Further studies on ACTH secretion from pituitary grafts in the hypophysiotrophic area

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Abstract

Resting and stress induced plasma corticosterone concentrations in adult male hypophysectomized rats bearing a pituitary homograft in the hypothalamus were determined fluorimetrically. Plasma corticosterone resting levels were maintained and a significant elevation of these levels in response to stress occurred only in those rats in which the graft was in the medial basal hypothalamus (hypophysiotrophic area, HTA) and the implant was connected with the median eminence. If these latter connections of the graft in the HTA did not exist, resting plasma corticosterone concentrations were reduced and the applied stress did not induce any elevation of the low pre stress levels. On the basis of the present and previous findings, it is assumed that the site of corticotrophin releasing factor production is the median eminence region.

Original languageEnglish
Pages (from-to)18-26
Number of pages9
JournalNeuroendocrinology
Volume17
Issue number1
Publication statusPublished - 1975

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Corticosterone
Adrenocorticotropic Hormone
Median Eminence
Transplants
Middle Hypothalamus
Corticotropin-Releasing Hormone
Hypothalamus
Allografts

ASJC Scopus subject areas

  • Endocrinology
  • Neuroscience(all)

Cite this

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abstract = "Resting and stress induced plasma corticosterone concentrations in adult male hypophysectomized rats bearing a pituitary homograft in the hypothalamus were determined fluorimetrically. Plasma corticosterone resting levels were maintained and a significant elevation of these levels in response to stress occurred only in those rats in which the graft was in the medial basal hypothalamus (hypophysiotrophic area, HTA) and the implant was connected with the median eminence. If these latter connections of the graft in the HTA did not exist, resting plasma corticosterone concentrations were reduced and the applied stress did not induce any elevation of the low pre stress levels. On the basis of the present and previous findings, it is assumed that the site of corticotrophin releasing factor production is the median eminence region.",
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AU - Csernus, V.

AU - Lengvári, I.

AU - Halász, B.

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N2 - Resting and stress induced plasma corticosterone concentrations in adult male hypophysectomized rats bearing a pituitary homograft in the hypothalamus were determined fluorimetrically. Plasma corticosterone resting levels were maintained and a significant elevation of these levels in response to stress occurred only in those rats in which the graft was in the medial basal hypothalamus (hypophysiotrophic area, HTA) and the implant was connected with the median eminence. If these latter connections of the graft in the HTA did not exist, resting plasma corticosterone concentrations were reduced and the applied stress did not induce any elevation of the low pre stress levels. On the basis of the present and previous findings, it is assumed that the site of corticotrophin releasing factor production is the median eminence region.

AB - Resting and stress induced plasma corticosterone concentrations in adult male hypophysectomized rats bearing a pituitary homograft in the hypothalamus were determined fluorimetrically. Plasma corticosterone resting levels were maintained and a significant elevation of these levels in response to stress occurred only in those rats in which the graft was in the medial basal hypothalamus (hypophysiotrophic area, HTA) and the implant was connected with the median eminence. If these latter connections of the graft in the HTA did not exist, resting plasma corticosterone concentrations were reduced and the applied stress did not induce any elevation of the low pre stress levels. On the basis of the present and previous findings, it is assumed that the site of corticotrophin releasing factor production is the median eminence region.

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