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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Hutchinson-Gilford progeria mutant lamin A primarily targets human vascular cells as detected by an anti-Lamin A G608G antibody
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Hutchinson-Gilford progeria mutant lamin A primarily targets human vascular cells as detected by an anti-Lamin A G608G antibody

机译:Hutchinson-Gilford早衰突变体Lamin A主要通过抗Lamin A G608G抗体检测到靶向人血管细胞

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摘要

Hutchinson-Gilford progeria syndrome (HGPS; Online Mendelian Inheritance in Man accession no. 176670) is a rare disorder that is characterized by segmental premature aging and death between 7 and 20 years of age from severe premature atherosclerosis. Mutations in the LMNA gene are responsible for this syndrome. Approximately 80% of HGPS cases are caused by a G608 (GGC→GGT) mutation within exon 11 of LMNA, which elicits a deletion of 50 aa near the C terminus of prelamin A. In this article, we present evidence that the mutant lamin A (progerin) accumulates in the nucleus in a cellular age-dependent manner. In human HGPS fibroblast cultures, we observed, concomitantly to nuclear progerin accumulation, severe nuclear envelope deformations and invaginations preventable by farnesyltransferase inhibition. Nuclear alterations affect cell-cycle progression and cell migration and elicit premature senescence. Strikingly, skin biopsy sections from a subject with HGPS showed that the truncated lamin A accumulates primarily in the nuclei of vascular cells. This finding suggests that accumulation of progerin is directly involved in vascular disease in progeria.
机译:Hutchinson-Gilford早衰综合症(HGPS;在线孟德尔遗传在线登录号176670)是一种罕见疾病,其特征是在严重的早发性动脉粥样硬化中出现节段性早衰并在7至20岁之间死亡。 LMNA基因突变是导致这种综合征的原因。大约80%的HGPS病例是由LMNA外显子11内的G608(GGC→GGT)突变引起的,该突变在前乳蛋白A的C末端附近缺失了50个氨基酸。在本文中,我们提供了证据证明突变型层粘蛋白A (progerin)以细胞年龄依赖性方式积累在细胞核中。在人类HGPS成纤维细胞培养物中,我们观察到核早老蛋白积累,严重的核被膜变形和法尼基转移酶抑制可预防的内陷。核改变影响细胞周期进程和细胞迁移并引起过早衰老。令人惊讶的是,来自患有HGPS的受试者的皮肤活检切片显示,截短的核纤层蛋白A主要积聚在血管细胞核中。该发现表明,早衰素的积累直接参与早衰的血管疾病。

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