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Alexander AS. Spatial navigation: A touch in the dark. Curr Biol 2023; 33:R1195-R1197. [PMID: 37989098 DOI: 10.1016/j.cub.2023.10.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
New work reveals whisker landmark coding in the retrosplenial cortex of mice, broadening our understanding of multisensory spatial cognition, contextual processing, and spatial predictive coding.
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Affiliation(s)
- Andrew S Alexander
- Department of Psychological and Brain Sciences, University of California, Santa Barbara, Santa Barbara, CA 93106, USA.
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2
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Nygaard KR, Maloney SE, Swift RG, McCullough KB, Wagner RE, Fass SB, Garbett K, Mirnics K, Veenstra‐VanderWeele J, Dougherty JD. Extensive characterization of a Williams syndrome murine model shows Gtf2ird1-mediated rescue of select sensorimotor tasks, but no effect on enhanced social behavior. GENES, BRAIN, AND BEHAVIOR 2023; 22:e12853. [PMID: 37370259 PMCID: PMC10393419 DOI: 10.1111/gbb.12853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 05/25/2023] [Accepted: 06/15/2023] [Indexed: 06/29/2023]
Abstract
Williams syndrome is a rare neurodevelopmental disorder exhibiting cognitive and behavioral abnormalities, including increased social motivation, risk of anxiety and specific phobias along with perturbed motor function. Williams syndrome is caused by a microdeletion of 26-28 genes on chromosome 7, including GTF2IRD1, which encodes a transcription factor suggested to play a role in the behavioral profile of Williams syndrome. Duplications of the full region also lead to frequent autism diagnosis, social phobias and language delay. Thus, genes in the region appear to regulate social motivation in a dose-sensitive manner. A "complete deletion" mouse, heterozygously eliminating the syntenic Williams syndrome region, has been deeply characterized for cardiac phenotypes, but direct measures of social motivation have not been assessed. Furthermore, the role of Gtf2ird1 in these behaviors has not been addressed in a relevant genetic context. Here, we have generated a mouse overexpressing Gtf2ird1, which can be used both to model duplication of this gene alone and to rescue Gtf2ird1 expression in the complete deletion mice. Using a comprehensive behavioral pipeline and direct measures of social motivation, we provide evidence that the Williams syndrome critical region regulates social motivation along with motor and anxiety phenotypes, but that Gtf2ird1 complementation is not sufficient to rescue most of these traits, and duplication does not decrease social motivation. However, Gtf2ird1 complementation does rescue light-aversive behavior and performance on select sensorimotor tasks, perhaps indicating a role for this gene in sensory processing or integration.
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Affiliation(s)
- Kayla R. Nygaard
- Department of GeneticsWashington University School of MedicineSt. LouisMissouriUSA
- Department of PsychiatryWashington University School of MedicineSt. LouisMissouriUSA
| | - Susan E. Maloney
- Department of PsychiatryWashington University School of MedicineSt. LouisMissouriUSA
- Intellectual & Developmental Disabilities Research CenterWashington University School of MedicineSt. LouisMissouriUSA
| | - Raylynn G. Swift
- Department of GeneticsWashington University School of MedicineSt. LouisMissouriUSA
- Department of PsychiatryWashington University School of MedicineSt. LouisMissouriUSA
| | - Katherine B. McCullough
- Department of GeneticsWashington University School of MedicineSt. LouisMissouriUSA
- Department of PsychiatryWashington University School of MedicineSt. LouisMissouriUSA
| | - Rachael E. Wagner
- Department of PsychiatryWashington University School of MedicineSt. LouisMissouriUSA
| | - Stuart B. Fass
- Department of GeneticsWashington University School of MedicineSt. LouisMissouriUSA
- Department of PsychiatryWashington University School of MedicineSt. LouisMissouriUSA
| | | | - Karoly Mirnics
- Psychiatry, Biochemistry & Molecular Biology, Pharmacology & Experimental Neuroscience, Munroe‐Meyer Institute for Genetics and RehabilitationUniversity of Nebraska Medical CenterOmahaNebraskaUSA
| | - Jeremy Veenstra‐VanderWeele
- Departments of Psychiatry and PediatricsColumbia University, New York State Psychiatric Institute, and Center for Autism and the Developing Brain, New York‐Presbyterian HospitalNew York CityNew YorkUSA
| | - Joseph D. Dougherty
- Department of GeneticsWashington University School of MedicineSt. LouisMissouriUSA
