DAL-1/4.1B contributes to epithelial-mesenchymal transition via regulation of transforming growth factor-ß in lung cancer cell lines.
Mol Med Rep
; 12(4): 6072-8, 2015 Oct.
Article
en En
| MEDLINE
| ID: mdl-26300315
ABSTRACT
The present study aimed to investigate the effects of the tumor suppressor gene differentially expressed in adenocarcinoma of the lung 1 (DAL1)/4.1B on earlystage adenocarcinoma of the lung. The role of DAL1/4.1B in the epithelialmesenchymal transition (EMT), which is implicated in cancer metastasis, was examined using DAL1 knockdown and overexpression, followed by polymerase chain reaction and western blot analysis of EMT markers, as well as cell counting and cell migration/invasion assays. The results showed that DAL1/4.1B has a role in transforming growth factor (TGF)ßinduced EMT in nonsmall cell lung cancer cells. Silencing of DAL1/4.1B with inhibitory RNAs altered the expression of numerous EMT markers, including Ecadherin and ßcatenin, whereas overexpression of DAL1/4.1B had the opposite effect. In addition, DAL1/4.1B expression was induced following TGFß treatment at the protein and mRNA level. DAL1/4.1B deficiency impaired TGFßinduced EMT and increased cell migration and invasion. These results suggested that DAL1/4.1B contributed to the EMT and may be important for tumor metastasis in lung cancer. Together with the results of a previous study by our group, the present study suggested that DAL1/4.1B acts as a tumor suppressor in the early transformation process in lung cancer, while in later stages, it functions as an oncogene affecting the biological features of human lung carcinoma cells. The results of the present study provided evidence for the feasibility of utilizing DAL1/4.1B as a target for lung cancer gene therapy.
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Banco de datos:
MEDLINE
Asunto principal:
Factor de Crecimiento Transformador beta
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Carcinoma de Pulmón de Células no Pequeñas
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Transición Epitelial-Mesenquimal
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Neoplasias Pulmonares
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Proteínas de Microfilamentos
Límite:
Humans
Idioma:
En
Año:
2015
Tipo del documento:
Article