Long-term continuous, but not daily, environmental enrichment reduces spatial memory decline in aged male mice

2006 ◽  
Vol 85 (2) ◽  
pp. 139-152 ◽  
Author(s):  
J BENNETT ◽  
P MCRAE ◽  
L LEVY ◽  
K FRICK
Keyword(s):  
Spatial Memory ◽  
Environmental Enrichment ◽  
Male Mice ◽  
Memory Decline

Long-term environmental impact on object recognition, spatial memory, and reversal learning capabilities in Cacna1c haploinsufficient rats

2019 ◽  
Author(s):  
Moria D Braun ◽  
Theresa M Kisko ◽  
Stephanie H Witt ◽  
Marcella Rietschel ◽  
Rainer K W Schwarting ◽  
...  
Keyword(s):  
Object Recognition ◽  
Spatial Memory ◽  
Social Isolation ◽  
Reversal Learning ◽  
Environmental Enrichment ◽  
Association Studies ◽  
Environment Interaction ◽  
Genome Wide Association Studies ◽  
Learning Capabilities

Abstract Genetic and environmental influences are thought to interact in their contribution to the etiology of major neuropsychiatric disorders. One of the best replicated findings obtained in genome-wide association studies are genetic variants in the CACNA1C gene. Here, we used our constitutive heterozygous Cacna1c rat model in combination with a four-week exposure to either post-weaning social isolation, standard housing, or social and physical environmental enrichment during the critical juvenile developmental period to observe their long-term interactive effects with Cacna1c haploinsufficiency. Our study provides evidence for a gene x environment interaction, i.e. an interplay between Cacna1c haploinsufficiency and environment during juvenile development, on object recognition, spatial memory, and reversal learning capabilities. Social and physical enrichment had a positive influence on Cacna1c+/− rats and Cacna1c+/+ littermate controls on spatial and reversal learning, while post-weaning social isolation negatively affected novel object recognition in both genotypes. Despite intact spatial learning and re-learning abilities in all groups, slight but consistent deficits were evident in Cacna1c+/− rats previously housed under standard conditions particularly during reversal learning but not Cacna1c+/− rats previously exposed to social and physical enrichment. Together, this supports the notion that Cacna1c interacts with the environment to shape disease vulnerability and associated alterations in cognitive functioning.

scholarly journals The histone H3 lysine 9 methyltransferase G9a/GLP complex activity is required for long-term consolidation of spatial memory in mice

2021 ◽  
Vol 179 ◽  
pp. 107406
Author(s):  
Kyrian Nicolay-Kritter ◽  
Jordan Lassalle ◽  
Jean-Louis Guillou ◽  
Nicole Mons
Keyword(s):  
Spatial Memory ◽  
Histone H3 ◽  
Complex Activity

Role of EP2 and EP3 PGE2receptors in control of murine renal hemodynamics

2001 ◽  
Vol 280 (1) ◽  
pp. H327-H333 ◽  
Author(s):  
Laurent P. Audoly ◽  
Xiaoping Ruan ◽  
Victoria A. Wagner ◽  
Jennifer L. Goulet ◽  
Stephen L. Tilley ◽  
...  
Keyword(s):  
Renal Artery ◽  
Vascular Reactivity ◽  
Renal Hemodynamics ◽  
Receptor Subtypes ◽  
Male Mice ◽  
Unique Role ◽  
Arterial Blood ◽  
Renal Vascular

The kidney plays a central role in long-term regulation of arterial blood pressure and salt and water homeostasis. This is achieved in part by the local actions of paracrine and autacoid mediators such as the arachidonic acid-prostanoid system. The present study tested the role of specific PGE2 E-prostanoid (EP) receptors in the regulation of renal hemodynamics and vascular reactivity to PGE2. Specifically, we determined the extent to which the EP2 and EP3 receptor subtypes mediate the actions of PGE2 on renal vascular tone. Renal blood flow (RBF) was measured by ultrasonic flowmetry, whereas vasoactive agents were injected directly into the renal artery of male mice. Studies were performed on two independent mouse lines lacking either EP2or EP3 (−/−) receptors and the results were compared with wild-type controls (+/+). Our results do not support a unique role of the EP2 receptor in regulating overall renal hemodynamics. Baseline renal hemodynamics in EP2−/− mice [RBF EP2−/−: 5.3 ± 0.8 ml · min−1 · 100 g kidney wt−1; renal vascular resistance (RVR) 19.7 ± 3.6 mmHg · ml−1 · min · g kidney wt] did not differ statistically from control mice (RBF +/+: 4.0 ± 0.5 ml · min−1 · 100 g kidney wt−1; RVR +/+: 25.4 ± 4.9 mmHg · ml−1 · min · 100 g kidney wt−1). This was also the case for the peak RBF increase after local PGE2 (500 ng) injection into the renal artery (EP2−/−: 116 ± 4 vs. +/+: 112 ± 2% baseline RBF). In contrast, we found that the absence of EP3receptors in EP3−/− mice caused a significant increase (43%) in basal RBF (7.9 ± 0.8 ml · min−1 · g kidney wt−1, P < 0.05 vs. +/+) and a significant decrease (41%) in resting RVR (11.6 ± 1.4 mmHg · ml−1 · min · g kidney wt−1, P < 0.05 vs. +/+). Local administration of 500 ng of PGE2 into the renal artery caused more pronounced renal vasodilation in EP3−/− mice (128 ± 2% of basal RBF, P < 0.05 vs. +/+). We conclude that EP3 receptors mediate vasoconstriction in the kidney of male mice and its actions are tonically active in the basal state. Furthermore, EP3receptors are capable of buffering PGE2-mediated renal vasodilation.

scholarly journals Subchronic Oral Bromocriptine Methanesulfonate Enhances Open Field Novelty-Induced Behavior and Spatial Memory in Male Swiss Albino Mice

2013 ◽  
Vol 2013 ◽  
pp. 1-5
Author(s):  
Olakunle James Onaolapo ◽  
Adejoke Yetunde Onaolapo
Keyword(s):  
Spatial Memory ◽  
Open Field ◽  
Cumulative Effect ◽  
Male Mice ◽  
Healthy Male ◽  
Swiss Albino Mice ◽  
Y Maze ◽  
Field Assessment ◽  
Albino Mice ◽  
Neurobehavioral Effects

This study set out to assess the neurobehavioral effects of subchronic, oral bromocriptine methanesulfonate using the open field and the Y-maze in healthy male mice. Sixty adult Swiss albino mice were assigned into three groups. Controls received normal saline, while test groups received bromocriptine methanesulfonate at 2.5 and 5 mg/kg/day, respectively, for a period of 21 days. Neurobehavioral tests were carried out on days 1 and 21 after administration. Open field assessment on day 1 after administration revealed significant increase in grooming at 2.5 and 5 mg/kg, while horizontal and vertical locomotion showed no significant changes. Day 1 also showed no significant changes in Y-maze alternation. On day 21, horizontal locomotion, rearing, and grooming were increased significantly at 2.5 and 5 mg/kg doses after administration; also, spatial memory was significantly enhanced at 2.5 mg/kg. In conclusion, the study demonstrates the ability of oral bromocriptine to affect neurobehavior in normal mice. It also suggests that there is a cumulative effect of oral bromocriptine on the behaviors studied with more changes being seen after subchronic administration rather than after a single oral dose.

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