【目的】为了预测无关捐献者干细胞移植(HSCT)后GVHD的发生及程度和选择相容的干细胞捐献者,通过同时采用PCR-序列特异性引物扩增技术(sequence specific primer,PCR-SSP)和PCR-直接碱基序列分析基因分型技术(sequence based genotyping...【目的】为了预测无关捐献者干细胞移植(HSCT)后GVHD的发生及程度和选择相容的干细胞捐献者,通过同时采用PCR-序列特异性引物扩增技术(sequence specific primer,PCR-SSP)和PCR-直接碱基序列分析基因分型技术(sequence based genotyping,PCR-SBT)的方法,提高HLA基因分型的准确性和分辨水平。【方法】采用PCR-SSP和PCR-SBT分别对57份捐献者血样进行HLA-A、B和DRB1位点的高分辨等位基因分型(即识别基因的编码达到*后4位数)。【结果】PCR-SBT实验中有27份DNA的基因分析结果模棱两可,PCR-SSP实验中有10份DNA的基因分析结果模棱两可。经两种方法相互佐证实验后,57份样本均获得结果一致、清楚和精确的HLA-A、B、DRB1位点高分辨基因分型。【结论】PCR-SSP和PCR- SBT是HLA高分辨基因分析的标准方法,两种方法具有实验互补意义,若同时应用两种方法能够有效改善HLA等位基因高分辨分型的准确性和重复一致率。展开更多
Determining the base sequence of DNA broken site is quite crucial for the study on the cleavage site specificity and mechanism of various natural or synthetic DNA cleavage regents,and on developing novel therapeutic d...Determining the base sequence of DNA broken site is quite crucial for the study on the cleavage site specificity and mechanism of various natural or synthetic DNA cleavage regents,and on developing novel therapeutic drugs targeting at DNA.The most frequently used method depending on chemical reactions of the Maxam-Gilbert procedure,and the late arising methods used by Rui Ren et al.which were based on Sanger’s DNA sequencing strategy,all had some deficiencies,either the pollution of radioactive materials,or really complicated and difficult to operate.In the present paper,a new method for DNA cleavage site sequence determination was developed.The fluorescence FAM-labeled primer was annealed to the DNA fragments,which has been cleaved by restriction enzymes or other regents,and extended along the template sequence.The products then loaded onto the polyacrylamide electrophoresis gel of ABI 377 DNA Sequencer.Data was collected and analyzed by using ABI PRISM Data Collection Software and ABI PRISM Sequencing Analysis Software.It is proved to be a credible and simple new approach to determine the base sequence of DNA broken sites.展开更多
文摘【目的】为了预测无关捐献者干细胞移植(HSCT)后GVHD的发生及程度和选择相容的干细胞捐献者,通过同时采用PCR-序列特异性引物扩增技术(sequence specific primer,PCR-SSP)和PCR-直接碱基序列分析基因分型技术(sequence based genotyping,PCR-SBT)的方法,提高HLA基因分型的准确性和分辨水平。【方法】采用PCR-SSP和PCR-SBT分别对57份捐献者血样进行HLA-A、B和DRB1位点的高分辨等位基因分型(即识别基因的编码达到*后4位数)。【结果】PCR-SBT实验中有27份DNA的基因分析结果模棱两可,PCR-SSP实验中有10份DNA的基因分析结果模棱两可。经两种方法相互佐证实验后,57份样本均获得结果一致、清楚和精确的HLA-A、B、DRB1位点高分辨基因分型。【结论】PCR-SSP和PCR- SBT是HLA高分辨基因分析的标准方法,两种方法具有实验互补意义,若同时应用两种方法能够有效改善HLA等位基因高分辨分型的准确性和重复一致率。
文摘Determining the base sequence of DNA broken site is quite crucial for the study on the cleavage site specificity and mechanism of various natural or synthetic DNA cleavage regents,and on developing novel therapeutic drugs targeting at DNA.The most frequently used method depending on chemical reactions of the Maxam-Gilbert procedure,and the late arising methods used by Rui Ren et al.which were based on Sanger’s DNA sequencing strategy,all had some deficiencies,either the pollution of radioactive materials,or really complicated and difficult to operate.In the present paper,a new method for DNA cleavage site sequence determination was developed.The fluorescence FAM-labeled primer was annealed to the DNA fragments,which has been cleaved by restriction enzymes or other regents,and extended along the template sequence.The products then loaded onto the polyacrylamide electrophoresis gel of ABI 377 DNA Sequencer.Data was collected and analyzed by using ABI PRISM Data Collection Software and ABI PRISM Sequencing Analysis Software.It is proved to be a credible and simple new approach to determine the base sequence of DNA broken sites.
