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Hwang DS, Kim N, Choi JG, Kim HG, Kim H, Oh MS. Dangguijakyak-san ameliorates memory deficits in ovariectomized mice by upregulating hippocampal estrogen synthesis. Altern Ther Health Med 2017; 17:501. [PMID: 29178947 PMCID: PMC5702078 DOI: 10.1186/s12906-017-2015-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 11/17/2017] [Indexed: 01/20/2023]
Abstract
Background Dangguijakyak-san (DJS) is an herbal formulation that has been clinically applicable for treating postmenopausal symptoms and neurological disorders. It is reported that hippocampal estrogen attenuates memory impairment via neuroprotection and synaptogenesis. However, the effect of DJS on hippocampal estrogen synthesis remains unknown. In this study, we explored the effect of DJS and its neuroprotective mechanism against memory impairment in ovariectomized (OVX) mice, with respect to hippocampal estrogen stimulation. Methods Cell cultures were prepared from the hippocampi of 18-day-old embryos from timed pregnant Sprague–Dawley rats. The hippocampi were dissected, collected, dissociated, and plated in 60-mm dishes. The cells were treated with DJS for 48 h and the supernatant was collected to determine estrogen levels. Female ICR mice (8-weeks-old) were housed for 1 week and ovariectomy was performed to remove the influence of ovary-synthesized estrogens. Following a 2-week post-surgical recovery period, the mice were administrated with DJS (50 and 100 mg/kg/day, p.o.) or 17β-estradiol (200 μg/kg/day, i.p.) once daily for 21 days. Hippocampal and serum estrogen levels were determined using enzyme-linked immunosorbent assay kit. Memory behavioral tests, western blot, and immunohistochemical analyses were performed to evaluate the neuroprotective effects of DJS in this model. Results DJS treatment promoted estrogen synthesis in primary hippocampal cells and the hippocampus of OVX mice, resulting in the amelioration of OVX-induced memory impairment. Hippocampal estrogen stimulated by DJS treatment contributed to the activation of cAMP response element-binding protein and synaptic protein in OVX mice. Conclusion DJS may attenuate memory deficits in postmenopausal women via hippocampal estrogen synthesis. Electronic supplementary material The online version of this article (10.1186/s12906-017-2015-6) contains supplementary material, which is available to authorized users.
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Locus Coeruleus and Dopamine-Dependent Memory Consolidation. Neural Plast 2017; 2017:8602690. [PMID: 29123927 PMCID: PMC5662828 DOI: 10.1155/2017/8602690] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Revised: 06/06/2017] [Accepted: 06/18/2017] [Indexed: 12/12/2022] Open
Abstract
Most everyday memories including many episodic-like memories that we may form automatically in the hippocampus (HPC) are forgotten, while some of them are retained for a long time by a memory stabilization process, called initial memory consolidation. Specifically, the retention of everyday memory is enhanced, in humans and animals, when something novel happens shortly before or after the time of encoding. Converging evidence has indicated that dopamine (DA) signaling via D1/D5 receptors in HPC is required for persistence of synaptic plasticity and memory, thereby playing an important role in the novelty-associated memory enhancement. In this review paper, we aim to provide an overview of the key findings related to D1/D5 receptor-dependent persistence of synaptic plasticity and memory in HPC, especially focusing on the emerging evidence for a role of the locus coeruleus (LC) in DA-dependent memory consolidation. We then refer to candidate brain areas and circuits that might be responsible for detection and transmission of the environmental novelty signal and molecular and anatomical evidence for the LC-DA system. We also discuss molecular mechanisms that might mediate the environmental novelty-associated memory enhancement, including plasticity-related proteins that are involved in initial memory consolidation processes in HPC.
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Passani MB, Benetti F, Blandina P, Furini CRG, de Carvalho Myskiw J, Izquierdo I. Histamine regulates memory consolidation. Neurobiol Learn Mem 2017; 145:1-6. [PMID: 28838882 DOI: 10.1016/j.nlm.2017.08.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 08/14/2017] [Accepted: 08/20/2017] [Indexed: 12/13/2022]
Abstract
Recent findings have reasserted the role of histamine in the regulation of memory consolidation first proposed in 1986 in an inhibitory avoidance task in rats. They indicate that histamine is indeed a major regulator of memory consolidation in various tasks, through H2 receptors in the dorsal hippocampus and through H3 receptors in the basolateral amygdala, depending on the task. In the object recognition task, the memory enhancing effect is mediated by the three receptors (H1, H2, H3) in the dorsal hippocampus. In social recognition, the consolidation effect is mediated by H2 receptors in both amygdala and dorsal hippocampus. Data have suggested, in addition, influences on retrieval; this has been best studied in the dorsal hippocampus in step-down inhibitory avoidance task. Depending on the recent history of the conditioned stimulus (i.e., whether it has been recently reinforced or not), histamine acts on hippocampal H1 receptors, facilitating retrieval, or on H2 receptors, inhibiting it.
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Affiliation(s)
- Maria Beatrice Passani
- Dipartimento di Scienze della Salute, Università di Firenze, Viale G. Pieraccini 6, 50139 Firenze, Italy
| | - Fernando Benetti
- Department of Physiology, Federal University of Rio Grande do Sul, (UFRGS), Rua Sarmento Leite, 500, Porto Alegre 90050-170, Brazil
| | - Patrizio Blandina
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmacologia e Tossicologia, Università di Firenze, Viale G. Pieraccini 6, 50139 Firenze, Italy
| | - Cristiane R G Furini
- Memory Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Av. Ipiranga, 6690 - 2nd Floor, 90610-000 Porto Alegre, RS, Brazil; National Institute of Translational Neuroscience (INNT), National Research Council of Brazil, Brazil
| | - Jociane de Carvalho Myskiw
- Memory Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Av. Ipiranga, 6690 - 2nd Floor, 90610-000 Porto Alegre, RS, Brazil; National Institute of Translational Neuroscience (INNT), National Research Council of Brazil, Brazil.
| | - Ivan Izquierdo
- Memory Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Av. Ipiranga, 6690 - 2nd Floor, 90610-000 Porto Alegre, RS, Brazil; National Institute of Translational Neuroscience (INNT), National Research Council of Brazil, Brazil.
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Grogan JP, Tsivos D, Smith L, Knight BE, Bogacz R, Whone A, Coulthard EJ. Effects of dopamine on reinforcement learning and consolidation in Parkinson's disease. eLife 2017; 6. [PMID: 28691905 PMCID: PMC5531832 DOI: 10.7554/elife.26801] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 07/07/2017] [Indexed: 01/24/2023] Open
Abstract
Emerging evidence suggests that dopamine may modulate learning and memory with important implications for understanding the neurobiology of memory and future therapeutic targeting. An influential hypothesis posits that dopamine biases reinforcement learning. More recent data also suggest an influence during both consolidation and retrieval. Eighteen Parkinson's disease patients learned through feedback ON or OFF medication, with memory tested 24 hr later ON or OFF medication (4 conditions, within-subjects design with matched healthy control group). Patients OFF medication during learning decreased in memory accuracy over the following 24 hr. In contrast to previous studies, however, dopaminergic medication during learning and testing did not affect expression of positive or negative reinforcement. Two further experiments were run without the 24 hr delay, but they too failed to reproduce effects of dopaminergic medication on reinforcement learning. While supportive of a dopaminergic role in consolidation, this study failed to replicate previous findings on reinforcement learning.
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Affiliation(s)
- John P Grogan
- Institute of Clinical Neurosciences, School of Clinical Sciences, University of Bristol, Bristol, United Kingdom
| | - Demitra Tsivos
- Clinical Neurosciences, North Bristol NHS Trust, Bristol, United Kingdom
| | - Laura Smith
- Institute of Clinical Neurosciences, School of Clinical Sciences, University of Bristol, Bristol, United Kingdom
| | - Brogan E Knight
- Clinical Neurosciences, North Bristol NHS Trust, Bristol, United Kingdom
| | - Rafal Bogacz
- MRC Brain Network Dynamics Unit, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom
| | - Alan Whone
- Institute of Clinical Neurosciences, School of Clinical Sciences, University of Bristol, Bristol, United Kingdom
| | - Elizabeth J Coulthard
- Institute of Clinical Neurosciences, School of Clinical Sciences, University of Bristol, Bristol, United Kingdom.,Clinical Neurosciences, North Bristol NHS Trust, Bristol, United Kingdom
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Pierard C, Dorey R, Henkous N, Mons N, Béracochéa D. Different implications of the dorsal and ventral hippocampus on contextual memory retrieval after stress. Hippocampus 2017; 27:999-1015. [PMID: 28597498 DOI: 10.1002/hipo.22748] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 05/24/2017] [Accepted: 05/26/2017] [Indexed: 12/26/2022]
Abstract
This study assessed the relative contributions of dorsal (dHPC) and ventral (vHPC) hippocampus regions in mediating the rapid effects of an acute stress on contextual memory retrieval. Indeed, we previously showed that an acute stress (3 electric footschocks; 0.9 mA each) delivered 15 min before the 24 h-test inversed the memory retrieval pattern in a contextual discrimination task. Specifically, mice learned in a four-hole board two successive discriminations (D1 and D2) varying by the color and texture of the floor. Twenty-four hours later, nonstressed animals remembered accurately D1 but not D2 whereas stressed mice showed an opposite memory retrieval pattern, D2 being more accurately remembered than D1. We showed here that, at the time of memory testing in that task, stressed animals exhibited no significant changes neither in pCREB activity nor in the time-course evolution of corticosterone into the vHPC; in contrast, a significant decrease in pCREB activity and a significant increase in corticosterone were observed in the dHPC as compared to nonstressed mice. Moreover, local infusion of the anesthetic lidocaine into the vHPC 15 min before the onset of the stressor did not modify the memory retrieval pattern in nonstress and stress conditions whereas lidocaine infusion into the dHPC induced in nonstressed mice an memory retrieval pattern similar to that observed in stressed animals. The overall set of data shows that memory retrieval in nonstress condition involved primarily the dHPC and that the inversion of memory retrieval pattern after stress is linked to a dHPC but not vHPC dysfunction.
