Psychotropic effects of angiotensin II N-terminal fragments in rats

• Authors: Zdzislaw Holy , Jan Braszko , Konstanty Wisniewski
• Languages of publication: EN

Abstracts

EN

In this study the effects of angiotensin (AII) angiotensin II hexapeptide [AII(1-6)] and angiotensin II pentapeptide [AII(2-6)] on the motility, stereotypy, learning of conditioned avoidance responses (CARs) and recall of a passive behavior making it possible to avoid averisve stimulation in rats, were compared. All the peptides were injected into the lateral cerebral ventrice (icv) in a dose of 1nmol. AII caused a statistically significant increase in the number of crossings, rearings, and bar approaches in an open field whereas [AII(1-6)] and [AII(2-6)] were inactive in this test. The stereotypic behavior induced by an intraperitoneal (ip) injection of apomorphine (1mg/kg) and amphetamine (7,5 mg/kg) was statistically significantly enhanced only in the rats wihich received AII icv. The application of AII, but not that of [AII(1-6)] and [AII(2-6)] resulted in a quicker acquisition of the CARs. A better recall of passive avoidance was achieved only by AII, while the fragments [AII(1-6)] and [AII(2-6)] had no effect. These findings indicate that the 1-6 and 2-6 fragments of AII do not possess a psychotropic activity like that of the parent ictapeptide.

Keywords

EN

ANGIOTENSIN II; BEHAVIOURAL EFFECT; LEARNING; MEMORY; RAT

Discipline

• PHARMACOLOGY: PHARMACOLOGY

• Publisher: Institute of Pharmacology, Polish Academy of Sciences
• Journal: Polish Journal of Pharmacology
• Year: 1993
• Volume: 45
• Issue: 1
• Pages: 31-41

Contributors

author

Zdzislaw Holy

author

Jan Braszko

author

Konstanty Wisniewski

• Document Type: article