NK(3) receptor agonism promotes episodic-like memory in mice.
The mammalian tachykinins are a family of closely related peptides including substance P, neurokinin A, neurokinin B and, recently, also hemokinin-1. They are present in the peripheral and central nervous systems, and bind to three known neurokinin (NK) receptors, the NK(1)-, NK(2)- and NK(3) receptors. In both rodents and humans, NK(3) receptors are expressed in brain structures which have been associated with learning and memory. Evidence for a role of NK(3) receptors in learning and memory has been found in NK(3) receptor knockout mice. Here, we investigated the influence of the NK(3) receptor agonist, senktide (0.1, 0.2 and 0.4 mg/kg), on the performance of C57BL/6 mice in a recently developed episodic-like memory task. Since a promnestic effect of senktide was expected, we employed an experimental protocol that provided sub-optimal learning conditions for episodic-like memory. The results indicate that senktide promotes episodic-like memory in mice in a dose-dependent manner, providing, for the first time, evidence for an involvement of NK(3) receptors in episodic-like memory.
Institute of Physiological Psychology, Center for Biological and Medical Research, Heinrich-Heine-University of Düsseldorf, D-40225 Düsseldorf, Germany.
Armin
A
Zlomuzica
Ekrem
E
Dere
Joseph P
JP
Huston
Maria A
MA
de Souza Silva
D000818:Animals; D001921:Brain / Q000187:drug effects; D003463:Cues; D004305:Dose-Response Relationship, Drug; D005106:Exploratory Behavior / Q000187:drug effects; D008297:Male; D018782:Maze Learning / Q000187:drug effects*; D011939:Mental Recall / Q000187:drug effects*; D051379:Mice; D008810:Mice, Inbred C57BL; D009949:Orientation / Q000187:drug effects*; D010364:Pattern Recognition, Visual / Q000187:drug effects*; D010446:Peptide Fragments / Q000494:pharmacology*; D018042:Receptors, Neurokinin-3 / Q000819:agonists*; D012153:Retention, Psychology / Q000187:drug effects; D012931:Social Environment; D013373:Substance P / Q000031:analogs & derivatives* / Q000494:pharmacology
D010446:Peptide Fragments; D018042:Receptors, Neurokinin-3; C054724:senktide; D013373:Substance P