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Lu MN, Wang D, Ye CJ, Yan GJ, Song JF, Shi XY, Li SS, Liu LN, Zhang HX, Dong XH, Hu T, Wang XY, Xiyang YB. Navβ2 Intracellular Fragments Contribute to Aβ1-42-Induced Cognitive Impairment and Synaptic Deficit Through Transcriptional Suppression of BDNF. Mol Neurobiol 2024:10.1007/s12035-024-04317-y. [PMID: 38965172 DOI: 10.1007/s12035-024-04317-y] [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: 02/17/2024] [Accepted: 06/17/2024] [Indexed: 07/06/2024]
Abstract
A pathological hallmark of Alzheimer's disease (AD) is the region-specific accumulation of the amyloid-beta protein (Aβ), which triggers aberrant neuronal excitability, synaptic impairment, and progressive cognitive decline. Previous works have demonstrated that Aβ pathology induced aberrant elevation in the levels and excessive enzymatic hydrolysis of voltage-gated sodium channel type 2 beta subunit (Navβ2) in the brain of AD models, accompanied by alteration in excitability of hippocampal neurons, synaptic deficits, and subsequently, cognitive dysfunction. However, the mechanism is unclear. In this research, by employing cell models treated with toxic Aβ1-42 and AD mice, the possible effects and potential mechanisms induced by Navβ2. The results reveal that Aβ1-42 induces remarkable increases in Navβ2 intracellular domain (Navβ2-ICD) and decreases in both BDNF exons and protein levels, as well as phosphorylated tropomyosin-related kinase B (pTrkB) expression in cells and mice, coupled with cognitive impairments, synaptic deficits, and aberrant neuronal excitability. Administration with exogenous Navβ2-ICD further enhances these effects induced by Aβ1-42, while interfering the generation of Navβ2-ICD and/or complementing BDNF neutralize the Navβ2-ICD-conducted effects. Luciferase reporter assay verifies that Navβ2-ICD regulates BDNF transcription and expression by targeting its promoter. Collectively, our findings partially elucidate that abnormal enzymatic hydrolysis of Navβ2 induced by Aβ1-42-associated AD pathology leads to intracellular Navβ2-ICD overload, which may responsible to abnormal neuronal excitability, synaptic deficit, and cognition dysfunction, through its transcriptional suppression on BDNF. Therefore, this work supplies novel evidences that Navβ2 plays crucial roles in the occurrence and progression of cognitive impairment of AD by transcriptional regulatory activity of its cleaved ICD.
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Affiliation(s)
- Min-Nan Lu
- Institute of Neuroscience, Kunming Medical University, Kunming, 650500, Yunnan, China
- Science and Technology Achievement Incubation Center, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Dan Wang
- Institute of Neuroscience, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Chen-Jun Ye
- Institute of Neuroscience, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Guo-Ji Yan
- Institute of Neuroscience, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Jing-Feng Song
- School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Xin-Ying Shi
- Institute of Neuroscience, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Shan-Shan Li
- Experimental Teaching Center, Basic Medical College, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Li-Na Liu
- Institute of Neuroscience, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Hui-Xiang Zhang
- Institute of Neuroscience, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Xiao-Han Dong
- Institute of Neuroscience, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Tao Hu
- Department of Laboratory Medicine, The Third People's Hospital of Yunnan Province, Kunming, 650000, Yunnan, China
| | - Xu-Yang Wang
- Department of Neurosurgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Yan-Bin Xiyang
- Institute of Neuroscience, Kunming Medical University, Kunming, 650500, Yunnan, China.
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Wang D, Zhang HX, Yan GJ, Zhao HR, Dong XH, Tan YX, Li S, Lu MN, Mei R, Liu LN, Wang XY, Xiyang YB. Voluntary running wheel exercise induces cognitive improvement post traumatic brain injury in mouse model through redressing aberrant excitation regulated by voltage-gated sodium channels 1.1, 1.3, and 1.6. Exp Brain Res 2024; 242:205-224. [PMID: 37994916 PMCID: PMC10786980 DOI: 10.1007/s00221-023-06734-2] [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: 04/17/2023] [Accepted: 10/29/2023] [Indexed: 11/24/2023]
Abstract
Traumatic brain injury (TBI) leads to disturbed brain discharge rhythm, elevated excitability, anxiety-like behaviors, and decreased learning and memory capabilities. Cognitive dysfunctions severely affect the quality of life and prognosis of TBI patients, requiring effective rehabilitation treatment. Evidence indicates that moderate exercise after brain injury decreases TBI-induced cognitive decline. However, the underlying mechanism remains unelucidated. Our results demonstrate that TBI causes cognitive impairment behavior abnormalities and overexpression of Nav1.1, Nav1.3 and Nav1.6 proteins inside the hippocampus of mice models. Three weeks of voluntary running wheel (RW) exercise treatments before or/and post-injury effectively redressed the aberrant changes caused by TBI. Additionally, a 10% exercise-conditioned medium helped recover cell viability, neuronal sodium current and expressions of Nav1.1, Nav1.3 and Nav1.6 proteins across cultured neurons after injury. Therefore, the results validate the neuroprotection induced by voluntary RW exercise treatment before or/and post-TBI. The RW exercise-induced improvement in cognitive behaviors and neuronal excitability could be associated with correcting the Nav1.1, Nav1.3, and Nav1.6 expression levels. The current study proves that voluntary exercise is an effective treatment strategy against TBI. The study also highlights novel potential targets for rehabilitating TBI, including the Navs proteins.