- Department of PsychiatryWashington University School of MedicineSt. LouisMissouriUSA
- Intellectual & Developmental Disabilities Research CenterWashington University School of MedicineSt. LouisMissouriUSA
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3
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Ni L, Chen H, Xu X, Sun D, Cai H, Wang L, Tang Q, Hao Y, Cao S, Hu X. Neurocircuitry underlying the antidepressant effect of retrograde facial botulinum toxin in mice. Cell Biosci 2023; 13:30. [PMID: 36782335 PMCID: PMC9926702 DOI: 10.1186/s13578-023-00964-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 01/16/2023] [Indexed: 02/15/2023] Open
Abstract
BACKGROUNDS Botulinum toxin type A (BoNT/A) is extensively applied in spasticity and dystonia as it cleaves synaptosome-associated protein 25 (SNAP25) in the presynaptic terminals, thereby inhibiting neurotransmission. An increasing number of randomized clinical trials have suggested that glabellar BoNT/A injection improves depressive symptoms in patients with major depressive disorder (MDD). However, the underlying neuronal circuitry of BoNT/A-regulated depression remains largely uncharacterized. RESULTS Here, we modeled MDD using mice subjected to chronic restraint stress (CRS). By pre-injecting BoNT/A into the unilateral whisker intrinsic musculature (WIM), and performing behavioral testing, we showed that pre-injection of BoNT/A attenuated despair- and anhedonia-like phenotypes in CRS mice. By applying immunostaining of BoNT/A-cleaved SNAP25 (cl.SNAP25197), subcellular spatial localization of SNAP25 with markers of cholinergic neurons (ChAT) and post-synaptic membrane (PSD95), and injection of monosynaptic retrograde tracer CTB-488-mixed BoNT/A to label the primary nucleus of the WIM, we demonstrated that BoNT/A axonal retrograde transported to the soma of whisker-innervating facial motoneurons (wFMNs) and subsequent transcytosis to synaptic terminals of second-order neurons induced central effects. Furthermore, using transsynaptic retrograde and monosynaptic antegrade viral neural circuit tracing with c-Fos brain mapping and co-staining of neural markers, we observed that the CRS-induced expression of c-Fos and CaMKII double-positive neurons in the ventrolateral periaqueductal grey (vlPAG), which sent afferents to wFMNs, was down-regulated 3 weeks after BoNT/A facial pre-administration. Strikingly, the repeated and targeted silencing of the wFMNs-projecting CaMKII-positive neurons in vlPAG with a chemogenetic approach via stereotactic injection of recombinant adeno-associated virus into specific brain regions of CRS mice mimicked the antidepressant-like action of BoNT/A pre-treatment. Conversely, repeated chemogenetic activation of this potential subpopulation counteracted the BoNT/A-improved significant antidepressant behavior. CONCLUSION We reported for the first time that BoNT/A inhibited the wFMNs-projecting vlPAG excitatory neurons through axonal retrograde transport and cell-to-cell transcytosis from the injected location of the WIM to regulate depressive-like phenotypes of CRS mice. For the limited and the reversibility of side effects, BoNT/A has substantial advantages and potential application in MDD.
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Affiliation(s)
- Linhui Ni
- grid.13402.340000 0004 1759 700XDepartment of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310053 China
| | - Hanze Chen
- grid.13402.340000 0004 1759 700XDepartment of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310053 China
| | - Xinxin Xu
- grid.13402.340000 0004 1759 700XDepartment of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310053 China ,grid.13402.340000 0004 1759 700XDepartment of Ultrasonography, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310053 China
| | - Di Sun
- grid.13402.340000 0004 1759 700XDepartment of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310053 China
| | - Huaying Cai
- grid.13402.340000 0004 1759 700XDepartment of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310053 China
| | - Li Wang
- grid.13402.340000 0004 1759 700XDepartment of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310053 China
| | - Qiwen Tang
- grid.13402.340000 0004 1759 700XDepartment of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310053 China
| | - Yonggang Hao
- grid.13402.340000 0004 1759 700XDepartment of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310053 China ,grid.263761.70000 0001 0198 0694Department of Neurology, Dushu Lake Hospital Affiliated to Soochow University, Suzhou, 215125 China
| | - Shuxia Cao
- Department of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310053, China.
| | - Xingyue Hu
- Department of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310053, China.
