| RRC ID |
39896
|
| 著者 |
Fujita T, Izumo N, Fukuyama R, Meguro T, Nakamuta H, Kohno T, Koida M.
|
| タイトル |
Phosphate provides an extracellular signal that drives nuclear export of Runx2/Cbfa1 in bone cells.
|
| ジャーナル |
Biochem Biophys Res Commun
|
| Abstract |
Inorganic phosphate (Pi) supplement is generally used to accelerate mineralization of cultured bone cells but the mechanism of action is totally unknown. How the action is related with the transactivation of Runx2/Cbfa1,a master gene product of bone formation,was examined. Clonal bone cells (osteoblastic MC3T3-E1, chondrocytic ATDC5 and osteocytic MLO-Y4) on preculture in ascorbate-containing medium constantly expressed and accumulated Cbfa1 in the nuclei, and subsequent increase of Pi concentration to 3 or 10 mM was found to invariably induce nuclear export (not import) of Cbfa1 which was completed in a few hours. In addition, Pi was found to lower the expression of osteocalcin. Leptomycin B completely inhibited Pi-induced nuclear export, suggesting that CRM1/exportin 1 is involved in Pi-induced nuclear export. The result suggests that bone cells are equipped with a novel Pi sensing mechanism which is functionally linked to a nuclear export system of Cbfa1.
|
| 巻・号 |
280(1)
|
| ページ |
348-52
|
| 公開日 |
2001-1-12
|
| DOI |
10.1006/bbrc.2000.4108
|
| PII |
S0006-291X(00)94108-1
|
| PMID |
11162521
|
| MeSH |
3T3 Cells
Animals
Carrier Proteins / metabolism
Cell Nucleus / drug effects
Cell Nucleus / metabolism*
Core Binding Factor Alpha 1 Subunit
Fatty Acids, Unsaturated / pharmacology
Karyopherins*
Kinetics
Mice
Neoplasm Proteins*
Nuclear Proteins / metabolism
Osteoblasts / cytology
Osteoblasts / physiology*
Osteocytes / cytology
Osteocytes / physiology*
Osteogenesis / physiology*
Phosphates / metabolism*
Protein Transport / drug effects
Receptors, Cytoplasmic and Nuclear*
Signal Transduction / physiology*
Transcription Factors / metabolism*
|
| IF |
2.985
|
| 引用数 |
58
|
|
WOS 分野
|
BIOPHYSICS
BIOCHEMISTRY & MOLECULAR BIOLOGY
|
| リソース情報 |
| ヒト・動物細胞 |
MC3T3-E1(RCB1126)
ATDC5(RCB0565) |
