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Cui Y, Ma X, Wei J, Chen C, Shakir N, Guirram H, Dai Z, Anderson T, Ferguson D, Qiu S. MET receptor tyrosine kinase promotes the generation of functional synapses in adult cortical circuits. Neural Regen Res 2025; 20:1431-1444. [PMID: 39075910 DOI: 10.4103/nrr.nrr-d-23-01471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 04/20/2024] [Indexed: 07/31/2024] Open
Abstract
JOURNAL/nrgr/04.03/01300535-202505000-00026/figure1/v/2024-07-28T173839Z/r/image-tiff Loss of synapse and functional connectivity in brain circuits is associated with aging and neurodegeneration, however, few molecular mechanisms are known to intrinsically promote synaptogenesis or enhance synapse function. We have previously shown that MET receptor tyrosine kinase in the developing cortical circuits promotes dendritic growth and dendritic spine morphogenesis. To investigate whether enhancing MET in adult cortex has synapse regenerating potential, we created a knockin mouse line, in which the human MET gene expression and signaling can be turned on in adult (10-12 months) cortical neurons through doxycycline-containing chow. We found that similar to the developing brain, turning on MET signaling in the adult cortex activates small GTPases and increases spine density in prefrontal projection neurons. These findings are further corroborated by increased synaptic activity and transient generation of immature silent synapses. Prolonged MET signaling resulted in an increased α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid/N-methyl-D-aspartate (AMPA/NMDA) receptor current ratio, indicative of enhanced synaptic function and connectivity. Our data reveal that enhancing MET signaling could be an interventional approach to promote synaptogenesis and preserve functional connectivity in the adult brain. These findings may have implications for regenerative therapy in aging and neurodegeneration conditions.
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Affiliation(s)
- Yuehua Cui
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Xiaokuang Ma
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Jing Wei
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Chang Chen
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Neha Shakir
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Hitesch Guirram
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Zhiyu Dai
- Department of Medicine, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Trent Anderson
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Deveroux Ferguson
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Shenfeng Qiu
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
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2
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Gonçalves PB, Sodero ACR, Cordeiro Y. Natural products targeting amyloid-β oligomer neurotoxicity in Alzheimer's disease. Eur J Med Chem 2024; 276:116684. [PMID: 39032401 DOI: 10.1016/j.ejmech.2024.116684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Revised: 07/07/2024] [Accepted: 07/12/2024] [Indexed: 07/23/2024]
Abstract
Alzheimer's disease (AD) constitutes a major global health issue, characterized by progressive neurodegeneration and cognitive impairment, for which no curative treatment is currently available. Current therapeutic approaches are focused on symptom management, highlighting the critical need for disease-modifying therapy. The hallmark pathology of AD involves the aggregation and accumulation of amyloid-β (Aβ) peptides in the brain. Consequently, drug discovery efforts in recent decades have centered on the Aβ aggregation cascade, which includes the transition of monomeric Aβ peptides into toxic oligomers and, ultimately, mature fibrils. Historically, anti-Aβ strategies focused on the clearance of amyloid fibrils using monoclonal antibodies. However, substantial evidence has highlighted the critical role of Aβ oligomers (AβOs) in AD pathogenesis. Soluble AβOs are now recognized as more toxic than fibrils, directly contributing to synaptic impairment, neuronal damage, and the onset of AD. Targeting AβOs has emerged as a promising therapeutic approach to mitigate cognitive decline in AD. Natural products (NPs) have demonstrated promise against AβO neurotoxicity through various mechanisms, including preventing AβO formation, enhancing clearance mechanisms, or converting AβOs into non-toxic species. Understanding the mechanisms by which anti-AβO NPs operate is useful for developing disease-modifying treatments for AD. In this review, we explore the role of NPs in mitigating AβO neurotoxicity for AD drug discovery, summarizing key evidence from biophysical methods, cellular assays, and animal models. By discussing how NPs modulate AβO neurotoxicity across various experimental systems, we aim to provide valuable insights into novel therapeutic strategies targeting AβOs in AD.
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Affiliation(s)
| | | | - Yraima Cordeiro
- Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, 21949-900, Brazil
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3
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Terpstra K, Huang Y, Na H, Sun L, Gutierrez C, Yu Z, Mirica LM. 2-Phenylbenzothiazolyl iridium complexes as inhibitors and probes of amyloid β aggregation. Dalton Trans 2024; 53:14258-14264. [PMID: 39129539 DOI: 10.1039/d4dt01691b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/13/2024]
Abstract
The aggregation of amyloid β (Aβ) peptides is a significant hallmark of Alzheimer's disease (AD), and the detection of Aβ aggregates and the inhibition of their formation are important for the diagnosis and treatment of AD, respectively. Herein, we report a series of benzothiazole-based Ir(III) complexes HN-1 to HN-8 that exhibit appreciable inhibition of Aβ aggregation in vitro and in living cells. These Ir(III) complexes can induce a significant fluorescence increase when binding to Aβ fibrils and Aβ oligomers, while their measured log D values suggest these compounds could have enhanced blood-brain barrier (BBB) permeability. In vivo studies show that HN-1, HN-2, HN-3, and HN-8 successfully penetrate the BBB and stain the amyloid plaques in AD mouse brains after a 10-day treatment, suggesting that these Ir(III) complexes could act as lead compounds for AD therapeutic and diagnostic agent development.
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Affiliation(s)
- Karna Terpstra
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, USA.
| | - Yiran Huang
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, USA.
| | - Hanah Na
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, USA.
| | - Liang Sun
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, USA.
| | - Citlali Gutierrez
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, USA.
| | - Zhengxin Yu
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, USA.
| | - Liviu M Mirica
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, USA.
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4
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Zhang L, Zhao J, Jiang G, Chen Z. Quinoline yellow acts as a novel amyloid fibrillation probe by using surface-enhanced Raman spectroscopy. Talanta 2024; 280:126685. [PMID: 39137661 DOI: 10.1016/j.talanta.2024.126685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 07/10/2024] [Accepted: 08/06/2024] [Indexed: 08/15/2024]
Abstract
Protein amyloid fibrillation is linked to a wide range of neurodegenerative diseases. Protein oligomer is an intermediate substance in the process of fibrillation, which is neurotoxic and formed by the aggregation of protein molecules under physiological stress. Early detection of protein oligomers could make timely intervention of protein fibrillation related diseases. Therefore, it is crucial to develop efficient inhibitors and probes for monitoring amyloid fibril formation. In this study, we developed a novel amyloid inhibitor quinoline yellow (QY), which was proved to be effective in inhibiting insulin protein fibrillation as demonstrated by fluorescence, morphology characterization and circular dichroism. When QY binds to insulin, it exerts inhibitory effects on the nucleation process and effectively impedes the formation of fibrillar fibrils. In addition, we present the application of surface-enhanced Raman spectroscopy (SERS) as an extremely sensitive technique for identifying amyloid oligomers. The investigation employed the probe QY, which demonstrated a linear reaction for identifying oligomers in the concentration range of 1.0-58.0 μM. Impressively, it showcased an exceptionally sensitive detection threshold of 0.2 μM. And also illustrating the binding sites and interaction mechanisms between small molecules of QY and insulin by SERS. The aforementioned methodology was also employed for the identification of insulin oligomers in human serum samples. Thereby, the proposed approach presenting a promising avenue with extensive implications in the realms of pharmaceutical exploration and disease diagnosis.
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Affiliation(s)
- Lixia Zhang
- School of Pharmacy, Shandong Second Medical University, Weifang, 261053, China.
| | - Junqi Zhao
- State Key Laboratory of Supramolecular Structure and Materials, Center for Supramolecular Chemical Biology, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, China
| | - Guangyu Jiang
- Cambridge Institute of Therapeutic Immunology & Infectious Disease (CITIID), Jeffrey Cheah Biomedical Centre, Department of Medicine, University of Cambridge, Cambridge, CB20AW, UK
| | - Zhijun Chen
- State Key Laboratory of Supramolecular Structure and Materials, Center for Supramolecular Chemical Biology, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, China.
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5
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Anitha K, Singh MK, Kohat K, Sri Varshini T, Chenchula S, Padmavathi R, Amerneni LS, Vishnu Vardhan K, Mythili Bai K, Chavan MR, Bhatt S. Recent Insights into the Neurobiology of Alzheimer's Disease and Advanced Treatment Strategies. Mol Neurobiol 2024:10.1007/s12035-024-04384-1. [PMID: 39102108 DOI: 10.1007/s12035-024-04384-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Accepted: 07/18/2024] [Indexed: 08/06/2024]
Abstract
In recent years, significant advancements have been made in understanding Alzheimer's disease from both neurobiological and clinical perspectives. Exploring the complex systems underlying AD has unveiled insights that could potentially revolutionize therapeutic approaches. Recent investigations have highlighted intricate interactions among genetic, molecular, and environmental factors in AD. Optimism arises from neurobiological advancements and diverse treatment options, potentially slowing or halting disease progression. Amyloid-beta plaques and tau protein tangles crucially influence AD onset and progression. Emerging treatments involve diverse strategies, such as approaches targeting multiple pathways involved in AD pathogenesis, such as inflammation, oxidative stress, and synaptic dysfunction pathways. Clinical trials using humanized monoclonal antibodies, focusing on immunotherapies eliminating amyloid-beta, have shown promise. Nonpharmacological interventions such as light therapy, electrical stimulation, cognitive training, physical activity, and dietary changes have drawn attention for their potential to slow cognitive aging and enhance brain health. Precision medicine, which involves tailoring therapies to individual genetic and molecular profiles, has gained traction. Ongoing research and interdisciplinary collaboration are expected to yield more effective treatments.
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Affiliation(s)
- Anitha K
- School of Pharmacy and Technology Management (SPTM), SVKM's Narsee Monjee Institute of Management Studies (NMIMS) Deemed to University, Shirpur, 425405, India
| | | | - Komal Kohat
- All India Institute of Medical Sciences, Madhya Pradesh, Bhopal, 462020, India
| | - Sri Varshini T
- All India Institute of Medical Sciences, Raipur, 462020, India
| | - Santenna Chenchula
- Department of Pharmacology, All India Institute of Medical Sciences, Bhopal, 462020, India.
| | - Padmavathi R
- SVS Medical College, Hyderabad, Telangana, India
| | | | - Vishnu Vardhan K
- All India Institute of Medical Sciences, Madhya Pradesh, Bhopal, 462020, India
| | | | - Madhav Rao Chavan
- All India Institute of Medical Sciences, Mangalagiri, Andhra Pradesh, India
| | - Shvetank Bhatt
- School of Health Sciences and Technology, MIT World Peace University, Dr. Vishwanath Karad, Pune, 411038, Maharashtra, India
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6
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Zampar S, Di Gregorio SE, Grimmer G, Watts JC, Ingelsson M. "Prion-like" seeding and propagation of oligomeric protein assemblies in neurodegenerative disorders. Front Neurosci 2024; 18:1436262. [PMID: 39161653 PMCID: PMC11330897 DOI: 10.3389/fnins.2024.1436262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Accepted: 07/17/2024] [Indexed: 08/21/2024] Open
Abstract
Intra- or extracellular aggregates of proteins are central pathogenic features in most neurodegenerative disorders. The accumulation of such proteins in diseased brains is believed to be the end-stage of a stepwise aggregation of misfolded monomers to insoluble cross-β fibrils via a series of differently sized soluble oligomers/protofibrils. Several studies have shown how α-synuclein, amyloid-β, tau and other amyloidogenic proteins can act as nucleating particles and thereby share properties with misfolded forms, or strains, of the prion protein. Although the roles of different protein assemblies in the respective aggregation cascades remain unclear, oligomers/protofibrils are considered key pathogenic species. Numerous observations have demonstrated their neurotoxic effects and a growing number of studies have indicated that they also possess seeding properties, enabling their propagation within cellular networks in the nervous system. The seeding behavior of oligomers differs between the proteins and is also affected by various factors, such as size, shape and epitope presentation. Here, we are providing an overview of the current state of knowledge with respect to the "prion-like" behavior of soluble oligomers for several of the amyloidogenic proteins involved in neurodegenerative diseases. In addition to providing new insight into pathogenic mechanisms, research in this field is leading to novel diagnostic and therapeutic opportunities for neurodegenerative diseases.
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Affiliation(s)
- Silvia Zampar
- Krembil Brain Institute, University Health Network, Toronto, ON, Canada
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada
| | - Sonja E. Di Gregorio
- Krembil Brain Institute, University Health Network, Toronto, ON, Canada
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada
| | - Gustavo Grimmer
- Krembil Brain Institute, University Health Network, Toronto, ON, Canada
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada
| | - Joel C. Watts
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada
| | - Martin Ingelsson
- Krembil Brain Institute, University Health Network, Toronto, ON, Canada
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
- Department of Medicine, University of Toronto, Toronto, ON, Canada
- Department of Public Health/Geriatrics, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
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7
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Kramer M, Hoang TH, Yang H, Shchyglo O, Böge J, Neubacher U, Colitti-Klausnitzer J, Manahan-Vaughan D. Intracerebral inoculation of healthy non-transgenic rats with a single aliquot of oligomeric amyloid-β (1-42) profoundly and progressively alters brain function throughout life. Front Aging Neurosci 2024; 16:1397901. [PMID: 39156737 PMCID: PMC11327071 DOI: 10.3389/fnagi.2024.1397901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Accepted: 07/09/2024] [Indexed: 08/20/2024] Open
Abstract
One of the puzzling aspects of sporadic Alzheimer's disease (AD) is how it commences. Changes in one key brain peptide, amyloid-beta (Aβ), accompany disease progression, but whether this comprises a trigger or a consequence of AD is still a topic of debate. It is clear however that the cerebral presence of oligomeric Aβ (1-42) is a key factor in early AD-pathogenesis. Furthermore, treatment of rodent brains with oligomeric Aβ (1-42) either in vitro or in vivo, acutely impairs hippocampal synaptic plasticity, creating a link between Aβ-pathology and learning impairments. Here, we show that a once-off inoculation of the brains of healthy adult rats with oligomeric Aβ (1-42) exerts debilitating effects on the long-term viability of the hippocampus, one of the primary targets of AD. Changes are progressive: months after treatment, synaptic plasticity, neuronal firing and spatial learning are impaired and expression of plasticity-related proteins are changed, in the absence of amyloid plaques. Early changes relate to activation of microglia, whereas later changes are associated with a reconstruction of astroglial morphology. These data suggest that a disruption of Aβ homeostasis may suffice to trigger an irreversible cascade, underlying progressive loss of hippocampal function, that parallels the early stages of AD.
