Knockdown of ZEB1 suppressed the formation of vasculogenic mimicry and epithelial-mesenchymal transition in the human breast cancer cell line MDA-MB-231.
Mol Med Rep
; 17(5): 6711-6716, 2018 05.
Article
de En
| MEDLINE
| ID: mdl-29512767
ABSTRACT
Breast cancer is a common malignant tumor in women. It has been suggested that a type of microcirculation pattern that does not rely on host microvascular endothelial cells known as vasculogenic mimicry (VM) may contribute to the poor effect of antiangiogenesis treatment on some patients with breast cancer. However, the formation and regulatory mechanism of VM in breast cancer are unclear and still require further investigation. The present study examined whether decreasing the expression of zinc finger Ebox binding homeobox (ZEB1) using siRNA can inhibit the formation of VM in Triple Negative Breast Cancer (TNBC), and its specific function and molecular mechanism. mRNA and protein expression were detected by RTqPCR and western blotting. Invasion assay and tube formation assay were also performed. The results demonstrated that ZEB1 small hairpin (sh)RNA inhibited the formation of VM. Knockdown of ZEB1 markedly inhibited the expression of vimentin in MDAMB231 cells and markedly increased the expression of Ecadherin. It was suggested that ZEB1 shRNA may have inhibited the epithelialmesenchymal transition (EMT). In addition, ZEB1 shRNA inhibited the invasion of MDAMB231 cells and suppressed the expression of fetal liver kinase 1 (flk1). The flk1 inhibitor Semaxanib inhibited the formation of VM; thus, ZEB1 shRNA inhibited EMT and cell invasion, and may have inhibited the formation of VM through flk1. The present study contributed further understanding on the theory of tumor angiogenesis and provided theoretical basis for novel targeted therapy of TNBC.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Techniques de knock-down de gènes
/
Transition épithélio-mésenchymateuse
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Tumeurs du sein triple-négatives
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Facteur de transcription Zeb1
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Protéines tumorales
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Néovascularisation pathologique
Limites:
Female
/
Humans
Langue:
En
Journal:
Mol Med Rep
Année:
2018
Type de document:
Article