XPD inhibits cell growth and invasion and enhances chemosensitivity in esophageal squamous cell carcinoma by regulating the PI3K/AKT signaling pathway.
Int J Mol Med
; 46(1): 201-210, 2020 Jul.
Article
en En
| MEDLINE
| ID: mdl-32377720
ABSTRACT
Esophageal squamous cell carcinoma (ESCC) is a lethal disease due to its high aggressiveness. The aim of the present study was to investigate the role of xeroderma pigmentosum complementation group D (XPD) in the growth and invasion of ESCC and to elucidate the potential underlying molecular mechanisms. Western blot analysis and RTqPCR were used to detect the expression level of XPD in ESCC tissue samples and adjacent normal esophageal tissue samples. The pEGFPN2/XPD plasmid was transfected into human ESCC cell lines (EC9706 and EC109). The proliferation, apoptosis, migration and invasion of EC9706 or EC109 cells were assessed following transfection with the XPD overexpression plasmid. The chemosensitivity of EC9706 or EC109 cells to cisplatin or fluorouracil was evaluated by CCK8 assay. The expression levels of phosphoinositide 3kinase (PI3K)/AKT, nuclear factor (NF)κB, Janus kinase 2 (JAK2)/signal transducer and activator of transcription 3 (STAT3) and mitogenactivated protein kinase (MAPK) signaling pathwayrelated genes were detected by RTqPCR and western blot analysis. The results demonstrated that the expression level of XPD was markedly lower in ESCC tissue samples than in adjacent normal esophageal tissue samples. The pEGFPN2/XPD plasmid was successfully transfected into EC9706 or EC109 cells, inducing XPD overexpression. A High XPD expression markedly suppressed cell proliferation, migration and invasion, and increased the apoptotic rate of EC9706 and EC109 cells. Furthermore, the overexpression of XPD significantly increased the chemosensitivity of EC9706 and EC109 cells to cisplatin or fluorouracil. Following XPD overexpression, the expression levels of PI3K, pAKT, cMyc, Cyclin D1, Bcl2, vascular endothelial growth factor (VEGF) and matrix metalloproteinase (MMP)9 were markedly downregulated, while the expression level of p21 was markedly upregulated. On the whole, the findings of the present study demonstrate that XPD inhibits the growth and invasion of EC9706 and EC109 cells, whilst also enhancing the chemosensitivity of EC9706 and EC109 cells to cisplatin or fluorouracil by regulating the PI3K/AKT signaling pathway. XPD may thus be an underlying target for ESCC treatment and drug resistance.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Xerodermia Pigmentosa
/
Neoplasias Esofágicas
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Fosfatidilinositol 3-Quinasas
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Proteínas Proto-Oncogénicas c-akt
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Carcinoma de Células Escamosas de Esófago
Límite:
Female
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Humans
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Male
/
Middle aged
Idioma:
En
Revista:
Int J Mol Med
Asunto de la revista:
BIOLOGIA MOLECULAR
/
GENETICA MEDICA
Año:
2020
Tipo del documento:
Article