毛囊角化病ATP2A2基因突变的检测

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。     

毛囊角化病一家系中ATP2A2基因新的剪接突变

目的: 检测毛囊角化病一家系中ATP2A2基因新的剪接突变。方法: 提取家系中2例患者和2名正常人外周血DNA,采取聚合酶链反应技术对ATP2A2基因进行扩增,并对其产物进行测序,以100名正常人作对照。结果:该家系中患者ATP2A2基因的第13号内含子第1761+2位碱基由胸腺嘧啶(T)转化为胞嘧啶(C)。结论: 该家系发病可能是由ATP2A2基因发生剪接突变所致。     

一毛囊角化病家系ATP2A2基因突变检测

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。     

一毛囊角化病家系ATP2A2基因突变的检测

目的 检测一毛囊角化病家系中ATP2A2基因的突变。方法 1例经组织病理结合临床诊断为毛囊角化病,采用聚合酶链反应和DNA测序方法对此家系进行基因突变情况检测。结果 家系中患者在ATP2A2上第1541位腺嘌呤A变为鸟嘌呤G,使编码ATP酶结合域第514位氨基酸由赖氨酸变为精氨酸,家系中未患病者及对照的健康人均不存在此突变。结论 K514R是引起该家系临床病变的一个新的特异突变,不是多态性变化。     

毛囊角化病ATP2A2基因突变分析

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。     

毛囊角化病一家系及三例散发患者ATP2A2基因突变研究

目的：对毛囊角化病（Darier's disease, DD）一家系及三例散发患者进行ATP2A2基因的突变分析。方法：收集先证者及其家系成员、散发病例的临床资料和外周血,采用PCR技术扩增ATP2A2基因所有编码区及侧翼序列,用Sanger法测序检测潜在的突变,选取与患者无亲缘关系的100例健康人作为对照,同时对已报道的ATP2A2基因突变进行文献回顾。结果：家系中三例患者均检测出ATP2A2基因第5号外显子c.380 G>A(p.G127D)新发错义突变;散发患者S1检测出第13号外显子C.1676G>A(p.R559Q)错义突变,散发患者S2检测出第14号外显子c. 2001C>T(p.D667D)同义突变,散发患者S3未检测出突变。结论：本研究中共发现三个突变,其中c.380G>A(p.G127D)在中国人群中首次报道,拓展了ATP2A2的基因突变谱。     

毛囊角化病九例ATP2A2基因突变研究

目的:检测9例毛囊角化病(Darier's disease,DD)患者的基因突变.方法:提取1家系中2例患者、7例散发患者及100名正常对照外周血基因组DNA,用Sanger测序检测9例DD患者ATP2A2的致病突变.对不携带ATP2A2突变的患者,应用全外显子组测序(WES)寻找可能导致该疾病的其他变异.364名健康...     

毛囊角化病ATP2A2基因突变二例及家系调查

【摘要】 例1男,16岁,面部、颈部及双腋下见密集褐色毛囊角化性丘疹,部分融合成斑块,局部可见疣状增生;母亲与其有相似的病史及临床表现。例2男,21岁,头面部、颈部、躯干、双腋下及臀部见弥漫性毛囊角化性丘疹,部分融合成片,局部可见疣状增生;家族成员均无类似症状。例2颈部皮损组织病理：表皮角化过度伴灶状角化不全,棘层部分区域棘刺松解并有腔隙形成,可见绒毛、圆体和谷粒细胞,真皮浅层炎症细胞浸润。2例患者及其父母基因检测：例1及母亲ATP2A2基因存在第15外显子c.2300A>G错义突变;例2第15外显子与第15内含子交界处存在c.2097+5G>A 剪切区域突变。2例患者其他家族成员未见上述突变。     

毛囊角化病合并疣状肢端角化症二例临床及基因检测分析

报道2例毛囊角化病合并疣状肢端角化症并复习相关文献。两例患者临床均表现为手足多发疣状丘疹,都有明确家族史。对两例患者行基因检测均发现了ATP2A2的异常突变。经过文献复习后发现毛囊角化病与疣状肢端角化症两者之间的关系不能明确,需要进一步遗传学研究。     

Darier病ATP2A2基因A68E突变的定点诱变及其突变载体构建

目的利用大引物PCR技术对发现的中国人Darier病ATP2A2基因A68E突变进行体外定点诱变,并构建携带有突变基因的真核表达载体。方法首先设计三条引物(包括两条外侧正向和反向引物以及内部突变引物),通过2轮PCR扩增,扩增出含有所需突变位点的片段(ATP2A2-A68E),然后将突变片段克隆入pGEM-T载体中,通过双酶切后进行连接,将目的片段重组至真核表达载体pcDNA3.1中。结果用大引物PCR法成功构建ATP2A2基因A68E突变片段,测序结果显示了ATP2A2基因上203位碱基C已变为A,此突变导致ATP2A2基因第68位密码子由丙氨酸变为谷氨酸。结论 pcDNA3.1-ATP2A2-A68E突变体的成功构建,为进一步进行该突变体的结构与功能的研究奠定了基础。     

A novel splice-site mutation of ATP2A2 gene in a Chinese family with Darier disease

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.     

The ATP2A2 gene in patients with Darier's disease: one novel splicing mutation

Background Darier’s disease (DD) is a rare, inherited skin disorder characterized by warty papules and plaques over the seborrheic area, such as central trunk, flexures, scalp, and forehead. Mutations in ATP2A2 gene encoding the enzyme sarco/endoplasmic reticulum Ca²⁺ATPase type 2 are responsible for the disease. Here we report two Chinese families affected by DD with two ATP2A2 mutations. Materials and methods DNA was extracted from the peripheral blood samples and then subjected to polymerase chain reaction amplification and direct automated DNA sequencing. Results A heterozygous G to T transition in the first nucleotide of intron 7 (c.630 + 1G > T) and G to A transversion at nucleotide 2898 in exon 20 of the ATP2A2 gene were identified in two pedigrees, respectively. The former mutation in the splice site is a novel mutation and is thought to lead to aberrant splicing and premature protein truncation. The latter has already been described, which leads to premature termination codons (PTC) (W966X). Conclusion The results will contribute to the expanding database of ATP2A2 mutations in patients with DD and be useful for inherited counseling and prenatal examination for affected families.