DNA疫苗诱导健康小鼠细胞免疫及HBV转基因小鼠抗-HBs产生

目的 :在HBVDNA疫苗成功地诱导健康小鼠体液免疫应答的基础上 ,探讨其作为抗 HBV治疗的可行性及作用机理。方法 :应用基因重组技术 ,构建编码HBV中蛋白 (preS2 +S)及人白细胞介素融合蛋白基因的真核表达质粒pS2 .S及pFP ,继经肌注免疫健康Balb C及HBV转基因 (Tg)小鼠并观察健康小鼠细胞免疫应答及HBVTg小鼠HBsAg的血清转换。结果 :1 体外HBsAg对DNA疫苗免疫后的T细胞的刺激呈浓度相关 ,HBsAg 30 μg ml时刺激pS2 .S免疫小鼠脾细胞增殖指数(5 6± 0 9)明显较pcDNA3 1组 (2 0± 0 5 )高。细胞培养上清液细胞因子水平检测结果 :免疫实验组IL 2及IFN γ的分泌水平明显较对照组高 ,而IL 4水平于各组影响不明显。 2 pS2 .S免疫小鼠局部引流淋巴结DCs诱导HBsAg致敏的T 细胞增殖指数(4 2 0 )较pcDNA3.1组 (2 5 5高 )。 3 高剂量的pS2 .S组与联合pFP组各有一只Tg小鼠分别于 2、4w开始发生HBsAg血清转换 ,且其抗体水平随时间而增长。结论 :结果表明HBVDNA疫苗能有效诱导HBsAg特异性的细胞免疫应答 ;HBV Tg小鼠初步实验结果为治疗型HBVDNA疫苗的深入研制提供了实验依据。     

二氢杨梅素联合丝裂霉素对胃癌细胞的生长抑制作用

目的: 探讨二氢杨梅素(AMP)联合细胞化疗药物丝裂霉素(MMC)对胃癌细胞SGC-7901的抑制作用。方法: 体外培养人胃癌细胞株SGC-7901,分别设空白对照组、AMP组、MMC组以及AMP+MMC组。用MTT法观察细胞生长;流式细胞术分析细胞凋亡率;Western blotting检测细胞Bcl-2及survivin的表达情况。结果: 在AMP组中,当浓度在2.2 mg/L-14.84 mg/L时,AMP对胃癌细胞生长均有抑制作用,以14.84 mg/L抑制作用最明显(60.85%±1.13%,P<0.05)。MMC随着浓度由1×10^-3g/L增加至1×10g/L,其抑制率也由17.40%±0.30%增加至72.23%±1.36%,呈递增趋势。AMP联合MMC的抑制作用随着MMC浓度由1×10^-3 g/L增加至5×10^-3g/L,抑制率也由21.83%±2.50%增加至46.70%±1.45%。联合治疗组优于单独给药组。AMP、MMC及AMP+MMC均可以下调Bcl-2及survivin的表达,其中AMP+MMC组下调作用最明显。结论: AMP联合MMC可以增强对胃癌细胞的抑制作用,联合应用可以减低MMC的剂量;其抑制肿瘤作用可能与下调Bcl-2及survivin蛋白的表达有关。     

