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Hwang HM, Yamashita S, Matsumoto Y, Ito M, Edwards A, Sasaki J, Dutta DJ, Mohammad S, Yamashita C, Wetherill L, Schwantes-An TH, Abreu M, Mahnke AH, Mattson SN, Foroud T, Miranda RC, Chambers C, Torii M, Hashimoto-Torii K. Reduction of APOE accounts for neurobehavioral deficits in fetal alcohol spectrum disorders. Mol Psychiatry 2024:10.1038/s41380-024-02586-6. [PMID: 38734844 DOI: 10.1038/s41380-024-02586-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 04/20/2024] [Accepted: 04/25/2024] [Indexed: 05/13/2024]
Abstract
A hallmark of fetal alcohol spectrum disorders (FASD) is neurobehavioral deficits that still do not have effective treatment. Here, we present that reduction of Apolipoprotein E (APOE) is critically involved in neurobehavioral deficits in FASD. We show that prenatal alcohol exposure (PAE) changes chromatin accessibility of Apoe locus, and causes reduction of APOE levels in both the brain and peripheral blood in postnatal mice. Of note, postnatal administration of an APOE receptor agonist (APOE-RA) mitigates motor learning deficits and anxiety in those mice. Several molecular and electrophysiological properties essential for learning, which are altered by PAE, are restored by APOE-RA. Our human genome-wide association study further reveals that the interaction of PAE and a single nucleotide polymorphism in the APOE enhancer which chromatin is closed by PAE in mice is associated with lower scores in the delayed matching-to-sample task in children. APOE in the plasma is also reduced in PAE children, and the reduced level is associated with their lower cognitive performance. These findings suggest that controlling the APOE level can serve as an effective treatment for neurobehavioral deficits in FASD.
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Affiliation(s)
- Hye M Hwang
- Center for Neuroscience Research, The Children's Research Institute, Children's National Hospital, Washington, DC, USA
| | - Satoshi Yamashita
- Center for Neuroscience Research, The Children's Research Institute, Children's National Hospital, Washington, DC, USA
| | - Yu Matsumoto
- Center for Neuroscience Research, The Children's Research Institute, Children's National Hospital, Washington, DC, USA
| | - Mariko Ito
- Center for Neuroscience Research, The Children's Research Institute, Children's National Hospital, Washington, DC, USA
- Department of Diabetes, Endocrinology and Metabolism, Tokyo Medical University, Tokyo, Japan
| | - Alex Edwards
- Center for Neuroscience Research, The Children's Research Institute, Children's National Hospital, Washington, DC, USA
| | - Junko Sasaki
- Center for Neuroscience Research, The Children's Research Institute, Children's National Hospital, Washington, DC, USA
- Department of Diabetes, Endocrinology and Metabolism, Tokyo Medical University, Tokyo, Japan
| | - Dipankar J Dutta
- Center for Neuroscience Research, The Children's Research Institute, Children's National Hospital, Washington, DC, USA
| | - Shahid Mohammad
- Center for Neuroscience Research, The Children's Research Institute, Children's National Hospital, Washington, DC, USA
| | - Chiho Yamashita
- Center for Neuroscience Research, The Children's Research Institute, Children's National Hospital, Washington, DC, USA
| | - Leah Wetherill
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Tae-Hwi Schwantes-An
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Marco Abreu
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Amanda H Mahnke
- Department of Neuroscience and Experimental Therapeutics, Texas A&M University School of Medicine, Bryan, TX, USA
| | - Sarah N Mattson
- Center for Behavioral Teratology, San Diego State University, San Diego, CA, USA
| | - Tatiana Foroud
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Rajesh C Miranda
- Department of Neuroscience and Experimental Therapeutics, Texas A&M University School of Medicine, Bryan, TX, USA
| | - Christina Chambers
- Department of Pediatrics, University of California San Diego, San Diego, CA, USA
| | - Masaaki Torii
- Center for Neuroscience Research, The Children's Research Institute, Children's National Hospital, Washington, DC, USA.
- Departments of Pediatrics, and Pharmacology & Physiology, School of Medicine and Health Sciences, The George Washington University, Washington, DC, USA.
| | - Kazue Hashimoto-Torii
- Center for Neuroscience Research, The Children's Research Institute, Children's National Hospital, Washington, DC, USA.
