Document Detail

Analysis of the role of the BMP7-Smad4-Id2 signaling pathway in SW480 colorectal carcinoma cells.
MedLine Citation:
PMID:  21523323     Owner:  NLM     Status:  MEDLINE    
The bone morphogenetic proteins (BMPs) Smad4 and Id2 exert their effect on colorectal carcinoma via several uncharacterized mechanisms. In this study, we investigated whether the transcription factor Id2, which has been implicated in colorectal carcinoma proliferation and metastasis, is involved in BMP-7/Smad4 signaling, or whether it is regulated by BMP-7 via another mechanism in this cell type. A Smad4-cDNA vector was constructed and stably transfected into SW480 cells. Protein levels of Smad4 and Id2 were examined by Western blotting. Inhibitory effects on cellular proliferation activity were determined by the methyl thiazolyl tetrazolium (MTT) assay, and invasion and migration potential was detected using the in vitro Matrigel-coated invasion and migration assay. Levels of Smad4 protein were significantly increased in SW480 cells transfected with Smad4-cDNA, compared to those transfected with empty vector. Growth curve analysis revealed that live cell numbers were lower in the Smad4-expressing group than in the control group after 36 h, and that BMP7 treatment caused an increase in live cell numbers in Smad4-expressing cells. Transwell chamber analysis revealed that migration/invasion activity was significantly suppressed when Smad4 was expressed. Finally, Smad4-expressing cells treated with BMP7 expressed a higher level of Id2 protein than the controls. The results indicate that Smad4 expression may inhibit the growth and invasion of SW480 cells, and that BMP7 affects Id2 levels through Smad4. Therefore, BMP7-Smad4-Id2 signaling may play a significant role in the development of colorectal carcinoma.
Qiang Shi; Yun-Shi Zhong; Zhong Ren; Quan-Lin Li; Ping-Hong Zhou; Mei-Dong Xu; Li-Qing Yao
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-04-26
Journal Detail:
Title:  Molecular medicine reports     Volume:  4     ISSN:  1791-3004     ISO Abbreviation:  Mol Med Rep     Publication Date:    2011 Jul-Aug
Date Detail:
Created Date:  2011-06-06     Completed Date:  2011-09-30     Revised Date:  2013-02-22    
Medline Journal Info:
Nlm Unique ID:  101475259     Medline TA:  Mol Med Rep     Country:  Greece    
Other Details:
Languages:  eng     Pagination:  627-31     Citation Subset:  IM    
Endoscopic Center, Zhongshan Hospital, Fudan University, Shanghai 200032, People's Republic of China.
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MeSH Terms
Bone Morphogenetic Protein 7 / pharmacology*
Carcinoma / metabolism*,  pathology
Cell Line, Tumor
Cell Movement
Colorectal Neoplasms / metabolism*,  pathology
Inhibitor of Differentiation Protein 2 / metabolism,  physiology*
Signal Transduction*
Smad4 Protein / genetics,  metabolism,  physiology*
Reg. No./Substance:
0/Bone Morphogenetic Protein 7; 0/Inhibitor of Differentiation Protein 2; 0/Smad4 Protein

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