Abstract:
:It has been suggested that arginine vasopressin (AVP) is involved in the retention of learned responses, in addition to its classical physiological functions of water retention and modulation of blood pressure. AVP administered subcutaneously (s.c.), intraventricularly or intracerebrally can prolong extinction of active avoidance behaviour and can enhance retention in inhibitory (passive) avoidance. These effects have been interpreted as a direct action of AVP on the central nervous system to facilitate memory consolidation. AVP also has facilitatory effects on cognitive function in humans, and marked deficits in AVP function have been associated with certain types of psychopathology. Alternative hypotheses for the behavioural actions of AVP have involved motivational constructs such as arousal, and our recent work has focused on the role of arousal resulting from the activation of peripheral visceral signals in the behavioural effects of peripherally administered AVP. The development of a specific antagonist for AVP, 1-deaminopenicillamine-2-O-methyl tyrosine arginine vasopressin (dPTyr(Me)AVP), which can reverse the behavioural effects of exogenously administered AVP, has provided a powerful tool for examining the role of AVP in the behavioural responses produced by physiological challenges known to release vasopressin. However, the relationship between the behavioural effects of exogenously administered AVP and the behavioural function of endogenously released AVP has not been evaluated. We report here that a potent peripheral osmotic stimulus, the intraperitoneal (i.p.) injection of hypertonic saline, at doses known to release AVP both centrally and peripherally, will produce behavioural effects similar to those of exogenously administered AVP. Furthermore, the prolongation of active avoidance induced by this osmotic stimulus is reversed by pretreatment with dPTyr(Me)AVP, suggesting that endogenously released AVP may also produce behavioural effects.
journal_name
Naturejournal_title
Natureauthors
Koob GF,Dantzer R,Rodriguez F,Bloom FE,Le Moal Mdoi
10.1038/315750a0subject
Has Abstractpub_date
1985-06-27 00:00:00pages
750-2issue
6022eissn
0028-0836issn
1476-4687journal_volume
315pub_type
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