摘要
目的 :建立扩增登革 2型病毒基因组全长cDNA的融合PCR法 ,为深入探讨病毒基因组的结构与功能提供有效的技术途径。方法 :根据我国登革 2型病毒D2 4 3株序列设计引物 ,首先采用长链RT PCR技术扩增病毒基因组 5′及 3′半分子 ,然后以半分子采用融合PCR法将两个半分子构建成全长cDNA分子。为进一步证实所构建全长cDNA分子的特异性 ,再以融合PCR产物为模板扩增 5′非编码区序列 ,与pGEM T载体连接 ,在 377A型自动测序仪进行序列分析。结果 :通过对逆转录反应及PCR扩增条件的优化 ,建立了制备大片段cDNA及构建全长cDNA分子的融合PCR方法。扩增的我国登革 2型病毒的 5′及 3′半分子的长度均为 5kb左右 ,采用融合PCR方法制备的全长cDNA长约 11kb ,与预期大小一致 ,非编码区测序结果表明扩增产物为D2 4 3所特有。结论
Objective:To establish fusion PCR for amplification of the full length cDNA of dengue virus type 2. Methods:According to the published nucleotide sequence of D2 43,the primers were devised and the 5′ and 3′ half genomic cDNAs of dengue virus type 2 were amplified by long reverse transcription PCR. Using the PCR products as model,the approximate 11 kb full length cDNA was amplified by fusion PCR. The sequence containing the 5′ noncoding region was determined by PRISM TM ABI 377 automated sequencer. Results: Using fusion PCR,the full length cDNA of dengue virus type 2 was successfully amplified and its correctness was proved by partial nucleotide sequences analysis. To our best knowledge, this is the first report of the same kind.Conclusion:Fusion PCR is an effective method to amplify the genomic cDNA of dengue virus. [
出处
《军事医学科学院院刊》
CSCD
北大核心
2001年第2期137-139,共3页
Bulletin of the Academy of Military Medical Sciences
基金
国家自然科学基金!资助项目 (3 0 0 0 0 14 4 )
院科技创新启动基金资助
