Maternal uniparental meroisodisomy in the LAMB3 region of chromosome 1 results in lethal junctional epidermolysis bullosa.

Maternal uniparental meroisodisomy in the LAMB3 region of chromosome 1 results in lethal junctional epidermolysis bullosa.
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1 号染色体 LAMB3 区域的母体单亲子二倍体导致致命的交界性大疱性表皮松解症。

DOI:
10.1046/j.1523-1747.1998.00186.x
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发表时间:
1998
期刊:
The Journal of investigative dermatology.
影响因子:
--
通讯作者:
Uitto,J
Uitto,J
中科院分区:
--
文献类型:
--
作者:
Takizawa,Y;Pulkkinen,L;Shimizu,H;Lin,L;Hagiwara,S;Nishikawa,T;Uitto,J

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赫利茨交界性大疱性表皮病(OMIM#226700)是一种致死性常染色体隐性遗传性水疱病,由编码层粘连蛋白5组成性多肽亚基的三种基因LAMA 3、LAMB 3或LAMC 2之一突变引起。在这项研究中,我们描述了一个病人纯合子的一种新的无义突变Q936 X在外显子19的LAMB 3,这已被定位到染色体1 q32。患者出生时有广泛的水疱,层粘连蛋白5免疫荧光染色呈阴性,透射电子显微镜检查显示真皮-表皮交界处的透明层内组织分离,诊断为Herlitz交界性大疱性表皮病。先证者的母亲被发现是这种突变的杂合子携带者,而父亲仅表现出野生型LAMB 3等位基因。用6条染色体上的13个微卫星标记排除了非亲性。使用跨越1号染色体的28个微卫星标记进行的基因型分析显示,该患者在1号染色体的两个区域内具有母体原发性异二体性,以及部分异二体性,一个在1 p上,另一个在1 q上,后一个区域包含母体LAMB 3突变。这些结果表明,该患者的Herlitz交界性大疱性表皮病是由于染色体1 q32上的母体LAMB 3突变降低至纯合性所致。
Herlitz junctional epidermolysis bullosa (OMIM#226700) is a lethal, autosomal recessive blistering disorder caused by mutations in one of the three genes LAMA3, LAMB3, or LAMC2, encoding the constitutive polypeptide subunits of laminin 5. In this study, we describe a patient homozygous for a novel nonsense mutation Q936X in exon 19 of LAMB3, which has been mapped to chromosome 1q32. The patient was born with extensive blistering and demonstrated negative immunofluorescence staining for laminin 5, and transmission electron microscopy revealed tissue separation within lamina lucida of the dermal–epidermal junction, diagnostic of Herlitz junctional epidermolysis bullosa. The mother of the proband was found to be a heterozygous carrier for this mutation, whereas the father demonstrated the wild-type LAMB3 allele only. Nonpaternity was excluded by 13 microsatellite markers in six different chromosomes. Genotype analysis using 28 microsatellite markers spanning chromosome 1 revealed that the patient had maternal primary heterodisomy, as well as meroisodisomy within two regions of chromosome 1, one on 1p and the other one on 1q, the latter region containing the maternal LAMB3 mutation. These results suggest that Herlitz junctional epidermolysis bullosa in this patient developed as a result of reduction to homozygosity of the maternal LAMB3 mutation on chromosome 1q32.
DOI: 10.1002/ajmg.1320460613
发表时间: 1993-07-01
期刊: AMERICAN JOURNAL OF MEDICAL GENETICS
影响因子: --
作者:
ENGEL, E
通讯作者: ENGEL, E
大疱性表皮松解症:由分子异质性解释的一系列临床表型。
DOI: 10.1016/s1357-4310(97)01112-x
发表时间: 1997
期刊: Molecular medicine today
影响因子: --
作者:
Uitto,J;Pulkkinen,L;McLean,WH
通讯作者: McLean,WH
两个日本无亲缘关系的 Herlitz 交界性大疱性表皮松解症家族共有的 LAMB3 基因的新突变及其在产前检测中的应用。
DOI: 10.1046/j.1523-1747.1998.00105.x
发表时间: 1998
期刊: The Journal of investigative dermatology.
影响因子: --
作者:
Takizawa,Y;Shimizu,H;Pulkkinen,L;Hiraoka,Y;McGrath,JA;Suzumori,K;Aiso,S;Uitto,J;Nishikawa,T
通讯作者: Nishikawa,T
19-DEJ-1 是半桥粒锚定丝复合物的单克隆抗体,是用于所有主要形式的交界性大疱性表皮松解症的唯一可靠的免疫组织化学探针。
DOI: --
发表时间: 1990
影响因子: --
作者:
Fine,JD
通讯作者: Fine,JD