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Garemilla S, Kumari R, Kumar R. CDK5 as a therapeutic tool for the treatment of Alzheimer's disease: A review. Eur J Pharmacol 2024; 978:176760. [PMID: 38901526 DOI: 10.1016/j.ejphar.2024.176760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 06/17/2024] [Accepted: 06/18/2024] [Indexed: 06/22/2024]
Abstract
Alzheimer's disease (AD) remains one of the most challenging and prevalent neurodegenerative disorders worldwide. Despite extensive research efforts, effective treatments for AD are lacking, emphasising the need for a deeper understanding of its underlying molecular mechanisms. Cyclin-dependent kinase 5 (CDK5), a serine/threonine kinase primarily associated with cell cycle regulation and neuronal development, has emerged as a key player in AD pathology. This review article comprehensively explores the multifaceted roles of CDK5 in the pathogenesis of AD. We begin by elucidating the physiological functions of CDK5 in normal brain development and neuronal maintenance, highlighting its involvement in synaptic plasticity, neurotransmitter release, and cytoskeletal dynamics. Subsequently, we delve into the dysregulation of CDK5 activity observed in AD, encompassing aberrant hyperactivation, and dysregulated protein interactions. Moreover, we discuss the intricate interplay between CDK5 and AD-related proteins, including amyloid-beta precursor protein (APP) and tau protein, elucidating their collective impact on disease progression. Finally, we described various approaches available for the inhibition of CDK-5, which can be explored as future therapeutic intervention for AD. Through synthesizing evidence from in vitro studies, animal models, and clinical investigations, this review provides a comprehensive overview of the intricate relationship between CDK5 dysregulation and AD pathogenesis, offering insights that may inform future therapeutic interventions strategies.
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Affiliation(s)
- Sandilya Garemilla
- Department of Life Sciences, GITAM School of Sciences, GITAM (Deemed to Be) University, Visakhapatnam, India; The George Washington University, Washington, DC, USA
| | - Richa Kumari
- Department of Life Sciences, GITAM School of Sciences, GITAM (Deemed to Be) University, Visakhapatnam, India; Department of Biotechnology, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Rahul Kumar
- Department of Life Sciences, GITAM School of Sciences, GITAM (Deemed to Be) University, Visakhapatnam, India.
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2
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Yang S, Qiao J, Zhang M, Kwok LY, Matijašić BB, Zhang H, Zhang W. Prevention and treatment of antibiotics-associated adverse effects through the use of probiotics: A review. J Adv Res 2024:S2090-1232(24)00230-3. [PMID: 38844120 DOI: 10.1016/j.jare.2024.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 05/18/2024] [Accepted: 06/03/2024] [Indexed: 06/29/2024] Open
Abstract
BACKGROUND The human gut hosts a diverse microbial community, essential for maintaining overall health. However, antibiotics, commonly prescribed for infections, can disrupt this delicate balance, leading to antibiotic-associated diarrhea, inflammatory bowel disease, obesity, and even neurological disorders. Recognizing this, probiotics have emerged as a promising strategy to counteract these adverse effects. AIM OF REVIEW This review aims to offer a comprehensive overview of the latest evidence concerning the utilization of probiotics in managing antibiotic-associated side effects. KEY SCIENTIFIC CONCEPTS OF REVIEW Probiotics play a crucial role in preserving gut homeostasis, regulating intestinal function and metabolism, and modulating the host immune system. These mechanisms serve to effectively alleviate antibiotic-associated adverse effects and enhance overall well-being.
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Affiliation(s)
- Shuwei Yang
- Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Huhhot 010018, China
| | - Jiaqi Qiao
- Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Huhhot 010018, China
| | - Meng Zhang
- Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Huhhot 010018, China
| | - Lai-Yu Kwok
- Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Huhhot 010018, China
| | | | - Heping Zhang
- Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Huhhot 010018, China
| | - Wenyi Zhang
- Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Huhhot 010018, China.
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Fu Y, Yuan P, Zeng M, Zhang Q, Hou Y, Gao L, Wei Y, Zheng Y, Feng W, Zheng X. Dihydroquercetin regulates HIF-1α/AKT/NR2B signalling to improve impaired brain function in rats with metabolic syndrome. Heliyon 2024; 10:e29807. [PMID: 38737244 PMCID: PMC11088260 DOI: 10.1016/j.heliyon.2024.e29807] [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: 08/01/2023] [Revised: 03/19/2024] [Accepted: 04/15/2024] [Indexed: 05/14/2024] Open
Abstract
Dihydroquercetin (DHQ) is commonly used as a dietary additive, but its activity in improving brain injury with metabolic syndrome (MS) remains known. In present study, the MS rat model was induced using 10 % fructose water. The apoptosis rate of primary brain cells was detected. The HIF-1α/AKT/NR2B signalling pathway, levels of KEAP1/NRF2, HO-1 and NQO-1 were detected. In vitro experiments were performed using H2O2-stimulated PC-12 cells. The effect of DHQ on rates of cell survival and apoptosis were detected. After silencing HIF-1α, we further elucidate the mechanism of action of DHQ. The results indicated that DHQ reduced the hyperactivity and inhibited oxidative stress via increasing the levels of HIF-1α/AKT/NR2B signalling pathway, whereas regulated KEAP1/NRF2 pathway. In vitro experiments showed that the HIF-1α plays an important role in this process. Overall, DHQ may improve impaired brain function in rats with metabolic syndrome by regulating the HIF-1α/AKT/NR2B signalling pathway.
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Affiliation(s)
- Yang Fu
- Department of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou 450046, China
| | - PeiPei Yuan
- Department of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou 450046, China
| | - Mengnan Zeng
- Department of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou 450046, China
| | - Qi Zhang
- Department of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Ying Hou
- Department of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Liyuan Gao
- Department of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Yaxin Wei
- Department of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Yajuan Zheng
- Department of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Weisheng Feng
- Department of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou 450046, China
| | - Xiaoke Zheng
- Department of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou 450046, China
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Balez R, Stevens CH, Lenk K, Maksour S, Sidhu K, Sutherland G, Ooi L. Increased Neuronal Nitric Oxide Synthase in Alzheimer's Disease Mediates Spontaneous Calcium Signaling and Divergent Glutamatergic Calcium Responses. Antioxid Redox Signal 2024. [PMID: 38299492 DOI: 10.1089/ars.2023.0395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
Nitrosative stress is a feature of Alzheimer's disease (AD). Aims: We aimed to identify the cause underpinning increased nitric oxide (NO) in neurons and the impact of NO on neuronal function in AD. Results: We analyzed neuronal nitric oxide synthase (nNOS) protein levels in postmortem tissue and induced pluripotent stem cell (iPSC)-derived neurons from Alzheimer's patients and controls by immunohistochemistry and Western blots. Furthermore, we assessed the impact of modulating nNOS function or NO levels on neuronal glutamatergic signaling using calcium imaging. We show that nNOS protein levels are increased in early and severely affected brain regions of AD postmortem tissue, but not late and mildly affected regions, or cognitively normal individuals. The increased nNOS phenotype was also present in iPSC-derived neurons from late-onset Alzheimer's disease (LOAD) patients compared with controls, along with increased levels of nitrite, a stable marker of NO. Innovation: We observed a divergent functional impact of NO that included strengthening the calcium response in control neurons, while dysregulating calcium signaling and altering the amplitude and kinetics of the calcium responses to glutamate in the AD neurons. Pharmacological scavenging of NO or inhibition of nNOS prevented aberrant spontaneous calcium signaling in AD neurons. Conclusion: Together these data identify increases in nNOS protein in AD. Functional data suggest that NO modulation of glutamatergic calcium signaling is neuroprotective under nonpathogenic conditions, with increased nNOS and NO contributing to dysregulated spontaneous calcium signaling in AD neurons.
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Affiliation(s)
- Rachelle Balez
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, Australia
| | - Claire H Stevens
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, Australia
| | - Kerstin Lenk
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Institute of Neural Engineering, Graz University of Technology, Graz, Austria
- BioTechMed, Graz, Austria
| | - Simon Maksour
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, Australia
| | - Kuldip Sidhu
- Centre for Healthy Brain Ageing (CheBA), University of New South Wales, Sydney, Australia
| | - Greg Sutherland
- Charles Perkins Centre, University of Sydney, Glebe, Australia
| | - Lezanne Ooi
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, Australia
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Ulu E, Demirci E, Sener EF, Özmen S, Gul MK, Tahtasakal R, Dal F. Role of Glutamate Receptor-related Biomarkers in the Etiopathogenesis of ADHD. CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE : THE OFFICIAL SCIENTIFIC JOURNAL OF THE KOREAN COLLEGE OF NEUROPSYCHOPHARMACOLOGY 2024; 22:79-86. [PMID: 38247414 PMCID: PMC10811385 DOI: 10.9758/cpn.23.1056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/28/2023] [Accepted: 05/02/2023] [Indexed: 01/23/2024]
Abstract
Objective : Pathways associated with glutamate receptors are known to play a role in the pathophysiology of attention-deficit hyperactivity disorder (ADHD). However, cyclin-dependent kinase 5 (CDK5), microtubule-associated protein-2 (MAP2), guanylate kinase-associated protein (GKAP), and postsynaptic density 95 (PSD95), all of which are biomarkers involved in neurodevelopmental processes closely related to glutamatergic pathways, have not previously been studied in patients with ADHD. The main purpose of this study was to evaluate the plasma levels of CDK5, MAP2, GKAP, and PSD95 in children with ADHD and investigate whether these markers have a role in the etiology of ADHD. Methods : Ninety-six children with ADHD between 6 and 15 years of age and 72 healthy controls were included in the study. Five milliliters of blood samples were taken from all participants. The samples were stored at -80°C until analyzed by the enzyme-linked immunosorbent assay method. Results : Statistically significantly lower CDK5 levels were observed in children with ADHD than in healthy controls (p = 0.037). The MAP2, GKAP, and PSD95 levels were found to be statistically significantly higher in the ADHD group than in healthy controls (p = 0.012, p = 0.009, and p = 0.024, respectively). According to binary regression analysis, CDK5 and MAP2 levels were found to be predictors of ADHD. Conclusion : In conclusion, we found that a close relationship existed between ADHD and glutamatergic pathways, and low levels of CDK5 and high levels of MAP2 and GKAP played a role in the etiopathogenesis of ADHD.
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Affiliation(s)
- Ebru Ulu
- Department of Child and Adolescent Psychiatry, Erciyes University School of Medicine, Kayseri, Turkey
| | - Esra Demirci
- Department of Child and Adolescent Psychiatry, Erciyes University School of Medicine, Kayseri, Turkey
| | - Elif Funda Sener
- Erciyes University Genome and Stem Cell Center (GENKOK), Department of Medical Biology, Erciyes University Faculty of Medicine, Kayseri, Turkey
| | - Sevgi Özmen
- Department of Child and Adolescent Psychiatry, Erciyes University School of Medicine, Kayseri, Turkey
| | - Melike Kevser Gul
- Department of Child and Adolescent Psychiatry, Kayseri City Hospital, Kayseri, Turkey
| | - Reyhan Tahtasakal
- Erciyes University Genome and Stem Cell Center (GENKOK), Department of Medical Biology, Erciyes University Faculty of Medicine, Kayseri, Turkey
| | - Fatma Dal
- Erciyes University Genome and Stem Cell Center (GENKOK), Department of Medical Biology, Erciyes University Faculty of Medicine, Kayseri, Turkey
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Gandy HM, Hollis F, Hernandez CM, McQuail JA. Aging or chronic stress impairs working memory and modulates GABA and glutamate gene expression in prelimbic cortex. Front Aging Neurosci 2024; 15:1306496. [PMID: 38259638 PMCID: PMC10800675 DOI: 10.3389/fnagi.2023.1306496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 12/15/2023] [Indexed: 01/24/2024] Open
Abstract
The glucocorticoid (GC) hypothesis posits that effects of stress and dysregulated hypothalamic-pituitary-adrenal axis activity accumulate over the lifespan and contribute to impairment of neural function and cognition in advanced aging. The validity of the GC hypothesis is bolstered by a wealth of studies that investigate aging of the hippocampus and decline of associated mnemonic functions. The prefrontal cortex (PFC) mediates working memory which also decreases with age. While the PFC is susceptible to stress and GCs, few studies have formally assessed the application of the GC hypothesis to PFC aging and working memory. Using parallel behavioral and molecular approaches, we compared the effects of normal aging versus chronic variable stress (CVS) on working memory and expression of genes that encode for effectors of glutamate and GABA signaling in male F344 rats. Using an operant delayed match-to-sample test of PFC-dependent working memory, we determined that normal aging and CVS each significantly impaired mnemonic accuracy and reduced the total number of completed trials. We then determined that normal aging increased expression of Slc6a11, which encodes for GAT-3 GABA transporter expressed by astrocytes, in the prelimbic (PrL) subregion of the PFC. CVS increased PrL expression of genes associated with glutamatergic synapses: Grin2b that encodes the GluN2B subunit of NMDA receptor, Grm4 that encodes for metabotropic glutamate receptor 4 (mGluR4), and Plcb1 that encodes for phospholipase C beta 1, an intracellular signaling enzyme that transduces signaling of Group I mGluRs. Beyond the identification of specific genes that were differentially expressed between the PrL in normal aging or CVS, examination of Log2 fold-changes for all expressed glutamate and GABA genes revealed a positive association between molecular phenotypes of aging and CVS in the PrL but no association in the infralimbic subregion. Consistent with predictions of the GC hypothesis, PFC-dependent working memory and PrL glutamate/GABA gene expression demonstrate comparable sensitivity to aging and chronic stress. However, changes in expression of specific genes affiliated with regulation of extracellular GABA in normal aging vs. genes encoding for effectors of glutamatergic signaling during CVS suggest the presence of unique manifestations of imbalanced inhibitory and excitatory signaling in the PFC.
