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Zhao J, Zhao G, Lang J, Sun B, Feng S, Li D, Sun G. Astragaloside IV ameliorated neuroinflammation and improved neurological functions in mice exposed to traumatic brain injury by modulating the PERK-eIF2α-ATF4 signaling pathway. J Investig Med 2024:10815589241261293. [PMID: 38869170 DOI: 10.1177/10815589241261293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
Increasing evidence suggests that endoplasmic reticulum stress (ER stress) and neuroinflammation are involved in the complex pathological process of traumatic brain injury (TBI). However, the pathological mechanisms of their interactions in TBI remain incompletely elucidated. Therefore, investigating and ameliorating neuroinflammation and ER stress post-TBI may represent effective strategies for treating secondary brain injury. Astragaloside IV (AS-IV) has been reported as a potential neuroprotective and anti-inflammatory agent in neurological diseases. This study utilized a mouse TBI model to investigate the pathological mechanisms and crosstalk of ER stress, neuroinflammation, and microglial cell morphology in TBI, as well as the mechanisms and potential of AS-IV in improving TBI. The research revealed that post-TBI, inflammatory factors IL-6, IL-1β, and TNF-α increased, microglial cells were activated, and the specific inhibitor of PERK phosphorylation, GSK2656157, intervened to alleviate neuroinflammation and inhibit microglial cell activation. Post-TBI, levels of ER stress-related proteins (p-PERK, p-eIF2a, ATF4, ATF6, and p-IRE1a) increased. Following AS-IV treatment, neurological dysfunction in TBI mice improved. Levels of p-PERK, p-eIF2a, and ATF4 decreased, along with reductions in inflammatory factors IL-6, IL-1β, and TNF-α. Changes in microglial/macrophage M1/M2 polarization were observed. Additionally, the PERK activator CCT020312 intervention eliminated the impact of AS-IV on post-TBI inflammation and ER stress-related proteins p-PERK, p-eIF2a, and ATF4. These results indicate that AS-IV alleviates neuroinflammation and brain damage post-TBI through the PERK pathway, offering new directions and theoretical insights for TBI treatment.
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Affiliation(s)
- Jianfei Zhao
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, The People's Republic of China
- Department of Neurosurgery, The People's Hospital of Shijiazhuang City, Shijiazhuang, The People's Republic of China
| | - Gengshui Zhao
- Department of Neurosurgery, The People's Hospital of Hengshui City, Hengshui, The People's Republic of China
| | - Jiadong Lang
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, The People's Republic of China
| | - Boyu Sun
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, The People's Republic of China
| | - Shiyao Feng
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, The People's Republic of China
| | - Dongsheng Li
- Department of Neurosurgery, The People's Hospital of Shijiazhuang City, Shijiazhuang, The People's Republic of China
| | - Guozhu Sun
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, The People's Republic of China
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2
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Zhai T. Druggable genome-wide Mendelian randomization for identifying the role of integrated stress response in therapeutic targets of bipolar disorder. J Affect Disord 2024; 362:843-852. [PMID: 39025441 DOI: 10.1016/j.jad.2024.07.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 06/13/2024] [Accepted: 07/12/2024] [Indexed: 07/20/2024]
Abstract
For bipolar disorder (BD), the inconsistency of treatment guidelines and the long phases of pharmacological adjustment remain major challenges. BD is known to be comorbid with many medical and psychiatric conditions and they may share inflammatory and stress-related aetiologies, which could give rise to this association. The integrated stress response (ISR) responds to various stress conditions that lead to alterations in cellular homeostasis. However, as a causative mechanism underlying cognitive deficits and neurodegeneration in a broad range of brain disorders, the impact of ISR on BD is understudied. Mendelian randomization has been widely used to repurpose licensed drugs and discover novel therapeutic targets. Thus, we aimed to identify novel therapeutic targets for BD and analyze their pathophysiological mechanisms, using the summary data-based Mendelian Randomization (SMR) and Bayesian colocalization (COLOC) methods to integrate the summary-level data of the GWAS on BD and the expression quantitative trait locus (eQTL) study in blood. We utilized the GWAS data including 41,917 BD cases and 371,549 controls from the Psychiatric Genomics Consortium and the eQTL data from 31,684 participants of predominantly European ancestry from the eQTLGen consortium. The SMR analysis identified the EIF2B5 gene that was associated with BD due to no linkage but pleiotropy or causality. The COLOC analysis strongly suggested that EIF2B5 and the trait of BD were affected by shared causal variants, and thus were colocalized. Utilizing data in EpiGraphDB we find other putative causal BD genes (EIF2AK4 and GSK3B) to prioritize potential alternative drug targets.
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Affiliation(s)
- Ting Zhai
- School of Humanities, Southeast University, Nanjing 211189, China; Institute of Child Development and Education, Southeast University, Nanjing 211189, China; Key Laboratory of Child Development and Learning Science (Southeast University), Ministry of Education, Nanjing 211189, China.
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3
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Li Q, Ouyang Z, Zhang Y, Li Z, Zhu X, Tang Z. Effect of Early Inhibition of Toll-Like Receptor 4 on Hippocampal Plasticity in a Neonatal Rat Model of Hypoxic-Ischemic Brain Damage. Mol Neurobiol 2024:10.1007/s12035-024-04277-3. [PMID: 38954251 DOI: 10.1007/s12035-024-04277-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 05/27/2024] [Indexed: 07/04/2024]
Abstract
Hippocampal plasticity is closely related to physiological brain functions such as learning and memory. However, the effect of toll-like receptor 4 (TLR4) activation on hippocampal plasticity after neonatal hypoxic-ischaemic brain damage (HIBD) remains unclear. In our study, seven-day-old rat pups were randomly categorised into three groups: control, hypoxic-ischemia (HI), and HI + TAK-242 (TAK-242). The pups were ligated in the left common carotid artery and then subjected to hypoxia to establish the neonatal HIBD model.The expression of the TLR4 in the left hippocampus of the HI group was increased compared to the control group, while TAK-242 reduced the expression level at 3 days after HIBD. Additionally, TAK-242 reversed the increased Zea-Longa score, increased the left/right hippocampal weight ratio, and increased the number of Nissl-positive neurons in the hippocampal CA1 region compared to HI group at 3 days after HIBD. Pre-injection of TAK-242 alleviated the decrease in PSD95, Aggrecan and NR1, BDNF, CREB, and pCREB expression in the hippocampus at 24 h after HIBD. It also alleviated the decrease in PSD95, BDNF, and NR2A/NR1 expression in the hippocampus at 7 days after HIBD. Furthermore, Pre-injection of TAK-242 alleviated the decrease in NR2A/NR1 expression at 21 days after HIBD. Finally,TAK-242 increased the percentage of third-grade dendritic mushroom spines processes in the basal and apical segments of neurons in the hippocampal CA1 region at 21 days after HIBD.Therefore, we conclude that preinhibition of TLR4 prior to neonatal HIBD improved the plasticity of the hippocampus.
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Affiliation(s)
- Qinghe Li
- Department of Neonatology, The Fifth Affiliated Hospital of Southern Medical University, Guangzhou, 510900, Guangdong, China
| | - Zhicui Ouyang
- Department of Neonatology, Affiliated Hospital of Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Yunqiao Zhang
- Neuropsychological Center, The Sixth Affiliated Hospital, Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Zhen Li
- Department of Neonatology, The Fifth Affiliated Hospital of Southern Medical University, Guangzhou, 510900, Guangdong, China
| | - Xing Zhu
- Neonatal Center, Beijing Children's Hospital, Capital Medical University, Beijing, 100045, China
| | - Zhen Tang
- Department of Neonatology, The Fifth Affiliated Hospital of Southern Medical University, Guangzhou, 510900, Guangdong, China.
- Department of Neonatology, Affiliated Hospital of Guilin Medical University, Guilin, 541001, Guangxi, China.
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Lockshin ER, Calakos N. The integrated stress response in brain diseases: A double-edged sword for proteostasis and synapses. Curr Opin Neurobiol 2024; 87:102886. [PMID: 38901329 DOI: 10.1016/j.conb.2024.102886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 05/22/2024] [Accepted: 05/24/2024] [Indexed: 06/22/2024]
Abstract
The integrated stress response (ISR) is a highly conserved biochemical pathway that regulates protein synthesis. The ISR is activated in response to diverse stressors to restore cellular homeostasis. As such, the ISR is implicated in a wide range of diseases, including brain disorders. However, in the brain, the ISR also has potent influence on processes beyond proteostasis, namely synaptic plasticity, learning and memory. Thus, in the setting of brain diseases, ISR activity may have dual effects on proteostasis and synaptic function. In this review, we consider the ISR's contribution to brain disorders through the lens of its potential effects on synaptic plasticity. From these examples, we illustrate that at times ISR activity may be a "double-edged sword". We also highlight its potential as a therapeutic target to improve circuit function in brain diseases independent of its role in disease pathogenesis.
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Affiliation(s)
- Elana R Lockshin
- Department of Neurobiology, Duke University Medical Center, Durham, NC 27710, USA; Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
| | - Nicole Calakos
- Department of Neurobiology, Duke University Medical Center, Durham, NC 27710, USA; Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA; Department of Neurology, Duke University Medical Center, Durham, NC 27710, USA; Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA.
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Pei Y, Liu S, Wang L, Chen C, Hu M, Xue Y, Guan D, Xie L, Liao H, Zhou J, Zhang H. Design, Synthesis, and Biological Evaluation of Eukaryotic Initiation Factor 2B (eIF2B) Activators. ChemMedChem 2024; 19:e202300716. [PMID: 38426720 DOI: 10.1002/cmdc.202300716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/29/2024] [Accepted: 02/29/2024] [Indexed: 03/02/2024]
Abstract
The eukaryotic initiation factor 2B (eIF2B) is a key regulator in protein-regulated signaling pathways and is closely related to the function of the central nervous system. Modulating eIF2B could retard the process of neurodegenerative diseases, including Alzheimer's disease (AD), amyotrophic lateral sclerosis (ALS), and vanishing white matter disease (VWM) et al. Here, we designed and synthesized a series of novel eIF2B activators containing oxadiazole fragments. The activating effects of compounds on eIF2B were investigated through testing the inhibition of ATF4 expression. Of all the targeted compounds, compounds 21 and 29 exhibited potent inhibition on ATF4 expression with IC50 values of 32.43 nM and 47.71 nM, respectively, which were stronger than that of ISRIB (IC50=67.90 nM). ATF4 mRNA assay showed that these two compounds could restore ATF4 mRNA to normal levels in thapsigargin-stimulated HeLa cells. Protein Translation assay showed that both compounds were effective in restoring protein synthesis. Compound potency assay showed that both compounds had similar potency to ISRIB with EC50 values of 5.844 and 37.70 nM. Cytotoxicity assay revealed that compounds 21 and 29 had low toxicity and were worth further investigation.
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Affiliation(s)
- Yifeng Pei
- Center for Drug Discovery, Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing, 210009, PR China
| | - Sentao Liu
- Center for Drug Discovery, Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing, 210009, PR China
| | - Lixun Wang
- Center for Drug Discovery, Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing, 210009, PR China
| | - Chao Chen
- Center for Drug Discovery, Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing, 210009, PR China
| | - Mengqiu Hu
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing, China
| | - Yi Xue
- Center for Drug Discovery, Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing, 210009, PR China
| | - Dezhong Guan
- Department of Medicinal Chemistry, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, PR China
| | - Lingfeng Xie
- Center for Drug Discovery, Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing, 210009, PR China
| | - Hong Liao
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing, China
| | - Jinpei Zhou
- Department of Medicinal Chemistry, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, PR China
| | - Huibin Zhang
- Center for Drug Discovery, Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing, 210009, PR China
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6
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Lu HJ, Koju N, Sheng R. Mammalian integrated stress responses in stressed organelles and their functions. Acta Pharmacol Sin 2024; 45:1095-1114. [PMID: 38267546 PMCID: PMC11130345 DOI: 10.1038/s41401-023-01225-0] [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: 06/29/2023] [Accepted: 12/30/2023] [Indexed: 01/26/2024] Open
Abstract
The integrated stress response (ISR) triggered in response to various cellular stress enables mammalian cells to effectively cope with diverse stressful conditions while maintaining their normal functions. Four kinases (PERK, PKR, GCN2, and HRI) of ISR regulate ISR signaling and intracellular protein translation via mediating the phosphorylation of eukaryotic translation initiation factor 2 α (eIF2α) at Ser51. Early ISR creates an opportunity for cells to repair themselves and restore homeostasis. This effect, however, is reversed in the late stages of ISR. Currently, some studies have shown the non-negligible impact of ISR on diseases such as ischemic diseases, cognitive impairment, metabolic syndrome, cancer, vanishing white matter, etc. Hence, artificial regulation of ISR and its signaling with ISR modulators becomes a promising therapeutic strategy for relieving disease symptoms and improving clinical outcomes. Here, we provide an overview of the essential mechanisms of ISR and describe the ISR-related pathways in organelles including mitochondria, endoplasmic reticulum, Golgi apparatus, and lysosomes. Meanwhile, the regulatory effects of ISR modulators and their potential application in various diseases are also enumerated.
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Affiliation(s)
- Hao-Jun Lu
- Department of Pharmacology and Laboratory of Aging and Nervous Diseases, Jiangsu Key Laboratory of Neuropsychiatric Diseases, College of Pharmaceutical Sciences of Soochow University, Suzhou, 215123, China
| | - Nirmala Koju
- Department of Pharmacology and Laboratory of Aging and Nervous Diseases, Jiangsu Key Laboratory of Neuropsychiatric Diseases, College of Pharmaceutical Sciences of Soochow University, Suzhou, 215123, China
| | - Rui Sheng
- Department of Pharmacology and Laboratory of Aging and Nervous Diseases, Jiangsu Key Laboratory of Neuropsychiatric Diseases, College of Pharmaceutical Sciences of Soochow University, Suzhou, 215123, China.
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7
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Zhang N, Nao J, Zhang S, Dong X. Novel insights into the activating transcription factor 4 in Alzheimer's disease and associated aging-related diseases: Mechanisms and therapeutic implications. Front Neuroendocrinol 2024:101144. [PMID: 38797197 DOI: 10.1016/j.yfrne.2024.101144] [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] [Received: 02/05/2024] [Revised: 05/16/2024] [Accepted: 05/22/2024] [Indexed: 05/29/2024]
Abstract
Ageing is inherent to all human beings, most mechanistic explanations of ageing results from the combined effects of various physiological and pathological processes. Additionally, aging pivotally contributes to several chronic diseases. Activating transcription factor 4 (ATF4), a member of the ATF/cAMP response element-binding protein family, has recently emerged as a pivotal player owing to its indispensable role in the pathophysiological processes of Alzheimer's disease and aging-related diseases. Moreover, ATF4 is integral to numerous biological processes. Therefore, this article aims to comprehensively review relevant research on the role of ATF4 in the onset and progression of aging-related diseases, elucidating its potential mechanisms and therapeutic approaches. Our objective is to furnish scientific evidence for the early identification of risk factors in aging-related diseases and pave the way for new research directions for their treatment. By elucidating the signaling pathway network of ATF4 in aging-related diseases, we aspire to gain a profound understanding of the molecular and cellular mechanisms, offering novel strategies for addressing aging and developing related therapeutics.
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Affiliation(s)
- Nan Zhang
- Department of Neurology, the Seventh Clinical College of China Medical University, No. 24 Central Street, Xinfu District, Fushun 113000, Liaoning, China.
| | - Jianfei Nao
- Department of Neurology, Shengjing Hospital of China Medical University, No. 36 Sanhao Street, Heping District, Shenyang 110000, Liaoning, China.
| | - Shun Zhang
- Department of Neurology, Shengjing Hospital of China Medical University, No. 36 Sanhao Street, Heping District, Shenyang 110000, Liaoning, China.
| | - Xiaoyu Dong
- Department of Neurology, Shengjing Hospital of China Medical University, No. 36 Sanhao Street, Heping District, Shenyang 110000, Liaoning, China.