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Affiliation(s)
- Dan Wang
- Institute of Neuroscience, Faculty of Basic Medical Science, Kunming Medical University, 1168 West Chunrong Road, Yuhua Avenue, Chenggong, Kunming, Yunnan, 650500, People's Republic of China
| | - Hui-Xiang Zhang
- Institute of Neuroscience, Faculty of Basic Medical Science, Kunming Medical University, 1168 West Chunrong Road, Yuhua Avenue, Chenggong, Kunming, Yunnan, 650500, People's Republic of China
| | - Guo-Ji Yan
- Institute of Neuroscience, Faculty of Basic Medical Science, Kunming Medical University, 1168 West Chunrong Road, Yuhua Avenue, Chenggong, Kunming, Yunnan, 650500, People's Republic of China
| | - Hao-Ran Zhao
- Institute of Neuroscience, Faculty of Basic Medical Science, Kunming Medical University, 1168 West Chunrong Road, Yuhua Avenue, Chenggong, Kunming, Yunnan, 650500, People's Republic of China
| | - Xiao-Han Dong
- Institute of Neuroscience, Faculty of Basic Medical Science, Kunming Medical University, 1168 West Chunrong Road, Yuhua Avenue, Chenggong, Kunming, Yunnan, 650500, People's Republic of China
| | - Ya-Xin Tan
- Institute of Neuroscience, Faculty of Basic Medical Science, Kunming Medical University, 1168 West Chunrong Road, Yuhua Avenue, Chenggong, Kunming, Yunnan, 650500, People's Republic of China
- Department of Pediatrics, The People's Liberation Army (PLA) Rocket Force Characteristic Medical Center, Beijing, 100088, China
| | - Shan Li
- Institute of Neuroscience, Faculty of Basic Medical Science, Kunming Medical University, 1168 West Chunrong Road, Yuhua Avenue, Chenggong, Kunming, Yunnan, 650500, People's Republic of China
- Department of Anatomy, Changsha Medical University, Changsha, China
| | - Min-Nan Lu
- Science and Technology Achievement Incubation Center, Kunming Medical University, Kunming, Yunnan, 650500, China
| | - Rong Mei
- Department of Neurology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Li-Na Liu
- Institute of Neuroscience, Faculty of Basic Medical Science, Kunming Medical University, 1168 West Chunrong Road, Yuhua Avenue, Chenggong, Kunming, Yunnan, 650500, People's Republic of China
| | - Xu-Yang Wang
- Department of Neurosurgery, Shanghai Sixth People' Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, People's Republic of China.
| | - Yan-Bin Xiyang
- Institute of Neuroscience, Faculty of Basic Medical Science, Kunming Medical University, 1168 West Chunrong Road, Yuhua Avenue, Chenggong, Kunming, Yunnan, 650500, People's Republic of China.
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Yu Z, Li M, Peng W. Exploring biomarkers of premature ovarian insufficiency based on oxford nanopore transcriptional profile and machine learning. Sci Rep 2023; 13:11498. [PMID: 37460774 PMCID: PMC10352282 DOI: 10.1038/s41598-023-38754-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 07/14/2023] [Indexed: 07/20/2023] Open
Abstract
Premature ovarian insufficiency (POI) is a reproductive endocrine disorder characterized by infertility and perimenopausal syndrome, with a highly heterogeneous genetic etiology and its mechanism is not fully understood. Therefore, we utilized Oxford Nanopore Technology (ONT) for the first time to characterize the full-length transcript profile, and revealed biomarkers, pathway and molecular mechanisms for POI by bioinformatics analysis and machine learning. Ultimately, we identified 272 differentially expressed genes, 858 core genes, and 25 hub genes by analysis of differential expression, gene set enrichment, and protein-protein interactions. Seven candidate genes were identified based on the intersection features of the random forest and Boruta algorithm. qRT-PCR results indicated that COX5A, UQCRFS1, LCK, RPS2 and EIF5A exhibited consistent expression trends with sequencing data and have potential as biomarkers. Additionally, GSEA analysis revealed that the pathophysiology of POI is closely associated with inhibition of the PI3K-AKT pathway, oxidative phosphorylation and DNA damage repair, as well as activation of inflammatory and apoptotic pathways. Furthermore, we emphasize that downregulation of respiratory chain enzyme complex subunits and inhibition of oxidative phosphorylation pathways play crucial roles in the pathophysiology of POI. In conclusion, our utilization of long-read sequencing has refined the annotation information within the POI transcriptional profile. This valuable data provides novel insights for further exploration into molecular regulatory networks and potential biomarkers associated with POI.
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Affiliation(s)
- Zhaoyang Yu
- The First Affiliated Clinical College of Guangxi Medical University, Nanning, China
| | - Mujun Li
- Reproductive Medicine Research Center, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.
| | - Weilong Peng
- School of Computer Science and Cyber Engineering, Guangzhou University, Guangzhou, China.
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Yurttas AG, Okat Z, Elgun T, Cifci KU, Sevim AM, Gul A. Genetic deviation associated with photodynamic therapy in HeLa cell. Photodiagnosis Photodyn Ther 2023; 42:103346. [PMID: 36809810 DOI: 10.1016/j.pdpdt.2023.103346] [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: 11/18/2022] [Revised: 02/05/2023] [Accepted: 02/14/2023] [Indexed: 02/22/2023]
Abstract
Photodynamic therapy (PDT) is a method that is used in cancer treatment. The main therapeutic effect is the production of singlet oxygen (1O2). Phthalocyanines for PDT produce high singlet oxygen with absorbers of about 600-700 nm. AIM It is aimed to analyze cancer cell pathways by flow cytometry analysis and cancer-related genes with q-PCR device by applying phthalocyanine L1ZnPC, which we use as photosensitizer in photodynamic therapy, in HELA cell line. In this study, we investigate the molecular basis of L1ZnPC's anti-cancer activity. MATERIAL METHOD The cytotoxic effects of L1ZnPC, a phthalocyanine obtained from our previous study, in HELA cells were evaluated and it was determined that it led to a high rate of death as a result. The result of photodynamic therapy was analyzed using q-PCR. From the data received at the conclusion of this investigation, gene expression values were calculated, and expression levels were assessed using the 2-∆∆Ct method to examine the relative changes in these values. Cell death pathways were interpreted with the FLOW cytometer device. One-Way Analysis of Variance (ANOVA) and the Tukey-Kramer Multiple Comparison Test with Post-hoc Test were used for the statistical analysis. CONCLUSION In our study, it was observed that HELA cancer cells underwent apoptosis at a rate of 80% with drug application plus photodynamic therapy by flow cytometry method. According to q-PCR results, CT values of eight out of eighty-four genes were found to be significant and their association with cancer was evaluated. L1ZnPC is a new phthalocyanine used in this study and our findings should be supported by further studies. For this reason, different analyses are needed to be performed with this drug in different cancer cell lines. In conclusion, according to our results, this drug looks promising but still needs to be analyzed through new studies. It is necessary to examine in detail which signaling pathways they use and their mechanism of action. For this, additional experiments are required.
