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Tri-Calciphor (16,16-dimethyl-15-dehydroprostagalndin B 1 trimer)-mediated mitochondrial Ca 2+ movements: modulation by phosphate
Journal article   Peer reviewed

Tri-Calciphor (16,16-dimethyl-15-dehydroprostagalndin B 1 trimer)-mediated mitochondrial Ca 2+ movements: modulation by phosphate

Salvador Uribe and Thomas M. Devlin
Biochimica et biophysica acta. Molecular basis of disease, v 1225(2)
1994

Abstract

Calcium Calcium ionophore Ischemia Mitochondrion Prostagalndin B 1 Tri-Calciphor
The trimeric derivative of 16,16-dimethyl-15-dehydroprostaglandin B 1 (termed tri-Calciphor), which protects tissues against ischemic damage, induced Ca 2+ efflux and swelling in mitochondria in the absence of phosphate, Mg 2+ and ATP. When glutamate/malate rather than succinate was the substrate, higher tri-Calciphor concentrations were required for the ionophoretic activity. Ca 2+ efflux and mitochondrial swelling induced by tri-Calciphor were completely inhibited by ATP, phopsphate and Mg 2+ added together, and partially inhibited with phosphate plus either ATP or Mg 2+. Between 0 and 7 μM added Ca 2+ and in the presence of phosphate, ATP and Mg 2+, tri-Calciphor stimulated the uptake of Ca 2+ by mitochondria and increased the efficiency of buffering of extramitochondrial Ca 2+. Thus depending on the assay conditions, two different effects involving Ca 2+ movements and mitochondria are observed with tri-Calciphor.

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Web of Science research areas
Biochemistry & Molecular Biology
Biophysics
Cell Biology
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