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Titolo:
Psychosocial stress induces molecular and structural alterations in the brain - How animal experiments help to understand pathomechanisms of depressive illnesses
Autore:
Fuchs, E; Flugge, G;
Indirizzi:
Deutsch Primatenzentrum Gottingen, Abt Neurobiol, D-37077 Gottingen, Germany Deutsch Primatenzentrum Gottingen Gottingen Germany D-37077 gen, Germany
Titolo Testata:
ZEITSCHRIFT FUR PSYCHOSOMATISCHE MEDIZIN UND PSYCHOTHERAPIE
fascicolo: 1, volume: 47, anno: 2001,
pagine: 80 - 97
SICI:
1438-3608(2001)47:1<80:PSIMAS>2.0.ZU;2-I
Fonte:
ISI
Lingua:
GER
Soggetto:
CORTICOTROPIN-RELEASING HORMONE; TREE SHREW; DENTATE GYRUS; PYRAMIDAL NEURONS; TUPAIA-BELANGERI; GLUCOCORTICOID RECEPTORS; ADULT NEUROGENESIS; HUMAN HIPPOCAMPUS; BINDING-SITES; RAT;
Keywords:
psychosocial stress; Tupaia; depression;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Clinical Medicine
Citazioni:
78
Recensione:
Indirizzi per estratti:
Indirizzo: Fuchs, E Deutsch Primatenzentrum Gottingen, Abt Neurobiol, Kellnerweg 4, D-37077 Gottingen, Germany Deutsch Primatenzentrum Gottingen Kellnerweg 4 Gottingen Germany D-37077
Citazione:
E. Fuchs e G. Flugge, "Psychosocial stress induces molecular and structural alterations in the brain - How animal experiments help to understand pathomechanisms of depressive illnesses", Z PSYCHOS M, 47(1), 2001, pp. 80-97

Abstract

Affective disorders are accompanied by central nervous changes that may lead to diseases of brain and peripheral organs. To gain an inside into neurobiological mechanisms that underlie such diseases we are studying tree shrews (Tupaia belangeri). This animal model is based on the fact that male tree shrews are very territorial and that under laboratory conditions, two males establish a clear social rank order with a dominant and a subordinate animal. In the visual presence of the dominant, the subordinate shows all typical signs of stress with pronounced activation of the hypothalamic-pituitary adrenal axis and of the sympathetic nervous system. If there are daily confrontations with the dominant during a time period of several weeks, the subordinate experiences chronic psychosocial stress. Tree shrews can be regarded as a suitable animal model to investigate the neurobiological basis of affective disorders since (1) behavioral and endocrine symptoms of subordinates resemble those of depressive patients, (2) antidepressant treatmentslead to an improvement of symptoms, and (3) also in humans chronic stress can lead to depression. Using this model we showed that chronic stress induces changes in the morphology of hippocampal pyramidal neurons, affects neurogenesis in the hippocampal formation, and changes the expression of glucocorticoid, serotonergicand noradrenergic receptors in the brain. These changes depend on the duration of the stress period with some of the alterations being reversible whereas others persist during a longer time period. Since the above receptors modulate neuronal activity, the stress induced alterations lead to an impairment of neuronal activity in distinct brain regions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 11:48:19