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Affiliation(s)
- Hannah M. Gandy
- Department of Pharmacology, Physiology, and Neuroscience, University of South Carolina School of Medicine, Columbia, SC, United States
| | - Fiona Hollis
- Department of Pharmacology, Physiology, and Neuroscience, University of South Carolina School of Medicine, Columbia, SC, United States
- Columbia VA Health Care System, Columbia, SC, United States
| | - Caesar M. Hernandez
- Department of Medicine, Division of Gerontology, Geriatrics, and Palliative Care, The University of Alabama at Birmingham, Birmingham, AL, United States
- Department of Neuroscience, University of Florida, Gainesville, FL, United States
| | - Joseph A. McQuail
- Department of Pharmacology, Physiology, and Neuroscience, University of South Carolina School of Medicine, Columbia, SC, United States
- Department of Neuroscience, University of Florida, Gainesville, FL, United States
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Ai H, Li M, Fang W, Wang X, Liu X, Wu L, Zhang B, Lu W. Disruption of Cdk5-GluN2B complex by a small interfering peptide attenuates social isolation-induced escalated intermale attack behavior and hippocampal oxidative stress in mice. Free Radic Biol Med 2024; 210:54-64. [PMID: 37979890 DOI: 10.1016/j.freeradbiomed.2023.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 09/04/2023] [Accepted: 11/11/2023] [Indexed: 11/20/2023]
Abstract
Social isolation has emerged as a significant issue during the COVID-19 pandemic that can adversely impact human mental health and potentially lead to pathological aggression. Given the lack of effective therapeutic interventions for aggressive behavior, alternative approaches are necessary. In this study, we utilized a genetic method combined with a pharmacological approach to identify and demonstrate the crucial role of Cdk5 in escalated intermale attack behavior induced by 2-week social isolation. Moreover, we developed a small peptide that effectively disrupts the interaction between Cdk5 and GluN2B, given the known involvement of this complex in various neuropsychiatric disorders. Administration of the peptide, either systemically or via intrahippocampal injection, significantly reduced oxidative stress in the hippocampus and attenuated intermale attack behavior induced by 2-week social isolation. These findings highlight the previously unknown role of the hippocampal Cdk5-GluN2B complex in social isolation-induced aggressive behavior in mice and propose the peptide as a promising therapeutic strategy for regulating attack behavior and oxidative stress.
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Affiliation(s)
- Heng Ai
- School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Minghao Li
- School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Weiqing Fang
- Department of Pharmacy, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China
| | - Xuemeng Wang
- Department of the First Clinical Medicine, Hainan Medical University, Haikou, China; Key Laboratory of Molecular Biology, School of Basic Medicine and Life Sciences, Hainan Medical University, Haikou, Hainan, China
| | - Xinxin Liu
- Department of the First Clinical Medicine, Hainan Medical University, Haikou, China; Key Laboratory of Molecular Biology, School of Basic Medicine and Life Sciences, Hainan Medical University, Haikou, Hainan, China
| | - Lihui Wu
- School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Bin Zhang
- Key Laboratory of Novel Targets and Drug Study for Neural Repair of Zhejiang Province, School of Medicine, Hangzhou City University, China.
| | - Wen Lu
- Department of Biochemistry and Molecular Biology, School of Basic Medicine and Life Sciences, Hainan Medical University, Haikou, Hainan, China; Key Laboratory of Molecular Biology, School of Basic Medicine and Life Sciences, Hainan Medical University, Haikou, Hainan, China.
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Sharifi M, Oryan S, Komaki A, Barkley V, Sarihi A, Mirnajafi-Zadeh J. Comparing the synaptic potentiation in schaffer collateral-CA1 synapses in dorsal and intermediate regions of the hippocampus in normal and kindled rats. IBRO Neurosci Rep 2023; 15:252-261. [PMID: 37841086 PMCID: PMC10570600 DOI: 10.1016/j.ibneur.2023.09.010] [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: 07/14/2023] [Revised: 09/26/2023] [Accepted: 09/30/2023] [Indexed: 10/17/2023] Open
Abstract
There is growing evidence that the hippocampus comprises diverse neural circuits that exhibit longitudinal variation in their properties, however, the intermediate region of the hippocampus has received comparatively little attention. Therefore, this study was designed to compared short- and long-term synaptic plasticity between the dorsal and intermediate regions of the hippocampus in normal and PTZ-kindled rats. Short-term plasticity was assessed by measuring the ratio of field excitatory postsynaptic potentials' (fEPSPs) slope in response to paired-pulse stimulation at three different inter-pulse intervals (20, 80, and 160 ms), while long-term plasticity was assessed using primed burst stimulation (PBS). The results showed that the basal synaptic strength differed between the dorsal and intermediate regions of the hippocampus in both control and kindled rats. In the control group, paired-pulse stimulation of Schaffer collaterals resulted in a significantly lower fEPSP slope in the intermediate part of the hippocampus compared to the dorsal region. Additionally, the magnitude of long-term potentiation (LTP) was significantly lower in the intermediate part of the hippocampus compared to the dorsal region. In PTZ-kindled rats, both short-term facilitation and long-term potentiation were impaired in both regions of the hippocampus. Interestingly, there was no significant difference in synaptic plasticity between the dorsal and intermediate regions in PTZ-kindled rats, despite impairments in both regions. This suggests that seizures eliminate the regional difference between the dorsal and intermediate parts of the hippocampus, resulting in similar electrophysiological activity in both regions in kindled animals. Future studies should consider this when investigating the responses of the dorsal and intermediate regions of the hippocampus following PTZ kindling.
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Affiliation(s)
- Maryam Sharifi
- Department of Animal Biology, Faculty of Biological Science, Kharazmi University, Tehran, Iran
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Shahrbanoo Oryan
- Department of Animal Biology, Faculty of Biological Science, Kharazmi University, Tehran, Iran
| | - Alireza Komaki
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
- Department of Neuroscience, School of Sciences and Advanced Technology in Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Victoria Barkley
- Krembil Research Institute, University Health Network, Toronto, Canada
| | - Abdolrahman Sarihi
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
- Department of Neuroscience, School of Sciences and Advanced Technology in Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Javad Mirnajafi-Zadeh
- Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Mony L, Paoletti P. Mechanisms of NMDA receptor regulation. Curr Opin Neurobiol 2023; 83:102815. [PMID: 37988826 DOI: 10.1016/j.conb.2023.102815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/31/2023] [Accepted: 10/31/2023] [Indexed: 11/23/2023]
Abstract
N-methyl-D-aspartate receptors (NMDARs) are glutamate-gated ion channels widely expressed in the central nervous system that play key role in brain development and plasticity. On the downside, NMDAR dysfunction, be it hyperactivity or hypofunction, is harmful to neuronal function and has emerged as a common theme in various neuropsychiatric disorders including autism spectrum disorders, epilepsy, intellectual disability, and schizophrenia. Not surprisingly, NMDAR signaling is under a complex set of regulatory mechanisms that maintain NMDAR-mediated transmission in check. These include an unusual large number of endogenous agents that directly bind NMDARs and tune their activity in a subunit-dependent manner. Here, we review current knowledge on the regulation of NMDAR signaling. We focus on the regulation of the receptor by its microenvironment as well as by external (i.e. pharmacological) factors and their underlying molecular and cellular mechanisms. Recent developments showing how NMDAR dysregulation participate to disease mechanisms are also highlighted.
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Affiliation(s)
- Laetitia Mony
- Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, Université PSL, CNRS, INSERM, F-75005 Paris, France.
| | - Pierre Paoletti
- Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, Université PSL, CNRS, INSERM, F-75005 Paris, France.
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10
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Brosens N, Simon C, Kessels HW, Lucassen PJ, Krugers HJ. Early life stress lastingly alters the function and AMPA-receptor composition of glutamatergic synapses in the hippocampus of male mice. J Neuroendocrinol 2023; 35:e13346. [PMID: 37901923 DOI: 10.1111/jne.13346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 08/15/2023] [Accepted: 08/28/2023] [Indexed: 10/31/2023]
Abstract
Early postnatal life is a sensitive period of development that shapes brain structure and function later in life. Exposure to stress during this critical time window can alter brain development and may enhance the susceptibility to psychopathology and neurodegenerative disorders later in life. The developmental effects of early life stress (ELS) on synaptic function are not fully understood, but could provide mechanistic insights into how ELS modifies later brain function and disease risk. We here assessed the effects of ELS on synaptic function and composition in the hippocampus of male mice. Mice were subjected to ELS by housing dams and pups with limited bedding and nesting material from postnatal days (P) 2-9. Synaptic strength was measured in terms of miniature excitatory postsynaptic currents (mEPSCs) in the hippocampal dentate gyrus at three different developmental stages: the early postnatal phase (P9), preadolescence (P21, at weaning) and adulthood at 3 months of age (3MO). Hippocampal synaptosome fractions were isolated from P9 and 3MO tissue and analyzed for protein content to assess postsynaptic composition. Finally, dendritic spine density was assessed in the DG at 3MO. At P9, ELS increased mEPSC frequency and amplitude. In parallel, synaptic composition was altered as PSD-95, GluA3 and GluN2B content were significantly decreased. The increased mEPSC frequency was sustained up to 3MO, at which age, GluA3 content was significantly increased. No differences were found in dendritic spine density. These findings highlight how ELS affects the development of hippocampal synapses, which could provide valuable insight into mechanisms how ELS alters brain function later in life.
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Affiliation(s)
- Niek Brosens
- SILS-CNS, University of Amsterdam, Amsterdam, The Netherlands
| | - Carla Simon
- SILS-CNS, University of Amsterdam, Amsterdam, The Netherlands
| | | | - Paul J Lucassen
- SILS-CNS, University of Amsterdam, Amsterdam, The Netherlands
| | - Harm J Krugers
- SILS-CNS, University of Amsterdam, Amsterdam, The Netherlands
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11
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Mackiewicz J, Lisek M, Boczek T. Targeting CaN/NFAT in Alzheimer's brain degeneration. Front Immunol 2023; 14:1281882. [PMID: 38077352 PMCID: PMC10701682 DOI: 10.3389/fimmu.2023.1281882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 11/06/2023] [Indexed: 12/18/2023] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder characterized by a progressive loss of cognitive functions. While the exact causes of this debilitating disorder remain elusive, numerous investigations have characterized its two core pathologies: the presence of β-amyloid plaques and tau tangles. Additionally, multiple studies of postmortem brain tissue, as well as results from AD preclinical models, have consistently demonstrated the presence of a sustained inflammatory response. As the persistent immune response is associated with neurodegeneration, it became clear that it may also exacerbate other AD pathologies, providing a link between the initial deposition of β-amyloid plaques and the later development of neurofibrillary tangles. Initially discovered in T cells, the nuclear factor of activated T-cells (NFAT) is one of the main transcription factors driving the expression of inflammatory genes and thus regulating immune responses. NFAT-dependent production of inflammatory mediators is controlled by Ca2+-dependent protein phosphatase calcineurin (CaN), which dephosphorylates NFAT and promotes its transcriptional activity. A substantial body of evidence has demonstrated that aberrant CaN/NFAT signaling is linked to several pathologies observed in AD, including neuronal apoptosis, synaptic deficits, and glia activation. In view of this, the role of NFAT isoforms in AD has been linked to disease progression at different stages, some of which are paralleled to diminished cognitive status. The use of classical inhibitors of CaN/NFAT signaling, such as tacrolimus or cyclosporine, or adeno-associated viruses to specifically inhibit astrocytic NFAT activation, has alleviated some symptoms of AD by diminishing β-amyloid neurotoxicity and neuroinflammation. In this article, we discuss the recent findings related to the contribution of CaN/NFAT signaling to the progression of AD and highlight the possible benefits of targeting this pathway in AD treatment.
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Affiliation(s)
| | | | - Tomasz Boczek
- Department of Molecular Neurochemistry, Medical University of Lodz, Lodz, Poland
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12
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Luo M, Yi Y, Huang S, Dai S, Xie L, Liu K, Zhang S, Jiang T, Wang T, Yao B, Wang H, Xu D. Gestational dexamethasone exposure impacts hippocampal excitatory synaptic transmission and learning and memory function with transgenerational effects. Acta Pharm Sin B 2023; 13:3708-3727. [PMID: 37719378 PMCID: PMC10501875 DOI: 10.1016/j.apsb.2023.05.013] [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: 02/10/2023] [Revised: 04/20/2023] [Accepted: 05/06/2023] [Indexed: 09/19/2023] Open
Abstract
The formation of learning and memory is regulated by synaptic plasticity in hippocampal neurons. Here we explored how gestational exposure to dexamethasone, a synthetic glucocorticoid commonly used in clinical practice, has lasting effects on offspring's learning and memory. Adult offspring rats of prenatal dexamethasone exposure (PDE) displayed significant impairments in novelty recognition and spatial learning memory, with some phenotypes maintained transgenerationally. PDE impaired synaptic transmission of hippocampal excitatory neurons in offspring of F1 to F3 generations, and abnormalities of neurotransmitters and receptors would impair synaptic plasticity and lead to impaired learning and memory, but these changes failed to carry over to offspring of F5 and F7 generations. Mechanistically, altered hippocampal miR-133a-3p-SIRT1-CDK5-NR2B signaling axis in PDE multigeneration caused inhibition of excitatory synaptic transmission, which might be related to oocyte-specific high expression and transmission of miR-133a-3p. Together, PDE affects hippocampal excitatory synaptic transmission, with lasting consequences across generations, and CDK5 in offspring's peripheral blood might be used as an early-warning marker for fetal-originated learning and memory impairment.