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Affiliation(s)
- Asiye Gok Yurttas
- Department of Biochemistry, Faculty of Pharmacy, Istanbul Health and Technology University, Istanbul, Turkey.
| | - Zehra Okat
- Department of Biochemistry, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Tugba Elgun
- Medical Biology, Faculty of Medicine, Istanbul Biruni University, Istanbul, Turkey
| | - Kezban Ucar Cifci
- Division of Basic Sciences and Health, Hemp Research Institute, Yozgat Bozok University, Yozgat, Turkey; Department of Molecular Medicine, Institute of Health Sciences, University of Health Sciences, Turkey
| | - Altug Mert Sevim
- Department of Chemistry, Istanbul Technical University, Istanbul, Turkey
| | - Ahmet Gul
- Department of Chemistry, Istanbul Technical University, Istanbul, Turkey
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Reduced Expression of Voltage-Gated Sodium Channel Beta 2 Restores Neuronal Injury and Improves Cognitive Dysfunction Induced by A β1-42. Neural Plast 2022; 2022:3995227. [PMID: 36406589 PMCID: PMC9671742 DOI: 10.1155/2022/3995227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 10/05/2022] [Accepted: 10/18/2022] [Indexed: 11/12/2022] Open
Abstract
Voltage-gated sodium channel beta 2 (Nav2.2 or Navβ2, coded by SCN2B mRNA), a gene involved in maintaining normal physiological functions of the prefrontal cortex and hippocampus, might be associated with prefrontal cortex aging and memory decline. This study investigated the effects of Navβ2 in amyloid-β 1-42- (Aβ1-42-) induced neural injury model and the potential underlying molecular mechanism. The results showed that Navβ2 knockdown restored neuronal viability of Aβ1-42-induced injury in neurons; increased the contents of brain-derived neurotrophic factor (BDNF), enzyme neprilysin (NEP) protein, and NEP enzyme activity; and effectively altered the proportions of the amyloid precursor protein (APP) metabolites including Aβ42, sAPPα, and sAPPβ, thus ameliorating cognitive dysfunction. This may be achieved through regulating NEP transcription and APP metabolism, accelerating Aβ degradation, alleviating neuronal impairment, and regulating BDNF-related signal pathways to repair neuronal synaptic efficiency. This study provides novel evidence indicating that Navβ2 plays crucial roles in the repair of neuronal injury induced by Aβ1-42 both in vivo and in vitro.
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Zhao N, Jiang R, Cheng J, Xiao Q. Effects of gastrodin on the expression of brain aging-related genes in SAM/P-8 mice based on network pharmacology. IBRAIN 2022; 9:157-170. [PMID: 37786545 PMCID: PMC10529193 DOI: 10.1002/ibra.12076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/18/2022] [Accepted: 10/20/2022] [Indexed: 10/04/2023]
Abstract
Background Gastrodin can reduce neuronal damage through multiple targets and pathways, and can be useful in preventing and treating degenerative lesions of the central nervous system, but the specific mechanism has not been elucidated. Methods The aging-related genes in the hippocampus and the frontal cortex were detected in adult and aged mice treated with gastrodin or not. In addition, we collected the target genes of gastrodin and aging from a network database, and a Venn diagram was created to obtain the intersection target genes of gastrodin and aging. Then, the String database was used to analyze the protein-protein interactions (PPIs) between aging-related genes and the target genes of gastrodin and aging. The "drug-disease-target-pathway" network was constructed using Cytoscape 3.7.2 software, and the main mechanism and pathway of key genes were analyzed by Kyoto Encyclopedia of Genes and Genomes (KEGG) and Gene Ontology (GO). Finally, the reliability of these key genes was further verified by molecular docking technology. Results The results showed that 6 out of 10 genes related to brain aging were differentially expressed after gastrodin intervention. Moreover, there were 11 key genes between gastrodin and differentially expressed genes related to brain aging. GO and KEGG results suggested that material metabolism and carbohydrate digestion and absorption were associated with the pathological mechanism of gastrodin antiaging. Molecular docking results also confirmed the good binding activity of gastrodin to the key genes. Conclusion Gastrodin plays a potential role in antiaging by regulating substance metabolism and carbohydrate digestion and absorption.
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Affiliation(s)
- Nan Zhao
- Department of Anesthesia, Hospital of StomatologyZunyi Medical UniversityZunyiChina
| | - Rui Jiang
- Department of AnesthesiaAffiliated Hospital of Zunyi Medical UniversityZunyiChina
| | - Jun‐Jie Cheng
- Department of AnesthesiaAffiliated Hospital of Zunyi Medical UniversityZunyiChina
| | - Qiu‐Xia Xiao
- Department of AnesthesiologyNanchong Central HospitalSichuanChina
- Department of AnesthesiologyUniversity of VirginiaCharlottesvilleVirginiaUSA
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Molecular Signatures of Mitochondrial Complexes Involved in Alzheimer’s Disease via Oxidative Phosphorylation and Retrograde Endocannabinoid Signaling Pathways. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:9565545. [PMID: 35432724 PMCID: PMC9006080 DOI: 10.1155/2022/9565545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 03/22/2022] [Indexed: 11/17/2022]
Abstract
Objective The inability to intervene in Alzheimer's disease (AD) forces the search for promising gene-targeted therapies. This study was aimed at exploring molecular signatures and mechanistic pathways to improve the diagnosis and treatment of AD. Methods Microarray datasets were collected to filter differentially expressed genes (DEGs) between AD and nondementia controls. Weight gene correlation network analysis (WGCNA) was employed to analyze the correlation of coexpression modules with AD phenotype. A global regulatory network was established and then visualized using Cytoscape software to determine hub genes and their mechanistic pathways. Receiver operating characteristic (ROC) analysis was conducted to estimate the diagnostic performance of hub genes in AD prediction. Results A total of 2,163 DEGs from 13,049 background genes were screened in AD relative to nondementia controls. Among the six coexpression modules constructed by WGCNA, DEGs of the key modules with the strongest correlation with AD were extracted to build a global regulatory network. According to the Maximal Clique Centrality (MCC) method, five hub genes associated with mitochondrial complexes were chosen. Further pathway enrichment analysis of hub genes, such as oxidative phosphorylation and retrograde endocannabinoid signaling, was identified. According to the area under the curve (AUC) of about 70%, each hub gene exhibited a good diagnostic performance in predicting AD. Conclusions Our findings highlight the perturbation of mitochondrial complexes underlying AD onset, which is mediated by molecular signatures involved in oxidative phosphorylation (COX5A, NDUFAB1, SDHB, UQCRC2, and UQCRFS1) and retrograde endocannabinoid signaling (NDUFAB1) pathways.
