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Nigericin sodium salt is an ionophore that exchanges K+ for H+ across biological membranes.

Lonophore is a lipid-soluble molecule that transports ions across the cell membrane.

In medium with Na+, nigericin scarcely affected ADP-induced platelets aggregation, and slightly inhibited thrombin-induced platelets aggregation. Also, nigericin decreased the cytoplasmic pH in the medium with Na+. The effects of nigericin on platelet aggregation are mainly due to its effects on the cytoplasmic pH [1]. The K+ ionophore nigericin is highly effective as an ionophore for Pb2+. Physiological concentrations of Ca2+ or Mg2+ didn’t inhibit nigericin-catalyzed Pb2+ transport, while K+ and Na+ concentrations (0-100 mM) modestly affected Pb2+ transport. Nigericin may be helpful in the treatment of Pb intoxication [2]. At two concentrations representing the low (5uM) and high ATP (1.5mM) ranges, Nigericin inhibited the ATP-driven transhydrogenase reaction at both ranges with a more pronounced effect on the low ATP concentration. At a concentration of 2.5 mM ATP, nigericin tripled the Oxonol response [3].

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