1. Ovatodiolide suppresses nasopharyngeal cancer by targeting stem cell-like population, inducing apoptosis, inhibiting EMT and dysregulating JAK/STAT signaling pathway.
- Author
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Liu SC, Huang CM, Bamodu OA, Lin CS, Liu BL, Tzeng YM, Tsai JT, Lee WH, and Chen TM
- Subjects
- Bone Marrow, Cell Line, Tumor, Cell Movement drug effects, Cell Proliferation drug effects, Cells, Cultured, Diterpenes chemistry, Down-Regulation drug effects, Female, Humans, Janus Kinase 2 antagonists & inhibitors, Neoplastic Stem Cells drug effects, STAT3 Transcription Factor antagonists & inhibitors, Up-Regulation drug effects, Apoptosis drug effects, Cisplatin pharmacology, Diterpenes pharmacology, Nasopharyngeal Neoplasms drug therapy, Signal Transduction drug effects
- Abstract
Background: Treatment for metastatic nasopharyngeal carcinoma (NPC) is challenging. Till now, a truly effective chemotherapy regimen for NPC has not yet been identified. These clinical observations prompted us to investigate a potential drug as alternative option for treating., Purpose: This study evaluated the inhibitory effects of Ovatodiolide (Ova), on tumorigenic and cancer stem cell characteristics of NPC cells., Methods: Two NPC cell lines (NPC-BM1 and NPC-BM2) were used to examine the anticancer effects of Ova and the molecular mechanism underlying these activities by using sulforhodamine B cytotoxicity assay, western blot, immunofluorescence, migration, colony and tumorsphere formation assays., Results: Ova significantly inhibited the viability of BM1 and BM2 cells, downregulated Bcl-xL and Puma, and upregulated Bax/Bad expression levels. Ova dose-dependent suppressed migratory/invasive potential of NPC cells, and reduced ability to form colonies. Ova-induced apoptosis correlated with increased Bax/Bcl-xL ratio while NPC motility and colony formation inhibition were associated with reduced expression of p-FAK, p-PXN, F-actin, and Slug proteins and increased E-cadherin. Furthermore, ova inhibited NPC tumorsphere formation, associated with decreased SOX2, OCT4 and JAK-STAT signaling pathway. Ova also attenuated NPC stem cell tumorigenicity, inhibited tumor growth, and enhanced the sensitivity of NPC cells to cisplatin treatment, in vivo., Conclusions: Our results demonstrated the anticancer efficacy of Ova in NPC and its potential as a putative inhibitor of JAK2 and STAT3, which are essential in tumorigenesis of NPC. Further development of Ova is encouraged., (Copyright © 2018. Published by Elsevier GmbH.)
- Published
- 2019
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