Proliferative Activation of Quiescent Rat-lA Cells by AFosB
Proliferative Activation of Quiescent Rat-lA Cells by AFosB
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AFosB 对静止大鼠-1A 细胞的增殖激活
DOI:
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发表时间:
--
期刊:
影响因子:
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通讯作者:
S. Oda
中科院分区:
文献类型:
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作者:
S. Oda
Fos and Jun transcription factors are induced during the normal course of the proliferative response of quiescent cells to serum or to growth factors. We have shown that AFosB, an alternatively spliced form of FosB, is formed as rapidly as FosB in serum-stimulated Rat-IA cells. Although AFosB lacks the C-terminal region of FosB carrying the transactivation function, constitutive expression of AFosB transforms Rat-lA cells as does expression of FosB. The transforming ability ofAFosB suggests that AFosB may lead to proliferative activation of quiescent cells without activating AP-1-responsive genes. To address this question, FosB or AFosB was expressed as a fusion protein with the ligand binding domain of the human estrogen receptor (ER) in Rat-IA cells. After estrogen treatment, the fusion protein accumulates in nuclei and forms stable complexes with Jun proteins. We have shown that ER-AFosB or to a lesser extent ER-FosB triggers quiescent Rat-IA cells to transit G1, initiate DNA replication, and ultimately undergo cell division at least once. Since ER-FosB, but not ER-AFosB, induced expression of the AP-1-responsive transin/stromelysin gene, we concluded that the N-terminal region and the DNA binding domain of FosB or AFosB itself have the potential to regulate cell proliferation and that the transactivation function carried by the C-terminal region of FosB is not essential for the proliferative activation of quiescent cells.
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DOI:
10.1073/pnas.89.2.618
发表时间:
1992-01
影响因子:
11.1
作者:
L. Håvarstein;I. Morgan;W. Y. Wong;P. Vogt
通讯作者:
L. Håvarstein;I. Morgan;W. Y. Wong;P. Vogt
DOI:
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发表时间:
1992-12
期刊:
Cell growth & differentiation : the molecular biology journal of the American Association for Cancer Research
影响因子:
--
作者:
M. Hartl;P. Vogt
通讯作者:
M. Hartl;P. Vogt
影响因子:
10.5
作者:
S. Oliviero;G. Robinson;K. Struhl;Bruce M. Spiege
通讯作者:
S. Oliviero;G. Robinson;K. Struhl;Bruce M. Spiege
影响因子:
11.2
作者:
R. Eckert;B. Katzenellenbogen
通讯作者:
R. Eckert;B. Katzenellenbogen
影响因子:
10.5
作者:
Wisdom,R;Yen,J;Rashid,D;Verma,IM
通讯作者:
Verma,IM