1
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Xu C, Mei Y, Yang R, Luo Q, Zhang J, Kou X, Hu J, Wang Y, Li Y, Chen R, Zhang Z, Yao Y, Sima J. Edaravone Dexborneol mitigates pathology in animal and cell culture models of Alzheimer's disease by inhibiting neuroinflammation and neuronal necroptosis. Cell Biosci 2024; 14:55. [PMID: 38678262 PMCID: PMC11056062 DOI: 10.1186/s13578-024-01230-8] [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: 01/25/2024] [Accepted: 04/05/2024] [Indexed: 04/29/2024] Open
Abstract
BACKGROUND Alzheimer's disease (AD) is the most prevalent neurodegenerative disease with limited disease-modifying treatments. Drug repositioning strategy has now emerged as a promising approach for anti-AD drug discovery. Using 5×FAD mice and Aβ-treated neurons in culture, we tested the efficacy of Y-2, a compounded drug containing the antioxidant Edaravone (Eda), a pyrazolone and (+)-Borneol, an anti-inflammatory diterpenoid from cinnamon, approved for use in amyotrophic lateral sclerosis patients. RESULTS We examined effects of Y-2 versus Eda alone by i.p. administered in 8-week-old 5×FAD mice (females) for 4 months by comparing cognitive function, Aβ pathologies, neuronal necroptosis and neuroinflammation. Using primary neurons and astrocytes, as well as neuronal and astrocytic cell lines, we elucidated the molecular mechanisms of Y-2 by examining neuronal injury, astrocyte-mediated inflammation and necroptosis. Here, we find that Y-2 improves cognitive function in AD mice. Histopathological data show that Y-2, better than Eda alone, markedly ameliorates Aβ pathologies including Aβ burden, astrogliosis/microgliosis, and Tau phosphorylation. In addition, Y-2 reduces Aβ-induced neuronal injury including neurite damage, mitochondrial impairment, reactive oxygen species production and NAD+ depletion. Notably, Y-2 inhibits astrocyte-mediated neuroinflammation and attenuates TNF-α-triggered neuronal necroptosis in cell cultures and AD mice. RNA-seq further demonstrates that Y-2, compared to Eda, indeed upregulates anti-inflammation pathways in astrocytes. CONCLUSIONS Our findings infer that Y-2, better than Eda alone, mitigates AD pathology and may provide a potential drug candidate for AD treatment.
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Affiliation(s)
- Chong Xu
- Laboratory of Aging Neuroscience and Neuropharmacology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Yilan Mei
- Laboratory of Aging Neuroscience and Neuropharmacology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Ruihan Yang
- Laboratory of Aging Neuroscience and Neuropharmacology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Qiudan Luo
- Laboratory of Aging Neuroscience and Neuropharmacology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Jienian Zhang
- Laboratory of Aging Neuroscience and Neuropharmacology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Xiaolin Kou
- Department of Pharmacology, NeuroDawn Pharmaceutical Co., Ltd, Nanjing, 211199, China
| | - Jianfeng Hu
- Laboratory of Aging Neuroscience and Neuropharmacology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
- Department of Pharmacology, NeuroDawn Pharmaceutical Co., Ltd, Nanjing, 211199, China
| | - Yujie Wang
- Laboratory of Aging Neuroscience and Neuropharmacology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Yue Li
- Laboratory of Aging Neuroscience and Neuropharmacology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Rong Chen
- Department of Pharmacology, NeuroDawn Pharmaceutical Co., Ltd, Nanjing, 211199, China
| | - Zhengping Zhang
- Department of Pharmacology, NeuroDawn Pharmaceutical Co., Ltd, Nanjing, 211199, China.
| | - Yuyuan Yao
- Laboratory of Aging Neuroscience and Neuropharmacology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, China.
| | - Jian Sima
- Laboratory of Aging Neuroscience and Neuropharmacology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, China.
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Martin SP, Leeman-Markowski BA. Proposed mechanisms of tau: relationships to traumatic brain injury, Alzheimer's disease, and epilepsy. Front Neurol 2024; 14:1287545. [PMID: 38249745 PMCID: PMC10797726 DOI: 10.3389/fneur.2023.1287545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 11/30/2023] [Indexed: 01/23/2024] Open
Abstract
Traumatic brain injury (TBI), Alzheimer's disease (AD), and epilepsy share proposed mechanisms of injury, including neuronal excitotoxicity, cascade signaling, and activation of protein biomarkers such as tau. Although tau is typically present intracellularly, in tauopathies, phosphorylated (p-) and hyper-phosphorylated (hp-) tau are released extracellularly, the latter leading to decreased neuronal stability and neurofibrillary tangles (NFTs). Tau cleavage at particular sites increases susceptibility to hyper-phosphorylation, NFT formation, and eventual cell death. The relationship between tau and inflammation, however, is unknown. In this review, we present evidence for an imbalanced endoplasmic reticulum (ER) stress response and inflammatory signaling pathways resulting in atypical p-tau, hp-tau and NFT formation. Further, we propose tau as a biomarker for neuronal injury severity in TBI, AD, and epilepsy. We present a hypothesis of tau phosphorylation as an initial acute neuroprotective response to seizures/TBI. However, if the underlying seizure pathology or TBI recurrence is not effectively treated, and the pathway becomes chronically activated, we propose a "tipping point" hypothesis that identifies a transition of tau phosphorylation from neuroprotective to injurious. We outline the role of amyloid beta (Aβ) as a "last ditch effort" to revert the cell to programmed death signaling, that, when fails, transitions the mechanism from injurious to neurodegenerative. Lastly, we discuss targets along these pathways for therapeutic intervention in AD, TBI, and epilepsy.
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Affiliation(s)
- Samantha P. Martin
- Comprehensive Epilepsy Center, New York University Langone Health, New York, NY, United States
- Department of Neurology, New York University Langone Health, New York, NY, United States
- New York University Grossman School of Medicine, New York, NY, United States
- VA New York Harbor Healthcare System, New York, NY, United States
| | - Beth A. Leeman-Markowski
- Comprehensive Epilepsy Center, New York University Langone Health, New York, NY, United States
- Department of Neurology, New York University Langone Health, New York, NY, United States
- VA New York Harbor Healthcare System, New York, NY, United States
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3
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Hyun Yi J, Cho E, Lee S, Ja Kwon K, Lee S, Lee J, Lee C, Young Shin C, Hyun Kim D, Hee Shim S. Aβ dissociation by pectolinarin may counteract against Aβ-induced synaptic dysfunction and memory impairment. Biochem Pharmacol 2023; 216:115792. [PMID: 37689271 DOI: 10.1016/j.bcp.2023.115792] [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: 07/11/2023] [Revised: 09/05/2023] [Accepted: 09/06/2023] [Indexed: 09/11/2023]
Abstract
Alzheimer's disease (AD) is a degenerative brain disorder characterised by various neurological symptoms, including memory impairment and mood disorders, associated with the abnormal accumulation of amyloid b(Aβ) and tau proteins in the brain. There is still no definitive treatment available for AD, and the Aβ antibody drugs, which are expected to be approved by the FDA, have many limitations. Therefore, there is an urgent need to develop low-molecular-weight therapeutic agents for the management of AD. In this study, we investigated whether pectolinarin, a flavonoid, regulates Aβ aggregation and Aβ-induced toxicity. Pectolinarin demonstrated concentration-dependent inhibition of Aβ aggregation and had the ability to break down pre-formed Aβ aggregates, thereby reducing their neurotoxicity. Furthermore, pectolinarin suppressed Aβ aggregates-induced reduction in long-term potentiation (LTP) in the hippocampus. Oral administration of pectolinarin in experimental animals inhibited memory impairment and LTP deficits induced by Aβ injection in the hippocampus. These results indicate that pectolinarin may reduce toxic Aβ species and Aβ-induced memory impairments and synaptic dysfunction.
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Affiliation(s)
- Jee Hyun Yi
- Center for Synaptic Brain Dysfunctions, Institute for Basic Science, Daejeon 34141, Republic of Korea
| | - Eunbi Cho
- Department of Pharmacology and Department of Advanced Translational Medicine, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Soowon Lee
- College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyoung Ja Kwon
- Department of Pharmacology and Department of Advanced Translational Medicine, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea; Institute of Biomedical Sciences & Technology, Konkuk University, Seoul 05029, Republic of Korea
| | - Seungheon Lee
- Department of Marine Life Sciences, Jeju National University, Jeju 63243, Republic of Korea
| | - Juyong Lee
- Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Republic of Korea; Arontier Co., Seoul 06735, Republic of Korea
| | - Changyeol Lee
- Herbal Medicine Resources Center, Korea Institute of Oriental Medicine, Naju 58245, Republic of Korea
| | - Chan Young Shin
- Department of Pharmacology and Department of Advanced Translational Medicine, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea; Institute of Biomedical Sciences & Technology, Konkuk University, Seoul 05029, Republic of Korea
| | - Dong Hyun Kim
- Department of Pharmacology and Department of Advanced Translational Medicine, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea; Institute of Biomedical Sciences & Technology, Konkuk University, Seoul 05029, Republic of Korea.
| | - Sang Hee Shim
- College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea.
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Poejo J, Berrocal M, Saez L, Gutierrez-Merino C, Mata AM. Store-Operated Calcium Entry Inhibition and Plasma Membrane Calcium Pump Upregulation Contribute to the Maintenance of Resting Cytosolic Calcium Concentration in A1-like Astrocytes. Molecules 2023; 28:5363. [PMID: 37513235 PMCID: PMC10383710 DOI: 10.3390/molecules28145363] [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: 06/06/2023] [Revised: 06/30/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
Highly neurotoxic A1-reactive astrocytes have been associated with several human neurodegenerative diseases. Complement protein C3 expression is strongly upregulated in A1 astrocytes, and this protein has been shown to be a specific biomarker of these astrocytes. Several cytokines released in neurodegenerative diseases have been shown to upregulate the production of amyloid β protein precursor (APP) and neurotoxic amyloid β (Aβ) peptides in reactive astrocytes. Also, aberrant Ca2+ signals have been proposed as a hallmark of astrocyte functional remodeling in Alzheimer's disease mouse models. In this work, we induced the generation of A1-like reactive astrocytes after the co-treatment of U251 human astroglioma cells with a cocktail of the cytokines TNF-α, IL1-α and C1q. These A1-like astrocytes show increased production of APP and Aβ peptides compared to untreated U251 cells. Additionally, A1-like astrocytes show a (75 ± 10)% decrease in the Ca2+ stored in the endoplasmic reticulum (ER), (85 ± 10)% attenuation of Ca2+ entry after complete Ca2+ depletion of the ER, and three-fold upregulation of plasma membrane calcium pump expression, with respect to non-treated Control astrocytes. These altered intracellular Ca2+ dynamics allow A1-like astrocytes to efficiently counterbalance the enhanced release of Ca2+ from the ER, preventing a rise in the resting cytosolic Ca2+ concentration.
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Affiliation(s)
- Joana Poejo
- Instituto de Biomarcadores de Patologías Moleculares (IBPM), Universidad de Extremadura, 06006 Badajoz, Spain
| | - María Berrocal
- Instituto de Biomarcadores de Patologías Moleculares (IBPM), Universidad de Extremadura, 06006 Badajoz, Spain
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Ciencias, Universidad de Extremadura, 06006 Badajoz, Spain
| | - Lucía Saez
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Ciencias, Universidad de Extremadura, 06006 Badajoz, Spain
| | - Carlos Gutierrez-Merino
- Instituto de Biomarcadores de Patologías Moleculares (IBPM), Universidad de Extremadura, 06006 Badajoz, Spain
| | - Ana M Mata
- Instituto de Biomarcadores de Patologías Moleculares (IBPM), Universidad de Extremadura, 06006 Badajoz, Spain
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Ciencias, Universidad de Extremadura, 06006 Badajoz, Spain
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5
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Valencia-Olvera AC, Balu D, Faulk N, Amiridis A, Wang Y, Pham C, Avila-Munoz E, York JM, Thatcher GRJ, LaDu MJ. Inhibition of ACAT as a Therapeutic Target for Alzheimer's Disease Is Independent of ApoE4 Lipidation. Neurotherapeutics 2023; 20:1120-1137. [PMID: 37157042 PMCID: PMC10457278 DOI: 10.1007/s13311-023-01375-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/20/2023] [Indexed: 05/10/2023] Open
Abstract
APOE4, encoding apolipoprotein E4 (apoE4), is the greatest genetic risk factor for Alzheimer's disease (AD), compared to the common APOE3. While the mechanism(s) underlying APOE4-induced AD risk remains unclear, increasing the lipidation of apoE4 is an important therapeutic target as apoE4-lipoproteins are poorly lipidated compared to apoE3-lipoproteins. ACAT (acyl-CoA: cholesterol-acyltransferase) catalyzes the formation of intracellular cholesteryl-ester droplets, reducing the intracellular free cholesterol (FC) pool. Thus, inhibiting ACAT increases the FC pool and facilitates lipid secretion to extracellular apoE-containing lipoproteins. Previous studies using commercial ACAT inhibitors, including avasimibe (AVAS), as well as ACAT-knock out (KO) mice, exhibit reduced AD-like pathology and amyloid precursor protein (APP) processing in familial AD (FAD)-transgenic (Tg) mice. However, the effects of AVAS with human apoE4 remain unknown. In vitro, AVAS induced apoE efflux at concentrations of AVAS measured in the brains of treated mice. AVAS treatment of male E4FAD-Tg mice (5xFAD+/-APOE4+/+) at 6-8 months had no effect on plasma cholesterol levels or distribution, the original mechanism for AVAS treatment of CVD. In the CNS, AVAS reduced intracellular lipid droplets, indirectly demonstrating target engagement. Surrogate efficacy was demonstrated by an increase in Morris water maze measures of memory and postsynaptic protein levels. Amyloid-beta peptide (Aβ) solubility/deposition and neuroinflammation were reduced, critical components of APOE4-modulated pathology. However, there was no increase in apoE4 levels or apoE4 lipidation, while amyloidogenic and non-amyloidogenic processing of APP were significantly reduced. This suggests that the AVAS-induced reduction in Aβ via reduced APP processing was sufficient to reduce AD pathology, as apoE4-lipoproteins remained poorly lipidated.
