Activation of antihypoxic program under the action of a number of transition and heavy metals has been studied using cell-based HIF1 ODD-luc and HRE-luc reporters. It has been demonstrated that Au3+, Pb2+, Sn2+, Hg2+ are weak HIF1 ODD-luc activators, likely reflecting their weak competition for the ironbinding site in the active center of HIF prolyl hydroxylase. Metals capable of replacing iron–Mn2+, Zn2+, Cu2+ и Ni2+–activate at high submillimolar concentrations, which indicates low permeability of the cell membrane for transition metals. The highest activation is observed for Co2+ and Cd2+, however, Cd2+ is highly toxic even at 10 μM, in contrast to Co2+, which activates both reporters without toxicity signs up to 25 μM for 24 h. A significant activation by Co2+ is observed already in low micromolar range of concentrations, which can be recommended for use in hypoxia mimicking.
Moscow University Chemistry Bulletin – Springer Journals
Published: May 30, 2018
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