Neuroendocrinology
Plasma Glucocorticoid Elevation and Ultrastructural Changes in the Adenohypophysis of the Male Rat Following Prolonged Exposure to StressPollard I. · Bassett J.R. · Cairncross K.D.School of Biological Sciences, Macquarie University, North Ryde, New South Wales
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Article / Publication Details
Received: January 30, 1976
Accepted: August 16, 1976
Published online: March 25, 2008
Issue release date: 1976
Number of Print Pages: 19
Number of Figures: 0
Number of Tables: 0
ISSN: 0028-3835 (Print)
eISSN: 1423-0194 (Online)
For additional information: https://www.karger.com/NEN
Abstract
A morphological and ultrastructural study is described which indicates that cellular activity in the adenohypophysis correlates well with the circulating levels of corticosterone. Intense secretory activity is observed in all tropic cells of the adenohypophysis over 10 days; thereafter the cellular morphology shows a return to the control condition. There are, however, differences in the degree of adaptation between the different tropic cells. After its initial hyperactivity, corticotrope activity returned to a control level by 20 days. Thyrotrope activity was also found to adapt to control activity, but only after 40 days. Similar patterns were observed in the somatotrope and gonadotrope, where the initial hypertrophy returned to control levels by 20 days; thereafter, however, an inhibition was observed. The luteotrope however, seems to be an exception in that its level of activity increased throughout the duration of the stress procedure.
© 1976 S. Karger AG, Basel
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Article / Publication Details
Received: January 30, 1976
Accepted: August 16, 1976
Published online: March 25, 2008
Issue release date: 1976
Number of Print Pages: 19
Number of Figures: 0
Number of Tables: 0
ISSN: 0028-3835 (Print)
eISSN: 1423-0194 (Online)
For additional information: https://www.karger.com/NEN
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