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Christoudia N, Bekas N, Kanata E, Chatziefsthathiou A, Pettas S, Karagianni K, Da Silva Correia SM, Schmitz M, Zerr I, Tsamesidis I, Xanthopoulos K, Dafou D, Sklaviadis T. Αnti-prion effects of anthocyanins. Redox Biol 2024; 72:103133. [PMID: 38565068 PMCID: PMC10990977 DOI: 10.1016/j.redox.2024.103133] [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: 02/26/2024] [Revised: 03/22/2024] [Accepted: 03/24/2024] [Indexed: 04/04/2024] Open
Abstract
Prion diseases, also known as Transmissible Spongiform Encephalopathies (TSEs), are protein-based neurodegenerative disorders (NDs) affecting humans and animals. They are characterized by the conformational conversion of the normal cellular prion protein, PrPC, into the pathogenic isoform, PrPSc. Prion diseases are invariably fatal and despite ongoing research, no effective prophylactic or therapeutic avenues are currently available. Anthocyanins (ACNs) are unique flavonoid compounds and interest in their use as potential neuroprotective and/or therapeutic agents against NDs, has increased significantly in recent years. Therefore, we investigated the potential anti-oxidant and anti-prion effects of Oenin and Myrtillin, two of the most common anthocyanins, using the most accepted in the field overexpressing PrPScin vitro model and a cell free protein aggregation model. Our results, indicate both anthocyanins as strong anti-oxidant compounds, upregulating the expression of genes involved in the anti-oxidant response, and reducing the levels of Reactive Oxygen Species (ROS), produced due to pathogenic prion infection, through the activation of the Keap1-Nrf2 pathway. Importantly, they showcased remarkable anti-prion potential, as they not only caused the clearance of pathogenic PrPSc aggregates, but also completely inhibited the formation of PrPSc fibrils in the Cerebrospinal Fluid (CSF) of patients with Creutzfeldt-Jakob disease (CJD). Therefore, Oenin and Myrtillin possess pleiotropic effects, suggesting their potential use as promising preventive and/or therapeutic agents in prion diseases and possibly in the spectrum of neurodegenerative proteinopathies.
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Affiliation(s)
- Nikoletta Christoudia
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Nikolaos Bekas
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Eirini Kanata
- Neurodegenerative Diseases Research Group, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Athanasia Chatziefsthathiou
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Spyros Pettas
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece; Neurodegenerative Diseases Research Group, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Korina Karagianni
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Susana Margarida Da Silva Correia
- Department of Neurology, German Center for Neurodegenerative Diseases (DZNE), University Medicine Goettingen, 37075, Goettingen, Germany
| | - Matthias Schmitz
- Department of Neurology, German Center for Neurodegenerative Diseases (DZNE), University Medicine Goettingen, 37075, Goettingen, Germany.
| | - Inga Zerr
- Department of Neurology, German Center for Neurodegenerative Diseases (DZNE), University Medicine Goettingen, 37075, Goettingen, Germany.
| | - Ioannis Tsamesidis
- Department of Prosthodontics, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Konstantinos Xanthopoulos
- Neurodegenerative Diseases Research Group, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Dimitra Dafou
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Theodoros Sklaviadis
- Neurodegenerative Diseases Research Group, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
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2
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Shang NY, Huang LJ, Lan JQ, Kang YY, Tang JS, Wang HY, Li XN, Sun Z, Chen QY, Liu MY, Wen ZP, Feng XH, Wu L, Peng Y. PHPB ameliorates memory deficits and reduces oxidative injury in Alzheimer's disease mouse model by activating Nrf2 signaling pathway. Acta Pharmacol Sin 2024; 45:1142-1159. [PMID: 38409216 PMCID: PMC11130211 DOI: 10.1038/s41401-024-01240-9] [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: 10/13/2023] [Accepted: 02/06/2024] [Indexed: 02/28/2024] Open
Abstract
Alzheimer's disease (AD), a progressive neurodegenerative disorder, is the most common cause of dementia in elderly people and substantially affects patient quality of life. Oxidative stress is considered a key factor in the development of AD. Nrf2 plays a vital role in maintaining redox homeostasis and regulating neuroinflammatory responses in AD. Previous studies show that potassium 2-(1-hydroxypentyl)-benzoate (PHPB) exerts neuroprotective effects against cognitive impairment in a variety of dementia animal models such as APP/PS1 transgenic mice. In this study we investigated whether PHPB ameriorated the progression of AD by reducing oxidative stress (OS) damage. Both 5- and 13-month-old APP/PS1 mice were administered PHPB (100 mg·kg-1·d-1, i.g.) for 10 weeks. After the cognition assessment, the mice were euthanized, and the left hemisphere of the brain was harvested for analyses. We showed that 5-month-old APP/PS1 mice already exhibited impaired performance in the step-down test, and knockdown of Nrf2 gene only slightly increased the impairment, while knockdown of Nrf2 gene in 13-month-old APP/PS1 mice resulted in greatly worse performance. PHPB administration significantly ameliorated the cognition impairments and enhanced antioxidative capacity in APP/PS1 mice. In addition, PHPB administration significantly increased the p-AKT/AKT and p-GSK3β/GSK3β ratios and the expression levels of Nrf2, HO-1 and NQO-1 in APP/PS1 mice, but these changes were abolished by knockdown of Nrf2 gene. In SK-N-SH APPwt cells and primary mouse neurons, PHPB (10 μM) significantly increased the p-AKT/AKT and p-GSK3β/GSK3β ratios and the level of Nrf2, which were blocked by knockdown of Nrf2 gene. In summary, this study demonstrates that PHPB exerts a protective effect via the Akt/GSK3β/Nrf2 pathway and it might be a promising neuroprotective agent for the treatment of AD.
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Affiliation(s)
- Nian-Ying Shang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Long-Jian Huang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Jia-Qi Lan
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Yu-Ying Kang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Jing-Shu Tang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Hong-Yue Wang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Xin-Nan Li
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Zhuo Sun
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Qiu-Yu Chen
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Meng-Yao Liu
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Zi-Peng Wen
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Xin-Hong Feng
- Department of Neurology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, 102218, China
| | - Lei Wu
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Ying Peng
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China.
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3
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Carrow KP, Hamilton HL, Hopps MP, Li Y, Qiao B, Payne NC, Thompson MP, Zhang X, Magassa A, Fattah M, Agarwal S, Vincent MP, Buyanova M, Bertin PA, Mazitschek R, Olvera de la Cruz M, Johnson DA, Johnson JA, Gianneschi NC. Inhibiting the Keap1/Nrf2 Protein-Protein Interaction with Protein-Like Polymers. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2311467. [PMID: 38241649 DOI: 10.1002/adma.202311467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/11/2024] [Indexed: 01/21/2024]
Abstract
Successful and selective inhibition of the cytosolic protein-protein interaction (PPI) between nuclear factor erythroid 2-related factor 2 (Nrf2) and Kelch-like ECH-associating protein 1 (Keap1) can enhance the antioxidant response, with the potential for a therapeutic effect in a range of settings including in neurodegenerative disease (ND). Small molecule inhibitors have been developed, yet many have off-target effects, or are otherwise limited by poor cellular permeability. Peptide-based strategies have also been attempted to enhance specificity, yet face challenges due to susceptibility to degradation and lack of cellular penetration. Herein, these barriers are overcome utilizing a polymer-based proteomimetics. The protein-like polymer (PLP) consists of a synthetic, lipophilic polymer backbone displaying water soluble Keap1-binding peptides on each monomer unit forming a brush polymer architecture. The PLPs are capable of engaging Keap1 and displacing the cellular protective transcription factor Nrf2, which then translocates to the nucleus, activating the antioxidant response element (ARE). PLPs exhibit increased Keap1 binding affinity by several orders of magnitude compared to free peptides, maintain serum stability, are cell-penetrant, and selectively activate the ARE pathway in cells, including in primary cortical neuronal cultures. Keap1/Nrf2-inhibitory PLPs have the potential to impact the treatment of disease states associated with dysregulation of oxidative stress, such as NDs.
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Affiliation(s)
- Kendal P Carrow
- Department of Biomedical Engineering, McCormick School of Engineering, Medical Scientist Training Program, Feinberg School of Medicine, International Institute for Nanotechnology, Northwestern University, Evanston, 60208, IL, USA
| | - Haylee L Hamilton
- School of Pharmacy, University of Wisconsin, Madison, 57305, WI, USA
| | - Madeline P Hopps
- International Institute for Nanotechnology, Department of Chemistry, Chemistry of Life Processes Institute, Northwestern University, Evanston, 60208, IL, USA
| | - Yang Li
- Department of Chemical and Biological Engineering, McCormick School of Engineering, Northwestern University, Evanston, 60208, IL, USA
| | - Baofu Qiao
- Department of Natural Sciences, Baruch College, City University of New York, New York, 10010, NY, USA
| | - N Connor Payne
- Center for Systems Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
- Department of Chemistry & Chemical Biology, Harvard University, Cambridge, 02138, MA, USA
| | - Matthew P Thompson
- International Institute for Nanotechnology, Department of Chemistry, Chemistry of Life Processes Institute, Northwestern University, Evanston, 60208, IL, USA
| | - Xiaoyu Zhang
- International Institute for Nanotechnology, Department of Chemistry, Chemistry of Life Processes Institute, Northwestern University, Evanston, 60208, IL, USA
| | - Assa Magassa
- International Institute for Nanotechnology, Department of Chemistry, Chemistry of Life Processes Institute, Northwestern University, Evanston, 60208, IL, USA
| | - Mara Fattah
- International Institute for Nanotechnology, Department of Chemistry, Chemistry of Life Processes Institute, Northwestern University, Evanston, 60208, IL, USA
| | - Shivangi Agarwal
- Grove Biopharma, Inc, 1375 W. Fulton St., Ste. 650, Chicago, 60558, IL, USA
| | - Michael P Vincent
- Grove Biopharma, Inc, 1375 W. Fulton St., Ste. 650, Chicago, 60558, IL, USA
| | - Marina Buyanova
- Grove Biopharma, Inc, 1375 W. Fulton St., Ste. 650, Chicago, 60558, IL, USA
| | - Paul A Bertin
- Grove Biopharma, Inc, 1375 W. Fulton St., Ste. 650, Chicago, 60558, IL, USA
| | - Ralph Mazitschek
- Center for Systems Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
- Broad Institute of MIT and Harvard, Cambridge, 02142, MA, USA
- Harvard T.H. Chan School of Public Health, Boston, 02115, MA, USA
| | - Monica Olvera de la Cruz
- Department of Materials Science & Engineering, Robert R. McCormick School of Engineering and Applied Science, Center for Computation and Theory of Soft Materials, Northwestern University, Evanston, 60208, IL, USA
| | - Delinda A Johnson
- School of Pharmacy, University of Wisconsin, Madison, 57305, WI, USA
| | - Jeffrey A Johnson
- School of Pharmacy, University of Wisconsin, Madison, 57305, WI, USA
| | - Nathan C Gianneschi
- Departments of Chemistry, Materials Science & Engineering, Biomedical Engineering, Pharmacology, Simpson Querrey Institute, Chemistry of Life Processes Institute, Lurie Cancer Center, International Institute for Nanotechnology, Northwestern University, Evanston, 60208, IL, USA
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4
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Zhong MZ, Peng T, Duarte ML, Wang M, Cai D. Updates on mouse models of Alzheimer's disease. Mol Neurodegener 2024; 19:23. [PMID: 38462606 PMCID: PMC10926682 DOI: 10.1186/s13024-024-00712-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 02/14/2024] [Indexed: 03/12/2024] Open
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disease in the United States (US). Animal models, specifically mouse models have been developed to better elucidate disease mechanisms and test therapeutic strategies for AD. A large portion of effort in the field was focused on developing transgenic (Tg) mouse models through over-expression of genetic mutations associated with familial AD (FAD) patients. Newer generations of mouse models through knock-in (KI)/knock-out (KO) or CRISPR gene editing technologies, have been developed for both familial and sporadic AD risk genes with the hope to more accurately model proteinopathies without over-expression of human AD genes in mouse brains. In this review, we summarized the phenotypes of a few commonly used as well as newly developed mouse models in translational research laboratories including the presence or absence of key pathological features of AD such as amyloid and tau pathology, synaptic and neuronal degeneration as well as cognitive and behavior deficits. In addition, advantages and limitations of these AD mouse models have been elaborated along with discussions of any sex-specific features. More importantly, the omics data from available AD mouse models have been analyzed to categorize molecular signatures of each model reminiscent of human AD brain changes, with the hope to guide future selection of most suitable models for specific research questions to be addressed in the AD field.
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Affiliation(s)
- Michael Z Zhong
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Department of Biology, College of Arts and Science, Boston University, Boston, MA, 02215, USA
| | - Thomas Peng
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Science Research Program, Scarsdale High School, New York, NY, 10583, USA
| | - Mariana Lemos Duarte
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
- Research & Development, James J Peters VA Medical Center, Bronx, NY, 10468, USA.
| | - Minghui Wang
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
- Icahn Institute for Data Science and Genomic Technology, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY, 10029, USA.
- Mount Sinai Center for Transformative Disease Modeling, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY, 10029, USA.
| | - Dongming Cai
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
- Research & Development, James J Peters VA Medical Center, Bronx, NY, 10468, USA.
- Alzheimer's Disease Research Center, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
- Ronald M. Loeb Center for Alzheimer's Disease, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
- Department of Neurology, N. Bud Grossman Center for Memory Research and Care, The University of Minnesota, Minneapolis, MN, 55455, USA.
- Geriatric Research Education & Clinical Center (GRECC), The Minneapolis VA Health Care System, Minneapolis, MN, 55417, USA.
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Zang C, Liu H, Ning J, Chen Q, Jiang Y, Shang M, Yang Y, Ma J, Dong Y, Wang J, Li F, Bao X, Zhang D. Emerging role and mechanism of HACE1 in the pathogenesis of neurodegenerative diseases: A promising target. Biomed Pharmacother 2024; 172:116204. [PMID: 38364733 DOI: 10.1016/j.biopha.2024.116204] [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: 10/18/2023] [Revised: 01/15/2024] [Accepted: 01/22/2024] [Indexed: 02/18/2024] Open
Abstract
HACE1 is a member of the HECT domain-containing E3 ligases with 909 amino acid residues, containing N-terminal ankyrin-repeats (ANK) and C-terminal HECT domain. Previously, it was shown that HACE1 is inactive in human tumors and plays a crucial role in the initiation, progression, and invasion of malignant tumors. Recent studies indicated that HACE1 might be closely involved in neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, and Huntington's disease. HACE1 interacts with its substrates, including Ras-related C3 botulinum toxin substrate 1 (Rac1), nuclear factor erythroid 2-related factor 2 (Nrf2), tumor necrosis factor receptor (TNFR), and optineurin (OPTN), through which participates in several pathophysiological processes, such as oxidative stress, autophagy and inflammation. Therefore, in this review, we elaborately describe the essential substrates of HACE1 and illuminate the pathophysiological processes by which HACE1 is involved in neurodegenerative diseases. We provide a new molecular target for neurodegenerative diseases.
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Affiliation(s)
- Caixia Zang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Hui Liu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Jingwen Ning
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Qiuzhu Chen
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Yueqi Jiang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Meiyu Shang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Yang Yang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Jingwei Ma
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Yirong Dong
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Jinrong Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Fangfang Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Xiuqi Bao
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Dan Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China.
