ß-Catenin Role in the Vulnerability/Resilience to Stress-Related Disorders Is Associated to Changes in the Serotonergic System.
Mol Neurobiol
; 57(3): 1704-1715, 2020 Mar.
Article
en En
| MEDLINE
| ID: mdl-31823197
ABSTRACT
We previously reported that the inactivation (cKO) or the stabilization (cST) of ß-catenin in cells expressing the astrocyte-specific glutamate aspartate transporter (GLAST) is associated with the vulnerability or resilience to exhibit anxious/depressive-like behaviors, respectively, and to changes in hippocampal proliferation. Here, we used these cKO and cST ß-catenin mice to study the serotonergic system functionality associated with their behavioral/molecular phenotype. The activity of 5-HT1A receptors was assessed by (+)-8-OH-DPAT-induced hypothermia and [35S]GTPγS binding autoradiography. The animals' response to acute stress and the levels of extracellular serotonin (5-HT) in the medial prefrontal cortex (mPFC) were also assessed. cKO mice presented higher 5-HT1A autoreceptor functionality, lower 5-HT1A heteroreceptor functionality, and a decrease in extracellular 5-HT levels in the mPFC. These neurochemical changes were accompanied with a blunted physiological response to stress-induced hyperthermia. In contrast, cST mice showed a reduced 5-HT1A autoreceptor functionality and higher extracellular 5-HT levels in the mPFC after fluoxetine administration. Moreover, cST mice subjected to chronic corticosterone administration did not show a blunted response to fluoxetine. Our findings suggest the existence of a link between ß-catenin levels and 5-HT1A receptor functionality, which may be relevant to understand the neurobiological bases underlying the vulnerability or resilience to stress-related disorders.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Ansiedad
/
Serotonina
/
Receptor de Serotonina 5-HT1A
/
Beta Catenina
Tipo de estudio:
Risk_factors_studies
Límite:
Animals
Idioma:
En
Revista:
Mol Neurobiol
Asunto de la revista:
BIOLOGIA MOLECULAR
/
NEUROLOGIA
Año:
2020
Tipo del documento:
Article
País de afiliación:
España