- Departments of Pediatrics, and Pharmacology & Physiology, School of Medicine and Health Sciences, The George Washington University, Washington, DC, USA.
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Zhang M, Luo Y, Wang J, Sun Y, Xie B, Zhang L, Cong B, Ma C, Wen D. Roles of nucleus accumbens shell small-conductance calcium-activated potassium channels in the conditioned fear freezing. J Psychiatr Res 2023; 163:180-194. [PMID: 37216772 DOI: 10.1016/j.jpsychires.2023.05.057] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 04/27/2023] [Accepted: 05/15/2023] [Indexed: 05/24/2023]
Abstract
BACKGROUND Posttraumatic stress disorder (PTSD), a psychiatric disorder caused by stressful events, is characterized by long-lasting fear memory. The nucleus accumbens shell (NAcS) is a key brain region that regulates fear-associated behavior. Small-conductance calcium-activated potassium channels (SK channels) play a key role in regulating the excitability of NAcS medium spiny neurons (MSNs) but their mechanisms of action in fear freezing are unclear. METHOD We established an animal model of traumatic memory using conditioned fear freezing paradigm, and investigated the alterations in SK channels of NAc MSNs subsequent to fear conditioning in mice. We then utilized an adeno-associated virus (AAV) transfection system to overexpress the SK3 subunit and explore the function of the NAcS MSNs SK3 channel in conditioned fear freezing. RESULTS Fear conditioning activated NAcS MSNs with enhanced excitability and reduced the SK channel-mediated medium after-hyperpolarization (mAHP) amplitude. The expression of NAcS SK3 were also reduced time-dependently. The overexpression of NAcS SK3 impaired conditioned fear consolidation without affecting conditioned fear expression, and blocked fear conditioning-induced alterations in NAcS MSNs excitability and mAHP amplitude. Additionally, the amplitudes of mEPSC, AMPAR/NMDAR ratio, and membrane surface GluA1/A2 expression in NAcS MSNs was increased by fear conditioning and returned to normal levels upon SK3 overexpression, indicating that fear conditioning-induced decrease of SK3 expression caused postsynaptic excitation by facilitating AMPAR transmission to the membrane. CONCLUSION These findings show that the NAcS MSNs SK3 channel plays a critical role in conditioned fear consolidation and that it may influence PTSD pathogenesis, making it a potential therapeutic target against PTSD.
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Affiliation(s)
- Minglong Zhang
- College of Forensic Medicine, Hebei Medical University, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Hebei Province, Shijiazhuang, 050017, PR China
| | - Yixiao Luo
- Hunan Province People's Hospital, The First-Affiliated Hospital of Hunan Normal University, Changsha, 410081, PR China
| | - Jian Wang
- College of Forensic Medicine, Hebei Medical University, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Hebei Province, Shijiazhuang, 050017, PR China
| | - Yufei Sun
- College of Forensic Medicine, Hebei Medical University, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Hebei Province, Shijiazhuang, 050017, PR China
| | - Bing Xie
- College of Forensic Medicine, Hebei Medical University, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Hebei Province, Shijiazhuang, 050017, PR China
| | - Ludi Zhang
- College of Forensic Medicine, Hebei Medical University, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Hebei Province, Shijiazhuang, 050017, PR China
| | - Bin Cong
- College of Forensic Medicine, Hebei Medical University, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Hebei Province, Shijiazhuang, 050017, PR China
| | - Chunling Ma
- College of Forensic Medicine, Hebei Medical University, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Hebei Province, Shijiazhuang, 050017, PR China.
| | - Di Wen
- College of Forensic Medicine, Hebei Medical University, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Hebei Province, Shijiazhuang, 050017, PR China.
