP分析结果与DNA测序结果一致．结论:应用ntPCR-RFLP方法检测rtA181V 变异具有灵敏、特异、简便的优点,适用于 ADV耐药变异的临床监测工作．     

阿德福韦耐药乙型肝炎病毒株的快速检测和动态观察

目的设计PCR联合限制性片段长度多态性（PCR—RFLP）快速检测HBV阿德福韦耐药变异（rtN236T）的方法以及观察阿德福韦耐药毒株的动态变化情况。方法7例乙型肝炎患者在阿德福韦单药治疗过程中出现病毒突破或应答不完全。对其系列血清标本的HBVDNA逆转录酶部分区域进行直接或克隆后测序，设计和应用PCR—RFLP方法对rt236位点的变异情况进行检测。采用Hamming距离法计算HBV部分逆转录酶区域的基因多样性。结果l例患者出现rtA18IV变异，3例为rtN236T变异。建立了基于限制性内切酶DraI或HpaI的PCR—RFLP方法检测rtN236T变异：可以检测至少10％的弱势毒株，特异性为100％。在病毒突破前8个月可以检测到耐药毒株；该耐药毒株后来成为优势毒株。1例患者停用阿德福韦3个月后野生毒株取代耐药毒株重新成为优势株。1例患者在病毒突破后继续服用阿德福韦，rtN236T突变被一个新的突变株（rtN236V）替代。拉米夫定耐药患者的HBV逆转录酶有更明显的基因多样性。结论建立了PCR—RFLP快速检测rtN236T变异的方法；阿德福韦耐药毒株可以表现为不同的转化过程。     

HBV反转录酶区rtA181S变异与阿德福韦酯耐药相关性研究

目的：分析HBV反转录酶（RT）区rtA181S变异与阿德福韦酯（ADV）耐药的相关性。方法应用直接测序法筛选分析大样本慢性HBV感染者rtA181S变异的检出频率,并对1例接受ADV单药治疗失败的慢性乙型肝炎患者血清中HBV RT区基因进行克隆测序,分析相关变异形式。用XhoⅠ和SphⅠ双酶切pGEM-Teasy RT及pTriEx-HBV（C）载体后再连接,构建1.1倍HBV野生株和耐药株的重组质粒,转染人肝癌细胞系HepG2细胞,5 h后分别加入不同浓度的 ADV（0、0.033、0.100、0.330、1.000、3.300μmol/L）。隔天换药,4 d后收集细胞上清,采用实时荧光定量PCR法检测不同药物浓度作用下细胞培养上清中的HBV DNA载量,并分析其表型耐药特点。结果9830例慢性HBV感染者的12000个血清样本中,有46例样本检出rtA181S变异（单独或与其他耐药变异联合出现）,在653例中检出经典的rtN236T/A181V变异。其中随访的1例在接受ADV治疗19个月后出现了病毒学和生化学突破,直接测序检出rtA181S＋N236T变异,克隆测序分析显示在24个克隆中11个（45.83%）为野生型,6个（25.00%）为rtN236T变异型,5个（20.83%）为rtA181S变异型,1个（4.16%）为rtA181V变异型,1个（4.16%）为rtA181S＋N236T变异型。在体外实验中,rtN236T、rtA181S和rtA181S＋N236T变异株的相对复制力分别是野生株的91.35%、29.90%和68.53%。表型耐药分析显示rtN236T、rtA181S和rtA181S＋N236T变异株对ADV的灵敏性分别为野生株的1/4.41、1/3.05和1/5.43。结论 rtA181S是一种ADV耐药相关变异,可单独或联合其他变异引起患者耐药。但与经典ADV耐药变异相比,rtA181S变异引起的ADV耐药相对较弱,临床检出率较低。     

