应用多聚酶链反应(PCR)和荧光原位杂交(FISH)方法对3例X-连锁隐性鱼鳞病(XLRI)患者进行分子诊断。对2个X-连锁隐性鱼鳞病家系3例患者及家族成员采集外周血标本后,先采用PCR扩增STS基因的两末端序列及侧翼的微卫星标记;再应用c DNA STS...应用多聚酶链反应(PCR)和荧光原位杂交(FISH)方法对3例X-连锁隐性鱼鳞病(XLRI)患者进行分子诊断。对2个X-连锁隐性鱼鳞病家系3例患者及家族成员采集外周血标本后,先采用PCR扩增STS基因的两末端序列及侧翼的微卫星标记;再应用c DNA STS基因特异性探针对间期白细胞核进行FISH检测。选取X染色体上自DXS1139至DXF22S1区域内7个微卫星标记进行PCR扩增以确定DNA缺失大小。PCR检测STS基因两端序列结果没有扩增产物。FISH方法也证实了患者STS基因DNA序列存在缺失。应用多态性微卫星序列进行PCR扩增,结果表明患者存在X染色体上STS基因及其侧翼序列,自DXS1139至DXF22S1区域内,DNA缺失达1.97 Mb。PCR和FISH方法证实XLRI患者STS基因及其两侧翼序列DNA缺失,具有重要的遗传咨询意义。展开更多
To investigate the gene mutation in a pedigree with X-linked iehthyosis （XLI） and to explore the relationship between the mutation and its clinical manifestations, genomic DNA of affected members, the normal member ...To investigate the gene mutation in a pedigree with X-linked iehthyosis （XLI） and to explore the relationship between the mutation and its clinical manifestations, genomic DNA of affected members, the normal member of the pedigree and 50 unrelated normal members was extracted with a whole blood genomie DNA extraction kit and the DNA was used as a template for the polymerase chain reaction （PCR） mediated amplification of exon 1 and exon 10 of the STS gene. hHb6 （human hair basic keratin） gene was used as the internal control. Our results showed that the STS gene was deleted in affected members in the pedigree with X-linked ichthyosis. The normal member of the pedigree and 50 unrelated normal members had no such deletion. The proband and his mother had products in the internal control after PCR amplification. The blank control had no product. It is concluded that deletion of the STS gene existed in this pedigree with X-linked iehthyosis, and it is responsible for the unique skin lesions of X-linked ichthyosis.展开更多
In the present review, we describe the most importantaspects of the X-linked ichthyosis(XLI) and make a compilation of the some historic details of the disease. The aim of the present study is an update of the XLI. Hi...In the present review, we describe the most importantaspects of the X-linked ichthyosis(XLI) and make a compilation of the some historic details of the disease. The aim of the present study is an update of the XLI. Historical, clinical, epidemiological, and molecular aspects are described through the text. Recessive XLI is a relatively common genodermatosis affecting different ethnic groups. With a high spectrum of the clinical manifestations due to environmental factors, the disease has a genetic heterogeneity that goes from a point mutation to a large deletion involving several genes to produce a contiguous gene syndrome. Most XLI patients harbor complete STS gene deletion and flanked sequences; seven intragenic deletions and 14 point mutations with a complete loss of the steroid sulfatase activity have been reported worldwide. In this study, we review current knowledge about the disease.展开更多
Several nuclear genes have been found to be linked to ichthyosis, and Next Generation Sequencing approach on panels of targeted genes has turned out to be particularly useful in analyzing diseases characterized by sig...Several nuclear genes have been found to be linked to ichthyosis, and Next Generation Sequencing approach on panels of targeted genes has turned out to be particularly useful in analyzing diseases characterized by significant genetic and phenotypic heterogeneity. We developed a panel of 26 genes to be screened with the Ion Personal Genome Machine (PGM) for causative mutations relating to ichthyosis. Sequencing runs were obtained from a patient with ichthyosis using the Ion Torrent PGM and then processed with Ion Torrent Suite, Variant Caller, Coverage Analysis and wANNOVER tools. No causative mutations were found using Variant Caller and wANNOVER softwares, whereas the “Coverage Analysis” tool revealed a common large deletion in STS gene in a patient with X-linked ichthyosis. Identification of indels in Next Generation Sequencing (NGS) data is a veritable challenge. This study demonstrates the efficacy and effectiveness of using NGS approach to detect large deletions without resorting to specific algorithms for “indel” detection. Our results indicate that the NGS panel is a useful, rapid and cost-effective screening test for patients whose features are suggestive of a genetic etiology involving one of the genes embedded in the panel. It is an excellent alternative to Sanger sequencing as for costs, ease of analysis, and turnaround time.展开更多
