1
|
Mallesh R, Khan J, Gharai PK, Arshi MU, Garg S, Gupta S, Ghosh S. Hydrophobic C-Terminal Peptide Analog Aβ 31-41 Protects the Neurons from Aβ-Induced Toxicity. ACS Chem Neurosci 2024; 15:2372-2385. [PMID: 38822790 DOI: 10.1021/acschemneuro.4c00032] [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] [Indexed: 06/03/2024] Open
Abstract
Spontaneous aggregation of amyloid beta (Aβ) leads to the formation of neurotoxic senile plaque considered as the most crucial event in Alzheimer's disease (AD) progression. Inhibition or disruption of this deadly aggregate formation is one of the most efficient strategies for the development of potential therapeutics, and extensive research is in progress by various research groups. In this direction, the development of a peptide analogous to that of the native Aβ peptide is an attractive strategy. Based on this rationale, β-sheet breakers were developed from the Aβ central hydrophobic core. These peptide derivatives will bind to the full length of the parent Aβ and interfere in self-recognition, thereby preventing the folding of the Aβ peptide into cross β-sheet neurotoxic aggregates. However, this approach is effective in the inhibition of fibrillar aggregation, but this strategy is ineffective in the Aβ neurotoxic oligomer formation. Therefore, an alternative and efficient approach is to use the Aβ peptide analogous to the C-terminal region, which arbitrates fibrillation and oligomerization. Herein, we developed the Aβ C-terminal fragment (ACT-1 to ACT-7) for inhibition of oligomerization as well as fibrillar aggregation. Screening of these seven peptides resulted in an efficient anti-Aβ peptide aggregative agent (ACT-7), which was evaluated by the ThT assay peptide. The ThT assay reveals complete inhibition and showed significant neuroprotection of PC-12-derived neurons from Aβ-induced toxicity and reduced cell apoptosis. Further, analysis using CD and FTIR spectroscopy reveals that the ACT-7 peptide efficiently inhibits the formation of the β-sheet secondary structure content. HR-TEM microscopic analysis confirmed the inhibition of formation. Therefore, the inhibition of β-sheet Aβ fibrillary aggregation by the protease-stable ACT-7 peptide may provide a beneficial effect on AD treatment to control the Aβ aggregates. Finally, we anticipate that our newly designed ACT peptides may also assist as a template molecular scaffold for designing potential anti-AD therapeutics.
Collapse
Affiliation(s)
- Rathnam Mallesh
- Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, NH 65, Surpura Bypass Road, Karwar, Jodhpur, Rajasthan 342037, India
- Organic and Medicinal Chemistry and Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata, WB 700 032, India
- National Institute of Pharmaceutical Education and Research, Kolkata, Chunilal Bhawan 168, Maniktala Main Road, Kolkata 700054, India
| | - Juhee Khan
- Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, NH 65, Surpura Bypass Road, Karwar, Jodhpur, Rajasthan 342037, India
- Organic and Medicinal Chemistry and Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata, WB 700 032, India
| | - Prabir Kumar Gharai
- Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, NH 65, Surpura Bypass Road, Karwar, Jodhpur, Rajasthan 342037, India
- Organic and Medicinal Chemistry and Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata, WB 700 032, India
| | - Mohammad Umar Arshi
- Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, NH 65, Surpura Bypass Road, Karwar, Jodhpur, Rajasthan 342037, India
| | - Shubham Garg
- Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, NH 65, Surpura Bypass Road, Karwar, Jodhpur, Rajasthan 342037, India
| | - Sanju Gupta
- Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, NH 65, Surpura Bypass Road, Karwar, Jodhpur, Rajasthan 342037, India
| | - Surajit Ghosh
- Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, NH 65, Surpura Bypass Road, Karwar, Jodhpur, Rajasthan 342037, India
- Organic and Medicinal Chemistry and Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata, WB 700 032, India
- National Institute of Pharmaceutical Education and Research, Kolkata, Chunilal Bhawan 168, Maniktala Main Road, Kolkata 700054, India
| |
Collapse
|
2
|