LAM耐药后ADV序贯治疗再耐药HBV变异株的动态变化

目的:观察阿德福韦酯(ADV)单药序贯治疗拉米夫定(LAM)耐药慢性乙型肝炎(CHB)出现再耐药患者HBV变异株的动态变化.方法:28例初始LAM治疗的CHB患者, 出现LAM耐药后换用ADV单药序贯治疗再次出现不充分病毒学应答或病毒学突破. 采用实时荧光定量PCR检测DNA, 分析HBV DNA动态变化; 采用直接PCR产物测序法检测耐药变异,分析变异模式变化. 对其中2例患者系列血清进行基因克隆分析其HBV耐药株动态变化.结果:28例入选患者HBV DNA载量随耐药变异株的消长而波动: 基线为(7.65±1.04)Log10copies/mL, LAM疗程中最低值中位数为3.68 Log10copies/mL; 出现病毒学突破或/和耐药变异时为(6.87±1.16) Log10copies/mL, 患者换用ADV后最低值中位数为3.78 Log10copies/mL; 患者出现耐药变异模式改变或再次病毒学突破时为(6.04±0.93) Log10copies/mL. 治疗基线及两次病毒突破3个时点HBV DNA载量均数逐渐下降, 且两两之间差异均有统计学意义. 28例患者LAM治疗后24例发生rtM204I/V伴或不伴rtL180M等变异, 4例无耐药变异; 换用ADV单药序贯治疗出现病毒学突破后, 进行测序检测耐药发现: LAM耐药变异13例(包括3例多重耐药), ADV耐药变异11例(包括3例多重耐药), 无耐药变异7例. 其中11例ADV耐药患者: rtA181V变异6例、rtA181T变异3例、rtN236T变异和rtA181V+rtN236T联合变异各1例. 对2例患者血清TA克隆发现ADV耐药准种出现和LAM耐药准种消失的过程, 同时发现对ADV耐药的rtI233M变异和对替诺福韦耐药的rtA194T变异.结论:ADV单药序贯治疗LAM耐药CHB出现再耐药患者HBV变异株动态变化存在5种形式, 且克隆分析可观察耐药株动态变化过程和发现预存的耐药准种.     

ADV初治耐药与LAM耐药者再耐药时HBV-RT区的变异特征

目的:研究阿德福韦酯(adefovir,ADV)初治耐药和ADV用于挽救治疗拉米夫定(lamivudine,LAM)耐药者再耐药时HBV毒株RT区变异特征的差异性.方法:我院就诊的ADV初治耐药者73例,ADV用于挽救治疗LAM耐药者后再耐药者34例,共计107例,在HBVDNA突破时采用PCR方法扩增HBV-RT区基因,对PCR产物直接测序,用Chromas2.0软件分析HBV-RT区基因的核苷酸和氨基酸差异、变异模式,同时使用Clustalx1.81.msw进行基因型分析.结果:在107例患者中,存在rtA181V变异36例,rtA181T变异43例,rtN236T变异47例,rtM204I/V±rtL180M变异20例,其他相关变异如rtA181S/C、rtH/N238S/T/R/A/K、rtV214I/A、rtQ215H共12例.ADV初治组检测到rtA181V/T变异27例(36.99%)、rtN236T变异14例(19.18%)、rtA181V/T+rtN236T变异28例(38.36%),rtA181T/V和rtN236T以外的变异4例(5.48%).其中发生rtA181V和rtA181T变异患者分别有33.3%、64.5%合并rtN236T变异(P=0.0091);ADV挽救治疗LAM耐药者再耐药,检测到rtA181V/T变异21例(61.76%)、rtN236T变异2例(5.88%)、rtA181V/T+rtN236T变异3例(8.82%),rtA181T/V和rtN236T以外的变异8例(23.53%).其中发生rtA181V患者25%合并rtN236T变异,而rtA181T变异患者未检测到rtN236T变异(P=0.2311).20例(58.83%)患者合并rtM204I/V变异,这20例患者中12例(35.29%)合并rtA181V/T和/或rtN236T变异的多重耐药变异.有12例未检测到rtA181T/V和rtN236T变异,但检查到rtA181S/C(2例)、rtV214I/A(3例)、rtQ215H(1例)、rtH/N238S/T/R/A/K(6例)等ADV耐药相关变异,其中ADV挽救治疗LAM耐药患者8例,ADV初治患者4例,两组间存在统计学差异(P=0.0169).结论:ADV初治耐药主要发生rtA181V/T和rtN236T变异,ADV挽救治疗LAM耐药再耐药主要发生rtA181V/T变异,且后者耐药模式更复杂.     