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8
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Senapati S, Tripathi K, Awad K, Rahimipour S. Multifunctional Liposomes Targeting Amyloid-β Oligomers for Early Diagnosis and Therapy of Alzheimer's Disease. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2311670. [PMID: 38461531 DOI: 10.1002/smll.202311670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 02/14/2024] [Indexed: 03/12/2024]
Abstract
Early detection and treatment are crucial for Alzheimer's disease (AD) management. Current diagnostic and therapeutic methods focus on late-stage amyloid fibrils and plaques, overlooking toxic soluble amyloid β oligomers (AβOs) accumulating early in AD. A multifunctional liposome-based platform is designed for early diagnosis and therapy of AD, leveraging a novel self-assembled cyclic d,l-α-peptide (CP-2) that selectively targets AβOs. Biocompatible CP-2 conjugated liposomes (CP-2-LPs) effectively disrupt Aβ aggregation and mitigate Aβ-mediated toxicity in human neuroblastoma cells. In transgenic Caenorhabditis elegans AD models, CP-2-LPs significantly outperformed free CP-2 by improving cognitive and behavioral functions, extending lifespan, and reducing toxic AβO levels. Intravenous injection of fluorescently labeled CP-2-LPs reveals effective blood-brain barrier penetration, with significantly higher brain fluorescence in transgenic mice than WT, enabling precise diagnosis. These findings underscore CP-2-LPs as a valuable tool for early detection and targeted therapy in AD.
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Affiliation(s)
- Sudipta Senapati
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Kuldeep Tripathi
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Khadeja Awad
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Shai Rahimipour
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
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9
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Guan Y, Mei J, Gao X, Wang C, Jia M, Ahmad S, Muhammad FN, Ai H. Prediction of the 3D conformation of a small peptide vaccine targeting Aβ42 oligomers. Phys Chem Chem Phys 2024; 26:20087-20102. [PMID: 39007924 DOI: 10.1039/d4cp02078b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
The original etiology of Alzheimer's disease (AD) is the deposition of amyloid-beta (Aβ) proteins, which starts from the aggregation of the Aβ oligomers. The optimal therapeutic strategy targeting Aβ oligomer aggregation is the development of AD vaccines. Despite the fact that positive progress has been made for experimental attempts at AD vaccines, the physicochemical and even structural properties of these AD vaccines remain unclear. In this study, through immunoinformatic and molecular dynamics (MD) simulations, we first designed and simulated an alternative of vaccine TAPAS and found that the structure of the alternative can reproduce the 3D conformation of TAPAS determined experimentally. Meanwhile, immunoinformatic methods were used to analyze the physicochemical properties of TAPAS, including immunogenicity, antigenicity, thermal stability, and solubility, which confirm well the efficacy and safety of the vaccine, and validate the scheme reliability of immunoinformatic and MD simulations in designing and simulating the TAPAS vaccine. Using the same scheme, we predicted the 3D conformation of the optimized ACI-24 peptide vaccine, an Aβ peptide with the first 15 residues of Aβ42 (Aβ1-15). The vaccine was verified once to be effective against both full-length Aβ1-42 and truncated Aβ4-42 aggregates, but an experimental 3D structure was absent. We have also explored the immune mechanism of the vaccine at the molecular level and found that the optimized ACI-24 and its analogues can block the growth of either full-length Aβ1-42 or truncated Aβ4-42 pentamer by contacting the hydrophobic residues within the N-terminus and β1 region on the contact surface of either pentamer. Additionally, residues (D1, D7, S8, H13, and Q15) were identified as the key residues of the vaccine to contact either of the two Aβ oligomers. This work provides a feasible implementation scheme of immunoinformatic and MD simulations for the development of AD small peptide vaccines, validating the power of the scheme as a parallel tool to the experimental approaches and injecting molecular-level information into the understanding and design of anti-AD vaccines.
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Affiliation(s)
- Yvning Guan
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China.
| | - Jinfei Mei
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China.
| | - Xvzhi Gao
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China.
| | - Chuanbo Wang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China.
| | - Mengke Jia
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China.
| | - Sajjad Ahmad
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China.
| | - Fahad Nouman Muhammad
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China.
| | - Hongqi Ai
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China.
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10
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Haynes JR, Whitmore CA, Behof WJ, Landman CA, Ong HH, Feld AP, Suero IC, Greer CB, Gore JC, Wijesinghe P, Matsubara JA, Wadzinski BE, Spiller BW, Pham W. Targeting soluble amyloid-beta oligomers with a novel nanobody. Sci Rep 2024; 14:16086. [PMID: 38992064 PMCID: PMC11239946 DOI: 10.1038/s41598-024-66970-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Accepted: 07/05/2024] [Indexed: 07/13/2024] Open
Abstract
The classical amyloid cascade hypothesis postulates that the aggregation of amyloid plaques and the accumulation of intracellular hyperphosphorylated Tau tangles, together, lead to profound neuronal death. However, emerging research has demonstrated that soluble amyloid-β oligomers (SAβOs) accumulate early, prior to amyloid plaque formation. SAβOs induce memory impairment and disrupt cognitive function independent of amyloid-β plaques, and even in the absence of plaque formation. This work describes the development and characterization of a novel anti-SAβO (E3) nanobody generated from an alpaca immunized with SAβO. In-vitro assays and in-vivo studies using 5XFAD mice indicate that the fluorescein (FAM)-labeled E3 nanobody recognizes both SAβOs and amyloid-β plaques. The E3 nanobody traverses across the blood-brain barrier and binds to amyloid species in the brain of 5XFAD mice. Imaging of mouse brains reveals that SAβO and amyloid-β plaques are not only different in size, shape, and morphology, but also have a distinct spatial distribution in the brain. SAβOs are associated with neurons, while amyloid plaques reside in the extracellular matrix. The results of this study demonstrate that the SAβO nanobody can serve as a diagnostic agent with potential theragnostic applications in Alzheimer's disease.
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Affiliation(s)
- Justin R Haynes
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Clayton A Whitmore
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - William J Behof
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Charlotte A Landman
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Henry H Ong
- Department of Biomedical Informatics, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Andrew P Feld
- Department of Pharmacology, Vanderbilt University, Nashville, TN, 37232, USA
| | - Isabelle C Suero
- Department of Pharmacology, Vanderbilt University, Nashville, TN, 37232, USA
| | - Celeste B Greer
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN, 37232, USA
| | - John C Gore
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN, 37232, USA
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, USA
- Vanderbilt Ingram Cancer Center, Nashville, TN, 37232, USA
- Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, TN, 37232, USA
| | - Printha Wijesinghe
- Department of Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, BC, V5Z3N9, Canada
| | - Joanne A Matsubara
- Department of Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, BC, V5Z3N9, Canada
| | - Brian E Wadzinski
- Department of Pharmacology, Vanderbilt University, Nashville, TN, 37232, USA.
- Vanderbilt Ingram Cancer Center, Nashville, TN, 37232, USA.
| | - Benjamin W Spiller
- Department of Pharmacology, Vanderbilt University, Nashville, TN, 37232, USA.
- Vanderbilt Center for Structural Biology, Vanderbilt University, Nashville, TN, 37235, USA.
| | - Wellington Pham
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, 37232, USA.
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, 37232, USA.
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN, 37232, USA.
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, USA.
- Vanderbilt Ingram Cancer Center, Nashville, TN, 37232, USA.
- Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, TN, 37232, USA.
- Vanderbilt Institute of Nanoscale Science and Engineering, Vanderbilt University, Nashville, TN, 37235, USA.
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, 37212, USA.
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11
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Yadav S, Deepika, Moar K, Kumar A, Khola N, Pant A, Kakde GS, Maurya PK. Reconsidering red blood cells as the diagnostic potential for neurodegenerative disorders. Biol Cell 2024; 116:e2400019. [PMID: 38822416 DOI: 10.1111/boc.202400019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 04/12/2024] [Accepted: 04/29/2024] [Indexed: 06/03/2024]
Abstract
BACKGROUND Red blood cells (RBCs) are usually considered simple cells and transporters of gases to tissues. HYPOTHESIS However, recent research has suggested that RBCs may have diagnostic potential in major neurodegenerative disorders (NDDs). RESULTS This review summarizes the current knowledge on changes in RBC in Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, and other NDDs. It discusses the deposition of neuronal proteins like amyloid-β, tau, and α-synuclein, polyamines, changes in the proteins of RBCs like band-3, membrane transporter proteins, heat shock proteins, oxidative stress biomarkers, and altered metabolic pathways in RBCs during neurodegeneration. It also highlights the comparison of RBC diagnostic markers to other in-market diagnoses and discusses the challenges in utilizing RBCs as diagnostic tools, such as the need for standardized protocols and further validation studies. SIGNIFICANCE STATEMENT The evidence suggests that RBCs have diagnostic potential in neurodegenerative disorders, and this study can pave the foundation for further research which may lead to the development of novel diagnostic approaches and treatments.
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Affiliation(s)
- Somu Yadav
- Department of Biochemistry, Central University of Haryana, Mahendergarh, India
| | - Deepika
- Department of Biochemistry, Central University of Haryana, Mahendergarh, India
| | - Kareena Moar
- Department of Biochemistry, Central University of Haryana, Mahendergarh, India
| | - Akshay Kumar
- Department of Biochemistry, Central University of Haryana, Mahendergarh, India
| | - Nikhila Khola
- Department of Biochemistry, Central University of Haryana, Mahendergarh, India
| | - Anuja Pant
- Department of Biochemistry, Central University of Haryana, Mahendergarh, India
| | - Ganseh S Kakde
- Department of Biochemistry, Central University of Haryana, Mahendergarh, India
| | - Pawan Kumar Maurya
- Department of Biochemistry, Central University of Haryana, Mahendergarh, India
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12
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Bezerra JR, de Souza Nascimento T, Tavares J, de Aguiar MSS, Maia MVV, de Andrade GM. Neuroprotective Effect of Chlorogenic Acid in an Animal Model of Sporadic Alzheimer's Disease Induced by Streptozotocin. Mol Neurobiol 2024:10.1007/s12035-024-04299-x. [PMID: 38898198 DOI: 10.1007/s12035-024-04299-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 06/06/2024] [Indexed: 06/21/2024]
Abstract
Alzheimer's Disease is a degenerative neurological condition which leads to a decline in memory and cognitive function. Chlorogenic Acid (CGA) presents properties including neuroprotective, antioxidant and anti-inflammatory. The aim of this study was to examine the impact of CGA on cognitive impairments, neuroinflammation and neuronal damage in mice submitted to an experimental model of Sporadic Alzheimer Disease (SAD) induced by intracerebroventricular administration of streptozotocin (ICV-STZ). Male Swiss mice received bilateral ICV-STZ injections (3 mg/Kg) on days 1 and 3. The treatment with CGA (5 mg/Kg, orally) or vehicle (water, orally), was initiated and continued for 26 days, starting 2 h after the second induction procedure. At first, there was no change in serum glucose levels after SAD induction. ICV-STZ induces impairments in aversive, recognition, and spatial memory, while CGA treatment significantly alleviated these memory deficits. Furthermore, locomotor activity, working memory, and anxiety-related activities remained unaffected by the treatments. CGA treatment protects against ICV-STZ-induced increase in the nitrite/nitrate and TBARS levels. ICV-STZ induced a reduction in viable cells, depletion of BDNF, and triggered astrogliosis and microgliosis in the cortex and hippocampus. Treatment with CGA preserves viable cell count in the prefrontal cortex, CA1, and CA3 regions of the hippocampus. Additionally, it prevented BDNF depletion in the prefrontal cortex and hippocampus (CA1, CA3, and DG regions), and mitigated astrogliosis and microgliosis in the prefrontal cortex and hippocampus (CA1, CA3, and DG regions). These findings indicate the neuroprotective effects of CGA, underscoring their potential as therapeutic agents or adjuncts in the treatment of SAD.
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Affiliation(s)
- Jéssica Rabelo Bezerra
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceara, Rua Cel. Nunes de Melo 1127, Porangabussu, Fortaleza, Ceará, 60430-270, Brazil
- Laboratory of Neuroscience and Behavior, Drug Research and Development Center (NPDM), , Federal University of Ceará, Rua Coronel Nunes de Melo 1127, Porangabussu, Fortaleza, Ceará, 60430-270, Brazil
| | - Tyciane de Souza Nascimento
- Department of Clinical Medicine, Faculty of Medicine, Federal University of Ceara, Rua Costa Mendes, Porangabussu, Fortaleza, Ceará, 160860430-140, Brazil
- Laboratory of Neuroscience and Behavior, Drug Research and Development Center (NPDM), , Federal University of Ceará, Rua Coronel Nunes de Melo 1127, Porangabussu, Fortaleza, Ceará, 60430-270, Brazil
| | - Juliete Tavares
- Department of Clinical Medicine, Faculty of Medicine, Federal University of Ceara, Rua Costa Mendes, Porangabussu, Fortaleza, Ceará, 160860430-140, Brazil
- Laboratory of Neuroscience and Behavior, Drug Research and Development Center (NPDM), , Federal University of Ceará, Rua Coronel Nunes de Melo 1127, Porangabussu, Fortaleza, Ceará, 60430-270, Brazil
| | - Mayara Sandrielly Soares de Aguiar
- Department of Clinical Medicine, Faculty of Medicine, Federal University of Ceara, Rua Costa Mendes, Porangabussu, Fortaleza, Ceará, 160860430-140, Brazil
- Laboratory of Neuroscience and Behavior, Drug Research and Development Center (NPDM), , Federal University of Ceará, Rua Coronel Nunes de Melo 1127, Porangabussu, Fortaleza, Ceará, 60430-270, Brazil
| | - Maiara Virgínia Viana Maia
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceara, Rua Cel. Nunes de Melo 1127, Porangabussu, Fortaleza, Ceará, 60430-270, Brazil
| | - Geanne Matos de Andrade
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceara, Rua Cel. Nunes de Melo 1127, Porangabussu, Fortaleza, Ceará, 60430-270, Brazil.
- Department of Clinical Medicine, Faculty of Medicine, Federal University of Ceara, Rua Costa Mendes, Porangabussu, Fortaleza, Ceará, 160860430-140, Brazil.
- Laboratory of Neuroscience and Behavior, Drug Research and Development Center (NPDM), , Federal University of Ceará, Rua Coronel Nunes de Melo 1127, Porangabussu, Fortaleza, Ceará, 60430-270, Brazil.
- Neuroscience and Behavior Lab, Drug Research and Development Center (NPDM), Federal University of Ceara, Rua Coronel Nunes de Melo, 1000, Fortaleza, CE, 60.430-275, Brazil.
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13
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Dear A, Thacker D, Wennmalm S, Ortigosa-Pascual L, Andrzejewska EA, Meisl G, Linse S, Knowles TPJ. Aβ Oligomer Dissociation Is Catalyzed by Fibril Surfaces. ACS Chem Neurosci 2024; 15:2296-2307. [PMID: 38785363 PMCID: PMC11157482 DOI: 10.1021/acschemneuro.4c00127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/21/2024] [Accepted: 04/23/2024] [Indexed: 05/25/2024] Open
Abstract
Oligomeric assemblies consisting of only a few protein subunits are key species in the cytotoxicity of neurodegenerative disorders, such as Alzheimer's and Parkinson's diseases. Their lifetime in solution and abundance, governed by the balance of their sources and sinks, are thus important determinants of disease. While significant advances have been made in elucidating the processes that govern oligomer production, the mechanisms behind their dissociation are still poorly understood. Here, we use chemical kinetic modeling to determine the fate of oligomers formed in vitro and discuss the implications for their abundance in vivo. We discover that oligomeric species formed predominantly on fibril surfaces, a broad class which includes the bulk of oligomers formed by the key Alzheimer's disease-associated Aβ peptides, also dissociate overwhelmingly on fibril surfaces, not in solution as had previously been assumed. We monitor this "secondary nucleation in reverse" by measuring the dissociation of Aβ42 oligomers in the presence and absence of fibrils via two distinct experimental methods. Our findings imply that drugs that bind fibril surfaces to inhibit oligomer formation may also inhibit their dissociation, with important implications for rational design of therapeutic strategies for Alzheimer's and other amyloid diseases.