HBV抗原定量对干扰素联合阿德福韦酯治疗HBeAg阳性慢乙肝的疗效预测

目的了解HBV抗原定量（HBsAg水平）对聚乙二醇干扰素α-2a序贯联合阿德福韦酯（ADV）治疗HBeAg阳性慢性乙肝患者48周疗效的预测。方法62例HBeAg阳性慢性乙肝患者应用聚乙二醇干扰素α-2a治疗24周时,根据疗效进行分组,若HBVDNA≤100IU／ml,定为A组。继续单药治疗至48周;若HBVDNA〉100IU／ml,定为B组,加用ADV治疗至48周。B组患者联合治疗至48周时,若HBVDNA≤100IU／ml,定为Bl组,若HBVDNA〉100IU／ml,定为B2组。疗效评价指标：HBVDNA显著抑制（HBVDNA≤100IU／m1）。治疗过程中监测患者ALT、TBIL、HBVDNA及HBsAg、HBeAg水平,采用SPSSl6．0进行统计学分析。结果基线水平三组患者平均年龄、性别分布、ALT水平差异均无统计学意义（P〉0．05）。A组与B1、B2组患者基线HBVDNA、HBsAg、HBeAg水平差异有统计学意义（P〈0．05）。BI、B2组比较,12周、24周HBsAg下降水平的差异均有统计学意义（P〈0．05）,而HBeAg下降水平的差异无统计学意义（P〉0．05）。结论聚乙二醇干扰素α-2a治疗24周HBVDNA仍高于lOOIU／ml的慢性乙肝患者,12周、24周HBsAg下降水平可以预测加用ADV治疗至48周的疗效。     

羧甲基茯苓多糖对HBV转染细胞表达功能影响的实验研究

目的研究羧甲基茯苓多糖在2.2.15细胞株培养中抗乙型肝炎病毒(HBV)的作用。方法分别采用20.0、12.0、6.0、3.0、1.5g/L的药液,在2.2.15细胞株培养中观察其对细胞的毒性和对HBsAg和HBeAg分泌的抑制效果。结果羧甲基茯苓多糖对2.2.15细胞株的50%毒性浓度(TC50)为13.6g/L,对2.2.15细胞株HBsAg、HBeAg分泌的半数有效浓度(IC50)为4.45、5.61g/L,治疗指数(TI)值为3.06和2.42,高于已用于临床抗病毒的阿昔洛韦。结论羧甲基茯苓多糖在2.2.15细胞株培养中对HBsAg和HBeAg分泌有较好的抑制作用。     

拉米夫定耐药的慢性乙肝患者联合干扰素或苦参素治疗疗效观察

目的 观察拉米夫定耐药的慢性乙型肝炎患者联合干扰素或苦参素治疗的效果。方法 40例患者在继续应用拉米夫定的前提下，A组14例联合应用干扰素a-2b3MU IM每日1次，30d，然后隔日1次，共计6个月。B组15例联合苦参素，苦参素60mg，IM每日1次，3个月，然后改为口服0．2g每日3次3个月。C组11例继续单用拉米夫定100mg每日1次口服。疗程结束后，观察乙肝病毒血清学指标HBVDNA、HBeAg阴转及HBeAg／anti-HBe转换，肝功能(ALT)恢复情况。结果 联合干扰素治疗组，HBVDNA阴转率为35．71％(5／14)；联合苦参素治疗组HBVDNA阴转率为13．33％(2，15)，ALT复常率分别为85．71％(12／14)、86．67％(13／15)。C组无HBVDNA及HBeAg阴转，ALT复常率为36．36％(4／11)。结论 对拉米夫定耐药的慢性乙型肝炎患者，联合干扰素或苦参素治疗后，可以提高拉米夫定疗效，抑制病毒复制，促进肝功能恢复。     

中药单方乙醇提取液抗乙肝病毒的实验研究

目的 观察中药单方乙醇提取液在2215细胞的体外培养中,对细胞的毒性和对分泌HBeAg和HBsAg的抑制作用.方法 通过药物对2215细胞进行毒性实验,在最佳药物浓度下,测定HBsAg和HBeAg水平.结果 根据半数有毒浓度(TC50);最大无毒浓度(TC0);抗原抑制百分率;治疗指数(SI)来判断出毒性较低但是对抑制乙肝病毒有效的药物.结论 根据实验结果推断出毒性较低但是对抑制乙肝病毒有效的药物如秦艽,地骨皮等.     

