Infantile (INCL, NCL1) and late-infantile (LINCL, NCL2) neuronal ceroid lipofuscinoses have been found to result from genetic deficiency of genes CLN 1 and CLN 2, respectively. The application of molecular analyses ca...Infantile (INCL, NCL1) and late-infantile (LINCL, NCL2) neuronal ceroid lipofuscinoses have been found to result from genetic deficiency of genes CLN 1 and CLN 2, respectively. The application of molecular analyses can facilitate prenatal diagnosis for families affected by NCL1 or NCL2, in which the familial mutation(s) have been identified. Molecular testing with allele-specific primer extension and DNA sequencing was performed in nine pregnancies, four from two NCL1 families and five from five NCL2 families. Lysosomal enzyme activity assays were carried out as well.Four fetuses from three pregnancies in NCL1 families were found to be carriers for a mutation 451C-T in the CLN 1 gene and one was normal. Prenatal testing of three NCL2 families who carried mutation R208X in the CLN 2 gene showed that all fetuses were carriers. In NCL2 families who carried either mutation IVS5-1C or/and IVS5-1A two normal pregnancies were detected. Our studies indicate that DNA testing, which may provide definitive prenatal diagnosis for NCL, may be used in combination with lysosomal enzyme activity analyses.展开更多
目的建立人工修饰双等位基因特异性引物结合SYBR Green Ⅰ荧光PCR法检测GSTP1第105个密码子基因多态性的方法,并利用该法研究GSTP1第105个密码子在广西百色市人群遗传特征,为进一步研究GSTP1基因多态性与疾病的发生易感性研究奠定基础...目的建立人工修饰双等位基因特异性引物结合SYBR Green Ⅰ荧光PCR法检测GSTP1第105个密码子基因多态性的方法,并利用该法研究GSTP1第105个密码子在广西百色市人群遗传特征,为进一步研究GSTP1基因多态性与疾病的发生易感性研究奠定基础。方法采用人工修饰双等位基因特异性引物结合SYBR Green Ⅰ荧光PCR法技术对211例广西百色市健康成人进行GSTP1 Ile105Val基因分型,并分析是否存在性别差异及与国内外其他人群分布频率差异。结果人工修饰双等位基因特异性引物结合SYBR Green Ⅰ荧光PCR法GSTP1基因型检测结果与PCR产物测序结果一致,用此法检测出广西百色市女性和男性人群GSTP1 Ile105Val均以A等位基因为主,分别为79.7%和84.5%;AA野生纯合子型、AG杂合子型和GG突变纯合型在女性人群中分别为62.2%、35.1%和2.7%,男性人群则为71.0%、27.0%和2.0%。经统计学分析,广西GSTP1Ile105Val等位基因和基因型分布频率无性别差异,与辽宁、回族、印度、俄罗斯族等人群相应位点基因型分布频率无差异,但与国内维族、朝鲜族、蒙古族、高加索女性相比差异有统计学意义(P<0.01)。结论人工修饰双等位基因特异性引物结合SYBR Green Ⅰ荧光PCR法是一种快捷、准确的基因多态性检测方法。广西人群GSTP1基因Ile105Val呈多态性分布,基因型分布频率无性别差异,与其他部分种族存在差异。展开更多
文摘Infantile (INCL, NCL1) and late-infantile (LINCL, NCL2) neuronal ceroid lipofuscinoses have been found to result from genetic deficiency of genes CLN 1 and CLN 2, respectively. The application of molecular analyses can facilitate prenatal diagnosis for families affected by NCL1 or NCL2, in which the familial mutation(s) have been identified. Molecular testing with allele-specific primer extension and DNA sequencing was performed in nine pregnancies, four from two NCL1 families and five from five NCL2 families. Lysosomal enzyme activity assays were carried out as well.Four fetuses from three pregnancies in NCL1 families were found to be carriers for a mutation 451C-T in the CLN 1 gene and one was normal. Prenatal testing of three NCL2 families who carried mutation R208X in the CLN 2 gene showed that all fetuses were carriers. In NCL2 families who carried either mutation IVS5-1C or/and IVS5-1A two normal pregnancies were detected. Our studies indicate that DNA testing, which may provide definitive prenatal diagnosis for NCL, may be used in combination with lysosomal enzyme activity analyses.
文摘目的建立人工修饰双等位基因特异性引物结合SYBR Green Ⅰ荧光PCR法检测GSTP1第105个密码子基因多态性的方法,并利用该法研究GSTP1第105个密码子在广西百色市人群遗传特征,为进一步研究GSTP1基因多态性与疾病的发生易感性研究奠定基础。方法采用人工修饰双等位基因特异性引物结合SYBR Green Ⅰ荧光PCR法技术对211例广西百色市健康成人进行GSTP1 Ile105Val基因分型,并分析是否存在性别差异及与国内外其他人群分布频率差异。结果人工修饰双等位基因特异性引物结合SYBR Green Ⅰ荧光PCR法GSTP1基因型检测结果与PCR产物测序结果一致,用此法检测出广西百色市女性和男性人群GSTP1 Ile105Val均以A等位基因为主,分别为79.7%和84.5%;AA野生纯合子型、AG杂合子型和GG突变纯合型在女性人群中分别为62.2%、35.1%和2.7%,男性人群则为71.0%、27.0%和2.0%。经统计学分析,广西GSTP1Ile105Val等位基因和基因型分布频率无性别差异,与辽宁、回族、印度、俄罗斯族等人群相应位点基因型分布频率无差异,但与国内维族、朝鲜族、蒙古族、高加索女性相比差异有统计学意义(P<0.01)。结论人工修饰双等位基因特异性引物结合SYBR Green Ⅰ荧光PCR法是一种快捷、准确的基因多态性检测方法。广西人群GSTP1基因Ile105Val呈多态性分布,基因型分布频率无性别差异,与其他部分种族存在差异。
