| RRC ID |
1507
|
| 著者 |
Zhang Z, Hirano K, Tsukamoto K, Ikegami C, Koseki M, Saijo K, Ohno T, Sakai N, Hiraoka H, Shimomura I, Yamashita S.
|
| タイトル |
Defective cholesterol efflux in Werner syndrome fibroblasts and its phenotypic correction by Cdc42, a RhoGTPase.
|
| ジャーナル |
Exp Gerontol
|
| Abstract |
Werner syndrome (WS) is characterized by the early onset of senescent phenotypes including premature atherosclerotic cardiovascular diseases, although the underlying molecular mechanism for atherosclerosis has not been fully understood yet. Cholesterol efflux from the cells is the initial step of reverse cholesterol transport, a major protective system against atherosclerosis. The aim of the present study was to determine whether this crucial step may be altered in WS. We examined intracellular lipid transport and cholesterol efflux and the expression levels of its related molecules in skin fibroblasts obtained from patients with WS. Cholesterol efflux was markedly reduced in the WS fibroblasts in association with increased cellular cholesterol. Fluorescent recovery after photobleaching (FRAP) technique revealed that intracellular lipid transport around Golgi apparatus was markedly reduced when using a C6-NBD-Ceramide as a tracer. Cdc42 protein and its GTP-bound form were markedly reduced in the WS fibroblasts. The complementation of wild-type Cdc42 corrected cholesterol efflux, intracellular lipid transport, and cellular cholesterol levels in the WS fibroblasts. These data indicated that the reduced expression of Cdc42 may be responsible for the abnormal lipid transport, which in turn might be related to the cardiovascular manifestations in WS.
|
| 巻・号 |
40(4)
|
| ページ |
286-94
|
| 公開日 |
2005-4-1
|
| DOI |
10.1016/j.exger.2005.01.011
|
| PII |
S0531-5565(05)00012-4
|
| PMID |
15820609
|
| MeSH |
Adenoviridae / genetics
Adult
Arteriosclerosis / metabolism
Biological Transport
Cell Line
Cholesterol / metabolism*
Female
Fibroblasts / metabolism*
Genetic Vectors
Humans
Lipid Metabolism
Middle Aged
Werner Syndrome / metabolism*
cdc42 GTP-Binding Protein / genetics
cdc42 GTP-Binding Protein / metabolism*
cdc42 GTP-Binding Protein / physiology
|
| IF |
3.376
|
| 引用数 |
9
|
|
WOS 分野
|
GERIATRICS & GERONTOLOGY
|
| リソース情報 |
| ヒト・動物細胞 |
WS3RGB(GMC0007)
WS6RGB(GMC0009) |
