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Abstract Title:

Carvacrol Promotes Cell Cycle Arrest and Apoptosis through PI3K/AKT Signaling Pathway in MCF-7 Breast Cancer Cells.

Abstract Source:

Chin J Integr Med. 2020 Jun 22. Epub 2020 Jun 22. PMID: 32572774

Abstract Author(s):

Ashok Mari, Gopikrishnan Mani, Sirpu Natesh Nagabhishek, Gopalakrishnan Balaraman, Nirmala Subramanian, Fathima Bushra Mirza, Jagan Sundaram, Devaki Thiruvengadam

Article Affiliation:

Ashok Mari

Abstract:

OBJECTIVE: To examine the role of carvacrol in modulating PI3K/AKT signaling involved in human breast cancer pathogenesis using in vitro experimental model MCF-7 cells.

METHODS: MTT and lactate dehydrogenase assays were performed with cells treated with different doses of carvacrol (0-250 p mol/L) at different time points (24 and 48 h). The nuclear morphology was assessed in MCF-7 cells with propidium iodide (PI) and acridine orange/ethidium bromide (AO/EB) staining and analyzed by fluorescence microscopy. Events like cell cycle arrest, apoptosis was observed by flow cytometric analysis and expressions of p-Rb, cyclin D1, cyclin-dependent kinase 4 (CDK4), CDK6, Bax, Bcl-2, PI3K/p-AKT was analyzed by immunoblot.

RESULTS: Carvacrol significantly reduced cell viability with the half maximal inhibitory concentration value of 200µmol/L at 24 and 48 h (P<0.05). importantly, there was a significant increase in the accumulation of the G/Gphase upon treatment with carvacrol in MCF-7 cells (P<0.05 or P<0.01). A remarkable decrease in protein expressions of p-Rb, cyclin D1, CDK4 and CDK6 denotes cell cycle arrest (P<0.05 or P<0.01). In addition, carvacrol treatment significantly inhibited PI3K/p-AKT protein expressions leading to induction of apoptosis mediated by decreased Bcl2 and increased Bax protein expressions. Further, Annexin V/PI staining by FACS analysis, dual staining by AO/EB and PI staining studies suggests induction of apoptosis by carvacrol through PI3K/Akt signaling pathway in MCF-7 cells.

CONCLUSION: Carvacrol significantly inhibited the breast cancer MCF-7 cell proliferation and induced apoptosis via suppressing PI3/AKT signaling pathway.

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Sayer Ji
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