Elmahboub YS, Elkordy AA. Polymeric nanoparticles: A promising strategy for treatment of Alzheimer's disease. J Taibah Univ Med Sci 2024; 19:549-565. [PMID: 38736898 PMCID: PMC11087974 DOI: 10.1016/j.jtumed.2024.04.004] [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: 11/10/2023] [Revised: 03/15/2024] [Accepted: 04/16/2024] [Indexed: 05/14/2024] Open
Abstract
Alzheimer's disease (AD), is characterised by two major hallmarks: the formation of extracellular β-amyloid (Aβ) plaques and the hyperphosphorylation of tau protein, thus leading to the formation of neurofibrillary tangles. These hallmarks cause synaptic loss, neuronal damage, and the development of neuroinflammation and oxidative stress, which promote AD progression. Thus, the goal of treating AD is eliminating these hallmarks, to prevent AD progression and decrease symptoms. However, current available therapies provide symptomatic relief rather than treating the underlying cause of the disease, because the restrictive nature of the blood brain barrier (BBB) impedes the entry of drugs, thereby affecting drug efficacy and bioavailability. Researchers are focusing on developing new therapeutic approaches to bypass the BBB, for achieving site-specific drug delivery with the highest possible bioavailability and the lowest adverse effects. Recently explored therapeutic strategies include use of biologic agents such as monoclonal antibodies. Aducanumab, a strong candidate for treating AD, has been granted accelerated Food and Drug Administration approval; however, safety concerns may hinder its future use. Thus, nanotechnological approaches have led to a new era of AD treatment. Nanoparticles (NPs), because of their small particle size, can cross the BBB, thus enhancing drug pharmacokinetic properties and enabling targeted drug delivery. Polymeric NPs have been extensively studied, because of their simple production, biodegradability, biocompatibility, and unique architecture. These NPs provide a flexible vesicle that can be easily tailored to achieve desired physicochemical features. In this review, various types of polymer-based-NPs are discussed, highlighting the properties of fabricated NPs, which have multiple benefits in AD treatment, including anti-amyloid, antioxidant, and anti-inflammatory effects.
Collapse
Affiliation(s)
- Yasmina S.M. Elmahboub
- School of Pharmacy and Pharmaceutical Sciences, Faculty of Health Sciences and Wellbeing, University of Sunderland, Sunderland SR1 3SD, UK
| | - Amal A. Elkordy
- School of Pharmacy and Pharmaceutical Sciences, Faculty of Health Sciences and Wellbeing, University of Sunderland, Sunderland SR1 3SD, UK
| |
Collapse
|
3
|
Paul PS, Patel T, Cho JY, Yarahmady A, Khalili A, Semenchenko V, Wille H, Kulka M, Mok SA, Kar S. Native PLGA nanoparticles attenuate Aβ-seed induced tau aggregation under in vitro conditions: potential implication in Alzheimer's disease pathology. Sci Rep 2024; 14:144. [PMID: 38167993 PMCID: PMC10762165 DOI: 10.1038/s41598-023-50465-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: 08/29/2023] [Accepted: 12/20/2023] [Indexed: 01/05/2024] Open
Abstract
Evidence suggests that beta-amyloid (Aβ)-induced phosphorylation/aggregation of tau protein plays a critical role in the degeneration of neurons and development of Alzheimer's disease (AD), the most common cause of dementia affecting the elderly population. Many studies have pursued a variety of small molecules, including nanoparticles conjugated with drugs to interfere with Aβ and/or tau aggregation/toxicity as an effective strategy for AD treatment. We reported earlier that FDA approved PLGA nanoparticles without any drug can attenuate Aβ aggregation/toxicity in cellular/animal models of AD. In this study, we evaluated the effects of native PLGA on Aβ seed-induced aggregation of tau protein using a variety of biophysical, structural and spectroscopic approaches. Our results show that Aβ1-42 seeds enhanced aggregation of tau protein in the presence and absence of heparin and the effect was attenuated by native PLGA nanoparticles. Interestingly, PLGA inhibited aggregation of both 4R and 3R tau isoforms involved in the formation of neurofibrillary tangles in AD brains. Furthermore, Aβ seed-induced tau aggregation in the presence of arachidonic acid was suppressed by native PLGA. Collectively, our results suggest that native PLGA nanoparticles can inhibit the Aβ seed-induced aggregation of different tau protein isoforms highlighting their therapeutic implication in the treatment of AD.
