1
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Chen Y, Huang X, Chen H, Yi C. An easy-to-perform method for microvessel isolation and primary brain endothelial cell culture to study Alzheimer's disease. Heliyon 2024; 10:e33077. [PMID: 38994107 PMCID: PMC11238044 DOI: 10.1016/j.heliyon.2024.e33077] [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: 04/09/2024] [Revised: 06/13/2024] [Accepted: 06/13/2024] [Indexed: 07/13/2024] Open
Abstract
Dysfunction of the blood-brain barrier (BBB) has been increasingly recognised as a critical early event in Alzheimer's disease (AD) pathophysiology. Central to this mechanism is the impaired function of brain endothelial cells (BECs), the primary structural constituents of the BBB, the study of which is imperative for understanding AD pathophysiology. However, the published methods to isolate BECs are time-consuming and have a low success rate. Here, we developed a rapid and streamlined protocol for BEC isolation without using transgenic reporters, flow cytometry, and magnetic beads, which are essential for existing methods. Using this novel protocol, we isolated high-purity BECs from cell clusters of cortical microvessels from wild-type and APPswe/PS1dE9 (APP/PS1, a classical AD model) mice at 2, 4 and 9 months of age. Reduced levels of tight junction proteins Claudin-5 and Zonula Occludens-1, as well as glucose transporter 1, were observed in the isolated cortical microvessels from APP/PS1 mice and amyloid-β (Aβ) oligomer-treated BECs from wild-type mice. Trans-well permeability assay showed increased FITC-dextran leakage in BECs treated with Aβ, suggesting impaired BBB permeability. BECs obtained using our novel protocol can undergo various experimental analyses, including immunofluorescence staining, western blotting, real-time PCR, and trans-well permeability assay. In conclusion, our novel protocol represents a reliable and valuable tool for in vitro modelling BBB to study AD-related mechanisms and develop targeted therapeutic strategies.
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Affiliation(s)
- Yang Chen
- Research Centre, Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Xiaomin Huang
- Research Centre, Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Hui Chen
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Chenju Yi
- Research Centre, Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
- Shenzhen Key Laboratory of Chinese Medicine Active Substance Screening and Translational Research, Shenzhen, 518107, China
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Guangzhou, China
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2
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Prasanth MI, Verma K, Brimson S, Tencomnao T, Brimson JM. Simple ammonium salt and sigma-1 receptor ligand dipentylammonium provides neuroprotective effects in cell culture and Caenorhabditis elegans models of Alzheimer's disease. Biomed Pharmacother 2024; 173:116455. [PMID: 38503234 DOI: 10.1016/j.biopha.2024.116455] [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: 01/02/2024] [Revised: 03/08/2024] [Accepted: 03/15/2024] [Indexed: 03/21/2024] Open
Abstract
The sigma-1 receptor (σ-1R), a chaperone protein located at the mitochondria-associated membrane (MAM) of the endoplasmic reticulum, can interact with and modify the signaling pathways of various proteins, thereby modulating many disease pathologies, including Alzheimer's disease (AD). The σ-1R ligand dipentylammonium (DPA) was analyzed for its anti-AD properties using PC12 cells (in vitro) and Caenorhabditis elegans (in vivo) models along with molecular docking (in silico) analysis. DPA at 1 and 10 µM concentrations was able to significantly potentiate NGF-induced neurite growth length by 137.7 ± 12.0 and 187.8 ± 16.4, respectively, when compared to the control 76.9 ± 7.4. DPA also regulated neurite damage caused by Aβ(25-35) treatment in differentiated PC12 cells by improving cell viability and neurite length. In C. elegans, DPA could significantly extend the median and maximum lifespan of Aβ transgenic strain CL2006 without impacting wild-type nematodes. Additionally, it could significantly reduce the paralysis phenotype of another Aβ transgenic strain, CL4176, thereby improving the overall health in AD pathogenesis. This effect depended on σ-1R, as DPA could not modulate the lifespan of σ-1R mutant TM3443. This was further confirmed using agonist PRE084 and antagonist BD1047, wherein the agonist alone could extend the lifespan of CL2006, while the antagonist suppressed the effect of DPA in CL2006. Interestingly, neither had an TM3443. Further, molecular docking analysis showed that DPA had a similar binding affinity as that of PRE084, BD1047 and pentazocine against the σ-1R receptor in humans and C. elegans, which collectively suggests the anti-AD properties of DPA.
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Affiliation(s)
- Mani Iyer Prasanth
- Natural Products for Neuroprotection and Anti-ageing Research Unit, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok 10330, Thailand; Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok 10330, Thailand
| | - Kanika Verma
- Natural Products for Neuroprotection and Anti-ageing Research Unit, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok 10330, Thailand; Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok 10330, Thailand; Department of Molecular Epidemiology, ICMR-National Institute of Malaria Research (NIMR), New Delhi 110077, India
| | - Sirikalaya Brimson
- Department of Clinical Microscopy, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok 10330, Thailand
| | - Tewin Tencomnao
- Natural Products for Neuroprotection and Anti-ageing Research Unit, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok 10330, Thailand; Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok 10330, Thailand.
| | - James Michael Brimson
- Natural Products for Neuroprotection and Anti-ageing Research Unit, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok 10330, Thailand; Research Unit for Innovation and International Affairs, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok 10330, Thailand.
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3
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Hamano S, Noguchi T, Asai Y, Ito R, Komatsu R, Sato T, Inoue A, Maruyama T, Kudo TA, Hirata Y, Shindo S, Uchida Y, Hwang GW, Matsuzawa A. Aggregability of the SQSTM1/p62-based aggresome-like induced structures determines the sensitivity to parthanatos. Cell Death Discov 2024; 10:74. [PMID: 38346947 PMCID: PMC10861449 DOI: 10.1038/s41420-024-01838-2] [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: 11/24/2023] [Revised: 01/28/2024] [Accepted: 01/30/2024] [Indexed: 02/15/2024] Open
Abstract
Overactivation of poly (ADP-ribose) polymerase-1 (PARP-1) triggers a noncanonical form of programmed cell death (PCD) called parthanatos, yet the mechanisms of its induction are not fully understood. We have recently demonstrated that the aggresome-like induced structures (ALIS) composed of the autophagy receptor SQSTM1/p62 and K48-linked polyubiquitinated proteins (p62-based ALIS) mediate parthanatos. In this study, we identified the D1 dopamine receptor agonist YM435 as a unique parthanatos inhibitor that acts as the disaggregating agent for the p62-based ALIS. We found that YM435 structurally reduces aggregability of the ALIS, and then increases its hydrophilicity and liquidity, which prevents parthanatos. Moreover, dopamine and L-DOPA, a dopamine precursor, also prevented parthanatos by reducing the aggregability of the ALIS. Together, these observations suggest that aggregability of the p62-based ALIS determines the sensitivity to parthanatos, and the pharmacological properties of YM435 that reduces the aggregability may be suitable for therapeutic drugs for parthanatos-related diseases such as neurodegenerative diseases.
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Affiliation(s)
- Shuhei Hamano
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Takuya Noguchi
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan.
| | - Yukino Asai
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Ryo Ito
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Ryuto Komatsu
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Tetsu Sato
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Aya Inoue
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Tomoe Maruyama
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Tada-Aki Kudo
- Division of Oral Physiology, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Yusuke Hirata
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Sawako Shindo
- Laboratory of Environmental and Health Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
- Department of Environmental Toxicology, Meiji Pharmaceutical University, Tokyo, Japan
| | - Yasuo Uchida
- Department of Molecular Systems Pharmaceutics, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Gi-Wook Hwang
- Laboratory of Environmental and Health Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Atsushi Matsuzawa
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan.
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4
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Kurakin S, Badreeva D, Dushanov E, Shutikov A, Efimov S, Timerova A, Mukhametzyanov T, Murugova T, Ivankov O, Mamatkulov K, Arzumanyan G, Klochkov V, Kučerka N. Arrangement of lipid vesicles and bicelle-like structures formed in the presence of Aβ(25-35) peptide. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2024; 1866:184237. [PMID: 37820938 DOI: 10.1016/j.bbamem.2023.184237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 08/31/2023] [Accepted: 10/03/2023] [Indexed: 10/13/2023]
Abstract
Our complementary experimental data and molecular dynamics (MD) simulations results reveal the structure of previously observed lipid bicelle-like structures (BLSs) formed in the presence of amyloid-beta peptide Aβ(25-35) below the main phase transition temperature (Tm) of saturated phosphatidylcholine lipids and small unilamellar vesicles (SUVs) above this temperature. First, we show by using solid-state 31P nuclear magnetic resonance (NMR) spectroscopy that our BLSs being in the lipid gel phase demonstrate magnetic alignment along the magnetic field of NMR spectrometer and undergo a transition to SUVs in the lipid fluid phase when heated through the Tm. Secondly, thanks to the BLS alignment we present their lipid structure. Lipids are found located not only in the flat bilayered part but also around its perimeter, which is corroborated by the results of coarse-grained (CG) MD simulations. Finally, peptides appear to mix randomly with lipids in SUVs while assuming predominantly unordered secondary structures revealed by circular dichroism (CD), Raman spectroscopy, and all-atom MD simulations. Importantly, the former is changing little when the system undergoes morphological transitions between BLSs and SUVs. Our structural results then offer a platform for studying and understanding mechanisms of morphological transformations caused by the disruptive effect of amyloid-beta peptides on the lipid bilayer.
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Affiliation(s)
- Sergei Kurakin
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna, Moscow Region 141980, Russia; Institute of Physics, Kazan Federal University, Kremlevskaya 18, Kazan 420008, Russia.
| | - Dina Badreeva
- Meshcheryakov Laboratory of Information Technologies, Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna, Moscow Region 141980, Russia
| | - Ermuhammad Dushanov
- Laboratory of Radiation Biology, Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna, Moscow Region 141980, Russia
| | - Artyom Shutikov
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna, Moscow Region 141980, Russia
| | - Sergey Efimov
- Institute of Physics, Kazan Federal University, Kremlevskaya 18, Kazan 420008, Russia
| | - Ayzira Timerova
- Institute of Physics, Kazan Federal University, Kremlevskaya 18, Kazan 420008, Russia
| | - Timur Mukhametzyanov
- Butlerov Chemistry Institute, Kazan Federal University, Kremlevskaya 18, Kazan 420008, Russia
| | - Tatiana Murugova
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna, Moscow Region 141980, Russia
| | - Oleksandr Ivankov
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna, Moscow Region 141980, Russia
| | - Kahramon Mamatkulov
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna, Moscow Region 141980, Russia
| | - Grigory Arzumanyan
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna, Moscow Region 141980, Russia
| | - Vladimir Klochkov
- Institute of Physics, Kazan Federal University, Kremlevskaya 18, Kazan 420008, Russia
| | - Norbert Kučerka
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna, Moscow Region 141980, Russia; Department of Physical Chemistry of Drugs, Faculty of Pharmacy, Comenius University Bratislava, Odbojárov 10, Bratislava 832 32, Slovakia.
