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Bransom L, Bassett AP, Zhou M, Cimino JX, Mailman RB, Yang Y. Dopamine D 1 Receptor Agonists Rescue Age-related Decline in Temporal Order Memory. Neuroscience 2024; 551:177-184. [PMID: 38823551 DOI: 10.1016/j.neuroscience.2024.05.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 05/08/2024] [Accepted: 05/27/2024] [Indexed: 06/03/2024]
Abstract
Dopamine D1 receptor agonists improve spatial working memory, but their effects on temporal order memory, particularly prone to the effects of aging, have not been studied. Two D1 agonists, PF6256142 (PF) and 2-methyldihydrexidine (2MDHX), were examined for their effects in a rodent temporal order recognition task. Our results are consistent with the hypothesis that there is an age-related decline in rodent temporal order memory. The data also show that either agonist rescues the poor memory performance with a large effective size. Interestingly, the optimal effective dose varied among individual rats of different age groups. PF showed greater potency for older rats, whereas 2MDHX showed better overall population effectiveness. Both PF and 2MDHX have high intrinsic activity at rodent D1-mediated cAMP synthesis. Conversely, at D1-mediated β-arrestin recruitment, PF has essentially no intrinsic activity, whereas 2MDHX is a super-agonist. These findings suggest that D1 agonists have potential to treat age-related cognitive decline, and the pattern of functional selectivity may be useful for developing drugs with an improved therapeutic index.
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Affiliation(s)
- Luke Bransom
- Department of Pharmacology, Penn State University College of Medicine, Hershey PA 17033, United States
| | - Ava P Bassett
- Department of Pharmacology, Penn State University College of Medicine, Hershey PA 17033, United States
| | - Mi Zhou
- Department of Pharmacology, Penn State University College of Medicine, Hershey PA 17033, United States; Department of Neurology, Penn State University College of Medicine, Hershey, PA 17033, United States
| | - Jack X Cimino
- Department of Pharmacology, Penn State University College of Medicine, Hershey PA 17033, United States
| | - Richard B Mailman
- Department of Pharmacology, Penn State University College of Medicine, Hershey PA 17033, United States; Department of Neurology, Penn State University College of Medicine, Hershey, PA 17033, United States
| | - Yang Yang
- Department of Pharmacology, Penn State University College of Medicine, Hershey PA 17033, United States.
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Cadoret A, Dion-Albert L, Amrani S, Caron L, Théberge M, Turmel A, Lebel M, Menard C. Environmental conditions of recognition memory testing induce neurovascular changes in the hippocampus in a sex-specific manner in mice. Behav Brain Res 2023; 448:114443. [PMID: 37088405 DOI: 10.1016/j.bbr.2023.114443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 04/03/2023] [Accepted: 04/20/2023] [Indexed: 04/25/2023]
Abstract
Experiences are linked to emotions impacting memory consolidation and associated brain neuronal circuits. Posttraumatic stress disorder is an example of strong negative emotions affecting memory processes by flashbacks of past traumas. Stress-related memory deficits are also observed in major depressive disorder (MDD). We recently highlighted that sex-specific blood-brain barrier (BBB) alterations underlie stress responses in mice and human depression. However, little is known about the relationship between emotional valence, memory encoding and BBB gene expression. Here, we investigated the effects of novel object recognition (NOR) test, an experience considered of neutral emotional valence, on BBB properties in dorsal vs ventral hippocampus (HIPP) in the context of various environmental conditions (arena size, handling, age). The HIPP is a brain area central for learning and memory processes with the dorsal and ventral subregions being associated with working memory vs reference memory retrieval, respectively. Expression of genes related to BBB integrity are altered in line with learning and memory processes in a region- and sex-specific manner. We observed correlations between poor learning, anxiety, stress-induced corticosterone release and changes in BBB-associated gene expression. Comparison of BBB transcriptomes between sexes also revealed profound differences at baseline in both ventral and dorsal HIPP. Finally, we identified circulating vascular biomarkers, such as sE-selectin and matrix metallopeptidase 9 (MMP-9), altered following NOR exposure supporting that recognition memory formation has an impact on the neurovasculature. Although deemed as a neutral valence test, NOR experimental conditions can shift it toward a negative valence, impacting performance and highlighting the need to minimize anxiety when performing this commonly used test in mice.