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Ishola AO, Adetunji AE, Abanum IC, Adeyemi AA, Faleye CK, Martins JB, Ogbe NC, Ogundipe TC, Okewulonu KE, Okon UE, Ovbude DI, Akele RY, Omotade NT, Ajao MS. Datumetine Preferentially Upregulates N-methyl-D-aspartate Receptor Signalling Pathways in Different Brain Regions of Mice. Basic Clin Neurosci 2023; 14:103-116. [PMID: 37346877 PMCID: PMC10279986 DOI: 10.32598/bcn.2021.3397.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/15/2021] [Accepted: 06/30/2021] [Indexed: 06/23/2023] Open
Abstract
Introduction We previously reported that datumetine possesses binding affinity with N-methyl-D-aspartate receptor (NMDAR) and that 14-day exposure to datumetine altered NMDAR signaling by mimicking glutamate toxicity. Here, we investigated the potential neuroprotective effect of a single shot of a low dose of datumetine administration in BALB/c mice. Methods 30 male adult BALB/c mice were used for the study. The mice were randomly divided into three groups of ten mice each with an intraperitoneal injection of 0.1 mL of 10% DMSO for the Vehicle group, Datumetine group were administered 0.1 mg/kg body weight (bw) of datumetine and MK-801+Datumetine group were administered 0.5 mg/kg bw of MK-801 (to block NMDAR) followed by 0.1 mg/kg bw of datumetine after 30 minutes. 24 hours after administration, mice were euthanized in an isoflurane chamber followed by perfusion with 1X PBS. Brains were excised and stored at -20°C till further processing. Mice designated for IHC were further perfused with 4% PFA and brain excised and stored in 4% PFA till further processing. NMDAR signalling molecules expression was evaluated in frozen brain samples and the fixed brain samples were stained for neuron, vGlut and NMDAR subtypes. Results Relative to vehicle (Veh), datumetine downregulate calcium calmodulin kinase II alpha (CamKIIα) expression in the hippocampus and prefrontal cortex (PFC) but not in the cerebellum, cyclic AMP response element binding protein (CREB) was also upregulated only in the PFC but phosphorylated CREB (pCREB) was also upregulated in three brain regions observed, while brain-derived neurotrophic factor (BDNF) was only upregulated in hippocampus and PFC of Datumetine relative to vehicle (Veh). On the other hand, dizocilpine (MK-801) reversed some of the effects of datumetine in the observed brain regions. No major histological alterations were observed in the different brain regions immunohistochemically. Conclusion We conclude that a low dose of datumetine moderately enhances NMDAR activity. This showed the neuroprotective potentials of low datumetine exposure.
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Affiliation(s)
- Azeez Olakunle Ishola
- Department of Anatomy, College of Medicine and Health Sciences, Afe Babalola University Ado-Ekiti, Nigeria
| | - Adedeji Enitan Adetunji
- Department of Anatomy, College of Medicine and Health Sciences, Afe Babalola University Ado-Ekiti, Nigeria
| | - Isaac Chukwunwike Abanum
- Department of Anatomy, College of Medicine and Health Sciences, Afe Babalola University Ado-Ekiti, Nigeria
| | - Adesola Akorede Adeyemi
- Department of Anatomy, College of Medicine and Health Sciences, Afe Babalola University Ado-Ekiti, Nigeria
| | - Caleb Kenechukwu Faleye
- Department of Anatomy, College of Medicine and Health Sciences, Afe Babalola University Ado-Ekiti, Nigeria
| | - Jane Babale Martins
- Department of Anatomy, College of Medicine and Health Sciences, Afe Babalola University Ado-Ekiti, Nigeria
| | - Nnenna Chimdalu Ogbe
- Department of Anatomy, College of Medicine and Health Sciences, Afe Babalola University Ado-Ekiti, Nigeria
| | | | - Karen Ezichi Okewulonu
- Department of Anatomy, College of Medicine and Health Sciences, Afe Babalola University Ado-Ekiti, Nigeria
| | - Umo Emmanuel Okon
- Department of Anatomy, College of Medicine and Health Sciences, Afe Babalola University Ado-Ekiti, Nigeria
| | - Deborah Irenoise Ovbude
- Department of Anatomy, College of Medicine and Health Sciences, Afe Babalola University Ado-Ekiti, Nigeria
| | - Richard Yomi Akele
- Department of Medical Laboratory Science, College of Medicine and Health Sciences, Afe Babalola University, Ado-Ekiti, Nigeria