复制缺损型HBV表达显性阴性突变体抗HBV作用的研究

目的　探索HBV作为基因治疗载体的可能性及检验HBV点突变表达显性阴性突变体抗HBV的作用。方法　在表达完整HBV颗粒的质粒上 ,经基因修饰后分别表达核心 P蛋白及核心 表面抗原的融合蛋白 ,整合于具有HBV复制的 2 2 15细胞 ,形成细胞克隆 ,ELISA法检测细胞培养上清液中HBsAg和HBeAg ,斑点杂交法检测细胞内HBV核壳中HBVDNA ,PCR检测上清液中重组HBV颗粒。结果　 2 2 15 pMEP4组、2 2 15 CP组、2 2 15 CS组 ,对HBsAg平均抑制率分别为 2 74 %±3 83%、4 0 0 8%± 2 0 5 % (P <0 0 1)和 5 2 94 %± 1 93% (P <0 0 1) ;对HBeAg平均抑制率分别为4 4 6 %± 4 2 5 %、5 2 86 %± 1 32 % (P <0 0 1)和 4 1 6 0 %± 1 6 5 % (P <0 0 1) ;对HBV复制的抑制率分别为 15 3%、82 0 %和 6 7 2 %。仅在 2 2 15 CP组培养上清液中能检测出突变型HBV颗粒。结论　在细胞内表达显性阴性突变体具有干扰HBV复制及抑制HBV抗原表达的作用 ;经修饰后的HBV基因组在野生型HBV辅助下 ,仍能包装并分泌完整的HBV样颗粒。     

murM基因变异与肺炎链球菌青霉素高度耐药及头孢曲松耐药的相关性

目的　研究肺炎链球菌murM基因变异与青霉素及头孢曲松耐药的相关性。方法　应用PCR技术扩增肺炎链球菌murM基因并进行基因测序。选取肺炎链球菌株 5 5株 ,包括青霉素敏感株 10株 (MIC≤ 0 .0 6 μg/ml) ;青霉素耐药株 4 5株 ,其中低水平耐药 10株 (MIC 0 .12～ 1μg /ml) ,高水平耐药 35株 (MIC≥ 2 μg/ml) ,在青霉素高水平耐药菌株中 ,对头孢曲松耐药 13株 (MIC≥ 2 μg/ml)。用敏感株R36AmurM基因序列作为比较标准。结果　 5 5株肺炎链球菌murM基因PCR产物测序结果 ,16株murM基因发生显著变异 (变异率≥ 3% ) ,1株青霉素MIC 3μg/ml、头孢曲松MIC 2 μg/ml的菌株 ,其murM基因变异率 3.4 % ;15株青霉素MIC≥ 8μg/ml或头孢曲松MIC≥ 2 μg/ml的菌株 ,murM基因变异率达 10 % ,呈嵌合式变异。murM基因变异与肺炎链球菌青霉素及头孢曲松MIC显著相关 (χ2 =36 .5 32 ,P <0 .0 1;χ2 =37.116 ,P <0 .0 1)。结论　肺炎链球菌murM基因变异与青霉素高度耐药 (MIC≥8μg/ml)及头孢曲松耐药 (MIC≥ 2 μg/ml)有显著的相关性。     

慢性乙型肝炎患者血清HBVDNA含量和IL-12对其PBMC产生Th1/Th2类细胞因子影响的相关性研究

目的：研究慢性乙型肝炎患者血清HBVDNA含量对IL－12诱导其PBMC产生Th1/Th2类细胞因子协同效应的影响。方法：分离50例慢性乙型肝炎患者外周血单个核细胞，分别与PHA（100μg/ml）、HBcAg（1μg/ml）、HBeAg（1μg/ml）单独或联合IL－12（10ng/ml）体外培养48h，ELISA法检测培养上清液细胞因子IL－2、IFN－γ、IL－10。荧光定量PCR检测患者血清DNA含量，并分成HBVBDNA小于10^3拷贝／ml、1063-10^5拷贝／ml、1065-10^7拷贝／ml、大于10^7拷贝/ml4组。结果：以HBVDAN小于10^3拷贝／ml组做对照组，比较发现无论抗原（PHA、HBcAg、HBeAg）单独诱导还是联合IL－12共同诱导，随着血清HBVDNA含量的增高，PBMC产生IL－2和IFN-γ水平逐渐降低，产生IL－5和IL－10水平逐渐升高，并且IL－12对PBMC产生IFN－γ的增殖效应逐渐减弱，特别是血清HBVDNA大于10^7拷贝／ml患者几乎无明显增殖效应。结论：高水平血清HBVDNA含量对IL－12诱导慢性乙型肝炎PBMC产生IFN－γ协同效应有抑制作用。     

