Sexually Dimorphic Effects of Aging on Rat Somatotropes and Lactotropes

Rossi, Giovanni L.; Bestetti, Gilberto E.; Galbiati, Enrico; Müller, Eugenio E.; Cocchi, Daniela (1991). Sexually Dimorphic Effects of Aging on Rat Somatotropes and Lactotropes. Journal of gerontology, 46(4), B152-B158. The Gerontological Society of America 10.1093/geronj/46.4.B152

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During the aging process modified functions of hypothalamic factors may cause sexually dimorphic changes in pituitary somatotropes and lactotropes. To test this hypothesis, pituitary tissue from young adult (4 months) and old (20–22 months) male and female rats was labeled immunocytochemically for growth hormone (GH) and prolactin (PRL). The total amount of immunoreactive material as well as the total area and number of immunoreactive structures were evaluated. With increasing age the intracellular GH content was moderately increased in male and decreased in female rats. An age-dependent PRL increase, due both to increased cell number and intracellular hormone content, was present only in female rats. The amount of GH- and PRL-immunoreactive material, distributed into classes of increasing density, differed both between sex and age groups. Our results indicate that the aging process of the somatotrope and lactotrope cell populations in rats appears to be different in the two sexes.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Institute of Animal Pathology
05 Veterinary Medicine > Other Institutions > Emeriti, Vetsuisse Faculty

UniBE Contributor:

Rossi, Giovanni Luigi

ISSN:

0022-1422

Publisher:

The Gerontological Society of America

Language:

English

Submitter:

Marceline Brodmann

Date Deposited:

23 Sep 2020 09:35

Last Modified:

23 Sep 2020 09:35

Publisher DOI:

10.1093/geronj/46.4.B152

BORIS DOI:

10.7892/boris.115168

URI:

https://boris.unibe.ch/id/eprint/115168

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