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Affiliation(s)
- C Pierard
- IRBA, 91223 Brétigny sur Orge-Cedex, France
| | - R Dorey
- IRBA, 91223 Brétigny sur Orge-Cedex, France
| | - N Henkous
- Université de Bordeaux, CNRS UMR 5287, Pessac, 33615, France
| | - N Mons
- Université de Bordeaux, CNRS UMR 5287, Pessac, 33615, France
| | - D Béracochéa
- Université de Bordeaux, CNRS UMR 5287, Pessac, 33615, France
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56
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Kumar A, Singh N. Inhibitor of Phosphodiestearse-4 improves memory deficits, oxidative stress, neuroinflammation and neuropathological alterations in mouse models of dementia of Alzheimer’s Type. Biomed Pharmacother 2017; 88:698-707. [DOI: 10.1016/j.biopha.2017.01.059] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 12/29/2016] [Accepted: 01/10/2017] [Indexed: 01/12/2023] Open
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Budzynska B, Michalak A, Frankowska M, Kaszubska K, Biała G. Acute behavioral effects of co-administration of mephedrone and MDMA in mice. Pharmacol Rep 2017; 69:199-205. [DOI: 10.1016/j.pharep.2016.10.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 10/07/2016] [Accepted: 10/07/2016] [Indexed: 12/11/2022]
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58
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Chiang CK, Xu B, Mehta N, Mayne J, Sun WYL, Cheng K, Ning Z, Dong J, Zou H, Cheng HYM, Figeys D. Phosphoproteome Profiling Reveals Circadian Clock Regulation of Posttranslational Modifications in the Murine Hippocampus. Front Neurol 2017; 8:110. [PMID: 28382018 PMCID: PMC5360755 DOI: 10.3389/fneur.2017.00110] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 03/08/2017] [Indexed: 12/20/2022] Open
Abstract
The circadian clock is an endogenous oscillator that drives daily rhythms in physiology, behavior, and gene expression. The underlying mechanisms of circadian timekeeping are cell-autonomous and involve oscillatory expression of core clock genes that is driven by interconnecting transcription–translation feedback loops (TTFLs). Circadian clock TTFLs are further regulated by posttranslational modifications, in particular, phosphorylation. The hippocampus plays an important role in spatial memory and the conversion of short- to long-term memory. Several studies have reported the presence of a peripheral oscillator in the hippocampus and have highlighted the importance of circadian regulation in memory formation. Given the general importance of phosphorylation in circadian clock regulation, we performed global quantitative proteome and phosphoproteome analyses of the murine hippocampus across the circadian cycle, applying spiked-in labeled reference and high accuracy mass spectrometry (MS). Of the 3,052 proteins and 2,868 phosphosites on 1,368 proteins that were accurately quantified, 1.7% of proteins and 5.2% of phosphorylation events exhibited time-of-day-dependent expression profiles. The majority of circadian phosphopeptides displayed abrupt fluctuations at mid-to-late day without underlying rhythms of protein abundance. Bioinformatic analysis of cyclic phosphorylation events revealed their diverse distribution in different biological pathways, most notably, cytoskeletal organization and neuronal morphogenesis. This study provides the first large-scale, quantitative MS analysis of the circadian phosphoproteome and proteome of the murine hippocampus and highlights the significance of rhythmic regulation at the posttranslational level in this peripheral oscillator. In addition to providing molecular insights into the hippocampal circadian clock, our results will assist in the understanding of genetic factors that underlie rhythms-associated pathological states of the hippocampus.
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Affiliation(s)
- Cheng-Kang Chiang
- Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, Ottawa Institute of Systems Biology, University of Ottawa, Ottawa, ON, Canada; Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien, Taiwan
| | - Bo Xu
- Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, Ottawa Institute of Systems Biology, University of Ottawa , Ottawa, ON , Canada
| | - Neel Mehta
- Department of Biology, University of Toronto Mississauga , Mississauga, ON , Canada
| | - Janice Mayne
- Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, Ottawa Institute of Systems Biology, University of Ottawa , Ottawa, ON , Canada
| | - Warren Y L Sun
- Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, Ottawa Institute of Systems Biology, University of Ottawa , Ottawa, ON , Canada
| | - Kai Cheng
- Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, Ottawa Institute of Systems Biology, University of Ottawa , Ottawa, ON , Canada
| | - Zhibin Ning
- Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, Ottawa Institute of Systems Biology, University of Ottawa , Ottawa, ON , Canada
| | - Jing Dong
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian , China
| | - Hanfa Zou
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian , China
| | - Hai-Ying Mary Cheng
- Department of Biology, University of Toronto Mississauga , Mississauga, ON , Canada
| | - Daniel Figeys
- Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, Ottawa Institute of Systems Biology, University of Ottawa, Ottawa, ON, Canada; Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada; Canadian Institute for Advanced Research, Toronto, ON, Canada
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BAF53b, a Neuron-Specific Nucleosome Remodeling Factor, Is Induced after Learning and Facilitates Long-Term Memory Consolidation. J Neurosci 2017; 37:3686-3697. [PMID: 28270570 DOI: 10.1523/jneurosci.3220-16.2017] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 01/31/2017] [Accepted: 03/01/2017] [Indexed: 11/21/2022] Open
Abstract
Although epigenetic mechanisms of gene expression regulation have recently been implicated in memory consolidation and persistence, the role of nucleosome-remodeling is largely unexplored. Recent studies show that the functional loss of BAF53b, a postmitotic neuron-specific subunit of the BAF nucleosome-remodeling complex, results in the deficit of consolidation of hippocampus-dependent memory and cocaine-associated memory in the rodent brain. However, it is unclear whether BAF53b expression is regulated during memory formation and how BAF53b regulates fear memory in the amygdala, a key brain site for fear memory encoding and storage. To address these questions, we used viral vector approaches to either decrease or increase BAF53b function specifically in the lateral amygdala of adult mice in auditory fear conditioning paradigm. Knockdown of Baf53b before training disrupted long-term memory formation with no effect on short-term memory, basal synaptic transmission, and spine structures. We observed in our qPCR analysis that BAF53b was induced in the lateral amygdala neurons at the late consolidation phase after fear conditioning. Moreover, transient BAF53b overexpression led to persistently enhanced memory formation, which was accompanied by increase in thin-type spine density. Together, our results provide the evidence that BAF53b is induced after learning, and show that such increase of BAF53b level facilitates memory consolidation likely by regulating learning-related spine structural plasticity.SIGNIFICANCE STATEMENT Recent works in the rodent brain begin to link nucleosome remodeling-dependent epigenetic mechanism to memory consolidation. Here we show that BAF53b, an epigenetic factor involved in nucleosome remodeling, is induced in the lateral amygdala neurons at the late phase of consolidation after fear conditioning. Using specific gene knockdown or overexpression approaches, we identify the critical role of BAF53b in the lateral amygdala neurons for memory consolidation during long-term memory formation. Our results thus provide an idea about how nucleosome remodeling can be regulated during long-term memory formation and contributes to the permanent storage of associative fear memory in the lateral amygdala, which is relevant to fear and anxiety-related mental disorders.
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60
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Role of D2 dopamine receptors of the ventral pallidum in inhibitory avoidance learning. Behav Brain Res 2017; 321:99-105. [DOI: 10.1016/j.bbr.2017.01.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 12/13/2016] [Accepted: 01/01/2017] [Indexed: 11/21/2022]
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Andrews SJ, Das D, Anstey KJ, Easteal S. Association of AKAP6 and MIR2113 with cognitive performance in a population-based sample of older adults. GENES BRAIN AND BEHAVIOR 2017; 16:472-478. [PMID: 28067462 DOI: 10.1111/gbb.12368] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 12/21/2016] [Accepted: 01/04/2017] [Indexed: 01/12/2023]
Abstract
Genetic factors make a substantial contribution to inter-individual variability in cognitive function. A recent meta-analysis of genome-wide association studies identified two loci, AKAP6 and MIR2113, that are associated with general cognitive function. Here, we extend this previous research by investigating the association of MIR2113 and AKAP6 with baseline and longitudinal non-linear change across a broad spectrum of cognitive domains in a community-based cohort of older adults without dementia. Two single nucleotide polymorphisms (SNPs), MIR211-rs10457441 and AKAP6-rs17522122 were genotyped in 1570 non-demented older Australians of European ancestry, who were examined up to 4 times over 12 years. Linear mixed effects models were used to examine the association between AKAP6 and MIR2113 with cognitive performance in episodic memory, working memory, vocabulary, perceptual speed and reaction time at baseline and with linear and quadratic rates of change. AKAP6-rs17522122*T was associated with worse baseline performance in episodic memory, working memory, vocabulary and perceptual speed, but it was not associated with cognitive change in any domain. MIR2113-rs10457441*T was associated with accelerated decline in episodic memory. No other associations with baseline cognitive performance or with linear or quadratic rate or cognitive changes were observed for this SNP. These results confirm the previous finding that AKAP6 is associated with performance across multiple cognitive domains at baseline but not with cognitive decline, while MIR2113 primarily affects the rate at which memory declines over time.
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Affiliation(s)
- S J Andrews
- John Curtin School of Medical Research, Australian National University, Canberra, Australia
| | - D Das
- John Curtin School of Medical Research, Australian National University, Canberra, Australia
| | - K J Anstey
- Centre for Research on Ageing, Health and Wellbeing, Australian National University, Canberra, Australia
| | - S Easteal
- John Curtin School of Medical Research, Australian National University, Canberra, Australia
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62
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Yu XW, Curlik DM, Oh MM, Yin JC, Disterhoft JF. CREB overexpression in dorsal CA1 ameliorates long-term memory deficits in aged rats. eLife 2017; 6. [PMID: 28051768 PMCID: PMC5214885 DOI: 10.7554/elife.19358] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 12/15/2016] [Indexed: 11/20/2022] Open
Abstract
The molecular mechanisms underlying age-related cognitive deficits are not yet fully elucidated. In aged animals, a decrease in the intrinsic excitability of CA1 pyramidal neurons is believed to contribute to age-related cognitive impairments. Increasing activity of the transcription factor cAMP response element-binding protein (CREB) in young adult rodents facilitates cognition, and increases intrinsic excitability. However, it has yet to be tested if increasing CREB expression also ameliorates age-related behavioral and biophysical deficits. To test this hypothesis, we virally overexpressed CREB in CA1 of dorsal hippocampus. Rats received CREB or control virus, before undergoing water maze training. CREB overexpression in aged animals ameliorated the long-term memory deficits observed in control animals. Concurrently, cells overexpressing CREB in aged animals had reduced post-burst afterhyperpolarizations, indicative of increased intrinsic excitability. These results identify CREB modulation as a potential therapy to treat age-related cognitive decline. DOI:http://dx.doi.org/10.7554/eLife.19358.001
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Affiliation(s)
- Xiao-Wen Yu
- Department of Physiology, Northwestern University,Feinberg School of Medicine, Chicago, United States
| | - Daniel M Curlik
- Department of Physiology, Northwestern University,Feinberg School of Medicine, Chicago, United States.,Department of Behavioral Sciences, Psychology Program, York College of Pennsylvania, York, United States
| | - M Matthew Oh
- Department of Physiology, Northwestern University,Feinberg School of Medicine, Chicago, United States
| | - Jerry Cp Yin
- Departments of Genetics and Neurology, University of Wisconsin-Madison, Madison, United States
| | - John F Disterhoft
- Department of Physiology, Northwestern University,Feinberg School of Medicine, Chicago, United States
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Kreutzmann JC, Tudor JC, Angelakos CC, Abel T. The Impact of Sleep Deprivation on Molecular Mechanisms of Memory Consolidation in Rodents. COGNITIVE NEUROSCIENCE OF MEMORY CONSOLIDATION 2017. [DOI: 10.1007/978-3-319-45066-7_5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Peixoto CDS, Parfitt GM, Bruch GE, Cordeiro MF, Almeida DV, Marins LFF, Barros DM. Effects of learning on mTOR pathway gene expression in the brain of zebrafish (Danio rerio) of different ages. Exp Gerontol 2016; 89:8-14. [PMID: 28017716 DOI: 10.1016/j.exger.2016.12.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 12/18/2016] [Accepted: 12/19/2016] [Indexed: 11/30/2022]
Abstract
Target of rapamycin (TOR) is a protein kinase involved in the modulation of mRNA translation and, therefore, in the regulation of protein synthesis. In neurons, the role of TOR is particularly important in the consolidation of long-term memory (LTM). One of the modulators of TOR is brain-derived neurotrophic factor (BDNF), which activates the TOR signaling pathway to promote protein synthesis, synapse strengthening, and the creation of new neural networks. We investigated the gene expression pattern of this pathway during memory consolidation in zebrafish of different ages. Our findings demonstrate that TOR activation in old animals occurs in the early phase of consolidation, and follows a pattern identical to that of BDNF expression. In younger animals, this increase in activation did not occur, and changes in BDNF expression were also not so remarkable. Furthermore, the expression of the main proteins regulated by the synthesis of TOR (i.e., 4EBP and p70S6K) remained identical to that of TOR in all age groups.