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Chen WX, Liu B, Zhou L, Xiong X, Fu J, Huang ZF, Tan T, Tang M, Wang J, Tang YP. De novo mutations within metabolism networks of amino acid/protein/energy in Chinese autistic children with intellectual disability. Hum Genomics 2022; 16:52. [PMID: 36320054 PMCID: PMC9623983 DOI: 10.1186/s40246-022-00427-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 10/19/2022] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Autism spectrum disorder (ASD) is often accompanied by intellectual disability (ID). Despite extensive studies, however, the genetic basis for this comorbidity is still not clear. In this study, we tried to develop an analyzing pipeline for de novo mutations and possible pathways related to ID phenotype in ASD. Whole-exome sequencing (WES) was performed to screen de novo mutations and candidate genes in 79 ASD children together with their parents (trios). The de novo altering genes and relative pathways which were associated with ID phenotype were analyzed. The connection nodes (genes) of above pathways were selected, and the diagnostic value of these selected genes for ID phenotype in the study population was also evaluated. RESULTS We identified 89 de novo mutant genes, of which 34 genes were previously reported to be associated with ASD, including double hits in the EGF repeats of NOTCH1 gene (p.V999M and p.S1027L). Interestingly, of these 34 genes, 22 may directly affect intelligence quotient (IQ). Further analyses revealed that these IQ-related genes were enriched in protein synthesis, energy metabolism, and amino acid metabolism, and at least 9 genes (CACNA1A, ALG9, PALM2, MGAT4A, PCK2, PLEKHA1, PSME3, ADI1, and TLE3) were involved in all these three pathways. Seven patients who harbored these gene mutations showed a high prevalence of a low IQ score (< 70), a non-verbal language, and an early diagnostic age (< 4 years). Furthermore, our panel of these 9 genes reached a 10.2% diagnostic rate (5/49) in early diagnostic patients with a low IQ score and also reached a 10% diagnostic yield in those with both a low IQ score and non-verbal language (4/40). CONCLUSION We found some new genetic disposition for ASD accompanied with intellectual disability in this study. Our results may be helpful for etiologic research and early diagnoses of intellectual disability in ASD. Larger population studies and further mechanism studies are warranted.
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Affiliation(s)
- Wen-Xiong Chen
- grid.410737.60000 0000 8653 1072The Assessment and Intervention Center for Autistic Children, Department of Neurology, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, 510623 Guangdong China
| | - Bin Liu
- grid.410737.60000 0000 8653 1072Guangzhou Institute of Pediatrics, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, 510623 China ,grid.258164.c0000 0004 1790 3548Department of Biobank, Shenzhen Baoan Women’s and Children’s Hospital, Jinan University, Shenzhen, 518102 Guangdong China
| | - Lijie Zhou
- grid.412719.8Department of Pediatric Rehabilitation, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052 China
| | - Xiaoli Xiong
- grid.410737.60000 0000 8653 1072Guangzhou Institute of Pediatrics, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, 510623 China
| | - Jie Fu
- grid.410737.60000 0000 8653 1072Guangzhou Institute of Pediatrics, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, 510623 China
| | - Zhi-Fang Huang
- grid.410737.60000 0000 8653 1072The Assessment and Intervention Center for Autistic Children, Department of Neurology, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, 510623 Guangdong China
| | - Ting Tan
- grid.410737.60000 0000 8653 1072Guangzhou Institute of Pediatrics, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, 510623 China
| | - Mingxi Tang
- grid.488387.8Department of Pathology, Affiliated Hospital of Southwest Medical University, Luzhou, 646000 Sichuan China
| | - Jun Wang
- grid.412719.8Department of Pediatric Rehabilitation, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052 China
| | - Ya-Ping Tang
- grid.410737.60000 0000 8653 1072Guangzhou Institute of Pediatrics, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, 510623 China ,grid.412719.8Department of Pediatric Rehabilitation, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052 China ,grid.12981.330000 0001 2360 039XGuangdong Provincial Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080 Guangdong China