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5
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Jafni S, Sathya S, Arunkumar M, Kiruthiga C, Jeyakumar M, Murugesh E, Devi KP. Hesperidin Methyl Chalcone reduces extracellular Aβ (25-35) peptide aggregation and fibrillation and also protects Neuro 2a cells from Aβ (25-35) induced neuronal dysfunction. Bioorg Med Chem 2023; 96:117536. [PMID: 38016411 DOI: 10.1016/j.bmc.2023.117536] [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: 08/29/2023] [Revised: 11/11/2023] [Accepted: 11/16/2023] [Indexed: 11/30/2023]
Abstract
In the present study, we evaluated the neuroprotective potential of Hesperidin Methyl Chalcone (HMC) against the neurotoxicity induced by Aβ(25-35) peptide. HMC demonstrated higher free-radical scavenging activity than Hesperidin in initial cell-free studies. Investigations using the fluorescent dye thioflavin T with Aβ(25-35) peptide showed that HMC has the ability to combat extracellular amyloid aggregation by possessing anti-aggregation property against oligomers and by disaggregating mature fibrils. Also, the results of the molecular simulation studies show that HMC ameliorated oligomer formation. Further, the anti-Alzheimer's property of HMC was investigated in in vitro cell conditions by pre-treating the neuro 2a (N2a) cells with HMC before inducing Aβ(25-35) toxicity. The findings demonstrate that HMC increased cell viability, reduced oxidative stress, prevented macromolecular damage, allayed mitochondrial dysfunction, and exhibited anticholinesterase activity. HMC also reduced Aβ induced neuronal cell death by modulating caspase-3 activity, Bax expression and Bcl2 overexpression, demonstrating that HMC pre-treatment reduced mitochondrial damage and intrinsic apoptosis induced by Aβ(25-35).In silico evaluation against potential AD targets reveal that HMC could be a potent inhibitor of BACE-1, inhibiting the formation of toxic Aβ peptides. Overall, the findings imply that the neuroprotective efficacy of HMC has high prospects for addressing a variety of pathogenic consequences caused by amyloid beta in AD situations and alleviating cognitive impairments.
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Affiliation(s)
- Sakthivel Jafni
- Department of Biotechnology, Alagappa University, Karaikudi 630003, Tamil Nadu, India
| | - Sethuraman Sathya
- Department of Biotechnology, Alagappa University, Karaikudi 630003, Tamil Nadu, India
| | - Malaisamy Arunkumar
- Transcription Regulation Group, International Centre for Genetic Engineering and Biotechnology (ICGEB), New Delhi 110067, India
| | | | - Mahalingam Jeyakumar
- Department of Biotechnology, Alagappa University, Karaikudi 630003, Tamil Nadu, India
| | - Easwaran Murugesh
- Research Scientist, Bioinformatics Centre, GRC - Ganga Hospital, Coimbatore, India
| | - Kasi Pandima Devi
- Department of Biotechnology, Alagappa University, Karaikudi 630003, Tamil Nadu, India.
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6
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Nakamura R, Konishi M, Higashi Y, Saito M, Akizawa T. Five-mer peptides prevent short-term spatial memory deficits in Aβ25-35-induced Alzheimer's model mouse by suppressing Aβ25-35 aggregation and resolving its aggregate form. Alzheimers Res Ther 2023; 15:83. [PMID: 37076912 PMCID: PMC10114458 DOI: 10.1186/s13195-023-01229-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 04/10/2023] [Indexed: 04/21/2023]
Abstract
BACKGROUND The development of drugs for Alzheimer's disease (AD), which is related to the misfolding and aggregation of amyloid-β (Aβ), is high in demand due to the growing number of AD patients. In this study, we screened 22 kinds of 5-mer synthetic peptides derived from the Box A region of Tob1 protein to find a peptide effective against Aβ aggregation. METHODS A Thioflavin T (ThT) assay was performed to evaluate aggregation and screen aggregation inhibitors. Male ICR mice (6 weeks old) were administered saline, 9 nmol Aβ25-35, or a mixture of 9 nmol Aβ25-35 and 9 nmol GSGFK in the right lateral ventricle. Short-term spatial memory was assessed through Y-maze. Microglia cells (BV-)2 cells were plated on 24-well plates (4 × 104 cells/well) and incubated for 48 h, and then, the cells were treated with 0.01, 0.05, 0.1, 0.2, or 0.5 mM GSGFK. After incubation for 24 h, bead uptake was evaluated using a laser confocal microscope and Cytation 5. RESULTS We found two kinds of peptides, GSGNR and GSGFK, that were not only suppressed by aggregation of Aβ25-35 but also resolved the aggregated Aβ25-35. Results obtained from the Y-maze test on an Aβ25-35-induced AD model mouse indicated that GSGFK prevents the deficits in short-term memory induced by Aβ25-35. The effect of GSGFK on phagocytosis in BV-2 cells proved that GSGFK activates the phagocytic ability of microglia. CONCLUSIONS In conclusion, 5-mer peptides prevent short-term memory deficit in Aβ25-35 induced AD model mouse by reducing the aggregated Aβ25-35. They may also upregulate the phagocytic ability of microglia, which makes 5-mer peptides suitable candidates as therapeutic drugs against AD.
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Affiliation(s)
- Rina Nakamura
- Department of Pharmacology, Kochi Medical School, Kochi University, Kohasu, Oko-Cho, Nankoku, Kochi, 783-8505, Japan
- O-Force Co., Ltd, 3454 Irino Kuroshio-Cho, Hata-Gun, Kochi, 789-1931, Japan
| | - Motomi Konishi
- Department of Integrative Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-Cho, Hirakata, Osaka, 573-0101, Japan
| | - Youichirou Higashi
- Department of Pharmacology, Kochi Medical School, Kochi University, Kohasu, Oko-Cho, Nankoku, Kochi, 783-8505, Japan
| | - Motoaki Saito
- Department of Pharmacology, Kochi Medical School, Kochi University, Kohasu, Oko-Cho, Nankoku, Kochi, 783-8505, Japan
| | - Toshifumi Akizawa
- Department of Pharmacology, Kochi Medical School, Kochi University, Kohasu, Oko-Cho, Nankoku, Kochi, 783-8505, Japan.
- O-Force Co., Ltd, 3454 Irino Kuroshio-Cho, Hata-Gun, Kochi, 789-1931, Japan.
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7
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Anti-Inflammatory Activity of 4-(4-(Heptyloxy)phenyl)-2,4-dihydro-3 H-1,2,4-triazol-3-one via Repression of MAPK/NF-κB Signaling Pathways in β-Amyloid-Induced Alzheimer's Disease Models. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27155035. [PMID: 35956985 PMCID: PMC9370156 DOI: 10.3390/molecules27155035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 07/31/2022] [Accepted: 08/05/2022] [Indexed: 01/03/2023]
Abstract
Alzheimer’s disease (AD) is a major neurodegenerative disease, but so far, it can only be treated symptomatically rather than changing the process of the disease. Recently, triazoles and their derivatives have been shown to have potential for the treatment of AD. In this study, the neuroprotective effects of 4-(4-(heptyloxy)phenyl)-2,4-dihydro-3H-1,2,4-triazol-3-one (W112) against β-amyloid (Aβ)-induced AD pathology and its possible mechanism were explored both in vitro and in vivo. The results showed that W112 exhibits a neuroprotective role against Aβ-induced cytotoxicity in PC12 cells and improves the learning and memory abilities of Aβ-induced AD-like rats. In addition, the assays of the protein expression revealed that W112 reversed tau hyperphosphorylation and reduced the production of proinflammatory cytokines, tumor necrosis factor-α and interleukin-6, both in vitro and in vivo studies. Further study indicated that the regulation of mitogen-activated protein kinase/nuclear factor-κB pathways played a key role in mediating the neuroprotective effects of W112 against AD-like pathology. W112 may become a potential drug for AD intervention.
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8
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Wang Q, Huang X, Su Y, Yin G, Wang S, Yu B, Li H, Qi J, Chen H, Zeng W, Zhang K, Verkhratsky A, Niu J, Yi C. Activation of Wnt/β-catenin pathway mitigates blood-brain barrier dysfunction in Alzheimer's disease. Brain 2022; 145:4474-4488. [PMID: 35788280 DOI: 10.1093/brain/awac236] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 05/29/2022] [Accepted: 06/14/2022] [Indexed: 11/13/2022] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder that causes age-dependent neurological and cognitive declines. The treatments for AD pose a significant challenge, because the mechanisms of disease are not being fully understood. Malfunction of the blood-brain barrier (BBB) is increasingly recognized as a major contributor to the pathophysiology of AD, especially at the early stages of the disease. However, the underlying mechanisms remain poorly characterized, while few molecules can directly target and improve BBB function in the context of AD. Here, we showed dysfunctional BBB in AD patients reflected by perivascular accumulation of blood-derived fibrinogen in the hippocampus and cortex, accompanied by decreased tight junction proteins Claudin-5 and glucose transporter Glut-1 in the brain endothelial cells (BECs). In the APPswe/PS1dE9 (APP/PS1) mouse model of AD, BBB dysfunction started at 4 months of age and became severe at 9 months of age. In the cerebral microvessels of APP/PS1 mice and Aβ-treated BECs, we found suppressed Wnt/β-catenin signaling triggered by an increase of GSK3β activation, but not an inhibition of the AKT pathway or switching to the Wnt/planar cell polarity pathway. Furthermore, using our newly developed optogenetic tool for controlled regulation of LRP6 (upstream regulator of the Wnt signaling) to activate Wnt/β-catenin pathway, BBB malfunction was restored by preventing Aβ-induced BEC impairments and promoting the barrier repair. In conclusion, targeting LRP6 in the Wnt/β-catenin pathway in the brain endothelium can alleviate BBB malfunction induced by Aβ, which may be a potential treatment strategy for AD.
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Affiliation(s)
- Qi Wang
- Research Centre, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China.,Department of Histology and Embryology, Chongqing Key Laboratory of Neurobiology, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University, Chongqing, China
| | - Xiaomin Huang
- Research Centre, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Yixun Su
- Research Centre, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China.,Department of Histology and Embryology, Chongqing Key Laboratory of Neurobiology, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University, Chongqing, China
| | - Guowei Yin
- Research Centre, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Shouyu Wang
- Department of Histology and Embryology, Chongqing Key Laboratory of Neurobiology, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University, Chongqing, China
| | - Bin Yu
- Department of Histology and Embryology, Chongqing Key Laboratory of Neurobiology, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University, Chongqing, China
| | - Hui Li
- Research Centre, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China.,Department of Histology and Embryology, Chongqing Key Laboratory of Neurobiology, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University, Chongqing, China
| | - Junhua Qi
- Research Centre, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Hui Chen
- School of Life Sciences, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Wen Zeng
- Department of Cell Biology, State Key Laboratory of Trauma, Burn and Combined Injury, Third Military Medical University, Chongqing, China
| | - Kai Zhang
- Department of Biochemistry, School of Molecular and Cellular Biology, the University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Alexei Verkhratsky
- Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK.,Achucarro Center for Neuroscience, IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
| | - Jianqin Niu
- Department of Histology and Embryology, Chongqing Key Laboratory of Neurobiology, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University, Chongqing, China
| | - Chenju Yi
- Research Centre, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
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9
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Cell models for Alzheimer’s and Parkinson’s disease: At the interface of biology and drug discovery. Biomed Pharmacother 2022; 149:112924. [DOI: 10.1016/j.biopha.2022.112924] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/31/2022] [Accepted: 04/04/2022] [Indexed: 11/23/2022] Open
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10
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Fatima S, Arshad F, Amani S. Arsenite Induced Conformational Changes and Aggregation in Human
Serum Albumin (HSA) and its Prevention by Naringin. CURR PROTEOMICS 2022. [DOI: 10.2174/1570164618666210423131625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Heavy metals and metalloids like arsenic, cadmium, mercury acts as denaturing
agent for biomolecules. They interfere with protein’s physiological activity by forming a
complex with the protein’s side chain or removing the essential metal ions from metalloproteins
and replacing them. Protein aggregation is an extensive phenomenon in a cell and is linked with
various pathological conditions.
