Title:Synergistic Growth Inhibitory Effects of Eryngium kotschyi Extracts with
Conventional Cytotoxic Agents: Cisplatin and Doxorubicin against
Human Endometrium Cancer Cells
Volume: 23
Issue: 5
Author(s): Ayşe Kübra Karaboğa Arslan*, Leyla Paşayeva, Merve Ayşe Esen and Osman Tugay
Affiliation:
- Department of Pharmacology, Faculty of Pharmacy, Erciyes University, Kayseri, 38039, Turkey
Keywords:
Cisplatin, doxorubicin, endometrium cancer, Eryngium kotschyi, RL95-2, xCELLigence.
Abstract: Background: Endometrial cancer is one of the most common types of cancer. For this reason,
various studies have been carried out on its treatment and the effects of natural products on this
disease.
Objectives: This study aimed to examine the growth inhibitory effects of Eryngium kotschyi Boiss. ethyl
acetate [EKE] and butanol [EKB] obtained from the main methanol [EKM] extract from the aerial parts
on human endometrium carcinoma [RL95-2] cells and their synergistic effect with cisplatin or doxorubicin.
Methods: RL95-2 cells were treated with E. kotschyi extracts either alone or in combination with cisplatin
or doxorubicin. The effects on cell growth were determined using the MTT assay and real-time cell
analysis xCELLigence.
Results: The extracts demonstrated growth inhibitory activity, with a certain degree of selectivity
against the RL95-2 cell line. Synergistic effects of EKE/cisplatin or doxorubicin at different concentration
levels were demonstrated in RL95-2 cells. In some instances, the EKE/doxorubicin combinations
resulted in antagonistic effects. The reduction level of cell viability was different and specific to each
combination for the RL95-2 cell line.
Conclusion: The growth inhibitory activity of cisplatin or doxorubicin, as a single agent, may be modified
by combinations of the extracts and be synergistically enhanced in some cases. A significant synergistic
effect of EKE on the RL95-2 cell line with cisplatin and doxorubicin was observed. This cytotoxic
effect can be investigated in terms of molecular mechanisms. This study is the first of its kind in the
literature. The mechanisms involved in this interaction between chemotherapeutic drugs and plant extracts
remain unclear and should be further evaluated.