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Affiliation(s)
- Mingcui Luo
- Department of Obstetrics, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China
| | - Yiwen Yi
- Department of Pharmacology, Taikang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan 430071, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China
| | - Songqiang Huang
- Department of Pharmacology, Taikang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan 430071, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China
| | - Shiyun Dai
- Department of Pharmacology, Taikang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan 430071, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China
| | - Lulu Xie
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China
- Department of Pediatrics, Renmin Hospital of Wuhan University, Wuhan 430071, China
| | - Kexin Liu
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China
- Department of Pharmacy, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Shuai Zhang
- Department of Obstetrics, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China
| | - Tao Jiang
- Department of Pharmacology, Taikang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan 430071, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China
| | - Tingting Wang
- Department of Obstetrics, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China
| | - Baozhen Yao
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China
- Department of Pediatrics, Renmin Hospital of Wuhan University, Wuhan 430071, China
| | - Hui Wang
- Department of Pharmacology, Taikang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan 430071, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China
| | - Dan Xu
- Department of Obstetrics, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China
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13
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Dong B, Yue Y, Dong H, Wang Y. N-methyl-D-aspartate receptor hypofunction as a potential contributor to the progression and manifestation of many neurological disorders. Front Mol Neurosci 2023; 16:1174738. [PMID: 37396784 PMCID: PMC10308130 DOI: 10.3389/fnmol.2023.1174738] [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: 02/27/2023] [Accepted: 05/26/2023] [Indexed: 07/04/2023] Open
Abstract
N-methyl-D-aspartate receptors (NMDA) are glutamate-gated ion channels critical for synaptic transmission and plasticity. A slight variation of NMDAR expression and function can result in devastating consequences, and both hyperactivation and hypoactivation of NMDARs are detrimental to neural function. Compared to NMDAR hyperfunction, NMDAR hypofunction is widely implicated in many neurological disorders, such as intellectual disability, autism, schizophrenia, and age-related cognitive decline. Additionally, NMDAR hypofunction is associated with the progression and manifestation of these diseases. Here, we review the underlying mechanisms of NMDAR hypofunction in the progression of these neurological disorders and highlight that targeting NMDAR hypofunction is a promising therapeutic intervention in some neurological disorders.
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Affiliation(s)
- Bin Dong
- Department of Geriatrics, Jilin Geriatrics Clinical Research Center, The First Hospital of Jilin University, Changchun, China
| | - Yang Yue
- School of Psychology, Northeast Normal University, Changchun, China
| | - Han Dong
- Department of Geriatrics, Jilin Geriatrics Clinical Research Center, The First Hospital of Jilin University, Changchun, China
| | - Yuehui Wang
- Department of Geriatrics, Jilin Geriatrics Clinical Research Center, The First Hospital of Jilin University, Changchun, China
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14
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A review on cyclin-dependent kinase 5: An emerging drug target for neurodegenerative diseases. Int J Biol Macromol 2023; 230:123259. [PMID: 36641018 DOI: 10.1016/j.ijbiomac.2023.123259] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 01/05/2023] [Accepted: 01/10/2023] [Indexed: 01/13/2023]
Abstract
Cyclin-dependent kinase 5 (CDK5) is the serine/threonine-directed kinase mainly found in the brain and plays a significant role in developing the central nervous system. Recent evidence suggests that CDK5 is activated by specific cyclins regulating its expression and activity. P35 and p39 activate CDK5, and their proteolytic degradation produces p25 and p29, which are stable products involved in the hyperphosphorylation of tau protein, a significant hallmark of various neurological diseases. Numerous high-affinity inhibitors of CDK5 have been designed, and some are marketed drugs. Roscovitine, like other drugs, is being used to minimize neurological symptoms. Here, we performed an extensive literature analysis to highlight the role of CDK5 in neurons, synaptic plasticity, DNA damage repair, cell cycle, etc. We have investigated the structural features of CDK5, and their binding mode with the designed inhibitors is discussed in detail to develop attractive strategies in the therapeutic targeting of CDK5 for neurodegenerative diseases. This review provides deeper mechanistic insights into the therapeutic potential of CDK5 inhibitors and their implications in the clinical management of neurodegenerative diseases.
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15
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Xu F, Cong P, Zhang B, Dong H, Zuo W, Wu T, Tian L, Xiong L. A decrease in NR2B expression mediated by DNA hypermethylation induces perioperative neurocognitive disorder in aged mice. CNS Neurosci Ther 2023; 29:1229-1242. [PMID: 36694341 PMCID: PMC10068472 DOI: 10.1111/cns.14097] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 01/08/2023] [Accepted: 01/09/2023] [Indexed: 01/26/2023] Open
Abstract
AIMS This study was designed to investigate the role of NR2B and the contribution of DNA methylation to NR2B expression in the pathogenesis of PND. METHODS Eighteen-month-old C57BL/6J mice were subjected to experimental laparotomy under 1.4% isoflurane anesthesia. Hippocampus-dependent learning and memory were evaluated by using the Barnes maze and contextual fear conditioning tests. The protein and mRNA expression levels of NR2B were evaluated by western blotting and qRT-PCR respectively, and the methylation of the NR2B gene was examined by using targeted bisulfite sequencing. Long-term synaptic plasticity (LTP) was measured by electrophysiology. RESULTS Mice that underwent laparotomy exhibited hippocampus-dependent cognitive deficits accompanied by decreased NR2B expressions and LTP deficiency. The overexpression of NR2B in the dorsal hippocampus could improve learning and memory in mice subjected to laparotomy. In particular, the decreased NR2B expressions induced by laparotomy was attributed to the NR2B gene hypermethylation. Preoperative administration of S-adenosylmethionine (SAM) could hypomethylate the NR2B gene, upregulate NR2B expression and improve LTP, exerting a dose-dependent therapeutic effect against PND. Moreover, inhibiting NR2B abrogated the benefits of SAM pretreatment. CONCLUSIONS Laparotomy cause hippocampus-dependent cognitive decline by hypermethylating the NR2B gene, allowing us to understand the pathogenesis of PND in an epigenetic landscape.
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Affiliation(s)
- Feifei Xu
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Peilin Cong
- Department of Anesthesiology and Perioperative Medicine, Shanghai Fourth People's Hospital Affiliated to Tongji University School of Medicine, Translational Research Institute of Brain and Brain-Like Intelligence Affiliated to Tongji University School of Medicine, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, China
| | - Bingqian Zhang
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hailong Dong
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Wenqiang Zuo
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Tingmei Wu
- Department of Anesthesiology and Perioperative Medicine, Shanghai Fourth People's Hospital Affiliated to Tongji University School of Medicine, Translational Research Institute of Brain and Brain-Like Intelligence Affiliated to Tongji University School of Medicine, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, China
| | - Li Tian
- Department of Anesthesiology and Perioperative Medicine, Shanghai Fourth People's Hospital Affiliated to Tongji University School of Medicine, Translational Research Institute of Brain and Brain-Like Intelligence Affiliated to Tongji University School of Medicine, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, China
| | - Lize Xiong
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, China.,Department of Anesthesiology and Perioperative Medicine, Shanghai Fourth People's Hospital Affiliated to Tongji University School of Medicine, Translational Research Institute of Brain and Brain-Like Intelligence Affiliated to Tongji University School of Medicine, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, China
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16
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Dai J, Xie R, Sun ZN, Kou XL, Zhang JQ, Qi C, Liu R, Gao X, Wang J, Gao J. Protein phosphatase 2A deficiency in hippocampal CA1 inhibits priming effect of morphine on conditioned place preference in mice. Cereb Cortex 2023:6982733. [PMID: 36627245 DOI: 10.1093/cercor/bhac527] [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: 10/27/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 01/12/2023] Open
Abstract
Studies have shown that protein phosphorylation plays an important role in morphine abuse. However, the neurobiological mechanism of protein phosphatase 2A (PP2A) underlying the morphine-priming process is still unclear. Here we constructed T29-2-Cre; PP2Afl/fl conditional knockout mice (KO) and investigated the role of hippocampal PP2A in morphine priming. We observed that the deficit of PP2A inhibited the priming behavior of morphine and blocked the priming-induced long-term potentiation (LTP) in the hippocampus of KO mice. Moreover, the expression levels of Rack1 and the membrane GluN2B were significantly reduced in the nucleus accumbens of KO mice compared with those in the control mice, which may be attributed to the decreased HDAC4 in the hippocampus of KO mice. Consistent with it, the similar inhibited priming effects were also observed in the wild-type mice treated with sodium butyrate (NaB)-a nonspecific inhibitor of histone deacetylases-3 h after morphine administration. Taken together, our results suggest that hippocampal PP2A may be involved in morphine priming through the PP2A/HDAC4/Rack1 pathway.
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Affiliation(s)
- Jing Dai
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Ran Xie
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Zhou-Na Sun
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Xiao-Lin Kou
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Jia-Qi Zhang
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Cui Qi
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Rui Liu
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Xiang Gao
- SKL of Pharmaceutical Biotechnology and Model Animal Research Center, Collaborative Innovation Center for Genetics and Development, Nanjing Biomedical Research Institute, Nanjing University, Xianlin Avenue 163, Qixia District, Nanjing 210061, China
| | - Jing Wang
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Jun Gao
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China.,Department of Rehabilitation Medicine, The Affiliated Jiangsu Shengze Hospital to Nanjing Medical University, Shichang West Road 1399, Wujiang District, Suzhou 215228, China
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17
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Yang Y, Lu M, Xu Y, Qian J, Le G, Xie Y. Dietary Methionine via Dose-Dependent Inhibition of Short-Chain Fatty Acid Production Capacity Contributed to a Potential Risk of Cognitive Dysfunction in Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:15225-15243. [PMID: 36413479 DOI: 10.1021/acs.jafc.2c04847] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
High-methionine diets induce impaired learning and memory function, dementia-like neurodegeneration, and Alzheimer's disease, while low-methionine diets improve learning and memory function. We speculated that variations in intestinal microbiota may mediate these diametrically opposed effects; thus, this study aimed to verify this hypothesis. The ICR mice were fed either a low-methionine diet (LM, 0.17% methionine), normal methionine diet (NM, 0.86% methionine), or high-methionine diet (HM, 2.58% methionine) for 11 weeks. We found that HM diets damaged nonspatial recognition memory, working memory, and hippocampus-dependent spatial memory and induced anxiety-like behaviors in mice. LM diets improved nonspatial recognition memory and hippocampus-dependent spatial memory and ameliorated anxiety-like behavior, but the differences did not reach a significant level. Moreover, HM diets significantly decreased the abundance of putative short-chain fatty acid (SCFA)-producing bacteria (Roseburia, Blautia, Faecalibaculum, and Bifidobacterium) and serotonin-producing bacteria (Turicibacter) and significantly increased the abundance of proinflammatory bacteria Escherichia-Shigella. Of note, LM diets reversed the results. Consequently, the SCFA and serotonin levels were significantly decreased with HM diets and significantly increased with LM diets. Furthermore, HM diets induced hippocampal oxidative stress and inflammation and selectively downregulated the hippocampus-dependent memory-related gene expression, whereas LM diets selectively upregulated the hippocampus-dependent memory-related gene expression. In conclusion, dietary methionine via dose-dependent inhibition of SCFA production capacity contributed to a potential risk of cognitive dysfunction in mice.
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Affiliation(s)
- Yuhui Yang
- National Engineering Laboratory/Key Laboratory of Henan Province, College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Manman Lu
- National Engineering Laboratory/Key Laboratory of Henan Province, College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Yuncong Xu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Jing Qian
- National Engineering Laboratory/Key Laboratory of Henan Province, College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Guowei Le
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Yanli Xie
- National Engineering Laboratory/Key Laboratory of Henan Province, College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
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18
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Inouye MO, Colameo D, Ammann I, Winterer J, Schratt G. miR-329- and miR-495-mediated Prr7 down-regulation is required for homeostatic synaptic depression in rat hippocampal neurons. Life Sci Alliance 2022; 5:5/12/e202201520. [PMID: 36150742 PMCID: PMC9510147 DOI: 10.26508/lsa.202201520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 09/13/2022] [Accepted: 09/13/2022] [Indexed: 12/03/2022] Open
Abstract
In rat hippocampal neurons, miRNA-dependent regulation of the synaptic Prr7 protein is required for the homeostatic synaptic depression of excitatory synapses upstream of the CDK5-SPAR pathway. Homeostatic synaptic depression (HSD) in excitatory neurons is a cell-autonomous mechanism which protects excitatory neurons from over-excitation as a consequence of chronic increases in network activity. In this process, excitatory synapses are weakened and eventually eliminated, as evidenced by a reduction in synaptic AMPA receptor expression and dendritic spine loss. Originally considered a global, cell-wide mechanism, local forms of regulation, such as the local control of mRNA translation in dendrites, are being increasingly recognized in HSD. Yet, identification of excitatory proteins whose local regulation is required for HSD is still limited. Here, we show that proline-rich protein 7/transmembrane adapter protein 3 (Prr7) down-regulation in dendrites of rat hippocampal neurons is necessary for HSD induced by chronic increase in network activity resulting from a blockade of inhibitory synaptic transmission by picrotoxin (PTX). We further identify two activity-regulated miRNAs, miR-329-3p and miR-495-3p, which inhibit Prr7 mRNA translation and are required for HSD. Moreover, we found that Prr7 knockdown reduces expression of the synaptic scaffolding protein SPAR, which is rescued by pharmacological inhibition of CDK5, indicating a role of Prr7 protein in the maintenance of excitatory synapses via protection of SPAR from degradation. Together, our findings highlight a novel HSD mechanism in which chronic activity leads to miR-329– and miR-495–mediated Prr7 reduction upstream of the CDK5-SPAR pathway.