Aim:
In this study, we aim to prove that proteins are highly susceptible to arsenite toxicity by
arsenite-induced protein aggregation; and that naringin reduces the aggregation effect.
Methods:
Several biophysical techniques were employed to study the protein aggregation due to
arsenite and its prevention by naringin.
Results:
Through our experiments, the results showed that aggregation induced by arsenite was reduced
in the presence of naringin at twice the concentration of arsenite.
Conclusion:
In conclusion, our study showed that naringin plays a protective role during HSA aggregation
due to arsenite.
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Affiliation(s)
- Shamila Fatima
- Department of Biochemistry, Aligarh Muslim University, Uttar Pradesh, India
| | - Fareeha Arshad
- Department of Biochemistry, Aligarh Muslim University, Uttar Pradesh, India
| | - Samreen Amani
- Department of Biochemistry, Aligarh Muslim University, Uttar Pradesh, India
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11
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MacKenzie JL, Ivanova N, Nell HJ, Giordano CR, Terlecky SR, Agca C, Agca Y, Walton PA, Whitehead SN, Cechetto DF. Microglial inflammation and cognitive dysfunction in comorbid rat models of striatal ischemic stroke and alzheimer’s disease: effects of antioxidant catalase-SKL on behavioral and cellular pathology. Neuroscience 2022; 487:47-65. [DOI: 10.1016/j.neuroscience.2022.01.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 01/26/2022] [Accepted: 01/28/2022] [Indexed: 12/25/2022]
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12
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D’Ezio V, Colasanti M, Persichini T. Amyloid-β 25-35 Induces Neurotoxicity through the Up-Regulation of Astrocytic System X c. Antioxidants (Basel) 2021; 10:antiox10111685. [PMID: 34829555 PMCID: PMC8615014 DOI: 10.3390/antiox10111685] [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: 09/23/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 11/19/2022] Open
Abstract
Amyloid-β (Aβ) deposition, a hallmark of Alzheimer’s disease, is known to induce free radical production and oxidative stress, leading to neuronal damage. During oxidative stress, several cell types (including astrocytes) can activate the nuclear factor erythroid 2-related factor 2 (Nrf2), a regulator of several phase II detoxifying and antioxidant genes, such as the System Xc− subunit xCT. Here, we studied (i) the effect of the Aβ fragment 25-35 (Aβ25-35) on Nrf2-dependent System Xc− expression in U373 human astroglial cells and (ii) the effect of Aβ25-35-induced astrocytic response on neuronal cell viability using an in vitro co-culture system. We found that Aβ25-35 was able to activate an antioxidant response in astrocytes, by inducing both Nrf2 activation and System Xc− up-regulation. However, this astrocytic response caused an enhanced cell mortality of co-cultured SH-SY5Y cells, taken as a neuronal model. Consistently, the specific System Xc− inhibitor sulfasalazine prevented the increase of both neuronal mortality and extracellular glutamate levels, thus indicating that the neurotoxic effect was due to an augmented release of glutamate through the transporter. The involvement of NMDA receptor activation in this pathway was also demonstrated using the specific inhibitor MK801 that completely restored neuronal viability at the control levels. The present study sheds light on the Nrf2/system Xc− pathway in the toxicity induced by Aβ25-35 and may help to better understand the involvement of astrocytes in neuronal death during Alzheimer’s disease.
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Sundaria N, Upadhyay A, Prasad A, Prajapati VK, Poluri KM, Mishra A. Neurodegeneration & imperfect ageing: Technological limitations and challenges? Mech Ageing Dev 2021; 200:111574. [PMID: 34562507 DOI: 10.1016/j.mad.2021.111574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 08/29/2021] [Accepted: 09/21/2021] [Indexed: 11/18/2022]
Abstract
Cellular homeostasis is regulated by the protein quality control (PQC) machinery, comprising multiple chaperones and enzymes. Studies suggest that the loss of the PQC mechanisms in neurons may lead to the formation of abnormal inclusions that may lead to neurological disorders and defective aging. The questions could be raised how protein aggregate formation precisely engenders multifactorial molecular pathomechanism in neuronal cells and affects different brain regions? Such questions await thorough investigation that may help us understand how aberrant proteinaceous bodies lead to neurodegeneration and imperfect aging. However, these studies face multiple technological challenges in utilizing available tools for detailed characterizations of the protein aggregates or amyloids and developing new techniques to understand the biology and pathology of proteopathies. The lack of detection and analysis methods has decelerated the pace of the research in amyloid biology. Here, we address the significance of aggregation and inclusion formation, followed by exploring the evolutionary contribution of these structures. We also provide a detailed overview of current state-of-the-art techniques and advances in studying amyloids in the diseased brain. A comprehensive understanding of the structural, pathological, and clinical characteristics of different types of aggregates (inclusions, fibrils, plaques, etc.) will aid in developing future therapies.
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Affiliation(s)
- Naveen Sundaria
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology, Jodhpur, Rajasthan, 342037, India
| | - Arun Upadhyay
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology, Jodhpur, Rajasthan, 342037, India
| | - Amit Prasad
- School of Basic Sciences, Indian Institute of Technology Mandi, Mandi, India
| | - Vijay Kumar Prajapati
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, NH‑8 Bandarsindri, Ajmer, Rajasthan, 305817, India
| | - Krishna Mohan Poluri
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - Amit Mishra
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology, Jodhpur, Rajasthan, 342037, India.
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Saygisever K, Faikoglu G, Celik H, Ugur SA, Gokhan Akk A, Kelicen-Ug P, Ozyazgan S. Effect of Three PDEIs on Neuroprotective and Autophagy Proteins in vitro AD Model. INT J PHARMACOL 2021. [DOI: 10.3923/ijp.2021.169.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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15
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Wiatrak B, Piasny J, Kuźniarski A, Gąsiorowski K. Interactions of Amyloid-β with Membrane Proteins. Int J Mol Sci 2021; 22:6075. [PMID: 34199915 PMCID: PMC8200087 DOI: 10.3390/ijms22116075] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 05/31/2021] [Accepted: 06/03/2021] [Indexed: 12/11/2022] Open
Abstract
In developing and developed countries, an increasing elderly population is observed. This affects the growing percentage of people struggling with neurodegenerative diseases, including Alzheimer's disease. Nevertheless, the pathomechanism of this disease is still unknown. This contributes to problems with early diagnosis of the disease as well as with treatment. One of the most popular hypotheses of Alzheimer's disease is related to the pathological deposition of amyloid-β (Aβ) in the brain of ill people. In this paper, we discuss issues related to Aβ and its relationship in the development of Alzheimer's disease. The structure of Aβ and its interaction with the cell membrane are discussed. Not only do the extracellular plaques affect nerve cells, but other forms of this peptide as well.
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Affiliation(s)
- Benita Wiatrak
- Department of Pharmacology, Wroclaw Medical University, Mikulicza-Radeckiego 2, 50-345 Wroclaw, Poland
- Department of Basic Medical Sciences, Wroclaw Medical University, Borowska 211, 50-556 Wroclaw, Poland;
| | - Janusz Piasny
- Department of Pharmacology, Wroclaw Medical University, Mikulicza-Radeckiego 2, 50-345 Wroclaw, Poland
| | - Amadeusz Kuźniarski
- Department of Prosthetic Dentistry, Wroclaw Medical University, Krakowska 26, 50-425 Wroclaw, Poland;
| | - Kazimierz Gąsiorowski
- Department of Basic Medical Sciences, Wroclaw Medical University, Borowska 211, 50-556 Wroclaw, Poland;
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16
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Fabbretti E, Antognolli G, Tongiorgi E. Amyloid-β Impairs Dendritic Trafficking of Golgi-Like Organelles in the Early Phase Preceding Neurite Atrophy: Rescue by Mirtazapine. Front Mol Neurosci 2021; 14:661728. [PMID: 34149353 PMCID: PMC8209480 DOI: 10.3389/fnmol.2021.661728] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 04/30/2021] [Indexed: 12/20/2022] Open
Abstract
Neurite atrophy with loss of neuronal polarity is a pathological hallmark of Alzheimer's disease (AD) and other neurological disorders. While there is substantial agreement that disruption of intracellular vesicle trafficking is associated with axonal pathology in AD, comparatively less is known regarding its role in dendritic atrophy. This is a significant gap of knowledge because, unlike axons, dendrites are endowed with the complete endomembrane system comprising endoplasmic reticulum (ER), ER-Golgi intermediate compartment (ERGIC), Golgi apparatus, post-Golgi vesicles, and a recycling-degradative route. In this study, using live-imaging of pGOLT-expressing vesicles, indicative of Golgi outposts and satellites, we investigate how amyloid-β (Aβ) oligomers affect the trafficking of Golgi-like organelles in the different dendritic compartments of cultured rat hippocampal neurons. We found that short-term (4 h) treatment with Aβ led to a decrease in anterograde trafficking of Golgi vesicles in dendrites of both resting and stimulated (with 50 mM KCl) neurons. We also characterized the ability of mirtazapine, a noradrenergic and specific serotonergic tetracyclic antidepressant (NaSSA), to rescue Golgi dynamics in dendrites. Mirtazapine treatment (10 μM) increased the number and both anterograde and retrograde motility, reducing the percentage of static Golgi vesicles. Finally, mirtazapine reverted the neurite atrophy induced by 24 h treatment with Aβ oligomers, suggesting that this drug is able to counteract the effects of Aβ by improving the dendritic trafficking of Golgi-related vesicles.
