Analysis of Ras-induced oncogenic transformation of NIH-3T3 cells using differential-display 2-DE proteomics
Details
Publication Year 2007-06, Volume 28, Issue #12, Page 1997-2008
Journal Title
ELECTROPHORESIS
Publication Type
Journal Article
Abstract
Ras proteins control at least three crucial signalling networks responsible for several cellular processes including anchorage independence, survival, and proliferation. Point mutations in one of the three ras genes are frequent in human tumours. In these tumours, Ras oncoproteins contribute significantly to the malignant phenotype, including deregulation of tumour-cell growth, apoptosis and invasiveness, and the ability to induce angiogenesis. Although significant strides have been made in understanding Ras biology, the collaborative actions of Ras effectors are still poorly understood. Here, we describe a proteomics approach to study global changes in protein expression in Ras-transformed NIH3T3 cells. We exploited 2-D difference gel electrophoresis (DIGE) for pre-separation fluorescent protein labelling with three separate dyes to reduce gel-to-gel variability, to increase sensitivity and dynamic range of protein detection, and to enhance quantification of dysregulated proteins. Proteins dysregulated (> 1.5-fold) by oncogenic Ras transformation reported to be implicated in Ras-regulated pathways include S-methyl-5-thioadenosine phosphorylase, stress-induced-phosphoprotein 1, galectin-1, annexin A7 (synexin), 60S acidic ribosomal protein PO, serine/threonine protein phosphatase type 1 (PP1 alpha) and prohibitin. Significantly, we report for the first time the expression of the newly discovered cytokine IL-25 (or IL-17E) in mouse embryonic fibroblast cells and its down-regulation (2.1-fold) upon Ras-induced oncogenic transformation.
Publisher
WILEY-V C H VERLAG GMBH
Keywords
ALLERGIC AIRWAY INFLAMMATION; MASS-SPECTROMETRY; H-RAS; CYTOKINE DYSREGULATION; PROTEIN; CARCINOMA; ACTIVATION; APOPTOSIS; CANCER; INTERLEUKIN-25
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Creation Date: 2007-06-01 12:00:00
Last Modified: 0001-01-01 12:00:00
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