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6
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Tang Z, Chen Z, Guo M, Peng Y, Xiao Y, Guan Z, Ni R, Qi X. NRF2 Deficiency Promotes Ferroptosis of Astrocytes Mediated by Oxidative Stress in Alzheimer's Disease. Mol Neurobiol 2024:10.1007/s12035-024-04023-9. [PMID: 38401046 DOI: 10.1007/s12035-024-04023-9] [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: 08/25/2023] [Accepted: 02/06/2024] [Indexed: 02/26/2024]
Abstract
Oxidative stress is involved in the pathogenesis of Alzheimer's disease (AD), which is linked to reactive oxygen species (ROS), lipid peroxidation, and neurotoxicity. Emerging evidence suggests a role of nuclear factor (erythroid-derived 2)-like 2 (Nrf2), a major source of antioxidant response elements in AD. The molecular mechanism of oxidative stress and ferroptosis in astrocytes in AD is not yet fully understood. Here, we aimed to investigate the mechanism by which Nrf2 regulates the ferroptosis of astrocytes in AD. We found decreased expression of Nrf2 and upregulated expression of the ROS marker NADPH oxidase 4 (NOX4) in the frontal cortex from patients with AD and in the cortex of 3×Tg mice compared to wildtype mice. We demonstrated that Nrf2 deficiency led to ferroptosis-dependent oxidative stress-induced ROS with downregulated heme oxygenase-1 and glutathione peroxidase 4 and upregulated cystine glutamate expression. Moreover, Nrf2 deficiency increased lipid peroxidation, DNA oxidation, and mitochondrial fragmentation in mouse astrocytes (mAS, M1800-57). In conclusion, these results suggest that Nrf2 deficiency promotes ferroptosis of astrocytes involving oxidative stress in AD.
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Affiliation(s)
- Zhi Tang
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education and Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, 550004, China
| | - Zhuyi Chen
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education and Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, 550004, China
| | - Min Guo
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education and Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, 550004, China
| | - Yaqian Peng
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education and Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, 550004, China
| | - Yan Xiao
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education and Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, 550004, China
| | - Zhizhong Guan
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education and Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, 550004, China
- Collaborative Innovation Center for Prevention and Control of Endemic and Ethnic Regional Diseases Co-Constructed By the Province and Ministry, Guizhou, 550004, China
| | - Ruiqing Ni
- Institute for Regenerative Medicine, University of Zurich, Zurich, Switzerland.
- Institute for Biomedical Engineering, ETH Zurich and University of Zurich, Zurich, Switzerland.
| | - Xiaolan Qi
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education and Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, 550004, China.
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7
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Wang T, Sobue A, Watanabe S, Komine O, Saido TC, Saito T, Yamanaka K. Dimethyl fumarate improves cognitive impairment and neuroinflammation in mice with Alzheimer's disease. J Neuroinflammation 2024; 21:55. [PMID: 38383481 PMCID: PMC10882778 DOI: 10.1186/s12974-024-03046-2] [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: 10/03/2023] [Accepted: 02/14/2024] [Indexed: 02/23/2024] Open
Abstract
BACKGROUND Neuroinflammation substantially contributes to the pathology of Alzheimer's disease (AD), the most common form of dementia. Studies have reported that nuclear factor erythroid 2-related factor 2 (Nrf2) attenuates neuroinflammation in the mouse models of neurodegenerative diseases, however, the detailed mechanism remains unclear. METHODS The effects of dimethyl fumarate (DMF), a clinically used drug to activate the Nrf2 pathway, on neuroinflammation were analyzed in primary astrocytes and AppNL-G-F (App-KI) mice. The cognitive function and behavior of DMF-administrated App-KI mice were evaluated. For the gene expression analysis, microglia and astrocytes were directly isolated from the mouse cerebral cortex by magnetic-activated cell sorting, followed by quantitative PCR. RESULTS DMF treatment activated some Nrf2 target genes and inhibited the expression of proinflammatory markers in primary astrocytes. Moreover, chronic oral administration of DMF attenuated neuroinflammation, particularly in astrocytes, and reversed cognitive dysfunction presumably by activating the Nrf2-dependent pathway in App-KI mice. Furthermore, DMF administration inhibited the expression of STAT3/C3 and C3 receptor in astrocytes and microglia isolated from App-KI mice, respectively, suggesting that the astrocyte-microglia crosstalk is involved in neuroinflammation in mice with AD. CONCLUSION The activation of astrocytic Nrf2 signaling confers neuroprotection in mice with AD by controlling neuroinflammation, particularly by regulating astrocytic C3-STAT3 signaling. Furthermore, our study has implications for the repositioning of DMF as a drug for AD treatment.
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Affiliation(s)
- Ting Wang
- Department of Neuroscience and Pathobiology, Research Institute of Environmental Medicine, Nagoya University, Aichi, 464-8601, Japan
- Department of Neuroscience and Pathobiology, Nagoya University Graduate School of Medicine, Aichi, Japan
| | - Akira Sobue
- Department of Neuroscience and Pathobiology, Research Institute of Environmental Medicine, Nagoya University, Aichi, 464-8601, Japan.
- Medical Interactive Research and Academia Industry Collaboration Center, Research Institute of Environmental Medicine, Nagoya University, Aichi, Japan.
| | - Seiji Watanabe
- Department of Neuroscience and Pathobiology, Research Institute of Environmental Medicine, Nagoya University, Aichi, 464-8601, Japan
| | - Okiru Komine
- Department of Neuroscience and Pathobiology, Research Institute of Environmental Medicine, Nagoya University, Aichi, 464-8601, Japan
| | - Takaomi C Saido
- Laboratory for Proteolytic Neuroscience, RIKEN Center for Brain Science, Saitama, Japan
| | - Takashi Saito
- Department of Neuroscience and Pathobiology, Research Institute of Environmental Medicine, Nagoya University, Aichi, 464-8601, Japan
- Department of Neurocognitive Science, Institute of Brain Science, Nagoya City University Graduate School of Medical Sciences, Aichi, Japan
| | - Koji Yamanaka
- Department of Neuroscience and Pathobiology, Research Institute of Environmental Medicine, Nagoya University, Aichi, 464-8601, Japan.
- Department of Neuroscience and Pathobiology, Nagoya University Graduate School of Medicine, Aichi, Japan.
- Institute for Glyco-Core Research (iGCORE), Nagoya University, Aichi, Japan.
- Center for One Medicine Innovative Translational Research (COMIT), Nagoya University, Nagoya, Aichi, Japan.
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8
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Unno K, Taguchi K, Hase T, Meguro S, Nakamura Y. DNA Mutagenicity of Hydroxyhydroquinone in Roasted Coffee Products and Its Suppression by Chlorogenic Acid, a Coffee Polyphenol, in Oxidative-Damage-Sensitive SAMP8 Mice. Int J Mol Sci 2024; 25:720. [PMID: 38255794 PMCID: PMC10815437 DOI: 10.3390/ijms25020720] [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: 11/24/2023] [Revised: 12/21/2023] [Accepted: 01/03/2024] [Indexed: 01/24/2024] Open
Abstract
Hydroxyhydroquinone (HHQ) is an oxidative component produced by roasting coffee beans and has been reported to generate relatively large amounts of reactive oxygen species (ROS). In this study, we used senescence-accelerated mouse prone 8 (SAMP8) mice to determine whether HHQ consumption increases oxidative-stress-induced injury, because in SAMP8 mice, the activity of 8-oxoguanine DNA glycosylase 1, which repairs oxidative modifications in DNA, is decreased. The results showed that two out of twelve (16.7%) HHQ-treated mice presented polyuria and glucosuria around 2 months after the start of treatment, indicating that HHQ may act as a mutagen against SAMP8 mice, which is sensitive to oxidative damage. No abnormalities were observed in the chlorogenic acid (coffee polyphenol, CPP)-treated group. The concentration of hydrogen peroxide in the serum of SAMP8 mice was significantly higher than that in SAMR1 (senescence-resistant) control mice, and the concentration was further increased in the HHQ-treated group. CPP, when coexisting with HHQ at the rate contained in roasted coffee, decreased the amount of hydrogen peroxide in the serum of SAMP8 mice. Although CPP can act both oxidatively and antioxidatively as a polyphenol, CPP acts more antioxidatively when coexisting with HHQ. Thus, the oxidative effect of HHQ was shown to be counteracted by CPP.
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Affiliation(s)
- Keiko Unno
- Tea Science Center, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan; (K.T.); (Y.N.)
| | - Kyoko Taguchi
- Tea Science Center, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan; (K.T.); (Y.N.)
| | - Tadashi Hase
- Research and Development, Kao Corporation, 2-1-3 Bunka, Sumida-ku, Tokyo 131-8501, Japan;
| | - Shinichi Meguro
- Biological Science Research, Kao Corporation, Akabane, Ichikai-machi, Haga-gun 321-3497, Japan;
| | - Yoriyuki Nakamura
- Tea Science Center, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan; (K.T.); (Y.N.)
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9
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Zamanian MY, Soltani A, Khodarahmi Z, Alameri AA, Alwan AMR, Ramírez-Coronel AA, Obaid RF, Abosaooda M, Heidari M, Golmohammadi M, Anoush M. Targeting Nrf2 signaling pathway by quercetin in the prevention and treatment of neurological disorders: An overview and update on new developments. Fundam Clin Pharmacol 2023; 37:1050-1064. [PMID: 37259891 DOI: 10.1111/fcp.12926] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 04/16/2023] [Accepted: 05/26/2023] [Indexed: 06/02/2023]
Abstract
BACKGROUND Neurological disorders (NLDs) are widely acknowledged as a significant public health concern worldwide. Stroke, Alzheimer's disease (AD), and traumatic brain injury (TBI) are three of these disorders that have sparked major study attention. Neurological dysfunction, protein buildup, oxidation and neuronal injury, and aberrant mitochondria are all prevalent neuropathological hallmarks of these disorders. The signaling cascade of nuclear factor erythroid 2 related factor 2 (Nrf2) shares all of them as a common target. Several studies have found that overexpression of Nrf2 is a promising treatment method in NLDs. Effective treatment of these disorders continues to be a universal concern regardless of various medicines. In order to treat a variety of neurological problems, organic remedies may provide an alternative treatment. It has been demonstrated that polyphenols like quercetin (Que) offer considerable capabilities for treating NLDs. One of Que's greatest key targets, Nrf2, has the capacity to control the production of a number of cytoprotective enzymes that exhibit neuroprotective, detoxifying, and antioxidative effects. Additionally, Que enhanced the expression of Nrf2 and inhibited alterations in the shape and death of neurons in the hippocampus. OBJECTIVE In this review, we have focused on Que's medicinal prospects as a neuroprotective drug. METHODS PubMed, Scopus, Science Direct, and Google Scholar were used to search articles for this study. RESULTS The findings of this research demonstrate that (1) Que protected the blood-brain barrier via stimulating Nrf2 in animal stroke, which alleviated ischemic reperfusion and motor dysfunction. (2) By triggering the Nrf2 pathway, Que reduced the neuroinflammation and oxidative damage brought on by TBI in the cortex. (3) In an experimental model of AD, Que enhanced cognitive function by decreasing A1-4, antioxidant activity, and Nrf2 levels in the brain. CONCLUSION We discuss recent research on Que-mediated Nrf2 expression in the management of several NLDs in this paper.
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Affiliation(s)
- Mohammad Yasin Zamanian
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
- Department of Pharmacology and Toxicology, School of Pharmacy, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Afsaneh Soltani
- School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Zahra Khodarahmi
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | | | - Athemar M R Alwan
- Department of Radiological Techniques, Al-Mustaqbal University College, Babylon, Iraq
| | - Andrés Alexis Ramírez-Coronel
- Azogues Campus Nursing Career, Health and Behavior Research Group (HBR), Psychometry and Ethology Laboratory, Catholic University of Cuenca, Cuenca, Ecuador
- Doctorate in Psychology, University of Palermo, Buenos Aires, Argentina
- Epidemiology and Biostatistics Research Group, CES University, Medellín, Colombia
| | | | - Munther Abosaooda
- Epidemiology and Biostatistics Research Group, CES University, Medellín, Colombia
| | - Mahsa Heidari
- Department of Biochemistry, Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran
| | - Maryam Golmohammadi
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahdieh Anoush
- Department of Pharmacology and Toxicology, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran
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10
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Chen WT, Dodson M. The untapped potential of targeting NRF2 in neurodegenerative disease. FRONTIERS IN AGING 2023; 4:1270838. [PMID: 37840813 PMCID: PMC10569223 DOI: 10.3389/fragi.2023.1270838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 09/18/2023] [Indexed: 10/17/2023]
Abstract
Since its initial discovery almost three decades ago, the transcription factor nuclear factor erythroid 2-related factor 2 (NRF2) has been shown to regulate a host of downstream transcriptional responses and play a critical role in preventing or promoting disease progression depending on the context. Critically, while the importance of proper nuclear factor erythroid 2-related factor 2 function has been demonstrated across a variety of pathological settings, the ability to progress NRF2-targeted therapeutics to clinic has remained frustratingly elusive. This is particularly true in the case of age-related pathologies, where nuclear factor erythroid 2-related factor 2 is a well-established mitigator of many of the observed pathogenic effects, yet options to target this pathway remain limited. Along these lines, loss of nuclear factor erythroid 2-related factor 2 function has clearly been shown to enhance neuropathological outcomes, with enhancing nuclear factor erythroid 2-related factor 2 pathway activation to prevent neurodegenerative/neurological disease progression continuing to be an active area of interest. One critical obstacle in generating successful therapeutics for brain-related pathologies is the ability of the compound to cross the blood brain barrier (BBB), which has also hampered the implementation of several promising nuclear factor erythroid 2-related factor 2 inducers. Another limitation is that many nuclear factor erythroid 2-related factor 2 activators have undesirable off-target effects due to their electrophilic nature. Despite these constraints, the field has continued to evolve, and several viable means of targeting nuclear factor erythroid 2-related factor 2 in a neuropathological context have emerged. In this perspective, we will briefly discuss the key findings and promising therapeutic options that have been discovered to date, as well as highlight emerging areas of NRF2-neurodegeneration research that provide hope for successfully targeting this pathway in the future.
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Affiliation(s)
| | - Matthew Dodson
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, United States
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11
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Riordan R, Rong W, Yu Z, Ross G, Valerio J, Dimas-Muñoz J, Heredia V, Magnusson K, Galvan V, Perez VI. Effect of Nrf2 loss on senescence and cognition of tau-based P301S mice. GeroScience 2023; 45:1451-1469. [PMID: 36976489 PMCID: PMC10400516 DOI: 10.1007/s11357-023-00760-2] [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: 12/05/2022] [Accepted: 02/20/2023] [Indexed: 03/29/2023] Open
Abstract
Cellular senescence may contribute to chronic inflammation involved in the progression of age-related diseases such as Alzheimer's disease (AD), and its removal prevents cognitive impairment in a model of tauopathy. Nrf2, the major transcription factor for damage response pathways and regulators of inflammation, declines with age. Our previous work showed that silencing Nrf2 gives rise to premature senescence in cells and mice. Others have shown that Nrf2 ablation can exacerbate cognitive phenotypes of some AD models. In this study, we aimed to understand the relationship between Nrf2 elimination, senescence, and cognitive impairment in AD, by generating a mouse model expressing a mutant human tau transgene in an Nrf2 knockout (Nrf2KO) background. We assessed senescent cell burden and cognitive decline of P301S mice in the presence and absence of Nrf2. Lastly, we administered 4.5-month-long treatments with two senotherapeutic drugs to analyze their potential to prevent senescent cell burden and cognitive decline: the senolytic drugs dasatinib and quercetin (DQ) and the senomorphic drug rapamycin. Nrf2 loss accelerated the onset of hind-limb paralysis in P301S mice. At 8.5 months of age, P301S mice did not exhibit memory deficits, while P301S mice without Nrf2 were significantly impaired. However, markers of senescence were not elevated by Nrf2 ablation in any of tissues that we examined. Neither drug treatment improved cognitive performance, nor did it reduce expression of senescence markers in brains of P301S mice. Contrarily, rapamycin treatment at the doses used delayed spatial learning and led to a modest decrease in spatial memory. Taken together, our data suggests that the emergence of senescence may be causally associated with onset of cognitive decline in the P301S model, indicate that Nrf2 protects brain function in a model of AD through mechanisms that may include, but do not require the inhibition of senescence, and suggest possible limitations for DQ and rapamycin as therapies for AD.