不同剂量乙肝疫苗与HBIG联合免疫阻断HBV母婴传播的效果对比

目的 探讨10 μg和20 μg乙肝疫苗与HBIG联合免疫阻断HBV母婴传播的效果.方法 124例HBsAg阳性孕妇所生的婴儿随机分为两组,即10 μg乙肝疫苗组和20 μg乙肝疫苗组.婴儿于出生6h内及30 d分别注射200 IU HBIG,同时分别于出生24 h内、1个月及6个月注射3次10 μg或20 μg重组酵母乙肝疫苗.检测婴儿出生时以及1岁时血清HBV标志物.结果 两组新生儿血清HBsAg、HBeAg及抗-HBe阳性率与滴度之间差别均无统计学意义（P＞0.05）.所有新生儿血清HBV DNA水平均小于检测下限（500 U/ml）.出生12个月时,所有124例婴儿血清HBsAg和HBeAg检测结果均为阴性;血清HBV DNA水平均在检测下限以下;10 μg和20 μg乙肝疫苗组血清抗-HBs阳性率分别为90.3％和96.8％,差异无统计学意义（P＞0.05）;抗-HBs水平分别为325.5±342.2 mIU/ml和463.7±353.3 mIU/ml,后者显著高于前者（P=0.01）.而且,20 μg乙肝疫苗组产生高应答抗-HBs（＞ 100 mIU/ml）的比例显著高于10μg乙肝疫苗组（P =0.035）.结论 20 μg乙肝疫苗联合HBIG方案阻断HBV母婴传播的效果优于10 μg乙肝疫苗联合HBIG方案.     

受体导向药物L—HSA—Ara—AMP对乙型肝炎病毒抑制作？…

目的 为初步试探受体导向药物Ｌ－ＨＳＡ－Ａｒａ－ＡＭＰ的抗病毒效果。方法 应用５天疗法治疗慢性乙型肝炎１０例，并以Ａｒａ－ＡＭＰ为对照。结果 治疗组ＨＢｓＡｇ无变化，１０例ＨＢｓＡｇ阳性者阴转３例，滴度下降６例，４例抗－ＨＢｃ ＩｇＭ阳性均转阴，８例ＨＢＶ ＤＮＡ阳性阴转４例，浓度下降４例，未发现任何毒副反应。结论 显示该药对ＨＢＶ复制指标的近期抑制效果与Ａｒａ－ＡＭＰ相近或略优，但日剂量仅为后者     

乙型肝炎病毒 C 基因启动子基因变异与免疫学标志及DNA含量的临床研究

目的 研究乙型肝炎病毒（HBV）C基因启动子（Basic core promoter,BCP）基因变异与HBV感染者免疫学标志及HBV DNA含量的临床关系。方法 采用聚合酶链（PCR）微板核酸分子杂交及荧光定量PCR检测技术,对246例HBV感染者进行HBV BCP基因变异及HBV DNA含量测定。结果 在HBsAg/HBeAg/HBcAB,HBsAg/HBeAg/HBcAb及HBsAg/HBcAb阳性的HBV感染者中,HBV DNA的阳性率分别为97.5%(48/49),22.9%(25/109),31.1%(14/45);HBV BCP基因变异率分别为59.1%(29/49),11%(12/109),13.3%(6/45);HBV BCP基因变异组DNA含量均≥10^6cps/ml,明显高于非BCP基因变异组。肝硬化病人BCP基因变异明显高于其他组。结论 e抗原免疫学标志的转换仅对部分感染者预示着病毒的免疫清除和静息,单独依靠乙型肝炎免疫学标志并不能确切提示HBV的复制状态、病变程度及愈后。     

