LncRNA-ATB promotes trastuzumab resistance and invasion-metastasis cascade in breast cancer.
Oncotarget
; 6(13): 11652-63, 2015 May 10.
Article
en En
| MEDLINE
| ID: mdl-25871474
ABSTRACT
Trastuzumab resistance is leading cause of mortality in HER2-positive breast cancers, and the role of TGF-ß-induced epithelial-mesenchymal transition (EMT) in trastuzumab resistance is well established, but the involvement of lncRNAs in trastuzumab resistance is still unknown. Here, we generated trastuzumab-resistant breast cancer cells with increased invasiveness compared with parental cells, and observed robust epithelial-mesenchymal transition (EMT) and consistently elevated TGF-ß signaling in these cells. We identified long noncoding RNA activated by TGF-ß (lnc-ATB) was the most remarkably upregulated lncRNA in TR SKBR-3 cells and the tissues of TR breast cancer patients. We found that lnc-ATB could promote trastuzumab resistance and invasion-metastasis cascade in breast cancer by competitively biding miR-200c, up-regulating ZEB1 and ZNF-217, and then inducing EMT. In addition, we also found that the high level of lnc-ATB was correlated with trastuzumab resistance of breast cancer patients. Thus, these findings suggest that lncRNA-ATB, a mediator of TGF-ß signaling, could predispose breast cancer patients to EMT and trastuzumab resistance.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Neoplasias de la Mama
/
Movimiento Celular
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Resistencia a Antineoplásicos
/
ARN Largo no Codificante
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Trastuzumab
/
Antineoplásicos
Tipo de estudio:
Prognostic_studies
Límite:
Female
/
Humans
Idioma:
En
Año:
2015
Tipo del documento:
Article