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Palmelund LB, van Woerden GM, Bräuner-Osborne H, Wellendorph P. Development of a medium throughput whole-cell microtiter plate Thr286 autophosphorylation assay for CaMKIIα using ELISA. J Pharmacol Toxicol Methods 2022; 118:107226. [PMID: 36174932 DOI: 10.1016/j.vascn.2022.107226] [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: 04/18/2022] [Revised: 08/11/2022] [Accepted: 09/22/2022] [Indexed: 11/25/2022]
Abstract
Ca2+/calmodulin-dependent protein kinase II alpha (CaMKIIα) is a multifunctional Ser/Thr kinase involved in several neuronal signaling pathways including synaptic plasticity. CaMKIIα autonomous activity is highly dependent on Thr286 autophosphorylation (pThr286), which is widely used as a readout for its enzymatic activity. To readily characterise compounds and potential drug candidates targeting CaMKIIα, a simple, generic cell-based assay for quantification of pThr286 levels is needed. In this study, we present a cell-based assay using an adapted ELISA as a suitable and higher throughput alternative to Western blotting. In this 96-well plate-based assay, we use whole HEK293T cells recombinantly expressing CaMKIIα and apply a phospho-specific antibody to detect pThr286 levels by chemiluminescence. In parallel, total CaMKIIα expression levels are detected by fluorescence using an Alexa488-conjugated anti-myc antibody targeting a C-terminal myc-tag. By multiplexing chemiluminescence and fluorescence, phosphorylation levels are normalised to CaMKIIα total expression within each well. The specificity of the assay was confirmed using a phosphodead mutant (T286A) of CaMKIIα. By applying Ca2+ or known CaMKIIα inhibitors (KN93, tatCN21 and AS100105) and obtaining concentration-response curves, we demonstrate high sensitivity and validity of the assay. Lastly, we demonstrate the versatility of the assay by determining autophosphorylation levels in CaMKIIα patient-related mutations, known to possess altered pThr286 responses (E109D, E183V and H282R). The established assay for CaMKIIα is a reproducible, easily implemented, and facile ELISA-based assay that allows for reliable quantification of pThr286 levels.
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Affiliation(s)
- Line B Palmelund
- University of Copenhagen, Department of Drug Design and Pharmacology, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Geeske M van Woerden
- Erasmus University Medical Center, Department of Neuroscience and Department of Clinical Genetics, 3015, CN, Rotterdam, the Netherlands
| | - Hans Bräuner-Osborne
- University of Copenhagen, Department of Drug Design and Pharmacology, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Petrine Wellendorph
- University of Copenhagen, Department of Drug Design and Pharmacology, Universitetsparken 2, 2100 Copenhagen, Denmark.
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Panov J, Kaphzan H. An Association Study of DNA Methylation and Gene Expression in Angelman Syndrome: A Bioinformatics Approach. Int J Mol Sci 2022; 23:ijms23169139. [PMID: 36012404 PMCID: PMC9409443 DOI: 10.3390/ijms23169139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 07/27/2022] [Accepted: 08/05/2022] [Indexed: 12/01/2022] Open
Abstract
Angelman syndrome (AS) is a neurodevelopmental disorder caused by the loss of function of the E3-ligase UBE3A. Despite multiple studies, AS pathophysiology is still obscure and has mostly been explored in rodent models of the disease. In recent years, a growing body of studies has utilized omics datasets in the attempt to focus research regarding the pathophysiology of AS. Here, for the first time, we utilized a multi-omics approach at the epigenomic level and the transcriptome level, for human-derived neurons. Using publicly available datasets for DNA methylation and gene expression, we found genome regions in proximity to gene promoters and intersecting with gene-body regions that were differentially methylated and differentially expressed in AS. We found that overall, the genome in AS postmortem brain tissue was hypo-methylated compared to healthy controls. We also found more upregulated genes than downregulated genes in AS. Many of these dysregulated genes in neurons obtained from AS patients are known to be critical for neuronal development and synaptic functioning. Taken together, our results suggest a list of dysregulated genes that may be involved in AS development and its pathological features. Moreover, these genes might also have a role in neurodevelopmental disorders similar to AS.