Serum HBsAg, HBeAg, anti-HBe, and hepatitis B viral DNA in asymptomatic carriers in Taiwan

Plasma samples from 89 asymptomatic hepatitis B surface antigen (HBsAg) positive volunteer blood donors were titrated for HBsAg by radioimmunoassay using the parallel line method. HBsAg titers ranged widely from 0.01 to 325 micrograms/ml. The titers correlated well with hepatitis B viral DNA (HBV DNA) and hepatitis B e antigen (HBeAg) in the serum. The HBsAg titers in 55 HBV DNA positive carriers were 90.7 +/- 61.7 micrograms/ml (Mean +/- SD) vs. 6.3 +/- 12.2 micrograms/ml in the 34 carriers without HBV DNA in the serum. The titers were 93.9 +/- 59.1 micrograms/ml in 56 carriers with HBeAg, 6.4 +/- 10.1 micrograms/ml in 24 anti-HBe-positive carriers, and 4.9 +/- 4.6 micrograms/ml in 9 HBeAg/anti-HBe-negative carriers. 50 (89.3%) of the 56 HBeAg-positive carriers had HBV DNA, in contrast to four (16.7%) of 24 anti-HBe-positive carriers. The study indicated that high-titered HBsAg carriers were much more likely to be infectious, and confirmed that HBeAg is a practical marker of infectivity. Absence of HBeAg, however, did not exclude infectivity in asymptomatic HBsAg carriers, inasmuch as one-sixth of the carriers had HBV DNA.     

Quantitative detection of hepatitis B surface antigen by chemiluminescent microparticle immunoassay during lamivudine treatment of chronic hepatitis B virus carriers

The usefulness of fully automated chemiluminescent microparticle immunoassay (Architect HBsAg QT) for monitoring serum levels of hepatitis B virus (HBV) during antiviral therapy remains unclear. Using this assay, hepatitis B surface antigen (HBsAg) was measured in 20 patients with chronic hepatitis B before and during lamivudine treatment. At the start of therapy, 12 patients had detectable hepatitis B e antigen (HBeAg) and 8 did not. The median serum HBV DNA level and HBsAg concentration (25th-75th centile) were 7.2 (6.1-7.8) log genome equivalents/ml and 3,932 (1,585-12,330) IU/ml, respectively. The HBsAg concentration was significantly higher in HBeAg positive than in HBeAg negative patients (P=0.031). There was a significant correlation between the HBsAg concentration and HBV DNA level (r=0.490, P=0.027). The HBsAg concentration negatively correlated with patient age (r=-0.395, P=0.085). After the start of lamivudine therapy, HBV DNA levels fell rapidly in all patients. Serum HBsAg concentrations also fell in most patients, but to a lesser extent. When drug-resistant variants emerged, serum HBsAg usually increased before biochemical breakthrough. Although HBV DNA was elevated persistently after the emergence of drug-resistant variants, the increase in HBsAg was transient. In some patients, the increase in HBsAg preceded the increase in HBV DNA. Monitoring of serum HBsAg concentrations with the use of Architect HBsAg QT, in addition to measurement of HBV DNA levels, is helpful for evaluating the response to lamivudine treatment and for the early detection of drug-resistant strains.     

Correlation of serum hepatitis B surface antigen level with response to entecavir in naïve patients with chronic hepatitis B