Collapse
Affiliation(s)
- Pallabi Sil Paul
- Departments of Medicine (Neurology), Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, AB, T6G 2M8, Canada
| | - Tark Patel
- Departments of Biochemistry, Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, AB, T6G 2M8, Canada
| | - Jae-Young Cho
- Nanotechnology Research Centre, National Research Council Canada, Edmonton, AB, T6G 2M9, Canada
| | - Allan Yarahmady
- Departments of Biochemistry, Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, AB, T6G 2M8, Canada
| | - Aria Khalili
- Nanotechnology Research Centre, National Research Council Canada, Edmonton, AB, T6G 2M9, Canada
| | - Valentyna Semenchenko
- Nanotechnology Research Centre, National Research Council Canada, Edmonton, AB, T6G 2M9, Canada
| | - Holger Wille
- Departments of Biochemistry, Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, AB, T6G 2M8, Canada
| | - Marianna Kulka
- Nanotechnology Research Centre, National Research Council Canada, Edmonton, AB, T6G 2M9, Canada
- Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, AB, T6G 2E1, Canada
| | - Sue-Ann Mok
- Departments of Biochemistry, Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, AB, T6G 2M8, Canada
| | - Satyabrata Kar
- Departments of Medicine (Neurology), Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, AB, T6G 2M8, Canada.
- Centre for Prions and Protein Folding Diseases, Departments of Medicine (Neurology) and Psychiatry, University of Alberta, Edmonton, AB, T6G 2M8, Canada.
| |
Collapse
|
4
|
Zuo X, Chen M, Zhang X, Guo A, Cheng S, Zhang R. Transcriptomic and metabolomic analyses to study the key role by which Ralstonia insidiosa induces Listeria monocytogenes to form suspended aggregates. Front Microbiol 2023; 14:1260909. [PMID: 37901811 PMCID: PMC10601645 DOI: 10.3389/fmicb.2023.1260909] [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: 07/18/2023] [Accepted: 09/14/2023] [Indexed: 10/31/2023] Open
Abstract
Ralstonia insidiosa can survive in a wide range of aqueous environments, including food processing areas, and is harmful to humans. It can induce Listeria monocytogenes to form suspended aggregates, resulting from the co-aggregation of two bacteria, which allows for more persistent survival and increases the risk of L. monocytogenes contamination. In our study, different groups of aggregates were analyzed and compared using Illumina RNA sequencing technology. These included R. insidiosa under normal and barren nutrient conditions and in the presence or absence of L. monocytogenes as a way to screen for differentially expressed genes (DEGs) in the process of aggregate formation. In addition, sterile supernatants of R. insidiosa were analyzed under different nutrient conditions using metabolomics to investigate the effect of nutrient-poor conditions on metabolite production by R. insidiosa. We also undertook a combined analysis of transcriptome and metabolome data to further investigate the induction effect of R. insidiosa on L. monocytogenes in a barren environment. The results of the functional annotation analysis on the surface of DEGs and qPCR showed that under nutrient-poor conditions, the acdx, puuE, and acs genes of R. insidiosa were significantly upregulated in biosynthetic processes such as carbon metabolism, metabolic pathways, and biosynthesis of secondary metabolites, with Log2FC reaching 4.39, 3.96, and 3.95 respectively. In contrast, the Log2FC of cydA, cyoB, and rpsJ in oxidative phosphorylation and ribosomal pathways reached 3.74, 3.87, and 4.25, respectively. Thirty-one key components were identified while screening for differential metabolites, which mainly included amino acids and their metabolites, enriched to the pathways of biosynthesis of amino acids, phenylalanine metabolism, and methionine metabolism. Of these, aminomalonic acid and Proximicin B were the special components of R. insidiosa that were metabolized under nutrient-poor conditions.
