Potential neuronal mechanisms of estrogen actions in synaptogenesis and synaptic plasticity.

Abstract:

:1. Studies conducted on the rat arcuate nucleus, an area involved in the development and control of LH and FSH secretion, have shown the existence of hormonally regulated developmental sex differences in synaptic patterns and estrogen-induced synaptic plasticity during adult life. Several questions raised by these findings are examined in this review: 2. The mechanisms of estrogen-regulated developmental synaptogenesis. These include the role of glycocalyx glycoproteins in neuronal membranes, neural cell adhesion molecules, and insulin-like growth factor I. 3. The relationship among circulating estrogen, gonadotropin levels, and hypothalamic synaptic plasticity. Recent evidence for the role of GABAergic and dopaminergic synaptic inputs and POMC projections from the arcuate nucleus to the GnRH cells is discussed. 4. The synaptologic basis of age-related failure of positive feedback. The role of the cumulative effect of repeated preovulatory synaptic retraction and reapplication cycles on sensescent constant estrus is analyzed.

journal_name

Cell Mol Neurobiol

authors

Naftolin F,Leranth C,Horvath TL,Garcia-Segura LM

doi

10.1007/BF02088177

subject

Has Abstract

pub_date

1996-04-01 00:00:00

pages

213-23

issue

2

eissn

0272-4340

issn

1573-6830

journal_volume

16

pub_type

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