Recent studies have suggested that quantifying the serum HBsAg levels can predict the response to pegylated interferon. We aimed to determine the change in serum HBsAg levels during entecavir (ETV) treatment and the correlation with treatment response in chronic HBeAg‐positive and HBeAg‐negative hepatitis B patients. Serial HBsAg levels were measured using the Architect assay (Abbott Laboratories, Abbott Park, IL) in sera from 101 treatment‐naive chronic hepatitis B (CHB) patients receiving ETV. During treatment, in HBeAg‐positive patients, the mean HBsAg level was 3.51, 3.22, 3.34, 3.36, and 3.40 log₁₀ IU/ml at baseline, 3, 6, 12, and 24 months, respectively, and there was no significant change compared with the baseline level, except the decline at 3 months (P = 0.009). In HBeAg‐negative patients, the mean level of serum HBsAg showed increase with 3.06, 3.09, 3.20, 3.26, and 3.27 log₁₀ IU/ml at baseline, 3, 6, 12, and 24 months of treatment, respectively. In HBeAg‐positive patients, HBV‐DNA negativity (<2,000 copies/ml; P = 0.010) and HBsAg level <3,000 IU/ml (P = 0.026) at 3 months were independent predictors of HBeAg loss/seroconversion at 12 months. After 24 months of treatment, the HBsAg levels at baseline (P = 0.046) was an independent factor of HBeAg loss/seroconversion. In HBeAg‐negative patients, undetectable HBV DNA at 6 months was an independent factor predicting undetectable HBV DNA after 12 months of therapy. The level of serum HBsAg before and during therapy was a good predictor of HBeAg loss/seroconversion in naïve HBeAg‐positive CHB patients receiving entecavir. J. Med. Virol. 83:1178–1186, 2011. © 2011 Wiley‐Liss, Inc.     

拉米夫定与泛昔洛韦联合治疗乙型肝炎病毒慢性感染的临床研究

目的 观察拉米夫定与泛昔洛韦联合治疗乙型肝炎病毒(HBV)慢性感染的临床疗效。方法 慢性乙型肝炎患者90例。设联合治疗组28例，单用拉米夫定组30例，单用泛昔洛韦组32例。联合治疗组给予口服拉米夫定0．1g／d(PO)，泛昔洛韦1．5g／d(PO)，24周。拉米夫定、泛昔洛韦单用组剂量及疗程分别同联合治疗组。结果 3组均无明显副反应，丙氨酸转氨酶(ALT)复常率无差异。3组HBV DNA阴转率分别为89．3％、66．7％、40．6％，差异有显著性。乙型肝炎表面抗原(HBeAg)阴转率分别为28．6％、23．3％、21．9％，差异无显著性。结论 拉米夫定与泛昔洛韦联合用药安全、耐受性好，临床显示联合治疗对HBV DNA的抑制作用显著优于单用药。     

Serum HBsAg levels during peginterferon α-2a treatment with or without thymosin α-1 in HBeAg-positive chronic hepatitis B patients

The importance of serum hepatitis B surface antigen (HBsAg) level as a surrogate marker for viral load and a predictor of treatment response remains unclear. The aim of this study was to investigate whether serum HBsAg correlates with serum hepatitis B virus (HBV) DNA during peginterferon (PEG-IFN) α-2a treatment (with or without thymosin α-1) in hepatitis B e antigen (HBeAg)-positive chronic hepatitis B patients and whether it can predict treatment response. Sera from 37 HBeAg-positive chronic hepatitis B patients receiving 48-weeks PEG-IFN α-2a with (n = 20) or without (n = 17) an initial 12-weeks thymosin α-1 were obtained at baseline and at weeks 12, 24, 36, 48 (end of treatment), 56, 72, 84, and 96 (end of follow-up). Taqman HBV DNA tests (Roche) and Architect HBsAg QT (Abbott) were performed. There was a moderate correlation between the HBsAg and HBV DNA levels (r = 0.452, P < 0.001). Median HBsAg levels at baseline and at week 96 were 6,218 IU/ml and 4,038 IU/ml, respectively. The mean HBV DNA and alanine aminotransferase (ALT) levels were 7.48 log(10) IU/ml and 173 IU/L at baseline and 5.37 log(10) IU/ml and 102 IU/L at week 96, respectively. A decrease to <60% of baseline levels of HBsAg at week 12 was identified as an independent predictive factor for HBeAg seroconversion (OR = 45.7, P < 0.05) at week 96. Serum HBsAg levels may be helpful for predicting the response to PEG-IFN therapy in HBeAg-positive chronic hepatitis B patients.     

