本研究旨为研究人蛔虫和猪蛔虫核糖体第一内转录间隔区(ITS-1 r DNA)的遗传变异,应用聚合酶链式反应(PCR)对人蛔虫和猪蛔虫分离株ITS-1 r DNA序列进行扩增、克隆、测序,将获得的序列用Clustal X 1.83程序进行比对分析,再用Phy ML 3.0程...本研究旨为研究人蛔虫和猪蛔虫核糖体第一内转录间隔区(ITS-1 r DNA)的遗传变异,应用聚合酶链式反应(PCR)对人蛔虫和猪蛔虫分离株ITS-1 r DNA序列进行扩增、克隆、测序,将获得的序列用Clustal X 1.83程序进行比对分析,再用Phy ML 3.0程序中的最大似然树法(ML)绘制种系进化树。本结果显示,人蛔虫和猪蛔虫的ITS-1 r DNA序列长度分别为447~448 bp和447~451 bp;人蛔虫和猪蛔虫ITS-1 r DNA序列的差异性为0.4%~1.6%。种系发育树表明,人蛔虫和猪蛔虫分离株位于两个不同分支。本研究结果支持人蛔虫和猪蛔虫可能为同一个种不同基因型的结论。展开更多
In order to provide further evidence to prove that Ascaris suum Goeze,1782 and Ascaris lumbricoides Linnaeus,1758 are really different species in taxonomy,and to identity A.suum larval migrans-related genes for diagno...In order to provide further evidence to prove that Ascaris suum Goeze,1782 and Ascaris lumbricoides Linnaeus,1758 are really different species in taxonomy,and to identity A.suum larval migrans-related genes for diagnosis and prevention use,A.suum genes that were differentialy expressed from the same gender of A.lumbricoides were enriched by subtracting the same expressed genes using suppression subtractive hybridization （SSH） assay.Specificity of the selectively enriched cDNA was verified by Southern blot analysis.The female A.suum specific cDNA library was then constructed and sequenced.Basic local alignment search tool （BLAST） analysis of female A.suum specific cDNA identified 6 specific ESTs with tentative functions related to larva migrans.This study provided further evidence for differentiating A.suum from A.lumbricoides.Mining for the detailed information and application of the 6 ESTs are worth being done in the future studies.展开更多
文摘本研究旨为研究人蛔虫和猪蛔虫核糖体第一内转录间隔区(ITS-1 r DNA)的遗传变异,应用聚合酶链式反应(PCR)对人蛔虫和猪蛔虫分离株ITS-1 r DNA序列进行扩增、克隆、测序,将获得的序列用Clustal X 1.83程序进行比对分析,再用Phy ML 3.0程序中的最大似然树法(ML)绘制种系进化树。本结果显示,人蛔虫和猪蛔虫的ITS-1 r DNA序列长度分别为447~448 bp和447~451 bp;人蛔虫和猪蛔虫ITS-1 r DNA序列的差异性为0.4%~1.6%。种系发育树表明,人蛔虫和猪蛔虫分离株位于两个不同分支。本研究结果支持人蛔虫和猪蛔虫可能为同一个种不同基因型的结论。
基金supported by China Postdoctoral Science Fundation (2004035591)the China National Science Funds for Distingusied Young Scientists (30225033)
文摘In order to provide further evidence to prove that Ascaris suum Goeze,1782 and Ascaris lumbricoides Linnaeus,1758 are really different species in taxonomy,and to identity A.suum larval migrans-related genes for diagnosis and prevention use,A.suum genes that were differentialy expressed from the same gender of A.lumbricoides were enriched by subtracting the same expressed genes using suppression subtractive hybridization （SSH） assay.Specificity of the selectively enriched cDNA was verified by Southern blot analysis.The female A.suum specific cDNA library was then constructed and sequenced.Basic local alignment search tool （BLAST） analysis of female A.suum specific cDNA identified 6 specific ESTs with tentative functions related to larva migrans.This study provided further evidence for differentiating A.suum from A.lumbricoides.Mining for the detailed information and application of the 6 ESTs are worth being done in the future studies.