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Affiliation(s)
- Elsa Fabbretti
- Department of Life Sciences, University of Trieste, Trieste, Italy
| | | | - Enrico Tongiorgi
- Department of Life Sciences, University of Trieste, Trieste, Italy
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Acute Effects of Two Different Species of Amyloid- β on Oscillatory Activity and Synaptic Plasticity in the Commissural CA3-CA1 Circuit of the Hippocampus. Neural Plast 2021; 2020:8869526. [PMID: 33381164 PMCID: PMC7765721 DOI: 10.1155/2020/8869526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 12/04/2020] [Accepted: 12/08/2020] [Indexed: 11/29/2022] Open
Abstract
Recent evidence indicates that soluble amyloid-β (Aβ) species induce imbalances in excitatory and inhibitory transmission, resulting in neural network functional impairment and cognitive deficits during early stages of Alzheimer's disease (AD). To evaluate the in vivo effects of two soluble Aβ species (Aβ25-35 and Aβ1-40) on commissural CA3-to-CA1 (cCA3-to-CA1) synaptic transmission and plasticity, and CA1 oscillatory activity, we used acute intrahippocampal microinjections in adult anaesthetized male Wistar rats. Soluble Aβ microinjection increased cCA3-to-CA1 synaptic variability without significant changes in synaptic efficiency. High-frequency CA3 stimulation was rendered inefficient by soluble Aβ intrahippocampal injection to induce long-term potentiation and to enhance synaptic variability in CA1, contrasting with what was observed in vehicle-injected subjects. Although soluble Aβ microinjection significantly increased the relative power of γ-band and ripple oscillations and significantly shifted the average vector of θ-to-γ phase-amplitude coupling (PAC) in CA1, it prevented θ-to-γ PAC shift induced by high-frequency CA3 stimulation, opposite to what was observed in vehicle-injected animals. These results provide further evidence that soluble Aβ species induce synaptic dysfunction causing abnormal synaptic variability, impaired long-term plasticity, and deviant oscillatory activity, leading to network activity derailment in the hippocampus.
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18
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Marbouti L, Zahmatkesh M, Riahi E, Shafiee Sabet M. GnRH protective effects against amyloid β-induced cognitive decline: A potential role of the 17β-estradiol. Mol Cell Endocrinol 2020; 518:110985. [PMID: 32805333 DOI: 10.1016/j.mce.2020.110985] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 08/04/2020] [Accepted: 08/07/2020] [Indexed: 12/20/2022]
Abstract
INTRODUCTION The 17β-estradiol (E2) enhances hippocampal dendritic spine synapses, facilitates learning processes, and exerts neuroprotection. Brain estrogen decline has been reported in Alzheimer's disease. The role of GnRH in modulating steroid biosynthesis convinced us to examine whether hippocampal GnRH administration could enhance the local E2 levels and overcome the development of cognition decline in amyloid β (Aβ) neurotoxicity. To explore if GnRH acts through regulating E2 synthesis, letrozole, an aromatase inhibitor, has been applied in combination with GnRH. METHODS Female rats received an intracerebroventricular injection of Aβ. The GnRH and, or letrozole were injected into the CA1 for 14 consecutive days. Working memory, novel object recognition memory, and anxiety-like behavior were evaluated. Serum and hippocampal E2 levels were measured. Hippocampal mRNA expression of GnRH (GnRH-R) and E2 (ERα and ERβ) receptors was assessed. GnRH effect on the excitability of pyramidal cells was studied by in vivo single-unit recording. RESULTS GnRH increased hippocampal E2 levels, evoked an increase in the spontaneous firing of pyramidal neurons, and caused mRNA overexpression of hippocampal GnRH receptors. GnRH prevented the adverse effects of Aβ on working memory, NOR index, and anxiogenic behavior. Letrozole did not reverse GnRH modulatory effects on hippocampal E2 levels and neuroprotection. CONCLUSION GnRH prevented the Aβ-induced memory deficit, which may be mediated through hippocampal E2 levels enhancement. The electrophysiological analysis revealed the enhanced neuronal excitability in the CA1 region. All these data suggest that GnRH might be a promising candidate that reduces anxiety and improves memory indices in the context of Aβ neurotoxicity.
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Affiliation(s)
- Ladan Marbouti
- Neuroscience and Addiction Studies Department, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Zahmatkesh
- Neuroscience and Addiction Studies Department, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran; Electrophysiology Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran; Cognitive and Behavioral Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Esmail Riahi
- Physiology Department, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahdi Shafiee Sabet
- Family Medicine Department, Ziaeian Hospital, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Lee AY, Choi JM, Lee YA, Shin SH, Cho EJ. Beneficial effect of black rice ( Oryza sativa L. var. japonica ) extract on amyloid β-induced cognitive dysfunction in a mouse model. Exp Ther Med 2020; 20:64. [PMID: 32963594 DOI: 10.3892/etm.2020.9192] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 05/29/2020] [Indexed: 12/29/2022] Open
Abstract
Alzheimer's disease (AD) is an age-dependent progressive neurodegenerative disease, resulting in memory loss and cognitive dysfunction. The accumulation of amyloid β (Aβ) has been identified as the most important risk factor for AD. Black rice (BR; Oryza sativa L. var. japonica), which is widely consumed in Asia, is a good source of bioactive compounds including anthocyanins. Therefore, the aim of the present study was to evaluate the protective effect of BR extracts against Aβ25-35-induced memory impairment in an in vivo AD mouse model. After intracerebroventricular injection of Aβ25-35, mice were treated with BR extract supplementation for 14 days. Memory and cognition function were evaluated over this period in both treated and untreated animals using T-maze, novel object recognition and Morris water maze tests. After behavioral tests, malondialdehyde (MDA) and nitric oxide (NO) concentrations in brain, liver and kidney tissues were analyzed. Mice treated with Aβ25-35 had impaired memory and cognitive function; however, mice administered BR extract (100 mg/kg/day) demonstrated an improvement in cognition and memory function compared with the Aβ25-35-injected control group. Furthermore, injection of Aβ25-35 significantly increased MDA and NO generation in the brain, liver and kidney of mice. However, the group administered with BR extract had significantly inhibited lipid peroxidation and NO generation in the brain, liver and kidney. In addition, the protective effect of BR on lipid peroxidation and NO production by Aβ25-35 was stronger in the brain compared with other tissues. Collectively, these findings suggested that BR supplementation may prevent memory and cognition deficits caused by Aβ25-35-induced oxidative stress.
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Affiliation(s)
- Ah Young Lee
- Department of Food Science, Gyeongnam National University of Science and Technology, Jinju 52725, Republic of Korea
| | - Ji Myung Choi
- Department of Food Science and Nutrition, Research Institute of Ecology, Pusan National University, Busan 46241, Republic of Korea
| | - Young A Lee
- Department of Food Science and Nutrition, Catholic University of Daegu, Gyeongsan 38430, Republic of Korea
| | - Seon Hwa Shin
- Department of Food Science and Nutrition, Research Institute of Ecology, Pusan National University, Busan 46241, Republic of Korea
| | - Eun Ju Cho
- Department of Food Science and Nutrition, Research Institute of Ecology, Pusan National University, Busan 46241, Republic of Korea
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20
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Amyloid β chaperone - lipocalin-type prostaglandin D synthase acts as a peroxidase in the presence of heme. Biochem J 2020; 477:1227-1240. [PMID: 32271881 PMCID: PMC7148433 DOI: 10.1042/bcj20190536] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 02/07/2020] [Accepted: 02/12/2020] [Indexed: 12/01/2022]
Abstract
The extracellular transporter, lipocalin-type prostaglandin D synthase (L-PGDS) binds to heme and heme metabolites with high affinity. It has been reported that L-PGDS protects neuronal cells against apoptosis induced by exposure to hydrogen peroxide. Our study demonstrates that when human WT L-PGDS is in complex with heme, it exhibits a strong peroxidase activity thus behaving as a pseudo-peroxidase. Electron paramagnetic resonance studies confirm that heme in the L-PGDS–heme complex is hexacoordinated with high-spin Fe(III). NMR titration of heme in L-PGDS points to hydrophobic interaction between heme and several residues within the β-barrel cavity of L-PGDS. In addition to the transporter function, L-PGDS is a key amyloid β chaperone in human cerebrospinal fluid. The presence of high levels of bilirubin and its derivatives, implicated in Alzheimer's disease, by binding to L-PGDS may reduce its chaperone activity. Nevertheless, our ThT binding assay establishes that heme and heme metabolites do not significantly alter the neuroprotective chaperone function of L-PGDS. Guided by NMR data we reconstructed the heme L-PGDS complex using extensive molecular dynamics simulations providing a platform for mechanistic interpretation of the catalytic and transporting functions and their modulation by secondary ligands like Aβ peptides and heme metabolites.
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21
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Feasibility of synthesizing γ-[Glu] -Gln using high solid concentrations and glutaminase from Bacillus amyloliquefaciens as the catalyst. Food Chem 2020; 310:125920. [DOI: 10.1016/j.foodchem.2019.125920] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 11/15/2019] [Accepted: 11/17/2019] [Indexed: 02/05/2023]
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22
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Study on the structure and membrane disruption of the peptide oligomers constructed by hIAPP 18-27 peptide and its d,l-alternating isomer. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2019; 1862:183108. [PMID: 31672548 DOI: 10.1016/j.bbamem.2019.183108] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 09/26/2019] [Accepted: 10/16/2019] [Indexed: 01/14/2023]
Abstract
Increasing lines of evidence show that the oligomeric intermediates of amyloid peptides/proteins are toxic to biological membranes. However, the structural features of the oligomers that are closely associated with the ability to damage biological membranes are far from understanding. In this study, we constructed two species of oligomers using hIAPP18-27 peptide and its d,l-alternating isomer, examined the disruptive ability of the oligomers to POPC/POPG 4:1 vesicles by leakage assay and 31P NMR spectroscopy, and characterized the structural features of the oligomers by CD, TEM, 1H NMR and fluorescence quenching experiments. We found that the d,l-alternating peptide oligomers are more disruptive than the all-L peptide oligomers to the lipid membrane. The characterization of the secondary structure revealed that the d,l-alternating peptide adopts an extended polyproline type-II (PPII) conformation, while the all-L peptide adopts a random coil conformation in oligomers. Compared with the all-L peptide oligomers, the d,l-alternating peptide oligomers are less compact and keep more hydrophobic groups water exposed. Both the changes from PPII to α-sheet in the structure of d,l-alternating peptide and from random coil to β-sheet in the structure of all-L peptide reduce the ability of the peptide oligomers to disrupt the lipid membrane. Our results suggest that an oligomer with extended peptide chains could be more potent in membrane disruption than an oligomer with folded peptide chains and an increase in peptide-peptide interaction could decrease the disruptive ability of oligomer.