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8
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Miquel-Rio L, Sarriés-Serrano U, Sancho-Alonso M, Florensa-Zanuy E, Paz V, Ruiz-Bronchal E, Manashirov S, Campa L, Pilar-Cuéllar F, Bortolozzi A. ER stress in mouse serotonin neurons triggers a depressive phenotype alleviated by ketamine targeting eIF2α signaling. iScience 2024; 27:109787. [PMID: 38711453 PMCID: PMC11070602 DOI: 10.1016/j.isci.2024.109787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 02/19/2024] [Accepted: 04/16/2024] [Indexed: 05/08/2024] Open
Abstract
Depression is a devastating mood disorder that causes significant disability worldwide. Current knowledge of its pathophysiology remains modest and clear biological markers are lacking. Emerging evidence from human and animal models reveals persistent alterations in endoplasmic reticulum (ER) homeostasis, suggesting that ER stress-related signaling pathways may be targets for prevention and treatment. However, the neurobiological basis linking the pathways involved in depression-related ER stress remains unknown. Here, we report that an induced model of ER stress in mouse serotonin (5-HT) neurons is associated with reduced Egr1-dependent 5-HT cellular activity and 5-HT neurotransmission, resulting in neuroplasticity deficits in forebrain regions and a depressive-like phenotype. Ketamine administration engages downstream eIF2α signaling to trigger rapid neuroplasticity events that rescue the depressive-like effects. Collectively, these data identify ER stress in 5-HT neurons as a cellular pathway involved in the pathophysiology of depression and show that eIF2α is critical in eliciting ketamine's fast antidepressant effects.
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Affiliation(s)
- Lluis Miquel-Rio
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain
- Systems Neuropharmacology Research Group, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain
- Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain
- University of Barcelona (UB), 08036 Barcelona, Spain
| | - Unai Sarriés-Serrano
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain
- Systems Neuropharmacology Research Group, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain
- Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain
- University of the Basque Country UPV/EHU, E-48940 Leioa, Bizkaia, Spain
| | - María Sancho-Alonso
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain
- Systems Neuropharmacology Research Group, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain
- Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain
| | - Eva Florensa-Zanuy
- Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain
- Department of Molecular and Cellular Signaling, Institute of Biomedicine and Biotechnology of Cantabria (IBBTEC), University of Cantabria-CSIC, 39011 Santander, Spain
| | - Verónica Paz
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain
- Systems Neuropharmacology Research Group, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain
- Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain
| | - Esther Ruiz-Bronchal
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain
- Systems Neuropharmacology Research Group, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain
- Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain
| | - Sharon Manashirov
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain
- Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain
- miCure Therapeutics LTD., Tel-Aviv 6423902, Israel
| | - Leticia Campa
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain
- Systems Neuropharmacology Research Group, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain
- Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain
| | - Fuencisla Pilar-Cuéllar
- Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain
- Department of Molecular and Cellular Signaling, Institute of Biomedicine and Biotechnology of Cantabria (IBBTEC), University of Cantabria-CSIC, 39011 Santander, Spain
| | - Analia Bortolozzi
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain
- Systems Neuropharmacology Research Group, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain
- Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain
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Si J, Chen X, Qi K, Li D, Liu B, Zheng Y, Ji E, Yang S. Shengmaisan combined with Liuwei Dihuang Decoction alleviates chronic intermittent hypoxia-induced cognitive impairment by activating the EPO/EPOR/JAK2 signaling pathway. Chin J Nat Med 2024; 22:426-440. [PMID: 38796216 DOI: 10.1016/s1875-5364(24)60640-0] [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: 12/20/2023] [Indexed: 05/28/2024]
Abstract
Chronic intermittent hypoxia (CIH), a principal pathophysiological aspect of obstructive sleep apnea (OSA), is associated with cognitive deficits. Clinical evidence suggests that a combination of Shengmaisan and Liuwei Dihuang Decoctions (SMS-LD) can enhance cognitive function by nourishing yin and strengthening the kidneys. This study aimed to assess the efficacy and underlying mechanisms of SMS-LD in addressing cognitive impairments induced by CIH. We exposed C57BL/6N mice to CIH for five weeks (20%-5% O2, 5 min/cycle, 8 h/day) and administered SMS-LD intragastrically (15.0 or 30 g·kg-1·day) 30 min before each CIH session. Additionally, AG490, a JJanus kinase 2 (JAK2) inhibitor, was administered via intracerebroventricular injection. Cognitive function was evaluated using the Morris water maze, while synaptic and mitochondrial structures were examined by transmission electron microscopy. Oxidative stress levels were determined using DHE staining, and the activation of the erythropoietin (ER)/ER receptor (EPOR)/JAK2 signaling pathway was analyzed through immunohistochemistry and Western blotting. To further investigate molecular mechanisms, HT22 cells were treated in vitro with either SMS-LD medicated serum alone or in combination with AG490 and then exposed to CIH for 48 h. Our results indicate that SMS-LD significantly mitigated CIH-induced cognitive impairments in mice. Specifically, SMS-LD treatment enhanced dendritic spine density, ameliorated mitochondrial dysfunction, reduced oxidative stress, and activated the EPO/EPOR/JAK2 signaling pathway. Conversely, AG490 negated SMS-LD's neuroprotective and cognitive improvement effects under CIH conditions. These findings suggest that SMS-LD's beneficial impact on cognitive impairment and synaptic and mitochondrial integrity under CIH conditions may predominantly be attributed to the activation of the EPO/EPOR/JAK2 signaling pathway.
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Affiliation(s)
- Jianchao Si
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang 050000, China
| | - Xue Chen
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang 050000, China
| | - Kerong Qi
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang 050000, China
| | - Dongli Li
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang 050000, China
| | - Bingbing Liu
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang 050000, China
| | - Yuying Zheng
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang 050000, China; Department of Geriatrics, First People's Hospital of Xiaogan, Xiaogan 432000, China
| | - Ensheng Ji
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang 050000, China; Hebei Technology Innovation Center of TCM Combined Hydrogen Medicine, Shijiazhuang 050000, China.
| | - Shengchang Yang
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang 050000, China; Hebei Technology Innovation Center of TCM Combined Hydrogen Medicine, Shijiazhuang 050000, China.
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10
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Ryoo HD. The integrated stress response in metabolic adaptation. J Biol Chem 2024; 300:107151. [PMID: 38462161 PMCID: PMC10998230 DOI: 10.1016/j.jbc.2024.107151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 02/28/2024] [Accepted: 03/03/2024] [Indexed: 03/12/2024] Open
Abstract
The integrated stress response (ISR) refers to signaling pathways initiated by stress-activated eIF2α kinases. Distinct eIF2α kinases respond to different stress signals, including amino acid deprivation and mitochondrial stress. Such stress-induced eIF2α phosphorylation attenuates general mRNA translation and, at the same time, stimulates the preferential translation of specific downstream factors to orchestrate an adaptive gene expression program. In recent years, there have been significant new advances in our understanding of ISR during metabolic stress adaptation. Here, I discuss those advances, reviewing among others the ISR activation mechanisms in response to amino acid deprivation and mitochondrial stress. In addition, I review how ISR regulates the amino acid metabolic pathways and how changes in the ISR impact the physiology and pathology of various disease models.
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Affiliation(s)
- Hyung Don Ryoo
- Department of Cell Biology, New York University Grossman School of Medicine, New York, New York, USA.
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11
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Liu T, Yu S, Liu M, Zhao Z, Yuan J, Sha Z, Liu X, Qian Y, Nie M, Jiang R. Cognitive impairment in Chinese traumatic brain injury patients: from challenge to future perspectives. Front Neurosci 2024; 18:1361832. [PMID: 38529265 PMCID: PMC10961372 DOI: 10.3389/fnins.2024.1361832] [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: 12/27/2023] [Accepted: 02/27/2024] [Indexed: 03/27/2024] Open
Abstract
Traumatic Brain Injury (TBI) is a prevalent form of neurological damage that may induce varying degrees of cognitive dysfunction in patients, consequently impacting their quality of life and social functioning. This article provides a mini review of the epidemiology in Chinese TBI patients and etiology of cognitive impairment. It analyzes the risk factors of cognitive impairment, discusses current management strategies for cognitive dysfunction in Chinese TBI patients, and summarizes the strengths and limitations of primary testing tools for TBI-related cognitive functions. Furthermore, the article offers a prospective analysis of future challenges and opportunities. Its objective is to contribute as a reference for the prevention and management of cognitive dysfunction in Chinese TBI patients.
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Affiliation(s)
- Tao Liu
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, State Key Laboratory of Experimental Hematology, Tianjin Medical University General Hospital, Tianjin, China
- The George Institute for Global Health, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
| | - Shaohui Yu
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, State Key Laboratory of Experimental Hematology, Tianjin Medical University General Hospital, Tianjin, China
| | - Mingqi Liu
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, State Key Laboratory of Experimental Hematology, Tianjin Medical University General Hospital, Tianjin, China
| | - Zhihao Zhao
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, State Key Laboratory of Experimental Hematology, Tianjin Medical University General Hospital, Tianjin, China
| | - Jiangyuan Yuan
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, State Key Laboratory of Experimental Hematology, Tianjin Medical University General Hospital, Tianjin, China
| | - Zhuang Sha
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, State Key Laboratory of Experimental Hematology, Tianjin Medical University General Hospital, Tianjin, China
| | - Xuanhui Liu
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, State Key Laboratory of Experimental Hematology, Tianjin Medical University General Hospital, Tianjin, China
| | - Yu Qian
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, State Key Laboratory of Experimental Hematology, Tianjin Medical University General Hospital, Tianjin, China
| | - Meng Nie
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, State Key Laboratory of Experimental Hematology, Tianjin Medical University General Hospital, Tianjin, China
| | - Rongcai Jiang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, State Key Laboratory of Experimental Hematology, Tianjin Medical University General Hospital, Tianjin, China
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Ni H, Kan X, Rui Q, Zhang Y, Zhai W, Zhang B, Yu Z. RACK1 promotes autophagy via the PERK signaling pathway to protect against traumatic brain injury in rats. CNS Neurosci Ther 2024; 30:e14691. [PMID: 38532543 PMCID: PMC10966134 DOI: 10.1111/cns.14691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 02/29/2024] [Accepted: 03/03/2024] [Indexed: 03/28/2024] Open
Abstract
AIMS Neuronal cell death is a primary factor that determines the outcome after traumatic brain injury (TBI). We previously revealed the importance of receptor for activated C kinase (RACK1), a multifunctional scaffold protein, in maintaining neuronal survival after TBI, but the specific mechanism remains unclear. The aim of this study was to explore the mechanism underlying RACK1-mediated neuroprotection in TBI. METHODS TBI model was established using controlled cortical impact injury in Sprague-Dawley rats. Genetic intervention and pharmacological inhibition of RACK1 and PERK-autophagy signaling were administrated by intracerebroventricular injection. Western blotting, coimmunoprecipitation, transmission electron microscopy, real-time PCR, immunofluorescence, TUNEL staining, Nissl staining, neurobehavioral tests, and contusion volume assessment were performed. RESULTS Endogenous RACK1 was upregulated and correlated with autophagy induction after TBI. RACK1 knockdown markedly inhibited TBI-induced autophagy, whereas RACK1 overexpression exerted the opposite effects. Moreover, RACK1 overexpression ameliorated neuronal apoptosis, neurological deficits, and cortical tissue loss after TBI, and these effects were abrogated by the autophagy inhibitor 3-methyladenine or siRNAs targeting Beclin1 and Atg5. Mechanistically, RACK1 interacted with PERK and activated PERK signaling. Pharmacological and genetic inhibition of the PERK pathway abolished RACK1-induced autophagy after TBI. CONCLUSION Our findings indicate that RACK1 protected against TBI-induced neuronal damage partly through autophagy induction by regulating the PERK signaling pathway.
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Affiliation(s)
- Haibo Ni
- Department of Neurosurgery & Brain and Nerve Research LaboratoryThe First Affiliated Hospital of Soochow UniversitySuzhouChina
- Department of NeurosurgeryThe Fourth Affiliated Hospital of Soochow UniversitySuzhouChina
| | - Xugang Kan
- Department of Neurobiology and Cell Biology, Xuzhou Key Laboratory of NeurobiologyXuzhou Medical UniversityXuzhouChina
| | - Qin Rui
- Department of Center of Clinical LaboratoryThe Fourth Affiliated Hospital of Soochow UniversitySuzhouChina
| | - Yang Zhang
- Department of Neurobiology and Cell Biology, Xuzhou Key Laboratory of NeurobiologyXuzhou Medical UniversityXuzhouChina
| | - Weiwei Zhai
- Department of Neurosurgery & Brain and Nerve Research LaboratoryThe First Affiliated Hospital of Soochow UniversitySuzhouChina
| | - Baole Zhang
- Department of Neurobiology and Cell Biology, Xuzhou Key Laboratory of NeurobiologyXuzhou Medical UniversityXuzhouChina
| | - Zhengquan Yu
- Department of Neurosurgery & Brain and Nerve Research LaboratoryThe First Affiliated Hospital of Soochow UniversitySuzhouChina
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13
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Yang Y, Lu D, Wang M, Liu G, Feng Y, Ren Y, Sun X, Chen Z, Wang Z. Endoplasmic reticulum stress and the unfolded protein response: emerging regulators in progression of traumatic brain injury. Cell Death Dis 2024; 15:156. [PMID: 38378666 PMCID: PMC10879178 DOI: 10.1038/s41419-024-06515-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/25/2024] [Accepted: 01/29/2024] [Indexed: 02/22/2024]
Abstract
Traumatic brain injury (TBI) is a common trauma with high mortality and disability rates worldwide. However, the current management of this disease is still unsatisfactory. Therefore, it is necessary to investigate the pathophysiological mechanisms of TBI in depth to improve the treatment options. In recent decades, abundant evidence has highlighted the significance of endoplasmic reticulum stress (ERS) in advancing central nervous system (CNS) disorders, including TBI. ERS following TBI leads to the accumulation of unfolded proteins, initiating the unfolded protein response (UPR). Protein kinase RNA-like ER kinase (PERK), inositol-requiring protein 1 (IRE1), and activating transcription factor 6 (ATF6) are the three major pathways of UPR initiation that determine whether a cell survives or dies. This review focuses on the dual effects of ERS on TBI and discusses the underlying mechanisms. It is suggested that ERS may crosstalk with a series of molecular cascade responses, such as mitochondrial dysfunction, oxidative stress, neuroinflammation, autophagy, and cell death, and is thus involved in the progression of secondary injury after TBI. Hence, ERS is a promising candidate for the management of TBI.
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Affiliation(s)
- Yayi Yang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188Shizi Street, Suzhou, 215006, Jiangsu Province, China
- Suzhou Medical College of Soochow University, Suzhou, Jiangsu Province, China
| | - Dengfeng Lu
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188Shizi Street, Suzhou, 215006, Jiangsu Province, China
| | - Menghan Wang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188Shizi Street, Suzhou, 215006, Jiangsu Province, China
- Suzhou Medical College of Soochow University, Suzhou, Jiangsu Province, China
| | - Guangjie Liu
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188Shizi Street, Suzhou, 215006, Jiangsu Province, China
| | - Yun Feng
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188Shizi Street, Suzhou, 215006, Jiangsu Province, China
- Suzhou Medical College of Soochow University, Suzhou, Jiangsu Province, China
| | - Yubo Ren
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188Shizi Street, Suzhou, 215006, Jiangsu Province, China
| | - Xiaoou Sun
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188Shizi Street, Suzhou, 215006, Jiangsu Province, China.
| | - Zhouqing Chen
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188Shizi Street, Suzhou, 215006, Jiangsu Province, China.
| | - Zhong Wang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188Shizi Street, Suzhou, 215006, Jiangsu Province, China.