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Affiliation(s)
- Ana C. Valencia-Olvera
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, Chicago, IL 60612 USA
| | - Deebika Balu
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, Chicago, IL 60612 USA
| | - Naomi Faulk
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, Chicago, IL 60612 USA
| | | | - Yueting Wang
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL 60612 USA
- Present Address: AbbVie Inc., 1 N. Waukegan Road, North Chicago, IL 60064 USA
| | - Christine Pham
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, Chicago, IL 60612 USA
| | - Eva Avila-Munoz
- Syneos Health, Av. Gustavo Baz 309, La Loma, Tlalnepantla de Baz, 54060 Mexico
| | - Jason M. York
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, Chicago, IL 60612 USA
| | - Gregory R. J. Thatcher
- Department of Pharmacology & Toxicology, University of Arizona, 1703 E Mabel St., Tucson, AZ 85721 USA
| | - Mary Jo LaDu
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, Chicago, IL 60612 USA
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6
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Xu Y, Zheng F, Zhong Q, Zhu Y. Ketogenic Diet as a Promising Non-Drug Intervention for Alzheimer’s Disease: Mechanisms and Clinical Implications. J Alzheimers Dis 2023; 92:1173-1198. [PMID: 37038820 DOI: 10.3233/jad-230002] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Alzheimer’s disease (AD) is a progressive neurodegenerative disorder that is mainly characterized by cognitive deficits. Although many studies have been devoted to developing disease-modifying therapies, there has been no effective therapy until now. However, dietary interventions may be a potential strategy to treat AD. The ketogenic diet (KD) is a high-fat and low-carbohydrate diet with adequate protein. KD increases the levels of ketone bodies, providing an alternative energy source when there is not sufficient energy supply because of impaired glucose metabolism. Accumulating preclinical and clinical studies have shown that a KD is beneficial to AD. The potential underlying mechanisms include improved mitochondrial function, optimization of gut microbiota composition, and reduced neuroinflammation and oxidative stress. The review provides an update on clinical and preclinical research on the effects of KD or medium-chain triglyceride supplementation on symptoms and pathophysiology in AD. We also detail the potential mechanisms of KD, involving amyloid and tau proteins, neuroinflammation, gut microbiota, oxidative stress, and brain metabolism. We aimed to determine the function of the KD in AD and outline important aspects of the mechanism, providing a reference for the implementation of the KD as a potential therapeutic strategy for AD.
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Affiliation(s)
- Yunlong Xu
- Shenzhen Key Laboratory of Drug Addiction, Shenzhen Neher Neural Plasticity Laboratory, the Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences (CAS), Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, China
- University of Chinese Academy of Sciences, Beijing, China
- Department of Neonatology, Shenzhen Maternity & Child Healthcare Hospital, The First School of Clinical Medicine, Southern Medical University, Shenzhen, China
| | - Fuxiang Zheng
- Department of Clinical Laboratory, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China
| | - Qi Zhong
- Department of Neurology, Shenzhen Luohu People’s Hospital; The Third Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Yingjie Zhu
- Shenzhen Key Laboratory of Drug Addiction, Shenzhen Neher Neural Plasticity Laboratory, the Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences (CAS), Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, China
- University of Chinese Academy of Sciences, Beijing, China
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7
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Seol S, Kwon J, Kang HJ. Cell type characterization of spatiotemporal gene co-expression modules in Down syndrome brain. iScience 2022; 26:105884. [PMID: 36647384 PMCID: PMC9840153 DOI: 10.1016/j.isci.2022.105884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 11/02/2022] [Accepted: 12/22/2022] [Indexed: 12/29/2022] Open
Abstract
Down syndrome (DS) is the most common genetic cause of intellectual disability and increases the risk of other brain-related dysfunctions, like seizures, early-onset Alzheimer's disease, and autism. To reveal the molecular profiles of DS-associated brain phenotypes, we performed a meta-data analysis of the developmental DS brain transcriptome at cell type and co-expression module levels. In the DS brain, astrocyte-, microglia-, and endothelial cell-associated genes show upregulated patterns, whereas neuron- and oligodendrocyte-associated genes show downregulated patterns. Weighted gene co-expression network analysis identified cell type-enriched co-expressed gene modules. We present eight representative cell-type modules for neurons, astrocytes, oligodendrocytes, and microglia. We classified the neuron modules into glutamatergic and GABAergic neurons and associated them with detailed subtypes. Cell type modules were interpreted by analyzing spatiotemporal expression patterns, functional annotations, and co-expression networks of the modules. This study provides insight into the mechanisms underlying brain abnormalities in DS and related disorders.
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Affiliation(s)
- Sihwan Seol
- Department of Life Science, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Joonhong Kwon
- Department of Life Science, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Hyo Jung Kang
- Department of Life Science, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea,Corresponding author
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8
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Ng W, Ng SY. Remodeling of astrocyte secretome in amyotrophic lateral sclerosis: uncovering novel targets to combat astrocyte-mediated toxicity. Transl Neurodegener 2022; 11:54. [PMID: 36567359 PMCID: PMC9791755 DOI: 10.1186/s40035-022-00332-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 12/05/2022] [Indexed: 12/27/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is an adult-onset paralytic disease characterized by progressive degeneration of upper and lower motor neurons in the motor cortex, brainstem and spinal cord. Motor neuron degeneration is typically caused by a combination of intrinsic neuronal (cell autonomous) defects as well as extrinsic (non-cell autonomous) factors such as astrocyte-mediated toxicity. Astrocytes are highly plastic cells that react to their microenvironment to mediate relevant responses. In neurodegeneration, astrocytes often turn reactive and in turn secrete a slew of factors to exert pro-inflammatory and neurotoxic effects. Various efforts have been carried out to characterize the diseased astrocyte secretome over the years, revealing that pro-inflammatory chemokines, cytokines and microRNAs are the main players in mediating neuronal death. As metabolomic technologies mature, these studies begin to shed light on neurotoxic metabolites such as secreted lipids. In this focused review, we will discuss changes in the astrocyte secretome during ALS. In particular, we will discuss the components of the reactive astrocyte secretome that contribute to neuronal death in ALS.
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Affiliation(s)
- Winanto Ng
- grid.418812.60000 0004 0620 9243Institute of Molecular and Cell Biology, A*STAR Research Entities, Singapore, 138673 Singapore
| | - Shi-Yan Ng
- grid.418812.60000 0004 0620 9243Institute of Molecular and Cell Biology, A*STAR Research Entities, Singapore, 138673 Singapore
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9
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Mu L, Xia D, Cai J, Gu B, Liu X, Friedman V, Liu QS, Zhao L. Treadmill Exercise Reduces Neuroinflammation, Glial Cell Activation and Improves Synaptic Transmission in the Prefrontal Cortex in 3 × Tg-AD Mice. Int J Mol Sci 2022; 23:12655. [PMID: 36293516 PMCID: PMC9604030 DOI: 10.3390/ijms232012655] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/17/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022] Open
Abstract
Physical exercise improves memory and cognition in physiological aging and Alzheimer's disease (AD), but the mechanisms remain poorly understood. Here, we test the hypothesis that Aβ oligomer accumulation, neuroinflammation, and glial cell activation may lead to disruption of synaptic transmission in the prefrontal cortex of 3 × Tg-AD Mice, resulting in impairment of learning and memory. On the other hand, treadmill exercise could prevent the pathogenesis and exert neuroprotective effects. Here, we used immunohistochemistry, western blotting, enzyme-linked immunosorbent assay, and slice electrophysiology to analyze the levels of GSK3β, Aβ oligomers (Aβ dimers and trimers), pro-inflammatory cytokines (IL-1β, IL-6, and TNFα), the phosphorylation of CRMP2 at Thr514, and synaptic currents in pyramidal neurons in the prefrontal cortex. We show that 12-week treadmill exercise beginning in three-month-old mice led to the inhibition of GSK3β kinase activity, decreases in the levels of Aβ oligomers, pro-inflammatory cytokines (IL-1β, IL-6, and TNFα), and the phosphorylation of CRMP2 at Thr514, reduction of microglial and astrocyte activation, and improvement of excitatory and inhibitory synaptic transmission of pyramidal neurons in the prefrontal cortex of 3 × Tg-AD Mice. Thus, treadmill exercise reduces neuroinflammation, glial cell activation and improves synaptic transmission in the prefrontal cortex in 3 × Tg-AD mice, possibly related to the inhibition of GSK3β kinase activity.
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Affiliation(s)
- Lianwei Mu
- Department of Exercise Physiology, Guangzhou Sport University, Guangzhou 510500, China
- Key Laboratory of Physical Fitness and Exercise, Ministry of Education, Beijing Sport University, Beijing 100084, China
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA
| | - Dongdong Xia
- Key Laboratory of Physical Fitness and Exercise, Ministry of Education, Beijing Sport University, Beijing 100084, China
| | - Jiajia Cai
- Key Laboratory of Physical Fitness and Exercise, Ministry of Education, Beijing Sport University, Beijing 100084, China
| | - Boya Gu
- Key Laboratory of Physical Fitness and Exercise, Ministry of Education, Beijing Sport University, Beijing 100084, China
| | - Xiaojie Liu
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA
| | - Vladislav Friedman
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA
| | - Qing-Song Liu
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA
| | - Li Zhao
- Key Laboratory of Physical Fitness and Exercise, Ministry of Education, Beijing Sport University, Beijing 100084, China
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10
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Taylor MK, Sullivan DK, Keller JE, Burns JM, Swerdlow RH. Potential for Ketotherapies as Amyloid-Regulating Treatment in Individuals at Risk for Alzheimer’s Disease. Front Neurosci 2022; 16:899612. [PMID: 35784855 PMCID: PMC9243383 DOI: 10.3389/fnins.2022.899612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 05/30/2022] [Indexed: 12/27/2022] Open
Abstract
Alzheimer’s disease (AD) is a progressive neurodegenerative condition characterized by clinical decline in memory and other cognitive functions. A classic AD neuropathological hallmark includes the accumulation of amyloid-β (Aβ) plaques, which may precede onset of clinical symptoms by over a decade. Efforts to prevent or treat AD frequently emphasize decreasing Aβ through various mechanisms, but such approaches have yet to establish compelling interventions. It is still not understood exactly why Aβ accumulates in AD, but it is hypothesized that Aβ and other downstream pathological events are a result of impaired bioenergetics, which can also manifest prior to cognitive decline. Evidence suggests that individuals with AD and at high risk for AD have functional brain ketone metabolism and ketotherapies (KTs), dietary approaches that produce ketone bodies for energy metabolism, may affect AD pathology by targeting impaired brain bioenergetics. Cognitively normal individuals with elevated brain Aβ, deemed “preclinical AD,” and older adults with peripheral metabolic impairments are ideal candidates to test whether KTs modulate AD biology as they have impaired mitochondrial function, perturbed brain glucose metabolism, and elevated risk for rapid Aβ accumulation and symptomatic AD. Here, we discuss the link between brain bioenergetics and Aβ, as well as the potential for KTs to influence AD risk and progression.
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Affiliation(s)
- Matthew K. Taylor
- Department of Dietetics and Nutrition, University of Kansas Medical Center, Kansas City, KS, United States
- University of Kansas Alzheimer’s Disease Research Center, Fairway, KS, United States
- *Correspondence: Matthew K. Taylor,
| | - Debra K. Sullivan
- Department of Dietetics and Nutrition, University of Kansas Medical Center, Kansas City, KS, United States
- University of Kansas Alzheimer’s Disease Research Center, Fairway, KS, United States
| | - Jessica E. Keller
- Department of Dietetics and Nutrition, University of Kansas Medical Center, Kansas City, KS, United States
| | - Jeffrey M. Burns
- University of Kansas Alzheimer’s Disease Research Center, Fairway, KS, United States
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS, United States
| | - Russell H. Swerdlow
- University of Kansas Alzheimer’s Disease Research Center, Fairway, KS, United States
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS, United States
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Zhao X, Huang X, Yang C, Jiang Y, Zhou W, Zheng W. Artemisinin Attenuates Amyloid-Induced Brain Inflammation and Memory Impairments by Modulating TLR4/NF-κB Signaling. Int J Mol Sci 2022; 23:ijms23116354. [PMID: 35683033 PMCID: PMC9181281 DOI: 10.3390/ijms23116354] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 05/26/2022] [Accepted: 05/27/2022] [Indexed: 12/18/2022] Open
Abstract
The abnormal immune response is an early change in the pathogenesis of Alzheimer’s disease (AD). Microglial activation is a crucial regulator of the immune response, which contributes to progressive neuronal injury by releasing neurotoxic products. Therefore, finding effective drugs to regulate microglial homeostasis and neuroinflammation has become a new AD treatment strategy. Artemisinin has potent anti-inflammatory and immune activities. However, it is unclear whether Artemisinin contributes to the regulation of microglial activation, thereby improving AD pathology. This study found that Artemisinin significantly reduced amyloid beta-peptide 1–42 (Aβ1–42)-induced increases in nitric oxide and reactive oxygen species and inflammatory factors in BV2 cells. In addition, Artemisinin inhibited the migration of microglia and prevented the expansion of the inflammatory cascade. The mechanical studies showed Artemisinin inhibited neuroinflammation and exerted neuroprotective effects by regulating the Toll-like receptor 4 (TLR4)/Nuclear factor-kappa B (NF-κB) signaling pathway. Similar results were obtained in AD model mice, in which Artemisinin administration attenuated Aβ1–42-induced neuroinflammation and neuronal injury, reversing spatial learning and memory deficits. The anti-inflammatory effect of Artemisinin is also accompanied by the activation of the TLR4/NF-κB signaling pathway in the animal model. Our results indicate that Artemisinin attenuated Aβ1–42-induced neuroinflammation and neuronal injury by stimulating the TLR4/NF-κB signaling pathway. These findings suggest that Artemisinin is a potential therapeutic agent for AD.
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Affiliation(s)
- Xia Zhao
- Center of Reproduction, Development & Aging and Department of Pharmacology, Faculty of Health Sciences, University of Macau, Macau SAR 999078, China; (X.Z.); (C.Y.); (Y.J.); (W.Z.)
- Institute of Translation Medicine, Faculty of Health Sciences, University of Macau, Macau SAR 999078, China
- Hangzhou Medical College, Hangzhou 310000, China
| | - Xiaosu Huang
- School of Nursing, Guangdong Pharmaceutical University, Guangzhou 510006, China;
| | - Chao Yang
- Center of Reproduction, Development & Aging and Department of Pharmacology, Faculty of Health Sciences, University of Macau, Macau SAR 999078, China; (X.Z.); (C.Y.); (Y.J.); (W.Z.)
- Institute of Translation Medicine, Faculty of Health Sciences, University of Macau, Macau SAR 999078, China
| | - Yizhou Jiang
- Center of Reproduction, Development & Aging and Department of Pharmacology, Faculty of Health Sciences, University of Macau, Macau SAR 999078, China; (X.Z.); (C.Y.); (Y.J.); (W.Z.)
- Institute of Translation Medicine, Faculty of Health Sciences, University of Macau, Macau SAR 999078, China
| | - Wenshu Zhou
- Center of Reproduction, Development & Aging and Department of Pharmacology, Faculty of Health Sciences, University of Macau, Macau SAR 999078, China; (X.Z.); (C.Y.); (Y.J.); (W.Z.)
- Institute of Translation Medicine, Faculty of Health Sciences, University of Macau, Macau SAR 999078, China
| | - Wenhua Zheng
- Center of Reproduction, Development & Aging and Department of Pharmacology, Faculty of Health Sciences, University of Macau, Macau SAR 999078, China; (X.Z.); (C.Y.); (Y.J.); (W.Z.)
