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Published in: BMC Complementary Medicine and Therapies 1/2021

Open Access 01-12-2021 | Breast Cancer | Research article

Thymoquinone inhibited vasculogenic capacity and promoted mesenchymal-epithelial transition of human breast cancer stem cells

Authors: Sanya Haiaty, Mohammad-Reza Rashidi, Maryam Akbarzadeh, Ahad Bazmani, Mostafa Mostafazadeh, Saba Nikanfar, Zohre Zibaei, Reza Rahbarghazi, Mohammad Nouri

Published in: BMC Complementary Medicine and Therapies | Issue 1/2021

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Abstract

Background

Vasculogenic mimicry (VM) is characterized by the formation of tubular structure inside the tumor stroma. It has been shown that a small fraction of cancer cells, namely cancer stem cells (CSCs), could stimulate the development of vascular units in the tumor niche, leading to enhanced metastasis to the remote sites. This study aimed to study the inhibitory effect of phytocompound, Thymoquinone (TQ), on human breast MDA-MB-231 cell line via monitoring Wnt/PI3K signaling pathway.

Methods

MDA-MB-231 CSCs were incubated with different concentrations of TQ for 48 h. The viability of CSCs was determined using the MTT assay. The combination of TQ and PI3K and Wnt3a inhibitors was examined in CSCs. By using the Matrigel assay, we measured the tubulogenesis capacity. The percent of CD24 CSCs and Rhodamine 123 efflux capacity was studied using flow cytometry analysis. Protein levels of Akt, p-Akt, Wnt3a, vascular endothelial-cadherin (VE-cadherin), and matrix metalloproteinases-2 and -9 (MMP-2 and -9) were detected by western blotting.

Results

TQ decreased the viability of CSCs in a dose-dependent manner. The combination of TQ with PI3K and Wnt3a inhibitors reduced significantly the survival rate compared to the control group (p < 0.05). TQ could blunt the stimulatory effect of vascular endothelial growth factor (VEGF), epidermal growth factor (EGF), fibroblast growth factor (FGF) on CSCs (p < 0.05). The vasculogenic capacity of CSCs was reduced after being-exposed to TQ (p < 0.05). Western blotting revealed the decrease of CSCs metastasis by suppressing MMP-2 and -9. The protein level of VE-cadherin was also diminished in TQ-treated CSCs as compared to the control cell (p < 0.05), indicating inhibition of mesenchymal-endothelial transition (MendT). TQ could suppress Wnt3a and PI3K, which coincided with the reduction of the p-Akt/Akt ratio. TQ had the potential to decrease the number of CD24 CSCs and Rhodamine 123 efflux capacity after 48 h.

Conclusion

TQ could alter the vasculogenic capacity and mesenchymal-epithelial transition of human breast CSCs in vitro. Thus TQ together with anti-angiogenic therapies may be a novel therapeutic agent in the suppression of VM in breast cancer.
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Metadata
Title
Thymoquinone inhibited vasculogenic capacity and promoted mesenchymal-epithelial transition of human breast cancer stem cells
Authors
Sanya Haiaty
Mohammad-Reza Rashidi
Maryam Akbarzadeh
Ahad Bazmani
Mostafa Mostafazadeh
Saba Nikanfar
Zohre Zibaei
Reza Rahbarghazi
Mohammad Nouri
Publication date
01-12-2021
Publisher
BioMed Central
Published in
BMC Complementary Medicine and Therapies / Issue 1/2021
Electronic ISSN: 2662-7671
DOI
https://doi.org/10.1186/s12906-021-03246-w

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