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14
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Guo W, Liu K, Wang Y, Ge X, Ma Y, Qin J, Zhang C, Zhao Y, Shi C. Neurotrophins and neural stem cells in posttraumatic brain injury repair. Animal Model Exp Med 2024; 7:12-23. [PMID: 38018458 PMCID: PMC10961886 DOI: 10.1002/ame2.12363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 10/26/2023] [Indexed: 11/30/2023] Open
Abstract
Traumatic brain injury (TBI) is the main cause of disability, mental health disorder, and even death, with its incidence and social costs rising steadily. Although different treatment strategies have been developed and tested to mitigate neurological decline, a definitive cure for these conditions remains elusive. Studies have revealed that various neurotrophins represented by the brain-derived neurotrophic factor are the key regulators of neuroinflammation, apoptosis, blood-brain barrier permeability, neurite regeneration, and memory function. These factors are instrumental in alleviating neuroinflammation and promoting neuroregeneration. In addition, neural stem cells (NSC) contribute to nerve repair through inherent neuroprotective and immunomodulatory properties, the release of neurotrophins, the activation of endogenous NSCs, and intercellular signaling. Notably, innovative research proposals are emerging to combine BDNF and NSCs, enabling them to synergistically complement and promote each other in facilitating injury repair and improving neuron differentiation after TBI. In this review, we summarize the mechanism of neurotrophins in promoting neurogenesis and restoring neural function after TBI, comprehensively explore the potential therapeutic effects of various neurotrophins in basic research on TBI, and investigate their interaction with NSCs. This endeavor aims to provide a valuable insight into the clinical treatment and transformation of neurotrophins in TBI, thereby promoting the progress of TBI therapeutics.
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Affiliation(s)
- Wenwen Guo
- Laboratory Animal CenterFourth Military Medical UniversityXi'anP.R. China
- Gansu University of Traditional Chinese MedicineLanzhouP.R. China
| | - Ke Liu
- Laboratory Animal CenterFourth Military Medical UniversityXi'anP.R. China
- Gansu University of Traditional Chinese MedicineLanzhouP.R. China
| | - Yinghua Wang
- Medical College of Yan'an UniversityYan'anP.R. China
| | - Xu Ge
- Laboratory Animal CenterFourth Military Medical UniversityXi'anP.R. China
| | - Yifan Ma
- Gansu University of Traditional Chinese MedicineLanzhouP.R. China
| | - Jing Qin
- Laboratory Animal CenterFourth Military Medical UniversityXi'anP.R. China
| | - Caiqin Zhang
- Laboratory Animal CenterFourth Military Medical UniversityXi'anP.R. China
| | - Ya Zhao
- Laboratory Animal CenterFourth Military Medical UniversityXi'anP.R. China
| | - Changhong Shi
- Laboratory Animal CenterFourth Military Medical UniversityXi'anP.R. China
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15
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Qiao H, Li H. PLP2 Could Be a Prognostic Biomarker and Potential Treatment Target in Glioblastoma Multiforme. Pharmgenomics Pers Med 2023; 16:991-1009. [PMID: 37964785 PMCID: PMC10642424 DOI: 10.2147/pgpm.s425251] [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: 07/09/2023] [Accepted: 10/16/2023] [Indexed: 11/16/2023] Open
Abstract
Objective This study aimed to discern the association between PLP2 expression, its biological significance, and the extent of immune infiltration in human GBM. Methods Utilizing the GEPIA2 and TCGA databases, we contrasted the expression levels of PLP2 in GBM against normal tissue. We utilized GEPIA2 and LinkedOmics for survival analysis, recognized genes co-expressed with PLP2 via cBioPortal and GEPIA2, and implemented GO and KEGG analyses. The STRING database facilitated the construction of protein-protein interaction networks. We evaluated the relationship of PLP2 with tumor immune infiltrates using ssGSEA and the TIMER 2.0 database. An IHC assay assessed PLP2 and PDL-1 expression in GBM tissue, and the Drugbank database aided in identifying potential PLP2-targeting compounds. Molecular docking was accomplished using Autodock Vina 1.2.2. Results PLP2 expression was markedly higher in GBM tissues in comparison to normal tissues. High PLP2 expression correlated with a decrease in overall survival across two databases. Functional analyses highlighted a focus of PLP2 functions within leukocyte. Discrepancies in PLP2 expression were evident in immune infiltration, impacting CD4+ T cells, neutrophils, myeloid dendritic cells, and macrophages. There was a concomitant increase in PLP2 and PD-L1 expression in GBM tissues, revealing a link between the two. Molecular docking with ethosuximide and praziquantel yielded scores of -7.441 and -4.295 kcal/mol, correspondingly. Conclusion PLP2's upregulation in GBM may adversely influence the lifespan of GBM patients. The involvement of PLP2 in pathways linked to leukocyte function is suggested. The positive correlation between PLP2 and PD-L1 could provide insights into PLP2's role in glioma modulation. Our research hints at PLP2's potential as a therapeutic target for GBM, with ethosuximide and praziquantel emerging as potential treatment candidates, especially emphasizing the potential of these compounds in GBM treatment targeting PLP2.
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Affiliation(s)
- Hao Qiao
- The Affiliated Hospital of Qingdao University, Qingdao, Shandong, People’s Republic of China
| | - Huanting Li
- The Affiliated Hospital of Qingdao University, Qingdao, Shandong, People’s Republic of China
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16
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Wang Y, Wu D, Li D, Zhou X, Fan D, Pan J. The role of PERK-eIF2α-ATF4-CHOP pathway in sevoflurane induced neuroapoptosis and cognitive dysfunction in aged mice. Cell Signal 2023; 110:110841. [PMID: 37549858 DOI: 10.1016/j.cellsig.2023.110841] [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: 05/28/2023] [Revised: 07/24/2023] [Accepted: 08/02/2023] [Indexed: 08/09/2023]
Abstract
Postoperative cognitive dysfunction (POCD) is a common surgical complication that causes additional pain in patients and affects their quality of life. To address this problem, emerging studies have focused on the POCD. Recent studies have shown that aging and anesthetic exposure are the two major risk factors for developing POCD. However, few reports described the exact molecular mechanisms underlying POCD in elderly patients. In the previous studies, the endoplasmic reticulum (ER) stress and neuroapoptosis in the hippocampus were associated with inducing POCD; however, no further information on the related signaling pathways could be disclosed. The PERK-eIF2α-ATF4-CHOP pathway is identified as the main regulatory pathway involved in ER stress and cell apoptosis. Therefore, we assume that the occurrence of POCD induced by sevoflurane inhalation may potentially result from ER stress and neuroapoptosis in the hippocampus of aged mice mediated by the PERK-eIF2α-ATF4-CHOP pathway. In our study, we found a relationship between sevoflurane inhalation concentration and memory decline in aged mice, with a 'ceiling effect'. We have confirmed that POCD induced by sevoflurane results from ER stress and neuroapoptosis in the hippocampus of aged mice, which is regulated by the over-expression of PERK-eIF2α-ATF4-CHOP pathway. Furthermore, we also showed that the dephosphorylation inhibitor of eIF2α (salubrinal) could down-regulate PERK-eIF2α-ATF4-CHOP pathway expression to inhibit ER stress and enhance the cognitive function of aged mice. In general, our study has elucidated one of the molecular mechanisms of sevoflurane-related cognitive dysfunction in aged groups and provided new strategies for treating sevoflurane-induced POCD.
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Affiliation(s)
- Yuhao Wang
- State Key Laboratory of Oral Disease & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, PR China; Frontier Innovation Center for Dental Medicine Plus, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, PR China
| | - Di Wu
- State Key Laboratory of Oral Disease & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, PR China
| | - Danni Li
- Department of Anesthesiology, Sichuan Academy of Medical Science, Sichuan Provincial People's Hospital, Chengdu 610072, PR China; School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, PR China
| | - Xueer Zhou
- State Key Laboratory of Oral Disease & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, PR China; Frontier Innovation Center for Dental Medicine Plus, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, PR China
| | - Dan Fan
- Department of Anesthesiology, Sichuan Academy of Medical Science, Sichuan Provincial People's Hospital, Chengdu 610072, PR China; School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, PR China.
| | - Jian Pan
- State Key Laboratory of Oral Disease & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, PR China; Frontier Innovation Center for Dental Medicine Plus, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, PR China.
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17
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Lahiri A, Walton JC, Zhang N, Billington N, DeVries AC, Meares GP. Astrocytic deletion of protein kinase R-like ER kinase (PERK) does not affect learning and memory in aged mice but worsens outcome from experimental stroke. J Neurosci Res 2023; 101:1586-1610. [PMID: 37314006 PMCID: PMC10524975 DOI: 10.1002/jnr.25224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 05/22/2023] [Accepted: 05/27/2023] [Indexed: 06/15/2023]
Abstract
Aging is associated with cognitive decline and is the main risk factor for a myriad of conditions including neurodegeneration and stroke. Concomitant with aging is the progressive accumulation of misfolded proteins and loss of proteostasis. Accumulation of misfolded proteins in the endoplasmic reticulum (ER) leads to ER stress and activation of the unfolded protein response (UPR). The UPR is mediated, in part, by the eukaryotic initiation factor 2α (eIF2α) kinase protein kinase R-like ER kinase (PERK). Phosphorylation of eIF2α reduces protein translation as an adaptive mechanism but this also opposes synaptic plasticity. PERK, and other eIF2α kinases, have been widely studied in neurons where they modulate both cognitive function and response to injury. The impact of astrocytic PERK signaling in cognitive processes was previously unknown. To examine this, we deleted PERK from astrocytes (AstroPERKKO ) and examined the impact on cognitive functions in middle-aged and old mice of both sexes. Additionally, we tested the outcome following experimental stroke using the transient middle cerebral artery occlusion (MCAO) model. Tests of short-term and long-term learning and memory as well as of cognitive flexibility in middle-aged and old mice revealed that astrocytic PERK does not regulate these processes. Following MCAO, AstroPERKKO had increased morbidity and mortality. Collectively, our data demonstrate that astrocytic PERK has limited impact on cognitive function and has a more prominent role in the response to neural injury.
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Affiliation(s)
| | | | | | | | - A Courtney DeVries
- Department of Neuroscience
- Rockefeller Neuroscience Institute
- Department of Medicine, Division of Hematology and Oncology
- WVU Cancer Institute, Morgantown, WV- 26506, USA
- West Virginia Clinical and Translational Science Institute, West Virginia University, Morgantown, WV- 26506, USA
| | - Gordon P. Meares
- Department of Microbiology, Immunology and Cell Biology
- Department of Neuroscience
- Rockefeller Neuroscience Institute
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You C, Zhang Z, Ying H, Yang Z, Ma Y, Hong J, Xue M, Li X, Li H, Zhang C, Wang W, Cai X, Li X. Blockage of calcium-sensing receptor improves chronic intermittent hypoxia-induced cognitive impairment by PERK-ATF4-CHOP pathway. Exp Neurol 2023; 368:114500. [PMID: 37553048 DOI: 10.1016/j.expneurol.2023.114500] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 07/24/2023] [Accepted: 08/03/2023] [Indexed: 08/10/2023]
Abstract
Obstructive sleep apnea-hypopnea syndrome (OSAHS) is involved in cognitive impairment of children. Chronic intermittent hypoxia (CIH) is considered as the critical pathophysiological mechanism of OSAHS. Calcium sensitive receptor (CaSR) mediated apoptosis in many neurological disease models by endoplasmic reticulum stress (ERS)-related pathway. However, little is known about the role of CaSR in OSAHS-induced cognitive dysfunction. In this study, we explored the effect of CaSR on CIH-induced cognitive impairment and possible mechanisms on regulation of PERK-ATF4-CHOP pathway in vivo and in vitro. CIH exposed for 9 h in PC12 cells and resulted in the cell apoptosis, simulating OSAHS-induced neuronal injury. CIH upregulated the level of CaSR, p-PERK, ATF4 and CHOP, contributing to the cell apoptosis. Treated with CaSR inhibitor (NPS-2143) or p-PERK inhibitor (GSK2656157) before CIH exposure, CIH-induced PC12 cell apoptosis was alleviated via inhibition of CaSR by downregulating p-PERK, ATF4 and CHOP. In addition, we established CIH mice model. With CIH exposure for 4 weeks in mice, more spatial memory errors were observed during 8-arm radial maze test. CIH significantly increased apoptotic cells in hippocampus via upregulating cleaved Caspase-3 and downregulating ratio of Bcl-2 to Bax. Besides, treatment of CaSR inhibitor alleviated the hippocampal neuronal apoptosis following CIH with downregulated p-PERK, ATF4 and CHOP, suggesting that CaSR contributed to CIH-induced neuronal apoptosis in hippocampus via ERS pathway. Sum up, our results demonstrated that CaSR accelerated hippocampal apoptosis via PERK-ATF4-CHOP pathway, holding a critical function on CIH-mediated cognitive impairment. Conversely, inhibition of CaSR suppressed PERK-ATF4-CHOP pathway and alleviated cognitive impairment.
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Affiliation(s)
- Cancan You
- Department of Pediatric Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China; Clinical Medicine, The Second School of Medicine, Wenzhou Medical University, Wenzhou 325000, China
| | - Zilong Zhang
- Department of Pediatric Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China; Clinical Medicine, The Second School of Medicine, Wenzhou Medical University, Wenzhou 325000, China
| | - Huiya Ying
- Department of Pediatric Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China; Clinical Medicine, The Second School of Medicine, Wenzhou Medical University, Wenzhou 325000, China
| | - Zijing Yang
- Department of Pediatric Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China; Clinical Medicine, The Second School of Medicine, Wenzhou Medical University, Wenzhou 325000, China
| | - Yixuan Ma
- Department of Pediatric Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China; Clinical Medicine, The Second School of Medicine, Wenzhou Medical University, Wenzhou 325000, China
| | - Jingyi Hong
- Department of Pediatric Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China; Clinical Medicine, The Second School of Medicine, Wenzhou Medical University, Wenzhou 325000, China
| | - Mingjie Xue
- Department of Pediatric Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China; Clinical Medicine, The Second School of Medicine, Wenzhou Medical University, Wenzhou 325000, China
| | - Xuan Li
- Department of Pediatric Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China; Clinical Medicine, The Second School of Medicine, Wenzhou Medical University, Wenzhou 325000, China
| | - Huimin Li
- Department of Pediatric Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China; Department of Pediatric, Taizhou Women and Children's Hospital of Wenzhou Medical University, Taizhou 318000, China
| | - Chengrui Zhang
- Department of Pediatric Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China; Clinical Medicine, The Second School of Medicine, Wenzhou Medical University, Wenzhou 325000, China
| | - Wei Wang
- Department of Pediatric Orthopedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China.
| | - Xiaohong Cai
- Department of Pediatric Sleep, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China.
| | - Xiucui Li
- Department of Pediatric Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China.
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Szaruga M, Janssen DA, de Miguel C, Hodgson G, Fatalska A, Pitera AP, Andreeva A, Bertolotti A. Activation of the integrated stress response by inhibitors of its kinases. Nat Commun 2023; 14:5535. [PMID: 37684277 PMCID: PMC10491595 DOI: 10.1038/s41467-023-40823-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 08/10/2023] [Indexed: 09/10/2023] Open
Abstract
Phosphorylation of the translation initiation factor eIF2α to initiate the integrated stress response (ISR) is a vital signalling event. Protein kinases activating the ISR, including PERK and GCN2, have attracted considerable attention for drug development. Here we find that the widely used ATP-competitive inhibitors of PERK, GSK2656157, GSK2606414 and AMG44, inhibit PERK in the nanomolar range, but surprisingly activate the ISR via GCN2 at micromolar concentrations. Similarly, a PKR inhibitor, C16, also activates GCN2. Conversely, GCN2 inhibitor A92 silences its target but induces the ISR via PERK. These findings are pivotal for understanding ISR biology and its therapeutic manipulations because most preclinical studies used these inhibitors at micromolar concentrations. Reconstitution of ISR activation with recombinant proteins demonstrates that PERK and PKR inhibitors directly activate dimeric GCN2, following a Gaussian activation-inhibition curve, with activation driven by allosterically increasing GCN2 affinity for ATP. The tyrosine kinase inhibitors Neratinib and Dovitinib also activate GCN2 by increasing affinity of GCN2 for ATP. Thus, the mechanism uncovered here might be broadly relevant to ATP-competitive inhibitors and perhaps to other kinases.
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Affiliation(s)
- Maria Szaruga
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Dino A Janssen
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Claudia de Miguel
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - George Hodgson
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Agnieszka Fatalska
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Aleksandra P Pitera
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Antonina Andreeva
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Anne Bertolotti
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK.