- Institute of Translation Medicine, Faculty of Health Sciences, University of Macau, Macau SAR 999078, China
- Correspondence: ; Tel.: +853-88224919
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12
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Smethurst P, Franklin H, Clarke BE, Sidle K, Patani R. The role of astrocytes in prion-like mechanisms of neurodegeneration. Brain 2022; 145:17-26. [PMID: 35265969 PMCID: PMC8967097 DOI: 10.1093/brain/awab366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 08/20/2021] [Accepted: 09/03/2021] [Indexed: 11/13/2022] Open
Abstract
Accumulating evidence suggests that neurodegenerative diseases are not merely neuronal in nature but comprise multicellular involvement, with astrocytes emerging as key players. The pathomechanisms of several neurodegenerative diseases involve the deposition of misfolded protein aggregates in neurons that have characteristic prion-like behaviours such as template-directed seeding, intercellular propagation, distinct conformational strains and protein-mediated toxicity. The role of astrocytes in dealing with these pathological prion-like protein aggregates and whether their responses either protect from or conspire with the disease process is currently unclear. Here we review the existing literature implicating astrocytes in multiple neurodegenerative proteinopathies with a focus on prion-like behaviour in this context.
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Affiliation(s)
- Phillip Smethurst
- Department of Neuromuscular Disease, UCL Queen Square Institute of Neurology, Queen Square, London WC1N 3BG, UK
- The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Hannah Franklin
- Department of Neuromuscular Disease, UCL Queen Square Institute of Neurology, Queen Square, London WC1N 3BG, UK
- The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Benjamin E Clarke
- Department of Neuromuscular Disease, UCL Queen Square Institute of Neurology, Queen Square, London WC1N 3BG, UK
- The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Katie Sidle
- Department of Neuromuscular Disease, UCL Queen Square Institute of Neurology, Queen Square, London WC1N 3BG, UK
- Correspondence may also be addressed to: Katie Sidle E-mail:
| | - Rickie Patani
- Department of Neuromuscular Disease, UCL Queen Square Institute of Neurology, Queen Square, London WC1N 3BG, UK
- The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
- Correspondence to: Rickie Patani The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK E-mail:
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13
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Chandramowlishwaran P, Raja S, Maheshwari A, Srinivasan S. Enteric Nervous System in Neonatal Necrotizing Enterocolitis. Curr Pediatr Rev 2022; 18:9-24. [PMID: 34503418 DOI: 10.2174/1573396317666210908162745] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 02/26/2021] [Accepted: 06/08/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND The pathophysiology of necrotizing enterocolitis (NEC) is not clear, but increasing information suggests that the risk and severity of NEC may be influenced by abnormalities in the enteric nervous system (ENS). OBJECTIVE The purpose of this review was to scope and examine the research related to ENS-associated abnormalities that have either been identified in NEC or have been noted in other inflammatory bowel disorders (IBDs) with histopathological abnormalities similar to NEC. The aim was to summarize the research findings, identify research gaps in existing literature, and disseminate them to key knowledge end-users to collaborate and address the same in future studies. METHODS Articles that met the objectives of the study were identified through an extensive literature search in the databases PubMed, EMBASE, and Scopus. RESULTS The sources identified through the literature search revealed that: (1) ENS may be involved in NEC development and post-NEC complications, (2) NEC development is associated with changes in the ENS, and (3) NEC-associated changes could be modulated by the ENS. CONCLUSION The findings from this review identify the enteric nervous as a target in the development and progression of NEC. Thus, factors that can protect the ENS can potentially prevent and treat NEC and post-NEC complications. This review serves to summarize the existing literature and highlights a need for further research on the involvement of ENS in NEC.
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Affiliation(s)
- Pavithra Chandramowlishwaran
- Department of Medicine, Emory University School of Medicine, Decatur, GA, USA.,Gastroenterology Research, Atlanta VA Medical Center, Decatur, GA, USA
| | - Shreya Raja
- Department of Medicine, Emory University School of Medicine, Decatur, GA, USA.,Gastroenterology Research, Atlanta VA Medical Center, Decatur, GA, USA
| | - Akhil Maheshwari
- Department of Pediatrics, Johns Hopkins University, Baltimore, MD, USA
| | - Shanthi Srinivasan
- Department of Medicine, Emory University School of Medicine, Decatur, GA, USA.,Gastroenterology Research, Atlanta VA Medical Center, Decatur, GA, USA
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14
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Matuszyk MM, Garwood CJ, Ferraiuolo L, Simpson JE, Staniforth RA, Wharton SB. Biological and methodological complexities of beta-amyloid peptide: Implications for Alzheimer's disease research. J Neurochem 2021; 160:434-453. [PMID: 34767256 DOI: 10.1111/jnc.15538] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 10/29/2021] [Accepted: 11/09/2021] [Indexed: 01/01/2023]
Abstract
Although controversial, the amyloid cascade hypothesis remains central to the Alzheimer's disease (AD) field and posits amyloid-beta (Aβ) as the central factor initiating disease onset. In recent years, there has been an increase in emphasis on studying the role of low molecular weight aggregates, such as oligomers, which are suggested to be more neurotoxic than fibrillary Aβ. Other Aβ isoforms, such as truncated Aβ, have also been implicated in disease. However, developing a clear understanding of AD pathogenesis has been hampered by the complexity of Aβ biochemistry in vitro and in vivo. This review explores factors contributing to the lack of consistency in experimental approaches taken to model Aβ aggregation and toxicity and provides an overview of the different techniques available to analyse Aβ, such as electron and atomic force microscopy, nuclear magnetic resonance spectroscopy, dye-based assays, size exclusion chromatography, mass spectrometry and SDS-PAGE. The review also explores how different types of Aβ can influence Aβ aggregation and toxicity, leading to variation in experimental outcomes, further highlighting the need for standardisation in Aβ preparations and methods used in current research.
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Affiliation(s)
- Martyna M Matuszyk
- Sheffield Institute for Translational Neuroscience, University of Sheffield, Sheffield, UK
| | - Claire J Garwood
- Sheffield Institute for Translational Neuroscience, University of Sheffield, Sheffield, UK
| | - Laura Ferraiuolo
- Sheffield Institute for Translational Neuroscience, University of Sheffield, Sheffield, UK
| | - Julie E Simpson
- Sheffield Institute for Translational Neuroscience, University of Sheffield, Sheffield, UK
| | | | - Stephen B Wharton
- Sheffield Institute for Translational Neuroscience, University of Sheffield, Sheffield, UK
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15
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LaRocca TJ, Cavalier AN, Roberts CM, Lemieux MR, Ramesh P, Garcia MA, Link CD. Amyloid beta acts synergistically as a pro-inflammatory cytokine. Neurobiol Dis 2021; 159:105493. [PMID: 34464705 PMCID: PMC8502211 DOI: 10.1016/j.nbd.2021.105493] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 06/08/2021] [Accepted: 08/26/2021] [Indexed: 12/12/2022] Open
Abstract
The amyloid beta (Aβ) peptide is believed to play a central role in Alzheimer's disease (AD), the most common age-related neurodegenerative disorder. However, the natural, evolutionarily selected functions of Aβ are incompletely understood. Here, we report that nanomolar concentrations of Aβ act synergistically with known cytokines to promote pro-inflammatory activation in primary human astrocytes (a cell type increasingly implicated in brain aging and AD). Using transcriptomics (RNA-seq), we show that Aβ can directly substitute for the complement component C1q in a cytokine cocktail previously shown to induce astrocyte immune activation. Furthermore, we show that astrocytes synergistically activated by Aβ have a transcriptional signature similar to neurotoxic "A1" astrocytes known to accumulate with age and in AD. Interestingly, we find that this biological action of Aβ at low concentrations is distinct from the transcriptome changes induced by the high/supraphysiological doses of Aβ often used in in vitro studies. Collectively, our results suggest an important, cytokine-like function for Aβ and a novel mechanism by which it may directly contribute to the neuroinflammation associated with brain aging and AD.
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Affiliation(s)
- Thomas J LaRocca
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America; Department of Health and Exercise Science, Center for Healthy Aging, Colorado State University (Current), Fort Collins, CO, United States of America.
| | - Alyssa N Cavalier
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America; Department of Health and Exercise Science, Center for Healthy Aging, Colorado State University (Current), Fort Collins, CO, United States of America
| | - Christine M Roberts
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America
| | - Maddie R Lemieux
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America
| | - Pooja Ramesh
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America
| | - Micklaus A Garcia
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America
| | - Christopher D Link
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, United States of America.
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16
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Calsolaro V, Matthews PM, Donat CK, Livingston NR, Femminella GD, Guedes SS, Myers J, Fan Z, Tyacke RJ, Venkataraman AV, Perneczky R, Gunn R, Rabiner EA, Gentleman S, Parker CA, Murphy PS, Wren PB, Hinz R, Sastre M, Nutt DJ, Edison P. Astrocyte reactivity with late-onset cognitive impairment assessed in vivo using 11C-BU99008 PET and its relationship with amyloid load. Mol Psychiatry 2021; 26:5848-5855. [PMID: 34267329 PMCID: PMC8758500 DOI: 10.1038/s41380-021-01193-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Revised: 05/16/2021] [Accepted: 06/08/2021] [Indexed: 02/06/2023]
Abstract
11C-BU99008 is a novel positron emission tomography (PET) tracer that enables selective imaging of astrocyte reactivity in vivo. To explore astrocyte reactivity associated with Alzheimer's disease, 11 older, cognitively impaired (CI) subjects and 9 age-matched healthy controls (HC) underwent 3T magnetic resonance imaging (MRI), 18F-florbetaben and 11C-BU99008 PET. The 8 amyloid (Aβ)-positive CI subjects had higher 11C-BU99008 uptake relative to HC across the whole brain, but particularly in frontal, temporal, medial temporal and occipital lobes. Biological parametric mapping demonstrated a positive voxel-wise neuroanatomical correlation between 11C-BU99008 and 18F-florbetaben. Autoradiography using 3H-BU99008 with post-mortem Alzheimer's brains confirmed through visual assessment that increased 3H-BU99008 binding localised with the astrocyte protein glial fibrillary acid protein and was not displaced by PiB or florbetaben. This proof-of-concept study provides direct evidence that 11C-BU99008 can measure in vivo astrocyte reactivity in people with late-life cognitive impairment and Alzheimer's disease. Our results confirm that increased astrocyte reactivity is found particularly in cortical regions with high Aβ load. Future studies now can explore how clinical expression of disease varies with astrocyte reactivity.
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Affiliation(s)
| | - Paul M Matthews
- Department of Brain Sciences, Imperial College London, London, UK
- UK Dementia Research Institute, Imperial College London, London, UK
| | - Cornelius K Donat
- Department of Brain Sciences, Imperial College London, London, UK
- Centre for Blast Injury Studies, Imperial College London, London, UK
| | | | | | | | - Jim Myers
- Department of Brain Sciences, Imperial College London, London, UK
| | - Zhen Fan
- Department of Brain Sciences, Imperial College London, London, UK
| | - Robin J Tyacke
- Department of Brain Sciences, Imperial College London, London, UK
| | | | - Robert Perneczky
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
- German Centre for Neurodegenerative Disorders (DZNE), Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
- Ageing Epidemiology Research Unit (AGE), School of Public Health, Imperial College London, London, UK
| | - Roger Gunn
- Department of Brain Sciences, Imperial College London, London, UK
- Invicro, London, UK
| | | | - Steve Gentleman
- Department of Brain Sciences, Imperial College London, London, UK
| | - Christine A Parker
- Department of Brain Sciences, Imperial College London, London, UK
- GlaxoSmithKline, Stevenage, UK
| | | | | | - Rainer Hinz
- Wolfson Molecular Imaging Centre, University of Manchester, Manchester, UK
| | - Magdalena Sastre
- Department of Brain Sciences, Imperial College London, London, UK
| | - David J Nutt
- Department of Brain Sciences, Imperial College London, London, UK
| | - Paul Edison
- Department of Brain Sciences, Imperial College London, London, UK.
- Cardiff University, Cardiff, Wales, United Kingdom.
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17
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Soltanian B, Dehghan Shasaltaneh M, Riazi GH, Masoudian N. Alteration of gene expression in reactive astrocytes induced by Aβ1-42 using low dose of methamphetamine. Mol Biol Rep 2021; 48:6103-6112. [PMID: 34374897 DOI: 10.1007/s11033-021-06629-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 08/05/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Alzheimer's disease (AD) is a degenerative brain disorder. Due to the relationship between the functional loss of astrocytes and AD, the present study aims to evaluate the effects of the low dose of methamphetamine (METH) on primary fetal human astrocytes under a stress paradigm as a possible model for AD. METHODS AND RESULTS The groups in this study included Aβ (Group 1), METH (Group 2), Aβ + METH (METH after adding Aβ for 24 h) (Group 3 as treated group), METH + Aβ (Aβ after adding METH for 24 h) (Group 4 as prevention group), and control group. Then, the gene expression of Bax, Bcl-X, PKCα, GSK3β, and Cdk5 was evaluated. In addition, phosphorylated tau, p-GSK3β, GSK3β, and GSK3α proteins were assessed by western blotting. Further, cell cycle arrest and apoptosis were checked by flow cytometry and Hoechst staining. Based on the results, the expression of GSK3β, Cdk5, and PKCα genes decreased in the prevention group, while GSK3β and Cdk5 were amplified in the treatment group. Furthermore, the level of GSK3α and GSK3β proteins in the treatment group increased, while it decreased in the prevention group. Additionally, a decrease occurred in the percentage of necrosis and early apoptosis in the treatment and prevention groups. The results of the cell cycle indicated that G1 increased, while G2 decreased in the prevention group. CONCLUSION The pure form of METH can prevent from activating GSK-3β and CdK-5, as well as enhanced activity of PKCα to inhibit phosphorylated tau protein. Therefore, a low dose of METH may have a protective effect or reducing role in the pathway of tau production in reactive astrocytes.
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Affiliation(s)
- Bita Soltanian
- Department of Biology, College of Science, Damghan Branch, Islamic Azad University, Damghan, Iran
| | | | - Gholam Hossein Riazi
- Laboratory of Neuro-Organic Chemistry, Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran
| | - Nahid Masoudian
- Department of Biology, College of Science, Damghan Branch, Islamic Azad University, Damghan, Iran
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18
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Estrada JA, Contreras I. Endocannabinoid Receptors in the CNS: Potential Drug Targets for the Prevention and Treatment of Neurologic and Psychiatric Disorders. Curr Neuropharmacol 2021; 18:769-787. [PMID: 32065105 PMCID: PMC7536826 DOI: 10.2174/1570159x18666200217140255] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/14/2019] [Accepted: 02/11/2020] [Indexed: 12/15/2022] Open
Abstract
The endocannabinoid system participates in the regulation of CNS homeostasis and functions, including neurotransmission, cell signaling, inflammation and oxidative stress, as well as neuronal and glial cell proliferation, differentiation, migration and survival. Endocannabinoids are produced by multiple cell types within the CNS and their main receptors, CB1 and CB2, are expressed in both neurons and glia. Signaling through these receptors is implicated in the modulation of neuronal and glial alterations in neuroinflammatory, neurodegenerative and psychiatric conditions, including Alzheimer’s, Parkinson’s and Huntington’s disease, multiple sclerosis, amyotrophic lateral sclerosis, stroke, epilepsy, anxiety and depression. The therapeutic potential of endocannabinoid receptors in neurological disease has been hindered by unwelcome side effects of current drugs used to target them; however, due to their extensive expression within the CNS and their involvement in physiological and pathological process in nervous tissue, they are attractive targets for drug development. The present review highlights the potential applications of the endocannabinoid system for the prevention and treatment of neurologic and psychiatric disorders.
