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Effects of iodine upon the structure and function of mitochondria

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Abstract

The influence of iodine in its positive and negative monovalent form upon the oxygen consumption in euthyroid and thyroidectomized rats and the oxidative phosphorylation in liver mitochondria isolated from both groups of animals, as well as the spontaneous swelling and total ATPase activity of mitochondria have been studied.

It was established that the administration of ICI increased the oxygen consumption of normal and thyroidectomized rats while under the same conditions no effect was found with NaI. IBr stimulated the oxygen consumptionin vitro in liver mitochondria isolated both from normal and thyroidectomized rats and decreased the P/O ratio while NaI had no effect. I2 and IBr increased the swelling and inhibited the ATPase activity of isolated rat liver mitochondria, while these effects were not observed when KI was used. The thyroidstatic 1-methyl-2-mercaptoimidazol decreased the stimulating effect of iodine upon the swelling of mitochondria and to a certain extent lowered its inhibiting effect upon the ATPase activity.

It is concluded that iodine in its positive monovalent form has a thyroxine-like effect upon the structure and function of isolated rat liver mitochondria, as well asin vivo upon the respiration of euthyroid and thyroidectomized rats.

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Author notes

  1. O. A. Dimitrov

    Present address: Department of Human and Animal Physiology, University of Sofia, Sofia, Bulgaria

  2. P. B. Penchev

    Present address: Institute of Nutrition, Bulgarian Academy of Sciences, Sofia

  3. I. Dekov

    Present address: Central Laboratory of Biophysics, Bulgarian Academy of Sciences, Sofia, Bulgaria

Authors and Affiliations

  1. Institute of Biochemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria

    R. R. Rachev, O. A. Dimitrov, E. H. Philipova, P. B. Penchev & I. Dekov

Authors
  1. R. R. Rachev
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  2. O. A. Dimitrov
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  3. E. H. Philipova
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  4. P. B. Penchev
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  5. I. Dekov
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Rachev, R.R., Dimitrov, O.A., Philipova, E.H. et al. Effects of iodine upon the structure and function of mitochondria. J Bioenerg Biomembr 5, 17–25 (1973). https://doi.org/10.1007/BF01458354

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  • DOI: https://doi.org/10.1007/BF01458354

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