RRC ID |
1290
|
著者 |
Wu CA, Tsujita M, Hayashi M, Yokoyama S.
|
タイトル |
Probucol inactivates ABCA1 in the plasma membrane with respect to its mediation of apolipoprotein binding and high density lipoprotein assembly and to its proteolytic degradation.
|
ジャーナル |
J Biol Chem
|
Abstract |
Probucol has been shown to inhibit the release of cellular lipid by helical apolipoprotein and thereby to reduce plasma high density lipoprotein. We attempted to explore the underlying mechanism for this effect in human fibroblast WI-38. Probucol inhibited the apoA-I-mediated cellular lipid release and binding of apoA-I to the cells in a dose-dependent manner. It did not influence cellular uptake of low density lipoprotein, transport of cholesterol to the cell surface whether de novo synthesized or delivered as low density lipoprotein, and overall cellular content of cholesterol, although biosynthesis of lipids from acetate was somewhat increased. Probucol did not affect the mRNA level of ABCA1, and ABCA1 was recovered along with marker proteins for plasma membrane regardless of the presence of probucol. However, the protein level of ABCA1 increased, and the rate of its decay in the presence of cycloheximide was slower in the probucol-treated cells. ABCA1 in the probucol-treated cells was resistant to digestion by calpain but not by trypsin. We concluded that probucol inactivates ABCA1 in the plasma membrane with respect to its function in mediating binding of and lipid release by apolipoprotein and with respect to proteolytic degradation by calpain.
|
巻・号 |
279(29)
|
ページ |
30168-74
|
公開日 |
2004-7-16
|
DOI |
10.1074/jbc.M403765200
|
PII |
S0021-9258(19)71029-1
|
PMID |
15140889
|
MeSH |
ATP Binding Cassette Transporter 1
ATP-Binding Cassette Transporters / chemistry
ATP-Binding Cassette Transporters / metabolism*
Anticholesteremic Agents / pharmacology*
Apolipoproteins / metabolism*
Blotting, Western
Calpain / metabolism
Cell Membrane / metabolism*
Cholesterol / metabolism
Cholesterol Oxidase / metabolism
Dose-Response Relationship, Drug
Fibroblasts / metabolism
Humans
Lipid Metabolism
Lipoproteins, HDL / metabolism
Lipoproteins, LDL / metabolism
Probucol / pharmacology*
Protein Binding
RNA / metabolism
RNA, Messenger / metabolism
Reverse Transcriptase Polymerase Chain Reaction
Subcellular Fractions / metabolism
Time Factors
Transcription, Genetic
Trypsin / pharmacology
|
IF |
4.238
|
引用数 |
75
|
WOS 分野
|
BIOCHEMISTRY & MOLECULAR BIOLOGY
|
リソース情報 |
ヒト・動物細胞 |
WI-38 |