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20
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Di Conza G, Ho PC, Cubillos-Ruiz JR, Huang SCC. Control of immune cell function by the unfolded protein response. Nat Rev Immunol 2023; 23:546-562. [PMID: 36755160 DOI: 10.1038/s41577-023-00838-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/13/2023] [Indexed: 02/10/2023]
Abstract
Initiating and maintaining optimal immune responses requires high levels of protein synthesis, folding, modification and trafficking in leukocytes, which are processes orchestrated by the endoplasmic reticulum. Importantly, diverse extracellular and intracellular conditions can compromise the protein-handling capacity of this organelle, inducing a state of 'endoplasmic reticulum stress' that activates the unfolded protein response (UPR). Emerging evidence shows that physiological or pathological activation of the UPR can have effects on immune cell survival, metabolism, function and fate. In this Review, we discuss the canonical role of the adaptive UPR in immune cells and how dysregulation of this pathway in leukocytes contributes to diverse pathologies such as cancer, autoimmunity and metabolic disorders. Furthermore, we provide an overview as to how pharmacological approaches that modulate the UPR could be harnessed to control or activate immune cell function in disease.
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Affiliation(s)
- Giusy Di Conza
- Department of Fundamental Oncology, University of Lausanne, Lausanne, Switzerland
- Ludwig Institute for Cancer Research, University of Lausanne, Epalinges, Switzerland
| | - Ping-Chih Ho
- Department of Fundamental Oncology, University of Lausanne, Lausanne, Switzerland.
- Ludwig Institute for Cancer Research, University of Lausanne, Epalinges, Switzerland.
| | - Juan R Cubillos-Ruiz
- Department of Obstetrics and Gynecology, Weill Cornell Medicine, New York, NY, USA.
- Sandra and Edward Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA.
- Immunology and Microbial Pathogenesis Program, Graduate School of Medical Sciences, Weill Cornell Medicine, New York, NY, USA.
| | - Stanley Ching-Cheng Huang
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
- Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
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21
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Siwecka N, Saramowicz K, Galita G, Rozpędek-Kamińska W, Majsterek I. Inhibition of Protein Aggregation and Endoplasmic Reticulum Stress as a Targeted Therapy for α-Synucleinopathy. Pharmaceutics 2023; 15:2051. [PMID: 37631265 PMCID: PMC10459316 DOI: 10.3390/pharmaceutics15082051] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/22/2023] [Accepted: 07/28/2023] [Indexed: 08/27/2023] Open
Abstract
α-synuclein (α-syn) is an intrinsically disordered protein abundant in the central nervous system. Physiologically, the protein regulates vesicle trafficking and neurotransmitter release in the presynaptic terminals. Pathologies related to misfolding and aggregation of α-syn are referred to as α-synucleinopathies, and they constitute a frequent cause of neurodegeneration. The most common α-synucleinopathy, Parkinson's disease (PD), is caused by abnormal accumulation of α-syn in the dopaminergic neurons of the midbrain. This results in protein overload, activation of endoplasmic reticulum (ER) stress, and, ultimately, neural cell apoptosis and neurodegeneration. To date, the available treatment options for PD are only symptomatic and rely on dopamine replacement therapy or palliative surgery. As the prevalence of PD has skyrocketed in recent years, there is a pending issue for development of new disease-modifying strategies. These include anti-aggregative agents that target α-syn directly (gene therapy, small molecules and immunization), indirectly (modulators of ER stress, oxidative stress and clearance pathways) or combine both actions (natural compounds). Herein, we provide an overview on the characteristic features of the structure and pathogenic mechanisms of α-syn that could be targeted with novel molecular-based therapies.
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Affiliation(s)
| | | | | | | | - Ireneusz Majsterek
- Department of Clinical Chemistry and Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland; (N.S.); (K.S.); (G.G.); (W.R.-K.)
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22
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Espina M, Di Franco N, Brañas-Navarro M, Navarro IR, Brito V, Lopez-Molina L, Costas-Insua C, Guzmán M, Ginés S. The GRP78-PERK axis contributes to memory and synaptic impairments in Huntington's disease R6/1 mice. Neurobiol Dis 2023:106225. [PMID: 37442396 DOI: 10.1016/j.nbd.2023.106225] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 07/07/2023] [Accepted: 07/10/2023] [Indexed: 07/15/2023] Open
Abstract
Increasing evidence indicates that a key factor in neurodegenerative diseases is the activation of the unfolded protein response (UPR) caused by an accumulation of misfolded proteins in the endoplasmic reticulum (ER stress). Particularly, in Huntington's disease (HD) mutant huntingtin (mHtt) toxicity involves disruption of the ER-associated degradation pathway and loss of the ER protein homeostasis leading to neuronal dysfunction and degeneration. Besides the role of the UPR in regulating cell survival and death, studies that demonstrate the contribution of sustained UPR activation, particularly of PERK signaling, in memory disturbances and synaptic plasticity deficiencies are emerging. Given the contribution of hippocampal dysfunction to emotional and cognitive deficits seen in HD, we have analyzed the involvement of ER stress in HD memory alterations. We have demonstrated that at early disease stages, ER stress activation manifested as an increase in GRP78 and CHOP is observed in the hippocampus of R6/1 mice. Genetic reduction of GRP78 expression resulted in preventing hippocampal-dependent memory alterations but no motor deficits. Accordingly, hippocampal neuropathology namely, dendritic spine loss and accumulation of mHtt aggregates was ameliorated by GRP78 reduction. To elucidate the signaling pathways, we found that the inactivation of PERK by GSK2606414 restored spatial and recognition memories in R6/1 mice and rescued dendritic spine density in CA1 pyramidal neurons and protein levels of some specific immediate early genes. Our study unveils the critical role of the GRP78/PERK axis in memory impairment in HD mice and suggests the modulation of PERK activation as a novel therapeutic target for HD intervention.
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Affiliation(s)
- Marc Espina
- Departament de Biomedicina, Facultat de Medicina, Institut de Neurociències, Universitat de Barcelona, Barcelona 08036, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona 08036, Spain; Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid 28031, Spain
| | - Nadia Di Franco
- Departament de Biomedicina, Facultat de Medicina, Institut de Neurociències, Universitat de Barcelona, Barcelona 08036, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona 08036, Spain; Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid 28031, Spain
| | - Martina Brañas-Navarro
- Departament de Biomedicina, Facultat de Medicina, Institut de Neurociències, Universitat de Barcelona, Barcelona 08036, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona 08036, Spain
| | - Irene Rodriguez Navarro
- Departament de Biomedicina, Facultat de Medicina, Institut de Neurociències, Universitat de Barcelona, Barcelona 08036, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona 08036, Spain; Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid 28031, Spain
| | - Veronica Brito
- Departament de Biomedicina, Facultat de Medicina, Institut de Neurociències, Universitat de Barcelona, Barcelona 08036, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona 08036, Spain; Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid 28031, Spain
| | - Laura Lopez-Molina
- Departament de Biomedicina, Facultat de Medicina, Institut de Neurociències, Universitat de Barcelona, Barcelona 08036, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona 08036, Spain; Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid 28031, Spain
| | - Carlos Costas-Insua
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid 28031, Spain; Instituto Universitario de Investigación Neuroquímica (IUIN), Universidad Complutense, Madrid 28040, Spain; Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid 28034, Spain
| | - Manuel Guzmán
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid 28031, Spain; Instituto Universitario de Investigación Neuroquímica (IUIN), Universidad Complutense, Madrid 28040, Spain; Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid 28034, Spain
| | - Silvia Ginés
- Departament de Biomedicina, Facultat de Medicina, Institut de Neurociències, Universitat de Barcelona, Barcelona 08036, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona 08036, Spain; Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid 28031, Spain.
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23
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Hafycz JM, Strus E, Naidoo NN. Early and late chaperone intervention therapy boosts XBP1s and ADAM10, restores proteostasis, and rescues learning in Alzheimer's Disease mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.23.541973. [PMID: 37292838 PMCID: PMC10245863 DOI: 10.1101/2023.05.23.541973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Alzheimer's disease (AD) is a debilitating neurodegenerative disorder that is pervasive among the aging population. Two distinct phenotypes of AD are deficits in cognition and proteostasis, including chronic activation of the unfolded protein response (UPR) and aberrant Aβ production. It is unknown if restoring proteostasis by reducing chronic and aberrant UPR activation in AD can improve pathology and cognition. Here, we present data using an APP knock-in mouse model of AD and several protein chaperone supplementation paradigms, including a late-stage intervention. We show that supplementing protein chaperones systemically and locally in the hippocampus reduces PERK signaling and increases XBP1s, which is associated with increased ADAM10 and decreased Aβ42. Importantly, chaperone treatment improves cognition which is correlated with increased CREB phosphorylation and BDNF. Together, this data suggests that chaperone treatment restores proteostasis in a mouse model of AD and that this restoration is associated with improved cognition and reduced pathology. One-sentence summary Chaperone therapy in a mouse model of Alzheimer's disease improves cognition by reducing chronic UPR activity.
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24
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Barker S, Paul BD, Pieper AA. Increased Risk of Aging-Related Neurodegenerative Disease after Traumatic Brain Injury. Biomedicines 2023; 11:1154. [PMID: 37189772 PMCID: PMC10135798 DOI: 10.3390/biomedicines11041154] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/30/2023] [Accepted: 04/05/2023] [Indexed: 05/17/2023] Open
Abstract
Traumatic brain injury (TBI) survivors frequently suffer from chronically progressive complications, including significantly increased risk of developing aging-related neurodegenerative disease. As advances in neurocritical care increase the number of TBI survivors, the impact and awareness of this problem are growing. The mechanisms by which TBI increases the risk of developing aging-related neurodegenerative disease, however, are not completely understood. As a result, there are no protective treatments for patients. Here, we review the current literature surrounding the epidemiology and potential mechanistic relationships between brain injury and aging-related neurodegenerative disease. In addition to increasing the risk for developing all forms of dementia, the most prominent aging-related neurodegenerative conditions that are accelerated by TBI are amyotrophic lateral sclerosis (ALS), frontotemporal dementia (FTD), Parkinson's disease (PD), and Alzheimer's disease (AD), with ALS and FTD being the least well-established. Mechanistic links between TBI and all forms of dementia that are reviewed include oxidative stress, dysregulated proteostasis, and neuroinflammation. Disease-specific mechanistic links with TBI that are reviewed include TAR DNA binding protein 43 and motor cortex lesions in ALS and FTD; alpha-synuclein, dopaminergic cell death, and synergistic toxin exposure in PD; and brain insulin resistance, amyloid beta pathology, and tau pathology in AD. While compelling mechanistic links have been identified, significantly expanded investigation in the field is needed to develop therapies to protect TBI survivors from the increased risk of aging-related neurodegenerative disease.
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Affiliation(s)
- Sarah Barker
- Center for Brain Health Medicines, Harrington Discovery Institute, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA;
- Department of Psychiatry, Case Western Reserve University, Cleveland, OH 44106, USA
- Geriatric Psychiatry, GRECC, Louis Stokes Cleveland VA Medical Center, Cleveland, OH 44106, USA
- Institute for Transformative Molecular Medicine, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Bindu D. Paul
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21211, USA;
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21211, USA
- The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21211, USA
- Lieber Institute for Brain Development, Baltimore, MD 21205, USA
| | - Andrew A. Pieper
- Center for Brain Health Medicines, Harrington Discovery Institute, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA;
- Department of Psychiatry, Case Western Reserve University, Cleveland, OH 44106, USA
- Geriatric Psychiatry, GRECC, Louis Stokes Cleveland VA Medical Center, Cleveland, OH 44106, USA
- Institute for Transformative Molecular Medicine, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
- Department of Neuroscience, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
- Translational Therapeutics Core, Cleveland Alzheimer’s Disease Research Center, Cleveland, OH 44106, USA
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25
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Aychman MM, Goldman DL, Kaplan JS. Cannabidiol's neuroprotective properties and potential treatment of traumatic brain injuries. Front Neurol 2023; 14:1087011. [PMID: 36816569 PMCID: PMC9932048 DOI: 10.3389/fneur.2023.1087011] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 01/17/2023] [Indexed: 02/05/2023] Open
Abstract
Cannabidiol (CBD) has numerous pharmacological targets that initiate anti-inflammatory, antioxidative, and antiepileptic properties. These neuroprotective benefits have generated interest in CBD's therapeutic potential against the secondary injury cascade from traumatic brain injury (TBI). There are currently no effective broad treatment strategies for combating the damaging mechanisms that follow the primary injury and lead to lasting neurological consequences or death. However, CBD's effects on different neurotransmitter systems, the blood brain barrier, oxidative stress mechanisms, and the inflammatory response provides mechanistic support for CBD's clinical utility in TBI. This review describes the cascades of damage caused by TBI and CBD's neuroprotective mechanisms to counter them. We also present challenges in the clinical treatment of TBI and discuss important future clinical research directions for integrating CBD in treatment protocols. The mechanistic evidence provided by pre-clinical research shows great potential for CBD as a much-needed improvement in the clinical treatment of TBI. Upcoming clinical trials sponsored by major professional sport leagues are the first attempts to test the efficacy of CBD in head injury treatment protocols and highlight the need for further clinical research.
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26
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Single-cell RNA sequencing reveals the suppressive effect of PPP1R15A inhibitor Sephin1 in antitumor immunity. iScience 2023; 26:105954. [PMID: 36718369 PMCID: PMC9883195 DOI: 10.1016/j.isci.2023.105954] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/28/2022] [Accepted: 01/06/2023] [Indexed: 01/15/2023] Open
Abstract
Protein phosphatase 1 regulatory subunit 15A (PPP1R15A) is an important factor in the integrated stress response (ISR) in mammals and may play a crucial role in tumorigenesis. In our studies, we found an inhibitor of PPP1R15A, Sephin1, plays a protumorigenic role in mouse tumor models. By analyzing the single-cell transcriptome data of the mouse tumor models, we found that in C57BL/6 mice, Sephin1 treatment could lead to higher levels of ISR activity and lower levels of antitumor immune activities. Specifically, Sephin1 treatment caused reductions in antitumor immune cell types and lower expression levels of cytotoxicity-related genes. In addition, T cell receptor (TCR) repertoire analysis demonstrated that the clonal expansion of tumor-specific T cells was inhibited by Sephin1. A special TCR + macrophage subtype in tumor was identified to be significantly depleted upon Sephin1 treatment, implying its key antitumor role. These results suggest that PPP1R15A has the potential to be an effective target for tumor therapy.
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27
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Saaoud F, Liu L, Xu K, Cueto R, Shao Y, Lu Y, Sun Y, Snyder NW, Wu S, Yang L, Zhou Y, Williams DL, Li C, Martinez L, Vazquez-Padron RI, Zhao H, Jiang X, Wang H, Yang X. Aorta- and liver-generated TMAO enhances trained immunity for increased inflammation via ER stress/mitochondrial ROS/glycolysis pathways. JCI Insight 2023; 8:e158183. [PMID: 36394956 PMCID: PMC9870092 DOI: 10.1172/jci.insight.158183] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 11/16/2022] [Indexed: 11/18/2022] Open
Abstract
We determined whether gut microbiota-produced trimethylamine (TMA) is oxidized into trimethylamine N-oxide (TMAO) in nonliver tissues and whether TMAO promotes inflammation via trained immunity (TI). We found that endoplasmic reticulum (ER) stress genes were coupregulated with MitoCarta genes in chronic kidney diseases (CKD); TMAO upregulated 190 genes in human aortic endothelial cells (HAECs); TMAO synthesis enzyme flavin-containing monooxygenase 3 (FMO3) was expressed in human and mouse aortas; TMAO transdifferentiated HAECs into innate immune cells; TMAO phosphorylated 12 kinases in cytosol via its receptor PERK and CREB, and integrated with PERK pathways; and PERK inhibitors suppressed TMAO-induced ICAM-1. TMAO upregulated 3 mitochondrial genes, downregulated inflammation inhibitor DARS2, and induced mitoROS, and mitoTEMPO inhibited TMAO-induced ICAM-1. β-Glucan priming, followed by TMAO restimulation, upregulated TNF-α by inducing metabolic reprogramming, and glycolysis inhibitor suppressed TMAO-induced ICAM-1. Our results have provided potentially novel insights regarding TMAO roles in inducing EC activation and innate immune transdifferentiation and inducing metabolic reprogramming and TI for enhanced vascular inflammation, and they have provided new therapeutic targets for treating cardiovascular diseases (CVD), CKD-promoted CVD, inflammation, transplantation, aging, and cancer.
