目的利用P ich ia p astoris酵母表达系统表达糖基化的肿瘤相关抗原17-1A,为进一步设计肿瘤蛋白疫苗提供研究基础。方法通过RT-PCR从小鼠肾组织中扩增17-1A的cDNA,将其定向克隆到pP ICZαA质粒上,获得重组质粒pP ICZαA-17-1A,测序正确...目的利用P ich ia p astoris酵母表达系统表达糖基化的肿瘤相关抗原17-1A,为进一步设计肿瘤蛋白疫苗提供研究基础。方法通过RT-PCR从小鼠肾组织中扩增17-1A的cDNA,将其定向克隆到pP ICZαA质粒上,获得重组质粒pP ICZαA-17-1A,测序正确后,重组质粒电转化到P ich ia p astoris酵母菌株G S115中,在甲醇诱导下,利用其AOXⅠ基因的α信号肽,分泌表达17-1A抗原糖蛋白,并对获得的蛋白进行SDS-PAGE及W estern b lot分析鉴定。结果构建了pP ICZαA-17-1A重组质粒,通过电转化将目的基因整合入酵母基因组中,重组毕赤酵母表达能够表达17-1A抗原并检测到抗原发生了糖基化。结论能够通过毕赤酵母表达系统稳定表达糖基化的肿瘤相关抗原17-1A。展开更多
The tumor-associated antigen Ep-CAM (17-1A antigen), defined by the murine monoclonal antibody (mAb) 17-1A, has been identified as a 42-kD glycoprotein. The mAb 17-1A has been used for immunotherapy of colorectal can...The tumor-associated antigen Ep-CAM (17-1A antigen), defined by the murine monoclonal antibody (mAb) 17-1A, has been identified as a 42-kD glycoprotein. The mAb 17-1A has been used for immunotherapy of colorectal cancer. We obtained mAb 19F4 using a synthetic peptide containing antigen determinants of 17-1A antigen. The mAb 19F4 can bind the corresponding dominants of the 17-1A antigen in ELISA. Western-blot analysis demonstrated that mAb 19F4 recognized a 50-kD protein from cell lysates of MCF-7 (breast cancer cell line). Both mAb 19F4 and 17-1A detected a 42-kD protein in the cell lysates of HT-29 (colorectal cancer cell line). The results suggest that new members of the tumor-associated antigen family 17-1A may exist.展开更多
目的建立银杏叶药材中白果新酸(C13∶0)、白果酸(C15∶1)、十七烷二烯银杏酸(C17∶2)、氢化白果酸(C15∶0)和十七烷一烯银杏酸(C17∶1)等5种银杏酚酸类成分的含量测定方法。方法采用HPLC法。色谱柱为Phenomenex Luna C18(4.6mm×250...目的建立银杏叶药材中白果新酸(C13∶0)、白果酸(C15∶1)、十七烷二烯银杏酸(C17∶2)、氢化白果酸(C15∶0)和十七烷一烯银杏酸(C17∶1)等5种银杏酚酸类成分的含量测定方法。方法采用HPLC法。色谱柱为Phenomenex Luna C18(4.6mm×250 mm,5μm)色谱柱,以乙腈-0.1%磷酸(90∶10)为流动相,流速为1.0 m L·min-1,检测波长为310 nm,柱温为30℃。结果白果新酸(C13∶0)、白果酸(C15∶1)和十七烷一烯银杏酸(C17∶1)质量浓度分别在1.47~29.40、6.05~121.00、8.00~160.00μg·m L-1内呈良好线性关系,相关系数分别为0.999 9、0.999 9和0.999 9,平均回收率分别为98.6%(RSD=2.57%,n=9)、100.1%(RSD=2.36%,n=9)、97.4%(RSD=2.99%,n=9),建立了十七烷二烯银杏酸(C17∶2)、氢化白果酸(C15∶0)相对定量分析方法。结论该方法简便、准确、重现性好,可用于银杏叶的质量控制。不同产地、不同采收期的银杏叶药材中5种银杏酚酸类指标成分含量差异较大。展开更多