乙型肝炎病毒rtN238H变异与阿德福韦酯耐药的相关性研究

目的阐明乙型肝炎病毒（HBV）多聚酶/逆转录酶区rtN238H变异对临床产生阿德福韦（ADV）耐药的影响。方法分析了1789例慢性乙型肝炎患者rtN238H变异的发生频率及其与ADV用药的关系;从典型病例患者血清中克隆获得HBV rtN238H变异株并通过回复定点突变获得对应的野生株,分别构建pTriEx-HBV1.1重组表达载体,瞬时转染HepG2细胞。给予转染细胞不同浓度ADV处理,用DNase消化游离DNA后,对上清中成熟病毒颗粒中的HBV DNA进行裂解定量以评价病毒的复制力。结果在1789例乙型肝炎患者中rtN238H变异为181例（10.1%）,其中HBV B基因型感染为151例（83.4%）,C基因型感染为30例（16.6%）;ADV经治和未治患者分别为130例（71.8.%）和51例（28.2%）,其中对ADV治疗产生临床应答（含部分应答）的占82.3%（107/130）,无应答或出现病毒学反跳的占17.7%（23/130）,但与野生株相比,rtN238H变异株对ADV的敏感性和病毒复制力无明显的改变。结论 rtN238H是HBV自然发生的多态性变异,对ADV敏感性和复制力无直接的影响。     

乙肝患者阿德福韦酯耐药位点自然变异的相关因素分析

目的 分析未经阿德福韦酯（ADV）治疗的乙型肝炎患者乙型肝炎病毒（HBV） DNA聚合酶区ADV主要相关耐药位点发生自然变异的影响因素.方法 提取307例未经ADV治疗的乙型肝炎患者的血清,采用焦磷酸测序法检测HBV DNA基因突变情况,并同时检测HBV DNA、ALT、AST、HBeAg.结果 按是否发生ADV主要相关耐药位点自然变异分为变异组（n=6）和未变异组（n =301）,其中rtN236T变异4例,rtA181V/T变异2例,单因素分析比较可能与自然变异相关的因素,结果两组年龄、是否有肝硬化和是否饮酒差异有统计学意义（P均＜0.05）.将年龄、是否有肝硬化、饮酒代入Logistic回归方程,合并肝硬化和饮酒是ADV自然变异的独立危险因素（P=0.033,P=0.049）.结论 未经ADV治疗的乙型肝炎患者存在ADV主要相关耐药位点自然变异,自然变异受合并肝硬化、饮酒的影响.     

乙型肝炎病毒阿德福韦酯耐药相关变异的研究进展

目前口服核苷酸类似物阿德福韦酯(adefovir dipivoxil,ADV)仍是我国临床治疗慢性乙型肝炎(chronic hepatitis B,CHB)的主要抗病毒药物之一。但是,长期服用ADV可能导致乙型肝炎病毒(hepatitis B virus,HBV)产生耐药变异。经典的ADV耐药变异形式为rt A181V和rt N236T,新鉴定的ADV原发耐药变异为rt A181S、rt E218G和rt N236V。此外,rt A181T、rt V214A、rt Q215H/P/S、rt L217R/P、rt I233V和rt N238T/D/H等位点变异与HBV对ADV耐药仍存在争议,尚需进一步明确。     