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Affiliation(s)
- Alexander
J. Dear
- Biochemistry
and Structural Biology, Lund University, Lund 221 00, Sweden
- Centre
for Misfolding Diseases Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
| | - Dev Thacker
- Biochemistry
and Structural Biology, Lund University, Lund 221 00, Sweden
| | - Stefan Wennmalm
- Department
of Applied Physics, Biophysics Group, SciLifeLab, Royal Institute of Technology-KTH, Solna 171 65, Sweden
| | | | - Ewa A. Andrzejewska
- Centre
for Misfolding Diseases Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
| | - Georg Meisl
- Centre
for Misfolding Diseases Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
| | - Sara Linse
- Biochemistry
and Structural Biology, Lund University, Lund 221 00, Sweden
| | - Tuomas P. J. Knowles
- Centre
for Misfolding Diseases Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
- Cavendish
Laboratory, University of Cambridge, J J Thomson Avenue, Cambridge CB3 0HE, U.K.
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14
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Gómez-Castro CZ, Quintanar L, Vela A. An N-terminal acidic β-sheet domain is responsible for the metal-accumulation properties of amyloid-β protofibrils: a molecular dynamics study. J Biol Inorg Chem 2024; 29:407-425. [PMID: 38811408 PMCID: PMC11186886 DOI: 10.1007/s00775-024-02061-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 04/10/2024] [Indexed: 05/31/2024]
Abstract
The influence of metal ions on the structure of amyloid- β (Aβ) protofibril models was studied through molecular dynamics to explore the molecular mechanisms underlying metal-induced Aβ aggregation relevant in Alzheimer's disease (AD). The models included 36-, 48-, and 188-mers of the Aβ42 sequence and two disease-modifying variants. Primary structural effects were observed at the N-terminal domain, as it became susceptible to the presence of cations. Specially when β-sheets predominate, this motif orients N-terminal acidic residues toward one single face of the β-sheet, resulting in the formation of an acidic region that attracts cations from the media and promotes the folding of the N-terminal region, with implications in amyloid aggregation. The molecular phenotype of the protofibril models based on Aβ variants shows that the AD-causative D7N mutation promotes the formation of N-terminal β-sheets and accumulates more Zn2+, in contrast to the non-amyloidogenic rodent sequence that hinders the β-sheets and is more selective for Na+ over Zn2+ cations. It is proposed that forming an acidic β-sheet domain and accumulating cations is a plausible molecular mechanism connecting the elevated affinity and concentration of metals in Aβ fibrils to their high content of β-sheet structure at the N-terminal sequence.
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Affiliation(s)
- Carlos Z Gómez-Castro
- Conahcyt-Universidad Autónoma del Estado de Hidalgo, Km 4.5 Carr. Pachuca-Tulancingo, Mineral de La Reforma, 42184, Hidalgo, Mexico.
| | - Liliana Quintanar
- Department of Chemistry, Cinvestav, Av. Instituto Politécnico Nacional 2508, CDMX, San Pedro Zacatenco, 07360, Gustavo A. Madero, Mexico.
| | - Alberto Vela
- Department of Chemistry, Cinvestav, Av. Instituto Politécnico Nacional 2508, CDMX, San Pedro Zacatenco, 07360, Gustavo A. Madero, Mexico.
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15
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Li H, Zhao Z, Fassini A, Lee HK, Green RJ, Gomperts SN. Impaired Hippocampal Reactivation Preceding Robust Aβ Deposition in a Model of Alzheimer's Disease. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.26.595168. [PMID: 38853978 PMCID: PMC11160633 DOI: 10.1101/2024.05.26.595168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
Current therapeutic strategies for Alzheimer's disease (AD) target amyloid-beta (Aβ) fibrils and high molecular weight protofibrils associated with plaques, but other bioactive species may directly contribute to neural systems failure in AD. Employing hippocampal electrophysiological recordings and dynamic calcium imaging across the sleep-wake cycle in young mice expressing human Aβ and Aβ oligomers, we reveal marked impairments of hippocampal function long before amyloid plaques predominate. In slow wave sleep (SWS), Aβ increased the proportion of hypoactive cells and reduced place-cell reactivation. During awake behavior, Aβ impaired theta-gamma phase-amplitude coupling (PAC) and drove excessive synchronization of place cell calcium fluctuations with hippocampal theta. Remarkably, the on-line impairment of hippocampal theta-gamma PAC correlated with the SWS impairment of place-cell reactivation. Together, these results identify toxic effects of Aβ on memory encoding and consolidation processes before robust plaque deposition and support targeting soluble Aβ-related species to treat and prevent AD.
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Affiliation(s)
- Hanyan Li
- Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Zhuoyang Zhao
- Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Aline Fassini
- Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Han K. Lee
- Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Reese J. Green
- Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Stephen N. Gomperts
- Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
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16
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Karunarathne K, Kee TR, Jeon H, Cazzaro S, Gamage YI, Pan J, Woo JAA, Kang DE, Muschol M. Crystal Violet Selectively Detects Aβ Oligomers but Not Fibrils In Vitro and in Alzheimer's Disease Brain Tissue. Biomolecules 2024; 14:615. [PMID: 38927020 PMCID: PMC11201545 DOI: 10.3390/biom14060615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 05/02/2024] [Accepted: 05/05/2024] [Indexed: 06/28/2024] Open
Abstract
Deposition of extracellular Amyloid Beta (Aβ) and intracellular tau fibrils in post-mortem brains remains the only way to conclusively confirm cases of Alzheimer's Disease (AD). Substantial evidence, though, implicates small globular oligomers instead of fibrils as relevant biomarkers of, and critical contributors to, the clinical symptoms of AD. Efforts to verify and utilize amyloid oligomers as AD biomarkers in vivo have been limited by the near-exclusive dependence on conformation-selective antibodies for oligomer detection. While antibodies have yielded critical evidence for the role of both Aβ and tau oligomers in AD, they are not suitable for imaging amyloid oligomers in vivo. Therefore, it would be desirable to identify a set of oligomer-selective small molecules for subsequent development into Positron Emission Tomography (PET) probes. Using a kinetics-based screening assay, we confirm that the triarylmethane dye Crystal Violet (CV) is oligomer-selective for Aβ42 oligomers (AβOs) grown under near-physiological solution conditions in vitro. In postmortem brains of an AD mouse model and human AD patients, we demonstrate that A11 antibody-positive oligomers but not Thioflavin S (ThioS)-positive fibrils colocalize with CV staining, confirming in vitro results. Therefore, our kinetic screen represents a robust approach for identifying new classes of small molecules as candidates for oligomer-selective dyes (OSDs). Such OSDs, in turn, provide promising starting points for the development of PET probes for pre-mortem imaging of oligomer deposits in humans.
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Affiliation(s)
| | - Teresa R. Kee
- Department of Molecular Medicine, USF Health, Morsani College of Medicine, Tampa, FL 33620, USA
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Hanna Jeon
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Sara Cazzaro
- Department of Molecular Medicine, USF Health, Morsani College of Medicine, Tampa, FL 33620, USA
| | - Yasith I. Gamage
- Department of Physics, University of South Florida, Tampa, FL 33620, USA
| | - Jianjun Pan
- Department of Physics, University of South Florida, Tampa, FL 33620, USA
| | - Jung-A. A. Woo
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
| | - David E. Kang
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Martin Muschol
- Department of Physics, University of South Florida, Tampa, FL 33620, USA
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17
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Fonseca CS, Baker SL, Dobyns L, Janabi M, Jagust WJ, Harrison TM. Tau accumulation and atrophy predict amyloid independent cognitive decline in aging. Alzheimers Dement 2024; 20:2526-2537. [PMID: 38334195 PMCID: PMC11032527 DOI: 10.1002/alz.13654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 11/15/2023] [Accepted: 11/30/2023] [Indexed: 02/10/2024]
Abstract
INTRODUCTION Amyloid beta (Aβ) and tau pathology are cross-sectionally associated with atrophy and cognitive decline in aging and Alzheimer's disease (AD). METHODS We investigated relationships between concurrent longitudinal measures of Aβ (Pittsburgh compound B [PiB] positron emission tomography [PET]), tau (flortaucipir [FTP] PET), atrophy (structural magnetic resonance imaging), episodic memory (EM), and non-memory (NM) in 78 cognitively healthy older adults (OA). RESULTS Entorhinal FTP change was correlated with EM decline regardless of Aβ, but meta-temporal FTP and global PiB change were only associated with EM and NM decline in Aβ+ OA. Voxel-wise analyses revealed significant associations between temporal lobe FTP change and EM decline in all groups. PiB and FTP change were not associated with structural change, suggesting a functional or microstructural mechanism linking these measures to cognitive decline. DISCUSSION Our results show that longitudinal Aβ is linked to cognitive decline only in the presence of elevated Aβ, but longitudinal temporal lobe tau is associated with memory decline regardless of Aβ status. HIGHLIGHTS Entorhinal tau change was associated with memory decline in older adults (OA), regardless of amyloid beta (Aβ). Greater meta-region of interest (ROI) tau change correlated with memory decline in Aβ+ OA. Voxel-wise temporal tau change correlated with memory decline, regardless of Aβ. Meta-ROI tau and global amyloid change correlated with non-memory change in Aβ+ OA. Tau and amyloid accumulation were not associated with structural change in OA.
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Affiliation(s)
- Corrina S. Fonseca
- Helen Wills Neuroscience InstituteUniversity of CaliforniaBerkeleyCaliforniaUSA
| | | | - Lindsey Dobyns
- Helen Wills Neuroscience InstituteUniversity of CaliforniaBerkeleyCaliforniaUSA
| | - Mustafa Janabi
- Lawrence Berkeley National LaboratoryBerkeleyCaliforniaUSA
| | - William J. Jagust
- Helen Wills Neuroscience InstituteUniversity of CaliforniaBerkeleyCaliforniaUSA
- Lawrence Berkeley National LaboratoryBerkeleyCaliforniaUSA
| | - Theresa M. Harrison
- Helen Wills Neuroscience InstituteUniversity of CaliforniaBerkeleyCaliforniaUSA
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18
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Akhtar A, Singh S, Kaushik R, Awasthi R, Behl T. Types of memory, dementia, Alzheimer's disease, and their various pathological cascades as targets for potential pharmacological drugs. Ageing Res Rev 2024; 96:102289. [PMID: 38582379 DOI: 10.1016/j.arr.2024.102289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 03/30/2024] [Accepted: 03/30/2024] [Indexed: 04/08/2024]
Abstract
Alzheimer's disease (AD) is the most common type of dementia accounting for 90% of cases; however, frontotemporal dementia, vascular dementia, etc. prevails only in a minority of populations. The term dementia is defined as loss of memory which further takes several other categories of memories like working memory, spatial memory, fear memory, and long-term, and short-term memory into consideration. In this review, these memories have critically been elaborated based on context, duration, events, appearance, intensity, etc. The most important part and purpose of the review is the various pathological cascades as well as molecular levels of targets of AD, which have extracellular amyloid plaques and intracellular hyperphosphorylated tau protein as major disease hallmarks. There is another phenomenon that either leads to or arises from the above-mentioned hallmarks, such as oxidative stress, mitochondrial dysfunction, neuroinflammation, cholinergic dysfunction, and insulin resistance. Several potential drugs like antioxidants, anti-inflammatory drugs, acetylcholinesterase inhibitors, insulin mimetics or sensitizers, etc. studied in various previous preclinical or clinical reports were put as having the capacity to act on these pathological targets. Additionally, agents directly or indirectly targeting amyloid and tau were also discussed. This could be further investigated in future research.
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Affiliation(s)
- Ansab Akhtar
- Louisiana State University Health Sciences Center, Neuroscience Center of Excellence, School of Medicine, New Orleans, LA 70112, USA.
| | - Siddharth Singh
- School of Health Sciences & Technology, UPES University, Bidholi, Dehradun, Uttarakhand 248007, India
| | - Ravinder Kaushik
- School of Health Sciences & Technology, UPES University, Bidholi, Dehradun, Uttarakhand 248007, India
| | - Rajendra Awasthi
- School of Health Sciences & Technology, UPES University, Bidholi, Dehradun, Uttarakhand 248007, India
| | - Tapan Behl
- Amity School of Pharmaceutical Sciences, Amity University, Mohali, Punjab 140306, India
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19
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Wu Y, Yang J, Geng Y, Jiao X, Lu Z, Zhang T, Zhao R, Guo J, Wang W, Wang J, Zhang X. A Biomimic Nanobullet with Ameliorative Inflammatory Microenvironment for Alzheimer's Disease Treatments. Adv Healthc Mater 2024; 13:e2302851. [PMID: 37934884 DOI: 10.1002/adhm.202302851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 10/23/2023] [Indexed: 11/09/2023]
Abstract
Aβ oligomers, formed prior to diagnostic marker-amyloid β (Aβ) plaques, can damage neurons and trigger neuroinflammation, which accelerate the neuronal injury in Alzheimer's disease (AD). Herein, the combination of eliminating the Aβ oligomers and alleviating the inflammation is a promising therapeutic strategy for AD. However, the presence of the blood-brain barrier (BBB) and the intrinsic deficiencies of the drugs severely restrict their therapeutic effects. Inspired by the properties of rabies virus, a biomimic nanobullet (PBACR@NRs/SA) targeting neurons has been developed. The biomimic nanobullets possess the BBB penetrating character based on iron oxide nanorods; it can sequentially release rosmarinic acid and small interfering RNA targeting NF-κB triggered by microenvironment, which improve the microenvironment inflammation and realize the cure for AD. Compared with non-biomimic systems, the biomimic nanobullets exhibit a less caveolin-dependent internalization pathway, which reduces ROS production and mitochondrial fission in neurons. Therefore, the biomimic nanobullet is hopeful for the treatment of ADs and provides a promising platform for other brain diseases' treatments.
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Affiliation(s)
- Yanyue Wu
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jun Yang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yiwan Geng
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiyue Jiao
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Zhiguo Lu
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Tianlu Zhang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Ruichen Zhao
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jing Guo
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Wenli Wang
- Key Laboratory of Innovative Drug Development and Evaluation, School of Pharmacy, Hebei Medical University, Shijiazhuang, 050017, P. R. China
| | - Jing Wang
- Key Laboratory of Innovative Drug Development and Evaluation, School of Pharmacy, Hebei Medical University, Shijiazhuang, 050017, P. R. China
| | - Xin Zhang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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20
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Rinauro DJ, Chiti F, Vendruscolo M, Limbocker R. Misfolded protein oligomers: mechanisms of formation, cytotoxic effects, and pharmacological approaches against protein misfolding diseases. Mol Neurodegener 2024; 19:20. [PMID: 38378578 PMCID: PMC10877934 DOI: 10.1186/s13024-023-00651-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 08/17/2023] [Indexed: 02/22/2024] Open
Abstract
The conversion of native peptides and proteins into amyloid aggregates is a hallmark of over 50 human disorders, including Alzheimer's and Parkinson's diseases. Increasing evidence implicates misfolded protein oligomers produced during the amyloid formation process as the primary cytotoxic agents in many of these devastating conditions. In this review, we analyze the processes by which oligomers are formed, their structures, physicochemical properties, population dynamics, and the mechanisms of their cytotoxicity. We then focus on drug discovery strategies that target the formation of oligomers and their ability to disrupt cell physiology and trigger degenerative processes.