Collapse
Affiliation(s)
- Xifeng Zuo
- National Research and Development Center for Egg Processing, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Meilin Chen
- National Research and Development Center for Egg Processing, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Xinshuai Zhang
- National Research and Development Center for Egg Processing, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Ailing Guo
- National Research and Development Center for Egg Processing, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Si Cheng
- National Research and Development Center for Egg Processing, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Rong Zhang
- Liunan District Modern Agricultural Industry Service Center of Liuzhou City, Liuzhou, Guangxi, China
| |
Collapse
|
5
|
Song N, Sun S, Chen K, Wang Y, Wang H, Meng J, Guo M, Zhang XD, Zhang R. Emerging nanotechnology for Alzheimer's disease: From detection to treatment. J Control Release 2023; 360:392-417. [PMID: 37414222 DOI: 10.1016/j.jconrel.2023.07.004] [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: 03/03/2023] [Revised: 06/15/2023] [Accepted: 07/03/2023] [Indexed: 07/08/2023]
Abstract
Alzheimer's disease (AD), one of the most common chronic neurodegenerative diseases, is characterized by memory impairment, synaptic dysfunction, and character mutations. The pathological features of AD are Aβ accumulation, tau protein enrichment, oxidative stress, and immune inflammation. Since the pathogenesis of AD is complicated and ambiguous, it is still challenging to achieve early detection and timely treatment of AD. Due to the unique physical, electrical, magnetic, and optical properties of nanoparticles (NPs), nanotechnology has shown great potential for detecting and treating AD. This review provides an overview of the latest developments in AD detection via nanotechnology based on NPs with electrochemical sensing, optical sensing, and imaging techniques. Meanwhile, we highlight the important advances in nanotechnology-based AD treatment through targeting disease biomarkers, stem-cell therapy and immunotherapy. Furthermore, we summarize the current challenges and present a promising prospect for nanotechnology-based AD diagnosis and intervention.
Collapse
Affiliation(s)
- Nan Song
- Department of Physics, School of Science, Tianjin Chengjian University, Tianjin 300384, China
| | - Si Sun
- Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Sciences, Tianjin University, Tianjin 300350, China
| | - Ke Chen
- Tianjin Key Laboratory of Brain Science and Neural Engineering, Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin 300072, China
| | - Yang Wang
- Tianjin Key Laboratory of Brain Science and Neural Engineering, Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin 300072, China
| | - Hao Wang
- Tianjin Key Laboratory of Brain Science and Neural Engineering, Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin 300072, China
| | - Jian Meng
- The First Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Meili Guo
- Department of Physics, School of Science, Tianjin Chengjian University, Tianjin 300384, China.
| | - Xiao-Dong Zhang
- Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Sciences, Tianjin University, Tianjin 300350, China; Tianjin Key Laboratory of Brain Science and Neural Engineering, Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin 300072, China.
| | - Ruiping Zhang
- The First Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, China.
| |
Collapse
|
6
|
Ali T, Klein AN, McDonald K, Johansson L, Mukherjee PG, Hallbeck M, Doh-Ura K, Schatzl HM, Gilch S. Cellulose ether treatment inhibits amyloid beta aggregation, neuroinflammation and cognitive deficits in transgenic mouse model of Alzheimer's disease. J Neuroinflammation 2023; 20:177. [PMID: 37507761 PMCID: PMC10375631 DOI: 10.1186/s12974-023-02858-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 07/23/2023] [Indexed: 07/30/2023] Open
Abstract
Alzheimer's disease (AD) is an incurable, progressive and devastating neurodegenerative disease. Pathogenesis of AD is associated with the aggregation and accumulation of amyloid beta (Aβ), a major neurotoxic mediator that triggers neuroinflammation and memory impairment. Recently, we found that cellulose ether compounds (CEs) have beneficial effects against prion diseases by inhibiting protein misfolding and replication of prions, which share their replication mechanism with Aβ. CEs are FDA-approved safe additives in foods and pharmaceuticals. Herein, for the first time we determined the therapeutic effects of the representative CE (TC-5RW) in AD using in vitro and in vivo models. Our in vitro studies showed that TC-5RW inhibits Aβ aggregation, as well as neurotoxicity and immunoreactivity in Aβ-exposed human and murine neuroblastoma cells. In in vivo studies, for the first time we observed that single and weekly TC-5RW administration, respectively, improved memory functions of transgenic 5XFAD mouse model of AD. We further demonstrate that TC-5RW treatment of 5XFAD mice significantly inhibited Aβ oligomer and plaque burden and its associated neuroinflammation via regulating astrogliosis, microgliosis and proinflammatory mediator glial maturation factor beta (GMFβ). Additionally, we determined that TC-5RW reduced lipopolysaccharide-induced activated gliosis and GMFβ in vitro. In conclusion, our results demonstrate that CEs have therapeutic effects against Aβ pathologies and cognitive impairments, and direct, potent anti-inflammatory activity to rescue neuroinflammation. Therefore, these FDA-approved compounds are effective candidates for developing therapeutics for AD and related neurodegenerative diseases associated with protein misfolding.