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Affiliation(s)
- Ruben Riordan
- Department of Biochemistry and Biophysics, Linus Pauling Institute, Oregon State University, 351 Linus Pauling Science Center, Corvallis, OR, 97331, USA
- Linus Pauling Institute, Oregon State University, Corvallis, OR, USA
| | - Wang Rong
- Department of Biochemistry and Biophysics, Linus Pauling Institute, Oregon State University, 351 Linus Pauling Science Center, Corvallis, OR, 97331, USA
- Linus Pauling Institute, Oregon State University, Corvallis, OR, USA
| | - Zhen Yu
- Department of Biochemistry and Biophysics, Linus Pauling Institute, Oregon State University, 351 Linus Pauling Science Center, Corvallis, OR, 97331, USA
- Linus Pauling Institute, Oregon State University, Corvallis, OR, USA
| | - Grace Ross
- Department of Biochemistry and Biophysics, Linus Pauling Institute, Oregon State University, 351 Linus Pauling Science Center, Corvallis, OR, 97331, USA
- Linus Pauling Institute, Oregon State University, Corvallis, OR, USA
| | - Juno Valerio
- Department of Biochemistry and Biophysics, Linus Pauling Institute, Oregon State University, 351 Linus Pauling Science Center, Corvallis, OR, 97331, USA
- Linus Pauling Institute, Oregon State University, Corvallis, OR, USA
| | - Jovita Dimas-Muñoz
- Department of Biochemistry and Biophysics, Linus Pauling Institute, Oregon State University, 351 Linus Pauling Science Center, Corvallis, OR, 97331, USA
- Linus Pauling Institute, Oregon State University, Corvallis, OR, USA
| | - Valeria Heredia
- Department of Biochemistry and Biophysics, Linus Pauling Institute, Oregon State University, 351 Linus Pauling Science Center, Corvallis, OR, 97331, USA
- Linus Pauling Institute, Oregon State University, Corvallis, OR, USA
| | - Kathy Magnusson
- Linus Pauling Institute, Oregon State University, Corvallis, OR, USA
- Department of Biomedical Sciences, Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR, USA
| | - Veronica Galvan
- Department of Biochemistry and Molecular Biology, Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, 740 Stanton L. Young Bvd BMSB 821, Oklahoma City, OK, 73104, USA.
- Oklahoma City VA Medical Center, US Department of Veterans Affairs, Oklahoma City, OK, USA.
| | - Viviana I Perez
- Department of Biochemistry and Biophysics, Linus Pauling Institute, Oregon State University, 351 Linus Pauling Science Center, Corvallis, OR, 97331, USA.
- Linus Pauling Institute, Oregon State University, Corvallis, OR, USA.
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12
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Araki W. Aβ Oligomer Toxicity-Reducing Therapy for the Prevention of Alzheimer's Disease: Importance of the Nrf2 and PPARγ Pathways. Cells 2023; 12:1386. [PMID: 37408220 DOI: 10.3390/cells12101386] [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: 03/29/2023] [Revised: 04/30/2023] [Accepted: 05/09/2023] [Indexed: 07/07/2023] Open
Abstract
Recent studies have revealed that soluble amyloid-β oligomers (AβOs) play a pathogenetic role in Alzheimer's disease (AD). Indeed, AβOs induce neurotoxic and synaptotoxic effects and are also critically involved in neuroinflammation. Oxidative stress appears to be a crucial event underlying these pathological effects of AβOs. From a therapeutic standpoint, new drugs for AD designed to remove AβOs or inhibit the formation of AβOs are currently being developed. However, it is also worth considering strategies for preventing AβO toxicity itself. In particular, small molecules with AβO toxicity-reducing activity have potential as drug candidates. Among such small molecules, those that can enhance Nrf2 and/or PPARγ activity can effectively inhibit AβO toxicity. In this review, I summarize studies on the small molecules that counteract AβO toxicity and are capable of activating Nrf2 and/or PPARγ. I also discuss how these interrelated pathways are involved in the mechanisms by which these small molecules prevent AβO-induced neurotoxicity and neuroinflammation. I propose that AβO toxicity-reducing therapy, designated ATR-T, could be a beneficial, complementary strategy for the prevention and treatment of AD.
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Affiliation(s)
- Wataru Araki
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8510, Japan
- Memory Clinic Ochanomizu, Bunkyo-ku, Tokyo 113-8510, Japan
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13
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Manjunath SH, Nataraj P, Swamy VH, Sugur K, Dey SK, Ranganathan V, Daniel S, Leihang Z, Sharon V, Chandrashekharappa S, Sajeev N, Venkatareddy VG, Chuturgoon A, Kuppusamy G, Madhunapantula SV, Thimmulappa RK. Development of Moringa oleifera as functional food targeting NRF2 signaling: antioxidant and anti-inflammatory activity in experimental model systems. Food Funct 2023; 14:4734-4751. [PMID: 37114361 DOI: 10.1039/d3fo00572k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
Pharmacological activation of nuclear factor erythroid 2 related factor 2 (NRF2) provides protection against several environmental diseases by inhibiting oxidative and inflammatory injury. Besides high in protein and minerals, Moringa oleifera leaves contain several bioactive compounds, predominantly isothiocyanate moringin and polyphenols, which are potent inducers of NRF2. Hence, M. oleifera leaves represent a valuable food source that could be developed as a functional food for targeting NRF2 signaling. In the current study, we have developed a palatable M. oleifera leaf preparation (henceforth referred as ME-D) that showed reproducibly a high potential to activate NRF2. Treatment of BEAS-2B cells with ME-D significantly increased NRF2-regulated antioxidant genes (NQO1, HMOX1) and total GSH levels. In the presence of brusatol (a NRF2 inhibitor), ME-D-induced increase in NQO1 expression was significantly diminished. Pre-treatment of cells with ME-D mitigated reactive oxygen species, lipid peroxidation and cytotoxicity induced by pro-oxidants. Furthermore, ME-D pre-treatment markedly inhibited nitric oxide production, secretory IL-6 and TNF-α levels, and transcriptional expression of Nos2, Il-6, and Tnf-α in macrophages exposed to lipopolysaccharide. Biochemical profiling by LC-HRMS revealed glucomoringin, moringin, and several polyphenols in ME-D. Oral administration of ME-D significantly increased NRF2-regulated antioxidant genes in the small intestine, liver, and lungs. Lastly, prophylactic administration of ME-D significantly mitigated lung inflammation in mice exposed to particulate matter for 3-days or 3-months. In conclusion, we have developed a pharmacologically active standardized palatable preparation of M. oleifera leaves as a functional food to activate NRF2 signaling, which can be consumed as a beverage (hot soup) or freeze-dried powder for reducing the risk from environmental respiratory disease.
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Affiliation(s)
- Souparnika H Manjunath
- Department of Biochemistry, Centre of Excellence in Molecular biology & Regenerative Medicine, Jagadguru Sri Shivarathreeshwara (JSS) Medical College, JSS Academy of Higher Education & Research (JSS AHER), Mysore, Karnataka, 570015, India.
| | - Prabhakaran Nataraj
- Department of Studies in Environmental Sciences, University of Mysore, Mysore, Karnataka, 570005, India
| | - Vikas H Swamy
- Department of Biochemistry, School of Life Science, JSS AHER, Mysore, Karnataka, 570015, India
| | - Kavya Sugur
- Department of Biochemistry, Centre of Excellence in Molecular biology & Regenerative Medicine, Jagadguru Sri Shivarathreeshwara (JSS) Medical College, JSS Academy of Higher Education & Research (JSS AHER), Mysore, Karnataka, 570015, India.
| | - Sumit K Dey
- Department of Biochemistry, Centre of Excellence in Molecular biology & Regenerative Medicine, Jagadguru Sri Shivarathreeshwara (JSS) Medical College, JSS Academy of Higher Education & Research (JSS AHER), Mysore, Karnataka, 570015, India.
| | - Veena Ranganathan
- Department of Biochemistry, Centre of Excellence in Molecular biology & Regenerative Medicine, Jagadguru Sri Shivarathreeshwara (JSS) Medical College, JSS Academy of Higher Education & Research (JSS AHER), Mysore, Karnataka, 570015, India.
| | - Shyni Daniel
- Department of Studies in Environmental Sciences, University of Mysore, Mysore, Karnataka, 570005, India
| | - Zonunsiami Leihang
- Department of Biochemistry, Centre of Excellence in Molecular biology & Regenerative Medicine, Jagadguru Sri Shivarathreeshwara (JSS) Medical College, JSS Academy of Higher Education & Research (JSS AHER), Mysore, Karnataka, 570015, India.
| | - Veronica Sharon
- Department of Biochemistry, Centre of Excellence in Molecular biology & Regenerative Medicine, Jagadguru Sri Shivarathreeshwara (JSS) Medical College, JSS Academy of Higher Education & Research (JSS AHER), Mysore, Karnataka, 570015, India.
| | - Sandeep Chandrashekharappa
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER-R) Raebareli, Transit Campus, Lucknow, UP 226002, India
| | - Nithin Sajeev
- SCIEX, DHR Holding India Pvt Ltd, Bangalore 562149, India
| | | | - Anil Chuturgoon
- Discipline of Medical Biochemistry, University of Kwa-Zulu Natal, Durban 4041, South Africa
| | - Gowthamarajan Kuppusamy
- Department of Pharmaceutics, JSS College of Pharmacy, JSS AHER, Ooty, Nilgiris, Tamil Nadu 643001, India
| | - SubbaRao V Madhunapantula
- Department of Biochemistry, Centre of Excellence in Molecular biology & Regenerative Medicine, Jagadguru Sri Shivarathreeshwara (JSS) Medical College, JSS Academy of Higher Education & Research (JSS AHER), Mysore, Karnataka, 570015, India.
| | - Rajesh K Thimmulappa
- Department of Biochemistry, Centre of Excellence in Molecular biology & Regenerative Medicine, Jagadguru Sri Shivarathreeshwara (JSS) Medical College, JSS Academy of Higher Education & Research (JSS AHER), Mysore, Karnataka, 570015, India.
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14
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Lee N, Youn K, Yoon JH, Lee B, Kim DH, Jun M. The Role of Fucoxanthin as a Potent Nrf2 Activator via Akt/GSK-3β/Fyn Axis against Amyloid-β Peptide-Induced Oxidative Damage. Antioxidants (Basel) 2023; 12:antiox12030629. [PMID: 36978877 PMCID: PMC10045033 DOI: 10.3390/antiox12030629] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 02/24/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023] Open
Abstract
Increasing evidence is suggesting that amyloid-β peptide (Aβ), a characteristic of Alzheimer’s disease (AD), induces oxidative stress and mitochondrial dysfunction, leading to neuronal death. This study aimed to demonstrate the antioxidant and anti-apoptotic effects of fucoxanthin, a major marine carotenoid found in brown algae, against neuronal injury caused by Aβ. Non-toxic dose range of fucoxanthin (0.1–5 µM) were selected for the neuroprotective study against Aβ25–35. The PC12 cells were pretreated with different concentrations of fucoxanthin for 1 h before being exposed to 10 µM Aβ25–35 for another 24 h. The present results showed that fucoxanthin inhibited Aβ25-35-induced cell death by recovering cell cycle arrest and decreasing intracellular reactive oxygen species (ROS) level. The compound enhanced mitochondrial recovery and regulated apoptosis related proteins including B-cell lymphoma 2 (Bcl-2) and Bcl-2-associated X protein (Bax) from Aβ25-35-induced oxidative stress. Concomitantly, fucoxanthin increased the expression of nuclear factor E2-related factor 2 (Nrf2) and its downstream phase II detoxifying enzymes including NADPH: quinone oxidoreductase-1 (NQO-1), glutamate cysteine ligase modifier subunit (GCLm), and thioredoxin reductase 1 (TrxR1), whereas it decreased the expression of cytoplasmic Kelch-like ECH-associated protein 1 (Keap1). Moreover, pretreatment of fucoxanthin reduced Fyn phosphorylation via protein kinase B (Akt)-mediated inhibition of glycogen synthase kinase-3β (GSK-3β), which increased the nuclear localization of Nrf2, suggesting that the compound enhanced Nrf2 expression by the activation of upstream kinase as well as the dissociation of the Nrf2-Keap1 complex. Further validation with a specific phosphatidylinositol 3-kinase (PI3K) inhibitor LY294002 demonstrated that the fucoxanthin-mediated Nrf2 antioxidant defense system was directly associated with the Akt/GSK-3β/Fyn signaling pathway. In silico simulation revealed that the oxygen groups of fucoxanthin participated in potent interactions with target markers in the Nrf2 signaling pathway, which may affect the biological activity of target markers. Taken together, the present results demonstrated that the preventive role of fucoxanthin on Aβ-stimulated oxidative injury and apoptosis via Akt/GSK-3β/Fyn signaling pathway. This study would provide a useful approach for potential intervention for AD prevention.
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Affiliation(s)
- Nayoung Lee
- Department of Health Sciences, The Graduate School of Dong-A University, Busan 49315, Republic of Korea
| | - Kumju Youn
- Department of Food Science and Nutrition, Dong-A University, Busan 49315, Republic of Korea
| | - Jeong-Hyun Yoon
- Department of Health Sciences, The Graduate School of Dong-A University, Busan 49315, Republic of Korea
| | - Bokyung Lee
- Department of Food Science and Nutrition, Dong-A University, Busan 49315, Republic of Korea
| | - Dong Hyun Kim
- Department of Pharmacology and Department of Advanced Translational Medicine, School of Medicine, Konkuk University, Seoul 05029, Republic of Korea
- Correspondence: (D.H.K.); (M.J.)
| | - Mira Jun
- Department of Health Sciences, The Graduate School of Dong-A University, Busan 49315, Republic of Korea
- Department of Food Science and Nutrition, Dong-A University, Busan 49315, Republic of Korea
- Center for Food & Bio Innovation, Dong-A University, Busan 49315, Republic of Korea
- Correspondence: (D.H.K.); (M.J.)