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Affiliation(s)
- Dillon J Rinauro
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
| | - Fabrizio Chiti
- Section of Biochemistry, Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134, Florence, Italy
| | - Michele Vendruscolo
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK.
| | - Ryan Limbocker
- Department of Chemistry and Life Science, United States Military Academy, West Point, NY, 10996, USA.
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21
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Abdelhamid M, Jung CG, Zhou C, Inoue R, Chen Y, Sento Y, Hida H, Michikawa M. Potential Therapeutic Effects of Bifidobacterium breve MCC1274 on Alzheimer's Disease Pathologies in AppNL-G-F Mice. Nutrients 2024; 16:538. [PMID: 38398861 PMCID: PMC10893354 DOI: 10.3390/nu16040538] [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: 01/24/2024] [Revised: 02/08/2024] [Accepted: 02/13/2024] [Indexed: 02/25/2024] Open
Abstract
We previously demonstrated that orally supplemented Bifidobacterium breve MCC1274 (B. breve MCC1274) mitigated Alzheimer's disease (AD) pathologies in both 7-month-old AppNL-G-F mice and wild-type mice; thus, B. breve MCC1274 supplementation might potentially prevent the progression of AD. However, the possibility of using this probiotic as a treatment for AD remains unclear. Thus, we investigated the potential therapeutic effects of this probiotic on AD using 17-month-old AppNL-G-F mice with memory deficits and amyloid beta saturation in the brain. B. breve MCC1274 supplementation ameliorated memory impairment via an amyloid-cascade-independent pathway. It reduced hippocampal and cortical levels of phosphorylated extracellular signal-regulated kinase and c-Jun N-terminal kinase as well as heat shock protein 90, which might have suppressed tau hyperphosphorylation and chronic stress. Moreover, B. breve MCC1274 supplementation increased hippocampal synaptic protein levels and upregulated neuronal activity. Thus, B. breve MCC1274 supplementation may alleviate cognitive dysfunction by reducing chronic stress and tau hyperphosphorylation, thereby enhancing both synaptic density and neuronal activity in 17-month-old AppNL-G-F mice. Overall, this study suggests that B. breve MCC1274 has anti-AD effects and can be used as a potential treatment for AD.
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Affiliation(s)
- Mona Abdelhamid
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan; (M.A.); (C.Z.); (R.I.); (Y.C.)
| | - Cha-Gyun Jung
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan; (M.A.); (C.Z.); (R.I.); (Y.C.)
- Department of Neurophysiology and Brain Science, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan;
| | - Chunyu Zhou
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan; (M.A.); (C.Z.); (R.I.); (Y.C.)
| | - Rieko Inoue
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan; (M.A.); (C.Z.); (R.I.); (Y.C.)
| | - Yuxin Chen
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan; (M.A.); (C.Z.); (R.I.); (Y.C.)
| | - Yoshiki Sento
- Department of Anesthesiology and Intensive Care Medicine, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan;
| | - Hideki Hida
- Department of Neurophysiology and Brain Science, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan;
| | - Makoto Michikawa
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan; (M.A.); (C.Z.); (R.I.); (Y.C.)
- Department of Geriatric Medicine School of Life, Dentistry at Niigata, Nippon Dental University, 1-8 Hamaura-cho, Chuo-ku, Niigata 951-8580, Japan
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22
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Tchekalarova J, Ivanova P, Krushovlieva D, Kortenska L, Angelova VT. Protective Effect of the Novel Melatonin Analogue Containing Donepezil Fragment on Memory Impairment via MT/ERK/CREB Signaling in the Hippocampus in a Rat Model of Pinealectomy and Subsequent Aβ 1-42 Infusion. Int J Mol Sci 2024; 25:1867. [PMID: 38339146 PMCID: PMC10855364 DOI: 10.3390/ijms25031867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 01/31/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024] Open
Abstract
A reduction in melatonin function contributes to the acceleration of Alzheimer's disease (AD), and understanding the molecular processes of melatonin-related signaling is critical for intervention in AD progression. Recently, we synthesized a series of melatonin analogues with donepezil fragments and tested them in silico and in vitro. In this study, one of the most potent compounds, 3c, was evaluated in a rat model of pinealectomy (pin) followed by icvAβ1-42 infusion. Melatonin was used as the reference drug. Treatment with melatonin and 3c (10 mg/kg, i.p. for 14 days) had a beneficial effect on memory decline and the concomitant increase in hippocampal Aβ1-42 and pTAU in the pin+icvAβ1-42 rats. Melatonin supplementation facilitated non-amyloidogenic signaling via non-receptor (histone deacetylase sirtuin 1, SIRT1) and receptor-related signaling (MT/ERK/CREB). The hybrid 3c analogue up-regulated the MT1A and MT2B receptors, pERK and pCREB. Our results strongly support the hypothesis that melatonin-related analogues may become a promising drug candidate for Alzheimer's disease therapy.
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Affiliation(s)
- Jana Tchekalarova
- Institute of Neurobiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria; (P.I.); (D.K.); (L.K.)
| | - Petya Ivanova
- Institute of Neurobiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria; (P.I.); (D.K.); (L.K.)
| | - Desislava Krushovlieva
- Institute of Neurobiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria; (P.I.); (D.K.); (L.K.)
| | - Lidia Kortenska
- Institute of Neurobiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria; (P.I.); (D.K.); (L.K.)
| | - Violina T. Angelova
- Department of Chemistry, Faculty of Pharmacy, Medical University of Sofia, 1000 Sofia, Bulgaria;
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23
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An J, Kim K, Lim HJ, Kim HY, Shin J, Park I, Cho I, Kim HY, Kim S, McLean C, Choi KY, Kim Y, Lee KH, Kim JS. Early onset diagnosis in Alzheimer's disease patients via amyloid-β oligomers-sensing probe in cerebrospinal fluid. Nat Commun 2024; 15:1004. [PMID: 38307843 PMCID: PMC10837422 DOI: 10.1038/s41467-024-44818-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 01/05/2024] [Indexed: 02/04/2024] Open
Abstract
Amyloid-β (Aβ) oligomers are implicated in the onset of Alzheimer's disease (AD). Herein, quinoline-derived half-curcumin-dioxaborine (Q-OB) fluorescent probe was designed for detecting Aβ oligomers by finely tailoring the hydrophobicity of the biannulate donor motifs in donor-π-acceptor structure. Q-OB shows a great sensing potency in dynamically monitoring oligomerization of Aβ during amyloid fibrillogenesis in vitro. In addition, we applied this strategy to fluorometrically analyze Aβ self-assembly kinetics in the cerebrospinal fluids (CSF) of AD patients. The fluorescence intensity of Q-OB in AD patients' CSF revealed a marked change of log (I/I0) value of 0.34 ± 0.13 (cognitive normal), 0.15 ± 0.12 (mild cognitive impairment), and 0.14 ± 0.10 (AD dementia), guiding to distinguish a state of AD continuum for early diagnosis of AD. These studies demonstrate the potential of our approach can expand the currently available preclinical diagnostic platform for the early stages of AD, aiding in the disruption of pathological progression and the development of appropriate treatment strategies.
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Affiliation(s)
- Jusung An
- Department of Chemistry, Korea University, Seoul, 02841, Korea
| | - Kyeonghwan Kim
- Department of Pharmacy, College of Pharmacy, Yonsei University, Incheon, 21983, Korea
- Yonsei Institute of Pharmaceutical Sciences, College of Pharmacy, Yonsei University, Incheon, 21983, Korea
| | - Ho Jae Lim
- Department of Biomedical Science, Chosun University, Gwangju, 61452, Korea
| | - Hye Yun Kim
- Department of Pharmacy, College of Pharmacy, Yonsei University, Incheon, 21983, Korea
- Yonsei Institute of Pharmaceutical Sciences, College of Pharmacy, Yonsei University, Incheon, 21983, Korea
| | - Jinwoo Shin
- Department of Chemistry, Korea University, Seoul, 02841, Korea
| | - InWook Park
- Department of Pharmacy, College of Pharmacy, Yonsei University, Incheon, 21983, Korea
- Yonsei Institute of Pharmaceutical Sciences, College of Pharmacy, Yonsei University, Incheon, 21983, Korea
| | - Illhwan Cho
- Department of Pharmacy, College of Pharmacy, Yonsei University, Incheon, 21983, Korea
- Yonsei Institute of Pharmaceutical Sciences, College of Pharmacy, Yonsei University, Incheon, 21983, Korea
| | - Hyeong Yun Kim
- Department of Pharmacy, College of Pharmacy, Yonsei University, Incheon, 21983, Korea
| | - Sunghoon Kim
- Department of Pharmacy, College of Pharmacy, Yonsei University, Incheon, 21983, Korea
- Medicinal Bioconvergence Research Center, Institute for Artificial Intelligence and Biomedical Research, Gangnam Severance Hospital, Yonsei University, Incheon, 21983, Korea
- College of Pharmacy, College of Medicine, Interdisciplinary Biomedical Center, Gangnam Severance Hospital, Yonsei University, Incheon, 21983, Korea
| | - Catriona McLean
- Department of Pathology, The Alfred Hospital, Melbourne, 3004, Australia
| | - Kyu Yeong Choi
- Gwangju Alzheimer's & Related Dementia Cohort Research Center, Chosun University, Gwangju, 61452, Korea
| | - YoungSoo Kim
- Department of Pharmacy, College of Pharmacy, Yonsei University, Incheon, 21983, Korea.
- Yonsei Institute of Pharmaceutical Sciences, College of Pharmacy, Yonsei University, Incheon, 21983, Korea.
| | - Kun Ho Lee
- Department of Biomedical Science, Chosun University, Gwangju, 61452, Korea.
- Gwangju Alzheimer's & Related Dementia Cohort Research Center, Chosun University, Gwangju, 61452, Korea.
- Department of Neural Development and Disease, Korea Brain Research Institute, Daegu, 41062, Korea.
| | - Jong Seung Kim
- Department of Chemistry, Korea University, Seoul, 02841, Korea.
- TheranoChem Incorporation, Seongbuk-gu, Seoul, 02856, Korea.
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24
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Twitto-Greenberg R, Liraz-Zaltsman S, Michaelson DM, Liraz O, Lubitz I, Atrakchi-Baranes D, Shemesh C, Ashery U, Cooper I, Harari A, Harats D, Schnaider-Beeri M, Shaish A. 9-cis beta-carotene-enriched diet significantly improved cognition and decreased Alzheimer's disease neuropathology and neuroinflammation in Alzheimer's disease-like mouse models. Neurobiol Aging 2024; 133:16-27. [PMID: 38381472 DOI: 10.1016/j.neurobiolaging.2023.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 09/10/2023] [Accepted: 09/17/2023] [Indexed: 02/22/2024]
Abstract
A significant progressive decline in beta-carotene (βC) levels in the brain is associated with cognitive impairment and a higher prevalence of Alzheimer's disease (AD). In this study, we investigated whether the administration of 9-cis beta-carotene (9CBC)-rich powder of the alga Dunaliella bardawil, the best-known source of βC in nature, inhibits the development of AD-like neuropathology and cognitive deficits. We demonstrated that in 3 AD mouse models, Tg2576, 5xFAD, and apoE4, 9CBC treatment improved long- and short-term memory, decreased neuroinflammation, and reduced the prevalence of β-amyloid plaques and tau hyperphosphorylation. These findings suggest that 9CBC has the potential to be an effective preventive and symptomatic AD therapy.
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Affiliation(s)
- Rachel Twitto-Greenberg
- The Bert W. Strassburger Metabolic Center, Sheba Medical Center, Ramat-Gan, Israel; The Department of Neurobiology, George S. Wise Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv, Israel; The Joseph Sagol Neuroscience Center, Sheba Medical Center, Ramat-Gan, Israel
| | - Sigal Liraz-Zaltsman
- The Joseph Sagol Neuroscience Center, Sheba Medical Center, Ramat-Gan, Israel; Department of Pharmacology, Institute for Drug Research, Hebrew University, Jerusalem, Israel; Institutes for Health and Medical Professions, Department of Sports Therapy, Ono Academic College, Kyrat-Ono, Israel
| | - Daniel M Michaelson
- The Department of Neurobiology, George S. Wise Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv, Israel
| | - Ori Liraz
- The Department of Neurobiology, George S. Wise Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv, Israel
| | - Irit Lubitz
- The Joseph Sagol Neuroscience Center, Sheba Medical Center, Ramat-Gan, Israel
| | | | - Chen Shemesh
- The Joseph Sagol Neuroscience Center, Sheba Medical Center, Ramat-Gan, Israel
| | - Uri Ashery
- The Department of Neurobiology, George S. Wise Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv, Israel
| | - Itzik Cooper
- The Joseph Sagol Neuroscience Center, Sheba Medical Center, Ramat-Gan, Israel; Institutes for Health and Medical Professions, Department of Sports Therapy, Ono Academic College, Kyrat-Ono, Israel
| | - Ayelet Harari
- The Bert W. Strassburger Metabolic Center, Sheba Medical Center, Ramat-Gan, Israel
| | - Dror Harats
- The Bert W. Strassburger Metabolic Center, Sheba Medical Center, Ramat-Gan, Israel; The Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | | | - Aviv Shaish
- The Bert W. Strassburger Metabolic Center, Sheba Medical Center, Ramat-Gan, Israel; Department of Life Sciences, Achva Academic College, Be'er-Tuvia Regional Council, Israel.