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Aminyavari S, Zahmatkesh M, Farahmandfar M, Khodagholi F, Dargahi L, Zarrindast MR. Protective role of Apelin-13 on amyloid β25-35-induced memory deficit; Involvement of autophagy and apoptosis process. Prog Neuropsychopharmacol Biol Psychiatry 2019; 89:322-334. [PMID: 30296470 DOI: 10.1016/j.pnpbp.2018.10.005] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 08/05/2018] [Accepted: 10/04/2018] [Indexed: 11/27/2022]
Abstract
Alzheimer's disease (AD) by progressive neurodegenerative pattern is associated with autophagy stress which is suggested as a potential cause of amyloid β (Aβ) aggregation and neural loss. Apelin-13, a neuropeptide with modulatory effect on autophagy, has been shown the beneficial effects on neural cell injuries. We investigated the effect of Apelin-13 on Aβ-induced memory deficit as well as autophagy and apoptosis processes. We performed bilateral intra-CA1 injection of Aβ25-35 alone or in combination with Apelin-13. Spatial reference and working memory was evaluated using the Morris water maze (MWM) and Y-maze tests. Hippocampus was harvested on 2, 5, 10 and 21 days after Aβ injection. The light chain 3 (LC3II/I) ratio, histone deacetylase 6 (HDAC6) level, Caspase-3 cleavage, and mTOR phosphorylation were assessed using western blot technique. Intra-CA1 injection of Aβ caused impairment of working and spatial memory. We observed higher LC3II/I ratio, cleaved caspase-3 and lower HDAC6, and p-mTOR/mTOR ratio in Aβ-treated animals. Apelin-13 provided significant protection against the destructive effects of Aβ on working and spatial memory. Apelin-13 prevented the increase of LC3II/I ratio and cleaved caspase-3 on days 10 and 21 after injection of Aβ. It also limited the Aβ-induced reduction in HDAC6 expression. This implies that Apelin-13 has suppressed both autophagy and apoptosis. Our findings suggested that the neuroprotection of Apelin-13 may be in part related to autophagy and apoptosis inhibition via the mTOR signaling pathway. Apelin-13 may be a promising approach to improve memory impairment and potentially pave the way for new therapeutic plans in AD.
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Affiliation(s)
- Samaneh Aminyavari
- Department of Neuroscience and Addiction Studies, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Zahmatkesh
- Department of Neuroscience and Addiction Studies, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran; Cognitive Sciences and Behavior Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Maryam Farahmandfar
- Department of Neuroscience and Addiction Studies, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Fariba Khodagholi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Leila Dargahi
- Neurobiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad-Reza Zarrindast
- Department of Neuroscience and Addiction Studies, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Antioxidant Activity and Neuroprotective Activity of Stilbenoids in Rat Primary Cortex Neurons via the PI3K/Akt Signalling Pathway. Molecules 2018; 23:molecules23092328. [PMID: 30213108 PMCID: PMC6225246 DOI: 10.3390/molecules23092328] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 09/05/2018] [Accepted: 09/06/2018] [Indexed: 12/28/2022] Open
Abstract
Antioxidant activity and neuroprotective activity of three stilbenoids, namely, trans-4-hydroxystilbene (THS), trans-3,5,4′-trihydroxy-stilbene (resveratrol, RES), and trans-3′,4′,3,5-tetrahydroxy-stilbene (piceatannol, PIC), against β-amyloid (Aβ)-induced neurotoxicity in rat primary cortex neurons were evaluated. THS, RES, and PIC significantly scavenged DPPH• and •OH radicals. All three stilbenoids were able to inhibit Aβ neurotoxicity by decreasing intracellular reactive oxygen species (ROS) via the PI3K/Akt signalling pathway. Specifically, stilbenoids significantly promoted Akt phosphorylation; suppressed Bcl-2/Bax expression; and inhibited caspase-9, caspase-3, and PARP cleavage. Molecular docking between stilbenoids with Akt indicated that stilbenoids could form hydrogen bond interactions with the COOH-terminal region of Akt. Additionally, the neuroprotective activity of stilbenoids correlated with the number and position of hydroxyl groups. The lack of meta-dihydroxyl groups on THS did not affect its neuroprotective activity in comparison with RES, whereas the ortho-dihydroxyl moiety on PIC significantly enhanced neuroprotective activity. These results provide new insights into the correlation between the biological activity and chemical structure of stilbenoids.
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Di Natale G, Zimbone S, Bellia F, Tomasello M, Giuffrida M, Pappalardo G, Rizzarelli E. Potential therapeutics of Alzheimer's diseases: New insights into the neuroprotective role of trehalose‐conjugated beta sheet breaker peptides. Pept Sci (Hoboken) 2018. [DOI: 10.1002/pep2.24083] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- G. Di Natale
- Consiglio Nazionale delle Ricerche (CNR) Instituto di Biostrutture e Bioimmagini, Via Paolo Gaifami 18 Catania 95126 Italy
| | - S. Zimbone
- Consiglio Nazionale delle Ricerche (CNR) Instituto di Biostrutture e Bioimmagini, Via Paolo Gaifami 18 Catania 95126 Italy
| | - F. Bellia
- Consiglio Nazionale delle Ricerche (CNR) Instituto di Biostrutture e Bioimmagini, Via Paolo Gaifami 18 Catania 95126 Italy
| | - M.F. Tomasello
- Consiglio Nazionale delle Ricerche (CNR) Instituto di Biostrutture e Bioimmagini, Via Paolo Gaifami 18 Catania 95126 Italy
| | - M.L. Giuffrida
- Consiglio Nazionale delle Ricerche (CNR) Instituto di Biostrutture e Bioimmagini, Via Paolo Gaifami 18 Catania 95126 Italy
| | - G. Pappalardo
- Consiglio Nazionale delle Ricerche (CNR) Instituto di Biostrutture e Bioimmagini, Via Paolo Gaifami 18 Catania 95126 Italy
| | - E. Rizzarelli
- Consiglio Nazionale delle Ricerche (CNR) Instituto di Biostrutture e Bioimmagini, Via Paolo Gaifami 18 Catania 95126 Italy
- Dipartimento di Scienze Chimiche Università degli studi di Catania, Viale Andrea Doria 6 Catania 95125 Italy
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Lanza V, Bellia F, Rizzarelli E. An inorganic overview of natural Aβ fragments: Copper(II) and zinc(II)-mediated pathways. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.04.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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27
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Dokouhaki M, Hung A, Prime EL, Qiao GG, Day L, Gras SL. pH-Induced interfacial properties of Chaplin E from Streptomyces coelicolor. Colloids Surf B Biointerfaces 2017; 160:589-597. [PMID: 29028607 DOI: 10.1016/j.colsurfb.2017.10.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 09/14/2017] [Accepted: 10/03/2017] [Indexed: 10/18/2022]
Abstract
Chaplin E, or Chp E, is a surface active peptide secreted by Streptomyces coelicolor that adopts different structures depending on solution pH but the effect of these structures on the interfacial properties of Chp E is not known. In experiments paired with simulations, Chp E was found to display pH-dependent interfacial assembly and surface activity. At pH 3.0, Chp E formed an ordered non-amyloidal interfacial film with high surface activity; while at pH 10.0, Chp E self-assembled into a heterogeneous film containing randomly arranged fibrils at the interface that was less surface active compared to the film formed at pH 3.0. In simulations at pH 10.0, Chp E molecules showed a higher propensity for dimerization within the solution phase, lower rate of adsorption to the interface and tighter inter-molecular associations at the interface, consistent with the lower surface activity and smaller interfacial area coverage per molecule measured at this pH compared to at pH 3.0. A model is presented for the role of Chp E in the developmental differentiation of Streptomyces coelicolor, where Chp E contributes to changes in surface tension at low pH and the formation of fibrils on the surface of aerial hyphae at high pH. Our data also suggest Chp E could be a promising surface active agent with functional activity that can be controlled by pH.
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Affiliation(s)
- Mina Dokouhaki
- The Melbourne School of Engineering and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Andrew Hung
- School of Science, RMIT University, VIC 3001, Australia
| | - Emma L Prime
- Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia; Polymer Science Group, Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Greg G Qiao
- Polymer Science Group, Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Li Day
- AgResearch Ltd, Grasslands Research Centre, Tennent Drive, Palmerston North 4442, New Zealand
| | - Sally L Gras
- The Melbourne School of Engineering and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3010, Australia; The ARC Dairy Innovation Hub, The University of Melbourne, Parkville, VIC 3010, Australia.
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28
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Membrane-Accelerated Amyloid-β Aggregation and Formation of Cross-β Sheets. MEMBRANES 2017; 7:membranes7030049. [PMID: 28858214 PMCID: PMC5618134 DOI: 10.3390/membranes7030049] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 07/26/2017] [Accepted: 08/23/2017] [Indexed: 11/17/2022]
Abstract
Amyloid- β aggregates play a causative role in Alzheimer's disease. These aggregates are a product of the physical environment provided by the basic neuronal membrane, composed of a lipid bilayer. The intrinsic properties of the lipid bilayer allow amyloid- β peptides to nucleate and form well-ordered cross- β sheets within the membrane. Here, we correlate the aggregation of the hydrophobic fragment of the amyloid- β protein, A β 25 - 35 , with the hydrophobicity, fluidity, and charge density of a lipid bilayer. We summarize recent biophysical studies of model membranes and relate these to the process of aggregation in physiological systems.
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29
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Kalhor HR, Jabbari MP. Inhibition Mechanisms of a Pyridazine-Based Amyloid Inhibitor: As a β-Sheet Destabilizer and a Helix Bridge Maker. J Phys Chem B 2017; 121:7633-7645. [DOI: 10.1021/acs.jpcb.7b05189] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hamid R. Kalhor
- Biochemistry Research Laboratory,
Department of Chemistry, Sharif University of Technology, PO Box: 11365-11155, Tehran, Iran
| | - M. Parsa Jabbari
- Biochemistry Research Laboratory,
Department of Chemistry, Sharif University of Technology, PO Box: 11365-11155, Tehran, Iran
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30
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Ford L, Crossley M, Vadukul DM, Kemenes G, Serpell LC. Structure-dependent effects of amyloid-β on long-term memory in Lymnaea stagnalis. FEBS Lett 2017; 591:1236-1246. [PMID: 28337747 PMCID: PMC5435943 DOI: 10.1002/1873-3468.12633] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 02/24/2017] [Accepted: 03/20/2017] [Indexed: 12/03/2022]
Abstract
Amyloid‐β (Aβ) peptides are implicated in the causation of memory loss, neuronal impairment, and neurodegeneration in Alzheimer's disease. Our recent work revealed that Aβ 1–42 and Aβ 25–35 inhibit long‐term memory (LTM) recall in Lymnaea stagnalis (pond snail) in the absence of cell death. Here, we report the characterization of the active species prepared under different conditions, describe which Aβ species is present in brain tissue during the behavioral recall time point and relate the sequence and structure of the oligomeric species to the resulting neuronal properties and effect on LTM. Our results suggest that oligomers are the key toxic Aβ1–42 structures, which likely affect LTM through synaptic plasticity pathways, and that Aβ 1–42 and Aβ 25–35 cannot be used as interchangeable peptides.