Collapse
Affiliation(s)
- Tahir Ali
- Calgary Prion Research Unit, Faculty of Veterinary Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4Z6, Canada.
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada.
| | - Antonia N Klein
- Calgary Prion Research Unit, Faculty of Veterinary Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4Z6, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Keegan McDonald
- Calgary Prion Research Unit, Faculty of Veterinary Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4Z6, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Lovisa Johansson
- Department of Biomedical and Clinical Sciences (BKV), Linköping University, 58185, Linköping, Sweden
| | | | - Martin Hallbeck
- Department of Biomedical and Clinical Sciences (BKV), Linköping University, 58185, Linköping, Sweden
| | - Katsumi Doh-Ura
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Hermann M Schatzl
- Calgary Prion Research Unit, Faculty of Veterinary Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4Z6, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Sabine Gilch
- Calgary Prion Research Unit, Faculty of Veterinary Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4Z6, Canada.
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada.
| |
Collapse
|
7
|
Hu L, Tao Y, Jiang Y, Qin F. Recent progress of nanomedicine in the treatment of Alzheimer's disease. Front Cell Dev Biol 2023; 11:1228679. [PMID: 37457297 PMCID: PMC10340527 DOI: 10.3389/fcell.2023.1228679] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 06/23/2023] [Indexed: 07/18/2023] Open
Abstract
Alzheimer's disease (AD) is the most common cause of memory disruption in elderly subjects, with the prevalence continuing to rise mainly because of the aging world population. Unfortunately, no efficient therapy is currently available for the AD treatment, due to low drug potency and several challenges to delivery, including low bioavailability and the impediments of the blood-brain barrier. Recently, nanomedicine has gained considerable attention among researchers all over the world and shown promising developments in AD treatment. A wide range of nano-carriers, such as polymer nanoparticles, liposomes, solid lipid nanoparticles, dendritic nanoparticles, biomimetic nanoparticles, magnetic nanoparticles, etc., have been adapted to develop successful new treatment strategies. This review comprehensively summarizes the recent advances of different nanomedicine for their efficacy in pre-clinical studies. Finally, some insights and future research directions are proposed. This review can provide useful information to guide the future design and evaluation of nanomedicine in AD treatment.
Collapse
Affiliation(s)
- Liqiang Hu
- Mental Health Center and West China-California Research Center for Predictive Intervention Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Yiran Tao
- Mental Health Center and West China-California Research Center for Predictive Intervention Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Yanjiao Jiang
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, China
| | - Feng Qin
- Andrology Laboratory, West China Hospital, Sichuan University, Chengdu, China
- National Chengdu Center for Safety Evaluation of Drugs, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| |
Collapse
|
8
|
Lo CH, Zeng J. Defective lysosomal acidification: a new prognostic marker and therapeutic target for neurodegenerative diseases. Transl Neurodegener 2023; 12:29. [PMID: 37287072 DOI: 10.1186/s40035-023-00362-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 05/12/2023] [Indexed: 06/09/2023] Open
Abstract
Lysosomal acidification dysfunction has been implicated as a key driving factor in the pathogenesis of neurodegenerative diseases, including Alzheimer's disease and Parkinson's disease. Multiple genetic factors have been linked to lysosomal de-acidification through impairing the vacuolar-type ATPase and ion channels on the organelle membrane. Similar lysosomal abnormalities are also present in sporadic forms of neurodegeneration, although the underlying pathogenic mechanisms are unclear and remain to be investigated. Importantly, recent studies have revealed early occurrence of lysosomal acidification impairment before the onset of neurodegeneration and late-stage pathology. However, there is a lack of methods for organelle pH monitoring in vivo and a dearth of lysosome-acidifying therapeutic agents. Here, we summarize and present evidence for the notion of defective lysosomal acidification as an early indicator of neurodegeneration and urge the critical need for technological advancement in developing tools for lysosomal pH monitoring and detection both in vivo and for clinical applications. We further discuss current preclinical pharmacological agents that modulate lysosomal acidification, including small molecules and nanomedicine, and their potential clinical translation into lysosome-targeting therapies. Both timely detection of lysosomal dysfunction and development of therapeutics that restore lysosomal function represent paradigm shifts in targeting neurodegenerative diseases.
