Summary
This paper reports a stereological study of the cellular aspects of development of the adrenal cortex of male and female rats in the course of maturation. Rats of the Wistar strain were studied at weekly intervals from day 21 to day 77 of postnatal life.
From day 42 homogenates of adrenals from female rats produced more corticosterone than homogenates from males of corresponding age. In the strain of rats studied sex differences in adrenal weight appeared at about day 49. From this day onward relative, and subsequently absolute adrenal weights were higher in females than in males. In the course of maturation the total volume of all adrenocortical zones gradually increased. From day 70 the zona glomerulosa and from day 49 the zona fasciculata were larger in female than in male rats, while no distinct sex difference was observed in the volume of the zona reticularis.
The appearance of sex-related differences in the adrenal cortex depends mainly on changes in the zona fasciculata, the cells of which markedly increased in volume in female rats by comparison with males. The total number of all adrenocortical cells increased from ca 13 million on day 21 to ca 25 million on day 77 and at all intervals studied adrenal glands of male and female rats contained a similar number of parenchymal cells.
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Supported in part by a grant from the Committee of Zoology, Polish Academy of Sciences
In partial fulfillment of the Ph.D. thesis requirement of the Poznań Academy of Medicine, Poznań, Poland
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Majchrzak, M., Malendowicz, L.K. Sex differences in adrenocortical structure and function. Cell Tissue Res. 232, 457–469 (1983). https://doi.org/10.1007/BF00213800
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DOI: https://doi.org/10.1007/BF00213800