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Affiliation(s)
- Carolina da Silva Peixoto
- Programa de Pós Graduação em Ciências Fisiológicas - Fisiologia Animal Comparada, Laboratório de Neurociências, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS 96210900, Brazil
| | - Gustavo Morrone Parfitt
- Programa de Pós Graduação em Ciências Fisiológicas - Fisiologia Animal Comparada, Laboratório de Neurociências, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS 96210900, Brazil
| | - Gisele Eva Bruch
- Programa de Pós Graduação em Ciências Fisiológicas - Fisiologia Animal Comparada, Laboratório de Neurociências, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS 96210900, Brazil
| | - Marcos Freitas Cordeiro
- Programa de Pós Graduação em Ciências Fisiológicas - Fisiologia Animal Comparada, Laboratório de Neurociências, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS 96210900, Brazil
| | - Daniela Volcan Almeida
- Programa de Pós Graduação em Ciências Fisiológicas - Fisiologia Animal Comparada, Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande 96203900, Brazil
| | - Luis Fernando Fernandes Marins
- Programa de Pós Graduação em Ciências Fisiológicas - Fisiologia Animal Comparada, Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande 96203900, Brazil
| | - Daniela Martí Barros
- Programa de Pós Graduação em Ciências Fisiológicas - Fisiologia Animal Comparada, Laboratório de Neurociências, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS 96210900, Brazil.
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Sors A, Krazem A, Kehr J, Yoshitake T, Dominguez G, Henkous N, Letondor C, Mocaer E, Béracochéa DJ. The Synergistic Enhancing-Memory Effect of Donepezil and S 38093 (a Histamine H 3 Antagonist) Is Mediated by Increased Neural Activity in the Septo-hippocampal Circuitry in Middle-Aged Mice. Front Pharmacol 2016; 7:492. [PMID: 28066242 PMCID: PMC5177663 DOI: 10.3389/fphar.2016.00492] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Accepted: 12/01/2016] [Indexed: 01/01/2023] Open
Abstract
Donepezil, an acetylcholinesterase inhibitor, induces only moderate symptomatic effects on memory in Alzheimer’s disease patients. An alternative strategy for treatment of cognitive symptoms could be to act simultaneously on both histaminergic and cholinergic pathways, to create a synergistic effect. To that aim, 14 month old C57/Bl6 mice were administered per oesophagy during nine consecutive days with Donepezil (at 0.1 and 0.3 mg/kg) and S 38093 (at 0.1, 0.3, and 1.0 mg/kg), a H3 histaminergic antagonist developed by Servier, alone or in combination and tested for memory in a contextual memory task that modelized the age-induced memory dysfunction. The present study shows that the combination of Donepezil and S 38093 induced a dose-dependent synergistic memory-enhancing effect in middle-aged mice with a statistically higher size of effect never obtained with compounds alone and without any pharmacokinetic interaction between both compounds. We demonstrated that the memory-enhancing effect of the S 38093 and Donepezil combination is mediated by its action on the septo-hippocampal circuitry, since it canceled out the reduction of CREB phosphorylation (pCREB) observed in these brain areas in vehicle-treated middle-aged animals. Overall, the effects of drug combinations on pCREB in the hippocampus indicate that the synergistic promnesiant effects of the combination on memory performance in middle-aged mice stem primarily from an enhancement of neural activity in the septo-hippocampal system.
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Affiliation(s)
- Aurore Sors
- Pôle d'Innovation Thérapeutique Neuropsychiatrie Servier Suresnes, France
| | - Ali Krazem
- CNRS 5287, Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, Université de Bordeaux UMR, Pessac, France
| | - Jan Kehr
- Pronexus Analytical AB Bromma, Sweden
| | - Takashi Yoshitake
- Section of Pharmacological Neurochemistry, Department of Physiology and Pharmacology, Karolinska Institute Stockholm, Sweden
| | - Gaelle Dominguez
- CNRS 5287, Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, Université de Bordeaux UMR, Pessac, France
| | - Nadia Henkous
- CNRS 5287, Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, Université de Bordeaux UMR, Pessac, France
| | - Claire Letondor
- Pôle d'Innovation Thérapeutique Neuropsychiatrie Servier Suresnes, France
| | - Elisabeth Mocaer
- Pôle d'Innovation Thérapeutique Neuropsychiatrie Servier Suresnes, France
| | - Daniel J Béracochéa
- CNRS 5287, Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, Université de Bordeaux UMR, Pessac, France
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66
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Mury FB, da Silva WC, Barbosa NR, Mendes CT, Bonini JS, Sarkis JES, Cammarota M, Izquierdo I, Gattaz WF, Dias-Neto E. Lithium activates brain phospholipase A2 and improves memory in rats: implications for Alzheimer's disease. Eur Arch Psychiatry Clin Neurosci 2016; 266:607-18. [PMID: 26661385 DOI: 10.1007/s00406-015-0665-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 11/30/2015] [Indexed: 02/07/2023]
Abstract
Phospholipase A2 (Pla2) is required for memory retrieval, and its inhibition in the hippocampus has been reported to impair memory acquisition in rats. Moreover, cognitive decline and memory deficits showed to be reduced in animal models after lithium treatment, prompting us to evaluate possible links between Pla2, lithium and memory. Here, we evaluated the possible modulation of Pla2 activity by a long-term treatment of rats with low doses of lithium and its impact in memory. Wistar rats were trained for the inhibitory avoidance task, treated with lithium for 100 days and tested for perdurability of long-term memory. Hippocampal samples were used for quantifying the expression of 19 brain-expressed Pla2 genes and for evaluating the enzymatic activity of Pla2 using group-specific radio-enzymatic assays. Our data pointed to a significant perdurability of long-term memory, which correlated with increased transcriptional and enzymatic activities of certain members of the Pla2 family (iPla2 and sPla2) after the chronic lithium treatment. Our data suggest new possible targets of lithium, add more information on its pharmacological activity and reinforce the possible use of low doses of lithium for the treatment of neurodegenerative conditions such as the Alzheimer's disease.
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Affiliation(s)
- Fábio B Mury
- Laboratório de Neurociências (LIM27), Instituto de Psiquiatria, Faculdade de Medicina da Universidade de São Paulo, Rua Ovídio Pires de Campos, 785, 05403-010, São Paulo, SP, Brazil
- Pós-Graduação Interunidades em Biotecnologia, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Weber C da Silva
- Centro de Memória, Instituto de Pesquisas Biomédicas, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Departamento de Farmácia, Universidade Estadual do Centro-Oeste, Guarapuava, PR, Brazil
| | - Nádia R Barbosa
- Laboratório de Neurociências (LIM27), Instituto de Psiquiatria, Faculdade de Medicina da Universidade de São Paulo, Rua Ovídio Pires de Campos, 785, 05403-010, São Paulo, SP, Brazil
| | - Camila T Mendes
- Laboratório de Neurociências (LIM27), Instituto de Psiquiatria, Faculdade de Medicina da Universidade de São Paulo, Rua Ovídio Pires de Campos, 785, 05403-010, São Paulo, SP, Brazil
- Pós-Graduação Interunidades em Biotecnologia, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Juliana S Bonini
- Centro de Memória, Instituto de Pesquisas Biomédicas, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Departamento de Farmácia, Universidade Estadual do Centro-Oeste, Guarapuava, PR, Brazil
| | - Jorge Eduardo Souza Sarkis
- Instituto de Pesquisas Energéticas e Nucleares-IPEN-CNEN/SP, Grupo de Caracterização Química e Isotópica, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Martin Cammarota
- Laboratório de Pesquisa de Memória, Instituto do Cérebro, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Ivan Izquierdo
- Centro de Memória, Instituto de Pesquisas Biomédicas, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Wagner F Gattaz
- Laboratório de Neurociências (LIM27), Instituto de Psiquiatria, Faculdade de Medicina da Universidade de São Paulo, Rua Ovídio Pires de Campos, 785, 05403-010, São Paulo, SP, Brazil.
| | - Emmanuel Dias-Neto
- Laboratório de Neurociências (LIM27), Instituto de Psiquiatria, Faculdade de Medicina da Universidade de São Paulo, Rua Ovídio Pires de Campos, 785, 05403-010, São Paulo, SP, Brazil.
- Laboratório de Genômica Médica, Centro Internacional de Pesquisas, AC Camargo Cancer Center, São Paulo, SP, Brazil.
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67
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Mice and rats fail to integrate exogenous timing noise into their time-based decisions. Anim Cogn 2016; 19:1215-1225. [PMID: 27646311 DOI: 10.1007/s10071-016-1033-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 08/27/2016] [Accepted: 09/03/2016] [Indexed: 10/21/2022]
Abstract
Endogenous timing uncertainty results in variability in time-based judgments. In many timing tasks, animals need to incorporate their level of endogenous timing uncertainty into their decisions in order to maximize the reward rate. Although animals have been shown to adopt such optimal behavioral strategies in time-based decisions, whether they can optimize their behavior under exogenous noise is an open question. In this study, we tested mice and rats in a task that required them to space their responses for a minimum duration (DRL task) in different task conditions. In one condition, the minimum wait time was fixed, whereas in other conditions minimum wait time was a Gaussian random variable. Although reward maximization entailed waiting longer with added exogenous timing variability, results indicated that both mice and rats became more impulsive and deviated from optimality with increasing levels of exogenous noise. We introduce a reward-rate-dependent sampling function to SET to account for optimal performance in noiseless and suboptimal performance in noisy environments.
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68
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Beiranvand A, Nasehi M, Zarrindast MR, Moghaddasi M. Involvement of medial prefrontal cortex alpha-2 adrenoceptors on memory acquisition deficit induced by arachidonylcyclopropylamide, a cannabinoid CB1 receptor agonist, in rats; possible involvement of Ca2+ channels. J Psychopharmacol 2016; 30:945-54. [PMID: 27317021 DOI: 10.1177/0269881116652585] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Functional interactions between cannabinoid and alpha-2 adrenergic systems in cognitive control in the medial prefrontal cortex (mPFC) seem possible. The present study evaluated the possible role of alpha-2 adrenoceptors of the prefrontal cortex on effect of arachidonylcyclopropylamide (ACPA), a cannabinoid CB1 receptor (CB1R) agonist, in adult male Wistar rats. The animals were bilaterally implanted with chronic cannulae in the mPFC, trained in a step-through task, and tested 24 h after training to measure step-through latency. Results indicate that pre-training microinjection of ACPA (0.05 and 0.5 μg/rat) and clonidine (alpha-2 adrenoceptor agonist; 1 and 2 μg/rat) reduce memory acquisition. Pre-training subthreshold dose of clonidine (0.5 µg/rat) restored memory-impairing effect of ACPA (0.05 and 0.5 µg/rat). On the other hand, pre-training administration of the alpha-2 adrenoceptor antagonist yohimbine in all doses used (0.5, 1, and 2 μg/rat) did not affect memory acquisition by itself, while a subthreshold dose of yohimbine (2 µg/rat) potentiated memory impairment induced by ACPA (0.005 µg/rat). Finally, a subthreshold dose of SKF96365 (a Ca(2+) channel blocker) blocked clonidine and yohimbine effect of memory responses induced by ACPA. In conclusion, these data indicate that mPFC alpha-2 adrenoceptors play an important role in ACPA-induced amnesia and Ca(2+) channels have a critical role this phenomenon.