文摘应用多聚酶链反应(PCR)和荧光原位杂交(FISH)方法对3例X-连锁隐性鱼鳞病(XLRI)患者进行分子诊断。对2个X-连锁隐性鱼鳞病家系3例患者及家族成员采集外周血标本后,先采用PCR扩增STS基因的两末端序列及侧翼的微卫星标记;再应用c DNA STS基因特异性探针对间期白细胞核进行FISH检测。选取X染色体上自DXS1139至DXF22S1区域内7个微卫星标记进行PCR扩增以确定DNA缺失大小。PCR检测STS基因两端序列结果没有扩增产物。FISH方法也证实了患者STS基因DNA序列存在缺失。应用多态性微卫星序列进行PCR扩增,结果表明患者存在X染色体上STS基因及其侧翼序列,自DXS1139至DXF22S1区域内,DNA缺失达1.97 Mb。PCR和FISH方法证实XLRI患者STS基因及其两侧翼序列DNA缺失,具有重要的遗传咨询意义。
文摘To investigate the gene mutation in a pedigree with X-linked iehthyosis （XLI） and to explore the relationship between the mutation and its clinical manifestations, genomic DNA of affected members, the normal member of the pedigree and 50 unrelated normal members was extracted with a whole blood genomie DNA extraction kit and the DNA was used as a template for the polymerase chain reaction （PCR） mediated amplification of exon 1 and exon 10 of the STS gene. hHb6 （human hair basic keratin） gene was used as the internal control. Our results showed that the STS gene was deleted in affected members in the pedigree with X-linked ichthyosis. The normal member of the pedigree and 50 unrelated normal members had no such deletion. The proband and his mother had products in the internal control after PCR amplification. The blank control had no product. It is concluded that deletion of the STS gene existed in this pedigree with X-linked iehthyosis, and it is responsible for the unique skin lesions of X-linked ichthyosis.
文摘In the present review, we describe the most importantaspects of the X-linked ichthyosis(XLI) and make a compilation of the some historic details of the disease. The aim of the present study is an update of the XLI. Historical, clinical, epidemiological, and molecular aspects are described through the text. Recessive XLI is a relatively common genodermatosis affecting different ethnic groups. With a high spectrum of the clinical manifestations due to environmental factors, the disease has a genetic heterogeneity that goes from a point mutation to a large deletion involving several genes to produce a contiguous gene syndrome. Most XLI patients harbor complete STS gene deletion and flanked sequences; seven intragenic deletions and 14 point mutations with a complete loss of the steroid sulfatase activity have been reported worldwide. In this study, we review current knowledge about the disease.
文摘Several nuclear genes have been found to be linked to ichthyosis, and Next Generation Sequencing approach on panels of targeted genes has turned out to be particularly useful in analyzing diseases characterized by significant genetic and phenotypic heterogeneity. We developed a panel of 26 genes to be screened with the Ion Personal Genome Machine (PGM) for causative mutations relating to ichthyosis. Sequencing runs were obtained from a patient with ichthyosis using the Ion Torrent PGM and then processed with Ion Torrent Suite, Variant Caller, Coverage Analysis and wANNOVER tools. No causative mutations were found using Variant Caller and wANNOVER softwares, whereas the “Coverage Analysis” tool revealed a common large deletion in STS gene in a patient with X-linked ichthyosis. Identification of indels in Next Generation Sequencing (NGS) data is a veritable challenge. This study demonstrates the efficacy and effectiveness of using NGS approach to detect large deletions without resorting to specific algorithms for “indel” detection. Our results indicate that the NGS panel is a useful, rapid and cost-effective screening test for patients whose features are suggestive of a genetic etiology involving one of the genes embedded in the panel. It is an excellent alternative to Sanger sequencing as for costs, ease of analysis, and turnaround time.