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Affiliation(s)
| | - Lu Liu
- Metabolic Disease Research and Thrombosis Research, Department of Cardiovascular Sciences, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Keman Xu
- Centers for Cardiovascular Research and
| | - Ramon Cueto
- Metabolic Disease Research and Thrombosis Research, Department of Cardiovascular Sciences, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Ying Shao
- Centers for Cardiovascular Research and
| | - Yifan Lu
- Centers for Cardiovascular Research and
| | - Yu Sun
- Centers for Cardiovascular Research and
| | - Nathaniel W. Snyder
- Metabolic Disease Research and Thrombosis Research, Department of Cardiovascular Sciences, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Sheng Wu
- Metabolic Disease Research and Thrombosis Research, Department of Cardiovascular Sciences, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Ling Yang
- Department of Medical Genetics and Molecular Biochemistry, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Yan Zhou
- Biostatistics and Bioinformatics Facility, Fox Chase Cancer Center, Temple Health, Philadelphia, Pennsylvania, USA
| | - David L. Williams
- Department of Surgery, Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
| | - Chuanfu Li
- Department of Surgery, Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
| | - Laisel Martinez
- DeWitt Daughtry Family Department of Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Roberto I. Vazquez-Padron
- DeWitt Daughtry Family Department of Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Huaqing Zhao
- Center for Biostatistics and Epidemiology, Department of Biomedical Education and Data Science, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Xiaohua Jiang
- Centers for Cardiovascular Research and
- Metabolic Disease Research and Thrombosis Research, Department of Cardiovascular Sciences, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Hong Wang
- Metabolic Disease Research and Thrombosis Research, Department of Cardiovascular Sciences, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Xiaofeng Yang
- Centers for Cardiovascular Research and
- Metabolic Disease Research and Thrombosis Research, Department of Cardiovascular Sciences, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
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28
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Song S, Hasan MN, Yu L, Paruchuri SS, Bielanin JP, Metwally S, Oft HCM, Fischer SG, Fiesler VM, Sen T, Gupta RK, Foley LM, Hitchens TK, Dixon CE, Cambi F, Sen N, Sun D. Microglial-oligodendrocyte interactions in myelination and neurological function recovery after traumatic brain injury. J Neuroinflammation 2022; 19:246. [PMID: 36199097 PMCID: PMC9533529 DOI: 10.1186/s12974-022-02608-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 09/23/2022] [Indexed: 11/10/2022] Open
Abstract
Differential microglial inflammatory responses play a role in regulation of differentiation and maturation of oligodendrocytes (OLs) in brain white matter. How microglia-OL crosstalk is altered by traumatic brain injury (TBI) and its impact on axonal myelination and neurological function impairment remain poorly understood. In this study, we investigated roles of a Na+/H+ exchanger (NHE1), an essential microglial pH regulatory protein, in microglial proinflammatory activation and OL survival and differentiation in a murine TBI model induced by controlled cortical impact. Similar TBI-induced contusion volumes were detected in the Cx3cr1-CreERT2 control (Ctrl) mice and selective microglial Nhe1 knockout (Cx3cr1-CreERT2;Nhe1flox/flox, Nhe1 cKO) mice. Compared to the Ctrl mice, the Nhe1 cKO mice displayed increased resistance to initial TBI-induced white matter damage and accelerated chronic phase of OL regeneration at 30 days post-TBI. The cKO brains presented increased anti-inflammatory phenotypes of microglia and infiltrated myeloid cells, with reduced proinflammatory transcriptome profiles. Moreover, the cKO mice exhibited accelerated post-TBI sensorimotor and cognitive functional recovery than the Ctrl mice. These phenotypic outcomes in cKO mice were recapitulated in C57BL6J wild-type TBI mice receiving treatment of a potent NHE1 inhibitor HOE642 for 1-7 days post-TBI. Taken together, these findings collectively demonstrated that blocking NHE1 protein stimulates restorative microglial activation in oligodendrogenesis and neuroprotection, which contributes to accelerated brain repair and neurological function recovery after TBI.
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Affiliation(s)
- Shanshan Song
- Department of Neurology, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA, 15213, USA.,Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA.,Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, 15213, USA
| | - Md Nabiul Hasan
- Department of Neurology, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA, 15213, USA.,Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA.,Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, 15213, USA
| | - Lauren Yu
- Department of Neurology, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA, 15213, USA.,Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Satya S Paruchuri
- Department of Neurology, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA, 15213, USA.,Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - John P Bielanin
- Department of Neurology, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA, 15213, USA.,Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Shamseldin Metwally
- Department of Neurology, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA, 15213, USA.,Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Helena C M Oft
- Department of Neurology, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA, 15213, USA.,Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Sydney G Fischer
- Department of Neurology, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA, 15213, USA.,Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Victoria M Fiesler
- Department of Neurology, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA, 15213, USA.,Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA.,Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, 15213, USA
| | - Tanusree Sen
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Rajaneesh K Gupta
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Lesley M Foley
- Animal Imaging Center, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - T Kevin Hitchens
- Animal Imaging Center, University of Pittsburgh, Pittsburgh, PA, 15213, USA.,Department of Neurobiology, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - C Edward Dixon
- Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, 15213, USA.,Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Franca Cambi
- Department of Neurology, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA, 15213, USA.,Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA.,Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, 15213, USA
| | - Nilkantha Sen
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Dandan Sun
- Department of Neurology, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA, 15213, USA. .,Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA. .,Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, 15213, USA.
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29
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Xu Z, Zhang J, Wu J, Yang S, Li Y, Wu Y, Li S, Zhang X, Zuo W, Lian X, Lin J, Jiang Y, Xie L, Liu Y, Wang P. Lactobacillus plantarum ST-III culture supernatant ameliorates alcohol-induced cognitive dysfunction by reducing endoplasmic reticulum stress and oxidative stress. Front Neurosci 2022; 16:976358. [PMID: 36188464 PMCID: PMC9515438 DOI: 10.3389/fnins.2022.976358] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/15/2022] [Indexed: 11/28/2022] Open
Abstract
Background Long-term alcohol exposure is associated with oxidative stress, endoplasmic reticulum (ER) stress, and neuroinflammation, which may impair cognitive function. Probiotics supplements can significantly improve cognitive function in neurodegenerative diseases such as Alzheimer’s disease. Nevertheless, the effect of Lactobacillus plantarum ST-III culture supernatant (LP-cs) on alcohol-induced cognitive dysfunction remains unclear. Methods A mouse model of cognitive dysfunction was established by intraperitoneal injection of alcohol (2 g/kg body weight) for 28 days. Mice were pre-treated with LP-cs, and cognitive function was evaluated using the Morris water maze test. Hippocampal tissues were collected for biochemical and molecular analysis. Results LP-cs significantly ameliorated alcohol-induced decline in learning and memory function and hippocampal morphology changes, neuronal apoptosis, and synaptic dysfunction. A mechanistic study showed that alcohol activated protein kinase R-like endoplasmic reticulum kinase (PERK) signaling and suppressed brain derived neurotrophic factor (BDNF) levels via ER stress in the hippocampus, which LP-cs reversed. Alcohol activated oxidative stress and inflammation responses in the hippocampus, which LP-cs reversed. Conclusion LP-cs significantly ameliorated alcohol-induced cognitive dysfunction and cellular stress. LP-cs might serve as an effective treatment for alcohol-induced cognitive dysfunction.
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Affiliation(s)
- Zeping Xu
- Department of Pharmacy, Ningbo Medical Center Li Huili Hospital, The Affiliated Hospital of Ningbo University, Ningbo, China
| | - Jinjing Zhang
- Department of Pharmacy, Affiliated Cixi Hospital, Wenzhou Medical University, Wenzhou, China
| | - Junnan Wu
- School of Mental Health, Wenzhou Medical University, Wenzhou, China
- The Affiliated Kangning Hospital, Wenzhou Medical University, Wenzhou, China
| | - Shizhuo Yang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Yuying Li
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Yuyu Wu
- School of Mental Health, Wenzhou Medical University, Wenzhou, China
| | - Siyuan Li
- School of Mental Health, Wenzhou Medical University, Wenzhou, China
| | - Xie Zhang
- Department of Pharmacy, Ningbo Medical Center Li Huili Hospital, The Affiliated Hospital of Ningbo University, Ningbo, China
| | - Wei Zuo
- The Affiliated Xiangshan Hospital of Wenzhou Medical University, Ningbo, China
| | - Xiang Lian
- The Affiliated Xiangshan Hospital of Wenzhou Medical University, Ningbo, China
| | - Jianjun Lin
- The Affiliated Xiangshan Hospital of Wenzhou Medical University, Ningbo, China
| | - Yongsheng Jiang
- The Affiliated Xiangshan Hospital of Wenzhou Medical University, Ningbo, China
| | - Longteng Xie
- The Affiliated Xiangshan Hospital of Wenzhou Medical University, Ningbo, China
- Longteng Xie,
| | - Yanlong Liu
- School of Mental Health, Wenzhou Medical University, Wenzhou, China
- The Affiliated Kangning Hospital, Wenzhou Medical University, Wenzhou, China
- *Correspondence: Yanlong Liu,
| | - Ping Wang
- The Affiliated Kangning Hospital, Wenzhou Medical University, Wenzhou, China
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
- Ping Wang,
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30
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Obed C, Wu M, Chen Y, An R, Cai H, Luo Q, Yu L, Wang J, Liu F, Shen J, Du J. Toxoplasma gondii dense granule protein 3 promotes endoplasmic reticulum stress-induced apoptosis by activating the PERK pathway. Parasit Vectors 2022; 15:276. [PMID: 35918751 PMCID: PMC9344675 DOI: 10.1186/s13071-022-05394-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 07/11/2022] [Indexed: 11/10/2022] Open
Abstract
Background Toxoplasma gondii is a neurotropic single-celled parasite that can infect mammals, including humans. Central nervous system infection with T. gondii infection can lead to Toxoplasma encephalitis. Toxoplasma infection can cause endoplasmic reticulum (ER) stress and unfolded protein response (UPR) activation, which ultimately can lead to apoptosis of host cells. The dense granule protein GRA3 has been identified as one of the secretory proteins that contribute to the virulence of T. gondii; however, the mechanism remains enigmatic. Methods The expression of the GRA3 gene in RH, ME49, Wh3, and Wh6 strains was determined using quantitative real-time polymerase chain reaction (qRT–PCR). pEGFP-GRA3Wh6 was constructed by inserting Chinese 1 Wh6 GRA3 (GRA3Wh6) cDNA into a plasmid encoding the enhanced GFP. Mouse neuro2a (N2a) cells were transfected with either pEGFP or pEGFP-GRA3Wh6 (GRA3Wh6) and incubated for 24–36 h. N2a cell apoptosis and ER stress-associated proteins were determined using flow cytometry and immunoblotting. Furthermore, N2a cells were pretreated with GSK2656157 (a PERK inhibitor) and Z-ATAD-FMK (a caspase-12 inhibitor) before GRA3Wh6 transfection, and the effect of the inhibitors on GRA3Wh6-induced ER stress and apoptosis were investigated. Results GRA3 gene expression was higher in the less virulent strains of type II ME49 and type Chinese 1 Wh6 strains compared with the virulent strains of type I RH strain and type Chinese 1 Wh3 strain. Transfection with GRA3Wh6 plasmid induced neuronal apoptosis and increased the expression of GRP78, p-PERK, cleaved caspase-12, cleaved caspase-3, and CHOP compared with the control vector. Pretreatment with GSK2656157 and Z-ATAD-FMK decreased apoptosis in N2a cells, and similarly, ER stress- and apoptosis-associated protein levels were significantly decreased. Conclusion GRA3 induces neural cell apoptosis via the ER stress signaling pathway, which could play a role in toxoplasmic encephalitis. Graphical Abstract ![]()
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Affiliation(s)
- Cudjoe Obed
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,The Research Center for Infectious Diseases, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,The Provincial Key Laboratory of Zoonoses of High Institutions in Anhui, Anhui Medical University, Hefei, 230032, China.,The Key Laboratory of Microbiology and Parasitology of Anhui Province, Anhui Medical University, Hefei, 230032, China.,Department of Microbiology & Immunology School of Medical Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Minmin Wu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,The Research Center for Infectious Diseases, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,The Provincial Key Laboratory of Zoonoses of High Institutions in Anhui, Anhui Medical University, Hefei, 230032, China.,The Key Laboratory of Microbiology and Parasitology of Anhui Province, Anhui Medical University, Hefei, 230032, China
| | - Ying Chen
- The Research Center for Infectious Diseases, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,School of Nursing, Anhui Medical University, Hefei, 230032, China
| | - Ran An
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,The Research Center for Infectious Diseases, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,The Provincial Key Laboratory of Zoonoses of High Institutions in Anhui, Anhui Medical University, Hefei, 230032, China.,The Key Laboratory of Microbiology and Parasitology of Anhui Province, Anhui Medical University, Hefei, 230032, China
| | - Haijian Cai
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,The Research Center for Infectious Diseases, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,The Provincial Key Laboratory of Zoonoses of High Institutions in Anhui, Anhui Medical University, Hefei, 230032, China.,The Key Laboratory of Microbiology and Parasitology of Anhui Province, Anhui Medical University, Hefei, 230032, China
| | - Qingli Luo
- The Provincial Key Laboratory of Zoonoses of High Institutions in Anhui, Anhui Medical University, Hefei, 230032, China.,The Key Laboratory of Microbiology and Parasitology of Anhui Province, Anhui Medical University, Hefei, 230032, China
| | - Li Yu
- The Research Center for Infectious Diseases, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,The Provincial Key Laboratory of Zoonoses of High Institutions in Anhui, Anhui Medical University, Hefei, 230032, China.,The Key Laboratory of Microbiology and Parasitology of Anhui Province, Anhui Medical University, Hefei, 230032, China
| | - Jie Wang
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,The Research Center for Infectious Diseases, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,The Provincial Key Laboratory of Zoonoses of High Institutions in Anhui, Anhui Medical University, Hefei, 230032, China.,The Key Laboratory of Microbiology and Parasitology of Anhui Province, Anhui Medical University, Hefei, 230032, China
| | - Fang Liu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,The Research Center for Infectious Diseases, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.,The Provincial Key Laboratory of Zoonoses of High Institutions in Anhui, Anhui Medical University, Hefei, 230032, China.,The Key Laboratory of Microbiology and Parasitology of Anhui Province, Anhui Medical University, Hefei, 230032, China
| | - Jilong Shen
- The Provincial Key Laboratory of Zoonoses of High Institutions in Anhui, Anhui Medical University, Hefei, 230032, China. .,The Key Laboratory of Microbiology and Parasitology of Anhui Province, Anhui Medical University, Hefei, 230032, China.
| | - Jian Du
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China. .,The Research Center for Infectious Diseases, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China. .,The Provincial Key Laboratory of Zoonoses of High Institutions in Anhui, Anhui Medical University, Hefei, 230032, China. .,The Key Laboratory of Microbiology and Parasitology of Anhui Province, Anhui Medical University, Hefei, 230032, China.
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31
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Hafycz JM, Strus E, Naidoo N. Reducing ER stress with chaperone therapy reverses sleep fragmentation and cognitive decline in aged mice. Aging Cell 2022; 21:e13598. [PMID: 35488730 PMCID: PMC9197403 DOI: 10.1111/acel.13598] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 01/03/2023] Open
Abstract
As the aging population grows, the need to understand age-related changes in health is vital. Two prominent behavioral changes that occur with age are disrupted sleep and impaired cognition. Sleep disruptions lead to perturbations in proteostasis and endoplasmic reticulum (ER) stress in mice. Further, consolidated sleep and protein synthesis are necessary for memory formation. With age, the molecular mechanisms that relieve cellular stress and ensure proper protein folding become less efficient. It is unclear if a causal relationship links proteostasis, sleep quality, and cognition in aging. Here, we used a mouse model of aging to determine if supplementing chaperone levels reduces ER stress and improves sleep quality and memory. We administered the chemical chaperone 4-phenyl butyrate (PBA) to aged and young mice, and monitored sleep and cognitive behavior. We found that chaperone treatment consolidates sleep and wake, and improves learning in aged mice. These data correlate with reduced ER stress in the cortex and hippocampus of aged mice. Chaperone treatment increased p-CREB, which is involved in memory formation and synaptic plasticity, in hippocampi of chaperone-treated aged mice. Hippocampal overexpression of the endogenous chaperone, binding immunoglobulin protein (BiP), improved cognition, reduced ER stress, and increased p-CREB in aged mice, suggesting that supplementing BiP levels are sufficient to restore some cognitive function. Together, these results indicate that restoring proteostasis improves sleep and cognition in a wild-type mouse model of aging. The implications of these results could have an impact on the development of therapies to improve health span across the aging population.