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Affiliation(s)
| | - Mohammad Nasehi
- Cognitive and Neuroscience Research Center (CNRC), Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Mohammad-Reza Zarrindast
- Institute for Cognitive Science Studies (ICSS), Tehran, Iran Cognitive and Neuroscience Research Center (CNRC), Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran Iranian National Center for Addiction Studies, Tehran University of Medical Sciences, Tehran, Iran School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran Medical Genomics Research Center, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Mehrnoush Moghaddasi
- Razi Herbal Medicines Research Center, Department of Physiology, Lorestan University of Medical Sciences, Khorramabad, Iran
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Dopaminergic inputs in the dentate gyrus direct the choice of memory encoding. Proc Natl Acad Sci U S A 2016; 113:E5501-10. [PMID: 27573822 DOI: 10.1073/pnas.1606951113] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Rewarding experiences are often well remembered, and such memory formation is known to be dependent on dopamine modulation of the neural substrates engaged in learning and memory; however, it is unknown how and where in the brain dopamine signals bias episodic memory toward preceding rather than subsequent events. Here we found that photostimulation of channelrhodopsin-2-expressing dopaminergic fibers in the dentate gyrus induced a long-term depression of cortical inputs, diminished theta oscillations, and impaired subsequent contextual learning. Computational modeling based on this dopamine modulation indicated an asymmetric association of events occurring before and after reward in memory tasks. In subsequent behavioral experiments, preexposure to a natural reward suppressed hippocampus-dependent memory formation, with an effective time window consistent with the duration of dopamine-induced changes of dentate activity. Overall, our results suggest a mechanism by which dopamine enables the hippocampus to encode memory with reduced interference from subsequent experience.
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70
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Abbas AK, Villers A, Ris L. Temporal phases of long-term potentiation (LTP): myth or fact? Rev Neurosci 2016; 26:507-46. [PMID: 25992512 DOI: 10.1515/revneuro-2014-0072] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 03/12/2015] [Indexed: 12/11/2022]
Abstract
Long-term potentiation (LTP) remains the most widely accepted model for learning and memory. In accordance with this belief, the temporal differentiation of LTP into early and late phases is accepted as reflecting the differentiation of short-term and long-term memory. Moreover, during the past 30 years, protein synthesis inhibitors have been used to separate the early, protein synthesis-independent (E-LTP) phase and the late, protein synthesis-dependent (L-LTP) phase. However, the role of these proteins has not been formally identified. Additionally, several reports failed to show an effect of protein synthesis inhibitors on LTP. In this review, a detailed analysis of extensive behavioral and electrophysiological data reveals that the presumed correspondence of LTP temporal phases to memory phases is neither experimentally nor theoretically consistent. Moreover, an overview of the time courses of E-LTP in hippocampal slices reveals a wide variability ranging from <1 h to more than 5 h. The existence of all these conflictual findings should lead to a new vision of LTP. We believe that the E-LTP vs. L-LTP distinction, established with protein synthesis inhibitor studies, reflects a false dichotomy. We suggest that the duration of LTP and its dependency on protein synthesis are related to the availability of a set of proteins at synapses and not to the de novo synthesis of plasticity-related proteins. This availability is determined by protein turnover kinetics, which is regulated by previous and ongoing electrical activities and by energy store availability.
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71
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Luczak V, Blackwell KT, Abel T, Girault JA, Gervasi N. Dendritic diameter influences the rate and magnitude of hippocampal cAMP and PKA transients during β-adrenergic receptor activation. Neurobiol Learn Mem 2016; 138:10-20. [PMID: 27523748 DOI: 10.1016/j.nlm.2016.08.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 07/15/2016] [Accepted: 08/11/2016] [Indexed: 12/19/2022]
Abstract
In the hippocampus, cyclic-adenosine monophosphate (cAMP) and cAMP-dependent protein kinase (PKA) form a critical signaling cascade required for long-lasting synaptic plasticity, learning and memory. Plasticity and memory are known to occur following pathway-specific changes in synaptic strength that are thought to result from spatially and temporally coordinated intracellular signaling events. To better understand how cAMP and PKA dynamically operate within the structural complexity of hippocampal neurons, we used live two-photon imaging and genetically-encoded fluorescent biosensors to monitor cAMP levels or PKA activity in CA1 neurons of acute hippocampal slices. Stimulation of β-adrenergic receptors (isoproterenol) or combined activation of adenylyl cyclase (forskolin) and inhibition of phosphodiesterase (IBMX) produced cAMP transients with greater amplitude and rapid on-rates in intermediate and distal dendrites compared to somata and proximal dendrites. In contrast, isoproterenol produced greater PKA activity in somata and proximal dendrites compared to intermediate and distal dendrites, and the on-rate of PKA activity did not differ between compartments. Computational models show that our observed compartmental difference in cAMP can be reproduced by a uniform distribution of PDE4 and a variable density of adenylyl cyclase that scales with compartment size to compensate for changes in surface to volume ratios. However, reproducing our observed compartmental difference in PKA activity required enrichment of protein phosphatase in small compartments; neither reduced PKA subunits nor increased PKA substrates were sufficient. Together, our imaging and computational results show that compartment diameter interacts with rate-limiting components like adenylyl cyclase, phosphodiesterase and protein phosphatase to shape the spatial and temporal components of cAMP and PKA signaling in CA1 neurons and suggests that small neuronal compartments are most sensitive to cAMP signals whereas large neuronal compartments accommodate a greater dynamic range in PKA activity.
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Affiliation(s)
- Vincent Luczak
- University of Pennsylvania, Department of Biology, 10-133 Smilow Center for Translational Research, 3400 Civic Center Boulevard, Building 421, Philadelphia, PA 19104, USA
| | - Kim T Blackwell
- George Mason University, The Krasnow Institute for Advanced Studies, MS 2A1, Rockfish Creek Lane, Fairfax, VA 22030, USA
| | - Ted Abel
- University of Pennsylvania, Department of Biology, 10-133 Smilow Center for Translational Research, 3400 Civic Center Boulevard, Building 421, Philadelphia, PA 19104, USA.
| | - Jean-Antoine Girault
- INSERM, UMR-S 839, 75005 Paris, France; Université Pierre et Marie Curie (UPMC, Paris 6), Sorbonne Universités, 75005 Paris, France; Institut du Fer à Moulin, 17 Rue du Fer à Moulin, 75005 Paris, France
| | - Nicolas Gervasi
- INSERM, UMR-S 839, 75005 Paris, France; Université Pierre et Marie Curie (UPMC, Paris 6), Sorbonne Universités, 75005 Paris, France; Institut du Fer à Moulin, 17 Rue du Fer à Moulin, 75005 Paris, France.
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72
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Yu XW, Oh MM, Disterhoft JF. CREB, cellular excitability, and cognition: Implications for aging. Behav Brain Res 2016; 322:206-211. [PMID: 27478142 DOI: 10.1016/j.bbr.2016.07.042] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 07/11/2016] [Accepted: 07/27/2016] [Indexed: 10/21/2022]
Abstract
Humans and laboratory animals display cognitive deficits as they age. However, there are currently no effective therapies available to treat these deficits, as the underlying mechanisms are poorly understood. Studies using pharmacological compounds have found a link between cognitive performance and the intrinsic cellular excitability of CA1 hippocampal neurons. Therefore, it is of great interest to identify molecular regulators that may be influencing both cognition and neuronal excitability, which could be changed with age. One possible regulator is the transcription factor cAMP response element binding-protein (CREB). In young adult animals, manipulation of CREB activity has resulted in modulation of both cognitive performance on behavioral tasks, and neuronal excitability. While evidence is sparse, studies also point to a dysfunction in CREB signaling with aging. We propose that CREB may be a viable therapeutic target for the treatment of age-related cognitive deficits, along with potential experiments to test this hypothesis.
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Affiliation(s)
- Xiao-Wen Yu
- Department of Physiology, Feinberg School of Medicine, Northwestern University, 303 E Chicago Avenue, Chicago, IL 60611, USA.
| | - M Matthew Oh
- Department of Physiology, Feinberg School of Medicine, Northwestern University, 303 E Chicago Avenue, Chicago, IL 60611, USA.
| | - John F Disterhoft
- Department of Physiology, Feinberg School of Medicine, Northwestern University, 303 E Chicago Avenue, Chicago, IL 60611, USA.
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73
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Mustroph ML, Pinardo H, Merritt JR, Rhodes JS. Parameters for abolishing conditioned place preference for cocaine from running and environmental enrichment in male C57BL/6J mice. Behav Brain Res 2016; 312:366-73. [PMID: 27363922 DOI: 10.1016/j.bbr.2016.06.049] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/21/2016] [Accepted: 06/26/2016] [Indexed: 12/21/2022]
Abstract
RATIONALE Evidence suggests that 4 weeks of voluntary wheel running abolishes conditioned place preference (CPP) for cocaine in male C57BL/6J mice. OBJECTIVES To determine the duration and timing of exposure to running wheels necessary to reduce CPP, and the extent to which the running per se influences CPP as compared to environmental enrichment without running. METHODS A total of 239 males were conditioned for 4days twice daily with cocaine (10mg/kg) and then split into 7 intervention groups prior to 4days of CPP testing. Experiment 1 consisted of two groups housed as follows: short sedentary group (SS; n=20) in normal cages for 1 week; the short running group (SR; n=20) with running wheels for 1 week. Experiment 2 consisted of five groups housed as follows; short 1 week of running followed by a 3 week sedentary period (SRS; n=20); a 3 week sedentary period followed by 1 week of running (SSR; n=20); long sedentary group (LS; n=66) in normal cages for 4 weeks; long running group (LR; n=66) with running wheels for 4 weeks; and long environmental enrichment group (EE; n=27) with toys for 4 weeks. RESULTS Levels of running were similar in all running groups. Both running and environmental enrichment reduced CPP relative to sedentary groups. CONCLUSIONS Results suggest that the abolishment of cocaine CPP from running is robust and occurs with as low as 1 week of intervention but may be related to enrichment component of running rather than physical activity.