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Affiliation(s)
- Alice Cadoret
- Department of Psychiatry and Neuroscience, Faculty of Medicine and CERVO Brain Research Center, Université Laval, Quebec City, Canada, G1E 1T2
| | - Laurence Dion-Albert
- Department of Psychiatry and Neuroscience, Faculty of Medicine and CERVO Brain Research Center, Université Laval, Quebec City, Canada, G1E 1T2
| | - Sara Amrani
- Department of Psychiatry and Neuroscience, Faculty of Medicine and CERVO Brain Research Center, Université Laval, Quebec City, Canada, G1E 1T2
| | - Laurianne Caron
- Department of Psychiatry and Neuroscience, Faculty of Medicine and CERVO Brain Research Center, Université Laval, Quebec City, Canada, G1E 1T2
| | - Mathilde Théberge
- Department of Psychiatry and Neuroscience, Faculty of Medicine and CERVO Brain Research Center, Université Laval, Quebec City, Canada, G1E 1T2
| | - Audrey Turmel
- Department of Psychiatry and Neuroscience, Faculty of Medicine and CERVO Brain Research Center, Université Laval, Quebec City, Canada, G1E 1T2
| | - Manon Lebel
- Department of Psychiatry and Neuroscience, Faculty of Medicine and CERVO Brain Research Center, Université Laval, Quebec City, Canada, G1E 1T2
| | - Caroline Menard
- Department of Psychiatry and Neuroscience, Faculty of Medicine and CERVO Brain Research Center, Université Laval, Quebec City, Canada, G1E 1T2.
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Stevanovic KD, Fry SA, DeFilipp JMS, Wu N, Bernstein BJ, Cushman JD. Assessing the importance of sex in a hippocampus-dependent behavioral test battery in C57BL/6NTac mice. LEARNING & MEMORY (COLD SPRING HARBOR, N.Y.) 2022; 29:203-215. [PMID: 35882502 PMCID: PMC9374270 DOI: 10.1101/lm.053599.122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 06/21/2022] [Indexed: 11/24/2022]
Abstract
Inclusion of male and female subjects in behavioral neuroscience research requires a concerted effort to characterize sex differences in standardized behavioral assays. Sex differences in hippocampus-dependent assays have been widely reported but are still poorly characterized. In the present study, we conducted a parametric analysis of spontaneous alternation, object recognition, and fear conditioning in a commonly used control strain, C57BL/6NTac. Our findings show largely similar performance between males and females across the majority of behavioral end points. However, we identified an important difference in nonassociative fear sensitization, whereby females showed an enhanced fear response to the 75-dB tone that is used as the conditional stimulus. In addition, we observed an impairment in object location performance in females that was ameliorated by more extensive habituation to handling. Together, these findings argue that sex differences in nonassociative fear responses to both novel auditory cues and novel objects need to be considered when designing and interpreting cognitive assays in C57BL/6 mice. Furthermore, this elevated fear sensitization could serve as a novel approach to model the increased incidence of anxiety disorders in women.
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Affiliation(s)
- Korey D Stevanovic
- Neurobehavioral Core Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Durham, North Carolina 27709, USA
| | - Sydney A Fry
- Neurobehavioral Core Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Durham, North Carolina 27709, USA
| | - Jemma M S DeFilipp
- Neurobehavioral Core Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Durham, North Carolina 27709, USA
| | - Nicholas Wu
- University of California at Los Angeles, Los Angeles, California 90095, USA
| | - Briana J Bernstein
- Neurobehavioral Core Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Durham, North Carolina 27709, USA
| | - Jesse D Cushman
- Neurobehavioral Core Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Durham, North Carolina 27709, USA
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