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Affiliation(s)
- Jennifer M. Hafycz
- Chronobiology and Sleep Institute and Department of MedicinePerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPennsylvaniaUSA
| | - Ewa Strus
- Chronobiology and Sleep Institute and Department of MedicinePerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPennsylvaniaUSA
| | - Nirinjini Naidoo
- Chronobiology and Sleep Institute and Department of MedicinePerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPennsylvaniaUSA
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32
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Chen YL, Tong L, Chen Y, Fu CH, Peng JB, Ji LL. MiR-153 downregulation alleviates PTSD-like behaviors and reduces cell apoptosis by upregulating the Sigma-1 receptor in the hippocampus of rats exposed to single-prolonged stress. Exp Neurol 2022; 352:114034. [PMID: 35259352 DOI: 10.1016/j.expneurol.2022.114034] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 02/24/2022] [Accepted: 03/01/2022] [Indexed: 11/17/2022]
Abstract
Posttraumatic stress disorder (PTSD) is a psychiatric disorder that may lead to a series of changes in the central nervous system, including impaired synaptic plasticity, neuronal dendritic spine loss, enhanced apoptosis and increased inflammation. However, the specific mechanism of PTSD has not been studied clearly. In the present study, we found that the level of miR-153-3p in the hippocampus of rats exposed tosingle-prolonged stresss (SPS) was upregulated, but its downstream target σ-1R showed a significant decrease. The downregulation of miR-153 could alleviate the PTSD-like behaviors in the rats exposed to SPS, and this effect might be related to the upregulation of σ-1R and PSD95. Furthermore, anti-miR-153 could also increase the dendritic spine density and reduce cell apoptosis in the hippocampus of SPS rats. In addition, we showed that the mTOR signaling pathway might be involved in the regulation of σ-1R in the hippocampus of rats exposed to SPS. The results of this study indicated that miR-153 might alleviate PTSD-like behaviors by regulating cell morphology and reducing cell apoptosis in the hippocampus of rats exposed to SPS by targeting σ-1R, which might be related to the mTOR signaling pathway.
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Affiliation(s)
- Yu-Lu Chen
- Department of Anatomy, College of Basic Medical Sciences, China Medical University, Shenyang, China
| | - Lei Tong
- Department of Anatomy, College of Basic Medical Sciences, China Medical University, Shenyang, China
| | - Yao Chen
- Department of Anatomy, College of Basic Medical Sciences, China Medical University, Shenyang, China
| | - Chang-Hai Fu
- Department of Anatomy, College of Basic Medical Sciences, China Medical University, Shenyang, China
| | - Jun-Bo Peng
- Department of Anatomy, College of Basic Medical Sciences, China Medical University, Shenyang, China.
| | - Li-Li Ji
- Department of Anatomy, College of Basic Medical Sciences, China Medical University, Shenyang, China.
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33
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Boone M, Wang L, Lawrence RE, Frost A, Walter P, Schoof M. A point mutation in the nucleotide exchange factor eIF2B constitutively activates the integrated stress response by allosteric modulation. eLife 2022; 11:e76171. [PMID: 35416150 PMCID: PMC9132573 DOI: 10.7554/elife.76171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 04/11/2022] [Indexed: 11/13/2022] Open
Abstract
In eukaryotic cells, stressors reprogram the cellular proteome by activating the integrated stress response (ISR). In its canonical form, stress-sensing kinases phosphorylate the eukaryotic translation initiation factor eIF2 (eIF2-P), which ultimately leads to reduced levels of ternary complex required for initiation of mRNA translation. Previously we showed that translational control is primarily exerted through a conformational switch in eIF2's nucleotide exchange factor, eIF2B, which shifts from its active A-State conformation to its inhibited I-State conformation upon eIF2-P binding, resulting in reduced nucleotide exchange on eIF2 (Schoof et al. 2021). Here, we show functionally and structurally how a single histidine to aspartate point mutation in eIF2B's β subunit (H160D) mimics the effects of eIF2-P binding by promoting an I-State like conformation, resulting in eIF2-P independent activation of the ISR. These findings corroborate our previously proposed A/I-State model of allosteric ISR regulation.
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Affiliation(s)
- Morgane Boone
- Howard Hughes Medical Institute, University of California at San FranciscoSan FranciscoUnited States
- Department of Biochemistry and Biophysics, University of California at San FranciscoSan FranciscoUnited States
| | - Lan Wang
- Howard Hughes Medical Institute, University of California at San FranciscoSan FranciscoUnited States
- Department of Biochemistry and Biophysics, University of California at San FranciscoSan FranciscoUnited States
| | - Rosalie E Lawrence
- Howard Hughes Medical Institute, University of California at San FranciscoSan FranciscoUnited States
- Department of Biochemistry and Biophysics, University of California at San FranciscoSan FranciscoUnited States
| | - Adam Frost
- Department of Biochemistry and Biophysics, University of California at San FranciscoSan FranciscoUnited States
- Chan Zuckerberg BiohubSan FranciscoUnited States
| | - Peter Walter
- Howard Hughes Medical Institute, University of California at San FranciscoSan FranciscoUnited States
- Department of Biochemistry and Biophysics, University of California at San FranciscoSan FranciscoUnited States
| | - Michael Schoof
- Howard Hughes Medical Institute, University of California at San FranciscoSan FranciscoUnited States
- Department of Biochemistry and Biophysics, University of California at San FranciscoSan FranciscoUnited States
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34
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Svirin E, Veniaminova E, Costa-Nunes JP, Gorlova A, Umriukhin A, Kalueff AV, Proshin A, Anthony DC, Nedorubov A, Tse ACK, Walitza S, Lim LW, Lesch KP, Strekalova T. Predation Stress Causes Excessive Aggression in Female Mice with Partial Genetic Inactivation of Tryptophan Hydroxylase-2: Evidence for Altered Myelination-Related Processes. Cells 2022; 11:cells11061036. [PMID: 35326487 PMCID: PMC8947002 DOI: 10.3390/cells11061036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/11/2022] [Accepted: 03/15/2022] [Indexed: 01/27/2023] Open
Abstract
The interaction between brain serotonin (5-HT) deficiency and environmental adversity may predispose females to excessive aggression. Specifically, complete inactivation of the gene encoding tryptophan hydroxylase-2 (Tph2) results in the absence of neuronal 5-HT synthesis and excessive aggressiveness in both male and female null mutant (Tph2−/−) mice. In heterozygous male mice (Tph2+/−), there is a moderate reduction in brain 5-HT levels, and when they are exposed to stress, they exhibit increased aggression. Here, we exposed female Tph2+/− mice to a five-day rat predation stress paradigm and assessed their emotionality and social interaction/aggression-like behaviors. Tph2+/− females exhibited excessive aggression and increased dominant behavior. Stressed mutants displayed altered gene expression of the 5-HT receptors Htr1a and Htr2a, glycogen synthase kinase-3 β (GSK-3β), and c-fos as well as myelination-related transcripts in the prefrontal cortex: myelin basic protein (Mbp), proteolipid protein 1 (Plp1), myelin-associated glycoprotein (Mag), and myelin oligodendrocyte glycoprotein (Mog). The expression of the plasticity markers synaptophysin (Syp) and cAMP response element binding protein (Creb), but not AMPA receptor subunit A2 (GluA2), were affected by genotype. Moreover, in a separate experiment, naïve female Tph2+/− mice showed signs of enhanced stress resilience in the modified swim test with repeated swimming sessions. Taken together, the combination of a moderate reduction in brain 5-HT with environmental challenges results in behavioral changes in female mice that resemble the aggression-related behavior and resilience seen in stressed male mutants; additionally, the combination is comparable to the phenotype of null mutants lacking neuronal 5-HT. Changes in myelination-associated processes are suspected to underpin the molecular mechanisms leading to aggressive behavior.
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Affiliation(s)
- Evgeniy Svirin
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, 6200 MD Maastricht, The Netherlands; (E.S.); (K.-P.L.)
- Division of Molecular Psychiatry, Center of Mental Health, University of Würzburg, 97080 Würzburg, Germany
- Institute of General Pathology and Pathophysiology, Russian Academy of Medical Sciences, 125315 Moscow, Russia
| | - Ekaterina Veniaminova
- Laboratory of Psychiatric Neurobiology, Institute of Molecular Medicine and Department of Normal Physiology, Sechenov University, 119991 Moscow, Russia; (E.V.); (J.P.C.-N.); (A.G.); (A.U.); (D.C.A.)
| | - João Pedro Costa-Nunes
- Laboratory of Psychiatric Neurobiology, Institute of Molecular Medicine and Department of Normal Physiology, Sechenov University, 119991 Moscow, Russia; (E.V.); (J.P.C.-N.); (A.G.); (A.U.); (D.C.A.)
- Institute of Molecular Medicine, New University of Lisbon, 1649-028 Lisbon, Portugal
| | - Anna Gorlova
- Laboratory of Psychiatric Neurobiology, Institute of Molecular Medicine and Department of Normal Physiology, Sechenov University, 119991 Moscow, Russia; (E.V.); (J.P.C.-N.); (A.G.); (A.U.); (D.C.A.)
| | - Aleksei Umriukhin
- Laboratory of Psychiatric Neurobiology, Institute of Molecular Medicine and Department of Normal Physiology, Sechenov University, 119991 Moscow, Russia; (E.V.); (J.P.C.-N.); (A.G.); (A.U.); (D.C.A.)
| | - Allan V. Kalueff
- Neuroscience Program, Sirius University, 354340 Sochi, Russia;
- Moscow Institute of Physics and Technology, School of Biological and Medical Physics, 141701 Dolgoprudny, Russia
- Institute of Natural Sciences, Ural Federal University, 620002 Yekaterinburg, Russia
| | - Andrey Proshin
- P.K. Anokhin Research Institute of Normal Physiology, 125315 Moscow, Russia;
| | - Daniel C. Anthony
- Laboratory of Psychiatric Neurobiology, Institute of Molecular Medicine and Department of Normal Physiology, Sechenov University, 119991 Moscow, Russia; (E.V.); (J.P.C.-N.); (A.G.); (A.U.); (D.C.A.)
- Department of Pharmacology, Oxford University, Oxford OX1 3QT, UK
| | - Andrey Nedorubov
- Institute of Translational Medicine and Biotechnology, Sechenov University, 119991 Moscow, Russia;
| | - Anna Chung Kwan Tse
- Li Ka Shing Faculty of Medicine, School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong SAR, China;
| | - Susanne Walitza
- Department for Child and Adolescent Psychiatry and Psychotherapy, University Hospital of Psychiatry Zurich, University of Zurich, 8032 Zurich, Switzerland;
| | - Lee Wei Lim
- Li Ka Shing Faculty of Medicine, School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong SAR, China;
- Correspondence: or (L.W.L.); (T.S.); Tel.: +852-3917-6830 (L.W.L.); +31-43-38-84-108 (T.S.)
| | - Klaus-Peter Lesch
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, 6200 MD Maastricht, The Netherlands; (E.S.); (K.-P.L.)
- Division of Molecular Psychiatry, Center of Mental Health, University of Würzburg, 97080 Würzburg, Germany
- Laboratory of Psychiatric Neurobiology, Institute of Molecular Medicine and Department of Normal Physiology, Sechenov University, 119991 Moscow, Russia; (E.V.); (J.P.C.-N.); (A.G.); (A.U.); (D.C.A.)
| | - Tatyana Strekalova
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, 6200 MD Maastricht, The Netherlands; (E.S.); (K.-P.L.)
- Institute of General Pathology and Pathophysiology, Russian Academy of Medical Sciences, 125315 Moscow, Russia
- Laboratory of Psychiatric Neurobiology, Institute of Molecular Medicine and Department of Normal Physiology, Sechenov University, 119991 Moscow, Russia; (E.V.); (J.P.C.-N.); (A.G.); (A.U.); (D.C.A.)
- Correspondence: or (L.W.L.); (T.S.); Tel.: +852-3917-6830 (L.W.L.); +31-43-38-84-108 (T.S.)
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35
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Shi M, Chai Y, Zhang J, Chen X. Endoplasmic Reticulum Stress-Associated Neuronal Death and Innate Immune Response in Neurological Diseases. Front Immunol 2022; 12:794580. [PMID: 35082783 PMCID: PMC8784382 DOI: 10.3389/fimmu.2021.794580] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 12/17/2021] [Indexed: 12/13/2022] Open
Abstract
Neuronal death and inflammatory response are two common pathological hallmarks of acute central nervous system injury and chronic degenerative disorders, both of which are closely related to cognitive and motor dysfunction associated with various neurological diseases. Neurological diseases are highly heterogeneous; however, they share a common pathogenesis, that is, the aberrant accumulation of misfolded/unfolded proteins within the endoplasmic reticulum (ER). Fortunately, the cell has intrinsic quality control mechanisms to maintain the proteostasis network, such as chaperone-mediated folding and ER-associated degradation. However, when these control mechanisms fail, misfolded/unfolded proteins accumulate in the ER lumen and contribute to ER stress. ER stress has been implicated in nearly all neurological diseases. ER stress initiates the unfolded protein response to restore proteostasis, and if the damage is irreversible, it elicits intracellular cascades of death and inflammation. With the growing appreciation of a functional association between ER stress and neurological diseases and with the improved understanding of the multiple underlying molecular mechanisms, pharmacological and genetic targeting of ER stress are beginning to emerge as therapeutic approaches for neurological diseases.
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Affiliation(s)
- Mingming Shi
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China.,Department of Neurosurgery, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, China
| | - Yan Chai
- Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China.,Department of Neurosurgery, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, China
| | - Jianning Zhang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China.,Department of Neurosurgery, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, China
| | - Xin Chen
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China.,Department of Neurosurgery, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, China
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36
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Du M, Wu C, Yu R, Cheng Y, Tang Z, Wu B, Fu J, Tan W, Zhou Q, Zhu Z, Balawi E, Huang X, Ma J, Liao ZB. A novel circular RNA, circIgfbp2, links neural plasticity and anxiety through targeting mitochondrial dysfunction and oxidative stress-induced synapse dysfunction after traumatic brain injury. Mol Psychiatry 2022; 27:4575-4589. [PMID: 35918398 PMCID: PMC9734054 DOI: 10.1038/s41380-022-01711-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 06/14/2022] [Accepted: 07/14/2022] [Indexed: 12/14/2022]
Abstract
Traumatic brain injury (TBI) can lead to different neurological and psychiatric disorders. Circular RNAs (circRNAs) are highly expressed in the nervous system and enriched in synapses; yet, the underlying role and mechanisms of circRNAs in neurological impairment and dysfunction are still not fully understood. In this study, we investigated the expression of circRNAs and their relation with neurological dysfunction after TBI. RNA-Seq was used to detect differentially expressed circRNAs in injured brain tissue, revealing that circIgfbp2 was significantly increased. Up-regulated hsa_circ_0058195, which was highly homologous to circIgfbp2, was further confirmed in the cerebral cortex specimens and serum samples of patients after TBI. Moreover, correlation analysis showed a positive correlation between hsa_circ_0058195 levels and the Self-Rating Anxiety Scale scores in these subjects. Furthermore, knockdown of circIgfbp2 in mice relieved anxiety-like behaviors and sleep disturbances induced by TBI. Knockdown of circIgfbp2 in H2O2 treated HT22 cells alleviated mitochondrial dysfunction, while its overexpression reversed the process. Mechanistically, we discovered that circIgfbp2 targets miR-370-3p to regulate BACH1, and down-regulating BACH1 alleviated mitochondrial dysfunction and oxidative stress-induced synapse dysfunction. In conclusion, inhibition of circIgfbp2 alleviated mitochondrial dysfunction and oxidative stress-induced synapse dysfunction after TBI through the miR-370-3p/BACH1/HO-1 axis. Thus, circIgfbp2 might be a novel therapeutic target for anxiety and sleep disorders after TBI.