Application strategies of serum HBV DNA detection in HBV infection patients: A retrospective study of 5611 specimens

The detection of hepatitis B virus (HBV) DNA plays a critical role in determining the level of viral replication in HBV-infected patients. However, how to select appropriate HBV DNA detection method, low-sensitivity (ls) and hypersensitivity (hs) remains unclear. In this study, hepatitis B surface antigen (HBsAg), hepatitis B e-antigen (HBeAg), alanine transaminase (ALT), aspartate transaminase (AST), and hs HBV DNA titers in serum of 5611 cases with suspected HBV infection were reviewed. Besides, the dynamic changes of HBV DNA and HBsAg in 85 chronic hepatitis B (CHB) patients receiving peginterferon α (PegIFNα) or entecavir (ETV) were observed. The results showed the positive rate of HBV DNA was 32.8%, of which low viral load (20 to 500 IU/mL) accounted for 51.8%. In the 5611 cases, when the HBsAg was less than 1000 IU/mL, the proportion of low viral load was 76.3%. Moreover, in patients receiving antiviral treatment, when HBsAg was less than 2000 IU/mL (PegIFNα) or HBsAg was less than 3500 IU/mL (ETV), the proportion of patients with low viral load was 79.5% or 78.0%, respectively. We developed a strategy of serum HBV DNA detection in HBV-infected patients. When HBsAg was negative, HBV DNA detection should be unnecessary. When HBsAg was 0.05 to 1000 IU/mL, hs HBV DNA should be detected in patients with abnormal level of ALT, AST, or HBeAg. While HBsAg was greater than or equal to 1000 IU/mL, ls HBV DNA was recommended. Moreover, the cutoff value of HBsAg increased during antiviral therapy of CHB patients. In conclusion, hs HBV DNA is of great value in HBV-infected patients with low viral load. HBV DNA detection methods should be selected reasonably according to the levels of HBsAg, HBeAg, ALT, and AST.     

血清乙型肝炎病毒前S1抗原检测及其与病毒复制的关系

用抗Ｓ和抗前Ｓ１单抗的双抗体夹心ＥＬＩＳＡ法检测１５０例慢性乙型肝炎患者、乙型肝炎病毒表面抗原（ＨＢｓＡｇ）携带者和健康人血清中的ＨＢＶ前Ｓ１抗原，其结果和ＨＢＶＤＮＡ聚合酶链反应（ＰＣＲ）、乙型肝炎血清标志的检测结果进行比较。结果表明：前Ｓ１抗原在乙型肝炎病毒ｅ抗原（ＨＢｅＡｇ）阳性组中的检出率和相对滴度显著高于ＨＢｅＡｇ阴性组（Ｐ＜０．０１）；在ＨＢｅＡｇ阴性组中，抗－ＨＢｅ阴性人群前Ｓ１抗原的检出率和相对滴度也显著高于抗－ＨＢｅ阳性人群（Ｐ＜０．０１）。前Ｓ１抗原和ＨＢＶＤＮＡ检测结果的符合率达８０％，两者检出率的相关系数ｒ＝０．９８２６（Ｐ＜０．０１）。结论：血清前Ｓ１抗原和乙型肝炎病毒的存在关系密切。     

中草药叶下珠不同品种和制剂体外抗乙型肝炎病毒的实验研究

以２．２．１５细胞为模型，对不同品种、剂型和添加成份的叶下珠提取物进行了体外抗乙型肝炎病毒（ＨＢＶ）活性的研究。结果显示，七种受试药物体外均有不同程度的抗ＨＢＶ活性。其中以沱茶珍珠草、胶囊１号作用最明显，在浓度为５００ｍｇ／Ｌ时对ＨＢｓＡｇ的抑制率可达１００％，而未显示出明显的细胞毒性。Ｓｏｕｔｈｅｒｎ印迹杂交显示，胶囊１号对细胞内外ＨＢＶＤＮＡ的抑制呈剂量依赖型。还观察到，药物对病毒颗粒产生的抑制不仅在转录前水平，可能对ｍＲＮＡ的翻译水平也有影响。