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  • Title: Effects of intraventricular beta-endorphin on GABA system in some areas of chick brain.
    Author: Nisticò G, Di Giorgio RM, Rotiroti D, Naccari F, Calatroni A.
    Journal: Res Commun Chem Pathol Pharmacol; 1979 Dec; 26(3):469-78. PubMed ID: 523783.
    Abstract:
    In chicks with cannulae chronically implanted into the III cerebral ventricle, the effects of a single dose (10 micrograms) of beta-endorphin on GABA and free glutamic acid content, GAD and GABA-T activities in the diencephalon, brain-stem and brain hemispheres were studied at the time of maximal behavioural stuporous state and analgesia. A significant decrease in GABA concentration both in the diencephalon and brain-stem, accompanied by a significant increase in GABA-T activity in the same areas, was shown to occur. No changes were observed in GAD activity and in glutamic acid content in the studied areas of the brain. In conclusion, present experiments suggest that some central effects of a beta-endorphin may be due to an interference with GABA-ergic transmission.
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