Cited by 56Thyroid Disorders and TreatmentsIon Transport and Channel RegulationIon channel regulation and function

The effects of thyroid hormones on3H-ouabain binding site concentration, Na, K-contents and86Rb-efflux in rat skeletal muscle

Kjeldsen, Keld, Everts, Maria Elisabeth, Clausen, Torben·1986·Pfl�gers Archiv European Journal of Physiology

Abstract

Using a recently developed method based upon vanadate facilitated 3H-ouabain binding, the total concentration of 3H-ouabain binding sites was determined in biopsies of rat skeletal muscles containing varying proportions of slow-twitch fibres. In extensor digitorum longus, diaphragm, gastrocnemius and soleus muscles from mature (12-week-old) hyperthyroid rats the values obtained were respectively 2.6, 3.5, 5.1 and 9.8 times higher than those found in the same muscles from hypothyroid animals. This indicates that the effect of thyroid hormones is more pronounced on slow-twitch than on fast-twitch fibres. The changes in 3H-ouabain binding site concentration with thyroid status could not be accounted for by differences in affinity or the rate of 3H-ouabain binding. In young (4-5 week old) rats, where the K-content and the 3H-ouabain binding site concentration in muscle had been reduced by K-depletion, T3-pretreatment produced an even larger relative increase in the 3H-ouabain binding site concentration than in age-matched controls, but no increase in K-content. Therefore, the downregulation of 3H-ouabain binding sites seen during K-depletion cannot be attributed to a decreased response to thyroid hormones. In normal rats the marked stimulating effect of thyroid hormone on the synthesis of 3H-ouabain binding sites was not associated with any significant change in K-content, but clearly preceded by a significant (P less than 0.001) rise in the efflux of 86Rb.

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Crossref · 10.1007/bf00583377

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  • The total intracellular potassium content measured in the diaphragm muscle of a thyrotoxic mouse is unchanged from the normal.

    “It was seen that the total intracellular potassium content measured in the diaphragm muscle of a thyrotoxic mouse is unchanged from the normal [15].”

    From Thyrotoxic Periodic Paralysis: Clinical Challenges (2014) · cites this paper as [15]

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Authors
Kjeldsen, K., Everts, M. E., & Clausen, T.
Affiliations
Aarhus University (DK)
Venue
Pfl�gers Archiv European Journal of Physiology
Published
1986-05
Volume
406
Issue
5
Pages
529-535
ISSN
  • 0031-6768 (ISSN-L)
  • 1432-2013
OpenAlex
W1985537786
Cited by
56
References
26
Citations by year
2021: 1 · 2015: 1 · 2014: 2 · 2012: 1
FWCI
5.80
Type
journal article
Language
en
Open access
closed
Locations
  • Pflügers Archiv - European Journal of Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion Transport and Channel Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
Keywords
thyroid hormones, ouabain binding sites, Na+/K+-ATPase, skeletal muscle, type I muscle fibers, fast-twitch fibres, hyperthyroidism, hypothyroidism, potassium content, potassium depletion, rubidium efflux, T3, extensor digitorum longus, diaphragm, gastrocnemius, soleus muscle
MeSH terms
Animals, Binding Sites, Female, Muscles, Osmolar Concentration, Ouabain, Potassium, Radioisotopes, Rats, Inbred Strains, Rubidium, Sodium, Thyroid Hormones, Tritium, Rats

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