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The reorganization of the neurohypophyseal stalk following hypophysectomy in the rat


, : The reorganization of the neurohypophyseal stalk following hypophysectomy in the rat. Endocrinology 56(6): 704-717

The proximal end of the severed pituitary stalk in the totally hypophysectomized rat was studied from 3 days to 5.5 months following operation. The proximal end of the severed stalk becomes reorganized into new neural lobe tissue capable of storing neuro-secretory material containing the posterior lobe hormones. In addition, the functional competence of the reorganized neurohypophysis was explored. Mobilization of the neurosecretory substance from the reconstituted structure could not be detected when dehydration procedures were used alone. However, adrenal cortical substitution therapy plus dehydration caused the reorganized neurohypophysis to be depleted of neurosecretory material. Thus, morphological evidence is presented to the effect that the reorganized neurohypophysis could be a possible source of the antidiuretic substance found in the blood of the hypophysectomized rat by other investigators.

US$19.90

PMID: 14391260

DOI: 10.1210/endo-56-6-704


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