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Affiliation(s)
- Michiko O Inouye
- Department of Health Science and Technology, Laboratory of Systems Neuroscience, Institute for Neuroscience, Swiss Federal Institute of Technology ETH, Zürich, Switzerland
| | - David Colameo
- Department of Health Science and Technology, Laboratory of Systems Neuroscience, Institute for Neuroscience, Swiss Federal Institute of Technology ETH, Zürich, Switzerland
| | - Irina Ammann
- Department of Health Science and Technology, Laboratory of Systems Neuroscience, Institute for Neuroscience, Swiss Federal Institute of Technology ETH, Zürich, Switzerland
| | - Jochen Winterer
- Department of Health Science and Technology, Laboratory of Systems Neuroscience, Institute for Neuroscience, Swiss Federal Institute of Technology ETH, Zürich, Switzerland
| | - Gerhard Schratt
- Department of Health Science and Technology, Laboratory of Systems Neuroscience, Institute for Neuroscience, Swiss Federal Institute of Technology ETH, Zürich, Switzerland
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Hu Z, Ondrejcak T, Yu P, Zhang Y, Yang Y, Klyubin I, Kennelly SP, Rowan MJ, Hu NW. Do tau-synaptic long-term depression interactions in the hippocampus play a pivotal role in the progression of Alzheimer's disease? Neural Regen Res 2022; 18:1213-1219. [PMID: 36453396 PMCID: PMC9838152 DOI: 10.4103/1673-5374.360166] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Cognitive decline in Alzheimer's disease correlates with the extent of tau pathology, in particular tau hyperphosphorylation that initially appears in the transentorhinal and related regions of the brain including the hippocampus. Recent evidence indicates that tau hyperphosphorylation caused by either amyloid-β or long-term depression, a form of synaptic weakening involved in learning and memory, share similar mechanisms. Studies from our group and others demonstrate that long-term depression-inducing low-frequency stimulation triggers tau phosphorylation at different residues in the hippocampus under different experimental conditions including aging. Conversely, certain forms of long-term depression at hippocampal glutamatergic synapses require endogenous tau, in particular, phosphorylation at residue Ser396. Elucidating the exact mechanisms of interaction between tau and long-term depression may help our understanding of the physiological and pathological functions of tau/tau (hyper)phosphorylation. We first summarize experimental evidence regarding tau-long-term depression interactions, followed by a discussion of possible mechanisms by which this interplay may influence the pathogenesis of Alzheimer's disease. Finally, we conclude with some thoughts and perspectives on future research about these interactions.
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Affiliation(s)
- Zhengtao Hu
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan Province, China,Department of Gerontology, The First Affiliated Hospital of Wannan Medical College, Wuhu, Anhui Province, China
| | - Tomas Ondrejcak
- Department of Pharmacology & Therapeutics and Institute of Neuroscience, Trinity College, Dublin, Ireland
| | - Pengpeng Yu
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan Province, China
| | - Yangyang Zhang
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan Province, China
| | - Yin Yang
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan Province, China,Department of Pharmacology & Therapeutics and Institute of Neuroscience, Trinity College, Dublin, Ireland
| | - Igor Klyubin
- Department of Pharmacology & Therapeutics and Institute of Neuroscience, Trinity College, Dublin, Ireland
| | - Sean P. Kennelly
- Department of Age-Related Healthcare, Tallaght University Hospital, Dublin, Ireland,Department of Medical Gerontology, Trinity College, Dublin, Ireland
| | - Michael J. Rowan
- Department of Pharmacology & Therapeutics and Institute of Neuroscience, Trinity College, Dublin, Ireland
| | - Neng-Wei Hu
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan Province, China,Department of Pharmacology & Therapeutics and Institute of Neuroscience, Trinity College, Dublin, Ireland,Correspondence to: Neng-Wei Hu, .
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20
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Tian Z, Feng B, Wang XQ, Tian J. Focusing on cyclin-dependent kinases 5: A potential target for neurological disorders. Front Mol Neurosci 2022; 15:1030639. [PMID: 36438186 PMCID: PMC9687395 DOI: 10.3389/fnmol.2022.1030639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 10/25/2022] [Indexed: 11/20/2023] Open
Abstract
Cyclin-dependent kinases 5 (Cdk5) is a special member of proline-directed serine threonine kinase family. Unlike other Cdks, Cdk5 is not directly involved in cell cycle regulation but plays important roles in nervous system functions. Under physiological conditions, the activity of Cdk5 is tightly controlled by p35 or p39, which are specific activators of Cdk5 and highly expressed in post-mitotic neurons. However, they will be cleaved into the corresponding truncated forms namely p25 and p29 under pathological conditions, such as neurodegenerative diseases and neurotoxic insults. The binding to truncated co-activators results in aberrant Cdk5 activity and contributes to the initiation and progression of multiple neurological disorders through affecting the down-stream targets. Although Cdk5 kinase activity is mainly regulated through combining with co-activators, it is not the only way. Post-translational modifications of Cdk5 including phosphorylation, S-nitrosylation, sumoylation, and acetylation can also affect its kinase activity and then participate in physiological and pathological processes of nervous system. In this review, we focus on the regulatory mechanisms of Cdk5 and its roles in a series of common neurological disorders such as neurodegenerative diseases, stroke, anxiety/depression, pathological pain and epilepsy.
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Affiliation(s)
- Zhen Tian
- College of Pharmaceutical Sciences, Southwest University, Chongqing, China
| | - Bin Feng
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of Pharmacy, School of Stomatology, Fourth Military Medical University, Xi’an, China
| | - Xing-Qin Wang
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Jiao Tian
- Department of Infection, Children’s Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Child Infection and Immunity, The First Batch of Key Disciplines On Public Health in Chongqing, Chongqing, China
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21
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Umfress A, Singh S, Ryan KJ, Chakraborti A, Plattner F, Sonawane Y, Mallareddy JR, Acosta EP, Natarajan A, Bibb JA. Systemic Administration of a Brain Permeable Cdk5 Inhibitor Alters Neurobehavior. Front Pharmacol 2022; 13:863762. [PMID: 35645825 PMCID: PMC9134315 DOI: 10.3389/fphar.2022.863762] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 04/01/2022] [Indexed: 01/09/2023] Open
Abstract
Cyclin-dependent kinase 5 (Cdk5) is a crucial regulator of neuronal signal transduction. Cdk5 activity is implicated in various neuropsychiatric and neurodegenerative conditions such as stress, anxiety, depression, addiction, Alzheimer's disease, and Parkinson's disease. While constitutive Cdk5 knockout is perinatally lethal, conditional knockout mice display resilience to stress-induction, enhanced cognition, neuroprotection from stroke and head trauma, and ameliorated neurodegeneration. Thus, Cdk5 represents a prime target for treatment in a spectrum of neurological and neuropsychiatric conditions. While intracranial infusions or treatment of acutely dissected brain tissue with compounds that inhibit Cdk5 have allowed the study of kinase function and corroborated conditional knockout findings, potent brain-penetrant systemically deliverable Cdk5 inhibitors are extremely limited, and no Cdk5 inhibitor has been approved to treat any neuropsychiatric or degenerative diseases to date. Here, we screened aminopyrazole-based analogs as potential Cdk5 inhibitors and identified a novel analog, 25-106, as a uniquely brain-penetrant anti-Cdk5 drug. We characterize the pharmacokinetic and dynamic responses of 25-106 in mice and functionally validate the effects of Cdk5 inhibition on open field and tail-suspension behaviors. Altogether, 25-106 represents a promising preclinical Cdk5 inhibitor that can be systemically administered with significant potential as a neurological/neuropsychiatric therapeutic.
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Affiliation(s)
- Alan Umfress
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Sarbjit Singh
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, United States
| | - Kevin J. Ryan
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Ayanabha Chakraborti
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, United States
| | | | - Yogesh Sonawane
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, United States
| | - Jayapal Reddy Mallareddy
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, United States
| | - Edward P. Acosta
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Amarnath Natarajan
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, United States
| | - James A. Bibb
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, United States,Departments of Neurobiology and Neurology, University of Alabama at Birmingham, Birmingham, AL, United States,O’Neil Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, United States,*Correspondence: James A. Bibb,
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22
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Rahman T, Purves-Tyson T, Geddes AE, Huang XF, Newell KA, Weickert CS. N-Methyl-d-Aspartate receptor and inflammation in dorsolateral prefrontal cortex in schizophrenia. Schizophr Res 2022; 240:61-70. [PMID: 34952289 DOI: 10.1016/j.schres.2021.11.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 11/02/2021] [Accepted: 11/27/2021] [Indexed: 10/19/2022]
Abstract
Lower N-methyl-d-aspartate receptor (NMDAR) GluN1 subunit levels and heightened neuroinflammation are found in the cortex in schizophrenia. Since neuroinflammation can lead to changes in NMDAR function, it is possible that these observations are linked in schizophrenia. We aimed to extend our previous studies by measuring molecular indices of NMDARs that define key functional properties of this receptor - particularly the ratio of GluN2A and GluN2B subunits - in dorsolateral prefrontal cortex (DLPFC) from schizophrenia and control cases (37/37). We sought to test whether changes in these measures are specific to the subset of schizophrenia cases with high levels of inflammation-related mRNAs, defined as a high inflammatory subgroup. Quantitative autoradiography was used to detect 'functional' NMDARs ([3H]MK-801), GluN1-coupled-GluN2A subunits ([3H]CGP-39653), and GluN1-coupled-GluN2B subunits ([3H]Ifenprodil). Quantitative RT-PCR was used to measure NMDAR subunit transcripts (GRIN1, GRIN2A and GRIN2B). The ratios of GluN2A:GluN2B binding and GRIN2A:GRIN2B mRNAs were calculated as an index of putative NMDAR composition. We found: 1) GluN2A binding, and 2) the ratios of GluN2A:GluN2B binding and GRIN2A:GRIN2B mRNAs were lower in schizophrenia cases versus controls (p < 0.05), and 3) lower GluN2A:GluN2B binding and GRIN2A:GRIN2B mRNA ratios were exaggerated in the high inflammation/schizophrenia subgroup compared to the low inflammation/control subgroup (p < 0.05). No other NMDAR-related indices were significantly changed in the high inflammation/schizophrenia subgroup. This suggests that neuroinflammation may alter NMDAR stoichiometry rather than targeting total NMDAR levels overall, and future studies could aim to determine if anti-inflammatory treatment can alleviate this aspect of NMDAR-related pathology.
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Affiliation(s)
- Tasnim Rahman
- Neuroscience Research Australia (NeuRA), Sydney, NSW, Australia; School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - Tertia Purves-Tyson
- Neuroscience Research Australia (NeuRA), Sydney, NSW, Australia; School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - Amy E Geddes
- School of Medicine and Molecular Horizons, University of Wollongong, Wollongong, NSW, Australia; Illawarra Health and Medical Research Institute, Wollongong, Australia
| | - Xu-Feng Huang
- School of Medicine and Molecular Horizons, University of Wollongong, Wollongong, NSW, Australia; Illawarra Health and Medical Research Institute, Wollongong, Australia
| | - Kelly A Newell
- School of Medicine and Molecular Horizons, University of Wollongong, Wollongong, NSW, Australia; Illawarra Health and Medical Research Institute, Wollongong, Australia.
| | - Cynthia Shannon Weickert
- Neuroscience Research Australia (NeuRA), Sydney, NSW, Australia; School of Psychiatry, University of New South Wales, Sydney, NSW, Australia; Department of Neuroscience & Physiology, Upstate Medical University, Syracuse, NY, USA.
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23
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Trask S, Ferrara NC, Jasnow AM, Kwapis JL. Contributions of the rodent cingulate-retrosplenial cortical axis to associative learning and memory: A proposed circuit for persistent memory maintenance. Neurosci Biobehav Rev 2021; 130:178-184. [PMID: 34450181 PMCID: PMC8511298 DOI: 10.1016/j.neubiorev.2021.08.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 08/18/2021] [Accepted: 08/22/2021] [Indexed: 10/20/2022]
Abstract
While the anterior cingulate (ACC) and retrosplenial (RSC) cortices have been extensively studied for their role in spatial navigation, less is known about how they contribute to associative learning and later memory recall. The limited work that has been conducted on this topic suggests that each of these cortical regions makes distinct, but similar contributions to associative learning and memory. Here, we review evidence from the rodent literature demonstrating that while ACC activity seems to be necessary at remote time points associated with imprecise or generalized memories, the role of the RSC seems to be uniform over time. Together, the lines of evidence reviewed here suggest that the ACC and RSC likely function together to support memory formation and maintenance following associative learning.
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Affiliation(s)
- Sydney Trask
- Department of Psychological Sciences, Purdue University, West Lafayette, IN, 47907, United States
| | - Nicole C Ferrara
- Department of Pharmacology, Rosalind Franklin University of Medicine and Science, North Chicago, IL, 60064, United States
| | - Aaron M Jasnow
- Department of Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, Columbia, SC, 29209, United States
| | - Janine L Kwapis
- Department of Biology, Pennsylvania State University, University Park, PA, 16802, United States.
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Carvajal FJ, Cerpa W. Regulation of Phosphorylated State of NMDA Receptor by STEP 61 Phosphatase after Mild-Traumatic Brain Injury: Role of Oxidative Stress. Antioxidants (Basel) 2021; 10:antiox10101575. [PMID: 34679709 PMCID: PMC8533270 DOI: 10.3390/antiox10101575] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/14/2021] [Accepted: 09/28/2021] [Indexed: 01/21/2023] Open
Abstract
Traumatic Brain Injury (TBI) mediates neuronal death through several events involving many molecular pathways, including the glutamate-mediated excitotoxicity for excessive stimulation of N-methyl-D-aspartate receptors (NMDARs), producing activation of death signaling pathways. However, the contribution of NMDARs (distribution and signaling-associated to the distribution) remains incompletely understood. We propose a critical role of STEP61 (Striatal-Enriched protein tyrosine phosphatase) in TBI; this phosphatase regulates the dephosphorylated state of the GluN2B subunit through two pathways: by direct dephosphorylation of tyrosine-1472 and indirectly via dephosphorylation and inactivation of Fyn kinase. We previously demonstrated oxidative stress’s contribution to NMDAR signaling and distribution using SOD2+/− mice such a model. We performed TBI protocol using a controlled frontal impact device using C57BL/6 mice and SOD2+/− animals. After TBI, we found alterations in cognitive performance, NMDAR-dependent synaptic function (decreased synaptic form of NMDARs and decreased synaptic current NMDAR-dependent), and increased STEP61 activity. These changes are reduced partially with the STEP61-inhibitor TC-2153 treatment in mice subjected to TBI protocol. This study contributes with evidence about the role of STEP61 in the neuropathological progression after TBI and also the alteration in their activity, such as an early biomarker of synaptic damage in traumatic lesions.
