Clinical features of chronic hepatitis B patients with YMDD mutation after lamivudine therapy

INTRODUCTION Chronic hepatitis B(CHB)remains a major public health problem,affecting more than350mil-lion people worldwide.Cirrhosis,liver failure,or hepatocellular carcinoma will develop in approxi-mately15to40percent of infected patients(Ganem and Prince,2004).Lamivudine,an oral nucleoside analogue,inhibits HBV replication(de Clercq,2001;2004;Lai et al.,1997;1998;Marcellin et al.,2004).It can markedly reduce serum HBV DNA levels and normalize alanine aminotransferase(ALT)levels …     

SARS肺组织毒的分离及其全基因组cDNA文库的构建

利用常规病毒分离方法，自死亡病人肺组织病料剖检样品中成功分离到了强致病性SARS-Coy肺组织毒。根据已发表的SARS-Coy Tor2株序列，设计并合成了38条覆盖全长基因组的PCR引物。应用RT-PCR技术从实验感染的Vero E6细胞上清中成功地扩增出了各相应的cDNA重叠片段，分别克隆至pGEM-T载体后，构建了SARS-Coy肺组织毒全基因组cDNA文库。SARS-Coy肺组织毒全基因组cDNA文库的构建为进一步研究SARS-Coy的分子生物学特性奠定了基础。     

复方甘草酸苷联合拉米夫定治疗慢性乙型肝炎的临床研究

[目的]观察复方甘草酸苷对慢性乙型肝炎患者血清病毒学标志的影响．[方法]采用复方甘草酸苷联合拉米夫定治疗30例慢性乙肝患者,并与30例拉米夫定单药治疗患者比较,观察治疗后血清病毒学标志及肝功能指标的变化．[结果]治疗12周时联合治疗组血清HBeAg／抗-HBe转换率明显高于对照组；治疗12周和24周时联合治疗组肝功能指标复常率明显高于对照组．[结论]复方甘草酸苷治疗慢性乙型肝炎可能有助于患者在拉米夫定治疗过程中早期发生HBeAg／抗-HBe血清转换．     

关于冬虫夏草对乙型肝炎疗效及对免疫性肝损伤保护作用的研究

根据近10多年的研究报导及课题组的研究结果，综述了冬虫夏草（CS）对乙型肝炎的治疗效果及对免疫性肝损伤的保护作用。试验证明，乙型肝炎患者经CS治疗后，HbeAg有较高的阴转率，ALT、AST等肝功能指标明显改善，乏力、纳差等症状也大为好转，患者外周血中的CD3、CD4、CD4/CD8均明显提高。即便发生肝硬化者，经一定疗程CS治疗后，硬化症状减轻，肝纤维化得到有效控制和减轻。对免疫性肝损伤有很好的保护作用。     

双环醇治疗慢性乙型病毒性肝炎肝纤维化及其作用机制

[目的]观察双环醇对慢性乙型病毒性肝炎患者肝纤维化程度以及肝组织内转化生长因子β1(TGF-β1)和Ⅰ、Ⅲ型胶原含量的影响.[方法]20例慢性乙型病毒性肝炎患者以双环醇75~150 mg/d治疗24周,治疗前后分别肝活检进行常规病理学检查,并应用免疫组化技术和多媒体彩色病理图文分析系统观察双环醇治疗前后肝组织内TGF-β1和Ⅰ、Ⅲ型胶原含量的变化.[结果]慢性乙型病毒性肝炎肝纤维化患者经双环醇治疗后,肝组织炎症和纤维化程度明显改善,肝组织内TGF-β1和Ⅰ、Ⅲ型胶原含量均较治疗前明显降低,差异有显著性(P<0.05).[结论]双环醇治疗可以减轻慢性乙型病毒性肝炎患者肝脏炎症反应,同时明显降低慢性乙型病毒性肝炎患者肝组织内TGF-β1和Ⅰ、Ⅲ型胶原的含量,从而发挥抗纤维化作用.     

3种甘草酸苷对慢性乙肝患者血糖及肝功能病毒影响的临床研究

[目的]了解甘草酸苷对慢性乙肝患者血糖的影响.[方法]把95例确诊为慢性乙型肝炎的患者随机分为A、B、C三组,分别给予复方甘草酸苷80 m l、复方甘草酸单铵120 m l、甘草酸二铵40 m l静脉点滴,用药前、用药2周及4周观察三组患者的空腹血糖、肝功能、HBVM、HBV-DNA定量.[结果]治疗前三组患者空腹血糖的均数分别为5.28±1.75、5.32±1.66及5.65±1.82 mmol/L,在用药2周时,三组患者空腹血糖的均数即已有所下降,至用药4周其空腹血糖的均数分别为4.5 1±1.6 5、4.6 8±1.3 7及4.9 8±1.87 mmol/L,与治疗前相比三组患者空腹血糖的均数都有不同程度下降,但治疗前后的差异无显著性(P>0.05),各组之间下降的差异亦无显著性(P>0.05).[结论]甘草酸苷对慢性乙肝患者的血糖没有升高作用,反而在一定剂量下有降低的作用.     

Construction of a hepatic stellate cells subtracted cDNA library of differentially expressed genes in normal mice and mice with Schistosomiasis japonica

To construct a hepatic stellate cells (HSCs) subtracted cDNA library to find differentially expressed genes in normal mice and mice infected with Schistosomajaponicum (S. japonicum). Suppression subtractive hybridization (SSH) was used. The cDNA fragments of normal mouse were compared to those of schistosoma-infected mice to find differentially expressed genes. Then differentially expressed cDNA fragments were directly inserted into T/A cloning vector to set up the subtractive library. Amplification of the library was carried out with transformation of DH5α. The amplified library contained more than 400 positive bacterial clones, which were then hybridized with forward and backward subtracted probes for differential screening, One hundred positive bacterial clones were randomly selected for sequencing and BLAST analysis, Finally, virtual Northern Blot confirmed such differential expression. The subtracted cDNA library of differentially expressed genes of HSCs was constructed successfully, the library is efficient and lays foundation for screening and cloning new and specific genes of schistosomiasis.