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Affiliation(s)
- Lenzie Ford
- Sussex NeuroscienceSchool of Life SciencesUniversity of SussexBrightonUK
- Present address: Department of NeuroscienceColumbia UniversityNew YorkNY10032USA
- Present address: Howard Hughes Medical InstituteColumbia UniversityNew YorkNY10032USA
| | - Michael Crossley
- Sussex NeuroscienceSchool of Life SciencesUniversity of SussexBrightonUK
| | - Devkee M. Vadukul
- Sussex NeuroscienceSchool of Life SciencesUniversity of SussexBrightonUK
| | - György Kemenes
- Sussex NeuroscienceSchool of Life SciencesUniversity of SussexBrightonUK
| | - Louise C. Serpell
- Sussex NeuroscienceSchool of Life SciencesUniversity of SussexBrightonUK
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31
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The pH-dependent assembly of Chaplin E from Streptomyces coelicolor. J Struct Biol 2017; 198:82-91. [PMID: 28400129 DOI: 10.1016/j.jsb.2017.04.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 03/06/2017] [Accepted: 04/07/2017] [Indexed: 01/01/2023]
Abstract
Chaplin E, is one of five self-assembling peptides secreted by Streptomyces coelicolor that assist aerial growth by lowering the surface tension of water. Although the surface activity of a mixture of chaplin peptides has observed to depend on pH, it is unclear how the solvent environment (i.e. pH) influences the structure, assembly and subsequent functionality of these individual peptides. In this study, the conformation and fibril forming propensity of the Chaplin E peptide was assessed as a function of pH using a combination of experimental measurements and molecular dynamics simulations. At an acidic pH of 3.0, Chaplin E retained a random coil structure, whereas at the isoelectric point of 6.7 or a basic pH of 10.0, Chaplin E rapidly formed amyloid fibrils rich in β-sheet structure with high efficiency (>93%). Molecular dynamics simulations indicate the persistence of greater α-helical content at the N-terminus at high pH; this is likely partly due to the lack of electrostatic repulsion between residues His6 and Lys10. Since fibril formation was observed at high but not at low pH, we propose that the presence of an N-terminal α-helix in the monomeric form of Chaplin E is required for aggregation and conversion to β-amyloid fibrils. The pH sensitivity of Chaplin E peptide structure provides a route to control peptide assembly and may be important for the physiological function of this peptide, as a surface active agent in the transition from vegetative to aerial growth and could assist Streptomyces coelicolor in response to environmental fluctuations in pH.
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32
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Deibel S, Weishaupt N, Regis A, Hong N, Keeley R, Balog R, Bye C, Himmler S, Whitehead S, McDonald R. Subtle learning and memory impairment in an idiopathic rat model of Alzheimer's disease utilizing cholinergic depletions and β-amyloid. Brain Res 2016; 1646:12-24. [DOI: 10.1016/j.brainres.2016.05.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 05/16/2016] [Accepted: 05/17/2016] [Indexed: 02/02/2023]
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33
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Ferdousi M, Habibi-Rezaei M, Balalaie S, Ramezanpour S, Sabouni F, Poursasan N, Sabokdast M, Moosavi-Movahedi AA. Toxicity of serum albumin on microglia upon seeding effect of amyloid peptide. J Biochem 2016; 160:325-332. [PMID: 27405917 DOI: 10.1093/jb/mvw042] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 05/31/2016] [Indexed: 12/14/2022] Open
Abstract
We demonstrate in vitro cross-seeding of bovine serum albumin (BSA) in the presence of Aβ25-35 and their cytotoxic effects on microglial cells. To investigate the cross-seeding of BSA in the presence of Aβ25-35 fibrils, we examined how Aβ25-35 fibrils can function as seeds to trigger and accelerate BSA fibrillogenesis using ThT, intrinsic fluorescence, ANS fluorescence and transmission electron microscopy (TEM). Moreover, the effects of these fibrils on microglial viability were measured using MTT and Annexin V/propidium iodide (PI) staining. Although Aβ25-35 is toxic against microglia, it acted as seed and affected the aggregation pathway and accelerated the fibrillogenesis of BSA in vitro, resulted in an enhanced cytotoxic effect in comparison with Aβ25-35 or BSA alone. These observations thought to be helpful to understand the molecular mechanism of enhanced toxicity due to the coexistence of the aggregation prone proteins/peptides,. then cross-seeding effect on microglial cells that may involve in neurodegenerative diseases such as Alzheimer's disease (AD).
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Affiliation(s)
- Maryam Ferdousi
- School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Mehran Habibi-Rezaei
- School of Biology, College of Science, University of Tehran, Tehran, Iran .,Nano-Biomedicine Center of Excellence, Nanoscience and Nanotechnology Research Center, University of Tehran, Tehran, Iran
| | - Saeed Balalaie
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, Tehran, Iran
| | - Sorour Ramezanpour
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, Tehran, Iran
| | - Farzaneh Sabouni
- Department of Basic Sciences of Biotechnology, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Najmeh Poursasan
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Manijheh Sabokdast
- School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Ali A Moosavi-Movahedi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran.,Center of Excellence in Biothermodynamics, University of Tehran, Tehran, Iran
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34
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Khan JM, Sharma P, Arora K, Kishor N, Kaila P, Guptasarma P. The Achilles’ Heel of “Ultrastable” Hyperthermophile Proteins: Submillimolar Concentrations of SDS Stimulate Rapid Conformational Change, Aggregation, and Amyloid Formation in Proteins Carrying Overall Positive Charge. Biochemistry 2016; 55:3920-36. [DOI: 10.1021/acs.biochem.5b01343] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Javed M. Khan
- Centre for Protein Science,
Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge
City, Sector 81, SAS Nagar, Punjab, India 140306
| | - Prerna Sharma
- Centre for Protein Science,
Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge
City, Sector 81, SAS Nagar, Punjab, India 140306
| | - Kanika Arora
- Centre for Protein Science,
Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge
City, Sector 81, SAS Nagar, Punjab, India 140306
| | - Nitin Kishor
- Centre for Protein Science,
Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge
City, Sector 81, SAS Nagar, Punjab, India 140306
| | - Pallavi Kaila
- Centre for Protein Science,
Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge
City, Sector 81, SAS Nagar, Punjab, India 140306
| | - Purnananda Guptasarma
- Centre for Protein Science,
Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge
City, Sector 81, SAS Nagar, Punjab, India 140306
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35
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Treatment with the neurotoxic Aβ (25-35) peptide modulates the expression of neuroprotective factors Pin1, Sirtuin 1, and brain-derived neurotrophic factor in SH-SY5Y human neuroblastoma cells. ACTA ACUST UNITED AC 2016; 68:271-6. [PMID: 26915812 DOI: 10.1016/j.etp.2016.02.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 02/12/2016] [Accepted: 02/15/2016] [Indexed: 12/12/2022]
Abstract
The deposition of Amyloid β peptide plaques is a pathological hallmark of Alzheimer's disease (AD). The Aβ (25-35) peptide is regarded as the toxic fragment of full-length Aβ (1-42). The mechanism of its toxicity is not completely understood, along with its contribution to AD pathological processes. The aim of this study was to investigate the effect of the neurotoxic Aβ (25-35) peptide on the expression of the neuroprotective factors Pin1, Sirtuin1, and Bdnf in human neuroblastoma cells. Levels of Pin1, Sirtuin 1, and Bdnf were compared by real-time PCR and Western blotting in SH-SY5Y cells treated with Aβ (25-35) or administration vehicle. The level of Pin1 gene and protein expression was significantly decreased in cells exposed to 25 μM Aβ (25-35) compared to vehicle-treated controls. Similarly, Sirtuin1 expression was significantly reduced by Aβ (25-35) exposure. In contrast, both Bdnf mRNA and protein levels were significantly increased by Aβ (25-35) treatment, suggesting the activation of a compensatory response to the insult. Both Pin1 and Sirtuin 1 exert a protective role by reducing the probability of plaque deposition, since they promote amyloid precursor protein processing through non-amyloidogenic pathways. The present results show that Aβ (25-35) peptide reduced the production of these neuroprotective proteins, thus further increasing Aβ generation.
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36
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Wei Y, Lu J, Lu T, Meng F, Xu J, Wang L, Li Y, Wang L, Li F. Formation of lamellar micelle-like oligomers and membrane disruption revealed by the study of short peptide hIAPP18–27. Phys Chem Chem Phys 2016; 18:29847-29857. [DOI: 10.1039/c6cp04431j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An oligomer species with a lamellar crystalline structure is identified to disrupt the membrane containing the anionic component strongly.
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Affiliation(s)
- Ying Wei
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Jun Lu
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Tong Lu
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Feihong Meng
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Jia Xu
- College of Life Science
- Jilin University
- Changchun
- P. R. China
| | - Li Wang
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Yang Li
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Liping Wang
- College of Life Science
- Jilin University
- Changchun
- P. R. China
| | - Fei Li
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
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37
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Hu YX, Ying YL, Gu Z, Cao C, Yan BY, Wang HF, Long YT. Single molecule study of initial structural features on the amyloidosis process. Chem Commun (Camb) 2016; 52:5542-5. [DOI: 10.1039/c6cc01292b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We employed an α-hemolysin (α-HL) nanopore as a single-molecule tool to investigate the effects of initial structure on the amyloidosis process.
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Affiliation(s)
- Yong-Xu Hu
- Key Laboratory for Advanced Materials & Department of Chemistry
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Yi-Lun Ying
- Key Laboratory for Advanced Materials & Department of Chemistry
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Zhen Gu
- Key Laboratory for Advanced Materials & Department of Chemistry
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Chan Cao
- Key Laboratory for Advanced Materials & Department of Chemistry
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Bing-Yong Yan
- School of Information Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Hui-Feng Wang
- School of Information Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Yi-Tao Long
- Key Laboratory for Advanced Materials & Department of Chemistry
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
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38
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Part K, Künnis-Beres K, Poska H, Land T, Shimmo R, Zetterström Fernaeus S. Amyloid β25-35 induced ROS-burst through NADPH oxidase is sensitive to iron chelation in microglial Bv2 cells. Brain Res 2015; 1629:282-90. [PMID: 26505916 DOI: 10.1016/j.brainres.2015.09.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 09/28/2015] [Accepted: 09/29/2015] [Indexed: 11/27/2022]
Abstract
Iron chelation therapy and inhibition of glial nicotinamide adenine dinucleotide phosphate (NADPH) oxidase can both represent possible routes for Alzheimer's disease modifying therapies. The metal hypothesis is largely focused on direct binding of metals to the N-terminal hydrophilic 1-16 domain peptides of Amyloid beta (Aβ) and how they jointly give rise to reactive oxygen species (ROS) production. The cytotoxic effects of Aβ through ROS and metals are mainly studied in neuronal cells using full-length Aβ1-40/42 peptides. Here we study cellularly-derived ROS during 2-60min in response to non-metal associated mid domain Aβ25-35 in microglial Bv2 cells by fluorescence based spectroscopy. We analyze if Aβ25-35 induce ROS production through NADPH oxidase and if the production is sensitive to iron chelation. NADPH oxidase inhibitor diphenyliodonium (DPI) is used to confirm the production of ROS through NADPH oxidase. We modulate cellular iron homeostasis by applying cell permeable iron chelators desferrioxamine (DFO) and deferiprone (DFP). NADPH oxidase subunit gp91-phox level was analyzed by Western blotting. Our results show that Aβ25-35 induces strong ROS production through NADPH oxidase in Bv2 microglial cells. Intracellular iron depletion resulted in restrained Aβ25-35 induced ROS.