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Affiliation(s)
- Francisco J. Carvajal
- Laboratorio de Función y Patología Neuronal, Centro de Envejecimiento y Regeneración (CARE), Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago 8331150, Chile;
- Centro de Excelencia en Biomedicina de Magallanes (CEBIMA), Universidad de Magallanes, Punta Arenas 6200000, Chile
| | - Waldo Cerpa
- Laboratorio de Función y Patología Neuronal, Centro de Envejecimiento y Regeneración (CARE), Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago 8331150, Chile;
- Centro de Excelencia en Biomedicina de Magallanes (CEBIMA), Universidad de Magallanes, Punta Arenas 6200000, Chile
- Correspondence: ; Tel.: +56-2-2354-2656; Fax: +56-2-2354-2660
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25
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Umfress A, Speed HE, Tan C, Ramezani S, Birnbaum S, Brekken RA, Sun X, Plattner F, Powell CM, Bibb JA. Neuropathological Effects of Chemotherapeutic Drugs. ACS Chem Neurosci 2021; 12:3038-3048. [PMID: 34370453 DOI: 10.1021/acschemneuro.1c00338] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Novel treatments, screening, and detection methods have prolonged the lives of numerous cancer patients worldwide. Unfortunately, existing and many promising new chemotherapeutics can cause deleterious, off-target side effects in normal tissue and organ systems. The central and peripheral nervous systems are widely recognized as frequent off-target effectors of anticancer drugs which can produce persistent neurological and neuropsychiatric symptoms collectively termed "chemobrain". Following chemotherapy, patients report several forms of cognitive impairment occurring acutely and sometimes persisting years after treatment. There are no effective treatments for cognitive decline induced by chemotherapeutics, and the underlying molecular mechanisms are poorly characterized and understood. In this study, we find that chronic treatment with two common chemotherapeutic agents, cisplatin and gemcitabine, impairs brain region-specific metabolism, hippocampus-dependent memory formation, and stress response behavior. This corresponds to reduced hippocampal synaptic excitability, altered neuronal signal transduction, and neuroinflammation. These findings underline that a better understanding of the basic pathological consequences of chemotherapy-induced cognitive impairment is the first step toward improving cancer treatment survivorship.
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Affiliation(s)
- Alan Umfress
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama 35233, United States
| | | | | | | | | | | | | | | | | | - James A. Bibb
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama 35233, United States
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26
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Tian M, Stroebel D, Piot L, David M, Ye S, Paoletti P. GluN2A and GluN2B NMDA receptors use distinct allosteric routes. Nat Commun 2021; 12:4709. [PMID: 34354080 PMCID: PMC8342458 DOI: 10.1038/s41467-021-25058-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 07/21/2021] [Indexed: 11/17/2022] Open
Abstract
Allostery represents a fundamental mechanism of biological regulation that involves long-range communication between distant protein sites. It also provides a powerful framework for novel therapeutics. NMDA receptors (NMDARs), glutamate-gated ionotropic receptors that play central roles in synapse maturation and plasticity, are prototypical allosteric machines harboring large extracellular N-terminal domains (NTDs) that provide allosteric control of key receptor properties with impact on cognition and behavior. It is commonly thought that GluN2A and GluN2B receptors, the two predominant NMDAR subtypes in the adult brain, share similar allosteric transitions. Here, combining functional and structural interrogation, we reveal that GluN2A and GluN2B receptors utilize different long-distance allosteric mechanisms involving distinct subunit-subunit interfaces and molecular rearrangements. NMDARs have thus evolved multiple levels of subunit-specific allosteric control over their transmembrane ion channel pore. Our results uncover an unsuspected diversity in NMDAR molecular mechanisms with important implications for receptor physiology and precision drug development. NMDA receptors are glutamate-gated ion channels essential for synapse maturation and plasticity. Here the authors show that GluN2A and GluN2B NMDA receptors — the two principal subtypes NMDARs in the adult CNS — operate through distinct long range allosteric mechanisms.
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Affiliation(s)
- Meilin Tian
- Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, Université PSL, CNRS, INSERM, Paris, France
| | - David Stroebel
- Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, Université PSL, CNRS, INSERM, Paris, France
| | - Laura Piot
- Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, Université PSL, CNRS, INSERM, Paris, France
| | - Mélissa David
- Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, Université PSL, CNRS, INSERM, Paris, France
| | - Shixin Ye
- Unité INSERM U1195, Hôpital de Bicêtre, Université Paris-Saclay, Paris, Le Kremlin-Bicêtre, France.
| | - Pierre Paoletti
- Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, Université PSL, CNRS, INSERM, Paris, France.
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27
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Geoffroy C, Paoletti P, Mony L. Positive allosteric modulation of NMDA receptors: mechanisms, physiological impact and therapeutic potential. J Physiol 2021; 600:233-259. [PMID: 34339523 DOI: 10.1113/jp280875] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 07/28/2021] [Indexed: 12/21/2022] Open
Abstract
NMDA receptors (NMDARs) are glutamate-gated ion channels that play key roles in synaptic transmission and plasticity. Both hyper- and hypo-activation of NMDARs are deleterious to neuronal function. In particular, NMDAR hypofunction is involved in a wide range of neurological and psychiatric conditions like schizophrenia, intellectual disability, age-dependent cognitive decline, or Alzheimer's disease. While early medicinal chemistry efforts were mostly focused on the development of NMDAR antagonists, the last 10 years have seen a boom in the development of NMDAR positive allosteric modulators (PAMs). Here we review the currently developed NMDAR PAMs, their pharmacological profiles and mechanisms of action, as well as their physiological effects in healthy animals and animal models of NMDAR hypofunction. In light of the complexity of physiological outcomes of NMDAR PAMs in vivo, we discuss the remaining challenges and questions that need to be addressed to better grasp and predict the therapeutic potential of NMDAR positive allosteric modulation.
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Affiliation(s)
- Chloé Geoffroy
- Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, Université PSL, CNRS, INSERM, Paris, France
| | - Pierre Paoletti
- Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, Université PSL, CNRS, INSERM, Paris, France
| | - Laetitia Mony
- Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, Université PSL, CNRS, INSERM, Paris, France
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28
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Regulation of the NMDA receptor by its cytoplasmic domains: (How) is the tail wagging the dog? Neuropharmacology 2021; 195:108634. [PMID: 34097949 DOI: 10.1016/j.neuropharm.2021.108634] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 05/20/2021] [Accepted: 05/31/2021] [Indexed: 12/18/2022]
Abstract
Excitatory neurotransmission mediated by N-methyl-d-aspartate receptors (NMDARs) is critical for synapse development, function, and plasticity in the brain. NMDARs are tetra-heteromeric cation-channels that mediate synaptic transmission and plasticity. Extensive human studies show the existence of genetic variants in NMDAR subunits genes (GRIN genes) that are associated with neurodevelopmental and neuropsychiatric disorders, including autism spectrum disorders (ASD), epilepsy (EP), intellectual disability (ID), attention deficit hyperactivity disorder (ADHD), and schizophrenia (SCZ). NMDAR subunits have a unique modular architecture with four semiautonomous domains. Here we focus on the carboxyl terminal domain (CTD), also known as the intracellular C-tail, which varies in length among the glutamate receptor subunits and is the most diverse domain in terms of amino acid sequence. The CTD shows no sequence homology to any known proteins but encodes short docking motifs for intracellular binding proteins and covalent modifications. Our review will discuss the many important functions of the CTD in regulating NMDA membrane and synaptic targeting, stabilization, degradation targeting, allosteric modulation and metabotropic signaling of the receptor. This article is part of the special issue on 'Glutamate Receptors - NMDA Receptors'.
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29
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AMPA and NMDA Receptor Trafficking at Cocaine-Generated Synapses. J Neurosci 2021; 41:1996-2011. [PMID: 33436529 DOI: 10.1523/jneurosci.1918-20.2021] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 12/24/2020] [Accepted: 01/04/2021] [Indexed: 11/21/2022] Open
Abstract
Cocaine experience generates AMPA receptor (AMPAR)-silent synapses in the nucleus accumbens (NAc), which are thought to be new synaptic contacts enriched in GluN2B-containing NMDA receptors (NMDARs). After drug withdrawal, some of these synapses mature by recruiting AMPARs, strengthening the newly established synaptic transmission. Silent synapse generation and maturation are two consecutive cellular steps through which NAc circuits are profoundly remodeled to promote cue-induced cocaine seeking after drug withdrawal. However, the basic cellular processes that mediate these two critical steps remains underexplored. Using a combination of electrophysiology, viral-mediated gene transfer, and confocal imaging in male rats as well as knock-in (KI) mice of both sexes, our current study characterized the dynamic roles played by AMPARs and NMDARs in generation and maturation of silent synapses on NAc medium spiny neurons after cocaine self-administration and withdrawal. We report that cocaine-induced generation of silent synapses not only required synaptic insertion of GluN2B-containing NMDARs, but also, counterintuitively, involved insertion of AMPARs, which subsequently internalized, resulting in the AMPAR-silent state on withdrawal day 1. Furthermore, GluN2B NMDARs functioned to maintain these cocaine-generated synapses in the AMPAR-silent state during drug withdrawal, until they were replaced by nonGluN2B NMDARs, a switch that allowed AMPAR recruitment and maturation of silent synapses. These results reveal dynamic interactions between AMPARs and NMDARs during the generation and maturation of silent synapses after cocaine experience and provide a mechanistic basis through which new synaptic contacts and possibly new neural network patterns created by these synapses can be manipulated for therapeutic benefit.SIGNIFICANCE STATEMENT Studies over the past decade reveal a critical role of AMPA receptor-silent, NMDA receptor-containing synapses in forming cocaine-related memories that drive cocaine relapse. However, it remains incompletely understood how AMPA and NMDA receptors traffic at these synapses during their generation and maturation. The current study characterizes a two-step AMPA receptor trafficking cascade that contributes to the generation of silent synapses in response to cocaine experience, and a two-step NMDA receptor trafficking cascade that contributes to the maturation of these synapses after cocaine withdrawal. These results depict a highly regulated cellular procedure through which nascent glutamatergic synapses are generated in the adult brain after drug experience and provide significant insight into the roles of glutamate receptors in synapse formation and maturation.
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Wright WJ, Dong Y. Psychostimulant-Induced Adaptations in Nucleus Accumbens Glutamatergic Transmission. Cold Spring Harb Perspect Med 2020; 10:cshperspect.a039255. [PMID: 31964644 DOI: 10.1101/cshperspect.a039255] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Carrying different aspects of emotional and motivational signals, glutamatergic synaptic projections from multiple limbic and paralimbic brain regions converge to the nucleus accumbens (NAc), in which these arousing signals are processed and prioritized for behavioral output. In animal models of drug addiction, some key drug-induced alterations at NAc glutamatergic synapses underlie important cellular and circuit mechanisms that promote subsequent drug taking, seeking, and relapse. With the focus of cocaine, we review changes at NAc glutamatergic synapses that occur after different drug procedures and abstinence durations, and the behavioral impact of these changes.
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Affiliation(s)
- William J Wright
- Department of Neuroscience, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
| | - Yan Dong
- Department of Neuroscience, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
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31
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Posada-Duque RA, Cardona-Gómez GP. CDK5 Targeting as a Therapy for Recovering Neurovascular Unit Integrity in Alzheimer's Disease. J Alzheimers Dis 2020; 82:S141-S161. [PMID: 33016916 DOI: 10.3233/jad-200730] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The neurovascular unit (NVU) is responsible for synchronizing the energetic demand, vasodynamic changes, and neurochemical and electrical function of the brain through a closed and interdependent interaction of cell components conforming to brain tissue. In this review, we will focus on cyclin-dependent kinase 5 (CDK5) as a molecular pivot, which plays a crucial role in the healthy function of neurons, astrocytes, and the endothelium and is implicated in the cross-talk of cellular adhesion signaling, ion transmission, and cytoskeletal remodeling, thus allowing the individual and interconnected homeostasis of cerebral parenchyma. Then, we discuss how CDK5 overactivation affects the integrity of the NVU in Alzheimer's disease (AD) and cognitive impairment; we emphasize how CDK5 is involved in the excitotoxicity spreading of glutamate and Ca2+ imbalance under acute and chronic injury. Additionally, we present pharmacological and gene therapy strategies for producing partial depletion of CDK5 activity on neurons, astrocytes, or endothelium to recover neuroplasticity and neurotransmission, suggesting that the NVU should be the targeted tissue unit in protective strategies. Finally, we conclude that CDK5 could be effective due to its intervention on astrocytes by its end feet on the endothelium and neurons, acting as an intermediary cell between systemic and central communication in the brain. This review provides integrated guidance regarding the pathogenesis of and potential repair strategies for AD.