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Szczurek-Janicka P, Ropka-Molik K, Oczkowicz M, Orczewska-Dudek S, Pietras M, Pieszka M. Expression Profile of Brain Aging and Metabolic Function are Altered by Resveratrol or α-Ketoglutarate Supplementation in Rats Fed a High-Fat Diet. POL J FOOD NUTR SCI 2021. [DOI: 10.31883/pjfns/139081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Hu T, Li S, Liang WQ, Li SS, Lu MN, Chen B, Zhang L, Mao R, Ding WH, Gao WW, Chen SW, XiYang YB, Zhang J, Wang XY. Notoginsenoside R1-Induced Neuronal Repair in Models of Alzheimer Disease Is Associated With an Alteration in Neuronal Hyperexcitability, Which Is Regulated by Nav. Front Cell Neurosci 2020; 14:280. [PMID: 33088260 PMCID: PMC7500285 DOI: 10.3389/fncel.2020.00280] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 08/06/2020] [Indexed: 12/28/2022] Open
Abstract
Alzheimer disease is characterized by a progressive cognitive deficit and may be associated with an aberrant hyperexcitability of the neuronal network. Notoginsenoside R1 (R1), a major activity ingredient from Panax notoginseng, has demonstrated favorable changes in neuronal plasticity and induced neuroprotective effects in brain injuries, resulting from various disorders, however, the underlying mechanisms are still not well understood. In the present study, we aimed to explore the possible neuroprotective effects induced by R1 in a mouse model of AD and the mechanisms underlying these effects. Treatment with R1 significantly improved learning and memory functions and redressed neuronal hyperexcitability in amyloid precursor protein/presenilin-1 mice by altering the numbers and/or distribution of the members of voltage-gated sodium channels (Nav). Moreover, we determined whether R1 contributed to the regulation of neuronal excitability in Aβ-42–injured cells. Results of our study demonstrated that treatment with R1 rescued Aβ1-42–induced injured neurons by increasing cell viability. R1-induced alleviation in neuronal hyperexcitability might be associated with reduced Navβ2 cleavage, which partially reversed the abnormal distribution of Nav1.1α. These results suggested that R1 played a vital role in the recovery of Aβ1-42–induced neuronal injury and hyperexcitability, which is regulated by Nav proteins. Therefore, R1 may be a promising candidate in the treatment of AD.
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Affiliation(s)
- Tao Hu
- Department of Laboratory Medicine, The Third People's Hospital of Yunnan Province, Kunming, China
| | - Shan Li
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, China
| | - Wen-Qi Liang
- Department of Emergency, Shanghai Changhai Hospital, Naval Medical University, Shanghai, China
| | - Shan-Shan Li
- Basic Medical College, Experimental Teaching Center, Kunming Medical University, Kunming, China
| | - Min-Nan Lu
- Science and Technology Achievement Incubation Center, Kunming Medical University, Kunming, China
| | - Bo Chen
- Science and Technology Achievement Incubation Center, Kunming Medical University, Kunming, China
| | - Li Zhang
- Editorial Department of Journal of Kunming Medical University, Kunming, China
| | - Rui Mao
- School of Stomatology, Kunming Medicine University, Kunming, China
| | - Wan-Hai Ding
- Department of Neurosurgery, Shanghai Jiao Tong University Affiliated 6th People's Hospital, Shanghai, China
| | - Wen-Wei Gao
- Department of Neurosurgery, Shanghai Jiao Tong University Affiliated 6th People's Hospital, Shanghai, China
| | - Shi-Wen Chen
- Department of Neurosurgery, Shanghai Jiao Tong University Affiliated 6th People's Hospital, Shanghai, China
| | - Yan-Bin XiYang
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, China
| | - Jie Zhang
- Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, Department of Medical Genetics, The First People's Hospital of Yunnan Province, Kunming, China.,Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
| | - Xu-Yang Wang
- Department of Neurosurgery, Shanghai Jiao Tong University Affiliated 6th People's Hospital, Shanghai, China
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Xiyang YB, Liu R, Wang XY, Li S, Zhao Y, Lu BT, Xiao ZC, Zhang LF, Wang TH, Zhang J. COX5A Plays a Vital Role in Memory Impairment Associated With Brain Aging via the BDNF/ERK1/2 Signaling Pathway. Front Aging Neurosci 2020; 12:215. [PMID: 32754029 PMCID: PMC7365906 DOI: 10.3389/fnagi.2020.00215] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 06/18/2020] [Indexed: 12/22/2022] Open
Abstract
Cytochrome c oxidase subunit Va (COX5A) is involved in maintaining normal mitochondrial function. However, little is known on the role of COX5A in the development and progress of Alzheimer’s disease (Martinez-Losa et al., 2018). In this study, we established and characterized the genomic profiles of genes expressed in the hippocampus of Senescence-Accelerated Mouse-prone 8 (SAMP8) mice, and revealed differential expression of COX5A among 12-month-aged SAMP8 mice and 2-month-aged SAMP8 mice. Newly established transgenic mice with systemic COX5A overexpression (51% increase) resulted in the improvement of spatial recognition memory and hippocampal synaptic plasticity, recovery of hippocampal CA1 dendrites, and activation of the BDNF/ERK1/2 signaling pathway in vivo. Moreover, mice with both COX5A overexpression and BDNF knockdown showed a poor recovery in spatial recognition memory as well as a decrease in spine density and branching of dendrites in CA1, when compared to mice that only overexpressed COX5A. In vitro studies supported that COX5A affected neuronal growth via BDNF. In summary, this study was the first to show that COX5A in the hippocampus plays a vital role in aging-related cognitive deterioration via BDNF/ERK1/2 regulation, and suggested that COX5A may be a potential target for anti-senescence drugs.
