[Inhibition of the biosynthesis of thyroglobulin in the thyroid gland of rats by isoniazid]

Alfredo Pontecorvi, M. De Luca, C. Carducci, M. D'Armiento, J. Roche

Risultato della ricerca: Contributo in rivistaArticolo in rivista

Abstract

Groups of rats have been treated for one month with a daily dose of 50 mg/kg of body weight/day of isoniazide a product used therapeutically in man against tuberculosis. The animals submitted to this experiment showed an increase of thyroid weight (39%) and a decrease of its content in water soluble proteins, including thyroglobulin and precursors. These proteins have been labeled in vitro by [3H]-4,5-L-leucine and by [3H]-galactose, by incubation of isolated glands during 4 h in a medium containing this labeled marker. The decrease of thyroglobulin-like proteins was of 20-37% for [3H]-D-1-galactose, labeled fraction and of 46-53% for the [3H]-leucine labeled fraction. Two thirds of the radioactive protein sedimented by ultracentrifugation in a sucrose gradient were present in a 12S monomer of thyroglobulin. This suggests an impairment of biosynthesis of 19S thyroglobulin, in which two of the subunit are associated. Under experimental conditions adopted this 19S protein was labeled by [3H]-leucine, but not by [3H]-galactose. Two other antituberculous agents studied, ethambutol and rifamizine, exerted not the same effects on thyroid gland in rats. Therefore a control of thyroid function appear to be necessarily only in man treated by isoniazine.
Titolo tradotto del contributo[Autom. eng. transl.] [Inhibition of the biosynthesis of thyroglobulin in the thyroid gland of rats by isoniazid]
Lingua originaleFrench
pagine (da-a)613-618
Numero di pagine6
RivistaComptes Rendus des Seances de la Societe de Biologie et de Ses Filiales
Volume176
Stato di pubblicazionePubblicato - 1982

Keywords

  • Animals
  • Isoniazid
  • Male
  • Organ Size
  • Rats
  • Rats, Inbred Strains
  • Thyroglobulin
  • Thyroid Gland

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