By means of solvent extraction and repeated chromatography on silica gel, Sephadex LH-20, HPLC, and preparative TLC, the ethanol extract of the stems of Homalium ceylanicum(Flacourtiaceae/Salicaceae sensu lato) was ...By means of solvent extraction and repeated chromatography on silica gel, Sephadex LH-20, HPLC, and preparative TLC, the ethanol extract of the stems of Homalium ceylanicum(Flacourtiaceae/Salicaceae sensu lato) was chemically investigated, which led to the isolation of 13 constituents, including five lignans(1–5) and three isocoumarins(6–8). Based on the spectroscopic analysis and comparison of its 1H NMR and 13C NMR data with those in literatures, their structures were identified as(–)-5'-methoxyisolariciresinol 3α-O-β-D-glucopyranoside(1),(+)-lyoniresinol 3α-O-β-D-glucopyranoside(2),(+)-isolarisiresinol 3α-O-β-Dglucopyranoside(3),(–)-isolarisiresinol 3α-O-β-D-glucopyranoside(4), icariside E5(5), 3-phenylisocoumarin(6), homalicine(7),(–)-dihydrohomalicine(8), friedelin(9), 4-hydroxybenzoic acid(10), catechol(11), methyl-α-arabinofuranoside(12), and uridine(13). All isolates except compounds 6–8 were described from this genus for the first time. Compound 6 was isolated from this species for the first time.展开更多
目的为了解青海省犬科动物流行的钩虫种类,为青藏高原地区钩虫的流行分布及种群进化研究提供依据。方法2014—2016年在青海省达日县和兴海县分别收集犬科动物粪便样本,洗脱获取粪便表面动物细胞,通过PCR扩增和测序对粪便标本溯源,以饱...目的为了解青海省犬科动物流行的钩虫种类,为青藏高原地区钩虫的流行分布及种群进化研究提供依据。方法2014—2016年在青海省达日县和兴海县分别收集犬科动物粪便样本,洗脱获取粪便表面动物细胞,通过PCR扩增和测序对粪便标本溯源,以饱和蔗糖水漂浮法进行粪便虫卵检查,收集虫卵提取DNA,以聚合酶链反应-限制性内切酶片段长度多态性(PCR-restriction fragment length polymorphism,PCR-RFLP)法进行虫种鉴定。结果通过动物粪便溯源试验,获得动物线粒体D-loop区域长度为372bp的基因片段,运用基本局部比对搜索工具(basic local alignment search tool,BLAST)分析显示达日县和兴海县动物粪便标本来源分别为家犬和红狐;虫卵内转录间隔区(internal transcribed spacer,ITS)的PCR扩增,获得长度约为544bp的特异性电泳条带,PCR产物经限制性内切酶RsaⅠ和HinfⅠ的酶切反应显示特异性的酶切、电泳条带,两个钩虫样本均被鉴定为锡兰钩虫。结论锡兰钩虫首次在青藏高原地区报道,并在野生红狐体内被发现,有一定的生物学意义。展开更多
为了对从猫粪便样品中分离的钩虫虫卵进行种类鉴定,本研究提取该虫卵基因组DNA,根据核糖体内转录间区1(ITS1)的保守序列设计钩虫属引物,通过PCR扩增、克隆、测序、相关软件分析,建立系统进化树,从分子水平对其进行种类鉴定。结果表明扩...为了对从猫粪便样品中分离的钩虫虫卵进行种类鉴定,本研究提取该虫卵基因组DNA,根据核糖体内转录间区1(ITS1)的保守序列设计钩虫属引物,通过PCR扩增、克隆、测序、相关软件分析,建立系统进化树,从分子水平对其进行种类鉴定。结果表明扩增出404 bp DNA片段,测序结果显示该片段包括309 bp ITS1和95 bp的5.8S rDNA,与NCBI中登录的序列进行比对以及采用Clustal X和MEGA5.1软件分析确定该钩虫为锡兰钩虫。这是我国首次建立钩虫的分子鉴定方法,也是40年来再次发现猫源锡兰钩虫,为锡兰钩虫分子生物学和分子流行病学研究奠定了基础。展开更多
基金Program for Changjiang Scholar and Innovative Tea m in University(Grant No.985-2-063-112)
文摘By means of solvent extraction and repeated chromatography on silica gel, Sephadex LH-20, HPLC, and preparative TLC, the ethanol extract of the stems of Homalium ceylanicum(Flacourtiaceae/Salicaceae sensu lato) was chemically investigated, which led to the isolation of 13 constituents, including five lignans(1–5) and three isocoumarins(6–8). Based on the spectroscopic analysis and comparison of its 1H NMR and 13C NMR data with those in literatures, their structures were identified as(–)-5'-methoxyisolariciresinol 3α-O-β-D-glucopyranoside(1),(+)-lyoniresinol 3α-O-β-D-glucopyranoside(2),(+)-isolarisiresinol 3α-O-β-Dglucopyranoside(3),(–)-isolarisiresinol 3α-O-β-D-glucopyranoside(4), icariside E5(5), 3-phenylisocoumarin(6), homalicine(7),(–)-dihydrohomalicine(8), friedelin(9), 4-hydroxybenzoic acid(10), catechol(11), methyl-α-arabinofuranoside(12), and uridine(13). All isolates except compounds 6–8 were described from this genus for the first time. Compound 6 was isolated from this species for the first time.
文摘目的为了解青海省犬科动物流行的钩虫种类,为青藏高原地区钩虫的流行分布及种群进化研究提供依据。方法2014—2016年在青海省达日县和兴海县分别收集犬科动物粪便样本,洗脱获取粪便表面动物细胞,通过PCR扩增和测序对粪便标本溯源,以饱和蔗糖水漂浮法进行粪便虫卵检查,收集虫卵提取DNA,以聚合酶链反应-限制性内切酶片段长度多态性(PCR-restriction fragment length polymorphism,PCR-RFLP)法进行虫种鉴定。结果通过动物粪便溯源试验,获得动物线粒体D-loop区域长度为372bp的基因片段,运用基本局部比对搜索工具(basic local alignment search tool,BLAST)分析显示达日县和兴海县动物粪便标本来源分别为家犬和红狐;虫卵内转录间隔区(internal transcribed spacer,ITS)的PCR扩增,获得长度约为544bp的特异性电泳条带,PCR产物经限制性内切酶RsaⅠ和HinfⅠ的酶切反应显示特异性的酶切、电泳条带,两个钩虫样本均被鉴定为锡兰钩虫。结论锡兰钩虫首次在青藏高原地区报道,并在野生红狐体内被发现,有一定的生物学意义。
文摘为了对从猫粪便样品中分离的钩虫虫卵进行种类鉴定,本研究提取该虫卵基因组DNA,根据核糖体内转录间区1(ITS1)的保守序列设计钩虫属引物,通过PCR扩增、克隆、测序、相关软件分析,建立系统进化树,从分子水平对其进行种类鉴定。结果表明扩增出404 bp DNA片段,测序结果显示该片段包括309 bp ITS1和95 bp的5.8S rDNA,与NCBI中登录的序列进行比对以及采用Clustal X和MEGA5.1软件分析确定该钩虫为锡兰钩虫。这是我国首次建立钩虫的分子鉴定方法,也是40年来再次发现猫源锡兰钩虫,为锡兰钩虫分子生物学和分子流行病学研究奠定了基础。