阿德福韦耐药乙型肝炎病毒毒株生物学特性的研究

目的 体外研究阿德福韦(ADV)耐药相关变异对于HBsAg产生及HBV复制等生物学特性的影响.方法 收集12例在ADV治疗过程中出现病毒学突破的慢性乙型肝炎患者血清,对其HBV反转录(RT)区进行PCR扩增和测序分析.对其中4例患者的HBV进行全基因扩增、测序、序列分析及克隆.将优势株的HBV全基因插入PHY106载体,构建成1.1拷贝HBV基因组表达载体,进而转染Huh7细胞,ELISA法检测细胞培养上清液中HBsAg及HBeAg水平,了解不同ADV耐药相关变异类型对HBsAg分泌的影响.抽提转染细胞内病毒核心颗粒HBV DNA,实时荧光定量PCR方法 检测HBV DNA水平.将rtA181T/sW172*变异株与rtA181非变异株质粒按不同比例混合,共转染Huh7细胞,检测上清液中HBsAg及细胞内病毒核心颗粒HBV DNA水平.结果在12例出现病毒学突破的患者中,10例出现ADV耐药相关位点变异,以rtA181变异为主,其中5例有rtA181T变异,4例为rtA181T/S+rtN236T变异.将含rtA181T/sW172*变异的质粒转染细胞后,上清液中不能检测到HBsAg,而含其他变异类型的质粒转染细胞后,上清液中HBsAg和细胞内病毒核心颗粒HBV DNA水平与非变异株相似;含不同变异的HBV临床分离株转染后的细胞内核心病毒颗粒HBV DNA水平未见明显差异.将rtA181T/sw172*变异株及rtA181非变异株的质粒共转染后.随着rtA181非变异株比例的增加,上清液中HBsAg水平也逐渐增高,但细胞内核心病毒颗粒HBV DNA水平无明显差异.结论 rtA181变异是ADV耐药相关性变异的主要类型,rtA181T变异较多见.rtA181T/sW172*变异株可引起HBsAg分泌障碍,但rtA181非变异株可纠正rtA181T/sW172*变异株的HBsAg分泌障碍.不同类型的ADV耐药相关变异对HBV的复制能力无显著影响.     

Resistance to adefovir dipivoxil therapy associated with the selection of a novel mutation in the HBV polymerase

BACKGROUND & AIMS: Adefovir dipivoxil effectively inhibits both hepatitis B virus (HBV) replication and disease activity in patients with chronic hepatitis B. Resistance to treatment was not observed in 2 recent large placebo-controlled 48-week studies with this drug. The aim of this study was to characterize adefovir resistance in a patient who developed clinical and virologic evidence of breakthrough during a 96-week course of treatment. METHODS: HBV DNA was PCR amplified and sequenced. Phenotypic studies used patient-derived HBV as well as specific mutations created by site-directed mutagenesis of a HBV/baculovirus recombinant. RESULTS: Following the commencement of treatment with adefovir dipivoxil, the patient initially responded with a 2.4 log(10) decrease in serum HBV DNA and normalization of alanine aminotransaminase levels by week 16. During the second year of treatment, however, serum HBV DNA rose progressively, eventually returning to near-pretreatment levels. This increase in viral replication was associated with a marked increase in alanine aminotransferase and mild changes in bilirubin, albumin, and prothrombin time. Comparison of pretreatment and posttreatment HBV DNA by polymerase chain reaction sequencing identified a novel asparagine to threonine mutation at residue rt236 in domain D of the HBV polymerase. In vitro testing of a laboratory strain encoding the rtN236T mutation and testing of patient-derived virus confirmed that the rtN236T substitution caused a marked reduction in susceptibility to adefovir. CONCLUSIONS: The development of this novel mutation in the HBV polymerase confers resistance to adefovir dipivoxil. The patient responded to subsequent lamivudine therapy, achieving normalization of alanine aminotransferase and a significant decrease in serum HBV DNA.     