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15
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Butterfield DA, Boyd-Kimball D, Reed TT. Cellular Stress Response (Hormesis) in Response to Bioactive Nutraceuticals with Relevance to Alzheimer Disease. Antioxid Redox Signal 2023; 38:643-669. [PMID: 36656673 PMCID: PMC10025851 DOI: 10.1089/ars.2022.0214] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 01/08/2023] [Indexed: 01/20/2023]
Abstract
Significance: Alzheimer's disease (AD) is the most common form of dementia associated with aging. As the large Baby Boomer population ages, risk of developing AD increases significantly, and this portion of the population will increase significantly over the next several decades. Recent Advances: Research suggests that a delay in the age of onset by 5 years can dramatically decrease both the incidence and cost of AD. In this review, the role of nuclear factor erythroid 2-related factor 2 (Nrf2) in AD is examined in the context of heme oxygenase-1 (HO-1) and biliverdin reductase-A (BVR-A) and the beneficial potential of selected bioactive nutraceuticals. Critical Issues: Nrf2, a transcription factor that binds to enhancer sequences in antioxidant response elements (ARE) of DNA, is significantly decreased in AD brain. Downstream targets of Nrf2 include, among other proteins, HO-1. BVR-A is activated when biliverdin is produced. Both HO-1 and BVR-A also are oxidatively or nitrosatively modified in AD brain and in its earlier stage, amnestic mild cognitive impairment (MCI), contributing to the oxidative stress, altered insulin signaling, and cellular damage observed in the pathogenesis and progression of AD. Bioactive nutraceuticals exhibit anti-inflammatory, antioxidant, and neuroprotective properties and are potential topics of future clinical research. Specifically, ferulic acid ethyl ester, sulforaphane, epigallocatechin-3-gallate, and resveratrol target Nrf2 and have shown potential to delay the progression of AD in animal models and in some studies involving MCI patients. Future Directions: Understanding the regulation of Nrf2 and its downstream targets can potentially elucidate therapeutic options for delaying the progression of AD. Antioxid. Redox Signal. 38, 643-669.
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Affiliation(s)
- D. Allan Butterfield
- Department of Chemistry, University of Kentucky, Lexington, Kentucky, USA
- Sanders-Brown Center on Aging, University of Kentucky, Lexington, Kentucky, USA
| | - Debra Boyd-Kimball
- Department of Biochemistry, Chemistry, and Physics, University of Mount Union, Alliance, Ohio, USA
| | - Tanea T. Reed
- Department of Chemistry, Eastern Kentucky University, Richmond, Kentucky, USA
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16
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Vogrinc D, Gregorič Kramberger M, Emeršič A, Čučnik S, Goričar K, Dolžan V. Genetic Polymorphisms in Oxidative Stress and Inflammatory Pathways as Potential Biomarkers in Alzheimer's Disease and Dementia. Antioxidants (Basel) 2023; 12:antiox12020316. [PMID: 36829875 PMCID: PMC9952323 DOI: 10.3390/antiox12020316] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 01/12/2023] [Accepted: 01/27/2023] [Indexed: 01/31/2023] Open
Abstract
Oxidative stress and neuroinflammation are important processes involved in Alzheimer's disease (AD) and mild cognitive impairment (MCI). Numerous risk factors, including genetic background, can affect the complex interplay between those mechanisms in the aging brain and can also affect typical AD hallmarks: amyloid plaques and neurofibrillary tangles. Our aim was to evaluate the association of polymorphisms in oxidative stress- and inflammation-related genes with cerebrospinal fluid (CSF) biomarker levels and cognitive test results. The study included 54 AD patients, 14 MCI patients with pathological CSF biomarker levels, 20 MCI patients with normal CSF biomarker levels and 62 controls. Carriers of two polymorphic IL1B rs16944 alleles had higher CSF Aβ1-42 levels (p = 0.025), while carriers of at least one polymorphic NFE2L2 rs35652124 allele had lower CSF Aβ1-42 levels (p = 0.040). Association with IL1B rs16944 remained significant in the AD group (p = 0.029). Additionally, MIR146A rs2910164 was associated with Aβ42/40 ratio (p = 0.043) in AD. Significant associations with cognitive test scores were observed for CAT rs1001179 (p = 0.022), GSTP1 rs1138272 (p = 0.005), KEAP1 rs1048290 and rs9676881 (both p = 0.019), as well as NFE2L2 rs35652124 (p = 0.030). In the AD group, IL1B rs1071676 (p = 0.004), KEAP1 rs1048290 and rs9676881 (both p = 0.035) remained associated with cognitive scores. Polymorphisms in antioxidative and inflammation genes might be associated with CSF biomarkers and cognitive test scores and could serve as additional biomarkers contributing to early diagnosis of dementia.
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Affiliation(s)
- David Vogrinc
- Pharmacogenetics Laboratory, Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Milica Gregorič Kramberger
- Department of Neurology, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia
- Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Andreja Emeršič
- Department of Neurology, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia
| | - Saša Čučnik
- Department of Neurology, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia
- Department of Rheumatology, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia
- Faculty of Pharmacy, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Katja Goričar
- Pharmacogenetics Laboratory, Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Vita Dolžan
- Pharmacogenetics Laboratory, Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
- Correspondence:
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17
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Das TK, Ganesh BP. Interlink between the gut microbiota and inflammation in the context of oxidative stress in Alzheimer's disease progression. Gut Microbes 2023; 15:2206504. [PMID: 37127846 PMCID: PMC10153019 DOI: 10.1080/19490976.2023.2206504] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/03/2023] Open
Abstract
The microbiota-gut-brain axis is an important pathway of communication and may dynamically contribute to Alzheimer's disease (AD) pathogenesis. Pathological commensal gut microbiota alterations, termed as dysbiosis, can influence intestinal permeability and break the blood-brain barrier which may trigger AD pathogenesis via redox signaling, neuronal, immune, and metabolic pathways. Dysbiosis increases the oxidative stress. Oxidants affect the innate immune system through recognizing microbial-derived pathogens by Toll-like receptors and initiating the inflammatory process. Most of the gut microbiome research work highlights the relationship between the gut microbiota and AD, but the contributory connection between precise bacteria and brain dysfunction in AD pathology cannot be fully demonstrated. Here, we summarize the current information of the fundamental connections between oxidative stress, inflammation, and gut dysbiosis in AD. This review emphasizes on the involvement of gut microbiota in the regulation of oxidative stress, inflammation, immune responses including central and peripheral cross-talk. It provides insights for novel preventative and therapeutic approaches in AD.
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Affiliation(s)
- Tushar K Das
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Bhanu P Ganesh
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA
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18
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Role of Nrf2 in aging, Alzheimer's and other neurodegenerative diseases. Ageing Res Rev 2022; 82:101756. [PMID: 36243357 DOI: 10.1016/j.arr.2022.101756] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 09/14/2022] [Accepted: 10/09/2022] [Indexed: 01/31/2023]
Abstract
Nuclear Factor-Erythroid Factor 2 (Nrf2) is an important transcription factor that regulates the expression of large number of genes in healthy and disease states. Nrf2 is made up of 605 amino acids and contains 7 conserved regions known as Nrf2-ECH homology domains. Nrf2 regulates the expression of several key components of oxidative stress, mitochondrial biogenesis, mitophagy, autophagy and mitochondrial function in all organs of the human body, in the peripheral and central nervous systems. Mounting evidence also suggests that altered expression of Nrf2 is largely involved in aging, neurodegenerative diseases, including Alzheimer's disease, Parkinson's disease, Huntington's diseases, Amyotrophic lateral sclerosis, Stroke, Multiple sclerosis and others. The purpose of this article is to detail the essential role of Nrf2 in oxidative stress, antioxidative defense, detoxification, inflammatory responses, transcription factors, proteasomal and autophagic/mitophagic degradation, and metabolism in aging and neurodegenerative diseases. This article also highlights the Nrf2 structural and functional activities in healthy and disease states, and also discusses the current status of Nrf2 research and therapeutic strategies to treat aging and neurodegenerative diseases.
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Li RL, Wang LY, Duan HX, Zhang Q, Guo X, Wu C, Peng W. Regulation of mitochondrial dysfunction induced cell apoptosis is a potential therapeutic strategy for herbal medicine to treat neurodegenerative diseases. Front Pharmacol 2022; 13:937289. [PMID: 36210852 PMCID: PMC9535092 DOI: 10.3389/fphar.2022.937289] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 08/11/2022] [Indexed: 11/13/2022] Open
Abstract
Neurodegenerative disease is a progressive neurodegeneration caused by genetic and environmental factors. Alzheimer’s disease (AD), Parkinson’s disease (PD), and Huntington’s disease (HD) are the three most common neurodegenerative diseases clinically. Unfortunately, the incidence of neurodegenerative diseases is increasing year by year. However, the current available drugs have poor efficacy and large side effects, which brings a great burden to the patients and the society. Increasing evidence suggests that occurrence and development of the neurodegenerative diseases is closely related to the mitochondrial dysfunction, which can affect mitochondrial biogenesis, mitochondrial dynamics, as well as mitochondrial mitophagy. Through the disruption of mitochondrial homeostasis, nerve cells undergo varying degrees of apoptosis. Interestingly, it has been shown in recent years that the natural agents derived from herbal medicines are beneficial for prevention/treatment of neurodegenerative diseases via regulation of mitochondrial dysfunction. Therefore, in this review, we will focus on the potential therapeutic agents from herbal medicines for treating neurodegenerative diseases via suppressing apoptosis through regulation of mitochondrial dysfunction, in order to provide a foundation for the development of more candidate drugs for neurodegenerative diseases from herbal medicine.
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Affiliation(s)
- Ruo-Lan Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Ling-Yu Wang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Hu-Xinyue Duan
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Qing Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xiaohui Guo
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
- *Correspondence: Xiaohui Guo, ; Chunjie Wu, ; Wei Peng,
| | - Chunjie Wu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- *Correspondence: Xiaohui Guo, ; Chunjie Wu, ; Wei Peng,
| | - Wei Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- *Correspondence: Xiaohui Guo, ; Chunjie Wu, ; Wei Peng,
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20
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Ginsenoside and Its Therapeutic Potential for Cognitive Impairment. Biomolecules 2022; 12:biom12091310. [PMID: 36139149 PMCID: PMC9496100 DOI: 10.3390/biom12091310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/12/2022] [Accepted: 09/13/2022] [Indexed: 11/16/2022] Open
Abstract
Cognitive impairment (CI) is one of the major clinical features of many neurodegenerative diseases. It can be aging-related or even appear in non-central nerve system (CNS) diseases. CI has a wide spectrum that ranges from the cognitive complaint with normal screening tests to mild CI and, at its end, dementia. Ginsenosides, agents extracted from a key Chinese herbal medicine (ginseng), show great promise as a new therapeutic option for treating CI. This review covered both clinical trials and preclinical studies to summarize the possible mechanisms of how ginsenosides affect CI in different diseases. It shows that ginsenosides can modulate signaling pathways associated with oxidative stress, apoptosis, inflammation, synaptic plasticity, and neurogenesis. The involved signaling pathways mainly include the PI3K/Akt, CREB/BDNF, Keap1/Nrf2 signaling, and NF-κB/NLRP3 inflammasome pathways. We hope to provide a theoretical basis for the treatment of CI for related diseases by ginsenosides.
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21
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Normal and Pathological NRF2 Signalling in the Central Nervous System. Antioxidants (Basel) 2022; 11:antiox11081426. [PMID: 35892629 PMCID: PMC9394413 DOI: 10.3390/antiox11081426] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/18/2022] [Accepted: 07/19/2022] [Indexed: 11/17/2022] Open
Abstract
The nuclear factor erythroid 2-related factor 2 (NRF2) was originally described as a master regulator of antioxidant cellular response, but in the time since, numerous important biological functions linked to cell survival, cellular detoxification, metabolism, autophagy, proteostasis, inflammation, immunity, and differentiation have been attributed to this pleiotropic transcription factor that regulates hundreds of genes. After 40 years of in-depth research and key discoveries, NRF2 is now at the center of a vast regulatory network, revealing NRF2 signalling as increasingly complex. It is widely recognized that reactive oxygen species (ROS) play a key role in human physiological and pathological processes such as ageing, obesity, diabetes, cancer, and neurodegenerative diseases. The high oxygen consumption associated with high levels of free iron and oxidizable unsaturated lipids make the brain particularly vulnerable to oxidative stress. A good stability of NRF2 activity is thus crucial to maintain the redox balance and therefore brain homeostasis. In this review, we have gathered recent data about the contribution of the NRF2 pathway in the healthy brain as well as during metabolic diseases, cancer, ageing, and ageing-related neurodegenerative diseases. We also discuss promising therapeutic strategies and the need for better understanding of cell-type-specific functions of NRF2 in these different fields.
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22
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Zoungrana LI, Krause-Hauch M, Wang H, Fatmi MK, Bates L, Li Z, Kulkarni P, Ren D, Li J. The Interaction of mTOR and Nrf2 in Neurogenesis and Its Implication in Neurodegenerative Diseases. Cells 2022; 11:cells11132048. [PMID: 35805130 PMCID: PMC9265429 DOI: 10.3390/cells11132048] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/23/2022] [Accepted: 06/26/2022] [Indexed: 12/24/2022] Open
Abstract
Neurogenesis occurs in the brain during embryonic development and throughout adulthood. Neurogenesis occurs in the hippocampus and under normal conditions and persists in two regions of the brain—the subgranular zone (SGZ) in the dentate gyrus of the hippocampus and the subventricular zone (SVZ) of the lateral ventricles. As the critical role in neurogenesis, the neural stem cells have the capacity to differentiate into various cells and to self-renew. This process is controlled through different methods. The mammalian target of rapamycin (mTOR) controls cellular growth, cell proliferation, apoptosis, and autophagy. The transcription factor Nrf2 (nuclear factor erythroid 2-related factor 2) is a major regulator of metabolism, protein quality control, and antioxidative defense, and is linked to neurogenesis. However, dysregulation in neurogenesis, mTOR, and Nrf2 activity have all been associated with neurodegenerative diseases such as Alzheimer’s, Huntington’s, and Parkinson’s. Understanding the role of these complexes in both neurogenesis and neurodegenerative disease could be necessary to develop future therapies. Here, we review both mTOR and Nrf2 complexes, their crosstalk and role in neurogenesis, and their implication in neurodegenerative diseases.
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Affiliation(s)
- Linda Ines Zoungrana
- Department of Surgery, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA; (L.I.Z.); (M.K.-H.); (H.W.); (M.K.F.); (L.B.); (D.R.)
| | - Meredith Krause-Hauch
- Department of Surgery, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA; (L.I.Z.); (M.K.-H.); (H.W.); (M.K.F.); (L.B.); (D.R.)
| | - Hao Wang
- Department of Surgery, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA; (L.I.Z.); (M.K.-H.); (H.W.); (M.K.F.); (L.B.); (D.R.)
| | - Mohammad Kasim Fatmi
- Department of Surgery, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA; (L.I.Z.); (M.K.-H.); (H.W.); (M.K.F.); (L.B.); (D.R.)
| | - Lauryn Bates
- Department of Surgery, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA; (L.I.Z.); (M.K.-H.); (H.W.); (M.K.F.); (L.B.); (D.R.)
| | - Zehui Li
- Department of Medical Engineering, College of Engineering and Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA; (Z.L.); (P.K.)
| | - Parth Kulkarni
- Department of Medical Engineering, College of Engineering and Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA; (Z.L.); (P.K.)
| | - Di Ren
- Department of Surgery, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA; (L.I.Z.); (M.K.-H.); (H.W.); (M.K.F.); (L.B.); (D.R.)
| | - Ji Li
- Department of Surgery, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA; (L.I.Z.); (M.K.-H.); (H.W.); (M.K.F.); (L.B.); (D.R.)