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Affiliation(s)
- M L Mustroph
- University of Illinois at Urbana-Champaign, Beckman Institute of Advanced Science and Technology, 405 N. Mathews Avenue, Urbana, IL 61801, USA.
| | - H Pinardo
- University of Illinois at Urbana-Champaign, Beckman Institute of Advanced Science and Technology, 405 N. Mathews Avenue, Urbana, IL 61801, USA
| | - J R Merritt
- University of Illinois at Urbana-Champaign, Beckman Institute of Advanced Science and Technology, 405 N. Mathews Avenue, Urbana, IL 61801, USA
| | - J S Rhodes
- University of Illinois at Urbana-Champaign, Beckman Institute of Advanced Science and Technology, 405 N. Mathews Avenue, Urbana, IL 61801, USA
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74
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Fabbri R, Furini CRG, Passani MB, Provensi G, Baldi E, Bucherelli C, Izquierdo I, de Carvalho Myskiw J, Blandina P. Memory retrieval of inhibitory avoidance requires histamine H1 receptor activation in the hippocampus. Proc Natl Acad Sci U S A 2016; 113:E2714-20. [PMID: 27118833 PMCID: PMC4868453 DOI: 10.1073/pnas.1604841113] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Retrieval represents a dynamic process that may require neuromodulatory signaling. Here, we report that the integrity of the brain histaminergic system is necessary for retrieval of inhibitory avoidance (IA) memory, because rats depleted of histamine through lateral ventricle injections of α-fluoromethylhistidine (a-FMHis), a suicide inhibitor of histidine decarboxylase, displayed impaired IA memory when tested 2 d after training. a-FMHis was administered 24 h after training, when IA memory trace was already formed. Infusion of histamine in hippocampal CA1 of brain histamine-depleted rats (hence, amnesic) 10 min before the retention test restored IA memory but was ineffective when given in the basolateral amygdala (BLA) or the ventral medial prefrontal cortex (vmPFC). Intra-CA1 injections of selective H1 and H2 receptor agonists showed that histamine exerted its effect by activating the H1 receptor. Noteworthy, the H1 receptor antagonist pyrilamine disrupted IA memory retrieval in rats, thus strongly supporting an active involvement of endogenous histamine; 90 min after the retention test, c-Fos-positive neurons were significantly fewer in the CA1s of a-FMHis-treated rats that displayed amnesia compared with in the control group. We also found reduced levels of phosphorylated cAMP-responsive element binding protein (pCREB) in the CA1s of a-FMHis-treated animals compared with in controls. Increases in pCREB levels are associated with retrieval of associated memories. Targeting the histaminergic system may modify the retrieval of emotional memory; hence, histaminergic ligands might reduce dysfunctional aversive memories and improve the efficacy of exposure psychotherapies.
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Affiliation(s)
- Roberta Fabbri
- Memory Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul, 90610-000 Porto Alegre, RS, Brazil; Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmacologia e Tossicologia, Universitá di Firenze, 50139 Florence, Italy
| | - Cristiane Regina Guerino Furini
- Memory Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul, 90610-000 Porto Alegre, RS, Brazil
| | - Maria Beatrice Passani
- Dipartimento di Scienze della Salute, Sezione di Farmacologia e Chemioterapia, Universitá di Firenze, 50139 Florence, Italy
| | - Gustavo Provensi
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmacologia e Tossicologia, Universitá di Firenze, 50139 Florence, Italy
| | - Elisabetta Baldi
- Dipartimento di Medicina Sperimentale e Clinica, Universitá di Firenze, 50134 Florence, Italy
| | - Corrado Bucherelli
- Dipartimento di Medicina Sperimentale e Clinica, Universitá di Firenze, 50134 Florence, Italy
| | - Ivan Izquierdo
- Memory Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul, 90610-000 Porto Alegre, RS, Brazil;
| | - Jociane de Carvalho Myskiw
- Memory Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul, 90610-000 Porto Alegre, RS, Brazil;
| | - Patrizio Blandina
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmacologia e Tossicologia, Universitá di Firenze, 50139 Florence, Italy;
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Naderi M, Jamwal A, Chivers DP, Niyogi S. Modulatory effects of dopamine receptors on associative learning performance in zebrafish (Danio rerio). Behav Brain Res 2016; 303:109-19. [DOI: 10.1016/j.bbr.2016.01.034] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 01/14/2016] [Accepted: 01/15/2016] [Indexed: 12/14/2022]
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76
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Moraga-Amaro R, González H, Ugalde V, Donoso-Ramos JP, Quintana-Donoso D, Lara M, Morales B, Rojas P, Pacheco R, Stehberg J. Dopamine receptor D5 deficiency results in a selective reduction of hippocampal NMDA receptor subunit NR2B expression and impaired memory. Neuropharmacology 2016; 103:222-35. [DOI: 10.1016/j.neuropharm.2015.12.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 11/30/2015] [Accepted: 12/17/2015] [Indexed: 11/16/2022]
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77
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Guerra GP, Rubin MA, Mello CF. Modulation of learning and memory by natural polyamines. Pharmacol Res 2016; 112:99-118. [PMID: 27015893 DOI: 10.1016/j.phrs.2016.03.023] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Revised: 03/09/2016] [Accepted: 03/11/2016] [Indexed: 01/08/2023]
Abstract
Spermine and spermidine are natural polyamines that are produced mainly via decarboxylation of l-ornithine and the sequential transfer of aminopropyl groups from S-adenosylmethionine to putrescine by spermidine synthase and spermine synthase. Spermine and spermidine interact with intracellular and extracellular acidic residues of different nature, including nucleic acids, phospholipids, acidic proteins, carboxyl- and sulfate-containing polysaccharides. Therefore, multiple actions have been suggested for these polycations, including modulation of the activity of ionic channels, protein synthesis, protein kinases, and cell proliferation/death, within others. In this review we summarize these neurochemical/neurophysiological/morphological findings, particularly those that have been implicated in the improving and deleterious effects of spermine and spermidine on learning and memory of naïve animals in shock-motivated and nonshock-motivated tasks, from a historical perspective. The interaction with the opioid system, the facilitation and disruption of morphine-induced reward and the effect of polyamines and putative polyamine antagonists on animal models of cognitive diseases, such as Alzheimer's, Huntington, acute neuroinflammation and brain trauma are also reviewed and discussed. The increased production of polyamines in Alzheimer's disease and the biphasic nature of the effects of polyamines on memory and on the NMDA receptor are also considered. In light of the current literature on polyamines, which include the description of an inborn error of the metabolism characterized by mild-to moderate mental retardation and polyamine metabolism alterations in suicide completers, we can anticipate that polyamine targets may be important for the development of novel strategies and approaches for understanding the etiopathogenesis of important central disorders and their pharmacological treatment.
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Affiliation(s)
- Gustavo Petri Guerra
- Department of Food Technology, Federal Technological University of Paraná, Campus Medianeira, Medianeira, PR 85884-000, Brazil
| | - Maribel Antonello Rubin
- Department of Biochemistry, Center of Exact and Natural Sciences, Federal University of Santa Maria (UFSM), Santa Maria, RS 97105-900, Brazil.
| | - Carlos Fernando Mello
- Department of Physiology and Pharmacology, Center of Health Sciences, Federal University of Santa Maria (UFSM), Santa Maria, RS 97105-900, Brazil.
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78
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Ghasemzadeh Z, Rezayof A. Role of hippocampal and prefrontal cortical signaling pathways in dextromethorphan effect on morphine-induced memory impairment in rats. Neurobiol Learn Mem 2016; 128:23-32. [DOI: 10.1016/j.nlm.2015.11.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 11/22/2015] [Accepted: 11/28/2015] [Indexed: 11/29/2022]
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79
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Mulder CK, Gerkema MP, Van der Zee EA. Role of Aging and Hippocampus in Time-Place Learning: Link to Episodic-Like Memory? Front Behav Neurosci 2016; 9:362. [PMID: 26834595 PMCID: PMC4717310 DOI: 10.3389/fnbeh.2015.00362] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 12/14/2015] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION With time-place learning (TPL), animals link an event with the spatial location and the time of day (TOD). The what-where-when TPL components make the task putatively episodic-like in nature. Animals use an internal sense of time to master TPL, which is circadian system based. Finding indications for a role of the hippocampus and (early) aging-sensitivity in TPL would strengthen the episodic-like memory nature of the paradigm. METHODS Previously, we used C57Bl/6 mice for our TPL research. Here, we used CD1 mice which are less hippocampal-driven and age faster compared to C57Bl/6 mice. To demonstrate the low degree of hippocampal-driven performance in CD1 mice, a cross maze was used. The spontaneous alternation test was used to score spatial working memory in CD1 mice at four different age categories (young (3-6 months), middle-aged (7-11 months), aged (12-18 months) and old (>19 months). TPL performance of middle-aged and aged CD1 mice was tested in a setup with either two or three time points per day (2-arm or 3-arm TPL task). Immunostainings were applied on brains of young and middle-aged C57Bl/6 mice that had successfully mastered the 3-arm TPL task. RESULTS In contrast to C57Bl/6 mice, middle-aged and aged CD1 mice were less hippocampus-driven and failed to master the 3-arm TPL task. They could, however, master the 2-arm TPL task primarily via an ordinal (non-circadian) timing system. c-Fos, CRY2, vasopressin (AVP), and phosphorylated cAMP response element-binding protein (pCREB) were investigated. We found no differences at the level of the suprachiasmatic nucleus (SCN; circadian master clock), whereas CRY2 expression was increased in the hippocampal dentate gyrus (DG). The most pronounced difference between TPL trained and control mice was found in c-Fos expression in the paraventricular thalamic nucleus, a circadian system relay station. CONCLUSIONS These results further indicate a key role of CRY proteins in TPL and confirm the limited role of the SCN in TPL. Based on the poor TPL performance of CD1 mice, the results suggest age-sensitivity and hippocampal involvement in TPL. We suspect that TPL reflects an episodic-like memory task, but due to its functional nature, also entail the translation of experienced episodes into semantic rules acquired by training.
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Affiliation(s)
- C K Mulder
- Department of Molecular Neurobiology, University of GroningenGroningen, Netherlands; Department of Chronobiology, University of GroningenGroningen, Netherlands
| | - M P Gerkema
- Department of Chronobiology, University of Groningen Groningen, Netherlands
| | - E A Van der Zee
- Department of Molecular Neurobiology, University of Groningen Groningen, Netherlands
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80
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Keil MF, Briassoulis G, Stratakis CA. The Role of Protein Kinase A in Anxiety Behaviors. Neuroendocrinology 2016; 103:625-39. [PMID: 26939049 DOI: 10.1159/000444880] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 02/19/2016] [Indexed: 11/19/2022]
Abstract
This review focuses on the genetic and other evidence supporting the notion that the cyclic AMP (cAMP) signaling pathway and its mediator, the protein kinase A (PKA) enzyme, which respond to environmental stressors and regulate stress responses, are central to the pathogenesis of disorders related to anxiety. We describe the PKA pathway and review in vitro animal studies (mouse) and other evidence that support the importance of PKA in regulating behaviors that lead to anxiety. Since cAMP signaling and PKA have been pharmacologically exploited since the 1940s (even before the identification of cAMP as a second messenger with PKA as its mediator) for a number of disorders from asthma to cardiovascular diseases, there is ample opportunity to develop therapies using this new knowledge about cAMP, PKA, and anxiety disorders.