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Affiliation(s)
- Mengran Du
- grid.452206.70000 0004 1758 417XDepartment of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Chenrui Wu
- grid.452206.70000 0004 1758 417XDepartment of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Renqiang Yu
- grid.452206.70000 0004 1758 417XDepartment of Radiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Yuqi Cheng
- grid.452206.70000 0004 1758 417XDepartment of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Zhaohua Tang
- grid.452206.70000 0004 1758 417XDepartment of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Biying Wu
- grid.452206.70000 0004 1758 417XDepartment of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Jiayuanyuan Fu
- grid.452206.70000 0004 1758 417XDepartment of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Weilin Tan
- grid.452206.70000 0004 1758 417XDepartment of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Qiang Zhou
- grid.452206.70000 0004 1758 417XDepartment of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Ziyu Zhu
- grid.452206.70000 0004 1758 417XDepartment of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Ehab Balawi
- grid.452206.70000 0004 1758 417XDepartment of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Xuekang Huang
- grid.452206.70000 0004 1758 417XDepartment of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Jun Ma
- grid.452206.70000 0004 1758 417XDepartment of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Z. B. Liao
- grid.452206.70000 0004 1758 417XDepartment of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
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Selective activation of cannabinoid receptor-2 reduces white matter injury via PERK signaling in a rat model of traumatic brain injury. Exp Neurol 2021; 347:113899. [PMID: 34678230 DOI: 10.1016/j.expneurol.2021.113899] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/30/2021] [Accepted: 10/16/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND PURPOSE Traumatic brain injury (TBI) destroys white matter, and this destruction is aggravated by secondary neuroinflammatory reactions. Although white matter injury (WMI) is strongly correlated with poor neurological function, understanding of white matter integrity maintenance is limited, and no available therapies can effectively protect white matter. One candidate approach that may fulfill this goal is cannabinoid receptor 2 (CB2) agonist treatment. Here, we confirmed that a selective CB2 agonist, JWH133, protected white matter after TBI. METHODS The motor evoked potentials (MEPs), open field test, and Morris water maze test were used to assess neurobehavioral outcomes. Brain tissue loss, WM damage, Endoplasmic reticulum stress (ER stress), microglia responses were evaluated after TBI. The functional integrity of WM was measured by diffusion tensor imaging (DTI) and transmission electron microscopy (TEM). Primary microglia and oligodendrocyte cocultures were used for additional mechanistic studies. RESULTS JWH133 increased myelin basic protein (MBP) and neurofilament heavy chain (NF200) levels and anatomic preservation of myelinated axons revealed by DTI and TEM. JWH133 also increased the numbers of oligodendrocyte precursor cells and mature oligodendrocytes. Furthermore, JWH133 drove microglial polarization toward the protective M2 phenotype and modulated the redistribution of microglia in the striatum. Further investigation of the underlying mechanism revealed that JWH133 downregulated phosphorylation of the protein kinase R (PKR)-like endoplasmic reticulum (ER) kinase (PERK) signaling pathway and its downstream signals eukaryotic translation initiation factor 2 α (eIF2α), activating transcription factor 4 (ATF4) and Growth arrest and DNA damage-inducible protein (GADD34); this downregulation was followed by p-Protein kinase B(p-Akt) upregulation. In primary cocultures of microglia and oligodendrocytes, JWH133 decreased phosphorylated PERK expression in microglia stimulated with tunicamycin and facilitated oligodendrocyte survival. These data reveal that JWH133 ultimately alleviates WMI and improves neurological behavior following TBI. However, these effects were prevented by SR144528, a selective CB2 antagonist. CONCLUSIONS This work illustrates the PERK-mediated interaction between microglia and oligodendrocytes. In addition, the results are consistent with recent findings that microglial polarization switching accelerates WMI, highlighting a previously unexplored role for CB2 agonists. Thus, CB2 agonists are potential therapeutic agents for TBI and other neurological conditions involving white matter destruction.
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38
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Li F, Wang N, Zheng Y, Luo Y, Zhang Y. cGAS- Stimulator of Interferon Genes Signaling in Central Nervous System Disorders. Aging Dis 2021; 12:1658-1674. [PMID: 34631213 PMCID: PMC8460300 DOI: 10.14336/ad.2021.0304] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 03/04/2021] [Indexed: 12/19/2022] Open
Abstract
Cytosolic nucleic acid sensors contribute to the initiation of innate immune responses by playing a critical role in the detection of pathogens and endogenous nucleic acids. The cytosolic DNA sensor cyclic-GMP-AMP synthase (cGAS) and its downstream effector, stimulator of interferon genes (STING), mediate innate immune signaling by promoting the release of type I interferons (IFNs) and other inflammatory cytokines. These biomolecules are suggested to play critical roles in host defense, senescence, and tumor immunity. Recent studies have demonstrated that cGAS-STING signaling is strongly implicated in the pathogenesis of central nervous system (CNS) diseases which are underscored by neuroinflammatory-driven disease progression. Understanding and regulating the interactions between cGAS-STING signaling and the nervous system may thus provide an effective approach to prevent or delay late-onset CNS disorders. Here, we present a review of recent advances in the literature on cGAS-STING signaling and provide a comprehensive overview of the modulatory patterns of the cGAS-STING pathway in CNS disorders.
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Affiliation(s)
- Fengjuan Li
- 1Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Ningqun Wang
- 2Institute of Cerebrovascular Disease Research and Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
| | - Yangmin Zheng
- 2Institute of Cerebrovascular Disease Research and Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
| | - Yumin Luo
- 2Institute of Cerebrovascular Disease Research and Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
| | - Yongbo Zhang
- 1Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
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Huang J, Zhang F, Su M, Li J, Yi W, Hou L, Yang S, Liu J, Zhang H, Ma T, Wu D. MeCP2 prevents age-associated cognitive decline via restoring synaptic plasticity in a senescence-accelerated mouse model. Aging Cell 2021; 20:e13451. [PMID: 34363729 PMCID: PMC8441320 DOI: 10.1111/acel.13451] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 07/02/2021] [Accepted: 07/20/2021] [Indexed: 12/17/2022] Open
Abstract
Age‐related cognitive decline in neurodegenerative diseases, such as Alzheimer's disease (AD), is associated with the deficits of synaptic plasticity. Therefore, exploring promising targets to enhance synaptic plasticity in neurodegenerative disorders is crucial. It has been demonstrated that methyl‐CpG binding protein 2 (MeCP2) plays a vital role in neuronal development and MeCP2 malfunction causes various neurodevelopmental disorders. However, the role of MeCP2 in neurodegenerative diseases has been less reported. In the study, we found that MeCP2 expression in the hippocampus was reduced in the hippocampus of senescence‐accelerated mice P8 (SAMP8) mice. Overexpression of hippocampal MeCP2 could elevate synaptic plasticity and cognitive function in SAMP8 mice, while knockdown of MeCP2 impaired synaptic plasticity and cognitive function in senescence accelerated‐resistant 1 (SAMR1) mice. MeCP2‐mediated regulation of synaptic plasticity may be associated with CREB1 pathway. These results suggest that MeCP2 plays a vital role in age‐related cognitive decline by regulating synaptic plasticity and indicate that MeCP2 may be promising targets for the treatment of age‐related cognitive decline in neurodegenerative diseases.
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Affiliation(s)
- Jin‐Lan Huang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy Pharmacy School of Xuzhou Medical University Xuzhou China
| | - Fan Zhang
- Scientific research center of traditional Chinese medicine Guangxi University of Chinese Medicine Nanning China
| | - Min Su
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy Pharmacy School of Xuzhou Medical University Xuzhou China
| | - Jiaxin Li
- Institute for Stem Cell and Neural Regeneration School of Pharmacy Nanjing Medical University Nanjing China
- Key Laboratory of Cardiovascular & Cerebrovascular Medicine School of Pharmacy Nanjing Medical University Nanjing China
| | - Wen Yi
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy Pharmacy School of Xuzhou Medical University Xuzhou China
| | - Li‐Xiang Hou
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy Pharmacy School of Xuzhou Medical University Xuzhou China
| | - Si‐Man Yang
- Scientific research center of traditional Chinese medicine Guangxi University of Chinese Medicine Nanning China
| | - Jin‐Yuan Liu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy Pharmacy School of Xuzhou Medical University Xuzhou China
| | - Hao‐An Zhang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy Pharmacy School of Xuzhou Medical University Xuzhou China
| | - Tengfei Ma
- Institute for Stem Cell and Neural Regeneration School of Pharmacy Nanjing Medical University Nanjing China
- Key Laboratory of Cardiovascular & Cerebrovascular Medicine School of Pharmacy Nanjing Medical University Nanjing China
| | - Deng‐Pan Wu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy Pharmacy School of Xuzhou Medical University Xuzhou China
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40
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Deng C, Yi R, Fei M, Li T, Han Y, Wang H. Naringenin attenuates endoplasmic reticulum stress, reduces apoptosis, and improves functional recovery in experimental traumatic brain injury. Brain Res 2021; 1769:147591. [PMID: 34324877 DOI: 10.1016/j.brainres.2021.147591] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 07/09/2021] [Accepted: 07/23/2021] [Indexed: 11/15/2022]
Abstract
Traumatic brain injury (TBI) is a significant cause of disability and death worldwide. Accumulating evidence suggests that endoplasmic reticulum (ER) stress would be an important component in the pathogenesis of TBI. Although the neuroprotective effects of naringenin, a natural flavonoid isolated from citrus plants, have been confirmed in several neurological diseases, its mechanism of action in TBI needs further investigation. In ICR mice, we found that TBI induced elevated expression of ER stress marker proteins, including 78-kDa glucose-regulated protein (GRP78) and C/EBP homologous protein (CHOP) in the perilesional cortex, which peaked at 7 days and 3 days after TBI, respectively. The induction of ER stress-related proteins partly coincided with ER architectural changes at 3 days post-TBI, indicating ER stress activation in our TBI model. Our results also revealed that continuous naringenin administration ameliorated neurological dysfunction, cerebral edema, plasmalemma permeability, and neuron cell loss at day 3 after TBI. Further, Naringenin suppressed TBI-induced activation of the ER stress pathway (p-eIF2α, ATF4, and CHOP), oxidative stress and apoptosis on day 3 after TBI. In summary, our data suggest that naringenin could ameliorate TBI-induced secondary brain injury by pleiotropic effects, including ER stress attenuation.
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Affiliation(s)
- Chulei Deng
- Department of Neurosurgery, Jinling Hospital, The First School of Clinical Medicine, Southern Medical University, Nanjing 210002, PR China
| | - Renxin Yi
- Department of Neurosurgery, Jinling Hospital, Southeast University, School of Medicine, Nanjing 210002, PR China
| | - Maoxing Fei
- Department of Neurosurgery, Jinling Hospital, Nanjing Medical University, School of Medicine, Nanjing 210002, PR China
| | - Tao Li
- Department of Neurosurgery, Jinling Hospital, Nanjing Medical University, School of Medicine, Nanjing 210002, PR China
| | - Yanling Han
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210002, PR China
| | - Handong Wang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210002, PR China.
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41
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Saikumar J, Bonini NM. Synergistic effects of brain injury and aging: common mechanisms of proteostatic dysfunction. Trends Neurosci 2021; 44:728-740. [PMID: 34301397 DOI: 10.1016/j.tins.2021.06.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 05/26/2021] [Accepted: 06/08/2021] [Indexed: 01/09/2023]
Abstract
The aftermath of TBI is associated with an acute stress response and the accumulation of insoluble protein aggregates. Even after the symptoms of TBI are resolved, insidious molecular processes continue to develop, which often ultimately result in the development of age-associated neurodegenerative disorders. The precise molecular cascades that drive unhealthy brain aging are still largely unknown. In this review, we discuss proteostatic dysfunction as a converging mechanism contributing to accelerated brain aging after TBI. We examine evidence from human tissue and in vivo animal models, spanning both the aging and injury contexts. We conclude that TBI has a sustained debilitating effect on the proteostatic machinery, which may contribute to the accelerated pathological and cognitive hallmarks of aging that are observed following injury.
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Affiliation(s)
- Janani Saikumar
- Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Nancy M Bonini
- Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA.
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42
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Brady RD, Bird S, Sun M, Yamakawa GR, Major BP, Mychasiuk R, O'Brien TJ, McDonald SJ, Shultz SR. Activation of the Protein Kinase R-Like Endoplasmic Reticulum Kinase (PERK) Pathway of the Unfolded Protein Response after Experimental Traumatic Brain Injury and Treatment with a PERK Inhibitor. Neurotrauma Rep 2021; 2:330-342. [PMID: 34318301 PMCID: PMC8310749 DOI: 10.1089/neur.2021.0001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Neurodegeneration after traumatic brain injury (TBI) is increasingly recognized as a key factor contributing to poor chronic outcomes. Activation (i.e., phosphorylation) of the protein kinase R-like endoplasmic reticulum kinase (PERK) pathway has been implicated in neurodegenerative conditions with pathological similarities to TBI and may be a potential target to improve TBI outcomes. Here, we aimed to determine whether a moderate TBI would induce activation of the PERK pathway and whether treatment with the PERK inhibitor, GSK2606414, would improve TBI recovery. Male mice were administered a lateral fluid percussion injury (FPI) or sham injury and were euthanized at either 2 h, 24 h, or 1 week post-injury (n = 5 per injury group and time point) to assess changes in the PERK pathway. In the injured cortex, there was increased phosphorylated-PERK at 2 h post-FPI and increased phosphorylation of eukaryotic translation initiation factor α at 24 h post-FPI. We next examined the effect of acute treatment with GSK2606414 on pathological and behavioral outcomes at 4 weeks post-injury. Thus, there were a total of four groups: sham + VEH (n = 9); sham + GSK4606414 (n = 10); FPI + VEH (n = 9); and FPI + GSK2606414 (n = 9). GSK2606414 (50 mg/kg) or vehicle treatment was delivered by oral gavage beginning at 30 min post-injury, followed by two further treatments at 12-h increments. There were no significant effects of GSK2606414 on any of the outcomes assessed, which could be attributable to several reasons. For example, activation of PERK may not be a significant contributor to the neurological consequences 4 weeks post-FPI in mice. Further research is required to elucidate the role of the PERK pathway in TBI and whether interventions that target this pathway are beneficial.
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Affiliation(s)
- Rhys D Brady
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia.,Department of Medicine, The University of Melbourne, Parkville, Victoria, Australia
| | - Stefanie Bird
- Department of Medicine, The University of Melbourne, Parkville, Victoria, Australia
| | - Mujun Sun
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia.,Department of Medicine, The University of Melbourne, Parkville, Victoria, Australia
| | - Glenn R Yamakawa
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Brendan P Major
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Richelle Mychasiuk
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Terence J O'Brien
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia.,Department of Medicine, The University of Melbourne, Parkville, Victoria, Australia
| | - Stuart J McDonald
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia.,Department of Physiology, Anatomy, and Microbiology, La Trobe University, Bundoora, Victoria, Australia
| | - Sandy R Shultz
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia.,Department of Medicine, The University of Melbourne, Parkville, Victoria, Australia
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43
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Shikonin Attenuates Chronic Cerebral Hypoperfusion-Induced Cognitive Impairment by Inhibiting Apoptosis via PTEN/Akt/CREB/BDNF Signaling. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:5564246. [PMID: 34211568 PMCID: PMC8205575 DOI: 10.1155/2021/5564246] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 05/13/2021] [Accepted: 05/25/2021] [Indexed: 12/25/2022]
Abstract
Shikonin (SK) exerts neuroprotective effects; however, to date, its protective effect against chronic cerebral hypoperfusion- (CCH-) induced vascular dementia (VaD) has not been investigated. Therefore, the current study investigated whether SK could mitigate the cognitive deficits caused by CCH. The effects of SK treatment on the PTEN/Akt/CREB/BDNF signaling pathway and apoptosis in hippocampal neurons were examined in a rat model of VaD established via bilateral common carotid artery occlusion (BCCAO). Fifty-two rats were randomly divided into 4 groups: sham, vehicle, SK-L (10 mg/kg SK per day), and SK-H (25 mg/kg SK per day). SK was regularly administered by gavage for 2 weeks. The results of the water maze test revealed that the escape latency in the vehicle group was significantly longer than that in the sham group, and rats in the vehicle group spent a smaller proportion of time in the target quadrant than those in the sham group. SK treatment reduced the escape latencies and increased the proportion of time spent in the target quadrant. Nissl staining showed morphological damage in the CA1 areas of the hippocampus in the vehicle group. SK treatment alleviated the injuries to hippocampal neurons. Western blot analysis showed higher p-PTEN and lower p-Akt, p-CREB, and BDNF expression in the vehicle group than in the sham group. SK administration reversed the upregulation of p-PTEN and the downregulation of p-Akt, p-CREB, and BDNF. The number of terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling- (TUNEL-) positive cells in the hippocampal CA1 region of the vehicle group was significantly increased. Treatment with SK decreased the number of positive cells. Furthermore, as marker proteins of apoptosis, bcl-2 expression was decreased and bax expression was increased; thus, the ratio of bcl-2/bax was decreased in the vehicle group. SK treatment upregulated the expression of bcl-2 and downregulated the expression of bax, thereby elevating the bcl-2/bax ratio. Moreover, the aforementioned effects of SK were dose-dependent. The effect of 25 mg/kg per day was more obvious than that of 10 mg/kg per day. In conclusion, SK inhibited hippocampal neuronal apoptosis to protect against CCH-induced injury by regulating the PTEN/Akt/CREB/BDNF signaling pathway, consequently improving cognitive impairment.