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Affiliation(s)
- Kristin Part
- School of Natural Sciences and Health, Tallinn University, Narva Mnt 29, 10120 Tallinn, Estonia.
| | - Kai Künnis-Beres
- School of Natural Sciences and Health, Tallinn University, Narva Mnt 29, 10120 Tallinn, Estonia; Laboratory of Molecular Genetics National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia.
| | - Helen Poska
- School of Natural Sciences and Health, Tallinn University, Narva Mnt 29, 10120 Tallinn, Estonia.
| | - Tiit Land
- School of Natural Sciences and Health, Tallinn University, Narva Mnt 29, 10120 Tallinn, Estonia.
| | - Ruth Shimmo
- School of Natural Sciences and Health, Tallinn University, Narva Mnt 29, 10120 Tallinn, Estonia.
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39
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Accardo A, Shalabaeva V, Di Cola E, Burghammer M, Krahne R, Riekel C, Dante S. Superhydrophobic Surfaces Boost Fibril Self-Assembly of Amyloid β Peptides. ACS APPLIED MATERIALS & INTERFACES 2015; 7:20875-20884. [PMID: 26306595 DOI: 10.1021/acsami.5b06219] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Amyloid β (Aβ) peptides are the main constituents of Alzheimer's amyloid plaques in the brain. Here we report how the unique microfluidic flows exerted by droplets sitting on superhydrophobic surfaces can influence the aggregation mechanisms of several Aβ fragments by boosting their fibril self-assembly. Aβ(25-35), Aβ(1-40), and Aβ(12-28) were dried both on flat hydrophilic surfaces (contact angle (CA) = 37.3°) and on nanostructured superhydrophobic ones (CA = 175.8°). By embedding nanoroughened surfaces on top of highly X-ray transparent Si3N4 membranes, it was possible to probe the solid residues by raster-scan synchrotron radiation X-ray microdiffraction (μXRD). As compared to residues obtained on flat Si3N4 membranes, a general enhancement of fibrillar material was detected for all Aβ fragments dried on superhydrophobic surfaces, with a particular emphasis on the shorter ones. Indeed, both Aβ(25-35) and Aβ(12-28) showed a marked crystalline cross-β phase with varying fiber textures. The homogeneous evaporation rate provided by these nanostructured supports, and the possibility to use transparent membranes, can open a wide range of in situ X-ray and spectroscopic characterizations of amyloidal peptides involved in neurodegenerative diseases and for the fabrication of amyloid-based nanodevices.
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Affiliation(s)
- Angelo Accardo
- Istituto Italiano di Tecnologia , Via Morego 30, Genova 16163, Italy
| | | | - Emanuela Di Cola
- The European Synchrotron, CS40220 , 38043 Cedex 9 Grenoble, France
| | - Manfred Burghammer
- The European Synchrotron, CS40220 , 38043 Cedex 9 Grenoble, France
- Department of Analytical Chemistry, Ghent University , Krijgslaan 281, Ghent 9000, Belgium
| | - Roman Krahne
- Istituto Italiano di Tecnologia , Via Morego 30, Genova 16163, Italy
| | - Christian Riekel
- The European Synchrotron, CS40220 , 38043 Cedex 9 Grenoble, France
| | - Silvia Dante
- Istituto Italiano di Tecnologia , Via Morego 30, Genova 16163, Italy
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40
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Liu X, Ye K, Weinshenker D. Norepinephrine Protects against Amyloid-β Toxicity via TrkB. J Alzheimers Dis 2015; 44:251-60. [PMID: 25208620 DOI: 10.3233/jad-141062] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The locus coeruleus (LC), the brainstem noradrenergic nucleus that is the sole source of norepinephrine (NE) in the forebrain, is one of the first structures affected in Alzheimer's disease (AD). Experimental ablation of the LC exacerbates, while increasing NE abates, AD-like neuropathology and cognitive deficits in animal models of the disease. Some neuroprotective effects of NE appear to be mediated by tropomyosin-related kinase B (TrkB), the canonical receptor for brain-derived neurotrophic factor (BDNF). Here, we report that NE dose-dependently protected primary cortical and LC neurons from amyloid-β (Aβ) toxicity. The neuroprotective effects of NE were fully prevented by the Trk receptor antagonist K252a but only partially attenuated by adrenergic receptor antagonists and not mimicked by adrenergic agonists. Activation of TrkB by NE in cortical and LC neurons was confirmed by immunoblot and immunocytochemistry for phospho-TrkB. These results indicate that NE can activate TrkB and protect against Aβ toxicity, at least in part, via adrenergic receptor-independent mechanisms, and have implications for the consequences of LC degeneration in AD and potential therapies for the disease.
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Affiliation(s)
- Xia Liu
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | - Keqiang Ye
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | - David Weinshenker
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA, USA
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41
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Tran L, Ha-Duong T. Exploring the Alzheimer amyloid-β peptide conformational ensemble: A review of molecular dynamics approaches. Peptides 2015; 69:86-91. [PMID: 25908410 DOI: 10.1016/j.peptides.2015.04.009] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 04/02/2015] [Accepted: 04/07/2015] [Indexed: 12/22/2022]
Abstract
Alzheimer's disease is one of the most common dementia among elderly worldwide. There is no therapeutic drugs until now to treat effectively this disease. One main reason is due to the poorly understood mechanism of Aβ peptide aggregation, which plays a crucial role in the development of Alzheimer's disease. It remains challenging to experimentally or theoretically characterize the secondary and tertiary structures of the Aβ monomer because of its high flexibility and aggregation propensity, and its conformations that lead to the aggregation are not fully identified. In this review, we highlight various structural ensembles of Aβ peptide revealed and characterized by computational approaches in order to find converging structures of Aβ monomer. Understanding how Aβ peptide forms transiently stable structures prior to aggregation will contribute to the design of new therapeutic molecules against the Alzheimer's disease.
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Affiliation(s)
- Linh Tran
- BioCIS, UMR CNRS 8076, LabEx LERMIT, Faculty of Pharmacy, University Paris Sud, 5 Rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France
| | - Tâp Ha-Duong
- BioCIS, UMR CNRS 8076, LabEx LERMIT, Faculty of Pharmacy, University Paris Sud, 5 Rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France.
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42
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Eufemi M, Cocchiola R, Romaniello D, Correani V, Di Francesco L, Fabrizi C, Maras B, Schininà ME. Acetylation and phosphorylation of STAT3 are involved in the responsiveness of microglia to beta amyloid. Neurochem Int 2015; 81:48-56. [PMID: 25633229 DOI: 10.1016/j.neuint.2015.01.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 01/15/2015] [Accepted: 01/20/2015] [Indexed: 10/24/2022]
Abstract
Microglia are macrophages within the central nervous system playing a central role in neurodegenerative disorders. Although the initial engagement of microglia seems to be neuroprotective, many lines of evidence indicate that its persistent activation contributes to dismantle neuronal activity and to induce neuronal loss. The molecular pathways that lead from amyloid interaction with membrane receptors to the microglial activation have been extensively investigated, although a definitive picture is not yet at hand. In this work, primary and immortalized microglial cells were treated with a synthetic form of Aβ peptides, and relative abundance of acetylated and phosphorylated STAT3 were assayed. Results highlight, for the first time, three distinctive sequential events: i) an earlier event marked by the increase in the level of STAT3 acetylated species, followed by ii) a later increase in the level of STAT3 phosphorylated form, and finally iii) an involvement of phosphorylated STAT3 in the increase in expression of the 14-3-3 epsilon, a protein frequently associated with neurodegenerative diseases and known to be a marker of Aβ-activated microglia. These data outline a complex, time-dependent modification of STAT3 signalling triggered by amyloid in the microglial compartments, that once confirmed by in vivo experiments will broaden the knowledge of the molecular basis of amyloid neurotoxicity.
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Affiliation(s)
- Margherita Eufemi
- Dipartimento di Scienze Biochimiche, Sapienza, University of Rome, P.le Aldo Moro, 5 00185 Rome, Italy
| | - Rossana Cocchiola
- Dipartimento di Scienze Biochimiche, Sapienza, University of Rome, P.le Aldo Moro, 5 00185 Rome, Italy
| | - Donatella Romaniello
- Dipartimento di Scienze Biochimiche, Sapienza, University of Rome, P.le Aldo Moro, 5 00185 Rome, Italy
| | - Virginia Correani
- Dipartimento di Scienze Biochimiche, Sapienza, University of Rome, P.le Aldo Moro, 5 00185 Rome, Italy
| | - Laura Di Francesco
- Dipartimento di Scienze Biochimiche, Sapienza, University of Rome, P.le Aldo Moro, 5 00185 Rome, Italy
| | - Cinzia Fabrizi
- Dipartimento di Scienze Anatomiche, Istologiche, Medico-Legali e dell'Apparato Locomotore, Sapienza, University of Rome, Via Borelli, 50 00161 Rome, Italy
| | - Bruno Maras
- Dipartimento di Scienze Biochimiche, Sapienza, University of Rome, P.le Aldo Moro, 5 00185 Rome, Italy
| | - M Eugenia Schininà
- Dipartimento di Scienze Biochimiche, Sapienza, University of Rome, P.le Aldo Moro, 5 00185 Rome, Italy.
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Correani V, Francesco LD, Cera I, Mignogna G, Giorgi A, Mazzanti M, Fumagalli L, Fabrizi C, Maras B, Schininà ME. Reversible redox modifications in the microglial proteome challenged by beta amyloid. MOLECULAR BIOSYSTEMS 2015; 11:1584-93. [DOI: 10.1039/c4mb00703d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Reversible redox modifications of the microglial proteome contribute to switching of these neuronal sentinel cells toward a neuroinflammatory phenotype.
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Affiliation(s)
- Virginia Correani
- Dipartimento di Scienze Biochimiche
- Sapienza University of Rome
- 00185 Rome
- Italy
| | - Laura Di Francesco
- Dipartimento di Scienze Biochimiche
- Sapienza University of Rome
- 00185 Rome
- Italy
| | - Isabella Cera
- Dipartimento di Scienze Biochimiche
- Sapienza University of Rome
- 00185 Rome
- Italy
| | - Giuseppina Mignogna
- Dipartimento di Scienze Biochimiche
- Sapienza University of Rome
- 00185 Rome
- Italy
| | - Alessandra Giorgi
- Dipartimento di Scienze Biochimiche
- Sapienza University of Rome
- 00185 Rome
- Italy
| | - Michele Mazzanti
- Dipartimento di Bioscienze
- Università degli Studi di Milano
- Milan
- Italy
| | - Lorenzo Fumagalli
- Dipartimento di Scienze Anatomiche
- Istologiche
- Medico-Legali e dell'Apparato Locomotore
- Sapienza University of Rome
- Rome
| | - Cinzia Fabrizi
- Dipartimento di Scienze Anatomiche
- Istologiche
- Medico-Legali e dell'Apparato Locomotore
- Sapienza University of Rome
- Rome
| | - Bruno Maras
- Dipartimento di Scienze Biochimiche
- Sapienza University of Rome
- 00185 Rome
- Italy
| | - M. Eugenia Schininà
- Dipartimento di Scienze Biochimiche
- Sapienza University of Rome
- 00185 Rome
- Italy
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Ralhan K, KrishnaKumar VG, Gupta S. Piperazine and DBU: a safer alternative for rapid and efficient Fmoc deprotection in solid phase peptide synthesis. RSC Adv 2015. [DOI: 10.1039/c5ra23441g] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We demonstrate PolyAla synthesis using 5% piperazine + 2% DBU, which significantly reduces deletion products arising due to incomplete Fmoc-deprotection and can be used for deletion-free assembly of aggregation prone difficult peptides.
