Glutamate neurotransmission is affected in prenatally stressed offspring

Authors
Adrover, Ezequiela; Pallares, Maria Eugenia; Baier, Carlos Javier; Monteleone, Melisa Carolina; Giuliani, Fernando Alfredo; Waagepetersen, Helle S.; Brocco, Marcela Adriana; Cabrera, Ricardo José; Sonnewald, Ursula; Schousboe, Arne; Antonelli, Marta Cristina
Publication Year
2015
Language
English
Format
article
Status
Published version
Description
Previous studies from our laboratory have shown that male adult offspring of stressed mothers exhibited higher levels of ionotropic and metabotropic glutamate receptors than control rats. These offspring also showed long-lasting astroglial hypertrophy and a reduced dendritic arborization with synaptic loss. Since metabolism of glutamate is dependent on interactions between neurons and surrounding astroglia, our results suggest that glutamate neurotransmitter pathways might be impaired in the brain of prenatally stressed rats. To study the effect of prenatal stress on the metabolism and neurotransmitter function of glutamate, pregnant rats were subjected to restrain stress during the last week of gestation. Brains of the adult offspring were used to assess glutamate metabolism, uptake and release as well as expression of glutamate receptors and transporters. While glutamate metabolism was not affected it was found that prenatal stress (PS) changed the expression of the transporters, thus, producing a higher level of vesicular vGluT-1 in the frontal cortex (FCx) and elevated levels of GLT1 protein and messenger RNA in the hippocampus (HPC) of adult male PS offspring. We also observed increased uptake capacity for glutamate in the FCx of PS male offspring while no such changes were observed in the HPC. The results show that changes mediated by PS on the adult glutamatergic system are brain region specific. Overall, PS produces long-term changes in the glutamatergic system modulating the expression of glutamate transporters and altering synaptic transmission of the adult brain.
Fil: Adrover, Ezequiela. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Biología Celular y Neurociencias "Profesor Eduardo de Robertis"; Argentina
Fil: Pallares, Maria Eugenia. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Biología Celular y Neurociencias "Profesor Eduardo de Robertis"; Argentina
Fil: Baier, Carlos Javier. Universidad de Buenos Aires; Argentina
Fil: Monteleone, Melisa Carolina. Universidad Nacional de San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Investigaciones Biotecnológicas - Instituto Tecnológico Chascomús. Instituto de Investigaciones Biotecnológicas (sede Chascomús); Argentina
Fil: Giuliani, Fernando Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina
Fil: Waagepetersen, Helle S.. Universidad de Copenhagen; Dinamarca
Fil: Brocco, Marcela Adriana. Universidad Nacional de San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Investigaciones Biotecnológicas - Instituto Tecnológico Chascomús. Instituto de Investigaciones Biotecnológicas (sede Chascomús); Argentina
Fil: Cabrera, Ricardo José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina
Fil: Sonnewald, Ursula. Norwegian University of Science and Technology; Noruega
Fil: Schousboe, Arne. Universidad de Copenhagen; Dinamarca
Fil: Antonelli, Marta Cristina. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Biología Celular y Neurociencias "Profesor Eduardo de Robertis"; Argentina
Subject
GLUTAMATE RELEASE
GLUTAMATE TRANSPORTERS
NMDA RECEPTOR
AMPA RECEPTOR
HIPPOCAMPUS
FRONTAL CORTEX
Bioquímica y Biología Molecular
Ciencias Biológicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/4375