共查询到20条相似文献,搜索用时 15 毫秒
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Ringpfeil F Raus A DiGiovanna JJ Korge B Harth W Mazzanti C Uitto J Bale SJ Richard G 《Experimental dermatology》2001,10(1):19-27
Darier disease (DD) is with a frequency of up to 1 in 36,000 a relatively common genodermatosis with autosomal dominant inheritance and late age of onset. The progressive skin manifestations are variable, but often debilitating and disfiguring, and may be associated with a wide range of neuropsychiatric problems, such as epilepsy and depression. On histology, acantholysis and dyskeratosis are prominent findings, implicating impaired functionality of desmosomes. Recently, mutations in the ATP2A2 gene encoding SERCA2, a calcium pump of the endo/sacrcoplasmic reticulum, have been identified as the molecular basis of DD. This slow-twitched calcium ATPase has two splice variants, one of which is highly expressed in epidermis, and maintains low intracellular calcium levels by facilitating transport of cytosolic calcium into the endoplasmic reticulum. Thus, it may confer a direct effect on the established calcium-dependent assembly of desmosomes. We screened ATP2A2 in a cohort of 24 DD families using conformation sensitive gel electrophoresis and direct sequencing, and detected 14 distinct mutations, 9 of which were novel. The mutational spectrum included 9 missense mutations, 1 nonsense mutation, 3 small in-frame deletions, and a 19-basepair insertion. Mutations were scattered over the entire gene with a slight preponderance in the first 8 exons, and affected exclusively residues conserved among all SERCAs. In addition, we found 2 silent polymorphisms, 1 of which occurred in 4 unrelated families. Comparison of molecular data and phenotypic features, such as severity and type of disease, occurrence of mucosal involvement, or association with neuropsychiatric disorders, did not reveal an obvious genotype-phenotype correlation in our cohort. 相似文献
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目的:检测2例散发及2个家系毛囊角化病患者ATP2A2基因的突变。方法:采用聚合酶链反应扩增患者和健康对照个体ATP2A2基因的全部外显子,并进行DNA测序,检测该基因突变。结果:共发现1个新的点突变(TVS11+32 C→T)和2个已发现的错义突变(R131Q,N767S)。结论:毛囊角化病具有遗传异质性。 相似文献
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Mosaicism for ATP2A2 mutations causes segmental Darier's disease 总被引:4,自引:0,他引:4
Sakuntabhai A Dhitavat J Burge S Hovnanian A 《The Journal of investigative dermatology》2000,115(6):1144-1147
Epidermal naevi are localized malformations of the epidermis consisting of verrucoid scaly papules and plaques following Blaschko's lines. Genetic mosaicism has been proposed to underlie the development of linear epidermal naevi. Rarely, epidermal naevi show acantholytic histology similar to Darier's disease, a dominantly inherited skin condition characterized by widespread warty papules. As patients with acantholytic dyskeratotic naevi often give a history of worsening after sun exposure and the lesions are typical of Darier's disease, numerous authors have proposed that these patients have segmental Darier's disease. The postulated relationship has not been proven, however. Recently, we identified ATP2A2, which encodes the sarco/endoplasmic reticulum Ca(2+) ATPase isoform 2 as the defective gene in Darier's disease. In this report, we investigated the involvement of ATP2A2 in acantholytic dyskeratotic naevi following Blaschko's lines in two patients. We identified a nonsense mutation (Y894X) in the first patient and a nonconservative glycine to arginine mutation at codon 769 (G769R) in the other patient. These mutations were present in affected skin, and were not detected in unaffected skin or in leukocytes. We conclude that acantholytic dyskeratotic naevi can arise from a somatic mutation in ATP2A2. These individuals are mosaics for the mutation, but the risk of transmission of generalized Darier's disease will depend on whether the germline is affected. Our findings provide further evidence that Blaschko's lines do reflect genetic mosaicism and that the term acantholytic dyskeratotic naevus might be replaced in the future by segmental Darier's disease induced by postzygotic mosaicism. J Invest Dermatol 115:1144-1147 2000 相似文献
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一毛囊角化病家系ATP2A2基因突变检测 总被引:3,自引:0,他引:3
目的:检测一毛囊角化病家系的ATP2A2基因突变。方法:提取2例患者外周血DNA,采用聚合酶链式反应及DNA直接测序方法,检测患者ATP2A2基因突变。结果:该家系患者及其两女儿存在ATP2A2基因的碱基缺失突变,即ATP2A2基因第10个外显子1220位开始缺失了AA 2个碱基。而该家系中其他正常者未发现此突变。结论:ATP2A2基因第10个外显子1220delAA突变可能与该家系患者临床表型有关。 相似文献
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毛囊角化病ATP2A2基因突变分析 总被引:1,自引:1,他引:0