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Affiliation(s)
- Rafael Andrés Posada-Duque
- Cellular and Molecular Neurobiology Area, Group of Neuroscience of Antioquia, SIU, University of Antioquia, Medellín, Colombia.,Institute of Biology, Faculty of Exact and Natural Sciences, University of Antioquia, Medellín, Colombia
| | - Gloria Patricia Cardona-Gómez
- Cellular and Molecular Neurobiology Area, Group of Neuroscience of Antioquia, SIU, University of Antioquia, Medellín, Colombia
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32
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Wang Y, Zhao J, Guo FL, Gao X, Xie X, Liu S, Yang X, Yang X, Zhang L, Ye Y, Fan L, Wang J. Metformin Ameliorates Synaptic Defects in a Mouse Model of AD by Inhibiting Cdk5 Activity. Front Cell Neurosci 2020; 14:170. [PMID: 32670025 PMCID: PMC7327108 DOI: 10.3389/fncel.2020.00170] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 05/20/2020] [Indexed: 12/13/2022] Open
Abstract
Cyclin-dependent kinase 5 (Cdk5) is a serine/threonine kinase that is activated by the neuron-specific activators p35/p39 and plays important roles in neuronal development, synaptic plasticity, and cognitive behavior. However, the proteolytic cleavage of p35 to p25 leads to prolonged and aberrant Cdk5 activation and results in synaptic depression, highly mimicking the early pathology of Alzheimer’s disease (AD). Therefore, Cdk5 inhibition is a potential promising strategy for AD drug development. Here in the present study, we showed that metformin, the most widely used drug for type 2 diabetes, suppressed Cdk5 hyper-activation and Cdk5-dependent tau hyper-phosphorylation in the APP/PS1 mouse hippocampus. We also identified the underlying molecular and cellular mechanism that metformin prevented Cdk5 hyper-activation by inhibiting the calpain-dependent cleavage of p35 into p25. Moreover, chronic metformin treatment rescued the core phenotypes in APP/PS1 mice as evidenced by restored spine density, surface GluA1 trafficking, Long-term potentiation (LTP) expression, and spatial memory. Altogether our study discovered an unidentified role of metformin in suppressing Cdk5 hyper-activation and thus preventing AD pathogenesis and suggested that metformin is a potential promising AD therapeutic drug.
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Affiliation(s)
- YaLi Wang
- Key Laboratory for the Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, China
| | - JianHua Zhao
- Henan Key Laboratory of Neurorestoratology, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Fang-Li Guo
- Department of Neurology, Anyang District Hospital of Puyang City, Anyang, China
| | - XiaHuan Gao
- Department of Pathology, People's Hospital of Tongchuan, Tongchuan, China
| | - Xine Xie
- Department of Neurology, The Second Hospital of Jinhua, Jinhua, China
| | - ShouQing Liu
- Department of Neurology, The Second Hospital of Jinhua, Jinhua, China
| | - Xin Yang
- Department of Physiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - XinFeng Yang
- Department of Pathophysiology, Xinxiang Medical University, Xinxiang, China
| | - LuYi Zhang
- Department of Pathophysiology, Xinxiang Medical University, Xinxiang, China
| | - YuXiao Ye
- Department of Pathophysiology, Xinxiang Medical University, Xinxiang, China
| | - LiBing Fan
- Department of Pathophysiology, Xinxiang Medical University, Xinxiang, China
| | - JianGang Wang
- Key Laboratory for the Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, China.,Henan Key Laboratory of Neurorestoratology, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China.,Department of Pathophysiology, Xinxiang Medical University, Xinxiang, China.,Henan Key Laboratory of Biological Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang Medical University, Xinxiang, China
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Allnutt AB, Waters AK, Kesari S, Yenugonda VM. Physiological and Pathological Roles of Cdk5: Potential Directions for Therapeutic Targeting in Neurodegenerative Disease. ACS Chem Neurosci 2020; 11:1218-1230. [PMID: 32286796 DOI: 10.1021/acschemneuro.0c00096] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Cyclin-dependent kinase 5 (Cdk5) is a proline-directed serine (ser)/threonine (Thr) kinase that has been demonstrated to be one of the most functionally diverse kinases within neurons. Cdk5 is regulated via binding with its neuron-specific regulatory subunits, p35 or p39. Cdk5-p35 activity is critical for a variety of developmental and cellular processes in the brain, including neuron migration, memory formation, microtubule regulation, and cell cycle suppression. Aberrant activation of Cdk5 via the truncated p35 byproduct, p25, is implicated in the pathogenesis of several neurodegenerative diseases. The present review highlights the importance of Cdk5 activity and function in the brain and demonstrates how deregulation of Cdk5 can contribute to the development of neurodegenerative conditions such as Alzheimer's and Parkinson's disease. Additionally, we cover past drug discovery attempts at inhibiting Cdk5-p25 activity and discuss which types of targeting strategies may prove to be the most successful moving forward.
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Kiss E, Groeneweg F, Gorgas K, Schlicksupp A, Kins S, Kirsch J, Kuhse J. Amyloid-β Fosters p35/CDK5 Signaling Contributing to Changes of Inhibitory Synapses in Early Stages of Cerebral Amyloidosis. J Alzheimers Dis 2020; 74:1167-1187. [DOI: 10.3233/jad-190976] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Eva Kiss
- Institute of Anatomy and Cell Biology, University of Heidelberg, Heidelberg, Germany
- Department of Cellular and Molecular Biology, “Emil Palade” University of Medicine, Pharmacy, Science and Technology of Târgu Mureş, Târgu Mureş, Romania
| | - Femke Groeneweg
- Institute of Anatomy and Cell Biology, University of Heidelberg, Heidelberg, Germany
| | - Karin Gorgas
- Institute of Anatomy and Cell Biology, University of Heidelberg, Heidelberg, Germany
| | - Andrea Schlicksupp
- Institute of Anatomy and Cell Biology, University of Heidelberg, Heidelberg, Germany
| | - Stefan Kins
- Department of Human Biology and Human Genetics, University of Kaiserslautern, Kaiserslautern, Germany
| | - Joachim Kirsch
- Institute of Anatomy and Cell Biology, University of Heidelberg, Heidelberg, Germany
| | - Jochen Kuhse
- Institute of Anatomy and Cell Biology, University of Heidelberg, Heidelberg, Germany
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Zhou J, Chow HM, Liu Y, Wu D, Shi M, Li J, Wen L, Gao Y, Chen G, Zhuang K, Lin H, Zhang G, Xie W, Li H, Leng L, Wang M, Zheng N, Sun H, Zhao Y, Zhang Y, Xue M, Huang TY, Bu G, Xu H, Yuan Z, Herrup K, Zhang J. Cyclin-Dependent Kinase 5-Dependent BAG3 Degradation Modulates Synaptic Protein Turnover. Biol Psychiatry 2020; 87:756-769. [PMID: 31955914 DOI: 10.1016/j.biopsych.2019.11.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 11/07/2019] [Accepted: 11/08/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND Synaptic protein dyshomeostasis and functional loss is an early invariant feature of Alzheimer's disease (AD), yet the unifying etiological pathway remains largely unknown. Knowing that cyclin-dependent kinase 5 (CDK5) plays critical roles in synaptic formation and degeneration, its phosphorylation targets were reexamined in search of candidates with direct global impacts on synaptic protein dynamics, and the associated regulatory network was also analyzed. METHODS Quantitative phosphoproteomics and bioinformatics analyses were performed to identify top-ranked candidates. A series of biochemical assays was used to investigate the associated regulatory signaling networks. Histological, electrochemical, and behavioral assays were performed in conditional knockout, small hairpin RNA-mediated knockdown, and AD-related mice models to evaluate the relevance of CDK5 to synaptic homeostasis and functions. RESULTS Among candidates with known implications in synaptic modulations, BAG3 ranked the highest. CDK5-mediated phosphorylation on S297/S291 (mouse/human) destabilized BAG3. Loss of BAG3 unleashed the selective protein degradative function of the HSP70 machinery. In neurons, this resulted in enhanced degradation of a number of glutamatergic synaptic proteins. Conditional neuronal knockout of Bag3 in vivo led to impairment of learning and memory functions. In human AD and related mouse models, aberrant CDK5-mediated loss of BAG3 yielded similar effects on synaptic homeostasis. Detrimental effects of BAG3 loss on learning and memory functions were confirmed in these mice, and such effects were reversed by ectopic BAG3 reexpression. CONCLUSIONS Our results highlight that the neuronal CDK5-BAG3-HSP70 signaling axis plays a critical role in modulating synaptic homeostasis. Dysregulation of the signaling pathway directly contributes to synaptic dysfunction and AD pathogenesis.
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Affiliation(s)
- Jiechao Zhou
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Hei-Man Chow
- School of Life Sciences, The Chinese University of Hong Kong, Sha Tin, Hong Kong.
| | - Yan Liu
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China; Department of Traditional Chinese Medicine, Medical College, Xiamen University, Xiamen, Fujian, China
| | - Di Wu
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Meng Shi
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Jieyin Li
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Lei Wen
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China; Department of Traditional Chinese Medicine, Medical College, Xiamen University, Xiamen, Fujian, China
| | - Yuehong Gao
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Guimiao Chen
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Kai Zhuang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Hui Lin
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Guanyun Zhang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Wenting Xie
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Huifang Li
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Lige Leng
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Mengdan Wang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Naizhen Zheng
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Hao Sun
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Yingjun Zhao
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California
| | - Yunwu Zhang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Maoqiang Xue
- Department of Basic Medical Science, Medical College, Xiamen University, Xiamen, Fujian, China
| | - Timothy Y Huang
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California
| | - Guojun Bu
- Department of Neuroscience, Mayo Clinic, Jacksonville, Florida
| | - Huaxi Xu
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California
| | - Zengqiang Yuan
- The Brain Science Center, Beijing Institute of Basic Medical Sciences, Beijing, China
| | - Karl Herrup
- Department of Neurobiology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Jie Zhang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, School of Medicine, Xiamen University, Xiamen, Fujian, China.
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Zhang B, Fang W, Ma W, Xue F, Ai H, Lu W. Differential Roles of GluN2B in Two Types of Chemical-induced Long Term Potentiation-mediated Phosphorylation Regulation of GluA1 at Serine 845 in Hippocampal Slices. Neuroscience 2020; 433:144-155. [PMID: 32194228 DOI: 10.1016/j.neuroscience.2020.03.012] [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: 11/19/2019] [Revised: 03/04/2020] [Accepted: 03/07/2020] [Indexed: 01/25/2023]
Abstract
Synaptic plasticity, such as long term potentiation (LTP) and long term depression (LTD), underlies the cellular mechanism of learning and memory. Chemical-induced LTP (cLTP), which facilitates biochemical analysis of molecular changes in brain slices or neuronal cultures, has been accepted as an in vitro model to explore synaptic plasticity. cLTP, by either forskolin and rolipram (F&R) or glycine, is thought to be dependent on NMDA receptor. However, subunit-specific dependence and regulation of the NMDA receptor in cLTP remain poorly understood. In the present study, we found that phosphorylation level of GluN2B at tyrosine 1472 was modulated by F&R-induced LTP but not by glycine-induced LTP in hippocampal slices. Furthermore, an increased phosphorylation level of GluA1 at serine 845 by F&R-induced LTP rather than glycine-induced LTP was dependent on the activation of GluN2B, which is supported by the results from GluN2B antagonists, small interfering peptide and CRISPR-Cas9-mediated knock out of GluN2B. Taken together, we reveal the significant role of GluN2B in F&R-induced LTP, uncovering the role of GluN2B subunit of NMDA receptor in a specified cLTP.
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Affiliation(s)
- Bin Zhang
- Zhejiang Key Laboratory of Organ Development and Regeneration, Institute of Life Science, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China
| | - Weiqing Fang
- Department of Pharmacy, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310006, China
| | - Wu Ma
- Zhejiang Key Laboratory of Organ Development and Regeneration, Institute of Life Science, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China
| | - Fusheng Xue
- Zhejiang Key Laboratory of Organ Development and Regeneration, Institute of Life Science, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China
| | - Heng Ai
- Department of Physiology, Hangzhou Medical College, Hangzhou, Zhejiang 310053, China
| | - Wen Lu
- Department of Biochemistry and Molecular Biology, Hainan Medical University, Haikou, Hainan 571199, China; Key Laboratory of Emergency and Trauma of Ministry of Education, Hainan Medical University, Haikou 571199, China.
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37
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Talebian A, Henkemeyer M. EphB2 receptor cell-autonomous forward signaling mediates auditory memory recall and learning-driven spinogenesis. Commun Biol 2019; 2:372. [PMID: 31633063 PMCID: PMC6789002 DOI: 10.1038/s42003-019-0625-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 09/16/2019] [Indexed: 01/09/2023] Open
Abstract
While ephrin-B ligands and EphB receptors are expressed to high levels in the learning centers of the brain, it remains largely unknown how their trans-synaptic interactions contribute to memory. We find that EphB2 forward signaling is needed for contextual and sound-evoked memory recall and that constitutive over-activation of the receptor's intracellular tyrosine kinase domain results in enhanced memory. Loss of EphB2 expression does not affect the number of neurons activated following encoding, although a reduction of neurons activated after the sound-cued retrieval test was detected in the auditory cortex and hippocampal CA1. Further, spine density and maturation was reduced in the auditory cortex of mutants especially in the neurons that were dual-activated during both encoding and retrieval. Our data demonstrates that trans-synaptic ephrin-B-EphB2 interactions and forward signaling facilitate neural activation and structural plasticity in learning-associated neurons involved in the generation of memories.
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Affiliation(s)
- Asghar Talebian
- Department of Neuroscience and Kent Waldrep Center for Basic Research on Nerve Growth and Regeneration, University of Texas Southwestern Medical Center, Dallas, TX 75390 USA
| | - Mark Henkemeyer
- Department of Neuroscience and Kent Waldrep Center for Basic Research on Nerve Growth and Regeneration, University of Texas Southwestern Medical Center, Dallas, TX 75390 USA
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38
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Preso regulates NMDA receptor-mediated excitotoxicity via modulating nitric oxide and calcium responses after traumatic brain injury. Cell Death Dis 2019; 10:496. [PMID: 31235685 PMCID: PMC6591282 DOI: 10.1038/s41419-019-1731-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 05/25/2019] [Accepted: 06/04/2019] [Indexed: 12/13/2022]
Abstract
Traumatic brain injury (TBI) has become a major health concern worldwide, and the poor outcome of TBI increases the need for therapeutic improvement. Secondary injuries following TBI, including excitotoxicity, lead to synaptic dysfunction and provide potential targets for intervention. Postsynaptic scaffold proteins, which are involved in the regulation of excitotoxicity after neuronal injury, play a crucial role in modulating synaptic function. Therefore, exploring the role of postsynaptic scaffold proteins in TBI might uncover new treatments. In this study, we demonstrated that downregulated expression of the postsynaptic scaffold protein Preso protects against neuronal injury after TBI in vitro and in vivo, and these effects are related to the inhibition of N-methyl-D-aspartate receptor (NMDAR) function. Further study showed that Preso facilitates signaling from NMDAR to nitric oxide (NO) and calcium (Ca2+) responses. First, the complex constituting NMDAR, postsynaptic density-95 (PSD-95), and neuronal nitric oxide synthase (nNOS) was shown to be involved in the Preso regulation of the NO response. Uncoupling the linkage between Preso and PSD-95 attenuated the stability of this complex and suppressed the regulatory effect of Preso on the NO response. In addition, phosphorylation of NMDAR by cyclin-dependent kinase 5 (CDK5) was shown to be responsible for the Preso-mediated Ca2+ response, which was dependent on the interaction between Preso and CDK5. These results suggested that the association of Preso with NMDAR signaling can serve as a target for neuroprotection against TBI.
