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  • Title: Basal and stress-induced corticosterone secretion is decreased by lesion of mesencephalic dopaminergic neurons.
    Author: Casolini P, Kabbaj M, Leprat F, Piazza PV, Rougé-Pont F, Angelucci L, Simon H, Le Moal M, Maccari S.
    Journal: Brain Res; 1993 Sep 17; 622(1-2):311-4. PubMed ID: 8242373.
    Abstract:
    There is evidence that certain psychopathological conditions are accompanied by a dysfunction in both the hypothalamo-pituitary-adrenal axis and dopaminergic systems, although the relationship between these two systems is as yet unclear. In the present study we investigated the effect of a specific lesion of dopamine mesencephalic neurons (Ventral Tegmental Area) on basal and stress-induced corticosterone secretion. Three weeks after injection of 6-OHDA, there was a depletion in dopamine in the frontal cortex and in the ventral and dorsal striatum, whereas norepinephrine and serotonin levels were unchanged. The dopamine-lesioned rats exhibited a lower basal and stress-induced corticosterone secretion than the sham-lesioned animals. The results indicate that the dopaminergic system may have a stimulatory influence on the hypothalamo-pituitary-adrenal axis.
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