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Affiliation(s)
- Yan-Bin Xiyang
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, China
| | - Ruan Liu
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, China
| | - Xu-Yang Wang
- Department of Neurosurgery, Shanghai Jiao Tong University Affiliated 6th People's Hospital, Shanghai, China
| | - Shan Li
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, China
| | - Ya Zhao
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, China
| | - Bing-Tuan Lu
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, China
| | - Zhi-Cheng Xiao
- Monash Immunology and Stem Cell Laboratories (MISCL), Monash University, Clayton, VIC, Australia
| | - Lian-Feng Zhang
- Key Laboratory of Human Diseases Comparative Medicine, Ministry of Health, Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences (CAMS) and Comparative Medicine Centre, Peking Union Medical College (PUMC), Beijing, China
| | - Ting-Hua Wang
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, China
| | - Jie Zhang
- Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, Department of Medical Genetics, The First People's Hospital of Yunnan Province, Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
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Jiang Y, Bai X, Li TT, Al-Hawwas M, Jin Y, Zou Y, Hu Y, Liu LY, Zhang Y, Liu Q, Yang H, Ma J, Wang TH, Liu J, Xiong LL. COX5A over-expression protects cortical neurons from hypoxic ischemic injury in neonatal rats associated with TPI up-regulation. BMC Neurosci 2020; 21:18. [PMID: 32349668 PMCID: PMC7191708 DOI: 10.1186/s12868-020-00565-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 04/17/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Neonatal hypoxic-ischemic encephalopathy (HIE) represents as a major cause of neonatal morbidity and mortality. However, the underlying molecular mechanisms in brain damage are still not fully elucidated. This study was conducted to determine the specific potential molecular mechanism in the hypoxic-ischemic induced cerebral injury. METHODS Here, hypoxic-ischemic (HI) animal models were established and primary cortical neurons were subjected to oxygen-glucose deprivation (OGD) to mimic HIE model in vivo and in vitro. The HI-induced neurological injury was evaluated by Zea-longa scores, Triphenyte-trazoliumchloride (TTC) staining the Terminal Deoxynucleotidyl Transferased Utp Nick End Labeling (TUNEL) and immunofluorescent staining. Then the expression of Cytochrome c oxidase subunit 5a (COX5A) was determined by immunohistochemistry, western blotting (WB) and quantitative real time Polymerase Chain Reaction (qRT-PCR) techniques. Moreover, HSV-mediated COX5A over-expression virus was transducted into OGD neurons to explore the role of COX5A in vitro, and the underlying mechanism was predicted by GeneMANIA, then verified by WB and qRT-PCR. RESULTS HI induced a severe neurological dysfunction, brain infarction, and cell apoptosis as well as obvious neuron loss in neonatal rats, in corresponding to the decrease on the expression of COX5A in both sides of the brain. What's more, COX5A over-expression significantly promoted the neuronal survival, reduced the apoptosis rate, and markedly increased the neurites length after OGD. Moreover, Triosephosephate isomerase (TPI) was predicted as physical interactions with COX5A, and COX5A over-expression largely increased the expressional level of TPI. CONCLUSIONS The present findings suggest that COX5A plays an important role in promoting neurological recovery after HI, and this process is related to TPI up-regulation.
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Affiliation(s)
- Ya Jiang
- Laboratory Zoology Department, Institute of Neuroscience, Kunming Medical University, Kunming, China
| | - Xue Bai
- National Traditional Chinese Medicine Clinical Research Base and Western Medicine Translational Medicine Research Center, Department of Cardiac and Cerebral Diseases, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, 646000, China
| | - Ting-Ting Li
- National Traditional Chinese Medicine Clinical Research Base and Western Medicine Translational Medicine Research Center, Department of Cardiac and Cerebral Diseases, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, 646000, China
| | - Mohammed Al-Hawwas
- School of Pharmacy and Medical Sciences, Division of Health Sciences, University of South Australia, Adelaide, 5000, South Australia
| | - Yuan Jin
- Laboratory Zoology Department, Institute of Neuroscience, Kunming Medical University, Kunming, China
| | - Yu Zou
- Laboratory Zoology Department, Institute of Neuroscience, Kunming Medical University, Kunming, China
| | - Yue Hu
- Laboratory Zoology Department, Institute of Neuroscience, Kunming Medical University, Kunming, China
| | - Lin-Yi Liu
- Department of Neurosurgery, The First People's Hospital of Zhaotong, Zhaotong, 657000, China
| | - Ying Zhang
- National Traditional Chinese Medicine Clinical Research Base and Western Medicine Translational Medicine Research Center, Department of Cardiac and Cerebral Diseases, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, 646000, China
| | - Qing Liu
- National Traditional Chinese Medicine Clinical Research Base and Western Medicine Translational Medicine Research Center, Department of Cardiac and Cerebral Diseases, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, 646000, China
| | - Hao Yang
- Laboratory Zoology Department, Institute of Neuroscience, Kunming Medical University, Kunming, China
| | - Jun Ma
- Department of Neurosurgery, The First People's Hospital of Zhaotong, Zhaotong, 657000, China
| | - Ting-Hua Wang
- Laboratory Zoology Department, Institute of Neuroscience, Kunming Medical University, Kunming, China.
| | - Jia Liu
- Laboratory Zoology Department, Institute of Neuroscience, Kunming Medical University, Kunming, China.
| | - Liu-Lin Xiong
- Laboratory Zoology Department, Institute of Neuroscience, Kunming Medical University, Kunming, China.
- School of Pharmacy and Medical Sciences, Division of Health Sciences, University of South Australia, Adelaide, 5000, South Australia.
- National Traditional Chinese Medicine Clinical Research Base and Western Medicine Translational Medicine Research Center, Department of Cardiac and Cerebral Diseases, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, 646000, China.
