Deficient spatial memory induced by blockade of beta-adrenoceptors in the hippocampal CA1 region.
A previous study showed that intra-CAl infusion of the beta-adrenergic antagonist DL-propranolol interfered with consolidation of memory for contextual fear conditioning (J.-Z. Ji, X.-M. Wang, & B.-M. Li, 2003). The present study investigated the effect of similarly administered DL-propranolol on consolidation of spatial memory for the water maze. DL-propranolol infused 5 min, but not 6 hr, posttraining caused a deficit in 48-hr memory for the spatial water maze task, whereas similarly administered D-propranolol, which has an equipotent "local-anesthetic" activity but significantly lower beta-blocking activity, induced no amnesia. However, DL-propranolol administered 5 min posttraining did not impair 48-hr memory for the cued water maze task. Thus, beta-adrenoceptor in area CA1 is involved in regulating consolidation of spatial memory for the water maze.
Ji
J-Z
JZ
Laboratory of Higher Brain Functions, Institute of Neurobiology, Fudan University, Shanghai, The People's Republic of China.
Zhang
X-H
XH
Li
B-M
BM
D000319:Adrenergic beta-Antagonists / Q000008:administration & dosage; D000704:Analysis of Variance; D000818:Animals; D003463:Cues; D006624:Hippocampus / Q000187:drug effects*; D007322:Instillation, Drug; D008297:Male; D018782:Maze Learning / Q000187:drug effects / Q000502:physiology*; D008568:Memory / Q000187:drug effects / Q000502:physiology*; D011433:Propranolol / Q000008:administration & dosage; D051381:Rats; D017207:Rats, Sprague-Dawley; D011943:Receptors, Adrenergic, beta / Q000187:drug effects / Q000502:physiology*; D013028:Space Perception / Q000187:drug effects / Q000502:physiology*; D013037:Spatial Behavior / Q000187:drug effects / Q000502:physiology; D013997:Time Factors
D000319:Adrenergic beta-Antagonists; D011943:Receptors, Adrenergic, beta; D011433:Propranolol