目的评估PCR法制备的人21/13α卫星探针进行荧光原位杂交(fluorescence in situ hybridization,FISH)的特异性及敏感性,并探讨和建立该探针的临床诊断价值和产前诊断方法。方法利用PCR方法制备的人21/13α卫星探针与中期淋巴细胞染色体...目的评估PCR法制备的人21/13α卫星探针进行荧光原位杂交(fluorescence in situ hybridization,FISH)的特异性及敏感性,并探讨和建立该探针的临床诊断价值和产前诊断方法。方法利用PCR方法制备的人21/13α卫星探针与中期淋巴细胞染色体杂交以确定其杂交位点特异性及敏感性;并将探针与50例妊娠16~26周抽取的未培养的羊水细胞进行FISH,同时进行常规细胞培养及染色体核型分析以检测该探针进行产前诊断的特异性和敏感性。结果探针与中期淋巴细胞染色体的FISH结果显示,杂交点位于21/13号染色体的着丝粒,正常组和唐氏组细胞21号和13号染色体的平均检出率为96%;探针与羊水细胞FISH结果显示,其检出率为85.6%,准确率100%。结论制备的人21/13α着丝粒特异DNA探针能简便、快速、准确的检测羊水细胞间期核中21号或13号染色体的数目的异常,该探针可用于Downs综合征与Patau综合征的诊断。展开更多
多种小卫星探针和微卫星探针可以用来获得家畜家禽的 DNA 指纹图谱.象人的DNA 指纹图一样,畜禽的 DNA 指纹图也具有高度的变异性和稳定的遗传性.畜禽 DNA 指纹图已广泛地用于鉴定个体、测定品种(系)的遗传纯度和品种(系)间的遗传距离、...多种小卫星探针和微卫星探针可以用来获得家畜家禽的 DNA 指纹图谱.象人的DNA 指纹图一样,畜禽的 DNA 指纹图也具有高度的变异性和稳定的遗传性.畜禽 DNA 指纹图已广泛地用于鉴定个体、测定品种(系)的遗传纯度和品种(系)间的遗传距离、监测育种及遗传操作效应、寻找重要数量性状位点的遗传标记、开发单位点高变异探针等方面.展开更多
In the paper, DNA fingerprinting patterns of common vole (Microtus arvalis) were detected with HindIII, HinfI and microsatellite probe (GTG) 5 .The results showed that legible DNA fingerprints were not produced with H...In the paper, DNA fingerprinting patterns of common vole (Microtus arvalis) were detected with HindIII, HinfI and microsatellite probe (GTG) 5 .The results showed that legible DNA fingerprints were not produced with HindIII and probe (GTG) 5, however HinfI and probe (GTG)5 produced abundantly informative DNA fingerprints. DNA fingerprints were individual-specific and represented higher polymorphism in number, intensity and distribution bands among individuals. The band-sharing rates (BSR) between individuals were determined by the DNA fingerprints. The average band numbers and average band-sharing rates in fragment length region (FLR) of >2.3 kb were 29.625±5.012 and 0.388±0.083 respectively. Correlative fingerprint-data with the population were calculated from average BSR. In this study, a technical basis is established for application of multilocus DNA fingerprinting in common vole.展开更多
文摘目的评估PCR法制备的人21/13α卫星探针进行荧光原位杂交(fluorescence in situ hybridization,FISH)的特异性及敏感性,并探讨和建立该探针的临床诊断价值和产前诊断方法。方法利用PCR方法制备的人21/13α卫星探针与中期淋巴细胞染色体杂交以确定其杂交位点特异性及敏感性;并将探针与50例妊娠16~26周抽取的未培养的羊水细胞进行FISH,同时进行常规细胞培养及染色体核型分析以检测该探针进行产前诊断的特异性和敏感性。结果探针与中期淋巴细胞染色体的FISH结果显示,杂交点位于21/13号染色体的着丝粒,正常组和唐氏组细胞21号和13号染色体的平均检出率为96%;探针与羊水细胞FISH结果显示,其检出率为85.6%,准确率100%。结论制备的人21/13α着丝粒特异DNA探针能简便、快速、准确的检测羊水细胞间期核中21号或13号染色体的数目的异常,该探针可用于Downs综合征与Patau综合征的诊断。
文摘多种小卫星探针和微卫星探针可以用来获得家畜家禽的 DNA 指纹图谱.象人的DNA 指纹图一样,畜禽的 DNA 指纹图也具有高度的变异性和稳定的遗传性.畜禽 DNA 指纹图已广泛地用于鉴定个体、测定品种(系)的遗传纯度和品种(系)间的遗传距离、监测育种及遗传操作效应、寻找重要数量性状位点的遗传标记、开发单位点高变异探针等方面.
文摘In the paper, DNA fingerprinting patterns of common vole (Microtus arvalis) were detected with HindIII, HinfI and microsatellite probe (GTG) 5 .The results showed that legible DNA fingerprints were not produced with HindIII and probe (GTG) 5, however HinfI and probe (GTG)5 produced abundantly informative DNA fingerprints. DNA fingerprints were individual-specific and represented higher polymorphism in number, intensity and distribution bands among individuals. The band-sharing rates (BSR) between individuals were determined by the DNA fingerprints. The average band numbers and average band-sharing rates in fragment length region (FLR) of >2.3 kb were 29.625±5.012 and 0.388±0.083 respectively. Correlative fingerprint-data with the population were calculated from average BSR. In this study, a technical basis is established for application of multilocus DNA fingerprinting in common vole.