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Nygaard KR, Maloney SE, Swift RG, McCullough KB, Wagner RE, Fass SB, Garbett K, Mirnics K, Veenstra-VanderWeele J, Dougherty JD. Extensive characterization of a Williams Syndrome murine model shows Gtf2ird1 -mediated rescue of select sensorimotor tasks, but no effect on enhanced social behavior. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.18.523029. [PMID: 36711815 PMCID: PMC9882309 DOI: 10.1101/2023.01.18.523029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Williams Syndrome is a rare neurodevelopmental disorder exhibiting cognitive and behavioral abnormalities, including increased social motivation, risk of anxiety and specific phobias along with perturbed motor function. Williams Syndrome is caused by a microdeletion of 26-28 genes on chromosome 7, including GTF2IRD1 , which encodes a transcription factor suggested to play a role in the behavioral profile of Williams Syndrome. Duplications of the full region also lead to frequent autism diagnosis, social phobias, and language delay. Thus, genes in the region appear to regulate social motivation in a dose-sensitive manner. A 'Complete Deletion' mouse, heterozygously eliminating the syntenic Williams Syndrome region, has been deeply characterized for cardiac phenotypes, but direct measures of social motivation have not been assessed. Furthermore, the role of Gtf2ird1 in these behaviors has not been addressed in a relevant genetic context. Here, we have generated a mouse overexpressing Gtf2ird1 , which can be used both to model duplication of this gene alone and to rescue Gtf2ird1 expression in the Complete Deletion mice. Using a comprehensive behavioral pipeline and direct measures of social motivation, we provide evidence that the Williams Syndrome Critical Region regulates social motivation along with motor and anxiety phenotypes, but that Gtf2ird1 complementation is not sufficient to rescue most of these traits, and duplication does not decrease social motivation. However, Gtf2ird1 complementation does rescue light-aversive behavior and performance on select sensorimotor tasks, perhaps indicating a role for this gene in sensory processing or integration.
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Affiliation(s)
- Kayla R. Nygaard
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA,Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Susan E. Maloney
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA,Intellectual & Developmental Disabilities Research Center, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Raylynn G. Swift
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA,Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Katherine B. McCullough
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA,Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Rachael E. Wagner
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Stuart B. Fass
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA,Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA
| | | | - Karoly Mirnics
- Psychiatry, Biochemistry & Molecular Biology, Pharmacology & Experimental Neuroscience, Munroe-Meyer Institute for Genetics and Rehabilitation, University of Nebraska Medical Center Omaha, NE 68198-5450
| | - Jeremy Veenstra-VanderWeele
- Departments of Psychiatry and Pediatrics, Columbia University; New York State Psychiatric Institute; and Center for Autism and the Developing Brain, New York-Presbyterian Hospital
| | - Joseph D. Dougherty
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA,Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA
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Murasawa H, Soumiya H, Kobayashi H, Imai J, Nagase T, Fukumitsu H. Neonatal bilateral whisker trimming in male mice age-dependently alters brain neurotransmitter levels and causes adolescent onsets of social behavior abnormalities. Biomed Res 2023; 44:147-160. [PMID: 37544736 DOI: 10.2220/biomedres.44.147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Tactile perception via whiskers is important in rodent behavior. Whisker trimming during the neonatal period affects mouse behaviors related to both whisker-based tactile cognition and social performance. However, the molecular basis of these phenomena is not completely understood. To solve this issue, we investigated developmental changes in transmitters and metabolites in various brain regions of male mice subjected to bilateral whisker trimming during the neonatal period (10 days after birth [BWT10 mice]). We discovered significantly lower levels of 3-methoxy-4-hydroxyphenyl glycol (MHPG), the major noradrenaline metabolite, in various brain regions of male BWT10 mice at both early/late adolescent stages (at P4W and P8W). However, reduced levels of dopamine (DA) and their metabolites were more significantly identified at P8W in the nuclear origins of monoamine (midbrain and medulla oblongata) and the limbic system (frontal cortex, amygdala, and hippocampus) than at P4W. Furthermore, the onset of social behavior deficits (P6W) was observed later to the impairment of whisker-based tactile cognitive behaviors (P4W). Taken together, these findings suggest that whisker-mediated tactile cognition may contribute toprogressive abnormalities in social behaviors in BWT10 mice accompanied by impaired development of dopaminergic systems.