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25
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Kuhn TB, Minamide LS, Tahtamouni LH, Alderfer SA, Walsh KP, Shaw AE, Yanouri O, Haigler HJ, Ruff MR, Bamburg JR. Chemokine Receptor Antagonists Prevent and Reverse Cofilin-Actin Rod Pathology and Protect Synapses in Cultured Rodent and Human iPSC-Derived Neurons. Biomedicines 2024; 12:93. [PMID: 38255199 PMCID: PMC10813319 DOI: 10.3390/biomedicines12010093] [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: 11/17/2023] [Revised: 12/20/2023] [Accepted: 12/26/2023] [Indexed: 01/24/2024] Open
Abstract
Synapse loss is the principal cause of cognitive decline in Alzheimer's disease (AD) and related disorders (ADRD). Synapse development depends on the intricate dynamics of the neuronal cytoskeleton. Cofilin, the major protein regulating actin dynamics, can be sequestered into cofilactin rods, intra-neurite bundles of cofilin-saturated actin filaments that can disrupt vesicular trafficking and cause synaptic loss. Rods are a brain pathology in human AD and mouse models of AD and ADRD. Eliminating rods is the focus of this paper. One pathway for rod formation is triggered in ~20% of rodent hippocampal neurons by disease-related factors (e.g., soluble oligomers of Amyloid-β (Aβ)) and requires cellular prion protein (PrPC), active NADPH oxidase (NOX), and cytokine/chemokine receptors (CCRs). FDA-approved antagonists of CXCR4 and CCR5 inhibit Aβ-induced rods in both rodent and human neurons with effective concentrations for 50% rod reduction (EC50) of 1-10 nM. Remarkably, two D-amino acid receptor-active peptides (RAP-103 and RAP-310) inhibit Aβ-induced rods with an EC50 of ~1 pM in mouse neurons and ~0.1 pM in human neurons. These peptides are analogs of D-Ala-Peptide T-Amide (DAPTA) and share a pentapeptide sequence (TTNYT) antagonistic to several CCR-dependent responses. RAP-103 does not inhibit neuritogenesis or outgrowth even at 1 µM, >106-fold above its EC50. N-terminal methylation, or D-Thr to D-Ser substitution, decreases the rod-inhibiting potency of RAP-103 by 103-fold, suggesting high target specificity. Neither RAP peptide inhibits neuronal rod formation induced by excitotoxic glutamate, but both inhibit rods induced in human neurons by several PrPC/NOX pathway activators (Aβ, HIV-gp120 protein, and IL-6). Significantly, RAP-103 completely protects against Aβ-induced loss of mature and developing synapses and, at 0.1 nM, reverses rods in both rodent and human neurons (T½ ~ 3 h) even in the continuous presence of Aβ. Thus, this orally available, brain-permeable peptide should be highly effective in reducing rod pathology in multifactorial neurological diseases with mixed proteinopathies acting through PrPC/NOX.
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Affiliation(s)
- Thomas B. Kuhn
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (T.B.K.); (L.S.M.); (L.H.T.); (K.P.W.); (A.E.S.)
| | - Laurie S. Minamide
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (T.B.K.); (L.S.M.); (L.H.T.); (K.P.W.); (A.E.S.)
| | - Lubna H. Tahtamouni
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (T.B.K.); (L.S.M.); (L.H.T.); (K.P.W.); (A.E.S.)
- Department of Biology and Biotechnology, Faculty of Science, The Hashemite University, Zarqa 13133, Jordan
| | - Sydney A. Alderfer
- Department of Chemical and Biological Engineering and School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523, USA;
| | - Keifer P. Walsh
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (T.B.K.); (L.S.M.); (L.H.T.); (K.P.W.); (A.E.S.)
| | - Alisa E. Shaw
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (T.B.K.); (L.S.M.); (L.H.T.); (K.P.W.); (A.E.S.)
| | - Omar Yanouri
- Molecular, Cellular and Integrative Neuroscience Program, Colorado State University, Fort Collins, CO 80523, USA;
| | - Henry J. Haigler
- Creative Bio-Peptides, Inc., 10319 Glen Road, Suite 100, Potomac, MD 20854, USA; (H.J.H.); (M.R.R.)
| | - Michael R. Ruff
- Creative Bio-Peptides, Inc., 10319 Glen Road, Suite 100, Potomac, MD 20854, USA; (H.J.H.); (M.R.R.)
| | - James R. Bamburg
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (T.B.K.); (L.S.M.); (L.H.T.); (K.P.W.); (A.E.S.)
- Molecular, Cellular and Integrative Neuroscience Program, Colorado State University, Fort Collins, CO 80523, USA;
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26
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Tooyama I, Kato T, Taguchi H, Kageyama Y, Irie K, Hirahara Y, Yanagisawa D. Visualization of Amyloid Oligomers in the Brain of Patients with Alzheimer's Disease. Acta Histochem Cytochem 2023; 56:87-94. [PMID: 38318103 PMCID: PMC10838628 DOI: 10.1267/ahc.23-00058] [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: 09/14/2023] [Accepted: 10/22/2023] [Indexed: 02/07/2024] Open
Abstract
In the pathogenesis of Alzheimer's disease (AD), highly neurotoxic amyloid-β (Aβ) oligomers appear early, they are thus considered to be deeply involved in the onset of Alzheimer's disease. However, Aβ oligomer visualization is challenging in human tissues due to their multiple forms (e.g., low- and high-molecular-weight oligomers, including protofibrils) as well as their tendency to rapidly change forms and aggregate. In this review, we present two visualization approaches for Aβ oligomers in tissues: an immunohistochemical (using the monoclonal antibody TxCo1 against toxic Aβ oligomer conformers) and imaging mass spectrometry using the small chemical Shiga-Y51 that specifically binds Aβ oligomers. TxCo1 immunohistochemistry revealed Aβ oligomer distributions in postmortem human brains with AD. Using Shiga-Y51, imaging mass spectrometry revealed Aβ oligomer distributions in the brain of a transgenic mouse model for AD. These two methods would potentially contribute to elucidating the pathological mechanisms underlying AD.
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Affiliation(s)
- Ikuo Tooyama
- Medical Innovation Research Center, Shiga University of Medical Science, Otsu, Japan
- Molecular Neuroscience Research Center, Shiga University of Medical Science, Otsu, Japan
| | - Tomoko Kato
- Medical Innovation Research Center, Shiga University of Medical Science, Otsu, Japan
| | - Hiroyasu Taguchi
- Molecular Neuroscience Research Center, Shiga University of Medical Science, Otsu, Japan
| | - Yusuke Kageyama
- Medical Innovation Research Center, Shiga University of Medical Science, Otsu, Japan
- Education Center for Medicine and Nursing, Shiga University of Medical Science, Otsu, Japan
| | - Kazuhiro Irie
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Yukie Hirahara
- Faculty of Nursing, Kansai Medical University, Hirakata, Japan
| | - Daijiro Yanagisawa
- Molecular Neuroscience Research Center, Shiga University of Medical Science, Otsu, Japan
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27
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Le NTK, Kang EJ, Park JH, Kang K. Catechol-Amyloid Interactions. Chembiochem 2023; 24:e202300628. [PMID: 37850717 DOI: 10.1002/cbic.202300628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/17/2023] [Accepted: 10/18/2023] [Indexed: 10/19/2023]
Abstract
This review introduces multifaceted mutual interactions between molecules containing a catechol moiety and aggregation-prone proteins. The complex relationships between these two molecular species have previously been elucidated primarily in a unidirectional manner, as demonstrated in cases involving the development of catechol-based inhibitors for amyloid aggregation and the elucidation of the role of functional amyloid fibers in melanin biosynthesis. This review aims to consolidate scattered clues pertaining to catechol-based amyloid inhibitors, functional amyloid scaffold of melanin biosynthesis, and chemically designed peptide fibers for providing chemical insights into the role of the local three-dimensional orientation of functional groups in manifesting such interactions. These orientations may play crucial, yet undiscovered, roles in various supramolecular structures.
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Affiliation(s)
- Nghia T K Le
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi, 17104, South Korea
| | - Eun Joo Kang
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi, 17104, South Korea
| | - Ji Hun Park
- Department of Science Education, Ewha Womans University, Seoul, 03760, South Korea
| | - Kyungtae Kang
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi, 17104, South Korea
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28
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Rivera J, Sharma B, Torres MM, Kumar S. Factors affecting the GABAergic synapse function in Alzheimer's disease: Focus on microRNAs. Ageing Res Rev 2023; 92:102123. [PMID: 37967653 DOI: 10.1016/j.arr.2023.102123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/07/2023] [Accepted: 11/09/2023] [Indexed: 11/17/2023]
Abstract
Alzheimer's disease (AD) is a progressive neurological disease characterized by the loss of cognitive function, confusion, and memory deficit. Accumulation of abnormal proteins, amyloid beta (Aß), and phosphorylated Tau (p-tau) forms plaques and tangles that deteriorate synapse function, resulting in neurodegeneration and cognitive decline in AD. The human brain is composed of different types of neurons and/or synapses that are functionally defective in AD. The GABAergic synapse, the most abundant inhibitory neuron in the human brain was found to be dysfunctional in AD and contributes to disrupting neurological function. This study explored the types of GABA receptors associated with neurological dysfunction and various biological and environmental factors that cause GABAergic neuron dysfunction in AD, such as Aβ, p-tau, aging, sex, astrocytes, microglia, APOE, mental disorder, diet, physical activity, and sleep. Furthermore, we explored the role of microRNAs (miRNAs) in the regulation of GABAergic synapse function in neurological disorders and AD states. We also discuss the molecular mechanisms underlying GABAergic synapse dysfunction with a focus on miR-27b, miR-30a, miR-190a/b, miR-33, miR-51, miR-129-5p, miR-376-3p, miR-376c, miR-30b and miR-502-3p. The purpose of our article is to highlight the recent research on miRNAs affecting the regulation of GABAergic synapse function and factors that contribute to the progression of AD.
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Affiliation(s)
- Jazmin Rivera
- Center of Emphasis in Neuroscience, Department of Molecular and Translational Medicine, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX, USA
| | - Bhupender Sharma
- Center of Emphasis in Neuroscience, Department of Molecular and Translational Medicine, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX, USA
| | - Melissa M Torres
- Center of Emphasis in Neuroscience, Department of Molecular and Translational Medicine, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX, USA
| | - Subodh Kumar
- Center of Emphasis in Neuroscience, Department of Molecular and Translational Medicine, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX, USA; L. Frederick Francis Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center, El Paso, TX, USA.
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29
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Muhammedkutty FNK, Prasad R, Gao Y, Sudarshan TR, Robang AS, Watzlawik JO, Rosenberry TL, Paravastu AK, Zhou HX. A common pathway for detergent-assisted oligomerization of Aβ42. Commun Biol 2023; 6:1184. [PMID: 37989804 PMCID: PMC10663524 DOI: 10.1038/s42003-023-05556-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 11/08/2023] [Indexed: 11/23/2023] Open
Abstract
Amyloid beta (Aβ) aggregation is a slow process without seeding or assisted nucleation. Sodium dodecyl sulfate (SDS) micelles stabilize Aβ42 small oligomers (in the dimer to tetramer range); subsequent SDS removal leads to a 150-kD Aβ42 oligomer. Dodecylphosphorylcholine (DPC) micelles also stabilize an Aβ42 tetramer. Here we investigate the detergent-assisted oligomerization pathway by solid-state NMR spectroscopy and molecular dynamics simulations. SDS- and DPC-induced oligomers have the same structure, implying a common oligomerization pathway. An antiparallel β-sheet formed by the C-terminal region, the only stable structure in SDS and DPC micelles, is directly incorporated into the 150-kD oligomer. Three Gly residues (at positions 33, 37, and 38) create holes that are filled by the SDS and DPC hydrocarbon tails, thereby turning a potentially destabilizing feature into a stabilizing factor. These observations have implications for endogenous Aβ aggregation at cellular interfaces.
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Affiliation(s)
| | - Ramesh Prasad
- Department of Chemistry, University of Illinois Chicago, Chicago, IL, 60607, USA
| | - Yuan Gao
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, GA, 30332, USA
| | - Tarunya Rao Sudarshan
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, GA, 30332, USA
| | - Alicia S Robang
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, GA, 30332, USA
| | - Jens O Watzlawik
- Departments of Neuroscience and Pharmacology, Mayo Clinic, Jacksonville, FL, 32224, USA
| | - Terrone L Rosenberry
- Departments of Neuroscience and Pharmacology, Mayo Clinic, Jacksonville, FL, 32224, USA
| | - Anant K Paravastu
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, GA, 30332, USA.
- Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA, 30332, USA.
| | - Huan-Xiang Zhou
- Department of Chemistry, University of Illinois Chicago, Chicago, IL, 60607, USA.
- Department of Physics, University of Illinois Chicago, Chicago, IL, 60607, USA.
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30
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Tahtamouni LH, Alderfer SA, Kuhn TB, Minamide LS, Chanda S, Ruff MR, Bamburg JR. Characterization of a Human Neuronal Culture System for the Study of Cofilin-Actin Rod Pathology. Biomedicines 2023; 11:2942. [PMID: 38001943 PMCID: PMC10669520 DOI: 10.3390/biomedicines11112942] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 10/17/2023] [Accepted: 10/26/2023] [Indexed: 11/26/2023] Open
Abstract
Cofilactin rod pathology, which can initiate synapse loss, has been extensively studied in rodent neurons, hippocampal slices, and in vivo mouse models of human neurodegenerative diseases such as Alzheimer's disease (AD). In these systems, rod formation induced by disease-associated factors, such as soluble oligomers of Amyloid-β (Aβ) in AD, utilizes a pathway requiring cellular prion protein (PrPC), NADPH oxidase (NOX), and cytokine/chemokine receptors (CCR5 and/or CXCR4). However, rod pathways have not been systematically assessed in a human neuronal model. Here, we characterize glutamatergic neurons differentiated from human-induced pluripotent stem cells (iPSCs) for the formation of rods in response to activators of the PrPC-dependent pathway. Optimization of substratum, cell density, and use of glial-conditioned medium yielded a robust system for studying the development of Aβ-induced rods in the absence of glia, suggesting a cell-autonomous pathway. Rod induction in younger neurons requires ectopic expression of PrPC, but this dependency disappears by Day 55. The quantification of proteins within the rod-inducing pathway suggests that increased PrPC and CXCR4 expression may be factors in the doubling of the rod response to Aβ between Days 35 and 55. FDA-approved antagonists to CXCR4 and CCR5 inhibit the rod response. Rods were predominantly observed in dendrites, although severe cytoskeletal disruptions prevented the assignment of over 40% of the rods to either an axon or dendrite. In the absence of glia, a condition in which rods are more readily observed, neurons mature and fire action potentials but do not form functional synapses. However, PSD95-containing dendritic spines associate with axonal regions of pre-synaptic vesicles containing the glutamate transporter, VGLUT1. Thus, our results identified stem cell-derived neurons as a robust model for studying cofilactin rod formation in a human cellular environment and for developing effective therapeutic strategies for the treatment of dementias arising from multiple proteinopathies with different rod initiators.
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Affiliation(s)
- Lubna H. Tahtamouni
- Department of Biology and Biotechnology, Faculty of Science, The Hashemite University, Zarqa 13133, Jordan;
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (T.B.K.); (L.S.M.); (S.C.)
| | - Sydney A. Alderfer
- Department of Chemical and Biological Engineering and School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523, USA;
| | - Thomas B. Kuhn
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (T.B.K.); (L.S.M.); (S.C.)
| | - Laurie S. Minamide
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (T.B.K.); (L.S.M.); (S.C.)
| | - Soham Chanda
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (T.B.K.); (L.S.M.); (S.C.)
| | - Michael R. Ruff
- Creative Bio-Peptides, Inc., 10319 Glen Road, Suite 100, Potomac, MD 20854, USA;
| | - James R. Bamburg
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (T.B.K.); (L.S.M.); (S.C.)