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Affiliation(s)
- Margaret F Keil
- Section on Endocrinology and Genetics, Program in Developmental Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Institutes of Health, Bethesda, Md., USA
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81
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Identification and Characterization of the V(D)J Recombination Activating Gene 1 in Long-Term Memory of Context Fear Conditioning. Neural Plast 2015; 2016:1752176. [PMID: 26843989 PMCID: PMC4710954 DOI: 10.1155/2016/1752176] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 10/12/2015] [Indexed: 12/17/2022] Open
Abstract
An increasing body of evidence suggests that mechanisms related to the introduction and repair of DNA double strand breaks (DSBs) may be associated with long-term memory (LTM) processes. Previous studies from our group suggested that factors known to function in DNA recombination/repair machineries, such as DNA ligases, polymerases, and DNA endonucleases, play a role in LTM. Here we report data using C57BL/6 mice showing that the V(D)J recombination-activating gene 1 (RAG1), which encodes a factor that introduces DSBs in immunoglobulin and T-cell receptor genes, is induced in the amygdala, but not in the hippocampus, after context fear conditioning. Amygdalar induction of RAG1 mRNA, measured by real-time PCR, was not observed in context-only or shock-only controls, suggesting that the context fear conditioning response is related to associative learning processes. Furthermore, double immunofluorescence studies demonstrated the neuronal localization of RAG1 protein in amygdalar sections prepared after perfusion and fixation. In functional studies, intra-amygdalar injections of RAG1 gapmer antisense oligonucleotides, given 1 h prior to conditioning, resulted in amygdalar knockdown of RAG1 mRNA and a significant impairment in LTM, tested 24 h after training. Overall, these findings suggest that the V(D)J recombination-activating gene 1, RAG1, may play a role in LTM consolidation.
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82
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Bunzeck N, Thiel C. Neurochemical modulation of repetition suppression and novelty signals in the human brain. Cortex 2015; 80:161-73. [PMID: 26625882 DOI: 10.1016/j.cortex.2015.10.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 09/22/2015] [Accepted: 10/15/2015] [Indexed: 12/11/2022]
Abstract
The repeated processing of a sensory stimulus, such as a picture or sound, leads to a decrement in response in neurons that fired to the initial presentation. These effects are well known from single cell recordings in the inferior temporal cortex in monkeys, and functional neuroimaging in humans on large-scale neural activity could show similar effects in extrastriate, frontal and medial temporal lobe (MTL) regions. The role of specific neurotransmitters in repeated processing of information is, however, less clear. In the first part of this article, we will introduce the two concepts of repetition suppression and novelty signals, which is followed by a brief overview of pharmacological neuroimaging in humans. We will then summarize human studies suggesting that gamma-aminobutyric-acid (GABA) and acetylcholine (ACh) play an important role in modulating behavioral priming and associated repetition suppression in extrastriate and frontal brain regions. Finally, we review studies on neural novelty signals in the dopaminergic mesolimbic system, and conclude that dopamine (DA) regulates the temporal aspects of novelty processing and closely relates to long-term memory encoding rather than behavioral priming. As such, this review describes differential roles of GABA, ACh and DA in repeated stimulus processing, and further suggests that repetition suppression and neural novelty signals may not be two sides of the same coin but rather independent processes.
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Affiliation(s)
- Nico Bunzeck
- Department of Psychology, University of Lübeck, Lübeck, Germany; Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
| | - Christiane Thiel
- Biological Psychology, Department of Psychology, European Medical School, Carl von Ossietzky University Oldenburg, Oldenburg, Germany; Cluster of Excellence "Hearing4all" and Research Center Neurosensory Science, Carl von Ossietzky University Oldenburg, Oldenburg, Germany
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83
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Li H, Wang J, Wang P, Rao Y, Chen L. Resveratrol Reverses the Synaptic Plasticity Deficits in a Chronic Cerebral Hypoperfusion Rat Model. J Stroke Cerebrovasc Dis 2015; 25:122-8. [PMID: 26456198 DOI: 10.1016/j.jstrokecerebrovasdis.2015.09.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 08/29/2015] [Accepted: 09/06/2015] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Dementia is the most prevalent neurological disease in aged people. Chronic cerebral hypoperfusion (CCH) is one of the causes of vascular dementia (VaD) and is also an etiological factor for Alzheimer's disease (AD). However, effective therapy for those two diseases is still missing. Resveratrol is a polyphenol produced by plants that have multiple biological functions, such as increased life span and delay in the onset of diseases associated with aging. It is known supplement with resveratrol could exert neuroprotection against multiple injury factors induced neuronal death and degeneration, as well as the cognitive decline of CCH rat model. METHODS The morris water maze was used to evaluate the learning and memory, electrophysiological recording was used to detect the synaptic plasticity, the Golgi staining was used to examine the change of dendritic spines, the western blot was used to detect the proteins levels. RESULTS We reported that resveratrol pretreatment effectively restore the synaptic plasticity in CCH rats both functional and structural. We also found that the PKA-CREB activation may be a major player in resveratrol-mediated neuroprotection in CCH model. CONCLUSIONS Our data provide the mechanistic evidence for the neuroprotective effects of resveratrol in vascular dementia.
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Affiliation(s)
- Huagang Li
- Department of Neurology, Zhongnan Hospital, Wuhan University, China.
| | - Jing Wang
- Department of Neurology, Zhongnan Hospital, Wuhan University, China
| | - Pu Wang
- Department of Rehabilitation, West China Hospital, Sichuang University, China
| | - Yan Rao
- Animal Biosafety Level III Laboratory at the Center for Animal Experiment, Wuhan University, China
| | - Liping Chen
- Department of Gastroenterology, Zhongnan Hospital, Wuhan University, China
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84
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Grogan J, Bogacz R, Tsivos D, Whone A, Coulthard E. Dopamine and Consolidation of Episodic Memory: Timing is Everything. J Cogn Neurosci 2015; 27:2035-50. [PMID: 26102227 PMCID: PMC4880040 DOI: 10.1162/jocn_a_00840] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Memory consolidation underpins adaptive behavior and dopaminergic networks may be critical for prolonged, selective information storage. To understand the time course of the dopaminergic contribution to memory consolidation in humans, here we investigate the effect of dopaminergic medication on recall and recognition in the short and longer term in Parkinson disease (PD). Fifteen people with PD were each tested on or off dopaminergic medication during learning/early consolidation (Day 1) and/or late consolidation (Day 2). Fifteen age-matched healthy participants were tested only once. On Day 1 participants learned new information, and early episodic memory was tested after 30 min. Then on Day 2, recall and recognition were retested after a 24-hr delay. Participants on medication on Day 1 recalled less information at 30 min and 24 hr. In contrast, patients on medication on Day 2 (8-24 hr after learning) recalled more information at 24 hr than those off medication. Although recognition sensitivity was unaffected by medication, response bias was dependent on dopaminergic state: Medication during learning induced a more liberal bias 24 hr later, whereas patients off medication during learning were more conservative responders 24 hr later. We use computational modeling to propose possible mechanisms for this change in response bias. In summary, dopaminergic medication in PD patients during learning impairs early consolidation of episodic memory and makes delayed responses more liberal, but enhances late memory consolidation presumably through a dopamine-dependent consolidation pathway that may be active during sleep.
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Affiliation(s)
| | | | | | - Alan Whone
- University of Bristol
- North Bristol NHS Trust
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85
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Chai AP, Ma WP, Wang LP, Cao J, Xu L, Yang YX, Mao RR. Chronic constant light-induced hippocampal late-phase long-term potentiation impairment in vitro is attenuated by antagonist of D1/D5 receptors. Brain Res 2015; 1622:72-80. [DOI: 10.1016/j.brainres.2015.06.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 05/05/2015] [Accepted: 06/17/2015] [Indexed: 12/25/2022]
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86
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The learning of fear extinction. Neurosci Biobehav Rev 2015; 47:670-83. [PMID: 25452113 DOI: 10.1016/j.neubiorev.2014.10.016] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 10/19/2014] [Accepted: 10/20/2014] [Indexed: 11/23/2022]
Abstract
Recent work on the extinction of fear-motivated learning places emphasis on its putative circuitry and on its modulation. Extinction is the learned inhibition of retrieval of previously acquired responses. Fear extinction is used as a major component of exposure therapy in the treatment of fear memories such as those of the posttraumatic stress disorder (PTSD). It is initiated and maintained by interactions between the hippocampus, basolateral amygdala and ventromedial prefrontal cortex, which involve feedback regulation of the latter by the other two areas. Fear extinction depends on NMDA receptor activation. It is positively modulated by d-serine acting on the glycine site of NMDA receptors and blocked by AP5 (2-amino-5-phosphono propionate) in the three structures. In addition, histamine acting on H2 receptors and endocannabinoids acting on CB1 receptors in the three brain areas mentioned, and muscarinic cholinergic fibers from the medial septum to hippocampal CA1 positively modulate fear extinction. Importantly, fear extinction can be made state-dependent on circulating epinephrine, which may play a role in situations of stress. Exposure to a novel experience can strongly enhance the consolidation of fear extinction through a synaptic tagging and capture mechanism; this may be useful in the therapy of states caused by fear memory like PTSD.
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87
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Region-specific alterations of AMPA receptor phosphorylation and signaling pathways in the pilocarpine model of epilepsy. Neurochem Int 2015; 87:22-33. [DOI: 10.1016/j.neuint.2015.05.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 05/06/2015] [Accepted: 05/07/2015] [Indexed: 01/27/2023]
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88
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Li YP, Yang GJ, Jin L, Yang HM, Chen J, Chai GS, Wang L. Erythropoietin attenuates Alzheimer-like memory impairments and pathological changes induced by amyloid β42 in mice. Brain Res 2015; 1618:159-67. [DOI: 10.1016/j.brainres.2015.05.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 05/23/2015] [Accepted: 05/25/2015] [Indexed: 01/05/2023]
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89
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Wu L, Zhao QS, Li TW, Li HY, Wang QB, Bi XY, Cai XK, Tang N. Yifei Xuanfei Jiangzhuo formula, a Chinese herbal decoction, improves memory impairment through inhibiting apoptosis and enhancing PKA/CREB signal transduction in rats with cerebral ischemia/reperfusion. Mol Med Rep 2015; 12:4273-4283. [PMID: 26094797 PMCID: PMC4526035 DOI: 10.3892/mmr.2015.3962] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 05/15/2015] [Indexed: 12/20/2022] Open
Abstract
Apoptosis and the dysfunction of the cyclic adenosine monophosphate (cAMP)/protein kinase A (PKA)/cAMP-responsive element binding protein (CREB) signaling pathway have a key role in memory impairment in vascular dementia (VaD), a challenging clinical problem. Yifei Xuanfei Jiangzhuo formula (YXJF), a Chinese herbal decoction, has been used to treat VaD in clinical practice and has produced positive outcomes; however, convincing evidence is currently lacking. The present study aimed to investigate the effects of YXJF on memory impairment in rats with cerebral ischemia/reperfusion and to explore the underlying mechanism. YXJF ameliorated memory impairment in rats with cerebral ischemia/reperfusion, inhibited hippocampal apoptosis in a dose-dependent manner and attenuated increases in the protein expression of B-cell lymphoma 2 (Bcl-2)-associated X protein as well as c-Jun and a reduction in Bcl-2 protein expression in the hippocampal tissue of the rats. Furthermore, administration of YXJF significantly increased the protein expression of PKA C-α and CREB, and promoted CREB phosphorylation. The results indicated that YXJF improves memory impairment through inhibiting apoptosis and enhancing PKA/CREB signal transduction in rats with cerebral ischemia/reperfusion.
