Contribution of the Roman rat lines/strains to personality neuroscience : neurobehavioral modeling of internalizing/externalizing psychopathologies
Fernández-Teruel, Alberto (Universitat Autònoma de Barcelona. Departament de Psiquiatria i de Medicina Legal)
Cañete, Toni (Universitat Autònoma de Barcelona. Departament de Psiquiatria i de Medicina Legal)
Sampedro-Viana, Daniel (Universitat Autònoma de Barcelona. Departament de Psiquiatria i de Medicina Legal)
Oliveras, Ignasi (Universitat Autònoma de Barcelona. Departament de Psiquiatria i de Medicina Legal)
Torrúbia, Rafael (Universitat Autònoma de Barcelona. Departament de Psiquiatria i de Medicina Legal)
Tobeña, Adolf 1950- (Universitat Autònoma de Barcelona. Departament de Psiquiatria i de Medicina Legal)
Universitat Autònoma de Barcelona. Institut de Neurociències

Date:	2023
Description:	9 pàg.
Abstract:	The Roman high-avoidance (RHA) and low-avoidance (RLA) rat lines/strains were established in Rome through bidirectional selection of Wistar rats for rapid (RHA) or extremely poor (RLA) acquisition of a two-way active avoidance task. Relative to RHAs, RLA rats exhibit enhanced threat sensitivity, anxiety, fear and vulnerability to stress, a passive coping style and increased sensitivity to frustration. Thus, RLA rats' phenotypic profile falls well within the "internalizing" behavior spectrum. Compared with RLAs and other rat strains/stocks, RHAs present increased impulsivity and reward sensitivity, deficits in social behavior and attentional/cognitive processes, novelty-induced hyper-locomotion and vulnerability to psychostimulant sensitization and drug addiction. Thus, RHA rats' phenotypes are consistent with a "disinhibiting externalizing" profile. Many neurobiological/molecular traits differentiate both rat lines/strains. For example, relative to RLA rats, RHAs exhibit decreased function of the prefrontal cortex (PFC), hippocampus and amygdala, increased functional tone of the mesolimbic dopamine system, a deficit of central metabotropic glutamate-2 (mGlu2) receptors, increased density of serotonin 5-HT2A receptors in the PFC, impairment of GABAergic transmission in the PFC, alterations of several synaptic markers and increased density of pyramidal immature dendrític spines in the PFC. These characteristics suggest an immature brain of RHA rats and are reminiscent of schizophrenia features like hypofrontality and disruption of the excitation/inhibition cortical balance. We review evidence supporting RLA rats as a valid model of anxiety/fear, stress and frustration vulnerability, whereas RHA rats represent a promising translational model of neurodevelopmental alterations related to impulsivity, schizophrenia-relevant features and comorbidity with drug addiction vulnerability.
Grants:	Agencia Estatal de Investigación PID2020-114697GB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021-SGR-00557
Note:	Altres ajuts: acords transformatius de la UAB
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Externalizing disorders ; Internalizing disorders ; Neurobiology ; Reward sensitivity ; Roman high- and low-avoidance rats ; Threat sensitivity ; SDG 3 - Good Health and Well-being
Published in:	Personality Neuroscience, Vol. 6 (2023) , p. e8, ISSN 2513-9886

DOI: 10.1017/pen.2023.7
PMID: 38107777

9 p, 374.8 KB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Health sciences and biosciences > Institut de Neurociències (INc)
Articles > Research articles
Articles > Published articles