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31
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Salazar J, Samhan-Arias AK, Gutierrez-Merino C. Hexa-Histidine, a Peptide with Versatile Applications in the Study of Amyloid-β(1-42) Molecular Mechanisms of Action. Molecules 2023; 28:7138. [PMID: 37894616 PMCID: PMC10609148 DOI: 10.3390/molecules28207138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/10/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023] Open
Abstract
Amyloid β (Aβ) oligomers are the most neurotoxic forms of Aβ, and Aβ(1-42) is the prevalent Aβ peptide found in the amyloid plaques of Alzheimer's disease patients. Aβ(25-35) is the shortest peptide that retains the toxicity of Aβ(1-42). Aβ oligomers bind to calmodulin (CaM) and calbindin-D28k with dissociation constants in the nanomolar Aβ(1-42) concentration range. Aβ and histidine-rich proteins have a high affinity for transition metal ions Cu2+, Fe3+ and Zn2+. In this work, we show that the fluorescence of Aβ(1-42) HiLyteTM-Fluor555 can be used to monitor hexa-histidine peptide (His6) interaction with Aβ(1-42). The formation of His6/Aβ(1-42) complexes is also supported by docking results yielded by the MDockPeP Server. Also, we found that micromolar concentrations of His6 block the increase in the fluorescence of Aβ(1-42) HiLyteTM-Fluor555 produced by its interaction with the proteins CaM and calbindin-D28k. In addition, we found that the His6-tag provides a high-affinity site for the binding of Aβ(1-42) and Aβ(25-35) peptides to the human recombinant cytochrome b5 reductase, and sensitizes this enzyme to inhibition by these peptides. In conclusion, our results suggest that a His6-tag could provide a valuable new tool to experimentally direct the action of neurotoxic Aβ peptides toward selected cellular targets.
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Affiliation(s)
- Jairo Salazar
- Departamento de Química, Universidad Nacional Autónoma de Nicaragua-León, León 21000, Nicaragua
| | - Alejandro K. Samhan-Arias
- Departamento de Bioquímica, Universidad Autónoma de Madrid (UAM), C\Arzobispo Morcillo 4, 28029 Madrid, Spain;
- Instituto de Investigaciones Biomédicas ‘Alberto Sols’ (CSIC-UAM), C\Arturo Duperier 4, 28029 Madrid, Spain
| | - Carlos Gutierrez-Merino
- Instituto de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, 06006 Badajoz, Spain
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32
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Kepp KP, Robakis NK, Høilund-Carlsen PF, Sensi SL, Vissel B. The amyloid cascade hypothesis: an updated critical review. Brain 2023; 146:3969-3990. [PMID: 37183523 DOI: 10.1093/brain/awad159] [Citation(s) in RCA: 38] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 04/20/2023] [Accepted: 04/23/2023] [Indexed: 05/16/2023] Open
Abstract
Results from recent clinical trials of antibodies that target amyloid-β (Aβ) for Alzheimer's disease have created excitement and have been heralded as corroboration of the amyloid cascade hypothesis. However, while Aβ may contribute to disease, genetic, clinical, imaging and biochemical data suggest a more complex aetiology. Here we review the history and weaknesses of the amyloid cascade hypothesis in view of the new evidence obtained from clinical trials of anti-amyloid antibodies. These trials indicate that the treatments have either no or uncertain clinical effect on cognition. Despite the importance of amyloid in the definition of Alzheimer's disease, we argue that the data point to Aβ playing a minor aetiological role. We also discuss data suggesting that the concerted activity of many pathogenic factors contribute to Alzheimer's disease and propose that evolving multi-factor disease models will better underpin the search for more effective strategies to treat the disease.
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Affiliation(s)
- Kasper P Kepp
- Section of Biophysical and Biomedicinal chemistry, DTU Chemistry, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Nikolaos K Robakis
- Icahn School of Medicine at Mount Sinai Medical Center, New York, NY 10029, USA
| | - Poul F Høilund-Carlsen
- Department of Nuclear Medicine, Odense University Hospital, 5000 Odense C, Denmark
- Department of Clinical Research, University of Southern Denmark, 5000 Odense C, Denmark
| | - Stefano L Sensi
- Center for Advanced Studies and Technology-CAST, and Institute for Advanced Biotechnology (ITAB), University G. d'Annunzio of Chieti-Pescara, Chieti, 66013, Italy
- Department of Neuroscience, Imaging, and Clinical Sciences, University G. d'Annunzio of Chieti-Pescara, Chieti, 66013, Italy
| | - Bryce Vissel
- St Vincent's Hospital Centre for Applied Medical Research, St Vincent's Hospital, Sydney, 2010, Australia
- School of Clinical Medicine, UNSW Medicine and Health, St Vincent's Healthcare Clinical Campus, Faculty of Medicine and Health, Sydney, NSW 2052, Australia
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33
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Fakharzadeh A, Qu J, Pan F, Sagui C, Roland C. Structure and Dynamics of DNA and RNA Double Helices Formed by d(CTG), d(GTC), r(CUG), and r(GUC) Trinucleotide Repeats and Associated DNA-RNA Hybrids. J Phys Chem B 2023; 127:7907-7924. [PMID: 37681731 PMCID: PMC10519205 DOI: 10.1021/acs.jpcb.3c03538] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 07/11/2023] [Indexed: 09/09/2023]
Abstract
Myotonic dystrophy type 1 is the most frequent form of muscular dystrophy in adults caused by an abnormal expansion of the CTG trinucleotide. Both the expanded DNA and the expanded CUG RNA transcript can fold into hairpins. Co-transcriptional formation of stable RNA·DNA hybrids can also enhance the instability of repeat tracts. We performed molecular dynamics simulations of homoduplexes associated with the disease, d(CTG)n and r(CUG)n, and their corresponding r(CAG)n:d(CTG)n and r(CUG)n:d(CAG)n hybrids that can form under bidirectional transcription and of non-pathological d(GTC)n and d(GUC)n homoduplexes. We characterized their conformations, stability, and dynamics and found that the U·U and T·T mismatches are dynamic, favoring anti-anti conformations inside the helical core, followed by anti-syn and syn-syn conformations. For DNA, the secondary minima in the non-expanding d(GTC)n helices are deeper, wider, and longer-lived than those in d(CTG)n, which constitutes another biophysical factor further differentiating the expanding and non-expanding sequences. The hybrid helices are closer to A-RNA, with the A-T and A-U pairs forming two stable Watson-Crick hydrogen bonds. The neutralizing ion distribution around the non-canonical pairs is also described.
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Affiliation(s)
- Ashkan Fakharzadeh
- Department
of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202, USA
| | - Jing Qu
- Department
of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202, USA
| | - Feng Pan
- Department
of Statistics, Florida State University, Tallahassee, Florida 32306, USA
| | - Celeste Sagui
- Department
of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202, USA
| | - Christopher Roland
- Department
of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202, USA
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34
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Gutierrez-Merino C. Brain Hydrophobic Peptides Antagonists of Neurotoxic Amyloid β Peptide Monomers/Oligomers-Protein Interactions. Int J Mol Sci 2023; 24:13846. [PMID: 37762148 PMCID: PMC10531495 DOI: 10.3390/ijms241813846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 09/02/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023] Open
Abstract
Amyloid β (Aβ) oligomers have been linked to Alzheimer's disease (AD) pathogenesis and are the main neurotoxic forms of Aβ. This review focuses on the following: (i) the Aβ(1-42):calmodulin interface as a model for the design of antagonist Aβ peptides and its limitations; (ii) proteolytic degradation as the major source of highly hydrophobic peptides in brain cells; and (iii) brain peptides that have been experimentally demonstrated to bind to Aβ monomers or oligomers, Aβ fibrils, or Aβ plaques. It is highlighted that the hydrophobic amino acid residues of the COOH-terminal segment of Aβ(1-42) play a key role in its interaction with intracellular protein partners linked to its neurotoxicity. The major source of highly hydrophobic endogenous peptides of 8-10 amino acids in neurons is the proteasome activity. Many canonical antigen peptides bound to the major histocompatibility complex class 1 are of this type. These highly hydrophobic peptides bind to Aβ and are likely to be efficient antagonists of the binding of Aβ monomers/oligomers concentrations in the nanomolar range with intracellular proteins. Also, their complexation with Aβ will protect them against endopeptidases, suggesting a putative chaperon-like physiological function for Aβ that has been overlooked until now. Remarkably, the hydrophobic amino acid residues of Aβ responsible for the binding of several neuropeptides partially overlap with those playing a key role in its interaction with intracellular protein partners that mediates its neurotoxicity. Therefore, these latter neuropeptides are also potential candidates to antagonize Aβ peptides binding to target proteins. In conclusion, the analysis performed in this review points out that hydrophobic endogenous brain neuropeptides could be valuable biomarkers to evaluate the risk of the onset of sporadic AD, as well as for the prognosis of AD.
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Affiliation(s)
- Carlos Gutierrez-Merino
- Instituto de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, 06006 Badajoz, Spain
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35
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Drajkowska A, Molski A. Aggregation and partitioning of amyloid peptide fragments in the presence of a lipid bilayer: A coarse grained molecular dynamics study. Biophys Chem 2023; 300:107051. [PMID: 37329644 DOI: 10.1016/j.bpc.2023.107051] [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: 03/12/2023] [Revised: 05/30/2023] [Accepted: 05/31/2023] [Indexed: 06/19/2023]
Abstract
Amyloidogenicity and toxicity of amyloid peptides have been linked to the peptide aggregation and interactions with lipid bilayers. In this work we used the coarse grained MARTINI model to study the aggregation and partitioning of amyloid peptide fragments Aβ(1-28) and Aβ(25-35) in the presence of a dipalmitoylphosphatidylcholine bilayer. We explored the peptide aggregation starting from three initial spatial arrangements where free monomers were placed in solution outside the membrane, at the membrane-solution interface, or in the membrane. We found that Aβ(1-28) and Aβ(25-35) interact with the bilayer quite differently. The Aβ(1-28) fragments show strong peptide-peptide and peptide-lipid interactions leading to irreversible aggregation where the aggregates stay confined to their initial spatial location. The Aβ(25-35) fragments show weaker peptide-peptide and peptide-lipid interaction leading to reversible aggregation and accumulation at the membrane-solution interface irrespective of their initial spatial arrangement. Those findings can be explained in terms of the shape of the potential of mean force for the single-peptide translocation across the membrane.
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Affiliation(s)
- Aleksandra Drajkowska
- Adam Mickiewicz University in Poznań, Faculty of Chemistry, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.
| | - Andrzej Molski
- Adam Mickiewicz University in Poznań, Faculty of Chemistry, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.
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36
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Chatterjee T, Das G, Chatterjee BK, Ghosh S, Chakrabarti P. The Role of Protein- L-isoaspartyl Methyltransferase (PIMT) in the Suppression of Toxicity of the Oligomeric Form of Aβ42, in Addition to the Inhibition of Its Fibrillization. ACS Chem Neurosci 2023; 14:2888-2901. [PMID: 37535852 DOI: 10.1021/acschemneuro.3c00281] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023] Open
Abstract
The oligomeric form of amyloid-β peptide (Aβ42) plays a crucial role in the pathogenesis of Alzheimer's disease (AD) and is responsible for cognitive deficits. The soluble oligomers are believed to be more toxic compared to the fibril form. Protein-L-isoaspartyl methyltransferase (PIMT) is a repair enzyme that converts aberrant isoAsp residues, formed spontaneously on isomerization of normal Asp and Asn residues, back to typical Asp. It was shown to inhibit the fibrillization of Aβ42 (containing three Asp residues), and here, we investigate its effect on the size, conformation, and toxicity of Aβ42 oligomers (AβO). Far-UV CD indicated a shift in the conformational feature of AβOs from the random coil to β-sheet in the presence of PIMT. Binding of bis-ANS to different AβOs (obtained using different concentrations of Aβ42 monomer) indicated the correlation of size of oligomers to hydrophobicity: the smallest AβO having the highest hydrophobicity is the most toxic. Dynamic light scattering showed an increase in size of AβO with the addition of PIMT, a contrasting role to that on Aβ fibril. Assays using PC12-derived neurons showed the neuroprotective role of PIMT against AβO-induced toxicity. Furthermore, we have elaborated on the molecular mechanism of the antifibrillar action of PIMT and how this function is correlated with its enzymatic activity. PIMT has a more pronounced effect on AβO as compared to a small heat shock protein, pointing to its importance for the amelioration of the adverse effect of both Aβ42 oligomers and fibrils.
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Affiliation(s)
- Tanaya Chatterjee
- Department of Biochemistry, Bose Institute, P1/12 CIT Scheme VIIM, Kolkata 700054, India
| | - Gaurav Das
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Barun K Chatterjee
- Department of Physics, Bose Institute, 93/1 A.P.C. Road, Kolkata 700054, India
| | - Surajit Ghosh
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Pinak Chakrabarti
- Department of Biochemistry, Bose Institute, P1/12 CIT Scheme VIIM, Kolkata 700054, India
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37
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Poorgholam P, Yaghmaei P, Noureddini M, Hajebrahimi Z. Artemisin and human endometrial-derived stem cells improve cognitive function and synaptic plasticity in a rat model of Alzheimer disease and diabetes. Metab Brain Dis 2023; 38:1925-1936. [PMID: 37043150 DOI: 10.1007/s11011-023-01200-y] [Citation(s) in RCA: 3] [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: 07/12/2022] [Accepted: 03/10/2023] [Indexed: 04/13/2023]
Abstract
Alzheimer disease (AD) is a common form of dementia associated with loss of memory and disruption of synaptic plasticity. There is a strong correlation between the pathophysiological features of AD and diabetes, including induction of oxidative stress, inflammation, and abnormality in blood vessels. Considering the brain's limited capacity to repair damage and the potential of stem cell-derived neural cells in the repair of neurodegenerative disease, we investigated the effects of artemisinin and TSP‑1‑human endometrial-derived-derived stem cells (TSP‑1‑hEDSCs) on the cognitive function and synaptic plasticity in AD-diabetes rats. The authors previously showed that artemisinin and TSP‑1‑hEDSCs suppressed oxidative stress and inflammation in AD-diabetes rats. Thrombospondins-1 (TSPs-1) is a glycoprotein that inhibits angiogenesis. AD and diabetes were induced using streptozotocin. Synaptic plasticity and learning and memory function were studied using the Morris water maze and electrophysiological test, respectively. Streptozotocin increased traveled swimming distance and escape latency in the morris water maze test, decreased the percent time spent in the target quadrant, inhibited the long-term potentiation (LTP), and increased the blood glucose levels. Simultaneous or separate administration of artemisinin and TSP‑1‑hEDSCs decreased the blood levels of glucose and improved cognitive tasks and synaptic plasticity by considerably reducing traveled swimming distance and escape latency, increasing the percent time spent in the target quadrant, and retrieval of the LTP; therefore, they could be utilized as an adjunct treatment for AD treatment. These results may be due to a decrease in oxidative stress and inflammation.
