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In vitro effects on MCF-7 breast cancer cells of signal transduction inhibitor/tamoxifen/eicosapentaenoic acid combinations and their simultaneous delivery across skin

Davison, Zoe, Dutkowski, Carol Mary, Gee, Julia Margaret Wendy, Nicholson, Robert Ian and Heard, Charles Martin 2008. In vitro effects on MCF-7 breast cancer cells of signal transduction inhibitor/tamoxifen/eicosapentaenoic acid combinations and their simultaneous delivery across skin. Pharmaceutical Research 25 (11) , pp. 2516-2525. 10.1007/s11095-008-9665-5

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Abstract

Purpose. To determine the in vitro effects of simultaneously administered LY29400, PD98059, tamoxifen and eicosapentaenoic acid (EPA) on breast cancer cells, and determine their transcutaneous delivery. Methods. Growth assays were performed on MCF-7 cells challenged with IC50 and permeated concentrations of PD98059, LY294002 and tamoxifen firstly in isolation then combined. Permeation studies were performed using PD98059 and LY294002 (singly or simultaneously) in DMSO then fish oil, with enhancers. Immunocytochemical detection of phospho-MAPK, phospho-Akt, total COX-2 and Ki- 67 was performed. Results. When applied singly, fluxes ofPD98059 and LY294002were 0.09±0.008 and 0.14±0.045 μg cm−2 h−1, respectively; applied simultaneously, 0.18±0.045 and 0.49±0.051 μg cm−2 h−1. Permeated concentrations of PD98059 and LY294002 reduced growth to 13.78±0.63%. Fish oil plus 2.5% DMSO/ethanol allowed 5.96± 0.9 and 7.7±1.2 μg cm−2 of PD98059 and LY294002 to permeate after 48 h. Conclusions. PD98059 and LY294002 permeate excised skin at therapeutically useful rates, and also demonstrate growth inhibitory effects on MCF-7 cancer cells. Synergism was noted in co-transport across skin and activity against cancer cells. A formulation based on fish oil is potentially skin friendly; simultaneous permeation of EPA provides further anti-cancer action.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Pharmacy
Subjects: R Medicine > RC Internal medicine > RC0254 Neoplasms. Tumors. Oncology (including Cancer)
R Medicine > RM Therapeutics. Pharmacology
R Medicine > RS Pharmacy and materia medica
Uncontrolled Keywords: breast cancer ; EPA ; signal transduction inhibitor ; tamoxifen ; transcutaneous delivery
Publisher: Kluwer
ISSN: 0724-8741
Last Modified: 28 Jun 2019 03:01
URI: http://orca-mwe.cf.ac.uk/id/eprint/6487

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