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. 1967 Aug 1;50(7):1849–1864. doi: 10.1085/jgp.50.7.1849

In Vivo Effect of Uncoupling Agents on the Incorporation of Calcium and Strontium into Mitochondria and Other Subcellular Fractions of Rat Liver

E Carafoli 1
PMCID: PMC2225758  PMID: 6050970

Abstract

After injection of 45Ca++ or 89Sr++ into rats, the largest part of the radioactivity in the liver cell is associated with the subcellular structures, only negligible amounts of it being found in the soluble hyaloplasm. 50 % or more of the 45Ca++ and 89Sr++ in the liver cell is recovered in the mitochondrial fraction. The specific activity of Ca++ after injection of 45Ca++ is far greater in mitochondria than in microsomes. Pretreatment of the rats with uncouplers of oxidative phosphorylation markedly decreases the amount of radioactivity associated with the mitochondrial fraction. The amount of radioactivity recovered in the microsomes and in the final supernatant on the contrary increases. These effects are present only when mitochondrial oxidative phosphorylation is completely uncoupled. The Ca++ content of mitochondria from the livers of rats pretreated with uncouplers is sharply decreased with respect to the controls. It is concluded that in the liver cells of the intact animal energy-linked movements of Ca++ and Sr++ take place in mitochondria.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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