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Titolo:
Variations of synaptotagmin I, synaptotagmin IV, and synaptophysin mRNA levels in rat hippocampus during the estrous cycle
Autore:
Crispino, M; Stone, DJ; Wei, M; Anderson, CP; Tocco, G; Finch, CE; Baudry, M;
Indirizzi:
Univ So Calif, Neurosci Program, Los Angeles, CA 90089 USA Univ So Calif Los Angeles CA USA 90089 Program, Los Angeles, CA 90089 USA
Titolo Testata:
EXPERIMENTAL NEUROLOGY
fascicolo: 2, volume: 159, anno: 1999,
pagine: 574 - 583
SICI:
0014-4886(199910)159:2<574:VOSISI>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
DENDRITIC SPINE DENSITY; MESSENGER-RIBONUCLEIC-ACID; KAINATE-INDUCED CURRENTS; SMALL SYNAPTIC VESICLES; MEMBRANE-PROTEIN; NEUROTRANSMITTER RELEASE; ARCUATE NUCLEUS; NERVE-TERMINALS; CORE VESICLES; ADULT-RATS;
Keywords:
synaptotagmin; synaptophysin; estrous cycle; mRNA; in situ hybridization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
67
Recensione:
Indirizzi per estratti:
Indirizzo: Crispino, M Univ So Calif, Neurosci Program, Los Angeles, CA 90089 USA Univ So Calif Los Angeles CA USA 90089 Angeles, CA 90089 USA
Citazione:
M. Crispino et al., "Variations of synaptotagmin I, synaptotagmin IV, and synaptophysin mRNA levels in rat hippocampus during the estrous cycle", EXP NEUROL, 159(2), 1999, pp. 574-583

Abstract

Periodic changes in ovarian steroid levels during fertility cycles affect learning both in humans and in rats in parallel with electrophysiological and morphological fluctuations in selective neuronal populations. In particular, during the estrous cycle of the female rat, hippocampal CA1 region undergoes cyclic modifications in synaptic density. To investigate the molecular mechanisms involved in synaptic remodeling during the estrous cycle, me analyzed the expression of three presynaptic markers, synaptotagmin I, synaptotagmin IV, and synaptophysin, in the female adult rat brain by in situ hybridization. Relative abundance in mRNA for these three markers was quantified at four phases of the estrous cycle: diestrus, proestrus (AM and PM), and estrus. mRNA levels for syt1 exhibited cyclic variations in pyramidal neurons of the CA3 region of hippocampus during the estrous cycle, while mRNA levels for syt4 and SYN were relatively invariant in this or other regions of the hippocampus, Because CA3 pyramidal neurons make synaptic contacts in CA1, modulation of syt1 expression in CA3 may participate in the changesin synaptic density observed in CA1 during the estrous cycle. Furthermore,both syt1 and SYN mRNA varied cyclically in layer II, but not in layer IIIof entorhinal cortex, while syt4 remained unchanged throughout the cycle. These data suggest that regular variations in steroid hormone levels duringfertility cycles may alter the properties of several networks involved in information processing and learning and memory through altered levels of presynaptic proteins. (C) 1999 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/01/21 alle ore 22:28:27