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Updated: May 9, 2026

Heterotypic Three-dimensional In Vitro Modeling of Stromal-Epithelial Interactions During Ovarian Cancer Initiation and Progression
12:42

Heterotypic Three-dimensional In Vitro Modeling of Stromal-Epithelial Interactions During Ovarian Cancer Initiation and Progression

Published on: August 28, 2012

Activation of apoptotic pathway in normal, cancer ovarian cells by epothilone B

Aneta Rogalska1, Ewa Szula1, Arkadiusz Gajek1

  • 1Department of Thermobiology, Institute of Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland.

Environmental Toxicology and Pharmacology
|July 11, 2013
PubMed

Insights

Epothilone B (Epo B) shows greater cytotoxicity against ovarian cancer cells than paclitaxel. Epo B induces apoptosis through mitochondrial pathways, involving ROS production and calcium level changes.

Area of Science:

  • Oncology
  • Cell Biology
  • Pharmacology

Background:

  • Epothilones represent a novel class of microtubule-targeting agents.
  • Paclitaxel is a standard treatment for ovarian cancer, but resistance can occur.

Purpose of the Study:

  • To compare the effects of epothilone B (Epo B) and paclitaxel (PTX) on ovarian cancer cell metabolism.
  • To investigate the mechanism of Epo B's antitumor activity.

Main Methods:

  • Comparative analysis of Epo B and PTX on OV-90 (tumor) and MM 14 (normal) ovarian cells.
  • Assessment of cytotoxicity, apoptosis markers, cell morphology, mitochondrial membrane potential, cytochrome c release, intracellular calcium levels, and ROS production.

Main Results:

  • Epothilone B demonstrated significantly higher cytotoxicity against OV-90 ovarian cancer cells compared to paclitaxel.
  • Epo B induced apoptosis, evidenced by changes in cell morphology, mitochondrial membrane potential, and cytochrome c release.
  • Reactive oxygen species (ROS) production and a slight increase in intracellular calcium were observed, both linked to Epo B-induced apoptosis via the mitochondrial pathway.

Conclusions:

  • Epothilone B is a promising alternative to paclitaxel for ovarian cancer treatment due to its superior efficacy.
  • The antitumor activity of Epo B is mediated by the induction of apoptosis through the mitochondrial pathway, involving ROS generation.
Keywords:
2′,7′-dichlorodihydrofluorescein diacetate5,5′6,6′-tetrachloro-1,1′3,3′-tetraethyl-benzimidazol-carbocyanine iodideApoptosisDCFH(2)-DAEpo BEpothilone BHuman ovarian cell linesJC-1PTXPaclitaxelepothilone Bpaclitaxel

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