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Adeyelu T, Shrestha A, Adeniyi PA, Lee CC, Ogundele OM. CA1 Spike Timing is Impaired in the 129S Inbred Strain During Cognitive Tasks. Neuroscience 2022; 484:119-138. [PMID: 34800576 PMCID: PMC8844212 DOI: 10.1016/j.neuroscience.2021.11.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 11/08/2021] [Accepted: 11/10/2021] [Indexed: 01/16/2023]
Abstract
A spontaneous mutation of the disrupted in schizophrenia 1 (Disc1) gene is carried by the 129S inbred mouse strain. Truncated DISC1 protein in 129S mouse synapses impairs the scaffolding of excitatory postsynaptic receptors and leads to progressive spine dysgenesis. In contrast, C57BL/6 inbred mice carry the wild-type Disc1 gene and exhibit more typical cognitive performance in spatial exploration and executive behavioral tests. Because of the innate Disc1 mutation, adult 129S inbred mice exhibit the behavioral phenotypes of outbred B6 Disc1 knockdown (Disc1-/-) or Disc1-L-100P mutant strains. Recent studies in Disc1-/- and L-100P mice have shown that impaired excitation-driven interneuron activity and low hippocampal theta power underlie the behavioral phenotypes that resemble human depression and schizophrenia. The current study compared the firing rate and connectivity profile of putative neurons in the CA1 of freely behaving inbred 129S and B6 mice, which have mutant and wild-type Disc1 genes, respectively. In cognitive behavioral tests, 129S mice had lower exploration scores than B6 mice. Furthermore, the mean firing rate for 129S putative pyramidal (pyr) cells and interneurons (int) was significantly lower than that for B6 CA1 neurons sampled during similar tasks. Analysis of pyr/int connectivity revealed a significant delay in synaptic transmission for 129S putative pairs. Sampled 129S pyr/int pairs also had lower detectability index scores than B6 putative pairs. Therefore, the spontaneous Disc1 mutation in the 129S strain attenuates the firing of putative pyr CA1 neurons and impairs spike timing fidelity during cognitive tasks.
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Affiliation(s)
- Tolulope Adeyelu
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary Medicine. Baton Rouge, LA70803, Louisiana
| | - Amita Shrestha
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary Medicine. Baton Rouge, LA70803, Louisiana
| | - Philip A. Adeniyi
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary Medicine. Baton Rouge, LA70803, Louisiana
| | - Charles C. Lee
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary Medicine. Baton Rouge, LA70803, Louisiana
| | - Olalekan M. Ogundele
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary Medicine. Baton Rouge, LA70803, Louisiana
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Sultana R, Brooks CB, Shrestha A, Ogundele OM, Lee CC. Perineuronal Nets in the Prefrontal Cortex of a Schizophrenia Mouse Model: Assessment of Neuroanatomical, Electrophysiological, and Behavioral Contributions. Int J Mol Sci 2021; 22:11140. [PMID: 34681799 PMCID: PMC8538055 DOI: 10.3390/ijms222011140] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 10/06/2021] [Accepted: 10/11/2021] [Indexed: 01/01/2023] Open
Abstract
Schizophrenia is a neurodevelopmental disorder whose etiopathogenesis includes changes in cellular as well as extracellular structures. Perineuronal nets (PNNs) associated with parvalbumin-positive interneurons (PVs) in the prefrontal cortex (PFC) are dysregulated in schizophrenia. However, the postnatal development of these structures along with their associated neurons in the PFC is unexplored, as is their effects on behavior and neural activity. Therefore, in this study, we employed a DISC1 (Disruption in Schizophrenia) mutation mouse model of schizophrenia to assess these developmental changes and tested whether enzymatic digestion of PNNs in the PFC affected schizophrenia-like behaviors and neural activity. Developmentally, we found that the normal formation of PNNs, PVs, and colocalization of these two in the PFC, peaked around PND 22 (postnatal day 22). However, in DISC1, mutation animals from PND 0 to PND 60, both PNNs and PVs were significantly reduced. After enzymatic digestion of PNNs with chondroitinase in adult animals, the behavioral pattern of control animals mimicked that of DISC1 mutation animals, exhibiting reduced sociability, novelty and increased ultrasonic vocalizations, while there was very little change in other behaviors, such as working memory (Y-maze task involving medial temporal lobe) or depression-like behavior (tail-suspension test involving processing via the hypothalamic pituitary adrenal (HPA) axis). Moreover, following chondroitinase treatment, electrophysiological recordings from the PFC exhibited a reduced proportion of spontaneous, high-frequency firing neurons, and an increased proportion of irregularly firing neurons, with increased spike count and reduced inter-spike intervals in control animals. These results support the proposition that the aberrant development of PNNs and PVs affects normal neural operations in the PFC and contributes to the emergence of some of the behavioral phenotypes observed in the DISC1 mutation model of schizophrenia.