Establishment of a new quantitative detection approach to adefovir-resistant HBV and its clinical application

AIM:To establish the more feasible and sensitive assessment approach to the detection of adefovir (ADV) resistance-associated hepatitis B virus (HBV) quasispecies.METHODS: Based on the characteristics of rtA181V/T and rtN236T mutations, a new approach based on real-time fluorescent quantitative polymerase chain reaction (RT-PCR) was established for the detection of ADV-resistant HBV quasispecies, total HBV DNA, rtA181 and rtN236 mutations in blood samples from 32 chronic hepatitis B (CHB) patients with unsa...     

Hepatitis B virus wild‐type and rtN236T populations show similar early HBV DNA decline in adefovir refractory patients on a tenofovir‐based regimen

Summary. Hepatitis B virus (HBV) pol/RT mutations that confer clinical resistance to tenofovir disoproxil fumarate (TDF) have not been detected to date. In vitro, the rtN236T adefovir dipivoxil (ADV)‐associated resistance mutation confers low‐level cross‐resistance to tenofovir: 3‐ to 13‐fold changes in EC₅₀ from wild type. This study evaluated the clinical response of rtN236T mutant viruses by comparing their early viral load decay kinetics to wild‐type viruses in chronic HBV monoinfected patients harbouring rtN236T prior to initiating TDF or emtricitabine (FTC)/TDF therapy. Baseline samples (n = 105) from adefovir refractory patients were tested for the presence of rtN236T using a highly sensitive allele‐specific PCR assay with an rtN236T detection cut‐off of 0.5%. The rtN236T mutation was detected at baseline in 14.3% (14/98) of analysable patient samples (0.5–93.2%, rtN236T percentage range). The median change in total HBV DNA at week 24 was comparable for patients with rtN236T detected at baseline (?3.7 log₁₀ copies/mL, n = 14) as compared to patients with wild‐type HBV (?3.2 log₁₀ copies/mL, n = 90). In patients with rtN236T, wild‐type and rtN236T mutant virus showed similar rates of HBV DNA decline with no statistically significant difference observed at week 4. Moreover, the proportion of rtN236T remained unchanged in patients in either arm of the study during treatment. In conclusion, the rtN236T mutant virus showed similar HBV DNA decline kinetics to wild‐type virus in adefovir refractory patients who switched to TDF or FTC/TDF. Despite low levels of cross‐resistance in vitro, TDF similarly suppresses wild‐type and rtN236T mutant viruses in vivo.     

乙型肝炎病毒YMDD变异的治疗对策

目的 探讨慢性乙型肝炎患者发生YMDD病毒变异后的治疗策略. 方法 2005年6月-2007年6月在门诊和住院的经拉米夫定治疗后出现YMDD变异的慢性乙型肝炎患者120例,随机分为4组,A组单用阿德福韦酯10 mg/d,治疗48周;B组采用阿德福韦酯10 mg/d,拉米夫定100 mg/d,联合治疗12周,后单用阿德福韦酯10mg/d治疗36周;C组采用阿德福韦酯10mg/d、拉米夫定100mg/d,联合治疗48周;D组接受恩替卡书1 mg/d,治疗48周.根据资料不同,分别采用方差分析、q检验和χ2检验.结果 4组患者治疗12周内ALT水平进一步反弹升高的患者比例分别为30.0%(9/30)、10.0%(3/30)、6.7%(2/30)、10.0%(3/30)(A组与B组、D组间比较χ2=3.750,P=0.053;A组与C组比较χ2=5.455,P<0.05).A组1例患者出现重型肝炎;治疗12周时4组患者YMDD变异株检测阳性率分别为17.2%、0、0、0;治疗48周时4组患者间ALT水平、HBeAg阳性患者血清转换率比较,差异均无统计学意义.C组、D组患者ALT复常率、HBVDNA达到检测水平以下的百分率与A组患者比较,χ2值分别为7.131、5.516、5.260、6.748,P值均<0.05,差异有统计学意义.4组患者的基因型耐药率分别为6.9%(2/29)、6.7%(2/30)、0、0,A组2例耐药患者测序为rtN236T变异,B组rtA181V和rtN236T变异各1例.结论 YMDD变异后采用阿德福韦酯与拉米夫定联合治疗或恩替卡韦治疗更安全有效.     