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Affiliation(s)
- José Antonio Estrada
- Neurochemistry Laboratory, Faculty of Medicine, Universidad Autónoma del Estado de México, Toluca, Mexico
| | - Irazú Contreras
- Neurochemistry Laboratory, Faculty of Medicine, Universidad Autónoma del Estado de México, Toluca, Mexico
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19
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Preclinical Marmoset Model for Targeting Chronic Inflammation as a Strategy to Prevent Alzheimer's Disease. Vaccines (Basel) 2021; 9:vaccines9040388. [PMID: 33920929 PMCID: PMC8071309 DOI: 10.3390/vaccines9040388] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/08/2021] [Accepted: 04/13/2021] [Indexed: 11/17/2022] Open
Abstract
Due to the aging population, modern society is facing an increasing prevalence of neurological diseases such as Alzheimer’s disease (AD). AD is an age-related chronic neurodegenerative disorder for which no satisfying therapy exists. Understanding the mechanisms underlying the onset of AD is necessary to find targets for protective treatment. There is growing awareness of the essential role of the immune system in the early AD pathology. Amyloidopathy, the main feature of early-stage AD, has a deregulating effect on the immune function. This is reciprocal as the immune system also affects amyloidopathy. It seems that the inflammatory reaction shows a heterogeneous pattern depending on the stage of the disease and the variation between individuals, making not only the target but also the timing of treatment important. The lack of relevant translational animal models that faithfully reproduce clinical and pathogenic features of AD is a major cause of the delay in developing new disease-modifying therapies and their optimal timing of administration. This review describes the communication between amyloidopathy and inflammation and the possibility of using nonhuman primates as a relevant animal model for preclinical AD research.
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Lennol MP, Canelles S, Guerra-Cantera S, Argente J, García-Segura LM, de Ceballos ML, Chowen JA, Frago LM. Amyloid-β 1-40 differentially stimulates proliferation, activation of oxidative stress and inflammatory responses in male and female hippocampal astrocyte cultures. Mech Ageing Dev 2021; 195:111462. [PMID: 33609535 DOI: 10.1016/j.mad.2021.111462] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 12/24/2022]
Abstract
Alzheimer's disease (AD) is the most common form of dementia and has a higher incidence in women. The main component of the senile plaques characteristic of AD is amyloid-beta (Aβ), with surrounding astrocytes contributing to the degenerative process. We hypothesized that the sex difference in the incidence of AD could be partially due to differential astrocytic responses to Aβ. Thus, the effect of Aβ1-40 on cell viability, the inflammatory response, and oxidative status was studied in cultures of hippocampal astrocytes from male and female rats. Aβ1-40 increased astrocyte viability in both female and male cultures by activating proliferation and survival pathways. Pro-inflammatory and anti-inflammatory responses were induced in astrocytes from both sexes. Aβ1-40 did not affect endoplasmic reticulum stress although it induced oxidative stress in male and female astrocytes. Interestingly, male astrocytes had an increase in cell number and significantly lower cell death in response to Aβ1-40. Conversely, astrocytes from females displayed a greater inflammatory response after the Aβ1-40 challenge. These results suggest that the inflammatory and oxidative environment induced by Aβ1-40 in female astrocytes may contribute to enhance the vulnerability to AD and warrants further studies to unveil the mechanisms underlying sex differences in astrocytic responses.
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Affiliation(s)
- Matthew P Lennol
- Department of Paediatrics, Facultad de Medicina, Universidad Autónoma de Madrid, Arzobispo Morcillo, 4, Madrid, 28029, Spain; Department of Endocrinology, Hospital Infantil Universitario Niño Jesús, Av. Menéndez Pelayo, 65, Madrid, 28009, Spain
| | - Sandra Canelles
- Department of Endocrinology, Hospital Infantil Universitario Niño Jesús, Av. Menéndez Pelayo, 65, Madrid, 28009, Spain; Instituto de Investigación Sanitaria Princesa, IIS-IP, Madrid, Spain; Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5 Pabellón 11, Planta 0, Madrid, 28029, Spain
| | - Santiago Guerra-Cantera
- Department of Paediatrics, Facultad de Medicina, Universidad Autónoma de Madrid, Arzobispo Morcillo, 4, Madrid, 28029, Spain; Department of Endocrinology, Hospital Infantil Universitario Niño Jesús, Av. Menéndez Pelayo, 65, Madrid, 28009, Spain; Instituto de Investigación Sanitaria Princesa, IIS-IP, Madrid, Spain; Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5 Pabellón 11, Planta 0, Madrid, 28029, Spain
| | - Jesús Argente
- Department of Paediatrics, Facultad de Medicina, Universidad Autónoma de Madrid, Arzobispo Morcillo, 4, Madrid, 28029, Spain; Department of Endocrinology, Hospital Infantil Universitario Niño Jesús, Av. Menéndez Pelayo, 65, Madrid, 28009, Spain; Instituto de Investigación Sanitaria Princesa, IIS-IP, Madrid, Spain; Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5 Pabellón 11, Planta 0, Madrid, 28029, Spain; IMDEA Food Institute, CEI UAM + CSIC, Carretera de Cantoblanco 8, Madrid, 28049, Spain
| | - Luis Miguel García-Segura
- Instituto Cajal, Consejo Superior de Investigaciones Científicas (CSIC), Av. Doctor Arce, 37, Madrid, 28002, Spain; CIBER de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5 Pabellón 11, Planta 0, Madrid, 28029, Spain
| | - María L de Ceballos
- Instituto Cajal, Consejo Superior de Investigaciones Científicas (CSIC), Av. Doctor Arce, 37, Madrid, 28002, Spain; CIBER de Investigación Biomédica en Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5 Pabellón 11, Planta 0, Madrid, 28029, Spain
| | - Julie A Chowen
- Department of Endocrinology, Hospital Infantil Universitario Niño Jesús, Av. Menéndez Pelayo, 65, Madrid, 28009, Spain; Instituto de Investigación Sanitaria Princesa, IIS-IP, Madrid, Spain; Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5 Pabellón 11, Planta 0, Madrid, 28029, Spain; IMDEA Food Institute, CEI UAM + CSIC, Carretera de Cantoblanco 8, Madrid, 28049, Spain
| | - Laura M Frago
- Department of Paediatrics, Facultad de Medicina, Universidad Autónoma de Madrid, Arzobispo Morcillo, 4, Madrid, 28029, Spain; Department of Endocrinology, Hospital Infantil Universitario Niño Jesús, Av. Menéndez Pelayo, 65, Madrid, 28009, Spain; Instituto de Investigación Sanitaria Princesa, IIS-IP, Madrid, Spain; Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5 Pabellón 11, Planta 0, Madrid, 28029, Spain.
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Toral-Rios D, Patiño-López G, Gómez-Lira G, Gutiérrez R, Becerril-Pérez F, Rosales-Córdova A, León-Contreras JC, Hernández-Pando R, León-Rivera I, Soto-Cruz I, Florán-Garduño B, Campos-Peña V. Activation of STAT3 Regulates Reactive Astrogliosis and Neuronal Death Induced by AβO Neurotoxicity. Int J Mol Sci 2020; 21:ijms21207458. [PMID: 33050466 PMCID: PMC7590075 DOI: 10.3390/ijms21207458] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/23/2020] [Accepted: 09/25/2020] [Indexed: 01/03/2023] Open
Abstract
Amyloid-beta oligomers (AβO) have been proposed as the most potent neurotoxic and inflammation inducers in Alzheimer’s disease (AD). AβO contribute to AD pathogenesis by impairing the production of several cytokines and inflammation-related signaling pathways, such as the Janus kinases/signal transducer of transcription factor-3 (JAK/STAT3) pathway. STAT3 modulates glial activation, indirectly regulates Aβ deposition, and induces cognitive decline in AD transgenic models. However, in vivo studies using an AβO microinjection rat model have not yet explored STAT3 role. The main purpose of this study was to elucidate if a single microinjection of AβO could promote an increased expression of STAT3 in glial cells favoring neuroinflammation and neurodegeneration. We designed a model of intrahippocampal microinjection and assessed glial activation, cytokines production, STAT3 expression, and neurodegeneration in time. Our results showed robust expression of STAT3 in glial cells (mainly in astrocytes) and neurons, correlating with neuronal death in response to AβO administration. A STAT3 inhibition assay conducted in rat primary hippocampal cultures, suggested that the induction of the transcription factor by AβO in astrocytes leads them to an activation state that may favor neuronal death. Notwithstanding, pharmacological inhibition of the JAK2/STAT3 pathway should be focused on astrocytes because it is also essential in neurons survival. Overall, these findings strongly suggest the participation of STAT3 in the development of neurodegeneration.
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Affiliation(s)
- Danira Toral-Rios
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de Mexico 07360, Mexico; (D.T.-R.); (B.F.-G.)
| | - Genaro Patiño-López
- Laboratorio de Investigación en Inmunología y Proteómica, Hospital Infantil de México Federico Gómez, Ciudad de Mexico 06720, Mexico;
| | - Gisela Gómez-Lira
- Departamento de Farmacobiología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de Mexico 14330, Mexico; (G.G.-L.); (R.G.)
| | - Rafael Gutiérrez
- Departamento de Farmacobiología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de Mexico 14330, Mexico; (G.G.-L.); (R.G.)
| | - Fernando Becerril-Pérez
- Research Institute of Molecular Pathology (IMP), Vienna Biocenter (VBC), Campus-Vienna-BioCenter 1, 1030 Vienna, Austria;
| | - Aldebarán Rosales-Córdova
- Departamento de Administración, Facultad de Economía y Negocios, Universidad Anáhuac de México, Huixquilucan 52786, Mexico;
| | - Juan Carlos León-Contreras
- Departamento de Patología, Sección Patología Experimental, Instituto Nacional de Ciencias Médicas y Nutrición, Salvador Zubirán, Ciudad de Mexico 14080, Mexico; (J.C.L.-C.); (R.H.-P.)
| | - Rogelio Hernández-Pando
- Departamento de Patología, Sección Patología Experimental, Instituto Nacional de Ciencias Médicas y Nutrición, Salvador Zubirán, Ciudad de Mexico 14080, Mexico; (J.C.L.-C.); (R.H.-P.)
| | - Ismael León-Rivera
- Centro de Investigaciones Químicas, IICBA, Universidad Autónoma del Estado de Morelos, Cuernavaca Morelos 62210, Mexico;
| | - Isabel Soto-Cruz
- Laboratorio de Oncología Molecular, Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autónoma de México, Ciudad de Mexico 09230, Mexico;
| | - Benjamín Florán-Garduño
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de Mexico 07360, Mexico; (D.T.-R.); (B.F.-G.)
| | - Victoria Campos-Peña
- Laboratorio Experimental de Enfermedades Neurodegenerativas, Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, Ciudad de Mexico 14269, Mexico
- Correspondence: ; Tel.: +555-6063-822 (ext. 2010)
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Pinheiro L, Faustino C. Therapeutic Strategies Targeting Amyloid-β in Alzheimer's Disease. Curr Alzheimer Res 2020; 16:418-452. [PMID: 30907320 DOI: 10.2174/1567205016666190321163438] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 03/16/2019] [Accepted: 03/17/2019] [Indexed: 12/16/2022]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder linked to protein misfolding and aggregation. AD is pathologically characterized by senile plaques formed by extracellular Amyloid-β (Aβ) peptide and Intracellular Neurofibrillary Tangles (NFT) formed by hyperphosphorylated tau protein. Extensive synaptic loss and neuronal degeneration are responsible for memory impairment, cognitive decline and behavioral dysfunctions typical of AD. Amyloidosis has been implicated in the depression of acetylcholine synthesis and release, overactivation of N-methyl-D-aspartate (NMDA) receptors and increased intracellular calcium levels that result in excitotoxic neuronal degeneration. Current drugs used in AD treatment are either cholinesterase inhibitors or NMDA receptor antagonists; however, they provide only symptomatic relief and do not alter the progression of the disease. Aβ is the product of Amyloid Precursor Protein (APP) processing after successive cleavage by β- and γ-secretases while APP proteolysis by α-secretase results in non-amyloidogenic products. According to the amyloid cascade hypothesis, Aβ dyshomeostasis results in the accumulation and aggregation of Aβ into soluble oligomers and insoluble fibrils. The former are synaptotoxic and can induce tau hyperphosphorylation while the latter deposit in senile plaques and elicit proinflammatory responses, contributing to oxidative stress, neuronal degeneration and neuroinflammation. Aβ-protein-targeted therapeutic strategies are thus a promising disease-modifying approach for the treatment and prevention of AD. This review summarizes recent findings on Aβ-protein targeted AD drugs, including β-secretase inhibitors, γ-secretase inhibitors and modulators, α-secretase activators, direct inhibitors of Aβ aggregation and immunotherapy targeting Aβ, focusing mainly on those currently under clinical trials.
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Affiliation(s)
- Lídia Pinheiro
- iMed.ULisboa - Research Institute for Medicines, Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto 1649-003 Lisboa, Portugal
| | - Célia Faustino
- iMed.ULisboa - Research Institute for Medicines, Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto 1649-003 Lisboa, Portugal
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Magzoub M. Combating Proteins with Proteins: Engineering Cell-Penetrating Peptide Antagonists of Amyloid-β Aggregation and Associated Neurotoxicity. DNA Cell Biol 2020; 39:920-925. [PMID: 32379486 DOI: 10.1089/dna.2020.5604] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
A central event that underlies the etiology of Alzheimer's disease (AD) is the self-assembly of the amyloid-β (Aβ) peptide into aggregates termed amyloids. Increasing evidence implicates soluble prefibrillar Aβ oligomers in the neurodegeneration and synaptic dysfunction in AD. Recently we introduced a new class of highly promising antagonists of Aβ amyloidogenesis: designed cell-penetrating peptides (CPPs). These CPPs combine the attractive intrinsic properties of peptides (high target specificity and selectivity, biocompatibility, biodegradability, and ease and low cost of production) with potent therapeutic effects (inhibition of Aβ oligomerization, fiber formation, and neurotoxicity) and highly efficient delivery (to target cells and subcellular organelles).