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Affiliation(s)
- Hiroyasu Murasawa
- Laboratory of Molecular Biology, Department of Biofunctional Analysis, Gifu Pharmaceutical University
- Hashima Laboratory, Nihon Bioresearch Inc
| | - Hitomi Soumiya
- Laboratory of Molecular Biology, Department of Biofunctional Analysis, Gifu Pharmaceutical University
| | - Hiroyuki Kobayashi
- Laboratory of Molecular Biology, Department of Biofunctional Analysis, Gifu Pharmaceutical University
- Hashima Laboratory, Nihon Bioresearch Inc
| | - Jun Imai
- Hashima Laboratory, Nihon Bioresearch Inc
| | | | - Hidefumi Fukumitsu
- Laboratory of Molecular Biology, Department of Biofunctional Analysis, Gifu Pharmaceutical University
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Long-lasting Postnatal Sensory Deprivation Alters Dendritic Morphology of Pyramidal Neurons in the Rat Hippocampus: Behavioral Correlates. Neuroscience 2022; 480:79-96. [PMID: 34785272 DOI: 10.1016/j.neuroscience.2021.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 11/04/2021] [Accepted: 11/05/2021] [Indexed: 11/20/2022]
Abstract
The role of normal sensory inputs in the development of sensory cortices is well known, however, their impacts on the hippocampus, an integrator of sensory modalities with important roles in cognitive functions, has received much less attention. Here, we applied a long-term sensory deprivation paradigm by trimming the rats' whiskers bilaterally, from postnatal day 3 to 59. Female sensory-deprived (SD) rats showed more on-wall rearing and visits to the center of the open-field box, shorter periods of grooming, less defecation and less anxiety-like behaviors in the elevated plus-maze compared to controls, who had their intact whiskers brushed. Passive avoidance memory retention was sex-dependently impaired in the female SD rats. In the radial arm maze, however, reference spatial memory was impaired only in the male SD rats. Nonetheless, working memory errors increased in both sexes of SD rats. Besides depletion of CA1 and CA3 pyramidal neurons in SD rats, Sholl analysis of Golgi-Cox stained neurons revealed that prolonged sensory deprivation has retracted the arborization of CA1 basal dendrites in SD group, while solely female SD rats had diminished CA1 apical dendrites. Sholl analysis of CA3 neurons in SD animals also disclosed significantly more branched apical dendrites in males and basal dendrites in females. Sensory deprivation also led to a considerable spine loss and variation of different spine types in a sex-dependent manner. Our findings suggest that experience-dependent structural plasticity is capable of spreading far beyond the manipulated sensory zones and the inevitable functional alterations can be expressed in a multifactorial sex-dependent manner.
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Multidimensional nature of dominant behavior: Insights from behavioral neuroscience. Neurosci Biobehav Rev 2021; 132:603-620. [PMID: 34902440 DOI: 10.1016/j.neubiorev.2021.12.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 10/29/2021] [Accepted: 12/09/2021] [Indexed: 12/17/2022]
Abstract
Social interactions for many species of animals are critical for survival, wellbeing, and reproduction. Optimal navigation of a social system increases chances for survival and reproduction, therefore there is strong incentive to fit into social structures. Social animals rely heavily on dominant-submissive behaviors in establishment of stable social hierarchies. There is a link between extreme manifestation of dominance/submissiveness and behavioral deviations. To understand neural substrates affiliated with a specific hierarchical rank, there is a real need for reliable animal behavioral models. Different paradigms have been consolidated over time to study the neurobiology of social rank behavior in a standardized manner using rodent models to unravel the neural pathways and substrates involved in normal and abnormal intraspecific social interactions. This review summarizes and discusses the commonly used behavioral tests and new directions for the assessment of dominance in rodents. We discuss the hierarchy inheritable nature and other critical issues regarding hierarchical rank manifestation which may help in designing social-rank-related studies that serve as promising pre-clinical tools in behavioral psychiatry.