- Correspondence: ; Tel.: +1-813-974-4917
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23
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de la Cueva M, Antequera D, Ordoñez-Gutierrez L, Wandosell F, Camins A, Carro E, Bartolome F. Amyloid-β impairs mitochondrial dynamics and autophagy in Alzheimer's disease experimental models. Sci Rep 2022; 12:10092. [PMID: 35710783 PMCID: PMC9203760 DOI: 10.1038/s41598-022-13683-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 05/26/2022] [Indexed: 12/15/2022] Open
Abstract
The most accepted hypothesis in Alzheimer's disease (AD) is the amyloid cascade which establishes that Aβ accumulation may induce the disease development. This accumulation may occur years before the clinical symptoms but it has not been elucidated if this accumulation is the cause or the consequence of AD. It is however, clear that Aβ accumulation exerts toxic effects in the cerebral cells. It is important then to investigate all possible associated events that may help to design new therapeutic strategies to defeat or ameliorate the symptoms in AD. Alterations in the mitochondrial physiology have been found in AD but it is not still clear if they could be an early event in the disease progression associated to amyloidosis or other conditions. Using APP/PS1 mice, our results support published evidence and show imbalances in the mitochondrial dynamics in the cerebral cortex and hippocampus of these mice representing very early events in the disease progression. We demonstrate in cellular models that these imbalances are consequence of Aβ accumulation that ultimately induce increased mitophagy, a mechanism which selectively removes damaged mitochondria by autophagy. Along with increased mitophagy, we also found that Aβ independently increases autophagy in APP/PS1 mice. Therefore, mitochondrial dysfunction could be an early feature in AD, associated with amyloid overload.
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Affiliation(s)
- Macarena de la Cueva
- Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain
- Group of Neurodegenerative Diseases, Hospital Universitario 12 de Octubre Research Institute (imas12), 28041, Madrid, Spain
| | - Desiree Antequera
- Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain
- Group of Neurodegenerative Diseases, Hospital Universitario 12 de Octubre Research Institute (imas12), 28041, Madrid, Spain
| | - Lara Ordoñez-Gutierrez
- Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain
- Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Francisco Wandosell
- Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain
- Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Antonio Camins
- Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain
- Department of Pharmacology, Toxicology and Therapeutic Chemistry, Faculty of Pharmacy & Food Sciences, University of Barcelona, Barcelona, Spain
- Institut de Neurociències (UBNeuro), University of Barcelona, Barcelona, Spain
| | - Eva Carro
- Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain.
- Group of Neurodegenerative Diseases, Hospital Universitario 12 de Octubre Research Institute (imas12), 28041, Madrid, Spain.
| | - Fernando Bartolome
- Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain.
- Group of Neurodegenerative Diseases, Hospital Universitario 12 de Octubre Research Institute (imas12), 28041, Madrid, Spain.
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Suzen S, Tucci P, Profumo E, Buttari B, Saso L. A Pivotal Role of Nrf2 in Neurodegenerative Disorders: A New Way for Therapeutic Strategies. Pharmaceuticals (Basel) 2022; 15:ph15060692. [PMID: 35745610 PMCID: PMC9227112 DOI: 10.3390/ph15060692] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 05/22/2022] [Accepted: 05/28/2022] [Indexed: 02/04/2023] Open
Abstract
Clinical and preclinical research indicates that neurodegenerative diseases are characterized by excess levels of oxidative stress (OS) biomarkers and by lower levels of antioxidant protection in the brain and peripheral tissues. Dysregulations in the oxidant/antioxidant balance are known to be a major factor in the pathogenesis of neurodegenerative diseases and involve mitochondrial dysfunction, protein misfolding, and neuroinflammation, all events that lead to the proteostatic collapse of neuronal cells and their loss. Nuclear factor-E2-related factor 2 (Nrf2) is a short-lived protein that works as a transcription factor and is related to the expression of many cytoprotective genes involved in xenobiotic metabolism and antioxidant responses. A major emerging function of Nrf2 from studies over the past decade is its role in resistance to OS. Nrf2 is a key regulator of OS defense and research supports a protective and defending role of Nrf2 against neurodegenerative conditions. This review describes the influence of Nrf2 on OS and in what way Nrf2 regulates antioxidant defense for neurodegenerative conditions. Furthermore, we evaluate recent research and evidence for a beneficial and potential role of specific Nrf2 activator compounds as therapeutic agents.
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Affiliation(s)
- Sibel Suzen
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University, Tandogan, 06100 Ankara, Turkey
- Correspondence: ; Tel.: +90-533-391-5844
| | - Paolo Tucci
- Department of Clinical and Experimental Medicine, University of Foggia, Via Napoli, 20, 71122 Foggia, Italy;
| | - Elisabetta Profumo
- Department of Cardiovascular and Endocrine-Metabolic Diseases and Aging, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy; (E.P.); (B.B.)
| | - Brigitta Buttari
- Department of Cardiovascular and Endocrine-Metabolic Diseases and Aging, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy; (E.P.); (B.B.)
| | - Luciano Saso
- Department of Physiology and Pharmacology ‘‘Vittorio Erspamer”, Sapienza University of Rome, P. le Aldo Moro 5, 00185 Rome, Italy;
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25
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Neuroprotective Effects and Therapeutic Potential of the Citrus Flavonoid Hesperetin in Neurodegenerative Diseases. Nutrients 2022; 14:nu14112228. [PMID: 35684025 PMCID: PMC9183194 DOI: 10.3390/nu14112228] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/19/2022] [Accepted: 05/23/2022] [Indexed: 12/13/2022] Open
Abstract
Neurodegenerative disorders affect more than fifty million Americans each year and represent serious health threats as the population ages. Neuroinflammation and oxidative stress are critical in the onset, progression, and pathogenesis of neurodegenerative diseases such as Alzheimer’s (AD), Parkinson’s (PD), and amyotrophic lateral sclerosis (ALS). A wide range of natural compounds has been investigated because of their antioxidant, anti-inflammatory, and neuroprotective properties. The citrus flavonoid hesperetin (HPT), an aglycone of hesperidin found in oranges, mandarins, and lemons, has been extensively reported to exert neuroprotective effects in experimental models of neurogenerative diseases. This review has compiled multiple studies on HPT in both in vivo and in vitro models to study neurodegeneration. We focused on the modulatory effects of hesperetin on the release of cellular anti-inflammatory and antioxidative stress mediators. Additionally, this review discusses the hesperetin effect in maintaining the levels of microRNA (miRNA) and modulating autophagy as it relates to hesperetin’s protective mechanisms against neurodegeneration. Moreover, this review is focused on providing experimental data for hesperetin’s potential as a neuroprotective compound and discusses reported evidence that HPT crosses the blood–brain barrier. In summary, this review shows the evidence available in the literature to indicate the efficacy of hesperetin in delaying the onset of neurodegenerative diseases.
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26
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Saha S, Buttari B, Profumo E, Tucci P, Saso L. A Perspective on Nrf2 Signaling Pathway for Neuroinflammation: A Potential Therapeutic Target in Alzheimer's and Parkinson's Diseases. Front Cell Neurosci 2022; 15:787258. [PMID: 35126058 PMCID: PMC8813964 DOI: 10.3389/fncel.2021.787258] [Citation(s) in RCA: 53] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 12/13/2021] [Indexed: 12/13/2022] Open
Abstract
Neuroinflammation plays a pivotal role in Alzheimer's disease (AD) and Parkinson's disease (PD), the leading causes of dementia. These neurological disorders are characterized by the accumulation of misfolded proteins such as amyloid-ß (Aß), tau protein and α-synuclein, contributing to mitochondrial fragmentation, oxidative stress, and neuroinflammation. Misfolded proteins activate microglia, which induces neuroinflammation, expression of pro-inflammatory cytokines and subsequently facilitates synaptic damage and neuronal loss. So far, all the proposed drugs were based on the inhibition of protein aggregation and were failed in clinical trials. Therefore, the treatment options of dementia are still a challenging issue. Thus, it is worthwhile to study alternative therapeutic strategies. In this context, there is increasing data on the pivotal role of transcription factor NF- E2 p45-related factor 2 (Nrf2) on the redox homeostasis and anti-inflammatory functions in neurodegenerative disorders. Interestingly, Nrf2 signaling pathway has shown upregulation of antioxidant genes, inhibition of microglia-mediated inflammation, and improved mitochondrial function in neurodegenerative diseases, suggesting Nrf2 activation could be a novel therapeutic approach to target pathogenesis. The present review will examine the correlation between Nrf2 signaling with neuroinflammation in AD and PD.
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Affiliation(s)
- Sarmistha Saha
- Department of Cardiovascular, Endocrine-Metabolic Diseases and Aging, Italian National Institute of Health, Rome, Italy
| | - Brigitta Buttari
- Department of Cardiovascular, Endocrine-Metabolic Diseases and Aging, Italian National Institute of Health, Rome, Italy
| | - Elisabetta Profumo
- Department of Cardiovascular, Endocrine-Metabolic Diseases and Aging, Italian National Institute of Health, Rome, Italy
| | - Paolo Tucci
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Luciano Saso
- Department of Physiology and Pharmacology “Vittorio Erspamer”, Sapienza University of Rome, Rome, Italy
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27
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Meng Y, Feng R, Yang Z, Liu T, Huo T, Jiang H. Oxidative stress induced by realgar in neurons: p38 MAPK and ERK1/2 perturb autophagy and induce the p62-Keap1-Nrf2 feedback loop to activate the Nrf2 signalling pathway. JOURNAL OF ETHNOPHARMACOLOGY 2022; 282:114582. [PMID: 34492322 DOI: 10.1016/j.jep.2021.114582] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/13/2021] [Accepted: 08/27/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Due to the modernization of traditional Chinese medicine (TCM) and the influence of traditional medication habits (TCM has no toxicity or side effects), arsenic poisoning incidents caused by the abuse of realgar and realgar-containing Chinese patent medicines have occurred occasionally. However, the potential mechanism of central nervous system toxicity of realgar remains unclear. AIM OF THE STUDY This study aimed to clarify the specific mechanism of realgar-induced neurotoxicity. MATERIALS AND METHODS In this study, the roles of ERK1/2 and p38 MAPK in realgar-induced neuronal autophagy and overactivation of the nuclear factor erythroid-derived factor 2-related factor (Nrf2) signalling pathways was investigated in vivo and in vitro. RESULTS The arsenic in realgar passed through the blood-brain barrier and accumulated in the brain, resulting in damage to neurons, synapses and myelin sheaths in the cerebral cortex and a decrease in the total antioxidant capacity. The specific mechanism is that the excessive activation of Nrf2 is regulated by the upstream signalling molecules ERK1/2 and p38MAPK. At the same time, p38 MAPK and ERK1/2 interfere with autophagy, thereby promoting autophagy initiation but causing subsequent dysfunctional autophagic degradation and inducing the p62-Keap1-Nrf2 feedback loop to promote Nrf2 signalling pathway activation and nerve cell apoptosis. CONCLUSIONS This study confirmed the role of the signalling molecules p38 MAPK and ERK1/2 in perturbing autophagy and inducing the p62-Keap1-Nrf2 feedback loop to activate the Nrf2 signalling pathway in realgar-induced neurotoxicity.
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Affiliation(s)
- Yuan Meng
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Rui Feng
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Zhao Yang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Tingting Liu
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Taoguang Huo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Hong Jiang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China; The Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, Shenyang, Liaoning, People's Republic of China.
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Saikosaponin-D Mitigates Oxidation in SH-SY5Y Cells Stimulated by Glutamate Through Activation of Nrf2 Pathway: Involvement of PI3K. Neurotox Res 2022; 40:230-240. [PMID: 34994954 DOI: 10.1007/s12640-021-00438-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/08/2021] [Accepted: 10/29/2021] [Indexed: 01/04/2023]
Abstract
Alzheimer's disease (AD) is a typical neurodegenerative disease. Well-established studies have shown an elevated level of ROS (reactive oxygen species) that induces oxidative stress in AD. Saikosaponin-D exhibited significant therapeutic effects on neurodegenerative diseases. However, its in-depth molecular mechanisms against neurotoxicity remain not fully uncovered. Herein, the possible protective effects of saikosaponin-D on glutamate-induced neurotoxicity in SH-SY5Y cells and the underlying mechanism were elucidated. Saikosaponin-D pretreatment could ameliorate glutamate-induced cytotoxicity according to MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay and depress apoptosis according to Hoechst 33,342 staining and Annexin V-FITC/PI double staining in SH-SY5Y cells. Additionally, saikosaponin-D administration suppressed oxidative stress in response to glutamate indicated by diminished intracellular ROS formation and reduced MDA (malondialdehyde) content in SH-SY5Y cells. These phenomena, appeared to correlate with the recovered cellular antioxidant enzyme activities and inducted HO-1 (heme oxygenase-1) expression accompanying the nuclear translocation of Nrf2 conduct by saikosaponin-D preconditioning which had been altered by glutamate, were correlated with its neuroprotective. Furthermore, addition of LY294002, a selective inhibitor of PI3K (phosphatidylinositol 3 kinase), blocked saikosaponin-D-caused Nrf2 nuclear translocation and reversed the protection of saikosaponin-D against glutamate in SH-SY5Y cells. Moreover, saikosaponin-D exhibited antioxidant potential with high free radical-scavenging activity as confirmed by a DPPH (2,2-diphenyl-1-picrylhydrazyl) and TEAC (Trolox equivalent antioxidant capacity) in a cell-free system in vitro. Taken together, our results indicated that saikosaponin-D enhanced cellular antioxidant capacity through not only intrinsic free radical-scavenging activity but also induction of endogenous antioxidant enzyme activities and HO-1 expression mediated, at least in part, by activating PI3K and subsequently Nrf2 nuclear translocation, thereby protecting the SH-SY5Y cells from glutamate-induced oxidative cytotoxicity. In concert, these data raise the possibility that saikosaponin-D may be an attractive candidate for prevention and treatment of AD and other diseases related to oxidation in the future.
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Ren J, Zhang S, Wang X, Deng Y, Zhao Y, Xiao Y, Liu J, Chu L, Qi X. MEF2C ameliorates learning, memory, and molecular pathological changes in Alzheimer’s disease in vivo and in vitro. Acta Biochim Biophys Sin (Shanghai) 2021; 54:77-90. [PMID: 35130621 PMCID: PMC9909301 DOI: 10.3724/abbs.2021012] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Myocyte enhancer factor 2C (MEF2C) is highly expressed in the nervous system, and regulates neuro-development, synaptic plasticity, and inflammation. However, its mechanism in Alzheimer's disease (AD) is underestimated. In this study, the role and mechanism of MEF2C were investigated in the brain tissue specimens from patients with AD, APPswe/PSEN1dE9 double transgenic (APP/PS1_DT) mice, and SH-SY5Y cells treated with β-amyloid peptide (Aβ). The results indicated that the expression of MEF2C is significantly reduced, and the expression of MEF2C/Aβ in different parts of brain is negatively correlated in patients with AD. Knockdown of MEF2C promotes cell apoptosis and the level of β-amyloid precursor protein cleaving enzyme 1 (BACE) but reduces BACE2 expression. In addition, knockdown of enhances the generation and aggregation of Aβ in the cortex of APP/PS1_DT mice, reduces the expression of synaptic proteins, exacerbates the ability of learning and memory of APP/PS1_DT mice, damages the structure of mitochondria, increases the oxidative stress (OS) level, and inhibits the expression levels of members of the Nrf2-ARE signal pathway. In summary, inhibition of MEF2C exacerbates the toxic effect of Aβ and , damages synaptic plasticity, reduces the ability of learning and memory of APP/PS1 mice, and increases the level of OS via the Nrf2-ARE signal pathway.