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Affiliation(s)
- Lin Wu
- Guangxi Scientific Experimental Center of Traditional Chinese Medicine, Guangxi University of Chinese Medicine, Nanning, Guangxi 530001, P.R. China
| | - Qing-Shan Zhao
- Graduate School, Hunan University of Chinese Medicine, Changsha, Hunan 410208, P.R. China
| | - Tian-Wei Li
- Guangxi Scientific Experimental Center of Traditional Chinese Medicine, Guangxi University of Chinese Medicine, Nanning, Guangxi 530001, P.R. China
| | - Hai-Yuan Li
- Guangxi Scientific Experimental Center of Traditional Chinese Medicine, Guangxi University of Chinese Medicine, Nanning, Guangxi 530001, P.R. China
| | - Qing-Bi Wang
- Guangxi Scientific Experimental Center of Traditional Chinese Medicine, Guangxi University of Chinese Medicine, Nanning, Guangxi 530001, P.R. China
| | - Xin-Ya Bi
- Guangxi Scientific Experimental Center of Traditional Chinese Medicine, Guangxi University of Chinese Medicine, Nanning, Guangxi 530001, P.R. China
| | - Xin-Kun Cai
- Guangxi Scientific Experimental Center of Traditional Chinese Medicine, Guangxi University of Chinese Medicine, Nanning, Guangxi 530001, P.R. China
| | - Nong Tang
- Guangxi Scientific Experimental Center of Traditional Chinese Medicine, Guangxi University of Chinese Medicine, Nanning, Guangxi 530001, P.R. China
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90
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O'Connor WT, O'Shea SD. Clozapine and GABA transmission in schizophrenia disease models. Pharmacol Ther 2015; 150:47-80. [DOI: 10.1016/j.pharmthera.2015.01.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 01/06/2015] [Indexed: 11/30/2022]
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91
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Werlen E, Jones MW. Modulating the map: dopaminergic tuning of hippocampal spatial coding and interactions. PROGRESS IN BRAIN RESEARCH 2015; 219:187-216. [PMID: 26072240 DOI: 10.1016/bs.pbr.2015.03.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Salient events activate the midbrain dopaminergic system and have important impacts on various aspects of mnemonic function, including the stability of hippocampus-dependent memories. Dopamine is also central to modulation of neocortical memory processing, particularly during prefrontal cortex-dependent working memory. Here, we review the current state of the circuitry and physiology underlying dopamine's actions, suggesting that--alongside local effects within hippocampus and prefrontal cortex--dopamine released from the midbrain ventral tegmental area is well positioned to dynamically tune interactions between limbic-cortical circuits through modulation of rhythmic network activity.
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Affiliation(s)
- Emilie Werlen
- School of Physiology and Pharmacology, University of Bristol, University Walk, Bristol, UK.
| | - Matthew W Jones
- School of Physiology and Pharmacology, University of Bristol, University Walk, Bristol, UK
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92
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Benetti F, Furini CRG, de Carvalho Myskiw J, Provensi G, Passani MB, Baldi E, Bucherelli C, Munari L, Izquierdo I, Blandina P. Histamine in the basolateral amygdala promotes inhibitory avoidance learning independently of hippocampus. Proc Natl Acad Sci U S A 2015; 112:E2536-42. [PMID: 25918368 PMCID: PMC4434720 DOI: 10.1073/pnas.1506109112] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Recent discoveries demonstrated that recruitment of alternative brain circuits permits compensation of memory impairments following damage to brain regions specialized in integrating and/or storing specific memories, including both dorsal hippocampus and basolateral amygdala (BLA). Here, we first report that the integrity of the brain histaminergic system is necessary for long-term, but not for short-term memory of step-down inhibitory avoidance (IA). Second, we found that phosphorylation of cyclic adenosine monophosphate (cAMP) responsive-element-binding protein, a crucial mediator in long-term memory formation, correlated anatomically and temporally with histamine-induced memory retrieval, showing the active involvement of histamine function in CA1 and BLA in different phases of memory consolidation. Third, we found that exogenous application of histamine in either hippocampal CA1 or BLA of brain histamine-depleted rats, hence amnesic, restored long-term memory; however, the time frame of memory rescue was different for the two brain structures, short lived (immediately posttraining) for BLA, long lasting (up to 6 h) for the CA1. Moreover, long-term memory was formed immediately after training restoring of histamine transmission only in the BLA. These findings reveal the essential role of histaminergic neurotransmission to provide the brain with the plasticity necessary to ensure memorization of emotionally salient events, through recruitment of alternative circuits. Hence, our findings indicate that the histaminergic system comprises parallel, coordinated pathways that provide compensatory plasticity when one brain structure is compromised.
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Affiliation(s)
- Fernando Benetti
- Memory Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul, 90610-000 Porto Alegre, RS, Brazil
| | - Cristiane Regina Guerino Furini
- Memory Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul, 90610-000 Porto Alegre, RS, Brazil
| | - Jociane de Carvalho Myskiw
- Memory Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul, 90610-000 Porto Alegre, RS, Brazil
| | - Gustavo Provensi
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmacologia e Tossicologia, Universitá di Firenze, 50139 Firenze, Italy; and
| | - Maria Beatrice Passani
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmacologia e Tossicologia, Universitá di Firenze, 50139 Firenze, Italy; and
| | - Elisabetta Baldi
- Dipartimento di Medicina Sperimentale e Clinica, Universitá di Firenze, 50134 Firenze, Italy
| | - Corrado Bucherelli
- Dipartimento di Medicina Sperimentale e Clinica, Universitá di Firenze, 50134 Firenze, Italy
| | - Leonardo Munari
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmacologia e Tossicologia, Universitá di Firenze, 50139 Firenze, Italy; and
| | - Ivan Izquierdo
- Memory Center, Brain Institute of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul, 90610-000 Porto Alegre, RS, Brazil;
| | - Patrizio Blandina
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmacologia e Tossicologia, Universitá di Firenze, 50139 Firenze, Italy; and
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93
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Walters BJ, Zovkic IB. Building up and knocking down: an emerging role for epigenetics and proteasomal degradation in systems consolidation. Neuroscience 2015; 300:39-52. [PMID: 25967264 DOI: 10.1016/j.neuroscience.2015.05.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 04/18/2015] [Accepted: 05/03/2015] [Indexed: 01/30/2023]
Abstract
Memory formation is a protracted process in which recently acquired events are consolidated to produce stable and specific associations. Initially, newly acquired information undergoes cellular consolidation in the hippocampus, which transiently supports the storage of recently acquired memories. In contrast, remote, or "old" memories are maintained in the cortex and show almost complete independence from the hippocampus. Memories are transferred from the hippocampus to the cortex through a process termed systems consolidation. Emerging evidence suggests that recurrent activation, or "training" of the cortex by the hippocampus is vital to systems consolidation. This process involves prolonged waves of memory-related gene activity in the hippocampus and cortex long after the learning event has terminated. Indeed, molecular events occurring within hours and days of fear conditioning are essential for stabilizing and eventually transitioning the memory to the cortex. It is increasingly evident that molecular mechanisms that exhibit a capacity for prolonged activation may underlie systems consolidation. Processes that have the capacity to control protein abundance over long time scales, such as epigenetic modifications, are prime candidates for the molecular mechanism of systems consolidation. Indeed, recent work has established two types of epigenetic modifications as integral for systems consolidation. First, localized nucleosomal histone variant exchange and histone modifications are integral for early stages of systems consolidation, whereas DNA methylation appears to be utilized to form stable marks that support memory maintenance. Since systems consolidation also requires discrete and time-sensitive changes in protein abundance, additional mechanisms, such as protein degradation, need also be considered, although their role in systems consolidation has yet to be investigated. Here, we discuss the role of molecular mechanisms in systems consolidation and their implications for understanding how memories persist over time.
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Affiliation(s)
- B J Walters
- The Hospital for Sick Children, Department of Neuroscience and Mental Health, Toronto, ON, Canada
| | - I B Zovkic
- University of Toronto Mississauga, Department of Psychology, Mississauga, ON, Canada.
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Borba Filho GL, Zenki KC, Kalinine E, Baggio S, Pettenuzzo L, Zimmer ER, Weis SN, Calcagnotto ME, Onofre de Souza D. A new device for step-down inhibitory avoidance task--effects of low and high frequency in a novel device for passive inhibitory avoidance task that avoids bioimpedance variations. PLoS One 2015; 10:e0116000. [PMID: 25706879 PMCID: PMC4338061 DOI: 10.1371/journal.pone.0116000] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 12/03/2014] [Indexed: 12/28/2022] Open
Abstract
Background Step-down inhibitory avoidance task has been widely used to evaluate aversive memory, but crucial parameters inherent to traditional devices that may influence the behavior analysis (as stimulus frequency, animal’s bioimpedance) are frequently neglected. New Method We developed a new device for step-down inhibitory avoidance task by modifying the shape and distribution of the stainless steel bars in the box floor where the stimuli are applied. The bars are 2mm wide, with rectangular shape, arranged in pairs at intervals of 1cm from the next pairs. Each pair makes an electrical dipole where the polarity inverts after each pulse. This device also presents a component that acquires and records the exact current received by the animal foot and precisely controls the frequency of stimulus applied during the entire experiment. Result Different from conventional devices, this new apparatus increases the contact surface with bars and animal´s paws, allowing the electric current pass through the animal´s paws only, drastically reducing the influence of animal’s bioimpedance. The analysis of recorded data showed that the current received by the animal was practically the same as applied, independent of the animal´s body composition. Importantly, the aversive memory was observed at specific stimuli intensity and frequency (0.35 or 0.5 mA at 62 and 125Hz but not at 0.20 mA or 20 Hz). Moreover, with this device it was possible to observe the well-known step-down inhibitory avoidance task memory impairment induced by guanosine. Conclusion This new device offers a substantial improvement for behavioral analysis in step-down inhibitory avoidance task and allows us to precisely compare data from different animals with distinct body composition.
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Affiliation(s)
- Gilvan Luiz Borba Filho
- Programa de Pós-Graduação em Educação em Ciências, ICBS—Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
- * E-mail:
| | - Kamila Cagliari Zenki
- Programa de Pós-Graduação em Ciências Biológicas-Bioquímica, ICBS—Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Eduardo Kalinine
- Programa de Pós-Graduação em Ciências Biológicas-Bioquímica, ICBS—Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
- Programa de Pós-Graduação em Ciências Fisiológicas—Universidade Federal de Sergipe, São Cristóvão, Sergipe, Brasil
| | - Suelen Baggio
- Programa de Pós-Graduação em Ciências Biológicas-Bioquímica, ICBS—Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Letícia Pettenuzzo
- Programa de Pós-Graduação em Ciências Biológicas-Bioquímica, ICBS—Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Eduardo Rigon Zimmer
- Programa de Pós-Graduação em Ciências Biológicas-Bioquímica, ICBS—Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Simone Nardin Weis
- Programa de Pós-Graduação em Ciências Biológicas-Bioquímica, ICBS—Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Maria Elisa Calcagnotto
- Programa de Pós-Graduação em Ciências Biológicas-Bioquímica, ICBS—Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
- Departamento de Bioquímica, ICBS—Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Diogo Onofre de Souza
- Programa de Pós-Graduação em Educação em Ciências, ICBS—Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
- Programa de Pós-Graduação em Ciências Biológicas-Bioquímica, ICBS—Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
- Departamento de Bioquímica, ICBS—Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
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95
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Transiently increasing cAMP levels selectively in hippocampal excitatory neurons during sleep deprivation prevents memory deficits caused by sleep loss. J Neurosci 2015; 34:15715-21. [PMID: 25411499 DOI: 10.1523/jneurosci.2403-14.2014] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The hippocampus is particularly sensitive to sleep loss. Although previous work has indicated that sleep deprivation impairs hippocampal cAMP signaling, it remains to be determined whether the cognitive deficits associated with sleep deprivation are caused by attenuated cAMP signaling in the hippocampus. Further, it is unclear which cell types are responsible for the memory impairments associated with sleep deprivation. Transgenic approaches lack the spatial resolution to manipulate specific signaling pathways selectively in the hippocampus, while pharmacological strategies are limited in terms of cell-type specificity. Therefore, we used a pharmacogenetic approach based on a virus-mediated expression of a Gαs-coupled Drosophila octopamine receptor selectively in mouse hippocampal excitatory neurons in vivo. With this approach, a systemic injection with the receptor ligand octopamine leads to increased cAMP levels in this specific set of hippocampal neurons. We assessed whether transiently increasing cAMP levels during sleep deprivation prevents memory consolidation deficits associated with sleep loss in an object-location task. Five hours of total sleep deprivation directly following training impaired the formation of object-location memories. Transiently increasing cAMP levels in hippocampal neurons during the course of sleep deprivation prevented these memory consolidation deficits. These findings demonstrate that attenuated cAMP signaling in hippocampal excitatory neurons is a critical component underlying the memory deficits in hippocampus-dependent learning tasks associated with sleep deprivation.