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Affiliation(s)
- Razia Sultana
- Department of Comparative Biomedical Sciences, LSU School of Veterinary Medicine, Baton Rouge, LA 70803, USA; (C.B.B.); (A.S.); (O.M.O.)
| | | | | | | | - Charles Chulsoo Lee
- Department of Comparative Biomedical Sciences, LSU School of Veterinary Medicine, Baton Rouge, LA 70803, USA; (C.B.B.); (A.S.); (O.M.O.)
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Effects of datumetine on hippocampal NMDAR activity. Toxicol Rep 2021; 8:1131-1142. [PMID: 34150523 PMCID: PMC8190477 DOI: 10.1016/j.toxrep.2021.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 03/16/2021] [Accepted: 05/21/2021] [Indexed: 11/20/2022] Open
Abstract
The usage (abuse) of Datura metel is becoming increasingly worrisome among the Nigerian populace especially among the youth considering its side effects such as hallucination. This work was designed to identify the phytochemicals in datura plant that potentially interact with NMDAR as it affects the electrical and memory activities of the brain. Ligand-protein interaction was assessed using autodock vina to identify phytochemicals that can interact with NMDAR. Datumetine was found to have the best interaction fit with NMDAR at both allosteric and orthosteric binding sites. Furthermore, using electrophysiological, behavioural and western blotting techniques, it was observed that the administration of datumetine positively modulates the NMDAR current by prolonging burst duration and interspike interval, induces seizures in C57BL/6 mice. Acute exposure leads to memory deficit on NOR and Y-maze test while immunoblotting results showed increased expression of GluN1 and CamKIIα while pCamKIIα-T286, CREB and BDNF were downregulated. The results showed that the memory deficit seen in datura intoxication is possibly the effects of datumetine on NMDAR.
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Ishola AO, Imam A, Ajao MS. Datumetine exposure alters hippocampal neurotransmitters system in C57BL/6 mice. Drug Chem Toxicol 2020; 45:785-798. [PMID: 32847421 DOI: 10.1080/01480545.2020.1776315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Our previous study showed that datumetine modulates NMDAR activity with long term exposure leading to memory deficit and altered NMDAR signaling. We aim to explore the neurotransmitters perturbations of acute datumetine-NMDAR interaction. Fifteen C57/BL6 mice were used for the study, they are divided into three groups of 5 animals each. Animals were administered DMSO (DMSO/Control), 0.25 mg/kg body weight of datumetine (0.25 Datumetine) and 1 mg/kg bodyweight of datumetine (1.0 Datumetine) intraperitoneally for 14 days. At the end of treatment, animals were euthanized in isofluorane chamber, perfused transcardially with 1XPBS followed by PFA. Immunofluorescence procedure was done to check the distribution of neurons, astrocytes, microglia and major neuronal subtypes in the hippocampus. Expansion and electron microscopy techniques were used to assess the condition of the synapses. Quantitative data were expressed as mean ± SEM and analyzed using ANOVA with Tukey post hoc using p < 0.05 as significant. Datumetine increased the expression of CD11b, GFAP, vGlut1, GABA, CHRNA7 and TH while expression of TrPH and NeuN were reduced in the hippocampus compared to control animals. Synaptic loss was evident in datumetine exposed animals with reduced synaptic vesicles accompanied by a thickness of postsynaptic density than that of control animals. This study concludes that acute datumetine exposure alters hippocampal neurotransmitter systems.
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Affiliation(s)
- Azeez Olakunle Ishola
- Department of Anatomy, University of Ilorin, Ilorin, Nigeria.,Department of Anatomy, Afe Babalola University, Ado-Ekiti, Nigeria
| | - Aminu Imam
- Department of Anatomy, University of Ilorin, Ilorin, Nigeria
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