目的检测毛囊角化病患者ATP2A2基因的突变。方法提取全部患者及健康对照个体的外周血DNA,采用聚合酶链反应扩增ATP2A2基因的全部外显子,并进行DNA测序。结果在收集到的2个家系和3例散发患者中共发现3个突变,包括1个缺失突变(1622delAACA),1个插入突变(180insCTTAA)和1个错义突变(698GT),均为未见报道的突变。在100例正常对照中均未发现上述突变。结论收集到的毛囊角化病患者存在ATP2A2基因的突变,这些突变可能会影响角质形成细胞中钙离子的转运,使表皮细胞的连接和分化出现异常。 相似文献
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Takahashi H Atsuta Y Sato K Ishida-Yamamoto A Suzuki H Iizuka H 《Journal of dermatological science》2001,26(3):169-172
Darier's disease (DD) is a rare, dominantly inherited skin disorder with abnormal keratinization and acantholysis. Recently, mutations of ATP2A2 encoding the sarco/endoplasmic reticulum Ca(2+)-ATPase type 2 isoform (SERCA2) have been reported in Caucasian DD families. In the present study, we examined the ATP2A2 gene mutations of three sporadic (AS1,AS3,AS4) and one familial (AS2) Japanese DD patients. Sequence analysis revealed that the patients had novel mutations, one nonsense mutation (AS1 (C613X)) and three single base changes leading to amino acid substitutions (AS2 (L321F), AS3 (I274V), and AS4 (M719I)). These results demonstrate that distinct ATP2A2 gene mutations are present in Japanese DD patients. 相似文献
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Jia Huo Yan Liu Junhong Ma Shengxiang Xiao 《Archives of dermatological research》2010,302(10):769-772
Darier disease (DD; OMIM 124200) is a rare, autosomal dominant hereditary skin disorder characterized by abnormal keratinization and acantholysis. The causes of DD are defects in the ATP2A2 gene, which encodes the sarco/endoplasmic reticulum Ca2+ ATPase isoform 2 (SERCA2). The aim of this study was to report a novel splice-site mutation and to examine the relative quantity expression of ATP2A2 gene in a Chinese family with DD. Polymerase chain reaction (PCR) was carried out to amplify the exons and flanking intron boundaries of the ATP2A2 gene followed by direct sequencing. A novel splice-site mutation (IVS20-6T>A) was found in the family, which was confirmed by creating a novel HinfI (NEB Inc) recognition site and RT-PCR. Real-time quantitative PCR showed approximately 53 and 52% reduction of ATP2A2 expression of the proband and his father, respectively. The results support the proposition that haploinsufficiency is a common mechanism for the dominant inheritance of DD. 相似文献
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Elaine K. Green Katherine Gordon‐Smith Susan M. Burge Detelina Grozeva Colin S. Munro Sherine Tavadia Lisa Jones Nicholoas Craddock 《The Journal of dermatology》2013,40(4):259-266
Darier disease (DD) is a rare autosomal dominantly inherited skin disorder caused by mutations in ATP2A2, which is expressed in both the skin and the brain and encodes for SERCA2. We have screened the coding regions of ATP2A2 in a total of 95 unrelated individuals with DD to identify the pathogenic mutations. We identified 66 potentially pathogenic mutations in ATP2A2 for 74 of the 95 individuals with DD of which 45 (68%) are thought to be novel. Forty‐nine (74%) are unique to an individual and 17 (26%) were found in more than one individual or overlap with previously identified variants. The results suggest that mutations in ATP2A2 may not be as family‐specific as first thought. The spectrum of mutations identified will inform understanding of the pathogenesis of DD. 相似文献
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BACKGROUND: Darier's disease (DD) is an autosomal dominant skin disorder characterized by abnormal keratinization and acantholysis. Pathogenic mutations in the ATP2A2 gene encoding SERCA2, a calcium pump of the sarco/endoplasmic reticulum, have recently been identified. OBJECTIVES: To identify mutations of the ATP2A2 gene in Taiwanese patients with DD. METHODS: Mutation analysis of genomic DNA was performed on five families with DD and two sporadic cases. All 21 exons and the flanking intron boundaries were amplified and followed by direct sequencing. Restriction fragment analysis or direct sequencing in each family and in normal controls further verified the mutations. RESULTS: Mutations in the functional domains of the ATP2A2 gene were identified and verified in all seven pedigrees. They consisted of four mis-sense mutations (R131Q, P680L, G703S, G807R), one altered splice-site mutation (2980 + 5insA) and one frameshift deletion mutation (1457-1458delAG). Of these, R131Q, which was reported twice previously, was detected in two unrelated families. The remaining five were novel mutations. CONCLUSIONS: Six pathogenic mutations in the ATP2A2 gene were identified in seven Taiwanese DD pedigrees. The results confirmed that most mutations in the ATP2A2 gene are private and of the mis-sense type. 相似文献