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12
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Exercise-Induced Cognitive Improvement Is Associated with Sodium Channel-Mediated Excitability in APP/PS1 Mice. Neural Plast 2020; 2020:9132720. [PMID: 32256560 PMCID: PMC7103997 DOI: 10.1155/2020/9132720] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/16/2020] [Accepted: 02/19/2020] [Indexed: 12/19/2022] Open
Abstract
Elevated brain activation, or hyperexcitability, induces cognitive impairment and confers an increased risk of Alzheimer's disease (AD). Blocking the overexcitation of the neural network may be a promising new strategy to prevent, halt, and even reverse this condition. Physical exercise has been shown to be an effective cognitive enhancer that reduces the risk of AD in elderly individuals, but the underlying mechanisms are far from being fully understood. We explored whether long-term treadmill exercise attenuates amyloid precursor protein (APP)/presenilin-1 (PS1) mutation-induced aberrant network activity and thus improves cognition by altering the numbers and/or distribution of voltage-gated sodium channels (Nav) in transgenic mice. APP/PS1 mice aged 2, 3.5, 5, 6.5, 8, and 9 months underwent treadmill exercise with different durations or at different stages of AD. The alterations in memory, electroencephalogram (EEG) recordings, and expression levels and distributions of Nav functional members (Nav1.1α, Nav1.2, Nav1.6, and Navβ2) were evaluated. The results revealed that treadmill exercise with 12- and 24-week durations 1) induced significant improvement in novel object recognition (NOR) memory and Morris water maze (MWM) spatial memory; 2) partially reduced abnormal spike activity; and 3) redressed the disturbed cellular distribution of Nav1.1α, aberrant Navβ2 cleavage augmentation, and Nav1.6 upregulation. Additionally, APP/PS1 mice in the 24-week exercise group showed better performance in the NOR task and a large decrease in Nav1.6 expression, which was close to the wild-type level. This study suggests that exercise improves cognition and neural activity by altering the numbers and distribution of hippocampal Nav in APP/PS1 mice. Long-term treadmill exercise, for about 24 weeks, starting in the preclinical stage, is a promising therapeutic strategy for preventing AD and halting its progress.
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13
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Tan YX, Hong Y, Jiang S, Lu MN, Li S, Chen B, Zhang L, Hu T, Mao R, Mei R, Xiyang YB. MicroRNA‑449a regulates the progression of brain aging by targeting SCN2B in SAMP8 mice. Int J Mol Med 2020; 45:1091-1102. [PMID: 32124967 PMCID: PMC7053848 DOI: 10.3892/ijmm.2020.4502] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 01/29/2020] [Indexed: 12/23/2022] Open
Abstract
Our previous study demonstrated that the expression of sodium channel voltage-gated beta 2 (SCN2B) increased with aging in senescence-accelerated mouse prone 8 (SAMP8) mice, and was identified to be associated with a decline in learning and memory, while the underlying mechanism is unclear. In the present study, multiple differentially expressed miRNAs, which may be involved in the process of aging by regulating target genes, were identified in the prefrontal cortex and hippocampus of SAMP8 mice though miRNA microarray analysis. Using bioinformatics prediction, SCN2B was identified to be one of the potential target genes of miR-449a, which was downregulated in the hippocampus. Previous studies demonstrated that miR-449a is involved in the occurrence and progression of aging by regulating a variety of target genes. Therefore, it was hypothesized that miR-449a may be involved in the process of brain aging by targeting SCN2B. To verify this hypothesis, the following experiments were conducted: A reverse transcription-quantitative polymerase chain reaction assay revealed that the expression level of miR-449a was significantly decreased in the prefrontal cortex and hippocampus of 12-month old SAMP8 mice; a dual-luciferase reporter assay verified that miR-449a regulated SCN2B expression by binding to the 3′-UTR 'seed region'; an anti-Ago co-immunoprecipitation combined with Affymetrix micro-array analyses demonstrated that the target mRNA highly enriched with Ago-miRNPs was confirmed to be SCN2B. Finally, overexpression of miR-449a or inhibition of SCN2B promoted the extension of hippocampal neurons in vitro. The results of the present study suggested that miR-449a was downregulated in the prefrontal cortex and hippocampus of SAMP8 mice and may regulate the process of brain aging by targeting SCN2B.
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Affiliation(s)
- Ya-Xin Tan
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Ying Hong
- Department of Laboratory Medicine, The Third People's Hospital of Yunnan Province, Kunming, Yunnan 650011, P.R. China
| | - Shui Jiang
- Department of Laboratory Medicine, The Third People's Hospital of Yunnan Province, Kunming, Yunnan 650011, P.R. China
| | - Min-Nan Lu
- Science and Technology Achievement Incubation Center, Kunming, Yunnan 650500, P.R. China
| | - Shan Li
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Bo Chen
- Science and Technology Achievement Incubation Center, Kunming, Yunnan 650500, P.R. China
| | - Li Zhang
- Editorial Department of Journal of Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Tao Hu
- Department of Laboratory Medicine, The Third People's Hospital of Yunnan Province, Kunming, Yunnan 650011, P.R. China
| | - Rui Mao
- School of Stomatology, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Rong Mei
- Department of Neurology, The First People's Hospital of Yunnan Province, Kunming, Yunnan 650032, P.R. China
| | - Yan-Bin Xiyang
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
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14
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Yu H, Zhang P, Chen YR, Wang YJ, Lin XY, Li XY, Chen G. Temporal Changes of Spinal Transcriptomic Profiles in Mice With Spinal Nerve Ligation. Front Neurosci 2019; 13:1357. [PMID: 31920516 PMCID: PMC6928122 DOI: 10.3389/fnins.2019.01357] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 12/02/2019] [Indexed: 12/20/2022] Open
Abstract
Neuropathic pain (NP) is an intractable disease accompanying with allodynia, hyperalgesia and spontaneous pain. Accumulating evidence suggested that large volume of neurotransmitters, genes, and signaling pathways were implicated with the initiation and development of NP, while the underlying mechanism still remained poorly understood. Therefore, it was extremely important to further elucidate the potential regulatory networks for developing appropriate treatment options. Here, the RNA-Seq high-throughput sequencing was employed to determine the genes expression change in mice undergoing spinal nerve ligation (SNL). Meanwhile, the differentially expressed genes (DEGs) were analyzed by using integrated Differential Expression and Pathway analysis (iDEP) tools and String database. Then, quantitative real-time PCR (qRT-PCR) was employed to detect the expression of hub gens. The results showed that the DEGs mainly comprised 1712 upregulated and 1515 downregulated genes at 7 days, and consisted of 243 upregulated and 357 downregulated genes at 28 days after surgery, respectively. Additionally, 133 genes and two pathways including retrograde endocannabinoid signaling and cardiac muscle contraction collectively participated in biological reactions of 7th and 28th day after operation. Moreover, the results showed that the mRNA and protein expression of Ccl5, Cacna2d1, Cacna2d2, Cacnb2, Gabrb3, GluA1, and GluA2 were significantly upregulated in SNL-7/28d group than that of in Sham-7/28d group (SNL-7d vs. Sham-7d; SNL-28d vs. Sham-28d; P < 0.05). And the level of Glra2, Glra4, Glra3, Grik1, Grik2, NR1, NR2A, and NR2B was obviously increased in SNL-7d group compared to Sham-7d group (P < 0.05), but which was no statistical difference between SNL-28d group and Sham-28d group. Therefore, these results provided new perspectives and strategies for deeply illuminating the underlying mechanism, and identifying the key elements for treating NP.