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Affiliation(s)
- Parvin Poorgholam
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Parichehreh Yaghmaei
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | - Mehdi Noureddini
- Physiology Research Center, Kashan University of Medical Sciences, Kashan, Iran
| | - Zahra Hajebrahimi
- A&S Research Institute, Ministry of Science Research and Technology, Tehran, Iran
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38
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Kim SH, Cho YS, Kim Y, Park J, Yoo SM, Gwak J, Kim Y, Gwon Y, Kam TI, Jung YK. Endolysosomal impairment by binding of amyloid beta or MAPT/Tau to V-ATPase and rescue via the HYAL-CD44 axis in Alzheimer disease. Autophagy 2023; 19:2318-2337. [PMID: 36843263 PMCID: PMC10351450 DOI: 10.1080/15548627.2023.2181614] [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: 04/14/2022] [Revised: 02/10/2023] [Accepted: 02/13/2023] [Indexed: 02/28/2023] Open
Abstract
Impaired activities and abnormally enlarged structures of endolysosomes are frequently observed in Alzheimer disease (AD) brains. However, little is known about whether and how endolysosomal dysregulation is triggered and associated with AD. Here, we show that vacuolar ATPase (V-ATPase) is a hub that mediates proteopathy of oligomeric amyloid beta (Aβ) and hyperphosphorylated MAPT/Tau (p-MAPT/Tau). Endolysosomal integrity was largely destroyed in Aβ-overloaded or p-MAPT/Tau-positive neurons in culture and AD brains, which was a necessary step for triggering neurotoxicity, and treatments with acidic nanoparticles or endocytosis inhibitors rescued the endolysosomal impairment and neurotoxicity. Interestingly, we found that the lumenal ATP6V0C and cytosolic ATP6V1B2 subunits of the V-ATPase complex bound to the internalized Aβ and cytosolic PHF-1-reactive MAPT/Tau, respectively. Their interactions disrupted V-ATPase activity and accompanying endolysosomal activity in vitro and induced neurodegeneration. Using a genome-wide functional screen, we isolated a suppressor, HYAL (hyaluronidase), which reversed the endolysosomal dysfunction and proteopathy and alleviated the memory impairment in 3xTg-AD mice. Further, we found that its metabolite hyaluronic acid (HA) and HA receptor CD44 attenuated neurotoxicity in affected neurons via V-ATPase. We propose that endolysosomal V-ATPase is a bona fide proteotoxic receptor that binds to pathogenic proteins and deteriorates endolysosomal function in AD, leading to neurodegeneration in proteopathy.Abbreviations: AAV, adeno-associated virus; Aβ, amyloid beta; AD, Alzheimer disease; APP, amyloid beta precursor protein; ATP6V0C, ATPase H+ transporting V0 subunit c; ATP6V1A, ATPase H+ transporting V1 subunit A; ATP6V1B2, ATPase H+ transporting V1 subunit B2; CD44.Fc, CD44-mouse immunoglobulin Fc fusion construct; Co-IP, co-immunoprecipitation; CTSD, cathepsin D; HA, hyaluronic acid; HMWHA, high-molecular-weight hyaluronic acid; HYAL, hyaluronidase; i.c.v, intracerebroventricular; LMWHA, low-molecular-weight hyaluronic acid; NPs, nanoparticles; p-MAPT/Tau, hyperphosphorylated microtubule associated protein tau; PI3K, phosphoinositide 3-kinase; V-ATPase, vacuolar-type H+-translocating ATPase; WT, wild-type.
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Affiliation(s)
- Seo-Hyun Kim
- School of Biological Sciences, Seoul National University, Seoul, Korea
| | - Young-Sin Cho
- School of Biological Sciences, Seoul National University, Seoul, Korea
| | - Youbin Kim
- Interdisciplinary Program in Neuroscience, Seoul National University, Seoul, Korea
| | - Jisu Park
- School of Biological Sciences, Seoul National University, Seoul, Korea
| | - Seung-Min Yoo
- School of Biological Sciences, Seoul National University, Seoul, Korea
| | - Jimin Gwak
- School of Biological Sciences, Seoul National University, Seoul, Korea
| | - Youngwon Kim
- School of Biological Sciences, Seoul National University, Seoul, Korea
| | - Youngdae Gwon
- School of Medicine, Sungkyunkwan University, Suwon, Korea
| | - Tae-in Kam
- Department of Neurology and Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Yong-Keun Jung
- School of Biological Sciences, Seoul National University, Seoul, Korea
- Interdisciplinary Program in Neuroscience, Seoul National University, Seoul, Korea
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39
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Sawmiller D, Koyama N, Fujiwara M, Segawa T, Maeda M, Mori T. Targeting apolipoprotein E and N-terminal amyloid β-protein precursor interaction improves cognition and reduces amyloid pathology in Alzheimer's mice. J Biol Chem 2023; 299:104846. [PMID: 37211092 PMCID: PMC10331488 DOI: 10.1016/j.jbc.2023.104846] [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: 08/09/2022] [Revised: 05/09/2023] [Accepted: 05/13/2023] [Indexed: 05/23/2023] Open
Abstract
Apolipoprotein E (apoE) interaction with amyloid β-protein precursor (APP) has garnered attention as the therapeutic target for Alzheimer's disease (AD). Having discovered the apoE antagonist (6KApoEp) that blocks apoE binding to N-terminal APP, we tested the therapeutic potential of 6KApoEp on AD-relevant phenotypes in amyloid β-protein precursor/presenilin 1 (APP/PS1) mice that express each human apoE isoform of apoE2, apoE3, or apoE4 (designated APP/PS1/E2, APP/PS1/E3, or APP/PS1/E4 mice). At 12 months of age, we intraperitoneally administered 6KApoEp (250 μg/kg) or vehicle once daily for 3 months. At 15 months of age, blockage of apoE and N-terminal APP interaction by 6KApoEp treatment improved cognitive impairment in most tests of learning and memory, including novel object recognition and maze tasks in APP/PS1/E2, APP/PS1/E3, and APP/PS1/E4 mice versus each vehicle-treated mouse line and did not alter behavior in nontransgenic littermates. Moreover, 6KApoEp therapy ameliorated brain parenchymal and cerebral vascular β-amyloid deposits and decreased abundance of amyloid β-protein (Aβ) in APP/PS1/E2, APP/PS1/E3, and APP/PS1/E4 mice versus each vehicle-treated mouse group. Notably, the highest effect in Aβ-lowering by 6KApoEp treatment was observed in APP/PS1/E4 mice versus APP/PS1/E2 or APP/PS1/E3 mice. These effects occured through shifting toward lessened amyloidogenic APP processing due to decreasing APP abundance at the plasma membrane, reducing APP transcription, and inhibiting p44/42 mitogen-activated protein kinase phosphorylation. Our findings provide the preclinical evidence that 6KApoEp therapy aimed at targeting apoE and N-terminal APP interaction is a promising strategy and may be suitable for patients with AD carrying the apoE4 isoform.
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Affiliation(s)
- Darrell Sawmiller
- Department of Neurosurgery and Brain Repair, Center of Excellence for Aging and Brain Repair, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA.
| | - Naoki Koyama
- Department of Biomedical Sciences, Saitama Medical Center and University, Kawagoe, Saitama, Japan
| | - Masakazu Fujiwara
- Department of Biomedical Sciences, Saitama Medical Center and University, Kawagoe, Saitama, Japan
| | - Tatsuya Segawa
- Immuno-Biological Laboratories Co, Ltd, Fujioka, Gunma, Japan
| | - Masahiro Maeda
- Immuno-Biological Laboratories Co, Ltd, Fujioka, Gunma, Japan
| | - Takashi Mori
- Department of Biomedical Sciences, Saitama Medical Center and University, Kawagoe, Saitama, Japan; Department of Pathology, Saitama Medical Center and University, Kawagoe, Saitama, Japan.
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40
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Karsuntseva EK, Voronova AD, Chadin AV, Shishkina VV, Fursa GA, Andretsova SS, Reshetov IV, Stepanova OV, Chekhonin VP. Application of Behavioral Tests for Evaluation of an Experimental Model of Alzheimer's Disease in Female Rats. Bull Exp Biol Med 2023:10.1007/s10517-023-05823-0. [PMID: 37336813 DOI: 10.1007/s10517-023-05823-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Indexed: 06/21/2023]
Abstract
Alzheimer's disease was modeled in female Wistar rats aged 4 months by stereotaxic bilateral injection of a synthetic peptide β-amyloid (Aβ1-42) into the hippocampus. Behavioral tests (open field, Y-maze, passive avoidance, and Morris water maze) revealed significant impairment of memory and spatial navigation 8 weeks after β-amyloid administration. At this term, the cognitive impairments typical of Alzheimer's disease are reproduced. The experimental model of Alzheimer's disease proposed by us can be used in preclinical studies of drugs for the treatment of this pathology.
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Affiliation(s)
- E K Karsuntseva
- V. P. Serbsky National Medical Research Center of Psychiatry and Narcology, Ministry of Health of the Russian Federation, Moscow, Russia.
| | - A D Voronova
- V. P. Serbsky National Medical Research Center of Psychiatry and Narcology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - A V Chadin
- V. P. Serbsky National Medical Research Center of Psychiatry and Narcology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - V V Shishkina
- V. P. Serbsky National Medical Research Center of Psychiatry and Narcology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - G A Fursa
- V. P. Serbsky National Medical Research Center of Psychiatry and Narcology, Ministry of Health of the Russian Federation, Moscow, Russia
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - S S Andretsova
- V. P. Serbsky National Medical Research Center of Psychiatry and Narcology, Ministry of Health of the Russian Federation, Moscow, Russia
- M. V. Lomonosov Moscow State University, Moscow, Russia
| | - I V Reshetov
- University Clinical Hospital No. 1, I. M. Sechenov First Moscow State Medical University, Ministry of Health of the Russian Federation (Sechenov University), Moscow, Russia
| | - O V Stepanova
- V. P. Serbsky National Medical Research Center of Psychiatry and Narcology, Ministry of Health of the Russian Federation, Moscow, Russia
- E. I. Chazov National Medical Research Center of Cardiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - V P Chekhonin
- V. P. Serbsky National Medical Research Center of Psychiatry and Narcology, Ministry of Health of the Russian Federation, Moscow, Russia
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
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LaBarbera KM, Sheline YI, Izzo NJ, Yuede CM, Waybright L, Yurko R, Edwards HM, Gardiner WD, Blennow K, Zetterberg H, Börjesson-Hanson A, Morgan R, Davis CS, Guttendorf RJ, Schneider LS, DeKosky S, LeVine H, Grundman M, Caggiano AO, Cirrito JR, Catalano SM, Hamby ME. A phase 1b randomized clinical trial of CT1812 to measure Aβ oligomer displacement in Alzheimer's disease using an indwelling CSF catheter. Transl Neurodegener 2023; 12:24. [PMID: 37173791 PMCID: PMC10176668 DOI: 10.1186/s40035-023-00358-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 04/22/2023] [Indexed: 05/15/2023] Open
Affiliation(s)
| | | | | | | | | | | | | | | | | | - Henrik Zetterberg
- University of Gothenburg, Mölndal, Sweden
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden
- Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
- Department of Neurodegenerative Disease, UCL Institute of Neurology, Queen Square, London, UK
- UK Dementia Research Institute at UCL, London, UK
- Hong Kong Center for Neurodegenerative Diseases, Clear Water Bay, Hong Kong, China
- Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, USA
| | | | | | | | | | | | - Steven DeKosky
- McKnight Brain Institute, University of Florida, Gainesville, FL, USA
| | - Harry LeVine
- Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, USA
| | - Michael Grundman
- Global R&D Partners, LLC, San Diego, CA, USA
- Department of Neurosciences, University of California, San Diego, USA
| | | | | | | | - Mary E Hamby
- Cognition Therapeutics Inc., Pittsburgh, PA, USA.
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42
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Li X, Yang Z, Chen Y, Zhang S, Wei G, Zhang L. Dissecting the Molecular Mechanisms of the Co-Aggregation of Aβ40 and Aβ42 Peptides: A REMD Simulation Study. J Phys Chem B 2023; 127:4050-4060. [PMID: 37126408 DOI: 10.1021/acs.jpcb.3c01078] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The aggregation of amyloid-β protein (Aβ) into oligomers and amyloid fibrils is closely related to Alzheimer's disease (AD). Aβ40 and Aβ42, as two most prominent isoforms of Aβ peptides, can cross-interact with each other and form co-aggregates, which affect the progression of the disease. However, the molecular determinants underlying Aβ40 and Aβ42 cross-interaction and the structural details of their co-oligomers remain elusive. Herein, we performed all-atom explicit-solvent replica exchange molecular dynamics simulations on Aβ40-Aβ42 heterogeneous and Aβ40/Aβ42 homogeneous dimer systems to dissect the co-aggregation mechanisms of the two isoforms. Our results show that the interpeptide main-chain interaction of Aβ40-Aβ42 is stronger than that of Aβ40-Aβ40 and Aβ42-Aβ42. The positions of hotspot residues in heterodimers and homodimers display high similarity, implying similar molecular recognition sites for both cross-interaction and self-interaction. Contact maps of Aβ40-Aβ42 heterodimers reveal that residue pairs crucial for cross-interaction are mostly located in the C-terminal hydrophobic regions of Aβ40 and Aβ42 peptides. Conformational analysis shows that Aβ40 and Aβ42 monomers can co-assemble into β-sheet-rich heterodimers with shorter β-sheets than those in homodimers, which is decremental to monomer addition. Similar molecular recognition sites and β-sheet distribution of Aβ40 and Aβ42 peptides are observed in heterodimers and homodimers, which may provide the molecular basis for the two isoforms' co-aggregation and cross-seeding. Our work dissects the co-aggregation mechanisms of Aβ40 and Aβ42 peptides at the atomic level, which will help for in-depth understanding of the cross-talk between the two Aβ isoforms and the pathogenesis of AD.
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Affiliation(s)
- Xuhua Li
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
- State Key Laboratory of Surface Physics, Key Laboratory for Computational Physical Sciences (Ministry of Education), and Department of Physics, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Zhiwei Yang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yujie Chen
- State Key Laboratory of Surface Physics, Key Laboratory for Computational Physical Sciences (Ministry of Education), and Department of Physics, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Shengli Zhang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
| | - Guanghong Wei
- State Key Laboratory of Surface Physics, Key Laboratory for Computational Physical Sciences (Ministry of Education), and Department of Physics, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Lei Zhang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
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43
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Kim S, Fuselier J, Latoff A, Manges J, Jazwinski SM, Zsombok A. Upregulation of extracellular proteins in a mouse model of Alzheimer's disease. Sci Rep 2023; 13:6998. [PMID: 37117484 PMCID: PMC10147640 DOI: 10.1038/s41598-023-33677-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 04/17/2023] [Indexed: 04/30/2023] Open
Abstract
Various risk factors of Alzheimer's disease (AD) are known, such as advanced age, possession of certain genetic variants, accumulation of toxic amyloid-β (Aβ) peptides, and unhealthy lifestyle. An estimate of heritability of AD ranges from 0.13 to 0.25, indicating that its phenotypic variation is accounted for mostly by non-genetic factors. DNA methylation is regarded as an epigenetic mechanism that interfaces the genome with non-genetic factors. The Tg2576 mouse model has been insightful in AD research. These transgenic mice express a mutant form of human amyloid precursor protein linked to familial AD. At 9-13 months of age, these mice show elevated levels of Aβ peptides and cognitive impairment. The current literature lacks integrative multiomics of the animal model. We applied transcriptomics and DNA methylomics to the same brain samples from ~ 11-month-old transgenic mice. We found that genes involved in extracellular matrix structures and functions are transcriptionally upregulated, and genes involved in extracellular protein secretion and localization are differentially methylated in the transgenic mice. Integrative analysis found enrichment of GO terms related to memory and synaptic functionability. Our results indicate a possibility of transcriptional modulation by DNA methylation underlying AD neuropathology.