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Habedank A, Kahnau P, Lewejohann L. Alternate without alternative: neither preference nor learning explains behaviour of C57BL/6J mice in the T-maze. BEHAVIOUR 2021. [DOI: 10.1163/1568539x-bja10085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
In rodents, the T-maze is commonly used to investigate spontaneous alternating behaviour, but it can also be used to investigate preference between goods. However, for T-maze preference tests with mice there is no recommended protocol and researchers frequently report reproduction difficulties. Here, we tried to develop an efficient protocol with female C57BL/6J CrL mice for preference tests. We used two different designs, adapting habituation, cues and trial timing. However, in both experiments mice did not show any preference, although we used goods which we knew mice find rewarding. Instead, they alternated choices indicating that exploratory behaviour overruled preference. We argue that this behavioural strategy has evolved as an adaptive trait in saturated conditions where there is no need to take the reward immediately. Therefore, we deem the T-maze unsuitable for preference testing with the procedures we used here.
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Affiliation(s)
- Anne Habedank
- German Federal Institute for Risk Assessment (BfR), German Center for the Protection of Laboratory Animals (Bf3R), Max-Dohrn-Straße 8–10, D-10589 Berlin, Germany
| | - Pia Kahnau
- German Federal Institute for Risk Assessment (BfR), German Center for the Protection of Laboratory Animals (Bf3R), Max-Dohrn-Straße 8–10, D-10589 Berlin, Germany
| | - Lars Lewejohann
- German Federal Institute for Risk Assessment (BfR), German Center for the Protection of Laboratory Animals (Bf3R), Max-Dohrn-Straße 8–10, D-10589 Berlin, Germany
- Institute of Animal Welfare, Animal Behavior and Laboratory Animal Science, Freie Universität Berlin, Königsweg 67, D-14163 Berlin, Germany
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Arakawa H. From Multisensory Assessment to Functional Interpretation of Social Behavioral Phenotype in Transgenic Mouse Models for Autism Spectrum Disorders. Front Psychiatry 2020; 11:592408. [PMID: 33329141 PMCID: PMC7717939 DOI: 10.3389/fpsyt.2020.592408] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 10/19/2020] [Indexed: 12/13/2022] Open
Abstract
Autism spectrum disorder (ASD) is a common heterogeneous disorder, defined solely by the core behavioral characteristics, including impaired social interaction and restricted and repeated behavior. Although an increasing number of studies have been performed extensively, the neurobiological mechanisms underlying the core symptoms of ASD remain largely unknown. Transgenic mouse models provide a useful tool for evaluating genetic and neuronal mechanisms underlying ASD pathology, which are prerequisites for validating behavioral phenotypes that mimic the core symptoms of human ASD. The purpose of this review is to propose a better strategy for analyzing and interpreting social investigatory behaviors in transgenic mouse models of ASD. Mice are nocturnal, and employ multimodal processing mechanisms for social communicative behaviors, including those that involve olfactory and tactile senses. Most behavioral paradigms that have been developed for measuring a particular ASD-like behavior in mouse models, such as social recognition, preference, and discrimination tests, are based on the evaluation of distance-based investigatory behavior in response to social stimuli. This investigatory behavior in mice is regulated by multimodal processing involving with two different motives: first, an olfactory-based novelty assessment, and second, tactile-based social contact, in a temporally sequential manner. Accurate interpretation of investigatory behavior exhibited by test mice can be achieved by functional analysis of these multimodal, sequential behaviors, which will lead to a better understanding of the specific features of social deficits associated with ASD in transgenic mouse models, at high temporal and spatial resolutions.
