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2017 ; 16
(9
): 869-878
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NEDD4 is involved in acquisition of epithelial-mesenchymal transition in
cisplatin-resistant nasopharyngeal carcinoma cells
#MMPMID28379054
Feng S
; Yang G
; Yang H
; Liang Z
; Zhang R
; Fan Y
; Zhang G
Cell Cycle
2017[May]; 16
(9
): 869-878
PMID28379054
show ga
Nasopharyngeal carcinoma (NPC) is a highly invasive head-neck cancer derived from
the nasopharyngeal epithelium, mainly prevalent in southern China and Southeast
Asia. Radiotherapy and adjuvant cisplatin (DDP) chemotherapy are standard
administrations applied in the treatment of NPC. However, resistance to
chemotherapeutic drugs has recently become more common, resulting in worse
treatment outcome for NPC therapy. To elucidate the underlying molecular basis of
drug resistance to DDP in NPC cells, we examined the morphocytology, cell
motility and molecular changes in DDP-resistant NPC cells with respect to
epithelial-mesenchymal transition (EMT) features. We found that EMT is closely
associated with DDP-induced drug resistance in NPC cells, as DDP-resistant cells
displayed morphological and molecular markers changes consistent with EMT. Wound
healing and Transwell Boyden chamber assays revealed an enhanced migration and
invasion potential in DDP-resistant NPC cells. Mechanistically, upregulation of
NEDD4 was observed to relate to EMT in DDP-resistant cells. More importantly,
depletion of NEDD4 in resistant cells led to a partial reversion of EMT
phenotypes to MET characteristics. These data suggest that NEDD4 is largely
involved in EMT features and chemoresistance of NPC cancer cells. NEDD4 could be
a novel therapeutic target to overcome drug resistance in successful
administrations of NPC.