Summary
The central nervous system and the pituitary of adrenalectomized male rats injected with 3H-dexamethasone were examined by radioautography. At 1 hr after the injection, radioactivity concentration was high in the medial basal hypothalamus, the pituitary and the pineal gland. In the hypothalamus, radioactive material was found to be selectively concentrated in neurons in the ventral part of nucleus arcuatus and in the infundibular region. In the anterior pituitary, a large proportion of cells showed silver grains both in the cytoplasm and over the cell nuclei. However, in a small number of cells, the radioactive material was associated with the cell nuclei. Less radioactivity was present in the intermediate and posterior lobes. The pineal gland contained more silver grains than did other regions of the brain. The results obtained in the present study suggest essentially an action of dexamethasone in the medial basal hypothalamus and at the level of the pituitary.
Similar content being viewed by others
References
Arimura, A., Bowers, C. Y., Schally, A. V., Saito, M., Miller, M. C.: Effect of corticotrophinreleasing factor, dexamethasone and actinomycin D on the release of ACTH from rat pituitaries in vivo and in vitro. Endocrinology 85, 300–311 (1969)
Bohus, B., Endröczi, E.: Effect of intracerebral implantation of hydrocortisone on adreno-cortical secretion and adrenal weight after unilateral adrenalectomy. Acta physiol. Acad. Sci. hung. 25, 11–19 (1964)
Corbin, A., Mangili, G., Motta, M., Martini, L.: Effect of hypothalamic and mesencephalic steroid implantations on ACTH feedback mechanisms. Endocrinology 76, 811–818 (1965).
Davidson, J. M., Feldman, S.: Cerebral involvement in the inhibition of ACTH secretion by hydrocortisone. Endocrinology 72, 936–946 (1963)
Davidson, J. M., Jones, L. E., Levine, S.: Feedback regulation of adrenocorticotropin secretion in “basal” and “stress” conditions: acute and chronic effects of intrahypothalamic corticoid implantation. Endocrinology 82, 655–663 (1968)
De Kloet, E. R., Van der Vies, J., De Wied, D.: The site of the suppressive action of dexamethasone on pituitary-adrenal activity. Endocrinology 94, 61–73 (1974)
De Wied, D.: The site of the blocking action of dexamethasone on stress-induced pituitary ACTH release. J. Endocrin. 29, 29–37 (1964)
Endröczi, E., Lissak, K., Tekeres, M.: Hormonal feedback regulation of pituitary-adrenocortical activity. Acta physiol. Acad. Sci. hung. 18, 291–299 (1961)
Feldman, D., Funder, J. W., Edelman, I. S.: Evidence for a new class of corticosterone receptors in the rat kidney. Endocrinology 92, 1429–1441 (1973)
Fleischer, N., Rawls, W. E.: ACTH synthesis and release in pituitary monolayer culture; effect of dexamethasone. Amer. J. Physiol. 219, 445–448 (1970)
Fuxe, K., Hökfelt, T., Nilsson, O.: Castration, sex hormones and tubero-infundibular dopamine neurons. Neuroendocrinology 5, 107–120 (1969)
Ganong, W. F., Hume, D.M.: Effect of hypothalamic lesions on steroid-induced atrophy of adrenal cortex in the dog. Proc. Soc. exp. Biol. (N.Y.) 88, 528–533 (1955)
Gerlach, J. L., McEwen, B. S.: Rat brain binds adrenal steriod hormone: radioautography of hippocampus with corticosterone. Science 175, 1133–1136 (1972)
Gosbee, J. L., Kraicer, J., Kastin, A. J., Schally, A. V.: Functional relationship between the pars intermedia and ACTH secretion in the rat. Endocrinology 86, 560–567 (1970)
Grimm, Y., Kendall, J. W.: A study of feedback suppression of ACTH secretion utilizing glucocorticoid implants in the hypothalamus: The comparative effects of cortisol, corticosterone and their 21-acetates. Neuroendocrinology 3, 55–63 (1968)
Kinson, G. A., Singer, B., Grant, L.: Adrenocortical hormone secretion at various time intervals after pinealectomy in the rat. Gen. comp. Endocr. 10, 447–49 (1968)
Kinson, G., Wahid, A. K., Singer, B.: Effect of chronic pinealectomy on adrenocortical hormone. Secretion rates in normal and hypertensive rats. Gen. comp. Endocr. 8, 445–454 (1967)
Koch, B., Bucher, B., Mialhe, C.: Pituitary nuclear retention of dexamethasone and ACTH biosynthesis. Neuroendocrinology 15, 365–375 (1974)
