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. 2015 Sep 28;10(9):e0137321. doi: 10.1371/journal.pone.0137321

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© 2015 Nutter et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 1 — NRK49F cells were serum starved overnight together with increasing concentrations of the MEK inhibitor CI-1040 prior to stimulation with 10% foetal bovine serum. pERK1/2 expression was assessed by western blotting with calnexin as a loading control (1a). CI-1040 treatment leads to a dose-dependent reduction in pERK1/2 expression as a percentage of control (n = 3). Cell proliferation as assessed by BrdU ELISA (1b) shows CI-1040 at doses between 100nM and 10,000nM has no significant effect on cell proliferation (closed circles). Viability assays (1b, closed triangles) determined CI-1040 was cytotoxic at doses higher than 10,00nM (assay performed 3 times in triplicate. V to refers vehicle only. + refers to FBS-stimulated cells and–refers to non-stimulated cells.