Pachyonychia congenital (PC), consist of a group of rare autosomal-dominant ectodermal disorders. Symmetrically thickened, dystrophic fingernails and toenails are the defining characteristic of pachyonychia congenita....Pachyonychia congenital (PC), consist of a group of rare autosomal-dominant ectodermal disorders. Symmetrically thickened, dystrophic fingernails and toenails are the defining characteristic of pachyonychia congenita. There are two main clinical subtypes of pachyonychia congenita: Pachyonychia congenita-1 and pachyonychia congenita-2. Pachyonychia congenita-U is another subtypes of pachyonychia congenita, where either a mutation has not been found or has not been investigated. Objectives: The present aim was to indentify the mutation of keratin 6a or keratin 16 gene in the pachyonychia congenita patient. Methods: The proband, her parents and 100 unrelated controls were subjected to mutation detection in keratin 6a or keratin 16 gene. Direct sequencing of all PCR products of the whole coding regions of keratin 6a or keratin 16 was performed to identify the mutation. Results: No mutation was found in keratin 6a or keratin 16 in the proband, her parents, and 100 unrelated and unaffected people. Conclusion: This study reported a Chinese female affected with pachyonychia congenita-1 without mutation in keratin gene.展开更多
Here we report a family with a clinical spectrum of Pachyonychia Congenita Tarda (PCT) encompassing two generations via a balanced chromosomal translocation between 4q26 and 12p12.3. We discuss the effects of chromoso...Here we report a family with a clinical spectrum of Pachyonychia Congenita Tarda (PCT) encompassing two generations via a balanced chromosomal translocation between 4q26 and 12p12.3. We discuss the effects of chromosomal translocations on gene expression through involved breakpoints and structural gene abnormalities detected by array CGH. We believe that the family we present gives further insight to the better understanding of molecular and structural basis of keratin disorders, and to the late onset and genetic basis of PCT through the possible role of C-type lectins and human epithelial membrane protein1 (EMP1). Better understanding of the molecular basis of keratin disorders is the foundation for improved diagnosis, genetic counseling and novel therapeutic approaches to overcome the current treatment limitations related to this disease.展开更多
目的:研究先天性厚甲症Ⅰ型(Pachyonychia congenita type 1,PC-1)一家系K6a基因突变。方法:提取PC-1患者和100名正常对照的外周血白细胞基因组DNA,采取长片段聚合酶链反应(PCR)扩增基因的全部编码序列,然后以产物为模板,采用巢式PCR扩...目的:研究先天性厚甲症Ⅰ型(Pachyonychia congenita type 1,PC-1)一家系K6a基因突变。方法:提取PC-1患者和100名正常对照的外周血白细胞基因组DNA,采取长片段聚合酶链反应(PCR)扩增基因的全部编码序列,然后以产物为模板,采用巢式PCR扩增突变热点区,最后通过DNA直接测序确定基因突变位点和类型。结果:DNA测序发现患者K6a基因第1403位核甘酸由胸腺嘧啶(T)变为腺嘌呤(A),导致K6a的2B螺旋区末端第468位密码子由亮氨酸(L)变为谷氨酰胺(Q)。而该家系中的正常人及100名正常对照均未发现此突变。结论:该患者存在角蛋白K6a L468Q突变,进一步证明了螺旋边界序列是角蛋白K6a基因的突变热点区。展开更多
文摘Pachyonychia congenital (PC), consist of a group of rare autosomal-dominant ectodermal disorders. Symmetrically thickened, dystrophic fingernails and toenails are the defining characteristic of pachyonychia congenita. There are two main clinical subtypes of pachyonychia congenita: Pachyonychia congenita-1 and pachyonychia congenita-2. Pachyonychia congenita-U is another subtypes of pachyonychia congenita, where either a mutation has not been found or has not been investigated. Objectives: The present aim was to indentify the mutation of keratin 6a or keratin 16 gene in the pachyonychia congenita patient. Methods: The proband, her parents and 100 unrelated controls were subjected to mutation detection in keratin 6a or keratin 16 gene. Direct sequencing of all PCR products of the whole coding regions of keratin 6a or keratin 16 was performed to identify the mutation. Results: No mutation was found in keratin 6a or keratin 16 in the proband, her parents, and 100 unrelated and unaffected people. Conclusion: This study reported a Chinese female affected with pachyonychia congenita-1 without mutation in keratin gene.
文摘Here we report a family with a clinical spectrum of Pachyonychia Congenita Tarda (PCT) encompassing two generations via a balanced chromosomal translocation between 4q26 and 12p12.3. We discuss the effects of chromosomal translocations on gene expression through involved breakpoints and structural gene abnormalities detected by array CGH. We believe that the family we present gives further insight to the better understanding of molecular and structural basis of keratin disorders, and to the late onset and genetic basis of PCT through the possible role of C-type lectins and human epithelial membrane protein1 (EMP1). Better understanding of the molecular basis of keratin disorders is the foundation for improved diagnosis, genetic counseling and novel therapeutic approaches to overcome the current treatment limitations related to this disease.
文摘目的:研究先天性厚甲症Ⅰ型(Pachyonychia congenita type 1,PC-1)一家系K6a基因突变。方法:提取PC-1患者和100名正常对照的外周血白细胞基因组DNA,采取长片段聚合酶链反应(PCR)扩增基因的全部编码序列,然后以产物为模板,采用巢式PCR扩增突变热点区,最后通过DNA直接测序确定基因突变位点和类型。结果:DNA测序发现患者K6a基因第1403位核甘酸由胸腺嘧啶(T)变为腺嘌呤(A),导致K6a的2B螺旋区末端第468位密码子由亮氨酸(L)变为谷氨酰胺(Q)。而该家系中的正常人及100名正常对照均未发现此突变。结论:该患者存在角蛋白K6a L468Q突变,进一步证明了螺旋边界序列是角蛋白K6a基因的突变热点区。