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Li J, Guo M, Liu Y, Wu G, Miao L, Zhang J, Zuo Z, Li Y. Both GSK-3β/CRMP2 and CDK5/CRMP2 pathways participate in the protection of dexmedetomidine against propofol-induced learning and memory impairment in neonatal rats. Toxicol Sci 2019; 171:193-210. [PMID: 31187143 DOI: 10.1093/toxsci/kfz135] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 05/17/2019] [Accepted: 05/29/2019] [Indexed: 11/13/2022] Open
Abstract
Dexmedetomidine has been reported to ameliorate propofol-induced neurotoxicity in neonatal animals. However, the underlying mechanism is still undetermined. Glycogen synthase kinase-3β (GSK-3β), cycline dependent kinase-5 (CDK5) and Rho-kinase (RhoA) pathways play critical roles in neuronal development. The present study is to investigate whether GSK-3β, CDK5 and RhoA pathways are involved in the neuroprotection of dexmedetomidine. Seven-day-old (P7) Sprague-Dawley rats were anesthetized with propofol for 6 h. Dexmedetomidine at various concentrations were administered before propofol exposure. Neuroapoptosis, the neuronal proliferation and the level of neurotransmitter in the hippocampus were evaluated. The effects of GSK-3β inhibitor SB415286, CDK5 inhibitor roscovitine or RhoA inhibitor Y276321 on propofol-induced neurotoxicity were assessed. Propofol induced apoptosis in the hippocampal neurons and astrocytes, inhibited neuronal proliferation in the DG region, down-regulated the level of γ-aminobutyric acid (GABA) and glutamate in the hippocampus, and impaired long-term cognitive function. These harmful effects were reduced by pretreatment with 50 μg·kg-1 dexmedetomidine. Moreover, propofol activated GSK-3β and CDK5 pathways, but not RhoA pathway, by reducing the phosphorylation of GSK-3β (ser 9), increasing the expression of CDK5 activator P25 and increasing the phosphorylation of their target sites on CRMP2 shortly after exposure. These effects were reversed by pretreatment with 50 μg·kg-1 dexmedetomidine. Furthermore, SB415286 and roscovitine, not Y276321, attenuated the propofol-induced neuroapoptosis, brain cell proliferation inhibition, GABA and glutamate downregulation, and learning and memory dysfunction. Our results indicate that dexmedetomidine reduces propofol-induced neurotoxicity and neurocognitive impairment via inhibiting activation of GSK-3β/CRMP2 and CDK5/CRMP2 pathways in the hippocampus of neonatal rats.
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Affiliation(s)
- Junhua Li
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Laboratory of RNA and Major Diseases of Brain and Hearts, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Minyan Guo
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Laboratory of RNA and Major Diseases of Brain and Hearts, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yafang Liu
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Laboratory of RNA and Major Diseases of Brain and Hearts, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Guiyun Wu
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Liping Miao
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jing Zhang
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zhiyi Zuo
- Department of Anesthesiology, University of Virginia Health System, Charlottesville, Virginia, 22908-0710, USA
| | - Yujuan Li
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Laboratory of RNA and Major Diseases of Brain and Hearts, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
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40
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Smith‐Dijak AI, Sepers MD, Raymond LA. Alterations in synaptic function and plasticity in Huntington disease. J Neurochem 2019; 150:346-365. [DOI: 10.1111/jnc.14723] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 03/28/2019] [Accepted: 05/08/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Amy I. Smith‐Dijak
- Graduate Program in Neuroscience the University of British Columbia Vancouver British Columbia Canada
- Department of Psychiatry and Djavad Mowafaghian Centre for Brain Health the University of British Columbia Vancouver British Columbia Canada
| | - Marja D. Sepers
- Department of Psychiatry and Djavad Mowafaghian Centre for Brain Health the University of British Columbia Vancouver British Columbia Canada
| | - Lynn A. Raymond
- Department of Psychiatry and Djavad Mowafaghian Centre for Brain Health the University of British Columbia Vancouver British Columbia Canada
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41
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Zeb A, Kim D, Alam SI, Son M, Kumar R, Rampogu S, Parameswaran S, Shelake RM, Rana RM, Parate S, Kim JY, Lee KW. Computational Simulations Identify Pyrrolidine-2,3-Dione Derivatives as Novel Inhibitors of Cdk5/p25 Complex to Attenuate Alzheimer's Pathology. J Clin Med 2019; 8:E746. [PMID: 31137734 PMCID: PMC6572193 DOI: 10.3390/jcm8050746] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 05/21/2019] [Accepted: 05/22/2019] [Indexed: 12/21/2022] Open
Abstract
: Mechanistically, neurotoxic insults provoke Ca2+-mediated calpain activation, which cleaves the cytoplasmic region of membrane-embedded p35 and produces its truncated form p25. Upon physical interaction, cyclin-dependent kinase 5 (Cdk5) and p25 forms hyperactivated Cdk5/p25 complex and causes severe neuropathological aberrations including hyperphosphorylated tau-mediated neurofibrillary tangles formation, Alzheimer's symptoms, and neuronal death. Therefore, the inhibition of Cdk5/p25 complex may relieve p-tau-mediated Alzheimer's pathology. Herein, computational simulations have identified pyrrolidine-2,3-dione derivatives as novel inhibitors of Cdk5/p25 complex. A ligand-based pharmacophore was designed and employed as 3D query to retrieve drug-like molecules from chemical databases. By molecular docking, drug-like molecules obtaining dock score > 67.67 (Goldcore of the reference compound) were identified. Molecular dynamics simulation and binding free energy calculation retrieved four pyrrolidine-2,3-dione derivatives as novel candidate inhibitors of Cdk5/p25. The root means square deviation of Cdk5/p25 in complex with candidate inhibitors obtained an average value of ~2.15 Å during the 30 ns simulation period. Molecular interactions analysis suggested that each inhibitor occupied the ATP-binding site of Cdk5/p25 and formed stable interactions. Finally, the binding free energy estimation suggested that each inhibitor had lowest binding energy than the reference compound (-113.10 kJ/mol) to recapitulate their strong binding with Cdk5/p25. Overall, these inhibitors could mitigate tau-mediated Alzheimer's phenotype.
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Affiliation(s)
- Amir Zeb
- Division of Life Science, Division of Applied Life Science (BK21 Plus), Research Institute of Natural Science (RINS), Gyeongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Korea.
| | - Donghwan Kim
- Division of Life Science, Division of Applied Life Science (BK21 Plus), Research Institute of Natural Science (RINS), Gyeongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Korea.
| | - Sayed Ibrar Alam
- Division of Life Sciences and Applied Life Science (BK 21plus), College of Natural Sciences, Gyeongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Korea.
| | - Minky Son
- Division of Life Science, Division of Applied Life Science (BK21 Plus), Research Institute of Natural Science (RINS), Gyeongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Korea.
| | - Raj Kumar
- Institute of Chemical Processes (ICP), Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
| | - Shailima Rampogu
- Division of Life Science, Division of Applied Life Science (BK21 Plus), Research Institute of Natural Science (RINS), Gyeongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Korea.
| | - Saravanan Parameswaran
- Division of Life Science, Division of Applied Life Science (BK21 Plus), Research Institute of Natural Science (RINS), Gyeongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Korea.
| | - Rahul Mahadev Shelake
- Division of Applied Life Sciences, Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Korea.
| | - Rabia Mukhtar Rana
- Division of Life Science, Division of Applied Life Science (BK21 Plus), Research Institute of Natural Science (RINS), Gyeongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Korea.
| | - Shraddha Parate
- Division of Life Science, Division of Applied Life Science (BK21 Plus), Research Institute of Natural Science (RINS), Gyeongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Korea.
| | - Jae-Yean Kim
- Division of Applied Life Sciences, Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Korea.
| | - Keun Woo Lee
- Division of Life Science, Division of Applied Life Science (BK21 Plus), Research Institute of Natural Science (RINS), Gyeongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Korea.
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Oxymatrine protects neonatal rat against hypoxic-ischemic brain damage via PI3K/Akt/GSK3β pathway. Life Sci 2019; 254:116444. [PMID: 31102745 DOI: 10.1016/j.lfs.2019.04.070] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 04/27/2019] [Accepted: 04/30/2019] [Indexed: 12/22/2022]
Abstract
AIMS In this study we aimed to explore the specific effect and mechanism of oxymatrine on neonatal rats hypoxic-ischemic brain damage. MATERIALS AND METHODS Hypoxia-ischemia damage model was built by ligaturing the left common carotid artery in 7-day-old rat. Rat pups in OMT group received intraperitoneal injection with oxymatrine (120 mg/kg). Oxygen glucose deprivation/reperfusion model was created in hippocampal neurons. Neurological behavioral, histopathological alteration, cell viability, intracellular Ca2+ concentration, MMP and cell apoptosis were used in damage evaluation. KEY FINDINGS The results shown that oxymatrine regulated brain damage and cell apoptosis by controlling NR2B-PI3K/Akt/GSK3β signaling pathway. SIGNIFICANCE Neonatal hypoxic-ischemic brain damage is a destructive injury that leading to death and detrimental neurological deficits. Oxymatrine is a natural alkaloid compound that can alleviate the ischemic cerebral infarction. In the study, 120 mg/kg oxymatrine decreased neuroethology damage and neuronal damage in the cerebral cortex and the hippocampus CA3. Moreover, 0.2, 1, 5 μg/ml oxymatrine improved cell survival, decreased cell apoptosis. The utilization of LY293004 (PI3K signaling pathway inhibitor) also supported that oxymatrine ameliorated neonatal hypoxic-ischemic brain damage and cell injury by controlling NR2B-PI3K/Akt/GSK3β signaling pathway.
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Migues PV, Wong J, Lyu J, Hardt O. NMDA receptor activity bidirectionally controls active decay of long-term spatial memory in the dorsal hippocampus. Hippocampus 2019; 29:883-888. [PMID: 31058409 DOI: 10.1002/hipo.23096] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 04/01/2019] [Accepted: 04/17/2019] [Indexed: 12/22/2022]
Abstract
The time-dependent forgetting of long-term spatial memories involves activation of NMDA receptors (NMDARs) in the hippocampus. Here, we tested whether NMDARs regulate memory persistence bidirectionally, decreasing or increasing the rate of forgetting. We found that blocking NMDAR activation with AP5 or the GluN2B-selective antagonist Ro25-6981 in the dorsal hippocampus (dHPC) prevented the natural forgetting of long-term memory for the locations of objects in an open field arena. In contrast, while enhancing NMDAR function with the partial agonist D-Cycloserine did not affect the speed of forgetting for these types of memories, infusing the NMDAR co-agonist D-Serine significantly shortened their persistence. These results suggest that NMDAR activity can modulate the speed of constitutive long-term memory decay in the dHPC and that regulating NMDAR expression and D-Serine availability could provide a mechanism to control the duration of long-term memory.
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Affiliation(s)
- Paola Virginia Migues
- Department of Psychology, Behavioural Neuroscience, McGill University, Montréal, Québec, Canada
| | - Jacinda Wong
- Department of Psychology, Behavioural Neuroscience, McGill University, Montréal, Québec, Canada
| | - Jeongho Lyu
- Department of Psychology, Behavioural Neuroscience, McGill University, Montréal, Québec, Canada
| | - Oliver Hardt
- Department of Psychology, Behavioural Neuroscience, McGill University, Montréal, Québec, Canada.,Centre for Discovery Brain Sciences, Simons Initiative for the Developing Brain, The University of Edinburgh, Scotland, UK
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44
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Sase AS, Lombroso SI, Santhumayor BA, Wood RR, Lim CJ, Neve RL, Heller EA. Sex-Specific Regulation of Fear Memory by Targeted Epigenetic Editing of Cdk5. Biol Psychiatry 2019; 85:623-634. [PMID: 30661667 DOI: 10.1016/j.biopsych.2018.11.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 10/29/2018] [Accepted: 11/15/2018] [Indexed: 10/27/2022]
Abstract
BACKGROUND Sex differences in the expression and prevalence of trauma- and stress-related disorders have led to a growing interest in the sex-specific molecular and epigenetic mechanisms underlying these diseases. Cyclin-dependent kinase 5 (CDK5) is known to underlie both fear memory and stress behavior in male mice. Given our recent finding that targeted histone acetylation of Cdk5 regulates stress responsivity in male mice, we hypothesized that such a mechanism may be functionally relevant in female mice as well. METHODS We applied epigenetic editing of Cdk5 in the hippocampus and examined the regulation of fear memory retrieval in male and female mice. Viral expression of zinc finger proteins targeting histone acetylation to the Cdk5 promoter was paired with a quantification of learning and memory of contextual fear conditioning, expression of CDK5, and enrichment of histone modifications of the Cdk5 gene. RESULTS We found that male mice exhibit stronger long-term memory retrieval than do female mice, and this finding was associated with male-specific epigenetic activation of hippocampal Cdk5 expression. Sex differences in behavior and epigenetic regulation of Cdk5 occurred after long-term, but not short-term, fear memory retrieval. Finally, targeted histone acetylation of hippocampal Cdk5 promoter attenuated fear memory retrieval and increased tau phosphorylation in female but not male mice. CONCLUSIONS Epigenetic editing uncovered a female-specific role of Cdk5 activation in attenuating fear memory retrieval. This finding may be attributed to CDK5 mediated hyperphosphorylation of tau only in the female hippocampus. Sex-specific epigenetic regulation of Cdk5 may reflect differences in the effect of CDK5 on downstream target proteins that regulate memory.
