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  • Title: Treatment with L-dopa in early life restored pituitary-adrenocortical response to emotional stress in adult rats with inherited arterial hypertension.
    Author: Maslova LN, Markel AL, Naumenko EV.
    Journal: Brain Res; 1991 Apr 12; 546(1):55-60. PubMed ID: 1855149.
    Abstract:
    This study investigates the function of the hypothalamic-pituitary-adrenocortical system (HPAS) in adult rats with inherited stress-induced arterial hypertension (ISIAH rats) whose arterial blood pressure was lowered by the dopamine precursor L-DOPA treatment during early development (on days 21-25 of life). The response of the HPAS induced by emotional stress was significantly lower in intact ISIAH rats than in normotensive Wistar animals. Injections of L-DOPA on days 21-23 or 21-25 of postnatal life were followed by a long-lasting complete restoration of the emotional stress response in adult ISIAH rats. The restoring effect of L-DOPA was produced through enhancement of synthesis of the brain noradrenaline and, perhaps, adrenaline. The effect was associated with a normalization of the response of the brain adrenergic system to noradrenaline and did not relate to an increase of the plasma corticosterone level after L-DOPA administration in early ontogeny.
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