Skip to main content
Log in

αGPD response to the continuous infusion of thyroxine into the hypothyroid rat

  • Published:
Journal of Endocrinological Investigation Aims and scope Submit manuscript

Abstract

In the present work we have studied the disappearance of the mitochondrial enzyme alpha-glycerophosphate dehydrogenase (αGPD) after thyroidectomy, as well as the induction by the continuous infusion of physiological doses of thyroxine to hypothyroid male rats in three different tissues, the liver, kidney and heart. Rats were previously rendered hypothyroid by surgical thyroidectomy and enzyme activity was determined at different time intervals following the ablation of the gland. Levels of αGPD are specifically regulated in each tissue, as both its rate of disappearance after thyroidectomy and the rate of appearance during T4 treatment are different in the liver, the kidney and the heart. Such results suggest the existence of local factors which can modify the response generated by the thyroid hormone in individual tissues.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. Lee Y.P., Takemori A.E., Lardy H. Enhanced oxidation of α-glycerophosphate by mitochondria of thyroid-fed rats. J. Biol. Chem. 234: 3041, 1959.

    Google Scholar 

  2. Lee Y.P., Lardy H. Influence of thyroid hormones on L-α-glycerophosphate dehydrogenases and other dehydrogenases in various organs of the rat. J. Biol. Chem. 240: 1427, 1965.

    PubMed  CAS  Google Scholar 

  3. Oppenheimer J.H., Silva J.E., Schwartz H.L., Surk M.I. Stimulation of hepatic mitochondrial α-glycerophosphate dehydrogenase and malic enzyme by L-triiodothyronine. J. Clin. Invest. 59: 517, 1977.

    Article  PubMed Central  PubMed  CAS  Google Scholar 

  4. Wilson E.J., McMurray W.C. Regulation of malic enzyme and mitochondrial α-glycerophosphate dehydrogenase by thyroid hormones, insulin and glucocorticoids in cultured hepatocytes. J. Biol. Chem. 256: 11657, 1981.

    PubMed  CAS  Google Scholar 

  5. Tarentino A.L., Richert D.A., Westerfeld W.W. The current induction of hepatic α-glycerophosphate dehydrogenase and malate dehydrogenase by thyroid hormone. Biochim. Biophys. Acta 124: 295, 1966.

    Article  CAS  Google Scholar 

  6. Sellinger O.Z., Lee K.L. The induction of mitochondrial α-glycerophosphate dehydrogenase by thyroid hormone: evidence for enzyme synthesis. Biochim. Biophys. Acta 91: 183, 1964.

    PubMed  CAS  Google Scholar 

  7. Larsen R.P., Frumess R.D. Comparison of the biological effects of thyroxine and triiodothyronine in the rat. Endocrinology 100: 980, 1977.

    Article  PubMed  CAS  Google Scholar 

  8. Obregon M.J., Pascual A., Morreale G., Escobar F. Pituitary and plasma thyrotropin, thyroxine and triiodothyronine after hyperthyroidism. Endocrinology 104: 1467, 1979.

    Article  PubMed  CAS  Google Scholar 

  9. Benotti J., Benotti N. Protein bound iodine, total iodine and butanol extractable iodine by partial automation. Clin. Chem. 9: 408, 1963.

    CAS  Google Scholar 

  10. Snedecor G.W. Statistical methods, ed. 5. Iowa State University Press, Ames, 1956.

    Google Scholar 

  11. Goswami A., Rosenberg I.N. Iodothyronine 5′-deiodinase in rat kidney microsomes. Kinetic behavior at low substrate concentration. J. Clin. Invest. 74: 2097, 1984.

    Article  PubMed Central  PubMed  CAS  Google Scholar 

  12. Silva E., Matthews P. Thyroid hormone metabolism and the source of plasma triiodothyronine in 2-weeks-old rats: effects of thyroid status. Endocrinology 114: 2394, 1984.

    Article  PubMed  CAS  Google Scholar 

  13. Kaplan M.M. Thyroxine 5′-monodeiodination in rat anterior pituitary homogenate. Endocrinology 106: 567, 1980.

    Article  PubMed  CAS  Google Scholar 

  14. Pascual A., Obregon M.J., Morreale de Escobar G. Tyrosine hydroxylase and the conversion of L-thyroxine into 3′,3,5-triiodo-L-thyronine in the rat. Endocrinology 104: 1574, 1979.

    Article  PubMed  CAS  Google Scholar 

  15. Oppenheimer J.H., Schwartz H.L. Factors determining the level of activity of 3,5,3′-triiodothyronine-responsive hepatic enzymes in the starved rat. Endocrinology 107: 1460, 1980.

    Article  PubMed  CAS  Google Scholar 

  16. Tibaldi J.M., Sahnoun N., Surks M.I. Response of hepatic mitochondrial α-glycerophosphate dehydrogenase and malic enzyme to constant infusions of L-triiodothyronine in rats bearing the Walker 256 carcinoma. Evidence for divergent postreceptor regulation of the thyroid hormone response. J. Clin. Invest. 74: 705, 1984.

    Article  PubMed Central  PubMed  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Pascual, A. αGPD response to the continuous infusion of thyroxine into the hypothyroid rat. J Endocrinol Invest 10, 55–58 (1987). https://doi.org/10.1007/BF03347154

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF03347154

Key-words

Navigation