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| DOI | 10.3389/FNMOL.2017.00244 | ||||
| Año | 2017 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Previous studies in rats have demonstrated that chronic restraint stress triggers anhedonia, depressive-like behaviors, anxiety and a reduction in dendritic spine density in hippocampal neurons. In this study, we compared the effect of repeated stress on the expression of alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) and N-methyl-D-aspartate (NMDA) receptor subunits in dorsal and ventral hippocampus (VH). Adult male Sprague-Dawley rats were randomly divided into control and stressed groups, and were daily restrained in their motion (2.5 h/day) during 14 days. We found that chronic stress promotes an increase in c-Fos mRNA levels in both hippocampal areas, although it was observed a reduction in the immunoreactivity at pyramidal cell layer. Furthermore, Arc mRNAs levels were increased in both dorsal and VH, accompanied by an increase in Arc immunoreactivity in dendritic hippocampal layers. Furthermore, stress triggered a reduction in PSD-95 and NR1 protein levels in whole extract of dorsal and VH. Moreover, a reduction in NR2A/NR2B ratio was observed only in dorsal pole. In synaptosomal fractions, we detected a rise in NR1 in dorsal hippocampus (DH). By indirect immunofluorescence we found that NR1 subunits rise, especially in neuropil areas of dorsal, but not VH. In relation to AMPA receptor (AMPAR) subunits, chronic stress did not trigger any change, either in dorsal or ventral hippocampal areas. These data suggest that DH is more sensitive than VH to chronic stress exposure, mainly altering the expression of NMDA receptor (NMDAR) subunits, and probably favors changes in the configuration of this receptor that may influence the function of this area.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | PACHECO-ZAPATA, ANIBAL ALEJANDRO | Hombre |
Universidad de Chile - Chile
|
| 2 | AGUAYO-ABARCA, FELIPE IGNACIO | Hombre |
Universidad de Chile - Chile
|
| 3 | ALIAGA-ROJAS, ESTEBAN ENRIQUE | Hombre |
Universidad Católica del Maule - Chile
|
| 4 | MUNOZ-MORALES, MAURICIO ERNESTO | Mujer |
Universidad de Chile - Chile
|
| 5 | Garcia-Rojo, Gonzalo | Hombre |
Universidad de Chile - Chile
|
| 6 | Antonio Olave, Felipe | Hombre |
Universidad de Chile - Chile
|
| 7 | Parra-Fiedler, Nicolas | Hombre |
Universidad de Chile - Chile
|
| 8 | Garcia-Perez, Alexandra | Mujer |
Universidad de Chile - Chile
|
| 9 | TEJOS-BRAVO, MACARENA VERONICA | Mujer |
Universidad de Chile - Chile
|
| 10 | ROJAS-DOMINGUEZ, PAULINA SOLEDAD | Mujer |
Universidad Nacional Andrés Bello - Chile
|
| 11 | Parra, Claudio S. | Hombre |
Universidad de Chile - Chile
|
| 12 | Fiedler Temer, Jenny Lucy | Mujer |
Universidad de Chile - Chile
|
| Fuente |
|---|
| Universidad de Chile |
| Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT) |
| Fondo Nacional de Desarrollo Científico y Tecnológico |
| Fondo Nacional de Desarrollo CientÃfico y Tecnológico |
| Facultad de Ciencias Físicas y Matemáticas |
| Fondo Central de Investigacion, Universidad de Chile |
| Fondo PEEI, Facultad de Ciencias Quimicas y Farmaceuticas, Universidad de Chile |
| Agradecimiento |
|---|
| This work was supported by Fondo Nacional de Desarrollo Cientifico y Tecnologico (FONDECYT; grant No 108-0489 to JLF), Fondo Central de Investigacion, Universidad de Chile (Grant No ENL025/16 to JLF); Fondo PEEI, Facultad de Ciencias Quimicas y Farmaceuticas, Universidad de Chile. |
| This work was supported by Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT; grant N◦108-0489 to JLF), Fondo Central de Investigación, Universidad de Chile (Grant N◦ ENL025/16 to JLF); Fondo PEEI, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile. |