Ethanolic extract of Thevetia peruviana flowers enhances TNF-α and TRAIL-induced apoptosis of human cervical cancer cells via intrinsic and extrinsic pathways

  • Authors:
    • Chittima Managit
    • Hiroaki Sakurai
    • Ikuo Saiki
  • View Affiliations

  • Published online on: Friday, February 17, 2017
  • DOI: 10.3892/ol.2017.5748
0

Abstract

Tumor necrosis factor-α (TNF-α) and TNF-related apoptosis‑inducing ligand (TRAIL) are promising candidates for cancer treatment due to their ability to induce apoptosis through death receptor stimulation. However, their usage may be limited due to the resistance of cancer cells to TNF‑α‑ and TRAIL‑induced apoptosis. Currently, there is interest in screening for natural products that can sensitize cancer cells to TNF‑α‑ and TRAIL‑induced apoptosis for their use in combination with TNF‑α or TRAIL. It was previously reported that the bark extract of Thevetia peruviana showed a reversal effect on TRAIL-resistance in human gastric adenocarcinoma cell lines. In the present study, the effects of the ethanolic extract of T. peruviana flowers on TNF‑α‑ and TRAIL‑induced apoptosis of human cervical cancer HeLa cells were investigated in vitro by determining cell viability and apoptosis using a WST‑1 cell proliferation assay and immunoblot analysis, respectively. The ethanolic extract of T. peruviana flowers promoted TNF‑α and TRAIL‑mediated cell death through the activation of the caspase cascade, poly(ADP‑ribose) polymerase and BH3-interacting domain death agonist cleavage. Combined treatment using the extract plus TNF‑α resulted in downregulation of anti‑apoptotic protein, including myeloid cell leukemia sequence‑1, B‑cell lymphoma‑extra large (Bcl‑XL), X-linked inhibitor of apoptosis protein and survivin, while the combined treatment with TRAIL downregulated Bcl‑XL. Thus, the ethanolic extract of T. peruviana flowers has potential in sensitizing the TNF‑α- and TRAIL‑induced apoptosis of HeLa cells via the intrinsic and extrinsic pathways.

Related Articles

Journal Cover

Print ISSN: 1792-1074
Online ISSN:1792-1082

2015 Impact Factor: 1.482
Ranked #97/211 Oncology
(total number of cites)

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
APA
Managit, C., Sakurai, H., & Saiki, I. (1899). Ethanolic extract of Thevetia peruviana flowers enhances TNF-α and TRAIL-induced apoptosis of human cervical cancer cells via intrinsic and extrinsic pathways. Oncology Letters, 0, 0-0. http://dx.doi.org/10.3892/ol.2017.5748
MLA
Managit, C., Sakurai, H., Saiki, I."Ethanolic extract of Thevetia peruviana flowers enhances TNF-α and TRAIL-induced apoptosis of human cervical cancer cells via intrinsic and extrinsic pathways". Oncology Letters 0.0 (1899): 0-0.
Chicago
Managit, C., Sakurai, H., Saiki, I."Ethanolic extract of Thevetia peruviana flowers enhances TNF-α and TRAIL-induced apoptosis of human cervical cancer cells via intrinsic and extrinsic pathways". Oncology Letters 0, no. 0 (1899): 0-0. http://dx.doi.org/10.3892/ol.2017.5748