Effects of Tiam1 on invasion and metastasis of breast carcinoma and its mechanisms / 中华肿瘤杂志
Chinese Journal of Oncology
;
(12): 831-834, 2012.
Article
in Chinese
| WPRIM
| ID: wpr-307284
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the significance of Tiam1 in invasion and metastasis of breast carcinoma and its mechanisms.</p><p><b>METHODS</b>Immunohistochemistry was used to detect Tiam1 expression in tumor tissue of 126 breast carcinomas. Tiam1 was silenced by siRNA in breast carcinoma cell line MDA-MB-435, then the expressions of phosphor-ERK 1, ERK 2 and VEGF were detected, and electrophoretic mobility shift assay (EMSA) was used to examine the transcription activiy of AP-1.</p><p><b>RESULTS</b>There was a significant relationship between Tiam1 expression and lymph node metastasis (P < 0.05). Furthermore, after silencing of Tiam1, the expressions of phosphor-ERK 1, ERK 2 and VEGF were decreased, and the transcription activity of AP-1 was down-regulated in the MDA-MB-435 cells.</p><p><b>CONCLUSION</b>Tiam1 is closely related with invasion and metastasis of breast carcinoma, and the cascade Tiam1 through ERK, AP-1 and VEGF pathways may play an important role in enhancing angiogenesis, therefore, to promote invasion and metastasis of breast carcinoma.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pathology
/
Breast Neoplasms
/
RNA, Messenger
/
Signal Transduction
/
Gene Expression Regulation, Neoplastic
/
Transcription Factor AP-1
/
Mitogen-Activated Protein Kinase 1
/
Guanine Nucleotide Exchange Factors
/
Gene Silencing
/
RNA, Small Interfering
Limits:
Female
/
Humans
Language:
Chinese
Journal:
Chinese Journal of Oncology
Year:
2012
Type:
Article
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