Activation of MAPK signaling pathway is essential for Id-1 induced serum independent prostate cancer cell growth.
In: Oncogene, Jg. 21 (2002-12-05), Heft 55, S. 8498-8505
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Zugriff:
The helix–loop–helix protein Id-1 has been suggested to play a positive role in cell proliferation and tumorigenesis of many types of human cancers. However, little is known about the molecular mechanism involved in the function of Id-1. In this study, using four stable Id-1 transfectant clones, we investigated the involvement of MAPK signaling pathway in the Id-1 induced serum independent prostate cancer cell growth. Our results demonstrated that both transient and stable ectopic Id-1 expression in prostate cancer LNCaP cells led to activation of the Raf/MEK1/2 signaling pathway. In addition, inhibition of MEK1/2 phosphorylation by one of its inhibitors, PD098059, resulted in the decreased cell cycle S phase fraction and cell growth rate, suggesting that activation of MAPK signaling pathway is essential for Id-1 induced prostate cancer cell proliferation. Furthermore, treatment with antisense oligonucleotide complementary to Id-1 mRNA in PC-3 and DU145 cells resulted in a decreased Id-1 expression which was accompanied by decreased Egr-1 protein. Our results suggest for the first time that the function of Id-1 is associated with MAPK signaling pathway activation and indicate a possible novel mechanism in which Id-1 regulates prostate cancer cell growth and tumorigenesis.Oncogene (2002) 21, 8498–8505. doi:10.1038/sj.onc.1206007 [ABSTRACT FROM AUTHOR]
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Activation of MAPK signaling pathway is essential for Id-1 induced serum independent prostate cancer cell growth.
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Autor/in / Beteiligte Person: | Ling, Ming-Tat ; Wang, Xianghong ; Ouyang, Xue-Song ; Lee, Terence KW ; Fan, Tian-Yong ; Xu, Kexin ; Tsao, Sai-Wah ; Wong, Y C |
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Zeitschrift: | Oncogene, Jg. 21 (2002-12-05), Heft 55, S. 8498-8505 |
Veröffentlichung: | 2002 |
Medientyp: | academicJournal |
ISSN: | 0950-9232 (print) |
DOI: | 10.1038/sj.onc.1206007 |
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