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Affiliation(s)
- Hong Yu
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Piao Zhang
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Ye-Ru Chen
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yong-Jie Wang
- Institute of Neuroscience and Collaborative Innovation Center for Brain Science, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xian-Yi Lin
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiang-Yao Li
- Institute of Neuroscience and Collaborative Innovation Center for Brain Science, School of Medicine, Zhejiang University, Hangzhou, China
| | - Gang Chen
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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15
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Hu T, Li SS, Lu MN, Zhang L, Chen B, Mao R, Mei R, Tan YX, Li S, Xiyang YB. Neuroprotection induced by Navβ2‑knockdown in APP/PS1 transgenic neurons is associated with NEP regulation. Mol Med Rep 2019; 20:2002-2011. [PMID: 31257483 DOI: 10.3892/mmr.2019.10406] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 05/29/2019] [Indexed: 11/06/2022] Open
Abstract
Voltage‑gated sodium channel β2 (Navβ2), as an unconventional substrate of β‑site amyloid precursor protein cleaving enzyme 1, is involved in regulating the neuronal surface expression of sodium channels. A previous study demonstrated that knockdown of Navβ2 protected neurons and induced spatial cognition improvement by partially reducing pathological amyloidogenic processing of amyloid precursor protein (APP) in aged APP/presenilin 1 (PS1) transgenic mice. The present study aimed to investigate whether Navβ2 knockdown altered APP metabolism via regulation of the Aβ‑degrading enzyme neprilysin (NEP). APPswe/PS1ΔE9 mice (APP/PS1 transgenic mice with a C57BL/6J genetic background) carrying a Navβ2‑knockdown mutation (APP/PS1/Navβ2‑kd) or without Navβ2 knockdown (APP/PS1) were used for cell culture and further analysis. The present results demonstrated that in APP/PS1 mouse‑derived neurons, Navβ2 knockdown partially reversed the reduction in pathological APP cleavage, and the recovery of neurite extension and neuron area. Additionally, Navβ2 knockdown increased NEP activity and levels, and the levels of intracellular domain fragment binding to the NEP promoter. The present findings suggested that knockdown of Navβ2 reversed the APP/PS1 mutation‑induced deficiency in amyloid β degradation by regulating NEP.
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Affiliation(s)
- Tao Hu
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Shan-Shan Li
- Basic Medical College, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Min-Nan Lu
- Experiment Center for Medical Science Research, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Li Zhang
- Editorial Department of Journal of Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Bo Chen
- Experiment Center for Medical Science Research, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Rui Mao
- School of Stomatology, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Rong Mei
- Department of Neurology, The First People's Hospital of Yunnan Province, Kunming, Yunnan 650032, P.R. China
| | - Ya-Xin Tan
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Shan Li
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Yan-Bin Xiyang
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
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16
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Shang JL, Cheng Q, Duan SJ, Li L, Jia LY. Cognitive improvement following ischemia/reperfusion injury induced by voluntary running‑wheel exercise is associated with LncMALAT1‑mediated apoptosis inhibition. Int J Mol Med 2018; 41:2715-2723. [PMID: 29436629 PMCID: PMC5846661 DOI: 10.3892/ijmm.2018.3484] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 01/19/2018] [Indexed: 01/16/2023] Open
Abstract
Previous human and animal studies demonstrated that voluntary exercise may improve cognitive function and facilitate neuronal plasticity in ischemia/reperfusion (I/R) models. However, the possible underlying mechanisms remain to be elucidated. Metastasis‑associated lung adenocarcinoma transcript 1 (MALAT1), a long noncoding RNA (lncRNA), may be associated with the functions and dysfunctions of endothelial cells. The present study investigated whether spontaneous running‑wheel (RW) exercise‑induced MALAT1 expression changes may be associated with the cognitive improvement of mice following I/R injury. The expression of MALAT1 was evaluated using reverse transcription‑quantitative polymerase chain reaction. Artificial MALAT1 and MALAT1 lentiviral mall interfering (siRNA) were used to alter MALAT1 expression levels in vivo. The Morris Water Maze test was performed to evaluate spatial learning and memory retention in the mice. Changes in the apoptotic rates of hippocampal neurons and levels of apoptosis‑associated proteins were also detected. The data revealed that MALAT1 increased in the hippocampus of mice in the RW‑treated I/R group and that this was associated with neurological, learning and memory improvement, reduced infarction volumes, decreased apoptosis and alterations to expression levels of apoptosis‑associated proteins. Following RW training in I/R‑injured mice, lentiviral MALAT1 siRNA conduction partially attenuated the protections induced by voluntary RW. However, exogenous MALAT1 treatment increased the protection. The current findings suggested that voluntary RW protected hippocampal neurons from I/R injury and promoted cognitive restoration, which was associated with lncRNA MALAT1‑mediated apoptosis inhibition.