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Affiliation(s)
- Mazin Magzoub
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
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24
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de Almeida SM, Ribeiro CE, Rotta I, Letendre S, Potter M, Tang B, Batistela M, Vaida F, Ellis RJ. Blood amyloid-β protein isoforms are affected by HIV-1 in a subtype-dependent pattern. J Neurovirol 2020; 26:3-13. [PMID: 31281948 PMCID: PMC6944779 DOI: 10.1007/s13365-019-00783-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 06/10/2019] [Accepted: 06/26/2019] [Indexed: 10/26/2022]
Abstract
This study aimed to compare serum amyloid processing biomarkers among HIV subtype B (n = 25), HIV subtype C (n = 26), healthy HIV-negative controls (n = 18), and patients with Alzheimer's disease (AD; n = 24). Immunoassays were used to measure main soluble Aβ isoforms Aβ38, Aβ40, Aβ42, and Aβ-total in serum and cerebrospinal fluid (CSF). People living with HIV (PLWH) and HIV(-) samples, including AD samples, were compared for gender and age, while HIV subtypes were compared for nadir CD4 and plasma viral load suppression. CSF/serum ratios of Aβ40, Aβ42, and Aβ-total were lower in HIV-1C group than in HIV-1B group (p = 0.020, 0.025, and 0.050, respectively). In serum, these biomarkers were comparable. Serum Aβ isoforms were significantly lower in PLWH than in AD. Serum Aβ42 levels in PLWH were decreased compared to those in control group, thus similar to Aβ42 alterations in CSF; these results were different from those observed in AD. Impaired cellular immunity, low CD4 cell count (nadir or current) influences serum Aβ metabolism in HIV-1B but not HIV-1C. However, in PLWH overall, but not in individual HIV subtype groups, greater CD4 recovery, calculated as the difference between current and nadir CD4, correlated with Aβ42/Aβ40 ratio in serum (rs 0.246; p = 0.0479). No significant correlation was found with global deficit score (GDS), an index of neurocognitive performance, age, or duration of infection. These findings are consistent with those of subtype-dependent amyloid processing in blood in chronic HIV disease.
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Affiliation(s)
- Sérgio M de Almeida
- Hospital de Clínicas - UFPR, Seção de Virologia, Setor Análises Clínicas Rua Padre Camargo, Universidade Federal do Paraná, Curitiba, Paraná, 80060-240, Brazil.
| | - Clea E Ribeiro
- Hospital de Clínicas - UFPR, Seção de Virologia, Setor Análises Clínicas Rua Padre Camargo, Universidade Federal do Paraná, Curitiba, Paraná, 80060-240, Brazil
| | - Indianara Rotta
- Hospital de Clínicas - UFPR, Seção de Virologia, Setor Análises Clínicas Rua Padre Camargo, Universidade Federal do Paraná, Curitiba, Paraná, 80060-240, Brazil
| | | | | | - Bin Tang
- University of California San Diego, San Diego, CA, USA
| | - Meiri Batistela
- Hospital de Clínicas - UFPR, Seção de Virologia, Setor Análises Clínicas Rua Padre Camargo, Universidade Federal do Paraná, Curitiba, Paraná, 80060-240, Brazil
| | - Florin Vaida
- University of California San Diego, San Diego, CA, USA
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Abstract
The symptoms of Alzheimer disease reflect a loss of neural circuit integrity in the brain, but neurons do not work in isolation. Emerging evidence suggests that the intricate balance of interactions between neurons, astrocytes, microglia and vascular cells required for healthy brain function becomes perturbed during the disease, with early changes likely protecting neural circuits from damage, followed later by harmful effects when the balance cannot be restored. Moving beyond a neuronal focus to understand the complex cellular interactions in Alzheimer disease and how these change throughout the course of the disease may provide important insight into developing effective therapeutics.
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26
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Frost GR, Jonas LA, Li YM. Friend, Foe or Both? Immune Activity in Alzheimer's Disease. Front Aging Neurosci 2019; 11:337. [PMID: 31920620 PMCID: PMC6916654 DOI: 10.3389/fnagi.2019.00337] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 11/21/2019] [Indexed: 12/18/2022] Open
Abstract
Alzheimer's disease (AD) is marked by the presence of amyloid beta (Aβ) plaques, neurofibrillary tangles (NFT), neuronal death and synaptic loss, and inflammation in the brain. AD research has, in large part, been dedicated to the understanding of Aβ and NFT deposition as well as to the pharmacological reduction of these hallmarks. However, recent GWAS data indicates neuroinflammation plays a critical role in AD development, thereby redirecting research efforts toward unveiling the complexities of AD-associated neuroinflammation. It is clear that the innate immune system is intimately associated with AD progression, however, the specific roles of glia and neuroinflammation in AD pathology remain to be described. Moreover, inflammatory processes have largely been painted as detrimental to AD pathology, when in fact, many immune mechanisms such as phagocytosis aid in the reduction of AD pathologies. In this review, we aim to outline the delicate balance between the beneficial and detrimental aspects of immune activation in AD as a more thorough understanding of these processes is critical to development of effective therapeutics for AD.
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Affiliation(s)
- Georgia R Frost
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, Manhattan, NY, United States
| | - Lauren A Jonas
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, Manhattan, NY, United States.,Pharmacology Program, Weill Cornell Graduate School of Medical Sciences, Cornell University, Ithaca, NY, United States
| | - Yue-Ming Li
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, Manhattan, NY, United States.,Pharmacology Program, Weill Cornell Graduate School of Medical Sciences, Cornell University, Ithaca, NY, United States
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27
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Panayiotou E, Fella E, Andreou S, Papacharalambous R, Gerasimou P, Costeas P, Angeli S, Kousiappa I, Papacostas S, Kyriakides T. C5aR agonist enhances phagocytosis of fibrillar and non-fibrillar Aβ amyloid and preserves memory in a mouse model of familial Alzheimer's disease. PLoS One 2019; 14:e0225417. [PMID: 31809505 PMCID: PMC6897413 DOI: 10.1371/journal.pone.0225417] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 11/03/2019] [Indexed: 12/22/2022] Open
Abstract
According to the amyloid hypothesis of Alzheimer's disease (AD) the deposition of prefibrillar and fibrillar Aβ peptide sets off the pathogenic cascades of neuroinflammation and neurodegeneration that lead to synaptic and neuronal loss resulting in cognitive decline. Various approaches to reduce amyloid load by reducing production of the Aβ peptide or enhancing amyloid clearance by primary or secondary immunization have not proven successful in clinical trials. Interfering with the normal function of secretases and suboptimal timing of Aβ peptide removal have been put forward as possible explanations. Complement, an innate component of the immune system, has been found to modulate disease pathology and in particular neuronal loss in the AD mouse model but its mechanism of action is complex. C1Q has been shown to facilitate phagocytosis of Aβ peptide but its Ablation attenuates neuroinflammation. Experiments in AD mouse models show that inhibition of complement component C5a reduces amyloid deposition and alleviates neuroinflammation. Phagocytes including microglia, monocytes and neutrophils carry C5a receptors. Here, a widely used mouse model of AD, 5XFAD, was intermittently treated with the oral C5a receptor agonist EP67 and several neuronal and neuroinflammatory markers as well as memory function were assessed. EP67 treatment enhanced phagocytosis, resulting in a significant reduction of both fibrillar and non-fibrillar Aβ, reduced astrocytosis and preserved synaptic and neuronal markers as well as memory function. Timely and phasic recruitment of the innate immune system offers a new therapeutic avenue of treating pre-symptomatic Alzheimer disease.
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Affiliation(s)
- Elena Panayiotou
- Neurology Clinic A, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Eleni Fella
- Cyprus School of Molecular Medicine, Nicosia, Cyprus
| | | | | | | | | | - Stella Angeli
- Cyprus School of Molecular Medicine, Nicosia, Cyprus
| | - Ioanna Kousiappa
- Neurology Clinic B, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Savvas Papacostas
- Cyprus School of Molecular Medicine, Nicosia, Cyprus
- Neurology Clinic B, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Theodoros Kyriakides
- Neurology Clinic A, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
- Cyprus School of Molecular Medicine, Nicosia, Cyprus
- * E-mail:
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Thellung S, Corsaro A, Bosio AG, Zambito M, Barbieri F, Mazzanti M, Florio T. Emerging Role of Cellular Prion Protein in the Maintenance and Expansion of Glioma Stem Cells. Cells 2019; 8:cells8111458. [PMID: 31752162 PMCID: PMC6912268 DOI: 10.3390/cells8111458] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/12/2019] [Accepted: 11/13/2019] [Indexed: 02/07/2023] Open
Abstract
Cellular prion protein (PrPC) is a membrane-anchored glycoprotein representing the physiological counterpart of PrP scrapie (PrPSc), which plays a pathogenetic role in prion diseases. Relatively little information is however available about physiological role of PrPC. Although PrPC ablation in mice does not induce lethal phenotypes, impairment of neuronal and bone marrow plasticity was reported in embryos and adult animals. In neurons, PrPC stimulates neurite growth, prevents oxidative stress-dependent cell death, and favors antiapoptotic signaling. However, PrPC activity is not restricted to post-mitotic neurons, but promotes cell proliferation and migration during embryogenesis and tissue regeneration in adult. PrPC acts as scaffold to stabilize the binding between different membrane receptors, growth factors, and basement proteins, contributing to tumorigenesis. Indeed, ablation of PrPC expression reduces cancer cell proliferation and migration and restores cell sensitivity to chemotherapy. Conversely, PrPC overexpression in cancer stem cells (CSCs) from different tumors, including gliomas—the most malignant brain tumors—is predictive for poor prognosis, and correlates with relapses. The mechanisms of the PrPC role in tumorigenesis and its molecular partners in this activity are the topic of the present review, with a particular focus on PrPC contribution to glioma CSCs multipotency, invasiveness, and tumorigenicity.
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Affiliation(s)
- Stefano Thellung
- Sezione di Farmacologia, Dipartimento di Medicina Interna & Centro di Eccellenza per la Ricerca Biomedica (CEBR), Università di Genova, 16132 Genova, Italy; (S.T.); (A.C.); (A.G.B.); (M.Z.); (F.B.)
| | - Alessandro Corsaro
- Sezione di Farmacologia, Dipartimento di Medicina Interna & Centro di Eccellenza per la Ricerca Biomedica (CEBR), Università di Genova, 16132 Genova, Italy; (S.T.); (A.C.); (A.G.B.); (M.Z.); (F.B.)
| | - Alessia G. Bosio
- Sezione di Farmacologia, Dipartimento di Medicina Interna & Centro di Eccellenza per la Ricerca Biomedica (CEBR), Università di Genova, 16132 Genova, Italy; (S.T.); (A.C.); (A.G.B.); (M.Z.); (F.B.)
| | - Martina Zambito
- Sezione di Farmacologia, Dipartimento di Medicina Interna & Centro di Eccellenza per la Ricerca Biomedica (CEBR), Università di Genova, 16132 Genova, Italy; (S.T.); (A.C.); (A.G.B.); (M.Z.); (F.B.)
| | - Federica Barbieri
- Sezione di Farmacologia, Dipartimento di Medicina Interna & Centro di Eccellenza per la Ricerca Biomedica (CEBR), Università di Genova, 16132 Genova, Italy; (S.T.); (A.C.); (A.G.B.); (M.Z.); (F.B.)
| | - Michele Mazzanti
- Dipartimento di Bioscienze, Università di Milano, 20133 Milano, Italy
- Correspondence: (T.F.); (M.M.); Tel.: +39-01-0353-8806 (T.F.); +39-02-5031-4958 (M.M.)
| | - Tullio Florio
- Sezione di Farmacologia, Dipartimento di Medicina Interna & Centro di Eccellenza per la Ricerca Biomedica (CEBR), Università di Genova, 16132 Genova, Italy; (S.T.); (A.C.); (A.G.B.); (M.Z.); (F.B.)
- IRCCS Ospedale Policlinico San Martino, 16132 Genova, Italy
- Correspondence: (T.F.); (M.M.); Tel.: +39-01-0353-8806 (T.F.); +39-02-5031-4958 (M.M.)
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Lee J, Cho E, Kwon H, Jeon J, Jung CJ, Moon M, Jun M, Lee YC, Kim DH, Jung JW. The fruit of Crataegus pinnatifida ameliorates memory deficits in β-amyloid protein-induced Alzheimer's disease mouse model. JOURNAL OF ETHNOPHARMACOLOGY 2019; 243:112107. [PMID: 31349027 DOI: 10.1016/j.jep.2019.112107] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 07/19/2019] [Accepted: 07/22/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The fruit of Crataegus pinnatifida is a traditional medicine widely used as digestive drug in East Asia. Although Chinese herbal medicine used it for mental health, scientific evidence does not exist, yet. AIMS OF STUDY The aim of this study is to show that the ethanol extract of the fruit of Crataegus pinnatifida (CPE) has neuroprotective effect on Alzheimer' disease model mice. MATERIALS AND METHODS Intracerebroventricular injection of Aβ was used to induce Alzheimer's disease-like pathology. Passive avoidance and Y-maze tasks were used to examine the effect of CPE on memory impairments by Aβ. Immunohistochemistry was used to examine the effect of CPE on glial activation. ThT assay was used to observe the effect of CPE on Aβ aggregation. MTT and LDH release assays were utilized to examine effects of CPE on Aβ-induced cytotoxicity. RESULTS CPE prevented memory deficit in Aβ-induced memory impairment model. Moreover, CPE prevented glial activation in the hippocampus of Aβ-injected model. In in vitro test, CPE inhibited Aβ fibril formation in a concentration-dependent manner. CPE also caused disaggregation of Aβ fibrils. Along with this, CPE blocked neuronal cell death induced by Aβ. CONCLUSIONS Collectively, these experimental findings demonstrated that CPE could be a candidate for development of AD therapy.
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Affiliation(s)
- Jihye Lee
- Division of Endocrinology, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea.
| | - Eunbi Cho
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan, 49315, Republic of Korea.
| | - Huiyoung Kwon
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan, 49315, Republic of Korea.
| | - Jieun Jeon
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan, 49315, Republic of Korea.
| | - Chul Jong Jung
- Okchundang Corporation, 142 Yulam-ro, Dong-gu, Dae-gu, Republic of Korea.
| | - Minho Moon
- Department of Biochemistry, College of Medicine, Konyang University, Daejeon, 35365, South Korea.
| | - Mira Jun
- Department of Food Science and Nutrition, College of Health Sciences, Dong-A University, Busan, 49315, South Korea; Institute of Convergence Bio-Health, Dong-A University, Busan, 49315, Republic of Korea.
| | - Young Choon Lee
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan, 49315, Republic of Korea; Institute of Convergence Bio-Health, Dong-A University, Busan, 49315, Republic of Korea.
| | - Dong Hyun Kim
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan, 49315, Republic of Korea; Institute of Convergence Bio-Health, Dong-A University, Busan, 49315, Republic of Korea.
| | - Ji Wook Jung
- Division of Bio-technology and Convergence, College of Bio-industry, Daegu Haany University, Kyungsan, 38578, Republic of Korea.
