目的基于液相芯片技术,建立一种可同时、快速检测细胞色素P4502C9(CytoChrome P4502C9,CYP2C 9)、CYP2C19、CYP4F2、维生素K环氧化物还原酶(vitamin K epoxide reductase,VKORCI)及ATP结合盒亚家族B成员l(ATP-binding cassette subfamil...目的基于液相芯片技术,建立一种可同时、快速检测细胞色素P4502C9(CytoChrome P4502C9,CYP2C 9)、CYP2C19、CYP4F2、维生素K环氧化物还原酶(vitamin K epoxide reductase,VKORCI)及ATP结合盒亚家族B成员l(ATP-binding cassette subfamily B memberl,ABCB1)等与华法林和氯吡格雷相关药物基因多态性的方法。方法方法学的建立。从Genbank中查找与华法林和氯吡格雷药物相关的8个靶位点附近基因序列,设计特异性引物和探针;通过多重PCR扩增,等位基因特异性引物延伸(allele specific primer extension,ASPE),MagPlex-Tag微球杂交,经液相芯片系统Luminex 200检测荧光信号,确定基因型;优化反应体系并进行方法学评价。收集2017年6月至2018年12月东莞市厚街医院抗血栓治疗患者血液样本,共260例,采用建立的方法检测其8个靶位点,并与测序结果比较。结果本方法检测260例样本结果显示:纯合子荧光强度中位值(median fluorescence intensity,MFI)比率均>0.9或<0.1,杂合子MFI比率均在0.3〜0.6之间;各基因型批内和批间变异系数分别低于6.4%和10.9%;所需DNA最低检测限为0.75ng;260例样本的检测结果与测序结果完全一致。结论本研究采用液相芯片技术,成功建立了快速检测华法林和氯吡格雷相关药物基因型的方法。展开更多
The genus Chenopodium comprises about 150 species, of which Chenopodium quinoa and C. album are important for their nutritional value. Evaluation of variation in qualitative morphological traits of plants and SNPs in ...The genus Chenopodium comprises about 150 species, of which Chenopodium quinoa and C. album are important for their nutritional value. Evaluation of variation in qualitative morphological traits of plants and SNPs in chloroplast rbc L and mat K gene sequences in 19 accessions representing C. quinoa and C. album indicated that the accessions IC-411824 and IC-411825,which have white seeds, belong to C. quinoa rather than C. album. This observation was also supported by a time tree that indicated IC-411824 and IC-411825 to be a sister clade to accessions of C. quinoa with an estimated age of 1.2 Mya. Whereas multiple alignments of rbc L gene sequences from the 19 accessions revealed 1.26% parsimony-informative sites with 0.68%interspecific sequence diversity, alignment of nucleotide sequences of amplicons representing the mat K gene revealed 4.97% parsimony-informative sites and 2.81% interspecific sequence diversity. Validation of SNPs in the cp rbc L and mat K regions of 36 accessions belonging to C. quinoa and C. album was performed by allele-specific PCR with primers carrying a single base change at the 3′ end. We report the first C. quinoa-specific SNP-based primer, R1RQ-AFR,designed from rbc L sequences, that could differentiate quinoa from 64 genera including13 species of the genus Chenopodium. With an estimated age of 10.5–4.1 million years(Myr), the Himalayan chenopods are evolutionarily younger than the Andean chenopods. The results establish the paraphyletic origin of the genus Chenopodium.展开更多
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
文摘目的基于液相芯片技术,建立一种可同时、快速检测细胞色素P4502C9(CytoChrome P4502C9,CYP2C 9)、CYP2C19、CYP4F2、维生素K环氧化物还原酶(vitamin K epoxide reductase,VKORCI)及ATP结合盒亚家族B成员l(ATP-binding cassette subfamily B memberl,ABCB1)等与华法林和氯吡格雷相关药物基因多态性的方法。方法方法学的建立。从Genbank中查找与华法林和氯吡格雷药物相关的8个靶位点附近基因序列,设计特异性引物和探针;通过多重PCR扩增,等位基因特异性引物延伸(allele specific primer extension,ASPE),MagPlex-Tag微球杂交,经液相芯片系统Luminex 200检测荧光信号,确定基因型;优化反应体系并进行方法学评价。收集2017年6月至2018年12月东莞市厚街医院抗血栓治疗患者血液样本,共260例,采用建立的方法检测其8个靶位点,并与测序结果比较。结果本方法检测260例样本结果显示:纯合子荧光强度中位值(median fluorescence intensity,MFI)比率均>0.9或<0.1,杂合子MFI比率均在0.3〜0.6之间;各基因型批内和批间变异系数分别低于6.4%和10.9%;所需DNA最低检测限为0.75ng;260例样本的检测结果与测序结果完全一致。结论本研究采用液相芯片技术,成功建立了快速检测华法林和氯吡格雷相关药物基因型的方法。
基金Financial support received from Department of Biotechnology,Government of India vide grant No.BT/PR-8953/BCE/08/533/2007project sanctioned against grant No.BT/04/NE/2009financial support from Department of Science&Technology,Government of India in the form of a research fellowship under the INSPIRE program
文摘The genus Chenopodium comprises about 150 species, of which Chenopodium quinoa and C. album are important for their nutritional value. Evaluation of variation in qualitative morphological traits of plants and SNPs in chloroplast rbc L and mat K gene sequences in 19 accessions representing C. quinoa and C. album indicated that the accessions IC-411824 and IC-411825,which have white seeds, belong to C. quinoa rather than C. album. This observation was also supported by a time tree that indicated IC-411824 and IC-411825 to be a sister clade to accessions of C. quinoa with an estimated age of 1.2 Mya. Whereas multiple alignments of rbc L gene sequences from the 19 accessions revealed 1.26% parsimony-informative sites with 0.68%interspecific sequence diversity, alignment of nucleotide sequences of amplicons representing the mat K gene revealed 4.97% parsimony-informative sites and 2.81% interspecific sequence diversity. Validation of SNPs in the cp rbc L and mat K regions of 36 accessions belonging to C. quinoa and C. album was performed by allele-specific PCR with primers carrying a single base change at the 3′ end. We report the first C. quinoa-specific SNP-based primer, R1RQ-AFR,designed from rbc L sequences, that could differentiate quinoa from 64 genera including13 species of the genus Chenopodium. With an estimated age of 10.5–4.1 million years(Myr), the Himalayan chenopods are evolutionarily younger than the Andean chenopods. The results establish the paraphyletic origin of the genus Chenopodium.
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.