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Early-stage dysfunction of hippocampal theta and gamma oscillations and its modulation of neural network in a transgenic 5xFAD mouse model. Neurobiol Aging 2020; 94:121-129. [PMID: 32619873 DOI: 10.1016/j.neurobiolaging.2020.05.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 04/20/2020] [Accepted: 05/03/2020] [Indexed: 12/24/2022]
Abstract
Alzheimer's disease (AD) is pathologically characterized by amyloid-β (Aβ) accumulation, which induces Aβ-dependent neuronal dysfunctions. We focused on the early-stage disease progression and examined the neuronal network functioning in the 5xFAD mice. The simultaneous intracranial recordings were obtained from the hippocampal perforant path (PP) and the dentate gyrus (DG). Concomitant to Aβ accumulation, theta power was strongly attenuated in the PP and DG regions of 5xFAD mice compared to those in nontransgenic littermates. For either theta rhythm or gamma oscillation, the phase synchronization on the PP-DG pathway was impaired, evidenced by decreased phase locking value and diminished coherency index. To alleviate the neural oscillatory deficits in early-stage AD, a neural modulation approach (rTMS) was used to activate gamma oscillations and strengthen the synchronicity of neuronal activity on the PP-DG pathway. In brief, there was a significant neuronal network dysfunction at an early-stage AD-like pathology, which preceded the onset of cognitive deficits and was likely driven by Aβ accumulation, suggesting that the neural oscillation analysis played an important role in early AD diagnosis.
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Zhai B, Fu J, Xiang S, Shang Y, Yan Y, Yin T, Zhang T. Repetitive transcranial magnetic stimulation ameliorates recognition memory impairment induced by hindlimb unloading in mice associated with BDNF/TrkB signaling. Neurosci Res 2020; 153:40-47. [DOI: 10.1016/j.neures.2019.04.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 02/18/2019] [Accepted: 04/08/2019] [Indexed: 02/07/2023]
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12
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Watson LS, Stone TD, Williams D, Williams AS, Sims-Robinson C. High-Fat Diet Impairs Tactile Discrimination Memory in the Mouse. Behav Brain Res 2020; 382:112454. [PMID: 31926214 PMCID: PMC7129774 DOI: 10.1016/j.bbr.2019.112454] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 12/09/2019] [Accepted: 12/25/2019] [Indexed: 12/13/2022]
Abstract
Research on the impact of diet and memory has garnered considerable attention while exploring the link between obesity and cognitive impairment. High-fat diet (HFD) rodent models recapitulate the obesity phenotype and subsequent cognitive impairments. While it is known that HFD is associated with sensory impairment, little attention has been given to the potential role these sensory deficits may play in recognition memory testing, one of the most commonly used cognitive tests. Because mice utilize their facial whiskers as their primary sensory apparatus, we modified a common recognition test, the novel object recognition task, by replacing objects with sandpaper grits at ground level, herein referred to as the novel tactile recognition task (NTR). First, we tested whisker-manipulated mice in this task to determine its reliance on intact whiskers. Then, we tested the HFD mouse in the NTR. Finally, to ensure that deficits in the NTR are due to cognitive impairment and not HFD-induced sensory deficiencies, we tested the whisker sensitivity of HFD mice via the corner test. Our results indicate that the NTR is a whisker dependent task, and that HFD mice exhibit tactile recognition memory impairment, not accompanied by whisker sensory deficits.
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Affiliation(s)
- Luke S Watson
- Department of Neurology, Medical University of South Carolina, Charleston, South Carolina, 29425 USA; Molecular and Cellular Biology and Pathobiology Program, Medical University of South Carolina, Charleston, South Carolina, 29425 USA
| | - Tyler D Stone
- Department of Neurology, Medical University of South Carolina, Charleston, South Carolina, 29425 USA; Honors College, College of Charleston, Charleston, South Carolina, 29424 USA
| | - Dominique Williams
- Department of Neurology, Medical University of South Carolina, Charleston, South Carolina, 29425 USA
| | - Alexus S Williams
- Department of Neurology, Medical University of South Carolina, Charleston, South Carolina, 29425 USA
| | - Catrina Sims-Robinson
- Department of Neurology, Medical University of South Carolina, Charleston, South Carolina, 29425 USA; Molecular and Cellular Biology and Pathobiology Program, Medical University of South Carolina, Charleston, South Carolina, 29425 USA.
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