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Affiliation(s)
- Sangkyu Kim
- Tulane Center for Aging and Deming Department of Medicine, Tulane University Health Sciences Center, New Orleans, LA, USA.
- Deming Department of Medicine, Tulane University Health Sciences Center, 1430 Tulane Ave., MBC 8513, New Orleans, LA, 70112, USA.
| | - Jessica Fuselier
- Tulane Center for Aging and Deming Department of Medicine, Tulane University Health Sciences Center, New Orleans, LA, USA
- Data Science Department, Catalytic Data Science, Charleston, SC, USA
| | - Anna Latoff
- Tulane Center for Aging and Deming Department of Medicine, Tulane University Health Sciences Center, New Orleans, LA, USA
| | - Justin Manges
- Tulane Center for Aging and Deming Department of Medicine, Tulane University Health Sciences Center, New Orleans, LA, USA
| | - S Michal Jazwinski
- Tulane Center for Aging and Deming Department of Medicine, Tulane University Health Sciences Center, New Orleans, LA, USA
| | - Andrea Zsombok
- Tulane Center for Aging and Department of Physiology, Tulane University Health Sciences Center, New Orleans, LA, USA
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44
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Mulberry G, White KA, Crocker MA, Kim BN. A 512-Ch Dual-Mode Microchip for Simultaneous Measurements of Electrophysiological and Neurochemical Activities. BIOSENSORS 2023; 13:bios13050502. [PMID: 37232863 DOI: 10.3390/bios13050502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/22/2023] [Accepted: 04/25/2023] [Indexed: 05/27/2023]
Abstract
In the study of the brain, large and high-density microelectrode arrays have been widely used to study the behavior of neurotransmission. CMOS technology has facilitated these devices by enabling the integration of high-performance amplifiers directly on-chip. Usually, these large arrays measure only the voltage spikes resulting from action potentials traveling along firing neuronal cells. However, at synapses, communication between neurons occurs by the release of neurotransmitters, which cannot be measured on typical CMOS electrophysiology devices. Development of electrochemical amplifiers has resulted in the measurement of neurotransmitter exocytosis down to the level of a single vesicle. To effectively monitor the complete picture of neurotransmission, measurement of both action potentials and neurotransmitter activity is needed. Current efforts have not resulted in a device that is capable of the simultaneous measurement of action potential and neurotransmitter release at the same spatiotemporal resolution needed for a comprehensive study of neurotransmission. In this paper, we present a true dual-mode CMOS device that fully integrates 256-ch electrophysiology amplifiers and 256-ch electrochemical amplifiers, along with an on-chip 512 electrode microelectrode array capable of simultaneous measurement from all 512 channels.
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Affiliation(s)
- Geoffrey Mulberry
- Department of Electrical and Computer Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Kevin A White
- Department of Electrical and Computer Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Matthew A Crocker
- Department of Electrical and Computer Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Brian N Kim
- Department of Electrical and Computer Engineering, University of Central Florida, Orlando, FL 32816, USA
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45
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Sulimai N, Brown J, Lominadze D. Vascular Effects on Cerebrovascular Permeability and Neurodegeneration. Biomolecules 2023; 13:biom13040648. [PMID: 37189395 DOI: 10.3390/biom13040648] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/29/2023] [Accepted: 04/02/2023] [Indexed: 05/17/2023] Open
Abstract
Neurons and glial cells in the brain are protected by the blood brain barrier (BBB). The local regulation of blood flow is determined by neurons and signal conducting cells called astrocytes. Although alterations in neurons and glial cells affect the function of neurons, the majority of effects are coming from other cells and organs of the body. Although it seems obvious that effects beginning in brain vasculature would play an important role in the development of various neuroinflammatory and neurodegenerative pathologies, significant interest has only been directed to the possible mechanisms involved in the development of vascular cognitive impairment and dementia (VCID) for the last decade. Presently, the National Institute of Neurological Disorders and Stroke applies considerable attention toward research related to VCID and vascular impairments during Alzheimer's disease. Thus, any changes in cerebral vessels, such as in blood flow, thrombogenesis, permeability, or others, which affect the proper vasculo-neuronal connection and interaction and result in neuronal degeneration that leads to memory decline should be considered as a subject of investigation under the VCID category. Out of several vascular effects that can trigger neurodegeneration, changes in cerebrovascular permeability seem to result in the most devastating effects. The present review emphasizes the importance of changes in the BBB and possible mechanisms primarily involving fibrinogen in the development and/or progression of neuroinflammatory and neurodegenerative diseases resulting in memory decline.
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Affiliation(s)
- Nurul Sulimai
- Department of Surgery, College of Medicine, University of South Florida Morsani, Tampa, FL 33612, USA
| | - Jason Brown
- Department of Surgery, College of Medicine, University of South Florida Morsani, Tampa, FL 33612, USA
| | - David Lominadze
- Department of Surgery, College of Medicine, University of South Florida Morsani, Tampa, FL 33612, USA
- Department of Molecular Pharmacology and Physiology, College of Medicine, University of South Florida Morsani, Tampa, FL 33612, USA
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46
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Ganbat D, Jeon JK, Lee Y, Kim SS. Exploring the Pathological Effect of Aβ42 Oligomers on Neural Networks in Primary Cortical Neuron Culture. Int J Mol Sci 2023; 24:ijms24076641. [PMID: 37047612 PMCID: PMC10094920 DOI: 10.3390/ijms24076641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 03/29/2023] [Accepted: 03/30/2023] [Indexed: 04/05/2023] Open
Abstract
Alzheimer’s disease (AD) is a multifactorial disorder that affects cognitive functioning, behavior, and neuronal properties. The neuronal dysfunction is primarily responsible for cognitive decline in AD patients, with many causal factors including plaque accumulation of Aβ42. Neural hyperactivity induced by Aβ42 deposition causes abnormalities in neural networks, leading to alterations in synaptic activity and interneuron dysfunction. Even though neuroimaging techniques elucidated the underlying mechanism of neural connectivity, precise understanding at the cellular level is still elusive. Previous multielectrode array studies have examined the neuronal network modulation in in vitro cultures revealing the relevance of ion channels and the chemical modulators in the presence of Aβ42. In this study, we investigated neuronal connectivity and dynamic changes using a high-density multielectrode array, particularly looking at network-wide parameter changes over time. By comparing the neuronal network between normal and Aβ42treated neuronal cultures, it was possible to discover the direct pathological effect of the Aβ42 oligomer altering the network characteristics. The detrimental effects of the Aβ42 oligomer included not only a decline in spike activation but also a qualitative impairment in neural connectivity as well as a disorientation of dispersibility. As a result, this will improve our understanding of how neural networks are modified during AD progression.
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Affiliation(s)
- Dulguun Ganbat
- Department of Pharmacy, Hanyang University, Ansan 15588, Republic of Korea
| | - Jae Kyong Jeon
- Department of Pharmacy, Hanyang University, Ansan 15588, Republic of Korea
| | - Yunjong Lee
- Department of Pharmacology, School of Medicine, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Sang Seong Kim
- Department of Pharmacy, Hanyang University, Ansan 15588, Republic of Korea
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47
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Chakraborty D, Straub JE, Thirumalai D. Energy landscapes of Aβ monomers are sculpted in accordance with Ostwald's rule of stages. SCIENCE ADVANCES 2023; 9:eadd6921. [PMID: 36947617 PMCID: PMC10032606 DOI: 10.1126/sciadv.add6921] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
The transition from a disordered to an assembly-competent monomeric state (N*) in amyloidogenic sequences is a crucial event in the aggregation cascade. Using a well-calibrated model for intrinsically disordered proteins (IDPs), we show that the N* states, which bear considerable resemblance to the polymorphic fibril structures found in experiments, not only appear as excitations in the free energy landscapes of Aβ40 and Aβ42, but also initiate the aggregation cascade. For Aβ42, the transitions to the different N* states are in accord with Ostwald's rule of stages, with the least stable structures forming ahead of thermodynamically favored ones. The Aβ40 and Aβ42 monomer landscapes exhibit different extents of local frustration, which we show have profound implications in dictating subsequent self-assembly. Using kinetic transition networks, we illustrate that the most favored dimerization routes proceed via N* states. We argue that Ostwald's rule also holds for the aggregation of fused in sarcoma and polyglutamine proteins.
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Affiliation(s)
- Debayan Chakraborty
- Department of Chemistry, The University of Texas at Austin, 105 E 24th Street, Stop A5300, Austin TX 78712, USA
| | - John E. Straub
- Department of Chemistry, Boston University, MA 022155, USA
| | - D. Thirumalai
- Department of Chemistry, The University of Texas at Austin, 105 E 24th Street, Stop A5300, Austin TX 78712, USA
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48
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Timalsina B, Haque MN, Choi HJ, Dash R, Moon IS. Thymol in Trachyspermum ammi seed extract exhibits neuroprotection, learning, and memory enhancement in scopolamine-induced Alzheimer's disease mouse model. Phytother Res 2023. [PMID: 36808768 DOI: 10.1002/ptr.7777] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 09/18/2022] [Accepted: 01/29/2023] [Indexed: 02/22/2023]
Abstract
Several reports have stated the neuroprotective and learning/memory effects of Tachyspermum ammi seed extract (TASE) and its principal component thymol; however, little is known about its underlying molecular mechanisms and neurogenesis potential. This study aimed to provide insights into TASE and a thymol-mediated multifactorial therapeutic approach in a scopolamine-induced Alzheimer's disease (AD) mouse model. TASE and thymol supplementation significantly reduced oxidative stress markers such as brain glutathione, hydrogen peroxide, and malondialdehyde in mouse whole brain homogenates. Tumor necrosis factor-alpha was significantly downregulated, whereas the elevation of brain-derived neurotrophic factor and phospho-glycogen synthase kinase-3 beta (serine 9) enhanced learning and memory in the TASE- and thymol-treated groups. A significant reduction in the accumulation of Aβ 1-42 peptides was observed in the brains of TASE- and thymol-treated mice. Furthermore, TASE and thymol significantly promoted adult neurogenesis, with increased doublecortin positive neurons in the subgranular and polymorphic zones of the dentate gyrus in treated-mice. Collectively, TASE and thymol could potentially act as natural therapeutic agents for the treatment of neurodegenerative disorders, such as AD.
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Affiliation(s)
- Binod Timalsina
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju, Korea
| | - Md Nazmul Haque
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju, Korea.,Department of Fisheries Biology and Genetics, Patuakhali Science and Technology University, Patuakhali, Bangladesh
| | - Ho Jin Choi
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju, Korea
| | - Raju Dash
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju, Korea
| | - Il Soo Moon
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju, Korea
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49
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Matthes D, de Groot BL. Molecular dynamics simulations reveal the importance of amyloid-beta oligomer β-sheet edge conformations in membrane permeabilization. J Biol Chem 2023; 299:103034. [PMID: 36806684 PMCID: PMC10033322 DOI: 10.1016/j.jbc.2023.103034] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 02/03/2023] [Accepted: 02/13/2023] [Indexed: 02/18/2023] Open
Abstract
Oligomeric aggregates of the amyloid-beta peptide(1-42) (Aβ42) are regarded as a primary cause of cytotoxicity related to membrane damage in Alzheimer's disease. However, a dynamical and structural characterization of pore-forming Aβ42 oligomers at atomic detail has not been feasible. Here, we used Aβ42 oligomer structures previously determined in a membrane-mimicking environment as putative model systems to study the pore formation process in phospholipid bilayers with all-atom molecular dynamics simulations. Multiple Aβ42 oligomer sizes, conformations, and N-terminally truncated isoforms were investigated on the multi-μs time scale. We found that pore formation and ion permeation occur via edge conductivity and exclusively for β-sandwich structures that feature exposed side-by-side β-strand pairs formed by residues 9 to 21 of Aβ42. The extent of pore formation and ion permeation depends on the insertion depth of hydrophilic residues 13 to 16 (HHQK domain) and thus on subtle differences in the overall stability, orientation, and conformation of the aggregates in the membrane. Additionally, we determined that backbone carbonyl and polar side-chain atoms from the edge strands directly contribute to the coordination sphere of the permeating ions. Furthermore, point mutations that alter the number of favorable side-chain contacts correlate with the ability of the Aβ42 oligomer models to facilitate ion permeation in the bilayer center. Our findings suggest that membrane-inserted, layered β-sheet edges are a key structural motif in pore-forming Aβ42 oligomers independent of their size and play a pivotal role in aggregate-induced membrane permeabilization.
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Affiliation(s)
- Dirk Matthes
- Computational Biomolecular Dynamics Group, Department of Theoretical and Computational Biophysics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany.
| | - Bert L de Groot
- Computational Biomolecular Dynamics Group, Department of Theoretical and Computational Biophysics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
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50
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Li Z, Zheng G, Wang N, Liang H, Li C, Wang Y, Cui Y, Yang L. A Flower-like Brain Targeted Selenium Nanocluster Lowers the Chlorogenic Acid Dose for Ameliorating Cognitive Impairment in APP/PS1 Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:2883-2897. [PMID: 36722770 DOI: 10.1021/acs.jafc.2c06809] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Aβ aggregation-related neuroinflammation and imbalance of brain glucose homeostasis play important roles in the pathological process of Alzheimer's disease (AD). Chlorogenic acid (CGA) is one of the most common dietary polyphenols with neuroprotective effects. However, due to the low bioavailability of CGA, its application dose is usually high in vivo. In our previous study, the spherical selenium nanoparticles act as drug carriers to improve the bioactivity of resveratrol. Here, the brain-targeting peptide (TGN peptide) and CGA were used to prepare a new flowerlike selenium nanocluster (TGN-CGA@SeNCs) for enhancing the bioavailability of CGA. After decoration on selenium nanoclusters, the solubility and stability of CGA was obviously increased. Oral administration of a low dose of CGA (80 mg/kg/body weight) only slightly inhibited Aβ aggregate-related neuroinflammation and glucose homeostasis disorder in the brain. Moreover, CGA showed less effect on increasing the diversity and richness of gut microbiota. At the same concentration, the CGA-modified selenium nanocluster (CGA@SeNCs) and TGN-CGA@SeNCs showed better function in ameliorating the gut microbiota disorder. Especially, TGN-CGA@SeNCs significantly increased the relative abundance of Turicibacter, Colidextribacter, Ruminococcus, Alloprevotella, and Alistipes against oxidative stress, inflammation, and glucose homeostasis imbalance. Notably, only TGN-CGA@SeNCs can transport through the blood-brain barrier (BBB), and TGN-CGA@SeNCs showed better effects than CGA@SeNCs in regulating Aβ aggregation and improving brain glucose homeostasis. These results broadened the application of TGN-CGA@SeNCs, effectively improving the bioactivity of CGA, which also lowers the CGA dose for preventing AD progression.
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Affiliation(s)
- Zhiwei Li
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Guodong Zheng
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Na Wang
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Hanji Liang
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Changjiang Li
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Yabin Wang
- Jiangxi Key Laboratory of Natural Product and Functional Food, College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Yanan Cui
- College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, China
| | - Licong Yang
- College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, China
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