Differential effects of the aging process on the morphology of the hypothalamic ventromedial nucleus of male and female rats.

Abstract:

:We investigated the effects of aging on the neuroanatomical sex dimorphisms of the rat hypothalamic ventromedial nucleus (VMN). Stereological methods were used to estimate the volume of the VMN and the total number and size of its neurons, including their dendritic trees, in males and females aged 6 and 24 months. No cell loss was detected in aged rats. However, in aged females, the volume of the VMN and the somatic size of its neurons were increased, whereas in aged males the dendritic spine density was augmented. Due to these gender-specific effects, the male-female differences observed in the morphology of the VMN in adult rats were annulled in aging. Our findings support the notion that some structural sex dimorphisms in the brain are not stable throughout the life span.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Madeira MD,Ferreira-Silva L,Ruela C,Paula-Barbosa MM

doi

10.1016/s0304-3940(01)02294-7

keywords:

subject

Has Abstract

pub_date

2001-11-13 00:00:00

pages

73-6

issue

1-2

eissn

0304-3940

issn

1872-7972

pii

S0304394001022947

journal_volume

314

pub_type

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