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44
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Yang W, Zhou X, Zimmermann HR, Ma T. Brain-specific suppression of AMPKα2 isoform impairs cognition and hippocampal LTP by PERK-mediated eIF2α phosphorylation. Mol Psychiatry 2021; 26:1880-1897. [PMID: 32366952 PMCID: PMC8054310 DOI: 10.1038/s41380-020-0739-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 04/07/2020] [Accepted: 04/16/2020] [Indexed: 12/13/2022]
Abstract
The AMP-activated protein kinase (AMPK) is a molecular sensor to maintain energy homeostasis. The two isoforms of the AMPK catalytic subunit (AMPKα1 and α2) are both expressed in brains, but their roles in cognition are unknown. We generated conditional knockout mice in which brain AMPKα isoforms are selectively suppressed (AMPKα1/α2 cKO), and determined the isoform-specific effects in mice of either sex on cognition and synaptic plasticity. AMPKα2 cKO but not AMPKα1 cKO displayed impaired cognition and hippocampal late long-term potentiation (L-LTP). Further, AMPKα2 cKO mice exhibited decreased dendritic spine density and abnormal spine morphology in hippocampus. Electron microscope imaging demonstrated reduced postsynaptic density formation and fewer dendritic polyribosomes in hippocampi of AMPKα2 cKO mice. Biochemical studies revealed unexpected findings that repression of AMPKα2 resulted in increased phosphorylation of mRNA translational factor eIF2α and its kinase PERK. Importantly, L-LTP failure and cognitive impairments displayed in AMPKα2 cKO mice were alleviated by suppressing PERK activity pharmacologically or genetically. In summary, we demonstrate here that brain-specific suppression of AMPKα2 isoform impairs cognition and hippocampal LTP by PERK-mediated eIF2α phosphorylation, providing molecular mechanisms linking metabolism, protein synthesis, and cognition.
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Affiliation(s)
- Wenzhong Yang
- Department of Internal Medicine-Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | - Xueyan Zhou
- Department of Internal Medicine-Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | - Helena R. Zimmermann
- Department of Internal Medicine-Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | - Tao Ma
- Department of Internal Medicine-Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC, 27157, USA. .,Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC, 27157, USA. .,Department of Neurobiology and Anatomy, Wake Forest School of Medicine, Winston-Salem, NC, 27157, USA.
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45
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The Role of BDNF in Experimental and Clinical Traumatic Brain Injury. Int J Mol Sci 2021; 22:ijms22073582. [PMID: 33808272 PMCID: PMC8037220 DOI: 10.3390/ijms22073582] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 03/23/2021] [Accepted: 03/26/2021] [Indexed: 02/07/2023] Open
Abstract
Traumatic brain injury is one of the leading causes of mortality and morbidity in the world with no current pharmacological treatment. The role of BDNF in neural repair and regeneration is well established and has also been the focus of TBI research. Here, we review experimental animal models assessing BDNF expression following injury as well as clinical studies in humans including the role of BDNF polymorphism in TBI. There is a large heterogeneity in experimental setups and hence the results with different regional and temporal changes in BDNF expression. Several studies have also assessed different interventions to affect the BDNF expression following injury. Clinical studies highlight the importance of BDNF polymorphism in the outcome and indicate a protective role of BDNF polymorphism following injury. Considering the possibility of affecting the BDNF pathway with available substances, we discuss future studies using transgenic mice as well as iPSC in order to understand the underlying mechanism of BDNF polymorphism in TBI and develop a possible pharmacological treatment.
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46
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Schoof M, Boone M, Wang L, Lawrence R, Frost A, Walter P. eIF2B conformation and assembly state regulate the integrated stress response. eLife 2021; 10:65703. [PMID: 33688831 PMCID: PMC7990499 DOI: 10.7554/elife.65703] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 03/09/2021] [Indexed: 12/13/2022] Open
Abstract
The integrated stress response (ISR) is activated by phosphorylation of the translation initiation factor eIF2 in response to various stress conditions. Phosphorylated eIF2 (eIF2-P) inhibits eIF2’s nucleotide exchange factor eIF2B, a twofold symmetric heterodecamer assembled from subcomplexes. Here, we monitor and manipulate eIF2B assembly in vitro and in vivo. In the absence of eIF2B’s α-subunit, the ISR is induced because unassembled eIF2B tetramer subcomplexes accumulate in cells. Upon addition of the small-molecule ISR inhibitor ISRIB, eIF2B tetramers assemble into active octamers. Surprisingly, ISRIB inhibits the ISR even in the context of fully assembled eIF2B decamers, revealing allosteric communication between the physically distant eIF2, eIF2-P, and ISRIB binding sites. Cryo-electron microscopy structures suggest a rocking motion in eIF2B that couples these binding sites. eIF2-P binding converts eIF2B decamers into ‘conjoined tetramers’ with diminished substrate binding and enzymatic activity. Canonical eIF2-P-driven ISR activation thus arises due to this change in eIF2B’s conformational state.
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Affiliation(s)
- Michael Schoof
- Howard Hughes Medical Institute, University of California at San Francisco, San Francisco, United States.,Department of Biochemistry and Biophysics, University of California at San Francisco, San Francisco, United States
| | - Morgane Boone
- Howard Hughes Medical Institute, University of California at San Francisco, San Francisco, United States.,Department of Biochemistry and Biophysics, University of California at San Francisco, San Francisco, United States
| | - Lan Wang
- Howard Hughes Medical Institute, University of California at San Francisco, San Francisco, United States.,Department of Biochemistry and Biophysics, University of California at San Francisco, San Francisco, United States
| | - Rosalie Lawrence
- Howard Hughes Medical Institute, University of California at San Francisco, San Francisco, United States.,Department of Biochemistry and Biophysics, University of California at San Francisco, San Francisco, United States
| | - Adam Frost
- Department of Biochemistry and Biophysics, University of California at San Francisco, San Francisco, United States.,Chan Zuckerberg Biohub, San Francisco, United States
| | - Peter Walter
- Howard Hughes Medical Institute, University of California at San Francisco, San Francisco, United States.,Department of Biochemistry and Biophysics, University of California at San Francisco, San Francisco, United States
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Shacham T, Patel C, Lederkremer GZ. PERK Pathway and Neurodegenerative Disease: To Inhibit or to Activate? Biomolecules 2021; 11:biom11030354. [PMID: 33652720 PMCID: PMC7996871 DOI: 10.3390/biom11030354] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/18/2021] [Accepted: 02/23/2021] [Indexed: 12/12/2022] Open
Abstract
With the extension of life span in recent decades, there is an increasing burden of late-onset neurodegenerative diseases, for which effective treatments are lacking. Neurodegenerative diseases include the widespread Alzheimer’s disease (AD) and Parkinson’s disease (PD), the less frequent Huntington’s disease (HD) and Amyotrophic Lateral Sclerosis (ALS) and also rare early-onset diseases linked to mutations that cause protein aggregation or loss of function in genes that maintain protein homeostasis. The difficulties in applying gene therapy approaches to tackle these diseases is drawing increasing attention to strategies that aim to inhibit cellular toxicity and restore homeostasis by intervening in cellular pathways. These include the unfolded protein response (UPR), activated in response to endoplasmic reticulum (ER) stress, a cellular affliction that is shared by these diseases. Special focus is turned to the PKR-like ER kinase (PERK) pathway of the UPR as a target for intervention. However, the complexity of the pathway and its ability to promote cell survival or death, depending on ER stress resolution, has led to some confusion in conflicting studies. Both inhibition and activation of the PERK pathway have been reported to be beneficial in disease models, although there are also some reports where they are counterproductive. Although with the current knowledge a definitive answer cannot be given on whether it is better to activate or to inhibit the pathway, the most encouraging strategies appear to rely on boosting some steps without compromising downstream recovery.
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Affiliation(s)
- Talya Shacham
- Cell Biology Division, George Wise Faculty of Life Sciences, The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 69978, Israel; (T.S.); (C.P.)
- Sagol School of Neuroscience, Tel Aviv University, Tel Aviv 69978, Israel
| | - Chaitanya Patel
- Cell Biology Division, George Wise Faculty of Life Sciences, The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 69978, Israel; (T.S.); (C.P.)
- Sagol School of Neuroscience, Tel Aviv University, Tel Aviv 69978, Israel
| | - Gerardo Z. Lederkremer
- Cell Biology Division, George Wise Faculty of Life Sciences, The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 69978, Israel; (T.S.); (C.P.)
- Sagol School of Neuroscience, Tel Aviv University, Tel Aviv 69978, Israel
- Correspondence: ; Tel.: +972-3-640-9239
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Tong L, Li MD, Nie PY, Chen Y, Chen YL, Ji LL. miR-132 downregulation alleviates behavioral impairment of rats exposed to single prolonged stress, reduces the level of apoptosis in PFC, and upregulates the expression of MeCP2 and BDNF. Neurobiol Stress 2021; 14:100311. [PMID: 33718536 PMCID: PMC7921013 DOI: 10.1016/j.ynstr.2021.100311] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 02/01/2021] [Accepted: 02/19/2021] [Indexed: 01/12/2023] Open
Abstract
Post-traumatic stress disorder (PTSD) is usually accompanied by anxiety symptoms and decreased expression of brain-derived neurotrophic factor (BDNF), which played an important role in promoting neuronal proliferation and survival. Methyl CpG-binding protein 2 (MeCP2) is a positive mediator of BDNF and is regulated by miR-132-3p. In the present study, we explored the possible molecular mechanism of miR-132, focusing on the involvement of MeCP2 and BDNF in the formation of anxiety-like symptoms of PTSD. Single prolonged stress (SPS) was used to establish a model of PTSD in adult rats and the anxiety-like behavior was tested by the elevated plus-maze (EPM). The level of miR-132 in the prefrontal cortex (PFC) was increased and intraventricular injection of anti-miR-132 could significantly improve the anxiety-like behavior of rats exposed to SPS through MeCP2 and the subsequent upregulation of BDNF levels. Then tropomyosin-related kinase B (TrkB) and downstream signals, including MAP kinase ERK1/2 and phosphoinositol 3-kinase (PI3K)/Akt pathways, were activated by BDNF upregulation, and might participate in regulating dendritic complexity and the expression of postsynaptic density-95 (PSD95) and synapsin I in the PFC of SPS rats. Furthermore, we found that the apoptosis of cells in PFC induced by SPS procedure could be alleviated by miR-132 inhibition. Our results suggest that miR-132 might be involved in the formation of anxiety-like symptoms of adult rat PTSD models by targeting MeCP2, and this effect is related to BDNF/TrkB and its downstream ERK and Akt signaling pathways.
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Affiliation(s)
- Lei Tong
- Department of Anatomy, College of Basic Medical Sciences, China Medical University, Shenyang, China
| | - Ming-Da Li
- Department of 1st Clinical Medicine, China Medical University, Shenyang, China
| | - Peng-Yin Nie
- Department of Anatomy, College of Basic Medical Sciences, China Medical University, Shenyang, China
| | - Yao Chen
- Department of Anatomy, College of Basic Medical Sciences, China Medical University, Shenyang, China
| | - Yu-Lu Chen
- Department of Anatomy, College of Basic Medical Sciences, China Medical University, Shenyang, China
| | - Li-Li Ji
- Department of Anatomy, College of Basic Medical Sciences, China Medical University, Shenyang, China
- Corresponding author.
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An update on the association between traumatic brain injury and Alzheimer's disease: Focus on Tau pathology and synaptic dysfunction. Neurosci Biobehav Rev 2020; 120:372-386. [PMID: 33171143 DOI: 10.1016/j.neubiorev.2020.10.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 10/09/2020] [Accepted: 10/19/2020] [Indexed: 02/06/2023]
Abstract
L.P. Li, J.W. Liang and H.J. Fu. An update on the association between traumatic brain injury and Alzheimer's disease: Focus on Tau pathology and synaptic dysfunction. NEUROSCI BIOBEHAV REVXXX-XXX,2020.-Traumatic brain injury (TBI) and Alzheimer's disease (AD) are devastating conditions that have long-term consequences on individual's cognitive functions. Although TBI has been considered a risk factor for the development of AD, the link between TBI and AD is still in debate. Aggregation of hyperphosphorylated tau and intercorrelated synaptic dysfunction, two key pathological elements in both TBI and AD, play a pivotal role in mediating neurodegeneration and cognitive deficits, providing a mechanistic link between these two diseases. In the first part of this review, we analyze the experimental literatures on tau pathology in various TBI models and review the distribution, biological features and mechanisms of tau pathology following TBI with implications in AD pathogenesis. In the second part, we review evidences of TBI-mediated structural and functional impairments in synapses, with a focus on the overlapped mechanisms underlying synaptic abnormalities in both TBI and AD. Finally, future perspectives are proposed for uncovering the complex relationship between TBI and neurodegeneration, and developing potential therapeutic avenues for alleviating cognitive deficits after TBI.
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Zhao Z, Ren Y, Jiang H, Huang Y. Dexmedetomidine inhibits the PSD95-NMDA receptor interaction to promote functional recovery following traumatic brain injury. Exp Ther Med 2020; 21:4. [PMID: 33235613 PMCID: PMC7678629 DOI: 10.3892/etm.2020.9436] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Accepted: 10/10/2019] [Indexed: 01/02/2023] Open
Abstract
The present study examined the effects of dexmedetomidine (Dex) on cognitive and motor recovery in mice following traumatic brain injury (TBI). TBI induces synaptic damage, which leads to motor dysfunction and cognitive decline. Although Dex is known to induce neuroprotection, its role following TBI remains unknown. In the present study, male C57BL/6 mice (8 weeks old; n=72) were subjected to cortical impact injury to generate a TBI mice model. Mice were divided into four groups: TBI, sham, TBI + vehicle, and TBI + Dex. Mice in the TBI + vehicle and TBI + Dex groups received intraperitoneal injections of saline (n=18) and 100 µg/kg Dex (n=18), respectively, at 1 and 12 h following surgery. At 24 h post-injury, 10 animals from each group were sacrificed, and brain tissue was isolated for Fluoro-Jade B staining and RNA and protein extraction. At 72 h post-TBI, motor function was evaluated. Furthermore, cognitive impairment was assessed between day 14 and 19 using the Morris water maze. The results demonstrated that the mRNA and protein expression of post-synaptic density 95 (PSD95) was reduced post-TBI. In addition, neuronal degeneration was evaluated using FJB staining, where PSD95 formed a complex with the N-methyl-D-aspartic acid (NMDA) receptor subunit (NR2B) and neuronal nitric oxide synthase (nNOS) inducing neuronal death post-TBI. Treatment with Dex efficiently decreased the PSD95-NR2B-nNOS interaction, which reduced the TBI-induced neuronal death. Furthermore, Dex treatment contributed to the enhanced cognitive and motor recovery following TBI. The results from the present study reported a potential mechanistic action of Dex treatment post-TBI, which may be associated with the inhibition of PSD95-NMDA interaction.
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Affiliation(s)
- Zhongbai Zhao
- Department of Anesthesiology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, P.R. China
| | - Yu Ren
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| | - Hong Jiang
- Department of Anesthesiology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, P.R. China
| | - Yan Huang
- Department of Anesthesiology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, P.R. China
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