Related Experiment Videos
Lymphocyte transformation by Pim-2 is dependent on nuclear factor-kappaB activation
Peter S Hammerman1, Casey J Fox, Ryan M Cinalli
1Department of Cancer Biology and Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6160, USA.
Cancer Research
|November 19, 2004
Summary
Pim-2 kinase promotes cancer cell survival by activating nuclear factor-kappaB (NF-kappaB). Blocking NF-kappaB eliminates Pim-2
Area of Science:
- Oncology
- Molecular Biology
- Cell Signaling
Background:
- Pim-2 is an oncogenic kinase implicated in various human cancers.
- Its role in promoting cell survival is linked to proliferative signals.
- Dysregulated Pim-2 expression is observed in leukemia, lymphoma, and multiple myeloma.
Purpose of the Study:
- To elucidate the mechanism by which Pim-2 promotes cancer cell survival.
- To investigate the role of nuclear factor-kappaB (NF-kappaB) in Pim-2-mediated survival.
- To identify key signaling molecules involved in this pathway.
Main Methods:
- Cell-based assays to assess cell survival and proliferation.
- Western blotting to detect protein phosphorylation and dimerization.
- Inhibition of NF-kappaB signaling pathways.
- Analysis of gene expression.
Main Results:
- Pim-2 promotes cell survival through activation of NF-kappaB.
- Pim-2 induces phosphorylation of serine/threonine kinase Cot, enhancing IkappaB kinase activity.
- NF-kappaB blockade abrogates Pim-2-mediated survival and cooperativity with Myc.
- Cot phosphorylation and expression are essential for Pim-2's prosurvival function.
Conclusions:
- Pim-2 initiates a novel NF-kappaB activation pathway regulating cell survival.
- This pathway involves Cot kinase and is crucial for Pim-2's oncogenic activity.
- Targeting this pathway could offer therapeutic strategies for Pim-2-driven malignancies.