4.6 Article

Anti-proliferative effect of Jesridonin on paclitaxel-resistant EC109 human esophageal carcinoma cells

Journal

INTERNATIONAL JOURNAL OF MOLECULAR MEDICINE
Volume 39, Issue 3, Pages 645-653

Publisher

SPANDIDOS PUBL LTD
DOI: 10.3892/ijmm.2017.2867

Keywords

multidrug resistance; Jesridonin; apoptosis; mechanism

Funding

  1. National Natural Science Foundation of China [21372206, 81430085]
  2. Natural Science Foundation of Henan Province of China [152300410030]
  3. Science and Technology Research Key Project in the Henan province Department of Education [14B350011]
  4. Specialized Research Foundation of the Doctoral Program of High College [20104101120012]

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Chemoresistance to anticancer drugs is a major obstacle in the efforts to develop a successful treatment strategy for esophageal squamous carcinoma (ESCC). Thus, the exploration of new drugs and treatment strategies for combating resistance are of utmost importance. In this study, we investigated the antitumor drug resistance activity of Jesridonin, a new ent-kaurene diterpenoid, and its possible mechanisms of action using the resistant cancer cell line, EC109/Taxol. MTT assay revealed that Jesridonin had similar IC50 values against EC109 paclitaxel-sensitive cells and drug-resistant EC109/Taxol cells in vitro. In mice, Jesridonin effectively prevented the growth of EC109/Taxol tumor xdnografts without exerting any significant toxicity. In addition, Jesridonin significantly inhibited the proliferation of EC109/Taxol cells, induced apoptosis and arrested the cell cycle at the G2/M phase. Furthermore, western blot analysis revealed that Jesridonin upregulated the expression of p53, p53 upregulated modulator of apoptosis (PUMA), cleavedcaspase-9 and cleaved-caspase-3 in EC109/Taxol cells, and downregulated the expression of procaspase-3, procaspase-9 and Bcl-2 in the EC109/Taxol cells in a concentration dependent manner. Overall, our results demonstrate that Jesridonin may have potential for use in the treatment of paclitaxel-resistant ESCC. The data of the present study may lead to the development of novel treatment strategies for paclitaxel-resistant tumors.

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