阿德福韦酯治疗慢性乙型肝炎的耐药性分析

目的 探讨阿德福韦酯治疗慢性乙型肝炎耐药性产生的原因.方法 从阿德福韦酯Ⅲ期临床试验中筛选出30例原发治疗失败或继发耐药患者,应用巢式逆转录聚合酶链反应扩增HBVRT区,比对RT区核苷酸及氨基酸序列,找出变异位点.结果 30株阿德福韦酯治疗失败者中有21株HBV表现出原发性耐药,其中5株具有多态性位点rtN118H(23.8%,5/21).另外9株发生继发性耐药,继发耐药毒株在RT保守区(C结构域rtM207V)和非保守区多个区域均有变异.没有发现典型的nN236T和rtA181V/T突变.结论 多态性位点rtN118H与阿德福韦酯原发耐药可能有关.HBV RT C结构域rtM207V变异及其他处于非保守区的变异可能与HBV继发性耐药有关,天然耐药准种的存在可能是HBV对阿德福韦酯迅速耐药(继发性)的基础.上述结论 有待进一步表型验证实验加以证实.     

Pooled analysis of amino acid changes in the HBV polymerase in patients from four major adefovir dipivoxil clinical trials

BACKGROUND/AIMS: The rtA181V and rtN236T mutations have been associated with resistance to adefovir dipivoxil (ADV). Recent reports have proposed other ADV resistance (ADV-R) mutations. The aims of this study were to confirm the role of rtA181V and rtN236T in clinical resistance to ADV and to screen for other potential ADV-R mutations. METHODS: Patients from ADV studies (n=998) were screened for viral breakthrough and/or insufficient HBV DNA suppression after at least 48 weeks of ADV therapy [virologic failure, VF]. McNemar's exact test was used to test for differences in the proportion of patients with switches from consensus amino acid (AA) at baseline to non-consensus AA at VF and vice versa. RESULTS: Data obtained from 172 paired HBV polymerase sequences demonstrated that only positions rt181 and rt236 had significantly more changes among patients with VF after adjusting for multiple comparisons (p<0.0005). When tested separately, the mutations rtA181V and rtN236T were statistically significant (p<0.0005); no other AA position was associated with VF. Patients who had HBV DNA breakthrough were more likely to develop ADV-R mutations than patients with insufficient HBV DNA suppression (36% vs. 5%). CONCLUSIONS: rtA181V and rtN236T were the only HBV polymerase mutations significantly associated with virologic failure to adefovir dipivoxil.     

唐山地区乙肝患者HBsAg滴度、HBV DNA水平与乙肝基因突变位点的关系研究

目的:研究唐山地区乙型肝炎(乙肝)患者乙肝表面抗原(HBsAg)滴度、乙肝病毒基因(HBV DNA)水平与乙肝基因突变位点的关系。方法:选择2018年1月—2020年12月唐山地区150例乙肝患者作为研究对象,测定HBsAg滴度和血清HBV DNA水平,通过基因测序分析突变情况,并据此分为突变组与未突变组,比较不同基因突变位点患者的HBsAg滴度、HBV DNA水平,使用线性回归分析唐山地区乙肝患者HBsAg滴度、HBV DNA水平与乙肝基因突变位点的关系。结果:本研究150例乙肝患者中,有62例患者发生了基因突变,基因突变发生率为41.33%(62/150)。其中,rtM204I/V位点基因突变占比最高,为27.42%(17/62),rtL180M次之,为22.58%(14/62);rtL180M+rtM204I/V、rtA181T+rtN236T基因突变患者HBsAg滴度、HBV DNA水平高于rtM204I/V、rtL180M、rtN236T基因突变患者,差异有统计学意义(P<0.05);经Pearson相关性分析结果显示,基因突变乙肝患者HBsAg滴度、HBV DNA水平...