Abstract:
:Activation of the cytoplasmic (Ras-Raf-MEK-ERK) signaling cascade was shown to be both, necessary and sufficient for transformation in vitro as well as in vivo. However, over the last years the involvement of stress-activated protein kinases (SAPKs)/Jun N-terminal kinases (JNKs), and their substrate c-Jun in the process of cellular transformation has been suggested. To dissect the mechanisms through which JNK signaling contributes to the transformation process we employed a recently generated constitutively active version of this kinase, SAPKbeta-MKK7, which behaves like a weakly transforming oncogene in vitro. Dissection of the transforming potential of oncogenic JNK demonstrates that it is sufficient for tumor induction in nude mice. In vitro studies and analysis of tumor material support the conclusion that oncogenic JNK primarily transforms through its effects on cell proliferation and tumor vascularization but does not affect cell survival.
journal_name
Cancer Lettjournal_title
Cancer lettersauthors
Rennefahrt U,Illert B,Greiner A,Rapp UR,Troppmair Jdoi
10.1016/j.canlet.2004.05.015keywords:
subject
Has Abstractpub_date
2004-11-08 00:00:00pages
113-24issue
1eissn
0304-3835issn
1872-7980pii
S0304-3835(04)00389-1journal_volume
215pub_type
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