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Affiliation(s)
- Jiamou Ren
- Key Laboratory of Endemic and Ethnic DiseasesMinistry of Education & Key Laboratory of Medical Molecular Biology of Guizhou ProvinceGuizhou Medical UniversityGuiyang550004China,Department of Laboratory Medicinethe 4th People′s Hospital of GuiyangGuiyang550004China
| | - Shuli Zhang
- Chinese People′s Liberation ArmySecret Service Center Sanatorium of XiamenXiamen361000China
| | - Xiaoling Wang
- Key Laboratory of Endemic and Ethnic DiseasesMinistry of Education & Key Laboratory of Medical Molecular Biology of Guizhou ProvinceGuizhou Medical UniversityGuiyang550004China
| | - Yuxin Deng
- Key Laboratory of Endemic and Ethnic DiseasesMinistry of Education & Key Laboratory of Medical Molecular Biology of Guizhou ProvinceGuizhou Medical UniversityGuiyang550004China
| | - Yi Zhao
- Key Laboratory of Endemic and Ethnic DiseasesMinistry of Education & Key Laboratory of Medical Molecular Biology of Guizhou ProvinceGuizhou Medical UniversityGuiyang550004China
| | - Yan Xiao
- Key Laboratory of Endemic and Ethnic DiseasesMinistry of Education & Key Laboratory of Medical Molecular Biology of Guizhou ProvinceGuizhou Medical UniversityGuiyang550004China
| | - Jian Liu
- Department of NeurosurgeryAffiliated Hospital of Guizhou Medical UniversityGuiyang550004China
| | - Liangzhao Chu
- Department of NeurosurgeryAffiliated Hospital of Guizhou Medical UniversityGuiyang550004China,Correspondence address. Tel: +86-851-86752814; E-mail: (X.Q.) / E-mail: (L.C.)@qq.com
| | - Xiaolan Qi
- Key Laboratory of Endemic and Ethnic DiseasesMinistry of Education & Key Laboratory of Medical Molecular Biology of Guizhou ProvinceGuizhou Medical UniversityGuiyang550004China,Translational Medicine Research CenterGuizhou Medical UniversityGuiyang550004China,Correspondence address. Tel: +86-851-86752814; E-mail: (X.Q.) / E-mail: (L.C.)@qq.com
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30
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Posttranscriptional regulation of Nrf2 through miRNAs and their role in Alzheimer's disease. Pharmacol Res 2021; 175:106018. [PMID: 34863823 DOI: 10.1016/j.phrs.2021.106018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 10/27/2021] [Accepted: 11/29/2021] [Indexed: 12/18/2022]
Abstract
The nuclear factor erythroid-derived 2-related factor 2 (NFE2L2/Nrf2) is a pivotal facilitator of cytoprotective responses against the oxidative/electrophilic insults. Upon activation, Nrf2 induces transcription of a wide range of cytoprotective genes having antioxidant response element (ARE) in their promoter region. Dysfunction in Nrf2 signaling has been linked to the pathogenesis of AD and several studies have suggested that boosting Nrf2 expression/activity by genetic or pharmacological approaches is beneficial in AD. Among the diverse mechanisms that regulate the Nrf2 signaling, miRNAs-mediated regulation of Nrf2 has gained much attention in recent years. Several miRNAs have been reported to directly repress the post-transcriptional expression of Nrf2 and thereby negatively regulate the Nrf2-dependent cellular cytoprotective response in AD. Moreover, several Nrf2 targeting miRNAs are misregulated in AD brains. This review is focused on the role of misregulated miRNAs that directly target Nrf2, in AD pathophysiology. Here, alongside a general description of functional interactions between miRNAs and Nrf2, we have reviewed the evidence indicating the possible role of these miRNAs in AD pathogenesis.
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31
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The KEAP1-NRF2 System in Healthy Aging and Longevity. Antioxidants (Basel) 2021; 10:antiox10121929. [PMID: 34943032 PMCID: PMC8750203 DOI: 10.3390/antiox10121929] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/29/2021] [Accepted: 11/29/2021] [Indexed: 12/25/2022] Open
Abstract
Aging is inevitable, but the inherently and genetically programmed aging process is markedly influenced by environmental factors. All organisms are constantly exposed to various stresses, either exogenous or endogenous, throughout their lives, and the quality and quantity of the stresses generate diverse impacts on the organismal aging process. In the current oxygenic atmosphere on earth, oxidative stress caused by reactive oxygen species is one of the most common and critical environmental factors for life. The Kelch-like ECH-associated protein 1-NFE2-related factor 2 (KEAP1-NRF2) system is a critical defense mechanism of cells and organisms in response to redox perturbations. In the presence of oxidative and electrophilic insults, the thiol moieties of cysteine in KEAP1 are modified, and consequently NRF2 activates its target genes for detoxification and cytoprotection. A number of studies have clarified the contributions of the KEAP1-NRF2 system to the prevention and attenuation of physiological aging and aging-related diseases. Accumulating knowledge to control stress-induced damage may provide a clue for extending healthspan and treating aging-related diseases. In this review, we focus on the relationships between oxidative stress and aging-related alterations in the sensory, glandular, muscular, and central nervous systems and the roles of the KEAP1-NRF2 system in aging processes.
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Cuadrado A. Brain-Protective Mechanisms of Transcription Factor NRF2: Toward a Common Strategy for Neurodegenerative Diseases. Annu Rev Pharmacol Toxicol 2021; 62:255-277. [PMID: 34637322 DOI: 10.1146/annurev-pharmtox-052220-103416] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Neurodegenerative diseases are characterized by the loss of homeostatic functions that control redox and energy metabolism, neuroinflammation, and proteostasis. The transcription factor nuclear factor erythroid 2-related factor 2 (NRF2) is a master controller of these functions, and its overall activity is compromised during aging and in these diseases. However, NRF2 can be activated pharmacologically and is now being considered a common therapeutic target. Many gaps still exist in our knowledge of the specific role that NRF2 plays in specialized brain cell functions or how these cells respond to the hallmarks of these diseases. This review discusses the relevance of NRF2 to several hallmark features of neurodegenerative diseases and the current status of pharmacological activators that might pass through the blood-brain barrier and provide a disease-modifying effect. Expected final online publication date for the Annual Review of Pharmacology and Toxicology, Volume 62 is January 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Antonio Cuadrado
- Department of Biochemistry, Medical College, Autonomous University of Madrid, Madrid 28049, Spain.,Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), Madrid 28029, Spain.,Instituto de Investigación Sanitaria La Paz (IdiPaz), Madrid 28046, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Madrid 28031, Spain;
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33
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Siddiqui A, Shah Z, Jahan RN, Othman I, Kumari Y. Mechanistic role of boswellic acids in Alzheimer's disease: Emphasis on anti-inflammatory properties. Biomed Pharmacother 2021; 144:112250. [PMID: 34607104 DOI: 10.1016/j.biopha.2021.112250] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 09/17/2021] [Accepted: 09/26/2021] [Indexed: 12/24/2022] Open
Abstract
The resin/gum of Boswellia species belonging to the family of Burseraceae is a naturally occurring mixture of bioactive compounds, which was traditionally used as a folk medicine to treat conditions like chronic inflammation. Several research studies have also explored its' therapeutic potential against multiple neurodegenerative diseases such as Alzheimer's disease (AD). The main chemical constituents of this gum include boswellic acids (BAs) like 3-O-acetyl-11-keto-β boswellic acid (AKBA) that possess potent anti-inflammatory and neuroprotective properties in AD. It is also involved in inhibiting the acetylcholinesterase (AChE) activity in the cholinergic pathway and improve choline levels as well as its binding with nicotinic receptors to produce anti-inflammatory effects. Multiple shreds of evidence have demonstrated that BAs modulate key molecular targets and signalling pathways like 5-lipoxygenase/cyclooxygenase, Nrf2, NF-kB, cholinergic, amyloid-beta (Aβ), and neurofibrillary tangles formation (NFTs) that are involved in AD progression. The present review focuses on the possible mechanistic therapeutic role of BAs in modulating the 5-LOX/COX pathway in arachidonic acid metabolism, activating Nrf2 through binding of ARE, inhibiting NF-kB and AChE activity. In addition, an inhibition of amyloid plaques (Aβ) and neurofibrillary tangles (NFTs) induced neurotoxicity and neuroinflammation in AD by BAs is also discussed in this review. We have also highlighted that BAs possess beneficial effects in AD by targeting multiple molecular pathways and makes it an emerging drug candidate for treating neurodegenerative diseases.
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Affiliation(s)
- Aisha Siddiqui
- Neurological disorder and aging research group (NDA), Microbiome and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, 47500, Selangor, Malaysia
| | - Zahoor Shah
- Department of Medicinal and Biological Chemistry, University of Toledo, 3000 Arlington Avenue, Toledo 43614, OH, USA
| | - Rao Nargis Jahan
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard University, New Delhi 110062, India
| | - Iekhsan Othman
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, 47500 Selangor, Malaysia
| | - Yatinesh Kumari
- Neurological disorder and aging research group (NDA), Microbiome and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, 47500, Selangor, Malaysia.
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34
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He L, Sun Y. The potential role of Keap1-Nrf2 pathway in the pathogenesis of Alzheimer's disease, type 2 diabetes, and type 2 diabetes-related Alzheimer's disease. Metab Brain Dis 2021; 36:1469-1479. [PMID: 34129198 DOI: 10.1007/s11011-021-00762-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 06/06/2021] [Indexed: 12/30/2022]
Abstract
Kelch-like ECH associated-protein 1 (Keap1)-nuclear factor erythroid 2-related factor 2 (Nrf2) signaling pathway is thought to be the key regulatory process defensing oxidative stress in multiple organs. Type 2 diabetes mellitus (T2DM) and Alzheimer's disease (AD) are both serious global health problems with high prevalence. A growing number of literatures have suggested a possible link between Keap1-Nrf2 signaling pathway and the pathological changes of T2DM, AD as well as T2DM-related AD. The current review mainly discusses how the damaged Keap1-Nrf2 signaling pathway leads to dysregulated redox molecular signaling, which may contribute to the pathogenesis of AD and T2DM-related cognitive dysfunction, as well as some compounds targeting this pathway. The further exploration of the mechanisms of this pathway could provide novel therapeutic strategies to improve cognitive function, through restoration of expression or translocation of Nrf2 and scavenging excessive free radicals.
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Affiliation(s)
- Ling He
- Department of Pharmacology, School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, China
| | - Yi Sun
- Department of Pharmacology, School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, China.
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35
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Chen K, Jiang X, Wu M, Cao X, Bao W, Zhu LQ. Ferroptosis, a Potential Therapeutic Target in Alzheimer's Disease. Front Cell Dev Biol 2021; 9:704298. [PMID: 34422824 PMCID: PMC8374166 DOI: 10.3389/fcell.2021.704298] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 07/09/2021] [Indexed: 12/11/2022] Open
Abstract
Cell death is a common phenomenon in the progression of Alzheimer’s disease (AD). However, the mechanism of triggering the death of neuronal cells remains unclear. Ferroptosis is an iron-dependent lipid peroxidation-driven cell death and emerging evidences have demonstrated the involvement of ferroptosis in the pathological process of AD. Moreover, several hallmarks of AD pathogenesis were consistent with the characteristics of ferroptosis, such as excess iron accumulation, elevated lipid peroxides, and reactive oxygen species (ROS), reduced glutathione (GSH), and glutathione peroxidase 4 (GPX4) levels. Besides, some ferroptosis inhibitors can relieve AD-related pathological symptoms in AD mice and exhibit potential clinical benefits in AD patients. Therefore, ferroptosis is gradually being considered as a distinct cell death mechanism in the pathogenesis of AD. However, direct evidence is still lacking. In this review, we summarize the features of ferroptosis in AD, its underlying mechanisms in AD pathology, and review the application of ferroptosis inhibitors in both AD clinical trials and mice/cell models, to provide valuable information for future treatment and prevention of this devastating disease.
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Affiliation(s)
- Kai Chen
- Key Lab of Neurological Disorder of Education Ministry, Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Neurosurgery, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaobing Jiang
- Department of Neurosurgery, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Moxin Wu
- Department of Jiujiang Clinical Research Center for Precision Medicine, Affiliated Hospital of Jiujiang University, Jiujiang, China
| | - Xianming Cao
- Department of Jiujiang Clinical Research Center for Precision Medicine, Affiliated Hospital of Jiujiang University, Jiujiang, China
| | - Wendai Bao
- Key Lab of Neurological Disorder of Education Ministry, Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,College of Biomedicine and Health, Huazhong Agricultural University, Wuhan, China
| | - Ling-Qiang Zhu
- Key Lab of Neurological Disorder of Education Ministry, Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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36
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Varshney V, Garabadu D. Ang(1-7) exerts Nrf2-mediated neuroprotection against amyloid beta-induced cognitive deficits in rodents. Mol Biol Rep 2021; 48:4319-4331. [PMID: 34075536 DOI: 10.1007/s11033-021-06447-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 05/27/2021] [Indexed: 02/06/2023]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder with cognitive deficits in an individual. Ang(1-7) exhibits neuroprotection against amyloid beta (Aβ)-induced mitochondrial dysfunction and neurotoxicity in experimental conditions. Further, Ang(1-7) also exhibits nrf2-mediated antioxidant activity in experimental conditions. However, its therapeutic role on nrf2-mediated mitochondrial function is yet to be established in the Aβ-induced neurotoxicity. The experimental dementia was induced in the male rats by intracerebroventricular administration of Aβ(1-42) on day-1 (D-1) of the experimental schedule of 14 days. Ang(1-7) was administered once daily from D-1 toD-14 to the Aβ-challenged rodents. Ang(1-7) attenuated Aβ-induced increase in escape latency and decrease in the time spent in the target quadrant during Morris water maze and percentage of spontaneous alteration behavior during Y-maze tests in the rats. Further, Ang(1-7) attenuated Aβ-induced cholinergic dysfunction in terms of decrease in the level of acetylcholine and activity of choline acetyltransferase, and increase in the activity of acetylcholinesterase, and increase in the level of Aβ in rat hippocampus, pre-frontal cortex and amygdala. Furthermore, Ang(1-7) reversed Aβ-induced decrease in the mitochondrial function, integrity and bioenergetics in all brain regions. Additionally, Ang(1-7) attenuated Aβ-induced increase in the extent of apoptosis and decrease in the level of heme oxygenase-1 in all selected brain regions. Trigonelline significantly abolished the therapeutic effectiveness of Ang(1-7) on Aβ-induced alterations in the behavioral, neurochemicals and molecular observations in the animals. Ang(1-7) may exhibit nrf2-mediated neuroprotection in these rodents. Hence, Ang(1-7) could be a potential therapeutic option in the pharmacotherapy of AD.
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Affiliation(s)
- Vibhav Varshney
- Division of Pharmacology, Institute of Pharmaceutical Research, GLA University, Mathura, 281406, India
| | - Debapriya Garabadu
- Division of Pharmacology, Institute of Pharmaceutical Research, GLA University, Mathura, 281406, India.
