Summary
Whereas in rat liver mitochondria the hyperthyroid state causes an increase both in fatty acid unsaturation and in the Ea of D-3-hydroxybutyrate dehydrogenase and a decrease in phase transition temperature, in hyperthyroid rat heart mitochondria these changes are negligible. D-3-hydroxybutyrate dehydrogenase in both the liver and the heart mitochondria of hyperthyroid rats is reduced by about 35% [l2] but this reduction is not due to changes in membrane fluidity in either tissue. Hypothyroidism, on the other hand, affects BDH activity in neither heart nor liver.
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Abbreviations
- BDH:
-
D-3-hydroxybutyrate dehydrogenase
- PTU:
-
6n-propyl-2-thiouracil
- T3,3,3′:
-
5-L-triiodothyronine
- Tm:
-
temperature phase transition
- Ea:
-
apparent activation energy
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Lippolis, R., Morini, P., Conserva, A.R. et al. Concerning the decreased D-3-hydroxybutyrate dehydrogenase activity in the liver and heart of hyperthyroid rats. Mol Cell Biochem 93, 147–152 (1990). https://doi.org/10.1007/BF00226186
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DOI: https://doi.org/10.1007/BF00226186