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Xing S, Pan N, Xu W, Zhang J, Li J, Dang C, Liu G, Pei Z, Zeng J. EphrinB2 activation enhances angiogenesis, reduces amyloid-β deposits and secondary damage in thalamus at the early stage after cortical infarction in hypertensive rats. J Cereb Blood Flow Metab 2019; 39:1776-1789. [PMID: 29624118 PMCID: PMC6727142 DOI: 10.1177/0271678x18769188] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cerebral infarction causes secondary neurodegeneration and angiogenesis in thalamus, which impacts functional recovery after stroke. Here, we hypothesize that activation of ephrinB2 could stimulate angiogenesis and restore the secondary neurodegeneration in thalamus after cerebral infarction. Focal cerebral infarction was induced by middle cerebral artery occlusion (MCAO). Secondary damage, angiogenesis, amyloid-β (Aβ) deposits, levels of ephrinB2 and receptor for advanced glycation end product (RAGE) in the ipsilateral thalamus were determined by immunofluorescence and immunoblot. The contribution of ephrinB2 to angiogenesis was determined by siRNA-mediated knockdown of ephrinB2 and pharmacological activation of ephrinB2. The results showed that formation of new vessels and ephrinB2 expression was markedly increased in the ipsilateral thalamus at seven days after MCAO. EphrinB2 knockdown markedly suppressed angiogenesis coinciding with increased Aβ accumulation, neuronal loss and gliosis in the ipsilateral thalamus. In contrast, clustered EphB2-Fc significantly enhanced angiogenesis, alleviated Aβ accumulation and the secondary thalamic damage, which was accompanied by accelerated function recovery. Additionally, activation of ephrinB2 significantly reduced RAGE levels in the ipsilateral thalamus. Our findings suggest that activation of ephrinB2 promotes angiogenesis, ameliorates Aβ accumulation and the secondary thalamic damage after cerebral infarction. Additionally, RAGE might be involved in Aβ clearance by activating ephrinB2 in the thalamus.
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Affiliation(s)
- Shihui Xing
- 1 Department of Neurology and Stroke Center, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Nannan Pan
- 2 Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, China
| | - Wei Xu
- 1 Department of Neurology and Stroke Center, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Jian Zhang
- 1 Department of Neurology and Stroke Center, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Jingjing Li
- 1 Department of Neurology and Stroke Center, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Chao Dang
- 1 Department of Neurology and Stroke Center, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Gang Liu
- 1 Department of Neurology and Stroke Center, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Zhong Pei
- 1 Department of Neurology and Stroke Center, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Jinsheng Zeng
- 1 Department of Neurology and Stroke Center, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
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Ozansoy M, Coşkun E, Çetin Ozansoy MB, Çankaya Ş, Günal MY, Bayraktaroğlu Z, Yuluğ B, Hanoğlu L. Lazer aksotomi sonrası primer kortikal nöron kültüründe rifampisinin nöronal hücre sağkalımı üzerine etkisi. ACTA MEDICA ALANYA 2019. [DOI: 10.30565/medalanya.553846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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De Simone A, Naldi M, Tedesco D, Milelli A, Bartolini M, Davani L, Widera D, Dallas ML, Andrisano V. Investigating in Vitro Amyloid Peptide 1-42 Aggregation: Impact of Higher Molecular Weight Stable Adducts. ACS OMEGA 2019; 4:12308-12318. [PMID: 31460348 PMCID: PMC6682006 DOI: 10.1021/acsomega.9b01531] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 07/05/2019] [Indexed: 05/21/2023]
Abstract
The self-assembly of amyloid peptides (Aβ), in particular Aβ1-42, into oligomers and fibrils is one of the main pathological events related to Alzheimer's disease. Recent studies have demonstrated the ability of carbon monoxide-releasing molecules (CORMs) to protect neurons and astrocytes from Aβ1-42 toxicity. In fact, CORMs are able to carry and release controlled levels of CO and are known to exert a wide range of anti-inflammatory and anti-apoptotic activities at physiologically relevant concentrations. In order to investigate the direct effects of CORMs on Aβ1-42, we studied the reactivity of CORM-2 and CORM-3 with Aβ1-42 in vitro and the potential inhibition of its aggregation by mass spectrometry (MS), as well as fluorescence and circular dichroism spectroscopies. The application of an electrospray ionization-MS (ESI-MS) method allowed the detection of stable Aβ1-42/CORMs adducts, involving the addition of the Ru(CO)2 portion of CORMs at histidine residues on the Aβ1-42 skeleton. Moreover, CORMs showed anti-aggregating properties through formation of stable adducts with Aβ1-42 as demonstrated by a thioflavin T fluorescence assay and MS analysis. As further proof, comparison of the CD spectra of Aβ1-42 recorded in the absence and in the presence of CORM-3 at a 1:1 molar ratio showed the ability of CORM-3 to stabilize the peptide in its soluble, unordered conformation, thereby preventing its misfolding and aggregation. This multi-methodological investigation revealed novel interactions between Aβ1-42 and CORMs, contributing new insights into the proposed neuroprotective mechanisms mediated by CORMs and disclosing a new strategy to divert amyloid aggregation and toxicity.
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Affiliation(s)
- Angela De Simone
- Department
for Life Quality Studies, Alma Mater Studiorum
Università di Bologna, Rimini 47921, Italy
| | - Marina Naldi
- Department
of Pharmacy and Biotechnology, Alma Mater
Studiorum Università di Bologna, Bologna 40126, Italy
- Center
for Applied Biomedical Research (C.R.B.A.) S. Orsola-Malpighi Hospital, Bologna 40126, Italy
| | - Daniele Tedesco
- Department
of Pharmacy and Biotechnology, Alma Mater
Studiorum Università di Bologna, Bologna 40126, Italy
| | - Andrea Milelli
- Department
for Life Quality Studies, Alma Mater Studiorum
Università di Bologna, Rimini 47921, Italy
| | - Manuela Bartolini
- Department
of Pharmacy and Biotechnology, Alma Mater
Studiorum Università di Bologna, Bologna 40126, Italy
| | - Lara Davani
- Department
for Life Quality Studies, Alma Mater Studiorum
Università di Bologna, Rimini 47921, Italy
| | - Darius Widera
- Reading
School of Pharmacy, University of Reading, Reading RG6 6UB, U.K.
| | - Mark L. Dallas
- Reading
School of Pharmacy, University of Reading, Reading RG6 6UB, U.K.
| | - Vincenza Andrisano
- Department
for Life Quality Studies, Alma Mater Studiorum
Università di Bologna, Rimini 47921, Italy
- E-mail:
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Neprilysin in the Cerebrospinal Fluid and Serum of Patients Infected With HIV1-Subtypes C and B. J Acquir Immune Defic Syndr 2019; 78:248-256. [PMID: 29481488 DOI: 10.1097/qai.0000000000001666] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Neprilysin (NEP) is the dominant Aβ peptide-degrading enzyme in the brain. HIV-1 subtype B transactivator of transcription protein is known to interfere with NEP function, but whether this is true of HIV-1C transactivator of transcription, which has a defective chemokine motif, is not known. This study aimed to analyze the impact of HIV subtype on NEP-mediated cleavage of Aβ by comparing cerebrospinal fluid (CSF) and serum levels of NEP between HIV+ (27 patients with HIV-1B and 26 with HIV-1C), healthy HIV- controls (n = 13), and patients with Alzheimer disease (n = 24). METHODS NEP and Aβ oligomers 38, 40, 42 levels were measured in CSF and serum by immunoassays. Ratios between NEP and Aβ-38, 40, 42, and total were calculated in CSF and serum. Comparisons between HIV(+) and HIV(-) were adjusted by linear regression for sex and age; HIV subtype comparisons were adjusted for nadir CD4 and plasma viral load suppression. RESULTS Levels of NEP and ratios in CSF were comparable for HIV-1C and B subtypes. The ratio of serum NEP/Aβ-40 was lower for HIV1-C than HIV1-B (P = 0.032). The CSF/serum index of NEP/Aβ-40, NEP/Aβ-42, and NEP/Aβ-total were lower for HIV1-B than HIV1-C (P = 0.008, 0.005, and 0.017, respectively), corroborating the findings for serum. CSF NEP was comparable for HIV+, HIV-, and AD. CONCLUSION There was impact of HIV subtype on NEP. The ratio of NEP/Aβ-40 on serum was lower on HIV1-C than HIV1-B. These results are consistent with the results of CSF Aβ-42 levels decreased in HIV1-C compared with HIV1-B, suggesting higher amyloid β deposit on HIV1-C than HIV1-B.
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Nichols MR, St-Pierre MK, Wendeln AC, Makoni NJ, Gouwens LK, Garrad EC, Sohrabi M, Neher JJ, Tremblay ME, Combs CK. Inflammatory mechanisms in neurodegeneration. J Neurochem 2019; 149:562-581. [PMID: 30702751 DOI: 10.1111/jnc.14674] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 12/21/2018] [Accepted: 01/28/2019] [Indexed: 12/28/2022]
Abstract
This review discusses the profound connection between microglia, neuroinflammation, and Alzheimer's disease (AD). Theories have been postulated, tested, and modified over several decades. The findings have further bolstered the belief that microglia-mediated inflammation is both a product and contributor to AD pathology and progression. Distinct microglia phenotypes and their function, microglial recognition and response to protein aggregates in AD, and the overall role of microglia in AD are areas that have received considerable research attention and yielded significant results. The following article provides a historical perspective of microglia, a detailed discussion of multiple microglia phenotypes including dark microglia, and a review of a number of areas where microglia intersect with AD and other pathological neurological processes. The overall breadth of important discoveries achieved in these areas significantly strengthens the hypothesis that neuroinflammation plays a key role in AD. Future determination of the exact mechanisms by which microglia respond to, and attempt to mitigate, protein aggregation in AD may lead to new therapeutic strategies.
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Affiliation(s)
- Michael R Nichols
- Department of Chemistry & Biochemistry, University of Missouri-St. Louis, St. Louis, Missouri, USA
| | - Marie-Kim St-Pierre
- Axe Neurosciences, Centre de Recherche du CHU de Québec-Université Laval, Québec, Quebec, Canada.,Département de médecine moléculaire, Université Laval, Québec, Quebec, Canada
| | - Ann-Christin Wendeln
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany.,Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Nyasha J Makoni
- Department of Chemistry & Biochemistry, University of Missouri-St. Louis, St. Louis, Missouri, USA
| | - Lisa K Gouwens
- Department of Chemistry & Biochemistry, University of Missouri-St. Louis, St. Louis, Missouri, USA
| | - Evan C Garrad
- Department of Chemistry & Biochemistry, University of Missouri-St. Louis, St. Louis, Missouri, USA
| | - Mona Sohrabi
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, North Dakota, USA
| | - Jonas J Neher
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany.,Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Marie-Eve Tremblay
- Axe Neurosciences, Centre de Recherche du CHU de Québec-Université Laval, Québec, Quebec, Canada.,Département de médecine moléculaire, Université Laval, Québec, Quebec, Canada
| | - Colin K Combs
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, North Dakota, USA
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35
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Yousefi N, Sotoodehnejadnematalahi F, Heshmati-Fakhr N, Sayyah M, Hoseini M, Ghassemi S, Aliakbari S, Pourbadie HG. Prestimulation of Microglia Through TLR4 Pathway Promotes Interferon Beta Expression in a Rat Model of Alzheimer's Disease. J Mol Neurosci 2019; 67:495-503. [PMID: 30610591 DOI: 10.1007/s12031-018-1249-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 12/21/2018] [Indexed: 10/27/2022]
Abstract
Soluble amyloid beta (Aβ) oligomers are the most common forms of Aβ in the early stage of Alzheimer's disease (AD). They are highly toxic to the neurons but their capability to activate microglia remains controversial. Microglia develop two distinct phenotypes, classic (M1) and alternative (M2). Tuning of microglia to the alternative (anti-inflammatory) state is of major interest in treatment of neuroinflammatory disease. This study aimed to assess tuning the microglia to produce interferon beta (IFN-β) as an anti-inflammatory cytokine through TLR4 pathway in a rat model of AD. Microglial BV-2 cells were treated with 1 μg/ml lipopolysaccharides (LPS), Monophosphoryl lipid A (MPL), or vehicles for 24 h, and then incubated with Aβ oligomer. After 24 h, cell pellets were harvested and TIR-domain-containing adapter-inducing interferon-β (TRIF), interferon regulatory factor 3 (IRF3), and IFN-β levels were measured. The ligands/vehicle were microinjected into the right ventricle of male Wistar rats every 3 days. Two weeks later, an osmotic pump filled with oligomeric Aβ/vehicle was implanted in the left ventricle. After 2 weeks, TRIF, IRF3, and IFN-β levels were measured in the hippocampal tissue. TNF-α and IFN-β levels were assessed in the hippocampus using immunohistochemistry. The oligomeric Aβ did not change TRIF, IRF3, and IFN-β levels in both cell culture and hippocampal tissue. However, pretreatment with LPS or MPL increased the level of these proteins. BV-2 cells morphologically express M1 state in presence of higher dose of Aβ oligomer (10 μM). Pretreatment with LPS or MPL decreased the TNF-α and increased the number of IFN-β positive cells in the hippocampus of Aβ-treated rats. In conclusion, pretreatment with low dose TLR4 agonists could induce microglia to produce neuroprotective cytokines including IFN-β which may be considered as a potential strategy to combat neuronal degeneration in AD.
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Affiliation(s)
- Niloufar Yousefi
- Department of Physiology and Pharmacology, Pasteur Institute of Iran, Tehran, Iran.,Department of Biology, School of Basic Science, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | | | - Nooshin Heshmati-Fakhr
- Department of Biology, School of Basic Science, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Mohammad Sayyah
- Department of Physiology and Pharmacology, Pasteur Institute of Iran, Tehran, Iran
| | - Masoud Hoseini
- Department of Pharmacodynamy and Toxicology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Soheil Ghassemi
- Department of Physiology and Pharmacology, Pasteur Institute of Iran, Tehran, Iran
| | - Shayan Aliakbari
- Department of Physiology and Pharmacology, Pasteur Institute of Iran, Tehran, Iran
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36
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Illouz T, Madar R, Biragyn A, Okun E. Restoring microglial and astroglial homeostasis using DNA immunization in a Down Syndrome mouse model. Brain Behav Immun 2019; 75:163-180. [PMID: 30389461 PMCID: PMC6358279 DOI: 10.1016/j.bbi.2018.10.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 09/22/2018] [Accepted: 10/23/2018] [Indexed: 12/20/2022] Open
Abstract
Down Syndrome (DS), the most common cause of genetic intellectual disability, is characterized by over-expression of the APP and DYRK1A genes, located on the triplicated chromosome 21. This chromosomal abnormality leads to a cognitive decline mediated by Amyloid-β (Aβ) overproduction and tau hyper-phosphorylation as early as the age of 40. In this study, we used the Ts65Dn mouse model of DS to evaluate the beneficial effect of a DNA vaccination against the Aβ1-11 fragment, in ameliorating Aβ-related neuropathology and rescue of cognitive and behavioral abilities. Anti-Aβ1-11 vaccination induced antibody production and facilitated clearance of soluble oligomers and small extracellular inclusions of Aβ from the hippocampus and cortex of Ts65Dn mice. This was correlated with reduced neurodegeneration and restoration of the homeostatic phenotype of microglial and astroglial cells. Vaccinated Ts65Dn mice performed better in spatial-learning tasks, exhibited reduced motor hyperactivity typical for this strain, and restored short-term memory abilities. Our findings support the hypothesis that DS individuals may benefit from active immunotherapy against Aβ from a young age by slowing the progression of dementia.
