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Resveratrol dimers are novel sphingosine kinase 1 inhibitors and affect sphingosine kinase 1 expression and cancer cell growth and survival

Lim, Keng Gat and Gray, Alexander I and Pyne, Susan and Pyne, Nigel J (2012) Resveratrol dimers are novel sphingosine kinase 1 inhibitors and affect sphingosine kinase 1 expression and cancer cell growth and survival. British Journal of Pharmacology, 166 (5). pp. 1605-1616.

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Abstract

Sphingosine kinase 1 catalyses formation of the bioactive lipid, sphingosine 1-phosphate, which protects cancer cells from apoptosis. Therefore, sphingosine kinase 1 is a novel target for intervention with anti-cancer agents. We have assessed the effect of the anti-cancer agent, resveratrol and its dimers (ampelopsin A and balanocarpol) on sphingosine kinase 1 activity and on survival of MCF-7 breast cancer cells. Ampelopsin A and balanocarpol were purified from Hopea dryobalanoides and their effect on sphingosine kinase 1 activity and expression, [3H] thymidine incorporation, ERK-1/2 phosphorylation and PARP activity assessed in MCF-7 cells. Resveratrol, ampelopsin A and balanocarpol were novel inhibitors of sphingosine kinase 1 activity. Balanocarpol was a mixed inhibitor (with sphingosine) of sphingosine kinase 1 with a Kic= 90 +/- 10 mu M and a Kiu of similar to 500 mu M. Balanocarpol and ampelopsin A also induced down-regulation of sphingosine kinase 1 expression and reduced DNA synthesis, while balanocarpol stimulated PARP cleavage in MCF-7 breast cancer cells. Resveratrol was a competitive inhibitor (with sphingosine) of sphingosine kinase 1 with a Kic= 160 +/- 40 mu M, reduced sphingosine kinase 1 expression and induced PARP cleavage in MCF-7 cells. Each molecule of balanocarpol may bind at least two sphingosine kinase 1 catalytic molecules to reduce the activity of each simultaneously. These findings suggest that resveratrol, ampelopsin A and balanocarpol could perturb sphingosine kinase 1-mediated signalling and this might explain their activity against MCF-7 breast cancer cells. This article is commented on by Hergst and Yun, pp. 16031604 of this issue. To view this commentary visit

Item type: Article
ID code: 41175
Notes: © 2012 The Authors. British Journal of Pharmacology © 2012 The British Pharmacological Society.
Keywords: resveratrol dimers , novel sphingosine kinase 1 inhibitors , sphingosine kinase 1 expression , cancer cell growth , sphingosine 1-phosphate, ampelopsin A, balanocarpol, inhibitor kinetics, polyADP ribose polymerase, extracellular signal-regulated kinase, resveratrol, proliferation, cancer, apoptosis, sphingosine kinase 1, Pharmacy and materia medica, Pharmacology
Subjects: Medicine > Pharmacy and materia medica
Department: Faculty of Science > Strathclyde Institute of Pharmacy and Biomedical Sciences
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 18 Sep 2012 15:06
    Last modified: 27 Mar 2014 10:31
    URI: http://strathprints.strath.ac.uk/id/eprint/41175

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