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Affiliation(s)
- Jin-Lin Shang
- Neurology Department, Heji Hospital Affiliated to Changzhi Medical College, Changzhi, Shaanxi 046011, P.R. China
| | - Qing Cheng
- Geriatrics Department, Changzhi People Hospital, Changzhi, Shaanxi 046011, P.R. China
| | - Sheng-Jie Duan
- Neurology Department, Heji Hospital Affiliated to Changzhi Medical College, Changzhi, Shaanxi 046011, P.R. China
| | - Lu Li
- Neurology Department, Heji Hospital Affiliated to Changzhi Medical College, Changzhi, Shaanxi 046011, P.R. China
| | - Li-Ya Jia
- Neurology Department, Heji Hospital Affiliated to Changzhi Medical College, Changzhi, Shaanxi 046011, P.R. China
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17
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Hu T, Xiao Z, Mao R, Chen B, Lu MN, Tong J, Mei R, Li SS, Xiao ZC, Zhang LF, Xiyang YB. Navβ2 knockdown improves cognition in APP/PS1 mice by partially inhibiting seizures and APP amyloid processing. Oncotarget 2017; 8:99284-99295. [PMID: 29245901 PMCID: PMC5725092 DOI: 10.18632/oncotarget.21849] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Accepted: 10/02/2017] [Indexed: 11/25/2022] Open
Abstract
Voltage-gated sodium channels beta 2 (Navβ2, encoded by SCN2B) is a substrate of β-site amyloid precursor protein cleaving enzyme 1 (BACE1) and regulates cell surface expression of channels in neurons. Previous studies reported enhanced Navβ2 processing by BACE1 in Alzheimer’s disease (AD) model and patients. We investigated whether changes in Navβ2 expression affect neuronal seizure and amyloid precursor protein (APP) processing in an AD mouse model. Our study used eight-month-old APP/presenilin 1 (PS1) mice and transgenic Navβ2 knockdown [by 61% vs. wild type (WT)] APP/PS1 mice (APP/PS1/Navβ2-kd), with age-matched WT and Navβ2 knockdown (Navβ2-kd) mice as controls. We found that Navβ2 knockdown in APP/PS1 mice partially reversed the abnormal Navβ2 cleavage and the changes in intracellular and total Nav1.1α expression. It also restored sodium currents density in hippocampal neurons and neuronal activity, as indicated by EEG tracing; improved Morris water maze performance; and shifted APP amyloidogenic metabolism towards non-amyloidogenic processing. There were no differences in these indicators between WT and Navβ2-kd mice. These results suggest Navβ2 knockdown may be a promising strategy for treating AD.
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Affiliation(s)
- Tao Hu
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, Yunnan, PR China.,Department of Laboratory Medicine, The Third People's Hospital of Yunnan Province, Kunming, Yunnan, PR China
| | - Zhangang Xiao
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, PR China.,Key Laboratory of Medical Electrophysiology, Ministry of Education, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, PR China
| | - Rui Mao
- School of Stomatology, Kunming Medical University, Kunming, Yunnan, PR China
| | - Bo Chen
- Experiment Center for Medical Science Research, Kunming Medical University, Kunming, Yunnan, PR China
| | - Min-Nan Lu
- Experiment Center for Medical Science Research, Kunming Medical University, Kunming, Yunnan, PR China
| | - Jun Tong
- Physical Education Department, Kunming Medical University, Kunming, Yunnan, PR China
| | - Rong Mei
- Department of Neurology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, PR China
| | - Shan-Shan Li
- Basic Medical College, Kunming Medical University, Kunming, Yunnan, PR China
| | - Zhi-Cheng Xiao
- Institute of Molecular and Clinical Medicine, Kunming Medical University, Kunming, Yunnan, PR China.,Monash Immunology and Stem Cell Laboratories (MISCL), Monash University, Clayton, VIC, Australia
| | - Lian-Feng Zhang
- Key Laboratory of Human Diseases Comparative Medicine, Ministry of Health, Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences(CAMS) & Comparative Medicine Centre, Peking Union Medical College (PUMC), Beijing, China
| | - Yan-Bin Xiyang
- Institute of Neuroscience, Basic Medical College, Kunming Medical University, Kunming, Yunnan, PR China
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18
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Uddin R, Singh SM. Gene Network Construction from Microarray Data Identifies a Key Network Module and Several Candidate Hub Genes in Age-Associated Spatial Learning Impairment. Front Syst Neurosci 2017; 11:75. [PMID: 29066959 PMCID: PMC5641338 DOI: 10.3389/fnsys.2017.00075] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 09/22/2017] [Indexed: 01/06/2023] Open
Abstract
As humans age many suffer from a decrease in normal brain functions including spatial learning impairments. This study aimed to better understand the molecular mechanisms in age-associated spatial learning impairment (ASLI). We used a mathematical modeling approach implemented in Weighted Gene Co-expression Network Analysis (WGCNA) to create and compare gene network models of young (learning unimpaired) and aged (predominantly learning impaired) brains from a set of exploratory datasets in rats in the context of ASLI. The major goal was to overcome some of the limitations previously observed in the traditional meta- and pathway analysis using these data, and identify novel ASLI related genes and their networks based on co-expression relationship of genes. This analysis identified a set of network modules in the young, each of which is highly enriched with genes functioning in broad but distinct GO functional categories or biological pathways. Interestingly, the analysis pointed to a single module that was highly enriched with genes functioning in “learning and memory” related functions and pathways. Subsequent differential network analysis of this “learning and memory” module in the aged (predominantly learning impaired) rats compared to the young learning unimpaired rats allowed us to identify a set of novel ASLI candidate hub genes. Some of these genes show significant repeatability in networks generated from independent young and aged validation datasets. These hub genes are highly co-expressed with other genes in the network, which not only show differential expression but also differential co-expression and differential connectivity across age and learning impairment. The known function of these hub genes indicate that they play key roles in critical pathways, including kinase and phosphatase signaling, in functions related to various ion channels, and in maintaining neuronal integrity relating to synaptic plasticity and memory formation. Taken together, they provide a new insight and generate new hypotheses into the molecular mechanisms responsible for age associated learning impairment, including spatial learning.
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Affiliation(s)
- Raihan Uddin
- Department of Biology, University of Western Ontario, London, ON, Canada
| | - Shiva M Singh
- Department of Biology, University of Western Ontario, London, ON, Canada
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