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Affiliation(s)
- Tomer Illouz
- The Leslie and Susan Gonda Multidisciplinary Brain Research Center, Bar-Ilan University, Ramat Gan 5290002, Israel; The Paul Feder Laboratory on Alzheimer's Disease Research, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Ravit Madar
- The Leslie and Susan Gonda Multidisciplinary Brain Research Center, Bar-Ilan University, Ramat Gan 5290002, Israel; The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan 5290002, Israel; The Paul Feder Laboratory on Alzheimer's Disease Research, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Arya Biragyn
- Laboratory of Molecular Biology and Immunology, NIA, NIH, MD 21224, USA
| | - Eitan Okun
- The Leslie and Susan Gonda Multidisciplinary Brain Research Center, Bar-Ilan University, Ramat Gan 5290002, Israel; The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan 5290002, Israel; The Paul Feder Laboratory on Alzheimer's Disease Research, Bar-Ilan University, Ramat Gan 5290002, Israel.
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37
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Wang T, Chen J, Hou Y, Yu Y, Wang B. BAP31 deficiency contributes to the formation of amyloid‐β plaques in Alzheimer's disease by reducing the stability of RTN3. FASEB J 2018; 33:4936-4946. [DOI: 10.1096/fj.201801702r] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Tianyi Wang
- College of Life Science and HealthNortheastern University Shenyang China
| | - Jing Chen
- College of Life Science and HealthNortheastern University Shenyang China
| | - Yue Hou
- College of Life Science and HealthNortheastern University Shenyang China
| | - Yang Yu
- College of Life Science and HealthNortheastern University Shenyang China
| | - Bing Wang
- College of Life Science and HealthNortheastern University Shenyang China
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38
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Shentu YP, Hu WT, Zhang Q, Huo Y, Liang JW, Liuyang ZY, Zhou H, Wei H, Ke D, Wang XC, Wang JZ, Man HY, Westermarck J, Liu R. CIP2A-promoted astrogliosis induces AD-like synaptic degeneration and cognitive deficits. Neurobiol Aging 2018; 75:198-208. [PMID: 30594047 DOI: 10.1016/j.neurobiolaging.2018.11.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 11/22/2018] [Accepted: 11/27/2018] [Indexed: 10/27/2022]
Abstract
Reactive astrogliosis and early synaptic degeneration are 2 characteristic hallmarks in Alzheimer's disease (AD) brains, but a direct link between the 2 events has not been established. Here, we show that cancerous inhibitor of PP2A (CIP2A), a cancerous protein with high expression level in astrocytes, is upregulated in patients with AD and 3xTg-AD transgenic mice. Overexpression of CIP2A in astrocytes through adeno-associated virus infection both in cultured cells and in mice brains results in activation of astrocytes, increased production of cytokines and Aβ, and synaptic degeneration indicated by decreased levels of synaptic proteins, spine loss, and impairment in long-term potentiation. As a result of synaptic degeneration, CIP2A overexpression in astrocytes in vivo induces significant deficits in visual episodic memory detected by novel objective recognition test and spatial memory detected by Morris water maze. We conclude that CIP2A-promoted astrogliosis induces synaptic degeneration and cognitive deficits in AD.
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Affiliation(s)
- Yang-Ping Shentu
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wen-Ting Hu
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qing Zhang
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuda Huo
- Department of Biology, Boston University, Boston, USA
| | - Jia-Wei Liang
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhen-Yu Liuyang
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huan Zhou
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hui Wei
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dan Ke
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiao-Chuan Wang
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jian-Zhi Wang
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Heng-Ye Man
- Department of Biology, Boston University, Boston, USA
| | - Jukka Westermarck
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland
| | - Rong Liu
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; The Institute for Brain Research, Collaborative Innovation Center for Brain Science, Huazhong University of Science and Technology, Wuhan, China.
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39
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Triggering microglia through toll-like receptor 2 pathway induced interferon β expression in cell and animal model of Alzheimer’s disease. Neuroreport 2018; 29:1456-1462. [DOI: 10.1097/wnr.0000000000001132] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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40
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Sarkaki A, Farbood Y, Badavi M, Ghadiri A, Ghasemi Dehcheshmeh M, Mansouri E, Navabi SP. The protective effect of betulinic acid on microvascular responsivity and protein expression in alzheimer disease induced by cerebral micro-injection of beta-amyloid and streptozotocin. Microcirculation 2018; 25:e12503. [PMID: 30178892 DOI: 10.1111/micc.12503] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 07/19/2018] [Accepted: 08/30/2018] [Indexed: 12/23/2022]
Abstract
OBJECTIVE Alzheimer's disease (AD) is mainly caused by accumulation of β-amyloid (Aβ) in vessels or parenchyma of the brain. Accordingly, natural compounds such as betulinic acid (BA) might improve the AD signs by increase in blood flow and through reduction in amyloid plaques. METHODS Intra-hippocampal injection of BA (0.2 and 0.4 μmol/L /10 μL DMSO /rat) was done at intervals of 180 and 10 min before co-microinjection of 0.1 μmol/L Aβ dissolved in PBS (5 μL/rat, hippocampi) and 1.5 mg/kg Streptozotocin dissolved in aCSF (10 μL/rat, lateral ventricles). Cerebro-vascular responsivity tested by Laser Doppler, BBB leakage, Elisa assays of cytokines (TNF-α and IL-10), and Western blot analysis of proteins (BDNF and AchE) in the hippocampus were assessed 1 month after the injections. RESULTS Microvascular reaction and BBB function were significantly impaired in AD rats, which were improved via BA pretreatment. BA could increase BDNF expression and decrease cytokine levels in the hippocampus of AD rats (especially 0.1 μmol/L Aβ: 0.4 μmol/L BA); however, no significant changes were detected in the blotting of AchE among the groups. CONCLUSIONS Betulinic acid could have a role in AD through protecting microcirculation, alleviating inflammation, and up-regulating BDNF expression which is clearer toward 1:4 molar ratios of Aβ to BA.
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Affiliation(s)
- Alireza Sarkaki
- Department of Physiology, Faculty of Medicine, Physiology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Yaghoob Farbood
- Department of Physiology, Faculty of Medicine, Physiology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohammad Badavi
- Department of Physiology, Faculty of Medicine, Physiology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Ata Ghadiri
- Cellular & Molecular Research Center, Department of Anatomical Sciences, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Immunology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | | | - Esrafil Mansouri
- Cellular & Molecular Research Center, Department of Anatomical Sciences, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Seyedeh Parisa Navabi
- Department of Physiology, Faculty of Medicine, Physiology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Anti-neuroinflammatory effects of SLOH in Aβ-induced BV-2 microglial cells and 3xTg-AD mice involve the inhibition of GSK-3β. Neurosci Lett 2018; 687:207-215. [PMID: 30278248 DOI: 10.1016/j.neulet.2018.09.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 09/06/2018] [Accepted: 09/27/2018] [Indexed: 01/14/2023]
Abstract
Neuroinflammation has been observed in post-mortem Alzheimer's disease (AD) brains which could be due to Aβ interacting with microglia and astrocytes. SLOH, a carbazole-based fluorophore, was shown to bind to Aβ peptides. Herein, we investigated the anti-neuroinflammatory effects of SLOH using a BV-2 microglial cell model and a triple transgenic AD (3xTg-AD) mouse model. BV-2 cells were incubated with Aβ in the presence of SLOH for 24 h. The levels of pro-inflammatory and anti-inflammatory cytokines were determined. Moreover, 3xTg-AD mice were administrated with SLOH (2 mg kg-1) for one month. The mice were then sacrificed and the brains were used to assess the levels of pro-inflammatory, anti-inflammatory cytokines and the activation of ionized calcium-binding adapter molecule 1 (Iba1). BV-2 cell studies suggested that SLOH reduced the production and mRNA levels of pro-inflammatory cytokines TNF-α, IL-1β, COX-2, iNOS, and increased IL-10. Animal study confirmed that SLOH reduced the production of pro-inflammatory cytokines and increased the level of anti-inflammatory cytokine. Moreover, SLOH inhibited the activity of GSK-3β. In 3xTg-AD mouse model, SLOH treatment significantly decreased the number of Iba1-positive cells in mouse brains. Our results demonstrated that SLOH significantly attenuated the neuroinflammation through down-regulating the activity of GSK-3β.
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42
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Tang M, Pi J, Long Y, Huang N, Cheng Y, Zheng H. Quantum dots-based sandwich immunoassay for sensitive detection of Alzheimer's disease-related Aβ 1-42. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 201:82-87. [PMID: 29734108 DOI: 10.1016/j.saa.2018.04.060] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 04/12/2018] [Accepted: 04/29/2018] [Indexed: 05/24/2023]
Abstract
Amyloid-beta peptide 1-42 (Aβ1-42) is known as a component of amyloid plaques in association with Alzheimer's disease. Herein, we developed a reliable and remarkably sensitive sandwich immunoassay to detect the Aβ1-42 using quantum dots (QDs) as fluorescent label. In the presence of Aβ1-42, the biotinylated Anti-beta Amyloid 1-16 (N-Ab) recognized the target and formed C-Ab-Aβ1-42-N-Ab sandwich immunocomplexes. Then Streptavidin-QDs conjugated to biotinylated N-Ab and the concentration of Aβ1-42 was determined by detecting the fluorescence intensity in the supernatant. This method is faster and more efficient than the previous approach we reported. It also has reasonable sensitivity and selectivity. Under the optimized conditions, the linear range is 5.0 to 100 pM (0.023-0.45 ng/mL) and the detection limit is 1.7 pM (7.6 pg/ mL). In addition, this method has been successfully applied to detect the Aβ1-42 in human cerebrospinal fluid sample.
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Affiliation(s)
- Menghuan Tang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Jiangli Pi
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Yijuan Long
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Ning Huang
- Department of Neurosurgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, PR China
| | - Yuan Cheng
- Department of Neurosurgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, PR China
| | - Huzhi Zheng
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
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Tufail S, Sherwani MA, Shoaib S, Azmi S, Owais M, Islam N. Ovalbumin self-assembles into amyloid nanosheets that elicit immune responses and facilitate sustained drug release. J Biol Chem 2018; 293:11310-11324. [PMID: 29853634 PMCID: PMC6065171 DOI: 10.1074/jbc.ra118.002550] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 05/14/2018] [Indexed: 11/06/2022] Open
Abstract
Amyloids are associated with many neurodegenerative diseases, motivating investigations into their structure and function. Although not linked to a specific disease, albumins have been reported to form many structural aggregates. We were interested in investigating host immune responses to amyloid fibrils assembled from the model protein ovalbumin. Surprisingly, upon subjecting ovalbumin to standard denaturing conditions, we encountered giant protein nanosheets harboring amyloid-like features and hypothesized that these nanosheets might have potential in clinical or therapeutic applications. We found that the nanosheets, without the administration of any additional adjuvant, evoked a strong antibody response in mice that was higher than that observed for native ovalbumin. This suggests that amyloid nanosheets have a self-adjuvanting property. The nanosheet-induced immune response was helper T cell 2 (Th2) biased and negligibly inflammatory. While testing whether the nanosheets might form depots for the sustained release of precursor proteins, we did observe release of ovalbumin that mimicked the conformation of native protein. Moreover, the nanosheets could load the anticancer drug doxorubicin and release it in a slow and sustained manner. Taken together, our results suggest that amyloid nanosheets should be further investigated as either an antigen delivery vehicle or a multifunctional antigen and drug co-delivery system, with potential applications in simultaneous immunotherapy and chemotherapy.
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Affiliation(s)
- Saba Tufail
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, Uttar Pradesh 202002, India; Biochemistry Section, Women's College, Aligarh Muslim University, Aligarh, Uttar Pradesh 202002, India.
| | - Mohd Asif Sherwani
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama 35294
| | - Shoaib Shoaib
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, Uttar Pradesh 202002, India
| | - Sarfuddin Azmi
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, Uttar Pradesh 202002, India
| | - Mohammad Owais
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, Uttar Pradesh 202002, India
| | - Najmul Islam
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, Uttar Pradesh 202002, India.
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44
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Park J, Wetzel I, Marriott I, Dréau D, D'Avanzo C, Kim DY, Tanzi RE, Cho H. A 3D human triculture system modeling neurodegeneration and neuroinflammation in Alzheimer's disease. Nat Neurosci 2018; 21:941-951. [PMID: 29950669 PMCID: PMC6800152 DOI: 10.1038/s41593-018-0175-4] [Citation(s) in RCA: 389] [Impact Index Per Article: 64.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 05/25/2018] [Indexed: 01/26/2023]
Abstract
Alzheimer's disease (AD) is characterized by beta-amyloid accumulation, phosphorylated tau formation, hyperactivation of glial cells, and neuronal loss. The mechanisms of AD pathogenesis, however, remain poorly understood, partially due to the lack of relevant models that can comprehensively recapitulate multistage intercellular interactions in human AD brains. Here we present a new three-dimensional (3D) human AD triculture model using neurons, astrocytes, and microglia in a 3D microfluidic platform. Our model provided key representative AD features: beta-amyloid aggregation, phosphorylated tau accumulation, and neuroinflammatory activity. In particular, the model mirrored microglial recruitment, neurotoxic activities such as axonal cleavage, and NO release damaging AD neurons and astrocytes. Our model will serve to facilitate the development of more precise human brain models for basic mechanistic studies in neural-glial interactions and drug discovery.