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Affiliation(s)
- Krittika Ralhan
- Biological Engineering
- Indian Institute of Technology Gandhinagar
- Ahmedabad-382424
- India
| | - V. Guru KrishnaKumar
- Biological Engineering
- Indian Institute of Technology Gandhinagar
- Ahmedabad-382424
- India
| | - Sharad Gupta
- Biological Engineering
- Indian Institute of Technology Gandhinagar
- Ahmedabad-382424
- India
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45
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Peng J, Weng J, Ren L, Sun L. Interactions between gold nanoparticles and amyloid
β
25–35
peptide. IET Nanobiotechnol 2014; 8:295-303. [DOI: 10.1049/iet-nbt.2013.0071] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Affiliation(s)
- Jian Peng
- Department of BiomaterialsCollege of MaterialsXiamen UniversityXiamen 361005People's Republic of China
| | - Jian Weng
- Department of BiomaterialsCollege of MaterialsXiamen UniversityXiamen 361005People's Republic of China
| | - Lei Ren
- Department of BiomaterialsCollege of MaterialsXiamen UniversityXiamen 361005People's Republic of China
| | - Li‐Ping Sun
- Department of BiomaterialsCollege of MaterialsXiamen UniversityXiamen 361005People's Republic of China
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46
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Nell HJ, Whitehead SN, Cechetto DF. Age-Dependent Effect of β-Amyloid Toxicity on Basal Forebrain Cholinergic Neurons and Inflammation in the Rat Brain. Brain Pathol 2014; 25:531-42. [PMID: 25187042 DOI: 10.1111/bpa.12199] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 08/27/2014] [Indexed: 01/08/2023] Open
Abstract
Beta-amyloid (Aβ) accumulation, neuroinflammation, basal forebrain cholinergic loss and hippocampal degeneration are well-described pathologies associated with Alzheimer's disease (AD). However, the role that age plays in the susceptibility of the brain to these AD pathologies and the relationships between them is still not well understood. This study investigated the age-related response to intracerebroventricular injection of Aβ(25-35) in 3-, 6- and 9-month-old rats. Aβ toxicity resulted in an age-related increase in cholinergic loss and microglial activation in the basal forebrain along with neuronal loss in the hippocampal CA3 subfield. Performance in the Morris water maze revealed impairments in long-term reference memory in 6-month-old Aβ administered animals, which was not seen in 3-month-old animals. These results support a role of Aβ administration in inducing age-dependent cholinergic loss and neuroinflammation, and additionally provide evidence for a more age-appropriate model of adult-onset Aβ toxicity demonstrating pathological changes that reflect the early stages of AD pathogenesis including neuroinflammation, cholinergic loss and beginning stages of memory impairment.
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Affiliation(s)
- Hayley Joy Nell
- Department of Anatomy & Cell Biology, Western University, London, ON, Canada
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Martire S, Fuso A, Rotili D, Tempera I, Giordano C, De Zottis I, Muzi A, Vernole P, Graziani G, Lococo E, Faraldi M, Maras B, Scarpa S, Mosca L, d'Erme M. PARP-1 modulates amyloid beta peptide-induced neuronal damage. PLoS One 2013; 8:e72169. [PMID: 24086258 PMCID: PMC3782458 DOI: 10.1371/journal.pone.0072169] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Accepted: 07/08/2013] [Indexed: 01/31/2023] Open
Abstract
Amyloid beta peptide (Aβ) causes neurodegeneration by several mechanisms including oxidative stress, which is known to induce DNA damage with the consequent activation of poly (ADP-ribose) polymerase (PARP-1). To elucidate the role of PARP-1 in the neurodegenerative process, SH-SY5Y neuroblastoma cells were treated with Aβ25–35 fragment in the presence or absence of MC2050, a new PARP-1 inhibitor. Aβ25–35 induces an enhancement of PARP activity which is prevented by cell pre-treatment with MC2050. These data were confirmed by measuring PARP-1 activity in CHO cells transfected with amylod precursor protein and in vivo in brains specimens of TgCRND8 transgenic mice overproducing the amyloid peptide. Following Aβ25–35 exposure a significant increase in intracellular ROS was observed. These data were supported by the finding that Aβ25–35 induces DNA damage which in turn activates PARP-1. Challenge with Aβ25–35 is also able to activate NF-kB via PARP-1, as demonstrated by NF-kB impairment upon MC2050 treatment. Moreover, Aβ25–35via PARP-1 induces a significant increase in the p53 protein level and a parallel decrease in the anti-apoptotic Bcl-2 protein. These overall data support the hypothesis of PARP-1 involvment in cellular responses induced by Aβ and hence a possible rationale for the implication of PARP-1 in neurodegeneration is discussed.
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Affiliation(s)
- Sara Martire
- Department of Biochemical Sciences, Sapienza University, Rome, Italy
| | - Andrea Fuso
- Department of Psychology-Sec.Neuroscience, Sapienza University, Rome, Italy
| | - Dante Rotili
- Department of Pharmaceutical Studies, Sapienza University, Rome, Italy
| | - Italo Tempera
- Fels Institute for Cancer Research & Molecular Biology, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Cesare Giordano
- Department of Pharmaceutical Studies, Sapienza University, Rome, Italy
| | - Ivana De Zottis
- Department of Biochemical Sciences, Sapienza University, Rome, Italy
| | - Alessia Muzi
- Department of Neuroscience, University of Roma “Tor Vergata”, Rome, Italy
| | - Patrizia Vernole
- Department of Public Health and Cell Biology, University of Roma “Tor Vergata”, Rome, Italy
| | - Grazia Graziani
- Department of Neuroscience, University of Roma “Tor Vergata”, Rome, Italy
| | - Emanuela Lococo
- Department of Experimental Medicine, Sapienza University, Rome, Italy
| | - Martina Faraldi
- Department of Biochemical Sciences, Sapienza University, Rome, Italy
| | - Bruno Maras
- Department of Biochemical Sciences, Sapienza University, Rome, Italy
| | - Sigfrido Scarpa
- Department of Surgery “P.Valdoni”, Sapienza University, Rome, Italy
| | - Luciana Mosca
- Department of Biochemical Sciences, Sapienza University, Rome, Italy
| | - Maria d'Erme
- Department of Biochemical Sciences, Sapienza University, Rome, Italy
- Instituto Pasteur Fondazione Cenci Bolognetti, Sapienza University, Rome, Italy
- * E-mail:
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48
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Álvarez-Ruíz Y, Carrillo-Mora P. Amyloid beta 25–35 impairs reconsolidation of object recognition memory in rats and this effect is prevented by lithium carbonate. Neurosci Lett 2013; 548:79-83. [DOI: 10.1016/j.neulet.2013.06.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 05/30/2013] [Accepted: 06/02/2013] [Indexed: 10/26/2022]
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Role of β-hairpin formation in aggregation: the self-assembly of the amyloid-β(25-35) peptide. Biophys J 2013; 103:576-586. [PMID: 22947874 DOI: 10.1016/j.bpj.2012.06.027] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 06/12/2012] [Accepted: 06/14/2012] [Indexed: 12/28/2022] Open
Abstract
The amyloid-β(25-35) peptide plays a key role in the etiology of Alzheimer's disease due to its extreme toxicity even in the absence of aging. Because of its high tendency to aggregate and its low solubility in water, the structure of this peptide is still unknown. In this work, we sought to understand the early stages of aggregation of the amyloid-β(25-35) peptide by conducting simulations of oligomers ranging from monomers to tetramers. Our simulations show that although the monomer preferentially adopts a β-hairpin conformation, larger aggregates have extended structures, and a clear transition from compact β-hairpin conformations to extended β-strand structures occurs between dimers and trimers. Even though β-hairpins are not present in the final architecture of the fibril, our simulations indicate that they play a critical role in fibril growth. Our simulations also show that β-sheet structures are stabilized when a β-hairpin is present at the edge of the sheet. The binding of the hairpin to the sheet leads to a subsequent destabilization of the hairpin, with part of the hairpin backbone dangling in solution. This free section of the peptide can then recruit an extra monomer from solution, leading to further sheet extension. Our simulations indicate that the peptide must possess sufficient conformational flexibility to switch between a hairpin and an extended conformation in order for β-sheet extension to occur, and offer a rationalization for the experimental observation that overstabilizing a hairpin conformation in the monomeric state (for example, through chemical cross-linking) significantly hampers the fibrillization process.
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50
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Machicao F, Muresanu DF, Hundsberger H, Pflüger M, Guekht A. Pleiotropic neuroprotective and metabolic effects of Actovegin's mode of action. J Neurol Sci 2012; 322:222-7. [PMID: 22910148 DOI: 10.1016/j.jns.2012.07.069] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 07/29/2012] [Accepted: 07/30/2012] [Indexed: 01/09/2023]
Abstract
This article reviews the mechanisms of action of Actovegin in the context of its preclinical effects and new concepts in the pharmacological treatment of neurological disorders. Actovegin is an ultrafiltrate of calf blood, composed of more than 200 biological substances. The drug is used for a broad spectrum of diseases, including disturbances of peripheral and cerebral blood circulation, burns, impaired wound healing, radiation-induced damage and diabetic polyneuropathy. Actovegin is composed of small molecules present under normal physiological conditions, therefore pharmacokinetic and pharmacodynamic studies to determine its active substance are not feasible. Preclinical data have revealed that it improves metabolic balance by increasing glucose uptake and improving oxygen uptake under conditions of ischemia. Actovegin also resists the effects of gamma-irradiation and stimulates wound healing. More recent preclinical studies have suggested that anti-oxidative and anti-apoptotic mechanisms of action specifically underlie the neuroprotective properties of Actovegin. The drug has been found to exert these beneficial effects experimentally, in primary rat hippocampal neurons and in an STZ-rat model of diabetic polyneuropathy, while also providing evidence that it positively affects the functional recovery of neurons. Latest data suggest that Actovegin also has a positive influence on the NF-κB pathway, but many molecular and cellular pathways remain unexplored. In particular, Actovegin's influence on neuroplasticity, neurogenesis and neurotrophicity are questions that ideally should be answered by future research. Nevertheless, it is clear that the multifactorial and complex nature of Actovegin underlies its pleiotropic neuroprotective mechanisms of action and positive effect on clinical outcomes.
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Affiliation(s)
- Fausto Machicao
- Molecular Genetics and Diagnosis, Department of Internal Medicine IV, Otfried Müller Str. 10, University Hospital, D-72076 Tübingen, Germany.
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