The eukaryotic vectors VR1012 expressing survivin or 33 tandem repeats of human mucin 1（MUC1）（VNTRs）,namely,VR1012-S and VR1012-VNTR（VNTR=variable number of tandem repeat）,were constructed by cloning survivin an...The eukaryotic vectors VR1012 expressing survivin or 33 tandem repeats of human mucin 1（MUC1）（VNTRs）,namely,VR1012-S and VR1012-VNTR（VNTR=variable number of tandem repeat）,were constructed by cloning survivin and VNTR genes into VR1012,respectively.The eukaryotic vector pEGFP expressing survivin and MUC1 VNTRs fusion gene pEGFP-MS was also constructed.Mouse melanoma cell line（B16） stably expressing survivin and MUC1 VNTRs（MS ＋ B16） was established by Lipofectamine-mediated transfection of pEGFP-MS into B16 cells.EGFP expression in MS ＋ B16 cells was observed using a fluorescent microscope and survivin and MUC1 VNTRs（MS） expression was confirmed by means of Western blot analysis.A syngenic graft tumor model was generated by subcutaneous injection of MS ＋ B16 cells into C57/BL6 mice and tumor size increased rapidly with time in a cell number dependent manner.After the third immunization,mice were challenged subcutaneously with 5×l0 5 MS ＋ B16 cells.Compared with that of the negative control immunized with phosphate-buffered saline（PBS）,a significant reduction of tumor growth was observed in groups immunized with survivin plasmid DNA and MUC1 VNTRs plasmid DNA.Thus,the suppression of subcutaneous tumor was antigen-specific.This model is useful for the development of tumor vaccines targeting survivin and MUCI VNTRs.展开更多
目的改进以测序为基础(sequencing based typing,SBT)的HLA-DRB1基因分型方法,从而降低其分型成本和工作量。方法根据序列比对结果将DRB1基因分为6个簇(cluster),并设计6对簇特异引物(cluster specific primer,CSP),依据其对应的等位基...目的改进以测序为基础(sequencing based typing,SBT)的HLA-DRB1基因分型方法,从而降低其分型成本和工作量。方法根据序列比对结果将DRB1基因分为6个簇(cluster),并设计6对簇特异引物(cluster specific primer,CSP),依据其对应的等位基因簇在人群中的频率高低,利用巢式PCR和CSPs渐进式地扩增,PCR产物纯化后进行测序分型。我们将此方法命名为以频率为基础的CSP-SBT法(Frequency based-CSP-SBT,FB-CSP-SBT)。结果用FB-CSP-SBT法对224个中国南方汉族冠心病患者临床样本进行HLA-DRB1等位基因分型,总共鉴定出31个等位基因型,覆盖了所有的HLA-DRB1等位基因谱系。其中,4个在人群中频率最高的簇依次为DR52(47.99%,包含DRB1*03、DRB1*08、DRB1*11、DRB1*12、DRB1*13和DRB1*14等6个DRB1等位基因谱系)、DR15(19.20%,包括DRB1*15和DRB1*16)、DR79(18.53%,包括DRB1*07和DRB1*09)和DR04(12.72%),占整个人群的98%以上。观察到的杂合性(heterozygosity)为0.9107,与前人报道的HLA-DRB1基因位点的杂合性相似,基因型分布符合Hardy-Weinberg平衡(P=0.3517)。对于每个样本,利用此方法对DRB1基因进行测序分型比传统的SBT至少减少6～8个PCR反应,同时还减少了测序反应的数目。结论用FB-CSP-SBT法可以准确地对HLA-DRB1基因进行分型,比传统的SBT法减少了工作量并降低了分型成本。展开更多
基金Supported by the National Natural Science Foundation of China(No.30872396)the Scientific Research Foundation of Jilin Province,China(Nos.20080709,200905169)the Jilin University Basic Research Project,China(No.200903255)
文摘The eukaryotic vectors VR1012 expressing survivin or 33 tandem repeats of human mucin 1（MUC1）（VNTRs）,namely,VR1012-S and VR1012-VNTR（VNTR=variable number of tandem repeat）,were constructed by cloning survivin and VNTR genes into VR1012,respectively.The eukaryotic vector pEGFP expressing survivin and MUC1 VNTRs fusion gene pEGFP-MS was also constructed.Mouse melanoma cell line（B16） stably expressing survivin and MUC1 VNTRs（MS ＋ B16） was established by Lipofectamine-mediated transfection of pEGFP-MS into B16 cells.EGFP expression in MS ＋ B16 cells was observed using a fluorescent microscope and survivin and MUC1 VNTRs（MS） expression was confirmed by means of Western blot analysis.A syngenic graft tumor model was generated by subcutaneous injection of MS ＋ B16 cells into C57/BL6 mice and tumor size increased rapidly with time in a cell number dependent manner.After the third immunization,mice were challenged subcutaneously with 5×l0 5 MS ＋ B16 cells.Compared with that of the negative control immunized with phosphate-buffered saline（PBS）,a significant reduction of tumor growth was observed in groups immunized with survivin plasmid DNA and MUC1 VNTRs plasmid DNA.Thus,the suppression of subcutaneous tumor was antigen-specific.This model is useful for the development of tumor vaccines targeting survivin and MUCI VNTRs.
文摘目的改进以测序为基础(sequencing based typing,SBT)的HLA-DRB1基因分型方法,从而降低其分型成本和工作量。方法根据序列比对结果将DRB1基因分为6个簇(cluster),并设计6对簇特异引物(cluster specific primer,CSP),依据其对应的等位基因簇在人群中的频率高低,利用巢式PCR和CSPs渐进式地扩增,PCR产物纯化后进行测序分型。我们将此方法命名为以频率为基础的CSP-SBT法(Frequency based-CSP-SBT,FB-CSP-SBT)。结果用FB-CSP-SBT法对224个中国南方汉族冠心病患者临床样本进行HLA-DRB1等位基因分型,总共鉴定出31个等位基因型,覆盖了所有的HLA-DRB1等位基因谱系。其中,4个在人群中频率最高的簇依次为DR52(47.99%,包含DRB1*03、DRB1*08、DRB1*11、DRB1*12、DRB1*13和DRB1*14等6个DRB1等位基因谱系)、DR15(19.20%,包括DRB1*15和DRB1*16)、DR79(18.53%,包括DRB1*07和DRB1*09)和DR04(12.72%),占整个人群的98%以上。观察到的杂合性(heterozygosity)为0.9107,与前人报道的HLA-DRB1基因位点的杂合性相似,基因型分布符合Hardy-Weinberg平衡(P=0.3517)。对于每个样本,利用此方法对DRB1基因进行测序分型比传统的SBT至少减少6～8个PCR反应,同时还减少了测序反应的数目。结论用FB-CSP-SBT法可以准确地对HLA-DRB1基因进行分型,比传统的SBT法减少了工作量并降低了分型成本。
