Effects of Somatostatin and Vitamin C on the Fatty Acid Profile of Breast Cancer Cell Membranes

Author(s): Aysegul Hanikoglu, Ertan Kucuksayan, Ferhat Hanikoglu, Tomris Ozben*, Georgia Menounou, Anna Sansone, Chrys Chatgilialoglu, Giuseppe Di Bella, Carla Ferreri.

Journal Name: Anti-Cancer Agents in Medicinal Chemistry
(Formerly Current Medicinal Chemistry - Anti-Cancer Agents)

Volume 19 , Issue 15 , 2019

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Abstract:

Background: Vitamin C (Vit C) is an important physiological antioxidant with growing applications in cancer. Somatostatin (SST) is a natural peptide with growth inhibitory effect in several mammary cancer models.

Objective: The combined effects of SST and Vit C supplementation have never been studied in breast cancer cells so far.

Methods: We used MCF-7 and MDA-MB231 breast cancer cells incubated with SST for 24h, in the absence and presence of Vit C, at their EC50 concentrations, to evaluate membrane fatty acid-profiles together with the follow-up of EGFR and MAPK signaling pathways.

Results: The two cell lines gave different membrane reorganization: in MCF-7 cells, decrease of omega-6 linoleic acid and increase of omega-3 fatty acids (Fas) occurred after SST and SST+Vit C incubations, the latter also showing significant increases in MUFA, docosapentaenoic acid and mono-trans arachidonic acid levels. In MDA-MB231 cells, SST+Vit C incubation induced significant membrane remodeling with an increase of stearic acid and mono-trans-linoleic acid isomer, diminution of omega-6 linoleic, arachidonic acid and omega-3 (docosapentaenoic and docosadienoic acids). Distinct signaling pathways in these cell lines were studied: in MCF-7 cells, incubations with SST and Vit C, alone or in combination significantly decreased EGFR and MAPK signaling, whereas in MDA-MB231 cells, SST and Vit C incubations, alone or combined, decreased p- P44/42 MAPK levels, and increased EGFR levels.

Conclusion: Our results showed that SST and Vit C can be combined to induce membrane fatty acid changes, including lipid isomerization through a specific free radical-driven process, influencing signaling pathways.

Keywords: Somatostatin, Vitamin C, membrane fatty acid profile, breast cancer, cell signaling, gas chromatography.

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Article Details

VOLUME: 19
ISSUE: 15
Year: 2019
Page: [1899 - 1909]
Pages: 11
DOI: 10.2174/1871520619666190930130732
Price: $58

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