【目的】克隆金钱鱼cyp17a1基因,分析其在组织中的分布、卵巢不同发育时期中的表达变化,为金钱鱼繁殖生物学提供理论依据。【方法】通过金钱鱼转录组文库筛选和RT-PCR进行cyp17a1 c DNA序列扩增;用DNAstar软件比较Cyp17a1同源性,MEGA5....【目的】克隆金钱鱼cyp17a1基因,分析其在组织中的分布、卵巢不同发育时期中的表达变化,为金钱鱼繁殖生物学提供理论依据。【方法】通过金钱鱼转录组文库筛选和RT-PCR进行cyp17a1 c DNA序列扩增;用DNAstar软件比较Cyp17a1同源性,MEGA5.0构建系统进化树,RT-PCR检测cyp17a1组织表达,实时定量PCR检测不同卵巢发育时期cyp17a1的表达量。【结果】金钱鱼cyp17a1开放阅读框编码515个氨基酸残基;Cyp17a1氨基酸序列与同属鲈形目鱼类Cyp17a1同源性较高(87.8%～92.7%),与大黄鱼最高(92.7%),与其他目鱼类同源性次之(72.7%～85.0%),与硬骨鱼类Cyp17a2或Cyp17a1-like同源性最低(48.2%～51.7%);所有硬骨鱼类Cyp17a1聚为一支,在Cyp17a1分支中,金钱鱼与鲈形目鱼类聚为一支;cyp17a1在性腺中表达量较高,在精巢中表达最强;在肝、脑和头肾表达较弱;在脾脏、肠、心脏、肌肉和鳃中未检测到表达;卵巢中cyp17a1的表达量随卵巢发育逐渐增加,Ⅳ期卵巢中cyp17a1表达量最高。【结论】cyp17a1在性腺中表达量较高,在金钱鱼卵巢发育过程中有重要作用。展开更多
文摘目的利用P ich ia p astoris酵母表达系统表达糖基化的肿瘤相关抗原17-1A,为进一步设计肿瘤蛋白疫苗提供研究基础。方法通过RT-PCR从小鼠肾组织中扩增17-1A的cDNA,将其定向克隆到pP ICZαA质粒上,获得重组质粒pP ICZαA-17-1A,测序正确后,重组质粒电转化到P ich ia p astoris酵母菌株G S115中,在甲醇诱导下,利用其AOXⅠ基因的α信号肽,分泌表达17-1A抗原糖蛋白,并对获得的蛋白进行SDS-PAGE及W estern b lot分析鉴定。结果构建了pP ICZαA-17-1A重组质粒,通过电转化将目的基因整合入酵母基因组中,重组毕赤酵母表达能够表达17-1A抗原并检测到抗原发生了糖基化。结论能够通过毕赤酵母表达系统稳定表达糖基化的肿瘤相关抗原17-1A。
基金Supported by the National Key Basic Research SpecificFunds(No.G19990 75 60 7) and the National ScienceFoundation for Outstanding Young Scientist of China(No.3 0 0 2 5 0 3 8)
文摘The tumor-associated antigen Ep-CAM (17-1A antigen), defined by the murine monoclonal antibody (mAb) 17-1A, has been identified as a 42-kD glycoprotein. The mAb 17-1A has been used for immunotherapy of colorectal cancer. We obtained mAb 19F4 using a synthetic peptide containing antigen determinants of 17-1A antigen. The mAb 19F4 can bind the corresponding dominants of the 17-1A antigen in ELISA. Western-blot analysis demonstrated that mAb 19F4 recognized a 50-kD protein from cell lysates of MCF-7 (breast cancer cell line). Both mAb 19F4 and 17-1A detected a 42-kD protein in the cell lysates of HT-29 (colorectal cancer cell line). The results suggest that new members of the tumor-associated antigen family 17-1A may exist.
文摘【目的】克隆金钱鱼cyp17a1基因,分析其在组织中的分布、卵巢不同发育时期中的表达变化,为金钱鱼繁殖生物学提供理论依据。【方法】通过金钱鱼转录组文库筛选和RT-PCR进行cyp17a1 c DNA序列扩增;用DNAstar软件比较Cyp17a1同源性,MEGA5.0构建系统进化树,RT-PCR检测cyp17a1组织表达,实时定量PCR检测不同卵巢发育时期cyp17a1的表达量。【结果】金钱鱼cyp17a1开放阅读框编码515个氨基酸残基;Cyp17a1氨基酸序列与同属鲈形目鱼类Cyp17a1同源性较高(87.8%～92.7%),与大黄鱼最高(92.7%),与其他目鱼类同源性次之(72.7%～85.0%),与硬骨鱼类Cyp17a2或Cyp17a1-like同源性最低(48.2%～51.7%);所有硬骨鱼类Cyp17a1聚为一支,在Cyp17a1分支中,金钱鱼与鲈形目鱼类聚为一支;cyp17a1在性腺中表达量较高,在精巢中表达最强;在肝、脑和头肾表达较弱;在脾脏、肠、心脏、肌肉和鳃中未检测到表达;卵巢中cyp17a1的表达量随卵巢发育逐渐增加,Ⅳ期卵巢中cyp17a1表达量最高。【结论】cyp17a1在性腺中表达量较高,在金钱鱼卵巢发育过程中有重要作用。