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Affiliation(s)
- Ajinkya S Sase
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Sonia I Lombroso
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Brandon A Santhumayor
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Rozalyn R Wood
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Carissa J Lim
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Rachael L Neve
- Gene Delivery Technology Core, Massachusetts General Hospital, Boston, Massachusetts
| | - Elizabeth A Heller
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, Pennsylvania; Penn Epigenetics Institute, University of Pennsylvania, Philadelphia, Pennsylvania.
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45
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Tripchlorolide May Improve Spatial Cognition Dysfunction and Synaptic Plasticity after Chronic Cerebral Hypoperfusion. Neural Plast 2019; 2019:2158285. [PMID: 30923551 PMCID: PMC6409048 DOI: 10.1155/2019/2158285] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 11/10/2018] [Accepted: 12/16/2018] [Indexed: 12/11/2022] Open
Abstract
Chronic cerebral hypoperfusion (CCH) is a common pathophysiological mechanism that underlies cognitive decline and degenerative processes in dementia and other neurodegenerative diseases. Low cerebral blood flow (CBF) during CCH leads to disturbances in the homeostasis of hemodynamics and energy metabolism, which in turn results in oxidative stress, astroglia overactivation, and synaptic protein downregulation. These events contribute to synaptic plasticity and cognitive dysfunction after CCH. Tripchlorolide (TRC) is an herbal compound with potent neuroprotective effects. The potential of TRC to improve CCH-induced cognitive impairment has not yet been determined. In the current study, we employed behavioral techniques, electrophysiology, Western blotting, immunofluorescence, and Golgi staining to investigate the effect of TRC on spatial learning and memory impairment and on synaptic plasticity changes in rats after CCH. Our findings showed that TRC could rescue CCH-induced spatial learning and memory dysfunction and improve long-term potentiation (LTP) disorders. We also found that TRC could prevent CCH-induced reductions in N-methyl-D-aspartic acid receptor 2B, synapsin I, and postsynaptic density protein 95 levels. Moreover, TRC upregulated cAMP-response element binding protein, which is an important transcription factor for synaptic proteins. TRC also prevented the reduction in dendritic spine density that is caused by CCH. However, sham rats treated with TRC did not show any improvement in cognition. Because CCH causes disturbances in brain energy homeostasis, TRC therapy may resolve this instability by correcting a variety of cognitive-related signaling pathways. However, for the normal brain, TRC treatment led to neither disturbance nor improvement in neural plasticity. Additionally, this treatment neither impaired nor further improved cognition. In conclusion, we found that TRC can improve spatial learning and memory, enhance synaptic plasticity, upregulate the expression of some synaptic proteins, and increase the density of dendritic spines. Our findings suggest that TRC may be beneficial in the treatment of cognitive impairment induced by CCH.
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46
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Takahashi M, Kobayashi Y, Ando K, Saito Y, Hisanaga SI. Cyclin-dependent kinase 5 promotes proteasomal degradation of the 5-HT 1A receptor via phosphorylation. Biochem Biophys Res Commun 2019; 510:370-375. [PMID: 30712943 DOI: 10.1016/j.bbrc.2019.01.093] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 01/18/2019] [Indexed: 11/30/2022]
Abstract
Serotonin (5-HT) is a major neurotransmitter in mammalian brains and is involved in brain development and psychiatric disorders. The 5-HT1A receptor (5-HT1AR) is a G-protein-coupled receptor (GPCR) associated with an inhibitory G-protein (Gi) with the widest and most abundant expression. It is not known; however, how expression or activity of 5-HTlAR is regulated. We studied here phosphorylation of 5-HT1AR by cyclin-dependent kinase 5 (Cdk5), a neuron-specific membrane-bound Ser/Thr kinase that is activated by binding of the p35 Cdk5 activator. 5-HT1AR was phosphorylated by the Cdk5-p35 complex at Thr314 in the third cytoplasmic loop. The phosphorylation stimulated the degradation of 5-HT1AR by the proteasome, resulting in neutralization of the inhibitory action of 5-HT1AR on intracellular cAMP concentration. These results suggest that Cdk5-p35 modulates 5-HT signaling through phosphorylation-dependent degradation of 5-HTlAR.
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Affiliation(s)
- Miyuki Takahashi
- Department of Biological Sciences, Tokyo Metropolitan University, Hachioji, Tokyo, 192-0397, Japan
| | - Yuki Kobayashi
- Graduate School Integrated Arts and Sciences, Hiroshima University, Hiroshima, 739-8521, Japan
| | - Kanae Ando
- Department of Biological Sciences, Tokyo Metropolitan University, Hachioji, Tokyo, 192-0397, Japan
| | - Yumiko Saito
- Graduate School Integrated Arts and Sciences, Hiroshima University, Hiroshima, 739-8521, Japan
| | - Shin-Ichi Hisanaga
- Department of Biological Sciences, Tokyo Metropolitan University, Hachioji, Tokyo, 192-0397, Japan.
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47
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Xu Y, Yang Y, Sun J, Zhang Y, Luo T, Li B, Jiang Y, Shi Y, Le G. Dietary methionine restriction ameliorates the impairment of learning and memory function induced by obesity in mice. Food Funct 2019; 10:1411-1425. [DOI: 10.1039/c8fo01922c] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Dietary methionine restriction improves impairment of learning and memory function induced by obesity, likely by increasing H2S production.
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Affiliation(s)
- Yuncong Xu
- State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi
- China
- Center for Food Nutrition and Functional Food Engineering
| | - Yuhui Yang
- State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi
- China
- Center for Food Nutrition and Functional Food Engineering
| | - Jin Sun
- State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi
- China
- Center for Food Nutrition and Functional Food Engineering
| | - Yuanyuan Zhang
- Center for Food Nutrition and Functional Food Engineering
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Tingyu Luo
- Center for Food Nutrition and Functional Food Engineering
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Bowen Li
- Center for Food Nutrition and Functional Food Engineering
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Yuge Jiang
- State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi
- China
- Center for Food Nutrition and Functional Food Engineering
| | - Yonghui Shi
- State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi
- China
- Center for Food Nutrition and Functional Food Engineering
| | - Guowei Le
- State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi
- China
- Center for Food Nutrition and Functional Food Engineering
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48
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Hernandez A, Tan C, Plattner F, Logsdon AF, Pozo K, Yousuf MA, Singh T, Turner RC, Lucke-Wold BP, Huber JD, Rosen CL, Bibb JA. Exposure to mild blast forces induces neuropathological effects, neurophysiological deficits and biochemical changes. Mol Brain 2018; 11:64. [PMID: 30409147 PMCID: PMC6225689 DOI: 10.1186/s13041-018-0408-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 10/16/2018] [Indexed: 01/28/2023] Open
Abstract
Direct or indirect exposure to an explosion can induce traumatic brain injury (TBI) of various severity levels. Primary TBI from blast exposure is commonly characterized by internal injuries, such as vascular damage, neuronal injury, and contusion, without external injuries. Current animal models of blast-induced TBI (bTBI) have helped to understand the deleterious effects of moderate to severe blast forces. However, the neurological effects of mild blast forces remain poorly characterized. Here, we investigated the effects caused by mild blast forces combining neuropathological, histological, biochemical and neurophysiological analysis. For this purpose, we employed a rodent blast TBI model with blast forces below the level that causes macroscopic neuropathological changes. We found that mild blast forces induced neuroinflammation in cerebral cortex, striatum and hippocampus. Moreover, mild blast triggered microvascular damage and axonal injury. Furthermore, mild blast caused deficits in hippocampal short-term plasticity and synaptic excitability, but no impairments in long-term potentiation. Finally, mild blast exposure induced proteolytic cleavage of spectrin and the cyclin-dependent kinase 5 activator, p35 in hippocampus. Together, these findings show that mild blast forces can cause aberrant neurological changes that critically impact neuronal functions. These results are consistent with the idea that mild blast forces may induce subclinical pathophysiological changes that may contribute to neurological and psychiatric disorders.
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Affiliation(s)
- Adan Hernandez
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Chunfeng Tan
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Florian Plattner
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA.,Center for Translational Neurodegeneration Research, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Aric F Logsdon
- Department of Neurosurgery, West Virginia University School of Medicine, Morgantown, WV, 26506-9183, USA
| | - Karine Pozo
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Mohammad A Yousuf
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Tanvir Singh
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Ryan C Turner
- Department of Neurosurgery, West Virginia University School of Medicine, Morgantown, WV, 26506-9183, USA
| | - Brandon P Lucke-Wold
- Department of Neurosurgery, West Virginia University School of Medicine, Morgantown, WV, 26506-9183, USA
| | - Jason D Huber
- Department of Basic Pharmaceutical Sciences, West Virginia University School of Medicine, Morgantown, WV, 26506-9530, USA
| | - Charles L Rosen
- Department of Neurosurgery, West Virginia University School of Medicine, Morgantown, WV, 26506-9183, USA
| | - James A Bibb
- Departments of Surgery, Neurobiology, and Neurology, The University of Alabama at Birmingham Medical Center, 1720 2nd Ave S, THT 1052, Birmingham, AL, 35294, USA.
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49
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Santora VJ, Almos TA, Barido R, Basinger J, Bellows CL, Bookser BC, Breitenbucher JG, Broadbent NJ, Cabebe C, Chai CK, Chen M, Chow S, Chung DM, Crickard L, Danks AM, Freestone GC, Gitnick D, Gupta V, Hoffmaster C, Hudson AR, Kaplan AP, Kennedy MR, Lee D, Limberis J, Ly K, Mak CC, Masatsugu B, Morse AC, Na J, Neul D, Nikpur J, Peters M, Petroski RE, Renick J, Sebring K, Sevidal S, Tabatabaei A, Wen J, Yan Y, Yoder ZW, Zook D. Design and Synthesis of Novel and Selective Glycine Transporter-1 (GlyT1) Inhibitors with Memory Enhancing Properties. J Med Chem 2018; 61:6018-6033. [DOI: 10.1021/acs.jmedchem.8b00372] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Vincent J. Santora
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Theresa A. Almos
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Richard Barido
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Jillian Basinger
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Chris L. Bellows
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Brett C. Bookser
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - J. Guy Breitenbucher
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Nicola J. Broadbent
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Clifford Cabebe
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Chih-Kun Chai
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Mi Chen
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Stephine Chow
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - De Michael Chung
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Lindsay Crickard
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Anne M. Danks
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Graeme C. Freestone
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Dany Gitnick
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Varsha Gupta
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Christine Hoffmaster
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Andrew R. Hudson
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Alan P. Kaplan
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Michael R. Kennedy
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Dong Lee
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - James Limberis
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Kiev Ly
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Chi Ching Mak
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Brittany Masatsugu
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Andrew C. Morse
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Jim Na
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - David Neul
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - John Nikpur
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Marco Peters
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Robert E. Petroski
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Joel Renick
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Kristen Sebring
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Samantha Sevidal
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Ali Tabatabaei
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Jenny Wen
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Yingzhuo Yan
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Zachary W. Yoder
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
| | - Douglas Zook
- Dart NeuroScience LLC, 12278 Scripps Summit Drive, San Diego, California 92121, United States
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50
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Kamiki E, Boehringer R, Polygalov D, Ohshima T, McHugh TJ. Inducible Knockout of the Cyclin-Dependent Kinase 5 Activator p35 Alters Hippocampal Spatial Coding and Neuronal Excitability. Front Cell Neurosci 2018; 12:138. [PMID: 29867369 PMCID: PMC5966581 DOI: 10.3389/fncel.2018.00138] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 05/02/2018] [Indexed: 01/12/2023] Open
Abstract
p35 is an activating co-factor of Cyclin-dependent kinase 5 (Cdk5), a protein whose dysfunction has been implicated in a wide-range of neurological disorders including cognitive impairment and disease. Inducible deletion of the p35 gene in adult mice results in profound deficits in hippocampal-dependent spatial learning and synaptic physiology, however the impact of the loss of p35 function on hippocampal in vivo physiology and spatial coding remains unknown. Here, we recorded CA1 pyramidal cell activity in freely behaving p35 cKO and control mice and found that place cells in the mutant mice have elevated firing rates and impaired spatial coding, accompanied by changes in the temporal organization of spiking both during exploration and rest. These data shed light on the role of p35 in maintaining cellular and network excitability and provide a physiological correlate of the spatial learning deficits in these mice.
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Affiliation(s)
- Eriko Kamiki
- Laboratory for Molecular Brain Science, Department of Life Science and Medical Bioscience, Waseda University, Tokyo, Japan.,Laboratory for Circuit and Behavioral Physiology, RIKEN Center for Brain Science, Wako-shi, Japan
| | - Roman Boehringer
- Laboratory for Circuit and Behavioral Physiology, RIKEN Center for Brain Science, Wako-shi, Japan
| | - Denis Polygalov
- Laboratory for Circuit and Behavioral Physiology, RIKEN Center for Brain Science, Wako-shi, Japan
| | - Toshio Ohshima
- Laboratory for Molecular Brain Science, Department of Life Science and Medical Bioscience, Waseda University, Tokyo, Japan
| | - Thomas J McHugh
- Laboratory for Circuit and Behavioral Physiology, RIKEN Center for Brain Science, Wako-shi, Japan
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