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Affiliation(s)
- Joseph Park
- Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, NC, USA.,Center for Biomedical Engineering and Science, University of North Carolina at Charlotte, Charlotte, NC, USA.,Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC, USA.,The Nanoscale Science Program, University of North Carolina at Charlotte, Charlotte, NC, USA.,Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Isaac Wetzel
- Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, NC, USA.,Center for Biomedical Engineering and Science, University of North Carolina at Charlotte, Charlotte, NC, USA.,Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC, USA.,The Nanoscale Science Program, University of North Carolina at Charlotte, Charlotte, NC, USA
| | - Ian Marriott
- Center for Biomedical Engineering and Science, University of North Carolina at Charlotte, Charlotte, NC, USA.,Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC, USA
| | - Didier Dréau
- Center for Biomedical Engineering and Science, University of North Carolina at Charlotte, Charlotte, NC, USA.,Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC, USA
| | - Carla D'Avanzo
- Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Doo Yeon Kim
- Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Rudolph E Tanzi
- Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Hansang Cho
- Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, NC, USA. .,Center for Biomedical Engineering and Science, University of North Carolina at Charlotte, Charlotte, NC, USA. .,Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC, USA. .,The Nanoscale Science Program, University of North Carolina at Charlotte, Charlotte, NC, USA.
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45
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Montoliu-Gaya L, Mulder SD, Herrebout MA, Baayen JC, Villegas S, Veerhuis R. Aβ-oligomer uptake and the resulting inflammatory response in adult human astrocytes are precluded by an anti-Aβ single chain variable fragment in combination with an apoE mimetic peptide. Mol Cell Neurosci 2018; 89:49-59. [DOI: 10.1016/j.mcn.2018.03.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 03/30/2018] [Accepted: 03/31/2018] [Indexed: 10/17/2022] Open
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46
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Muñoz Y, Paula-Lima AC, Núñez MT. Reactive oxygen species released from astrocytes treated with amyloid beta oligomers elicit neuronal calcium signals that decrease phospho-Ser727-STAT3 nuclear content. Free Radic Biol Med 2018; 117:132-144. [PMID: 29309895 DOI: 10.1016/j.freeradbiomed.2018.01.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 12/19/2017] [Accepted: 01/04/2018] [Indexed: 02/06/2023]
Abstract
The transcription factor STAT3 has a crucial role in the development and maintenance of the nervous system. In this work, we treated astrocytes with oligomers of the amyloid beta peptide (AβOs), which display potent synaptotoxic activity, and studied the effects of mediators released by AβOs-treated astrocytes on the nuclear location of neuronal serine-727-phosphorylated STAT3 (pSerSTAT3). Treatment of mixed neuron-astrocyte cultures with 0.5µMAβOs induced in neurons a significant decrease of nuclear pSerSTAT3, but not of phosphotyrosine-705 STAT3, the other form of STAT3 phosphorylation. This decrease did not occur in astrocyte-poor neuronal cultures revealing a pivotal role for astrocytes in this response. To test if mediators released by astrocytes in response to AβOs induce pSerSTAT3 nuclear depletion, we used conditioned medium derived from AβOs-treated astrocyte cultures. Treatment of astrocyte-poor neuronal cultures with this medium caused pSerSTAT3 nuclear depletion but did not modify overall STAT3 levels. Extracellular catalase prevented the pSerSTAT3 nuclear depletion caused by astrocyte-conditioned medium, indicating that reactive oxygen species (ROS) mediate this response. This conditioned medium also increased neuronal oxidative tone, leading to a ryanodine-sensitive intracellular calcium signal that proved to be essential for pSerSTAT3 nuclear depletion. In addition, this depletion decreased BCL2 and Survivin transcription and significantly increased BAX/BCL2 ratio. This is the first description that ROS generated by AβOs-treated astrocytes and neuronal calcium signals jointly regulate pSerSTAT3 nuclear distribution in neurons. We propose that astrocytes release ROS in response to AβOs, which by increasing neuronal oxidative tone, generate calcium signals that cause pSerSTAT3 nuclear depletion and loss of STAT3 protective transcriptional activity.
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Affiliation(s)
- Yorka Muñoz
- Department of Biology, Faculty of Sciences,Universidad de Chile, Santiago, Chile
| | - Andrea C Paula-Lima
- Institute for Research in Dental Sciences, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.
| | - Marco T Núñez
- Department of Biology, Faculty of Sciences,Universidad de Chile, Santiago, Chile.
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47
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Yulug B, Hanoglu L, Ozansoy M, Isık D, Kilic U, Kilic E, Schabitz WR. Therapeutic role of rifampicin in Alzheimer's disease. Psychiatry Clin Neurosci 2018; 72:152-159. [PMID: 29315976 DOI: 10.1111/pcn.12637] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/06/2017] [Accepted: 12/17/2017] [Indexed: 12/11/2022]
Abstract
Rifampicin exerts significant brain protective functions in multiple experimental models. Here we summarize the underlying mechanisms of the neuroprotective and pro-cognitive effects of rifampicin that are mediated by its anti-inflammatory, anti-tau, anti-amyloid, and cholinergic effects. Beyond suggesting that rifampicin shows strong brain protective effects in preclinical models of Alzheimer's disease, we also provide substantial clinical evidence for the neuroprotective and pro-cognitive effects of rifampicin. Future neuroimaging studies combined with clinical assessment scores are the following steps to be taken in this field of research.
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Affiliation(s)
- Burak Yulug
- Department of Neurology, Istanbul Medipol University, Istanbul, Turkey.,Department of Restorative and Regenerative Medicine, Istanbul Medipol University, Istanbul, Turkey
| | - Lütfü Hanoglu
- Department of Neurology, Istanbul Medipol University, Istanbul, Turkey.,Department of Restorative and Regenerative Medicine, Istanbul Medipol University, Istanbul, Turkey
| | - Mehmet Ozansoy
- Department of Restorative and Regenerative Medicine, Istanbul Medipol University, Istanbul, Turkey.,Department of Physiology, International School of Medicine, Istanbul Medipol University, Istanbul, Turkey
| | - Dogan Isık
- Department of Psychiatry, Istanbul Medipol University, Istanbul, Turkey
| | - Ulkan Kilic
- Department of Medical Biology, Faculty of Medicine, University of Health Sciences, Istanbul, Turkey
| | - Ertugrul Kilic
- Department of Restorative and Regenerative Medicine, Istanbul Medipol University, Istanbul, Turkey.,Department of Physiology, International School of Medicine, Istanbul Medipol University, Istanbul, Turkey
| | - Wolf Rüdiger Schabitz
- Department of Neurology, Bethel, EVKB, Bielefeld, University of Münster, Münster, Germany
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48
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de Almeida SM, Ribeiro CE, Rotta I, Piovesan M, Tang B, Vaida F, Raboni SM, Letendre S, Potter M, Batistela Fernandes MS, Ellis RJ. Biomarkers of neuronal injury and amyloid metabolism in the cerebrospinal fluid of patients infected with HIV-1 subtypes B and C. J Neurovirol 2018; 24:28-40. [PMID: 29063514 PMCID: PMC5792298 DOI: 10.1007/s13365-017-0591-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 10/09/2017] [Accepted: 10/11/2017] [Indexed: 12/13/2022]
Abstract
Based on prior reports that the HIV-1 Tat protein modulates amyloid-beta (Aβ) metabolism, this study aimed to compare CSF neural injury biomarkers between 27 patients with HIV subtype B, 26 patients with HIV subtype C, 18 healthy HIV-negative controls, and 24 patients with Alzheimer's disease (AD). Immunoassays were used to measure soluble amyloid precursor protein α and β (sAPPα, sAPPβ), Aβ oligomers 38, 40, 42, and Aβ-total; phosphorylated tau (P-tau181), and total tau (T-tau). Comparisons between HIV(+) and HIV(-) (including AD) were adjusted by linear regression for gender and age; HIV subtype comparisons were adjusted for nadir CD4 and plasma viral load suppression. The p values were corrected for multiple testing with the Benjamini-Hochberg procedure. CSF Aβ-42 and Hulstaert (P-tau181) index were lower in HIV1-C than B (p = 0.03, and 0.049 respectively); subtypes did not differ on other CSF biomarkers or ratios. Compared to AD, HIV(+) had lower CSF levels of T-tau, P-tau181 (p < 0.001), and sAPPα (p = 0.041); HIV(+) had higher CSF Aβ-42 (p = 0.002) and higher CSF indexes: [Aß-42/(240 + 1.18 T-tau)], P-tau181/Aβ-42, T-tau/Aβ-42, P-tau181/T-tau, sAPPα/β (all p ≤ 0.01) than AD. Compared to HIV(-), HIV(+) had lower CSF Aβ-42, and T-tau (all p ≤ 0.004). As conclusion, amyloid metabolism was influenced by HIV infection in a subtype-dependent manner. Aß-42 levels were lower in HIV1-C than B, suggesting that there may be greater deposition of Aß-42 in HIV1-C. These findings are supported by CSF Hulstaert (P-tau181) index. Differences between HIV and AD in the patterns of Aß and Tau biomarkers suggest that CNS HIV infection and AD may not share some of same mechanisms of neuronal injury.
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Affiliation(s)
- Sérgio Monteiro de Almeida
- Hospital de Clínicas-UFPR, Universidade Federal do Paraná, Seção de Virologia, Setor Análises Clínicas, Rua Padre Camargo, 280, Curitiba, PR, 80060-240, Brazil.
- Faculdades Pequeno Príncipe, Curitiba, Paraná, Brazil.
- Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, Paraná, Brazil.
| | - Clea E Ribeiro
- Hospital de Clínicas-UFPR, Universidade Federal do Paraná, Seção de Virologia, Setor Análises Clínicas, Rua Padre Camargo, 280, Curitiba, PR, 80060-240, Brazil
| | - Indianara Rotta
- Hospital de Clínicas-UFPR, Universidade Federal do Paraná, Seção de Virologia, Setor Análises Clínicas, Rua Padre Camargo, 280, Curitiba, PR, 80060-240, Brazil
- Faculdades Pequeno Príncipe, Curitiba, Paraná, Brazil
- Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, Paraná, Brazil
| | - Mauro Piovesan
- Hospital de Clínicas-UFPR, Universidade Federal do Paraná, Seção de Virologia, Setor Análises Clínicas, Rua Padre Camargo, 280, Curitiba, PR, 80060-240, Brazil
| | - Bin Tang
- HNRC-University of California-San Diego, San Diego, CA, USA
| | - Florin Vaida
- HNRC-University of California-San Diego, San Diego, CA, USA
| | - Sonia Mara Raboni
- Hospital de Clínicas-UFPR, Universidade Federal do Paraná, Seção de Virologia, Setor Análises Clínicas, Rua Padre Camargo, 280, Curitiba, PR, 80060-240, Brazil
| | - Scott Letendre
- HNRC-University of California-San Diego, San Diego, CA, USA
| | - Michael Potter
- HNRC-University of California-San Diego, San Diego, CA, USA
| | - Meire S Batistela Fernandes
- Hospital de Clínicas-UFPR, Universidade Federal do Paraná, Seção de Virologia, Setor Análises Clínicas, Rua Padre Camargo, 280, Curitiba, PR, 80060-240, Brazil
| | - Ronald J Ellis
- HNRC-University of California-San Diego, San Diego, CA, USA
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SLOH, a carbazole-based fluorophore, mitigates neuropathology and behavioral impairment in the triple-transgenic mouse model of Alzheimer's disease. Neuropharmacology 2018; 131:351-363. [PMID: 29309769 DOI: 10.1016/j.neuropharm.2018.01.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 12/08/2017] [Accepted: 01/02/2018] [Indexed: 01/23/2023]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative dysfunction characterized by memory impairment and brings a heavy burden to old people both in developing and developed countries. Amyloid hypothesis reveals that aggregation and deposition of amyloid plaques are the cause of AD neurodegeneration. SLOH, a carbazole-based fluorophore, is reported to inhibit amyloid beta (Aβ) aggregation in vitro. In the current study, we intended to evaluate the protective effect of SLOH in a triple transgenic AD mouse model (3xTg-AD). 3xTg-AD (10-month-old) were treated with SLOH (0.5, 1 and 2 mg kg-1) for one month via intraperitoneal injection. After treatment, cognitive function was assessed by Morris Water Maze (MWM) and Y-maze tasks. In addition, biochemical estimations were used to examine the degree of Aβ deposition, tau hyperphosphorylation and neuroinflammation in the brains of 3xTg-AD mice. An in vitro study was conducted on human neuroblastoma (SH-SY5Y) cells to determine the activity of SLOH on tau and GSK-3β using western blot and immunofluorescence staining. One month treatment with SLOH significantly ameliorated memory impairments in 3xTg-AD mice in MWM and Y-maze tests. Moreover, SLOH treatment mitigated the level of amyloid plaques, tau hyperphosphorylation and neuroinflammation in the mouse brain. SLOH also reduced tau hyperphosphorylation and down-regulated GSK-3β activity in Aβ induced neurotoxic SH-SY5Y cells. The promising results in mitigating amyloid plaques, tau hyperphosphorylation, neuroinflammation and ameliorating cognitive deficits following one-month treatment suggest that SLOH could be a potential multi-target molecule for the AD treatment.
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50
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Jha MK, Kim JH, Song GJ, Lee WH, Lee IK, Lee HW, An SSA, Kim S, Suk K. Functional dissection of astrocyte-secreted proteins: Implications in brain health and diseases. Prog Neurobiol 2017; 162:37-69. [PMID: 29247683 DOI: 10.1016/j.pneurobio.2017.12.003] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 10/23/2017] [Accepted: 12/08/2017] [Indexed: 02/07/2023]
Abstract
Astrocytes, which are homeostatic cells of the central nervous system (CNS), display remarkable heterogeneity in their morphology and function. Besides their physical and metabolic support to neurons, astrocytes modulate the blood-brain barrier, regulate CNS synaptogenesis, guide axon pathfinding, maintain brain homeostasis, affect neuronal development and plasticity, and contribute to diverse neuropathologies via secreted proteins. The identification of astrocytic proteome and secretome profiles has provided new insights into the maintenance of neuronal health and survival, the pathogenesis of brain injury, and neurodegeneration. Recent advances in proteomics research have provided an excellent catalog of astrocyte-secreted proteins. This review categorizes astrocyte-secreted proteins and discusses evidence that astrocytes play a crucial role in neuronal activity and brain function. An in-depth understanding of astrocyte-secreted proteins and their pathways is pivotal for the development of novel strategies for restoring brain homeostasis, limiting brain injury/inflammation, counteracting neurodegeneration, and obtaining functional recovery.
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Affiliation(s)
- Mithilesh Kumar Jha
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University School of Medicine, Daegu, Republic of Korea; Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Jong-Heon Kim
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University School of Medicine, Daegu, Republic of Korea
| | - Gyun Jee Song
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University School of Medicine, Daegu, Republic of Korea
| | - Won-Ha Lee
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea
| | - In-Kyu Lee
- Department of Internal Medicine, Division of Endocrinology and Metabolism, Kyungpook National University School of Medicine, Daegu, Republic of Korea
| | - Ho-Won Lee
- Department of Neurology, Brain Science and Engineering Institute, Kyungpook National University School of Medicine, Daegu, Republic of Korea
| | - Seong Soo A An
- Department of BioNano Technology, Gachon University, Gyeonggi-do, Republic of Korea
| | - SangYun Kim
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Gyeonggi-do, Republic of Korea
| | - Kyoungho Suk
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University School of Medicine, Daegu, Republic of Korea.
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