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96
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Abstract
Nicotinic acetylcholine receptors (nAChRs) modulate the neurobiological processes underlying hippocampal learning and memory. In addition, nicotine's ability to desensitize and upregulate certain nAChRs may alter hippocampus-dependent memory processes. Numerous studies have examined the effects of nicotine on hippocampus-dependent learning, as well as the roles of low- and high-affinity nAChRs in mediating nicotine's effects on hippocampus-dependent learning and memory. These studies suggested that while acute nicotine generally acts as a cognitive enhancer for hippocampus-dependent learning, withdrawal from chronic nicotine results in deficits in hippocampus-dependent memory. Furthermore, these studies demonstrated that low- and high-affinity nAChRs functionally differ in their involvement in nicotine's effects on hippocampus-dependent learning. In the present chapter, we reviewed studies using systemic or local injections of acute or chronic nicotine, nAChR subunit agonists or antagonists; genetically modified mice; and molecular biological techniques to characterize the effects of nicotine on hippocampus-dependent learning.
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Affiliation(s)
- Munir Gunes Kutlu
- Temple University, 1701 N. 13th St, Weiss Hall, Philadelphia, PA, 19122, USA
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97
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Hippocampal cAMP/PKA/CREB is required for neuroprotective effect of acupuncture. Physiol Behav 2014; 139:482-90. [PMID: 25481359 DOI: 10.1016/j.physbeh.2014.12.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 11/21/2014] [Accepted: 12/02/2014] [Indexed: 01/18/2023]
Abstract
Acupuncture has beneficial effects in vascular dementia (VaD) patients. The underlying mechanism, however, remains unknown. The present study was designed to investigate whether the cAMP/PKA/CREB cascade is involved in the mechanism of acupuncture in cerebral multi-infarction rats. In this study, cerebral multi-infarction was modeled in adult Wistar rats by homologous blood clot emboli. After a two-week acupuncture treatment at Zusanli (ST36), hippocampal-dependent memory was tested by employing a radial arm maze test. The hippocampus was isolated for analyses of cAMP concentration, phosphodiesterase (PDE) activity and CREB/pCREB and ERK/pERK expressions. The Morris water maze (MWM) task and CREB phosphorylation were evaluated in the presence of PKA-selective peptide inhibitor (H89). The radial arm maze test results demonstrated that acupuncture treatment at ST36 reversed hippocampal-dependent memory in impaired animals. Compared to those of the impaired group, cAMP concentration, PKA activity and pCREB and pERK expressions were increased following acupuncture therapy. Finally, the blockade of PKA reversed the increase in CREB phosphorylation and the improvement in recognitive function induced by acupuncture treatment. These results suggest that acupuncture could improve hippocampus function by modulating the cAMP/PKA/CREB signaling pathway, which represents a molecular mechanism of acupuncture for recognitive function in cerebral multi-infarction rats.
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98
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Barros LA, Tufik S, Andersen ML. The role of progesterone in memory: an overview of three decades. Neurosci Biobehav Rev 2014; 49:193-204. [PMID: 25434881 DOI: 10.1016/j.neubiorev.2014.11.015] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 11/18/2014] [Accepted: 11/20/2014] [Indexed: 12/24/2022]
Abstract
Memory comprises acquisition, consolidation and retrieval of information. Many substances can influence these different phases. It is well demonstrated that sex hormones, mainly estrogen, impact cognitive function. More recently, progesterone has also been documented as playing an important role in cognition, since it influences brain regions involved in memory. Currently, many women are under hormone treatment, which contain progesterone to decrease the risk of development of endometrial cancer. This affords the opportunity to study the real effects of this hormonal replacement on cognition. There are many contradictory results regarding the role of progesterone in memory. Therefore, the aim of this review was to synthesize these studies using the new perspective of the influence of hormone replacement on cognition in women.
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Affiliation(s)
- L A Barros
- Departamento de Psicobiologia, Universidade Federal de São Paulo (UNIFESP), Rua Napoleão de Barros, 925, Vila Clementino, São Paulo, SP, Brazil
| | - S Tufik
- Departamento de Psicobiologia, Universidade Federal de São Paulo (UNIFESP), Rua Napoleão de Barros, 925, Vila Clementino, São Paulo, SP, Brazil
| | - M L Andersen
- Departamento de Psicobiologia, Universidade Federal de São Paulo (UNIFESP), Rua Napoleão de Barros, 925, Vila Clementino, São Paulo, SP, Brazil.
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99
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Zhang J, Tanenhaus AK, Davis JC, Hanlon BM, Yin JCP. Spatio-temporal in vivo recording of dCREB2 dynamics in Drosophila long-term memory processing. Neurobiol Learn Mem 2014; 118:80-8. [PMID: 25460038 DOI: 10.1016/j.nlm.2014.11.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 11/12/2014] [Accepted: 11/12/2014] [Indexed: 11/19/2022]
Abstract
CREB (cAMP response element-binding protein) is an evolutionarily conserved transcription factor, playing key roles in synaptic plasticity, intrinsic excitability and long-term memory (LTM) formation. The Drosophila homologue of mammalian CREB, dCREB2, is also important for LTM. However, the spatio-temporal nature of dCREB2 activity during memory consolidation is poorly understood. Using an in vivo reporter system, we examined dCREB2 activity continuously in specific brain regions during LTM processing. Two brain regions that have been shown to be important for Drosophila LTM are the ellipsoid body (EB) and the mushroom body (MB). We found that dCREB2 reporter activity is persistently elevated in EB R2/R4m neurons, but not neighboring R3/R4d neurons, following LTM-inducing training. In multiple subsets of MB neurons, dCREB2 reporter activity is suppressed immediately following LTM-specific training, and elevated during late windows. In addition, we observed heterogeneous responses across different subsets of neurons in MB αβ lobe during LTM processing. All of these changes suggest that dCREB2 functions in both the EB and MB for LTM formation, and that this activity contributes to the process of systems consolidation.
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Affiliation(s)
- Jiabin Zhang
- Neuroscience Training Program, 1300 University Ave., University of Wisconsin-Madison, Madison, WI 53706, United States; Department of Genetics, 3434 Genetics/Biotechnology, 425 Henry Mall, University of Wisconsin-Madison, Madison, WI 53706, United States.
| | - Anne K Tanenhaus
- Neuroscience Training Program, 1300 University Ave., University of Wisconsin-Madison, Madison, WI 53706, United States; Department of Genetics, 3434 Genetics/Biotechnology, 425 Henry Mall, University of Wisconsin-Madison, Madison, WI 53706, United States.
| | - John C Davis
- Department of Statistics, University of Wisconsin-Madison, Madison, WI 53706, United States.
| | - Bret M Hanlon
- Department of Statistics, University of Wisconsin-Madison, Madison, WI 53706, United States.
| | - Jerry C P Yin
- Department of Genetics, 3434 Genetics/Biotechnology, 425 Henry Mall, University of Wisconsin-Madison, Madison, WI 53706, United States; Department of Neurology, 1685 Highland Ave., University of Wisconsin-Madison, Madison, WI 53706, United States.
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100
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Lim S, Moon M, Oh H, Kim HG, Kim SY, Oh MS. Ginger improves cognitive function via NGF-induced ERK/CREB activation in the hippocampus of the mouse. J Nutr Biochem 2014; 25:1058-65. [PMID: 25049196 DOI: 10.1016/j.jnutbio.2014.05.009] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 04/30/2014] [Accepted: 05/13/2014] [Indexed: 12/27/2022]
Abstract
Ginger (the rhizome of Zingiber officinale Roscoe) has been used worldwide for many centuries in cooking and for treatment of several diseases. The main pharmacological properties of ginger include anti-inflammatory, antihyperglycemic, antiarthritic, antiemetic and neuroprotective actions. Recent studies demonstrated that ginger significantly enhances cognitive function in various cognitive disorders as well as in healthy brain. However, the biochemical mechanisms underlying the ginger-mediated enhancement of cognition have not yet been studied in normal or diseased brain. In the present study, we assessed the memory-enhancing effects of dried ginger extract (GE) in a model of scopolamine-induced memory deficits and in normal animals by performing a novel object recognition test. We found that GE administration significantly improved the ability of mice to recognize novel objects, indicating improvements in learning and memory. Furthermore, to elucidate the mechanisms of GE-mediated cognitive enhancement, we focused on nerve growth factor (NGF)-induced signaling pathways. NGF enzyme-linked immunosorbent assay analysis revealed that GE administration led to elevated NGF levels in both the mouse hippocampus and rat glioma C6 cells. GE administration also resulted in phosphorylation of extracellular-signal-regulated kinase (ERK) and cyclic AMP response element-binding protein (CREB), as revealed by Western blotting analysis. Neutralization of NGF with a specific NGF antibody inhibited GE-triggered activation of ERK and CREB in the hippocampus. Also, GE treatment significantly increased pre- and postsynaptic markers, synaptophysin and PSD-95, which are related to synapse formation in the brain. These data suggest that GE has a synaptogenic effect via NGF-induced ERK/CREB activation, resulting in memory enhancement.
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Affiliation(s)
- Soonmin Lim
- Department of Life and Nanopharmaceutical Science, Graduates school and Kyung Hee East-West Pharmaceutical Research Institute, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Minho Moon
- School of Medicine, Kyung Hee University, #1 Hoegi-dong, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Hyein Oh
- Department of Life and Nanopharmaceutical Science, Graduates school and Kyung Hee East-West Pharmaceutical Research Institute, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Hyo Geun Kim
- Department of Life and Nanopharmaceutical Science, Graduates school and Kyung Hee East-West Pharmaceutical Research Institute, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Sun Yeou Kim
- College of Pharmacy, Gachon University, 191, Hambangmoe-ro, Yeonsu-gu, Incheon 406-799, Republic of Korea
| | - Myung Sook Oh
- Department of Life and Nanopharmaceutical Science, Graduates school and Kyung Hee East-West Pharmaceutical Research Institute, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea; Department of Oriental Pharmaceutical Science, College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea.
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