Leeman, S. E., Glenister, D. W., Yates, F. E.: Characterization of a calf hypothalamic extract with adrenocorticotropin releasing properties; evidence for a central nervous system site for corticosteroid inhibition of adrenocorticotropin release. Endocrinology 70, 249–262 (1962)
McCann, S. M., Fruit, A., Fulford, B. D.: Studies on the loci of action of cortical hormones in inhibiting the release of adrenocorticotrophin. Endocrinology 63, 29–42 (1958)
Mialhe, C., Lutz, B.: Libération des hormones antidiurétique et corticotrope au cours de différents types d'agressions. Dans: Neuroendocrinologie, ed. Benoit, J. and Kordon, C., Centre National de la Recherche Scientifique, Paris, No. 927, 163–172 (1970)
Mialhe-Voloss, C.: Posthypophyse et activité corticotrope. Acta endocr. (Kbh.), Suppl. 35, 1–96 (1958)
Rochefort, G. J., Rosenberger, J., Saffran, M.: Depletion of pituitary corticotrophin by various stresses and by neurohypophysial preparations. J. Physiol. (Lond.) 146, 105–116 (1959)
Rose, S., Nelson, J.: Hydrocortisone and ACTH release. Austr. J. exp. Biol. Med. Sc. 34, 77–80 (1956)
Russell, S. M., Dhariwal, A. P. S., McCann, S. M., Yates, F. E.: Inhibition by dexamethasone of the in vivo pituitary response to corticotropin releasing factor (CRF). Endocrinology 85, 512–521 (1969)
Schapiro, S., Marmorston, J., Sobel, H.: The steroid feedback mechanism. Amer. J. Physiol. 192, 58–62 (1958)
Scott, A. P., Lowry, P. J., Ratcliffe, J. G., Rees, L. H., Landon, J.: Corticotrophin-like peptides in the rat pituitary. J. Endocr. 61, 355–367 (1974)
Smelik, P. G.: The regulation of ACTH secretion. Acta physiol. pharmacol. neer. 13, 370–371 (1965)
Smelik, P. G., Sawyer, C. H.: Effects of implantation of cortisol into the brain stem or pituitary gland on the adrenal response to stress in the rabbit. Acta endocr. (Kbh.) 41, 561–570 (1962)
Stark, E., Makara, G. B., Marton, J., Palkovits, M.: ACTH release in rats after removal of the medial hypothalamus. Neuroendocrinology 13, 224–233 (1973/74)
Stoeckel, M. E., Dellmann, H. D., Porte, A., Klein, M. J., Stutinsky, F.: Corticotrophic cells in the rostral zone of the pars intermedia and in the adjacent neurohypophysis of the rat and mouse. Z. Zellforsch. 136, 97–110 (1973)
Stumpf, W. E.: Autoradiographic techniques and the localization of estrogen, androgen, and glucocorticoid in the pituitary and brain. Amer. Zoologist 11, 725–739 (1971)
Stumpf, W. E., Sar, M.: Hormonal inputs to releasing factor cells, feedback sites. In: Progress in Brain Research, (eds.) Zimmermann, E., Gipsen, W. H., Marks, B. H., De Wied, D., vol. 39, p. 53–71. Amsterdam: Elsevier Scientific publishing company 1973
Warembourg, M.: Fixation de l'oestradiol 3H au niveau des noyaux amygdaliens, septaux, et du système hypothalamo-hypophysaire chez la souris femelle. C. R. Acad. Sci. (Paris) 270, 152–154 (1970)
Warembourg, M.: Radioautographic study of the guinea pig uterus after injection and incubation with 3H-progesterone. Endocrinology 94, 665–670 (1974)
Warembourg, M.: Etude radioautographique des rétroactions centrales des corticostéroides 3H chez le rat et le cobaye. Dans: Neuroendocrinologie de l'axe corticotrope, eds. P. Dell, vol. 22, p. 41–65. Paris: Editions INSERM 1973
Warembourg, M.: Radioautographic study of the rat brain after injection of 1–2 3H-corticosterone. Brain Res. 89, 61–70 (1975)
Yetes, F. E., Russel, S. M., Dallman, M. F., Hedge, G. A., McCann, S. M., Dhariwal, A. P. S.: Potentiation by vasopressin of corticotropin release induced by corticotropin-releasing factor. Endocrinology 88, 3–15 (1971)
Author information
Authors and Affiliations
Additional information
This study was supported by grants from the INSERM and DGRST n∘ 74-7-0518.
Rights and permissions
About this article
Cite this article
Warembourg, M. Radioautographic study of the rat brain and pituitary after injection of 3H dexamethasone. Cell Tissue Res. 161, 183–191 (1975). https://doi.org/10.1007/BF00220367
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00220367