THE INFLUENCE OF METHALLIBURE (ICI 33,828) ON SERUM AND PITUITARY THYROID-STIMULATING HORMONE LEVELS IN THE RAT
| Autor: | Simon W. Manley, J. R. Bourke, R. W. Hawker |
|---|---|
| Rok vydání: | 1971 |
| Předmět: |
Male
endocrine system medicine.medical_specialty endocrine system diseases Somatotropic cell Endocrinology Diabetes and Metabolism Thyroid Gland Thyrotropin Gonadotropic cell Feedback Endocrinology Thyroid-stimulating hormone Thyrotropic cell Internal medicine medicine Animals Methallibure Propylamines business.industry Body Weight Seminal Vesicles Organ Size Stimulation Chemical Rats Semicarbazides Depression Chemical Pituitary Gland Biological Assay Female Secretory Rate business Endocrine gland |
| Zdroj: | Journal of Endocrinology. 49:569-572 |
| ISSN: | 1479-6805 0022-0795 |
| DOI: | 10.1677/joe.0.0490569 |
| Popis: | SUMMARY The effect of methallibure (ICI 33,828), a non-steroidal pituitary inhibitor, on serum and pituitary thyroid-stimulating hormone (TSH) levels has been investigated. A biphasic action of the drug on serum TSH levels was observed, the greatest falls occurring with the lowest doses (2mg/day). Increasing dose and period of administration induced progressive decreases in pituitary TSH content. These results are interpreted in terms of three actions on the thyroid—pituitary system: (1) inhibition of the release of TSH from the pituitary, (2) inhibition of TSH synthesis evident only at higher doses, and (3) a thyroid-blocking action, which is also only observed at the higher dose levels, with consequent pituitary stimulation via the thyroid—pituitary feedback mechanism. Effects upon body weight and weight of endocrine organs are reported, that upon the seminal vesicles being the most marked. |
| Databáze: | OpenAIRE |
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