Abstract
The effect of the alcohol-deterrent drug, disulfiram, on mitochondrial Ca2+ content was studied. Addition of this drug (20 µM) to mitochondria induces a complete loss of accumulated Ca2+. The calcium release is accompanied by a collapse of the transmembrane potential, mitochondrial swelling, and a diminution of the NAD(P)H/NAD(P) radio. These effects of disulfiram depend on Ca2+ accumulation; thus, ruthenium red reestablished the membrane δψ and prevents the oxidation of pyridine nucleotides. The binding of disulfiram to the membrane sulfhydryls appeared to depend on the metabolic state of mitochondria, as well as on the mitochondrial configuration. In addition, it is shown that modification of 9 nmol -SH groups per mg protein suffices to induce the release of accumulated Ca2+.
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Chávez, E., Zazueta, C. & Bravo, C. Extensive Ca2+ release from energized mitochondria induced by disulfiram. J Bioenerg Biomembr 21, 335–345 (1989). https://doi.org/10.1007/BF00762725
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DOI: https://doi.org/10.1007/BF00762725