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Differential dose–response effect of cyclosporine A in regulating apoptosis and autophagy markers in MCF-7 cells

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Abstract

Cyclosporine A (CsA) is an immunosuppressant primarily used at a higher dosage in transplant medicine and autoimmune diseases with a higher success rate. At lower doses, CsA exhibits immunomodulatory properties. CsA has also been reported to inhibit breast cancer cell growth by downregulating the expression of pyruvate kinase. However, differential dose–response effects of CsA in cell growth, colonization, apoptosis, and autophagy remain largely unidentified in breast cancer cells. Herein, we showed the cell growth-inhibiting effects of CsA by preventing cell colonization and enhancing DNA damage and apoptotic index at a relatively lower concentration of 2 µM in MCF-7 breast cancer cells. However, at a higher concentration of 20 µM, CsA leads to differential expression of autophagy-related genes ATG1, ATG8, and ATG9 and apoptosis-associated markers, such as Bcl-2, Bcl-XL, Bad, and Bax, indicating a dose–response effect on differential cell death mechanisms in MCF-7 cells. This was confirmed in the protein–protein interaction network of COX-2 (PTGS2), a prime target of CsA, which had close interactions with Bcl-2, p53, EGFR, and STAT3. Furthermore, we investigated the combined effect of CsA with SHP2/PI3K-AKT inhibitors showing significant MCF-7 cell growth reduction, suggesting its potential to use as an adjuvant during breast cancer therapy.

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Acknowledgements

Authors would like to thank the American University of Ras Al Khaimah for the support of this research.

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This research did not receive any substantial funding.

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Correspondence to Cijo George Vazhappilly.

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Siddiqui, S.S., Hodeify, R., Mathew, S. et al. Differential dose–response effect of cyclosporine A in regulating apoptosis and autophagy markers in MCF-7 cells. Inflammopharmacol 31, 2049–2060 (2023). https://doi.org/10.1007/s10787-023-01247-4

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  • DOI: https://doi.org/10.1007/s10787-023-01247-4

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