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37
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Prasanth MI, Malar DS, Tencomnao T, Brimson JM. The emerging role of the sigma-1 receptor in autophagy: hand-in-hand targets for the treatment of Alzheimer's. Expert Opin Ther Targets 2021; 25:401-414. [PMID: 34110944 DOI: 10.1080/14728222.2021.1939681] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 06/03/2021] [Indexed: 01/18/2023]
Abstract
INTRODUCTION Autophagy is a cellular catabolic mechanism that helps clear damaged cellular components and is essential for normal cellular and tissue function. The sigma-1 receptor (σ-1R) is a chaperone protein involved in signal transduction, neurite outgrowth, and plasticity, improving memory, and neuroprotection. Recent evidence shows that σ-1R can promote autophagy. Autophagy activation by the σ-1Rs along with other neuroprotective effects makes it an interesting target for the treatment of Alzheimer's disease. AF710B, T-817 MA, and ANAVEX2-73 are some of the σ-1R agonists which have shown promising results and have entered clinical trials. These molecules have also been found to induce autophagy and show cytoprotective effects in cellular models. AREAS COVERED This review provides insight into the current understanding of σ-1R functions related to autophagy and their role in alleviating AD. EXPERT OPINION We propose a mechanism through which the activation of σ-1R and autophagy could alter amyloid precursor protein processing to inhibit amyloid-β production by reconstituting cholesterol and gangliosides in the lipid raft to offer neuroprotection against AD. Future AD treatment could involve the combined targeting of the σ-1R and autophagy activation. We suggest that future studies investigate the link between autophagy the σ-1R and AD.
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Affiliation(s)
- Mani Iyer Prasanth
- Natural Products for Neuroprotection and Anti-ageing Research Unit, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand
- Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Dicson Sheeja Malar
- Natural Products for Neuroprotection and Anti-ageing Research Unit, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand
- Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Tewin Tencomnao
- Natural Products for Neuroprotection and Anti-ageing Research Unit, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand
- Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand
| | - James Michael Brimson
- Natural Products for Neuroprotection and Anti-ageing Research Unit, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand
- Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand
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Brewer GJ, Herrera RA, Philipp S, Sosna J, Reyes-Ruiz JM, Glabe CG. Age-Related Intraneuronal Aggregation of Amyloid-β in Endosomes, Mitochondria, Autophagosomes, and Lysosomes. J Alzheimers Dis 2021; 73:229-246. [PMID: 31771065 PMCID: PMC7029321 DOI: 10.3233/jad-190835] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This work provides new insight into the age-related basis of Alzheimer’s disease (AD), the composition of intraneuronal amyloid (iAβ), and the mechanism of an age-related increase in iAβ in adult AD-model mouse neurons. A new end-specific antibody for Aβ45 and another for aggregated forms of Aβ provide new insight into the composition of iAβ and the mechanism of accumulation in old adult neurons from the 3xTg-AD model mouse. iAβ levels containing aggregates of Aβ45 increased 30-50-fold in neurons from young to old age and were further stimulated upon glutamate treatment. iAβ was 8 times more abundant in 3xTg-AD than non-transgenic neurons with imaged particle sizes following the same log-log distribution, suggesting a similar snow-ball mechanism of intracellular biogenesis. Pathologically misfolded and mislocalized Alz50 tau colocalized with iAβ and rapidly increased following a brief metabolic stress with glutamate. AβPP-CTF, Aβ45, and aggregated Aβ colocalized most strongly with mitochondria and endosomes and less with lysosomes and autophagosomes. Differences in iAβ by sex were minor. These results suggest that incomplete carboxyl-terminal trimming of long Aβs by gamma-secretase produced large intracellular deposits which limited completion of autophagy in aged neurons. Understanding the mechanism of age-related changes in iAβ processing may lead to application of countermeasures to prolong dementia-free health span.
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Affiliation(s)
- Gregory J Brewer
- MIND Institute, Center for Neurobiology of Learning and Memory, Irvine, CA, USA.,Department of Biomedical Engineering, University of California Irvine, Irvine, CA, USA
| | - Robert A Herrera
- Department of Biomedical Engineering, University of California Irvine, Irvine, CA, USA
| | - Stephan Philipp
- Department of Molecular Biology, University of California Irvine, Irvine, CA, USA
| | - Justyna Sosna
- Department of Molecular Biology, University of California Irvine, Irvine, CA, USA
| | | | - Charles G Glabe
- MIND Institute, Center for Neurobiology of Learning and Memory, Irvine, CA, USA.,Department of Molecular Biology, University of California Irvine, Irvine, CA, USA
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Mechanistic interplay of various mediators involved in mediating the neuroprotective effect of daphnetin. Pharmacol Rep 2021; 73:1220-1229. [PMID: 33860917 DOI: 10.1007/s43440-021-00261-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 03/11/2021] [Accepted: 04/02/2021] [Indexed: 12/20/2022]
Abstract
Daphnetin is a 7, 8 dihydroxy coumarin isolated from different medicinal plants of the Thymelaeaceae family and exhibits copious pharmacological activities including neuroprotection, anti-cancer, anti-malarial, anti-inflammatory, anti-parasitic and anti-arthritic activity. It has been proved to be an effective neuroprotective agent in several preclinical animal studies and cell line examinations. It is found to interact with different cellular mediators and signaling pathways to confer protection against neurodegeneration. The reactive oxygen species and inflammatory mediators are the major culprits of different neurodegenerative diseases. Oxidative stress activates the pro-apoptotic proteins and inhibits anti-apoptotic proteins, leading to neuronal cell death. Daphnetin restores cellular redox balance by upregulating the antioxidants level (GSH and SOD), anti-apoptotic protein (Bcl-2), as well as by reducing the levels of proinflammatory cytokines, executioner caspase-3, pro-apoptotic-Bax, and oxidative stress markers. Furthermore, activation of Nrf-2/HO-1 signaling and upregulation of HSP-70 governs the protection elicited by daphnetin against oxidative stress-induced neuronal apoptosis. Daphnetin modulated inhibition of JNK-MAPK, JAK-STAT, and TLR-4/NF-κB signaling pathways also contributed to its neuroprotective effect. The positive effects of daphnetin have been also related to its AChE, BChE, and BACE-1 inhibitory potential. The present review has been designed to explore the mechanistic interplay of various mediators in mediating the neuroprotective effects of daphnetin.
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40
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Rigby MJ, Lawton AJ, Kaur G, Banduseela VC, Kamm WE, Lakkaraju A, Denu JM, Puglielli L. Endoplasmic reticulum acetyltransferases Atase1 and Atase2 differentially regulate reticulophagy, macroautophagy and cellular acetyl-CoA metabolism. Commun Biol 2021; 4:454. [PMID: 33846551 PMCID: PMC8041774 DOI: 10.1038/s42003-021-01992-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 03/17/2021] [Indexed: 12/25/2022] Open
Abstract
Nε-lysine acetylation in the ER lumen is a recently discovered quality control mechanism that ensures proteostasis within the secretory pathway. The acetyltransferase reaction is carried out by two type-II membrane proteins, ATase1/NAT8B and ATase2/NAT8. Prior studies have shown that reducing ER acetylation can induce reticulophagy, increase ER turnover, and alleviate proteotoxic states. Here, we report the generation of Atase1-/- and Atase2-/- mice and show that these two ER-based acetyltransferases play different roles in the regulation of reticulophagy and macroautophagy. Importantly, knockout of Atase1 alone results in activation of reticulophagy and rescue of the proteotoxic state associated with Alzheimer's disease. Furthermore, loss of Atase1 or Atase2 results in widespread adaptive changes in the cell acetylome and acetyl-CoA metabolism. Overall, our study supports a divergent role of Atase1 and Atase2 in cellular biology, emphasizing ATase1 as a valid translational target for diseases characterized by toxic protein aggregation in the secretory pathway.
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Affiliation(s)
- Michael J Rigby
- Department of Medicine, University of Wisconsin-Madison, Madison, WI, USA
- Neuroscience Training Program, University of Wisconsin-Madison, Madison, WI, USA
- Waisman Center, University of Wisconsin-Madison, Madison, WI, USA
| | - Alexis J Lawton
- Department of Biomolecular Chemistry and the Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI, USA
| | - Gulpreet Kaur
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, WI, USA
| | - Varuna C Banduseela
- Department of Medicine, University of Wisconsin-Madison, Madison, WI, USA
- Department of Pharmacology, University of Michigan, Ann Arbor, MI, USA
| | - William E Kamm
- Department of Medicine, University of Wisconsin-Madison, Madison, WI, USA
- Waisman Center, University of Wisconsin-Madison, Madison, WI, USA
| | - Aparna Lakkaraju
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, WI, USA
- Department of Ophthalmology and Anatomy, University of California, San Francisco, CA, USA
| | - John M Denu
- Department of Biomolecular Chemistry and the Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI, USA
| | - Luigi Puglielli
- Department of Medicine, University of Wisconsin-Madison, Madison, WI, USA.
- Neuroscience Training Program, University of Wisconsin-Madison, Madison, WI, USA.
- Waisman Center, University of Wisconsin-Madison, Madison, WI, USA.
- Geriatric Research Education Clinical Center, Veterans Affairs Medical Center, Madison, WI, USA.
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Thioredoxin-80 protects against amyloid-beta pathology through autophagic-lysosomal pathway regulation. Mol Psychiatry 2021; 26:1410-1423. [PMID: 31520067 DOI: 10.1038/s41380-019-0521-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 07/02/2019] [Accepted: 08/02/2019] [Indexed: 12/15/2022]
Abstract
Aggregation and accumulation of amyloid beta (Aβ) are believed to play a key role in the pathogenesis of Alzheimer's disease (AD). We previously reported that Thioredoxin-80 (Trx80), a truncated form of Thioredoxin-1, prevents the toxic effects of Aβ and inhibits its aggregation in vitro. Trx80 levels were found to be dramatically reduced both in the human brain and cerebrospinal fluid of AD patients. In this study, we investigated the effect of Trx80 expression using in vivo and in vitro models of Aβ pathology. We developed Drosophila melanogaster models overexpressing either human Trx80, human Aβ42, or both Aβ42/Trx80 in the central nervous system. We found that Trx80 expression prevents Aβ42 accumulation in the brain and rescues the reduction in life span and locomotor impairments seen in Aβ42 expressing flies. Also, we show that Trx80 induces autophagosome formation and reverses the inhibition of Atg4b-Atg8a/b autophagosome formation pathway caused by Aβ42. These effects were also confirmed in human neuroblastoma cells. These results give insight into Trx80 function in vivo, suggesting its role in the autophagosome biogenesis and thus in Aβ42 degradation. Our findings put Trx80 on the spotlight as an endogenous agent against Aβ42-induced toxicity in the brain suggesting that strategies to enhance Trx80 levels in neurons could potentially be beneficial against AD pathology in humans.
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Protective Effect of Biobran/MGN-3 against Sporadic Alzheimer's Disease Mouse Model: Possible Role of Oxidative Stress and Apoptotic Pathways. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:8845064. [PMID: 33574982 PMCID: PMC7857904 DOI: 10.1155/2021/8845064] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 12/14/2020] [Accepted: 01/03/2021] [Indexed: 12/29/2022]
Abstract
Alzheimer's disease (AD) is a debilitating and irreversible brain disease that affects an increasing number of aged individuals, mandating the development of protective nutraceuticals. Biobran/MGN-3, an arabinoxylan from rice bran, has potent antioxidant, antiaging, and immunomodulatory effects. The aim of the present study was to investigate the protective effect of Biobran against sporadic Alzheimer's disease (SAD). SAD was induced in mice via intracerebroventricular injection of streptozotocin (STZ) (3 mg/kg). STZ-treated mice were administered with Biobran for 21 days. The effects of Biobran on memory and learning were measured via the Morris water maze, novel object recognition, and Y-maze tests. Biomarkers for apoptosis, oxidative stress, and amyloidogenesis were measured using ELISA and western blot analysis. Histopathological examination was performed to confirm neuronal damage and amyloid-beta deposition. Biobran reversed the spatial memory deficit in SAD-induced mice, and it increased the expression of glutathione, reduced malondialdehyde, decreased IL-6, decreased intercellular adhesion molecule-1 (ICAM-1), and significantly increased nuclear factor erythroid 2-related factor 2 (Nrf2) and antioxidant response element (ARE). Moreover, Biobran exerted a protective effect against amyloid-beta-induced apoptosis via the suppression of both cleaved caspase-3 and the proapoptotic protein Bax and via the upregulation of the antiapoptotic protein Bcl-2. Furthermore, it reduced the expression of forkhead box class O proteins. It could be concluded from this study that Biobran may be a useful nutritional antioxidant agent for protection against SAD through its activation of the gene expression of Nrf2/ARE, which in turn modulates the apoptotic and amyloidogenic pathways.
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Zhang W, Feng C, Jiang H. Novel target for treating Alzheimer's Diseases: Crosstalk between the Nrf2 pathway and autophagy. Ageing Res Rev 2021; 65:101207. [PMID: 33144123 DOI: 10.1016/j.arr.2020.101207] [Citation(s) in RCA: 85] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 10/02/2020] [Accepted: 10/27/2020] [Indexed: 02/06/2023]
Abstract
In mammals, the Keap1-Nrf2-ARE pathway (henceforth, "the Nrf2 pathway") and autophagy are major intracellular defence systems that combat oxidative damage and maintain homeostasis. p62/SQSTM1, a ubiquitin-binding autophagy receptor protein, links the Nrf2 pathway and autophagy. Phosphorylation of p62 dramatically enhances its affinity for Keap1, which induces Keap1 to release Nrf2, and the p62-Keap1 heterodimer recruits LC3 and mediates the permanent degradation of Keap1 in the selective autophagy pathway. Eventually, Nrf2 accumulates in the cytoplasm and then translocates into the nucleus to activate the transcription of downstream genes that encode antioxidant enzymes, which protect cells from oxidative damage. Since Nrf2 also upregulates the expression of the p62 gene, a p62-Keap1-Nrf2 positive feedback loop is created that further enhances the protective effect on cells. Studies have shown that the p62-activated noncanonical Nrf2 pathway is an important marker of neurodegenerative diseases. The p62-Keap1-Nrf2 positive feedback loop and the Nrf2 pathway are involved in eliminating the ROS and protein aggregates induced by AD. Therefore, maintaining the homeostasis of the p62-Keap1-Nrf2 positive feedback loop, which is a bridge between the Nrf2 pathway and autophagy, may be a potential target for the treatment of AD.
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Affiliation(s)
- Weiwei Zhang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, People's Republic of China
| | - Cong Feng
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, People's Republic of China
| | - Hong Jiang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, People's Republic of China.
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Zweig JA, Brandes MS, Brumbach BH, Caruso M, Wright KM, Quinn JF, Soumyanath A, Gray NE. Prolonged Treatment with Centella asiatica Improves Memory, Reduces Amyloid-β Pathology, and Activates NRF2-Regulated Antioxidant Response Pathway in 5xFAD Mice. J Alzheimers Dis 2021; 81:1453-1468. [PMID: 33935097 PMCID: PMC10878128 DOI: 10.3233/jad-210271] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND The medicinal herb Centella asiatica has been long been used for its neuroprotective and cognitive enhancing effects. We have previously shown that two weeks of treatment with a water extract of Centella asiatica (CAW) improves cognition and activates the endogenous antioxidant response pathway without altering amyloid-β (Aβ) plaque burden. OBJECTIVE Here, we assess the effect of long-term treatment of CAW in the 5xFAD mouse model of Aβ accumulation. METHODS Four-month-old 5xFAD mice were treated with CAW in their drinking water (2 g/L) for three months at which point they underwent cognitive testing as well as analysis of Aβ plaque levels and antioxidant and synaptic gene expression. In order to confirm the involvement of the antioxidant regulatory transcription factor NRF2 on the effects of CAW on synaptic plasticity, neurons isolated from 5xFAD mice were also treated with CAW and the targeted inhibitor ML385. RESULTS Three months of treatment with CAW improved spatial and contextual memory as well as executive function in 5xFAD mice. This improvement was accompanied by increased antioxidant gene expression and a decrease in Aβ plaque burden relative to untreated 5xFAD animals. In isolated neurons, treatment with ML385 blocked the effects of CAW on dendritic arborization and synaptic gene expression. CONCLUSION These results suggest that prolonged CAW exposure could be beneficial in Alzheimer's disease and that these effects likely involve NRF2 activation. Moreover, these findings suggest that targeting NRF2 itself may be a relevant therapeutic strategy for improving synaptic plasticity and cognitive function in Alzheimer's disease.
