Temporal quantitative proteomics by iTRAQ 2D-LC-MS/MS and corresponding mRNA expression analysis identify post-transcriptional modulation of actin-cytoskeleton regulators during TGF-beta-Induced epithelial-mesenchymal transition.
J Proteome Res
; 8(1): 35-47, 2009 Jan.
Article
in En
| MEDLINE
| ID: mdl-19118450
ABSTRACT
To gain insights into how TGF-beta regulates epithelial-mesenchymal transition (EMT), we assessed the time course of proteins and mRNAs during EMT by multiplex iTRAQ labeling and 2D-LC-MS/MS, and by hybridization, respectively. Temporal iTRAQ analysis identified 66 proteins as differentially expressed during EMT, including newly associated proteins calpain, fascin and macrophage-migration inhibitory factor (MIF). Comparing protein and mRNA expression overtime showed that all the 14 up-regulated proteins involved in the actin-cytoskeleton remodeling were accompanied by increases in corresponding mRNA expression. Interestingly, siRNA mediated knockdown of cofilin1 potentiated TGF-beta-induced EMT. Further analysis of cofilin1 and beta-actin revealed an increase in their mRNA stability in response to TGF-beta, contributing to the observed increase in mRNA and protein expression. These results are the first demonstration of post-transcriptional regulation of cytoskeletal remodelling and a key role for cofilin1 during TGF-beta-induced EMT.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Mass Spectrometry
/
Cytoskeleton
/
RNA, Messenger
/
RNA Processing, Post-Transcriptional
/
Chromatography, Liquid
/
Transforming Growth Factor beta
/
Actins
/
Proteomics
/
Epithelium
/
Mesoderm
Type of study:
Prognostic_studies
Limits:
Humans
Language:
En
Journal:
J Proteome Res
Journal subject:
BIOQUIMICA
Year:
2009
Document type:
Article
Affiliation country:
United States