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Oliveira PJ, Seica R, Santos DL, et al. Vitamin E or coenzyme Q10 administration is not fully advantageous for heart mitochondrial function in diabetic goto kakizaki rats. Mitochondrion. 2004;3(6):337-45doi: 10.1016/j.mito.2004.02.005.
Oliveira, P. J., Seica, R., Santos, D. L., Rolo, A. P., Sardao, V. A., Ferreira, F. M., Palmeira, C. M., Santos, M. S., & Moreno, A. J. (2004). Vitamin E or coenzyme Q10 administration is not fully advantageous for heart mitochondrial function in diabetic goto kakizaki rats. Mitochondrion, 3(6), 337-45. https://doi.org/10.1016/j.mito.2004.02.005
Oliveira, Paulo J, et al. "Vitamin E or coenzyme Q10 administration is not fully advantageous for heart mitochondrial function in diabetic goto kakizaki rats." Mitochondrion vol. 3,6 (2004): 337-45. doi: https://doi.org/10.1016/j.mito.2004.02.005
Oliveira PJ, Seica R, Santos DL, Rolo AP, Sardao VA, Ferreira FM, Palmeira CM, Santos MS, Moreno AJ. Vitamin E or coenzyme Q10 administration is not fully advantageous for heart mitochondrial function in diabetic goto kakizaki rats. Mitochondrion. 2004 May;3(6):337-45. doi: 10.1016/j.mito.2004.02.005. PMID: 16120365.
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Mitochondrion. 2004 May;3(6):337-45. doi: 10.1016/j.mito.2004.02.005.

Vitamin E or coenzyme Q10 administration is not fully advantageous for heart mitochondrial function in diabetic goto kakizaki rats.

Mitochondrion

Paulo J Oliveira, Raquel Seica, Dario L Santos, Anabela P Rolo, Vilma A Sardao, Fernanda M L Ferreira, Carlos M Palmeira, Maria S Santos, Antonio J M Moreno

Affiliations

  1. Center for Neurosciences and Cellular Biology of Coimbra, Department of Zoology, University of Coimbra, P-3004-517 Coimbra, Portugal. [email protected]

PMID: 16120365 DOI: 10.1016/j.mito.2004.02.005

Abstract

The heart is one of the organs affected during the later stages of diabetes. Mitochondrial function has already been proposed to be affected during the course of diabetes. Nevertheless, little information is known concerning the impact of antioxidants in heart mitochondria of a milder model for diabetes, such as the Goto-Kakizaki (GK) rat, where mitochondrial function appears ameliorated. The objective of this work was to test if injections of Vitamin E and Coenzyme Q10, alone and in combination, were able to modify mitochondrial performance in the hearts of GK rats. Several aspects of mitochondrial function were measured, such as the respiratory control ratio and the electric potential, as well as the mitochondrial accumulation of Vitamin E and Coenzymes Q9 and Q10. We observed that only Vitamin E appeared to have a positive impact on the mitochondrial phosphorylation efficiency and on mitochondrial performance, namely on the ability to generate the electric transmembrane potential in the presence of supra-physiological calcium concentrations. Vitamin E administration also increased the mitochondrial concentration of Coenzyme Q10. None of the treatments was able to reverse the diabetic phenotype in GK rats. We conclude that in this model of mild hyperglycemia, administration of antioxidants may have a marginal positive impact on mitochondrial function.

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