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Affiliation(s)
- Jonathan A. Zweig
- Department of Neurology, Oregon Health & Science University, Portland, OR, USA
| | - Mikah S. Brandes
- Department of Neurology, Oregon Health & Science University, Portland, OR, USA
| | - Barbara H. Brumbach
- Biostatistics & Design Program Core, Oregon Health & Science University, Portland, OR, USA
| | - Maya Caruso
- Department of Neurology, Oregon Health & Science University, Portland, OR, USA
| | - Kirsten M. Wright
- Department of Neurology, Oregon Health & Science University, Portland, OR, USA
| | - Joseph F. Quinn
- Department of Neurology, Oregon Health & Science University, Portland, OR, USA
- Department of Neurology and Parkinson’s Disease Research Education and Clinical Care Center (PADRECC), VA Portland Healthcare System, Portland, OR, USA
| | - Amala Soumyanath
- Department of Neurology, Oregon Health & Science University, Portland, OR, USA
| | - Nora E. Gray
- Department of Neurology, Oregon Health & Science University, Portland, OR, USA
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Cioffi F, Adam RHI, Broersen K. Molecular Mechanisms and Genetics of Oxidative Stress in Alzheimer's Disease. J Alzheimers Dis 2020; 72:981-1017. [PMID: 31744008 PMCID: PMC6971833 DOI: 10.3233/jad-190863] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Alzheimer’s disease is the most common neurodegenerative disorder that can cause dementia in elderly over 60 years of age. One of the disease hallmarks is oxidative stress which interconnects with other processes such as amyloid-β deposition, tau hyperphosphorylation, and tangle formation. This review discusses current thoughts on molecular mechanisms that may relate oxidative stress to Alzheimer’s disease and identifies genetic factors observed from in vitro, in vivo, and clinical studies that may be associated with Alzheimer’s disease-related oxidative stress.
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Affiliation(s)
- Federica Cioffi
- Nanobiophysics Group, Technical Medical Centre, Faculty of Science and Technology, University of Twente, Enschede, The Netherlands
| | - Rayan Hassan Ibrahim Adam
- Nanobiophysics Group, Technical Medical Centre, Faculty of Science and Technology, University of Twente, Enschede, The Netherlands
| | - Kerensa Broersen
- Applied Stem Cell Technologies, Technical Medical Centre, Faculty of Science and Technology, University of Twente, Enschede, The Netherlands
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Gonzalo-Gobernado R, Perucho J, Vallejo-Muñoz M, Casarejos MJ, Reimers D, Jiménez-Escrig A, Gómez A, Ulzurrun de Asanza GM, Bazán E. Liver Growth Factor "LGF" as a Therapeutic Agent for Alzheimer's Disease. Int J Mol Sci 2020; 21:ijms21239201. [PMID: 33276671 PMCID: PMC7730107 DOI: 10.3390/ijms21239201] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 11/27/2020] [Accepted: 11/29/2020] [Indexed: 12/18/2022] Open
Abstract
Alzheimer's disease (AD) is a progressive degenerative disorder and the most common cause of dementia in aging populations. Although the pathological hallmarks of AD are well defined, currently no effective therapy exists. Liver growth factor (LGF) is a hepatic albumin-bilirubin complex with activity as a tissue regenerating factor in several neurodegenerative disorders such as Parkinson's disease and Friedreich's ataxia. Our aim here was to analyze the potential therapeutic effect of LGF on the APPswe mouse model of AD. Twenty-month-old mice received intraperitoneal (i.p.) injections of 1.6 µg LGF or saline, twice a week during three weeks. Mice were sacrificed one week later, and the hippocampus and dorsal cortex were prepared for immunohistochemical and biochemical studies. LGF treatment reduced amyloid-β (Aβ) content, phospho-Tau/Tau ratio and the number of Aβ plaques with diameter larger than 25 µm. LGF administration also modulated protein ubiquitination and HSP70 protein levels, reduced glial reactivity and inflammation, and the expression of the pro-apoptotic protein Bax. Because the administration of this factor also restored cognitive damage in APPswe mice, we propose LGF as a novel therapeutic tool that may be useful for the treatment of AD.
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Affiliation(s)
- Rafael Gonzalo-Gobernado
- Servicio de Neurobiología, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034 Madrid, Spain; (R.G.-G.); (J.P.); (M.V.-M.); (M.J.C.); (D.R.); (A.J.E.); (A.G.); (G.M.U.d.A.)
- National Centre for Biotechnology (CNB), CSIC, 28049 Madrid, Spain
| | - Juan Perucho
- Servicio de Neurobiología, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034 Madrid, Spain; (R.G.-G.); (J.P.); (M.V.-M.); (M.J.C.); (D.R.); (A.J.E.); (A.G.); (G.M.U.d.A.)
| | - Manuela Vallejo-Muñoz
- Servicio de Neurobiología, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034 Madrid, Spain; (R.G.-G.); (J.P.); (M.V.-M.); (M.J.C.); (D.R.); (A.J.E.); (A.G.); (G.M.U.d.A.)
| | - Maria José Casarejos
- Servicio de Neurobiología, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034 Madrid, Spain; (R.G.-G.); (J.P.); (M.V.-M.); (M.J.C.); (D.R.); (A.J.E.); (A.G.); (G.M.U.d.A.)
| | - Diana Reimers
- Servicio de Neurobiología, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034 Madrid, Spain; (R.G.-G.); (J.P.); (M.V.-M.); (M.J.C.); (D.R.); (A.J.E.); (A.G.); (G.M.U.d.A.)
| | - Adriano Jiménez-Escrig
- Servicio de Neurobiología, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034 Madrid, Spain; (R.G.-G.); (J.P.); (M.V.-M.); (M.J.C.); (D.R.); (A.J.E.); (A.G.); (G.M.U.d.A.)
- Servicio de Neurología, Hospital Ramón y Cajal, 28034 Madrid, Spain
| | - Ana Gómez
- Servicio de Neurobiología, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034 Madrid, Spain; (R.G.-G.); (J.P.); (M.V.-M.); (M.J.C.); (D.R.); (A.J.E.); (A.G.); (G.M.U.d.A.)
| | - Gonzalo M. Ulzurrun de Asanza
- Servicio de Neurobiología, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034 Madrid, Spain; (R.G.-G.); (J.P.); (M.V.-M.); (M.J.C.); (D.R.); (A.J.E.); (A.G.); (G.M.U.d.A.)
| | - Eulalia Bazán
- Servicio de Neurobiología, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034 Madrid, Spain; (R.G.-G.); (J.P.); (M.V.-M.); (M.J.C.); (D.R.); (A.J.E.); (A.G.); (G.M.U.d.A.)
- Correspondence: ; Tel.: +34-913-368-168
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Osama A, Zhang J, Yao J, Yao X, Fang J. Nrf2: a dark horse in Alzheimer's disease treatment. Ageing Res Rev 2020; 64:101206. [PMID: 33144124 DOI: 10.1016/j.arr.2020.101206] [Citation(s) in RCA: 116] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 10/23/2020] [Accepted: 10/27/2020] [Indexed: 12/12/2022]
Abstract
Alzheimer's disease (AD), an age-dependent neurodegenerative disorder, is the main cause of dementia. Common hallmarks of AD include the amyloid β-peptide (Aβ) aggregation, high levels of hyperphosphorylated tau protein (p-tau) and failure in redox homeostasis. To date, all proposed drugs affecting Aβ and/or p-tau have been failed in clinical trials. A decline in the expression of the transcription factor Nrf2 (nuclear factor-erythroid 2-p45 derived factor 2) and its driven genes (NQO1, HO-1, and GCLC), and alteration of the Nrf2-related pathways have been observed in AD brains. Nrf2 plays a critical role in maintaining cellular redox homeostasis and regulating inflammation response. Nrf2 activation also provides cytoprotection against increasing pathologies including neurodegenerative diseases. These lines of evidence imply that Nrf2 activation may be a novel AD treatment option. Interestingly, recent studies have also demonstrated that Nrf2 interferes with several key pathogenic processes in AD including Aβ and p-tau pathways. The current review aims to provide insights into the role of Nrf2 in AD. Also, we discuss the progress and challenges regarding the Nrf2 activators for AD treatment.
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Affiliation(s)
- Alsiddig Osama
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Junmin Zhang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China; State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau, China
| | - Juan Yao
- School of pharmacy, Gansu University of Chinese Medicine, Lanzhou, 730000, China
| | - Xiaojun Yao
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China; State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau, China.
| | - Jianguo Fang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
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Sigfridsson E, Marangoni M, Hardingham GE, Horsburgh K, Fowler JH. Deficiency of Nrf2 exacerbates white matter damage and microglia/macrophage levels in a mouse model of vascular cognitive impairment. J Neuroinflammation 2020; 17:367. [PMID: 33261626 PMCID: PMC7709339 DOI: 10.1186/s12974-020-02038-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 11/17/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Chronic cerebral hypoperfusion causes damage to the brain's white matter underpinning vascular cognitive impairment. Inflammation and oxidative stress have been proposed as key pathophysiological mechanisms of which the transcription factor Nrf2 is a master regulator. We hypothesised that white matter pathology, microgliosis, blood-brain barrier breakdown and behavioural deficits induced by chronic hypoperfusion would be exacerbated in mice deficient in the transcription factor Nrf2. METHODS Mice deficient in Nrf2 (male heterozygote or homozygous for Nrf2 knockout) or wild-type littermates on a C57Bl6/J background underwent bilateral carotid artery stenosis (BCAS) to induce chronic cerebral hypoperfusion or sham surgery and survived for a further 6 weeks. White matter pathology was assessed with MAG immunohistochemistry as a marker of altered axon-glial integrity; alterations to astrocytes and microglia/macrophages were assessed with GFAP and Iba1 immunohistochemistry, and blood-brain barrier breakdown was assessed with IgG immunohistochemistry. Behavioural alterations were assessed using 8-arm radial arm maze, and alterations to Nrf2-related and inflammatory-related genes were assessed with qRT-PCR. RESULTS Chronic cerebral hypoperfusion induced white matter pathology, elevated microglial/macrophage levels and blood-brain barrier breakdown in white matter tracts that were increased in Nrf2+/- mice and further exacerbated by the complete absence of Nrf2. Chronic hypoperfusion induced white matter astrogliosis and induced an impairment in behaviour assessed with radial arm maze; however, these measures were not affected by Nrf2 deficiency. Although Nrf2-related antioxidant gene expression was not altered by chronic cerebral hypoperfusion, there was evidence for elevated pro-inflammatory related gene expression following chronic hypoperfusion that was not affected by Nrf2 deficiency. CONCLUSIONS The results demonstrate that the absence of Nrf2 exacerbates white matter pathology and microgliosis following cerebral hypoperfusion but does not affect behavioural impairment.
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Affiliation(s)
- Emma Sigfridsson
- Centre for Discovery Brain Sciences, University of Edinburgh, Chancellor’s Building, 49 Little France Crescent, Edinburgh, EH16 4SB UK
| | - Martina Marangoni
- Centre for Discovery Brain Sciences, University of Edinburgh, Chancellor’s Building, 49 Little France Crescent, Edinburgh, EH16 4SB UK
- Present address: Department of Health Sciences, University of Florence, Florence, Italy
| | - Giles E. Hardingham
- Centre for Discovery Brain Sciences, University of Edinburgh, Chancellor’s Building, 49 Little France Crescent, Edinburgh, EH16 4SB UK
- The UK Dementia Research Institute, University of Edinburgh, Edinburgh, UK
| | - Karen Horsburgh
- Centre for Discovery Brain Sciences, University of Edinburgh, Chancellor’s Building, 49 Little France Crescent, Edinburgh, EH16 4SB UK
| | - Jill H. Fowler
- Centre for Discovery Brain Sciences, University of Edinburgh, Chancellor’s Building, 49 Little France Crescent, Edinburgh, EH16 4SB UK
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49
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Mitochondrial dysfunction in the development and progression of neurodegenerative diseases. Arch Biochem Biophys 2020; 702:108698. [PMID: 33259796 DOI: 10.1016/j.abb.2020.108698] [Citation(s) in RCA: 110] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/11/2020] [Accepted: 11/21/2020] [Indexed: 02/07/2023]
Abstract
In addition to ATP synthesis, mitochondria are highly dynamic organelles that modulate apoptosis, ferroptosis, and inflammasome activation. Through executing these varied functions, the mitochondria play critical roles in the development and progression of neurodegenerative diseases including Alzheimer's disease, Parkinson's disease, Huntington's disease, and Friedreich ataxia, among others. Impaired mitochondrial biogenesis and abnormal mitochondrial dynamics contribute to mitochondrial dysfunction in these diseases. Additionally, dysfunctional mitochondria play critical roles in signaling for both inflammasome activation and ferroptosis. Therapeutics are being developed to circumvent inflammasome activation and ferroptosis in dysfunctional mitochondria. Targeting these aspects of mitochondrial dysfunction may present viable therapeutic strategies for combatting the neurodegenerative diseases. This review aims to summarize the role of the mitochondria in the development and progression of neurodegenerative diseases and to present current therapeutic approaches that target mitochondrial dysfunction in these diseases.
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Netrin-1 protects the SH-SY5Y cells against amyloid beta neurotoxicity through NF-κB/Nrf2 dependent mechanism. Mol Biol Rep 2020; 47:9271-9277. [PMID: 33206363 DOI: 10.1007/s11033-020-05996-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 11/10/2020] [Indexed: 12/31/2022]
Abstract
Many evidence confirms that amyloid beta 1-42 fragment (Aβ1-42) causes neuroinflammation, oxidative stress, and cell death, which are related to progressive memory loss, cognitive impairments and mental disorders that will lead to Alzheimer's disease (AD) progression. Netrin-1, as a member of the laminins, has been proved to inhibit apoptosis and inflammation outside of nervous system, in addition to having a vital role in morphogenesis and neurogenesis of neural system. This study was designed to assess the protective effects of netrin-1 in SH-SY5Y human neuroblastoma cell line exposed to Aβ1-42 and to explore some mechanisms that underlie netrin-1 effects. Cultured SH-SY5Y neuroblast-like cells were treated with netrin-1 prior to Aβ1-42 exposure and the effects were assessed by MTT and ELISA assay kits. Netrin- 1 pretreatment of Aβ1-42-exposed SH-SY5Y human neuroblastoma cells attenuated Aβ1-42 induced toxic effects, increased cell viability and partially restored levels of 3 inflammatory and oxidative stress biomarkers including: nuclear factor erythroid 2-like 2 (Nrf2), tumor necrosis factor alpha (TNFα) and nuclear factor kappa-light chain-enhancer of activated B cells (NF-κB). Based on the findings of this study, netrin-1 represents a promising therapeutic bio agent to abrogate cellular inflammation and reactive oxygen species (ROS) activation induced by Aβ1-42 in the SH-SY5Y cell model of AD.
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