Collapse
Affiliation(s)
- Chih Hung Lo
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore.
| | - Jialiu Zeng
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore.
| |
Collapse
|
9
|
Khan S, Hassan MI, Shahid M, Islam A. Nature's Toolbox Against Tau Aggregation: An Updated Review of Current Research. Ageing Res Rev 2023; 87:101924. [PMID: 37004844 DOI: 10.1016/j.arr.2023.101924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/21/2023] [Accepted: 03/30/2023] [Indexed: 04/03/2023]
Abstract
Tau aggregation is a hallmark of several neurodegenerative disorders, such as Alzheimer's disease (AD), frontotemporal dementia, and progressive supranuclear palsy. Hyperphosphorylated tau is believed to contribute to the degeneration of neurons and the development of these complex diseases. Therefore, one potential treatment for these illnesses is to prevent or counteract tau aggregation. In recent years, interest has been increasing in developing nature-derived tau aggregation inhibitors as a potential treatment for neurodegenerative disorders. Researchers have become increasingly interested in natural compounds with multifunctional features, such as flavonoids, alkaloids, resveratrol, and curcumin, since these molecules can interact simultaneously with the various targets of AD. Recent studies have demonstrated that several natural compounds can inhibit tau aggregation and promote the disassembly of pre-formed tau aggregates. Nature-derived tau aggregation inhibitors hold promise as a potential treatment for neurodegenerative disorders. However, it is important to note that more research is needed to fully understand the mechanisms by which these compounds exert their effects and their safety and efficacy in preclinical and clinical studies. Nature-derived inhibitors of tau aggregation are a promising new direction in the research of neurodegenerative complexities. This review focuses on the natural products that have proven to be a rich supply for inhibitors in tau aggregation and their uses in neurodegenerative complexities, including AD.
Collapse
|
10
|
Cetin Aluc C, Gok B, Kecel-Gunduz S, Budama-Kilinc Y. Glycyrrhizic acid Poly(D,L-lactide-co-glycolide) nanoparticles: anti-aging cosmeceutical formulation for topical applications. PeerJ 2022. [DOI: 10.7717/peerj.14139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Glycyrrhizic acid (GA) is one of the components of licorice roots (Glycyrrhiza glabra L.). GA is a triterpenoid saponin can be used as a medicinal plant with its antiallergic, antiviral, anti-inflammatory, anti-ulcer, hepatoprotective, anticancer, anti-oxidation activities and several other therapeutic properties. The aim of this study is to develop an anti-aging formulation for topical application containing GA. In this context, GA-loaded Poly (D,L-lactide-co-glycolide) (PLGA) nanoparticles (NPs) were prepared using the double emulsion method, and were characterized by various spectroscopic methods. The efficacy of GA-PLGA NPs was evaluated with in vitro and in silico methods. The encapsulation efficiency and loading capacity were calculated. The in vitro release study was conducted, and the GA release profile was determined. The genotoxic activity of GA and GA-PLGA NPs was evaluated by the Ames test using TA98 and TA100 mutant strains of Salmonella typhimurium. The cytotoxic potential of GA-PLGA NPs was evaluated on the HaCaT cell line using the MTT assay. According to the genotoxicity and cytotoxicity results, it was found that the GA-PLGA NP formulation did not exhibit genotoxic and cytotoxic effects. Moreover, the efficacy of GA in preventing UVB-induced photo-aging in HaCaT cells and the clarification of the molecular mechanism of GA binding to MMPs were revealed by molecular docking analysis. In addition, through molecular dynamics (MD) analysis, the binding interaction of GA with MMPs in a dynamic system, and protein-ligand stability were predicted as a result of 50 ns MD simulation studies considering various analysis parameters. Finally, it was evaluated that GA-PLGA nanoformulation might be used as an alternative anti-aging skin care product candidate via topical application.
Collapse
Affiliation(s)
- Cigdem Cetin Aluc
- Graduate School of Natural and Applied Science, Yildiz Technical University, Istanbul, Türkiye
- Abdi Ibrahim Pharmaceuticals, Abdi Ibrahim Production Facilities, Istanbul, Türkiye
| | - Bahar Gok
- Graduate School of Natural and Applied Science, Yildiz Technical University, Istanbul, Türkiye
| | | | | |
Collapse
|
11
|
Wu Q, Karthivashan G, Nakhaei-Nejad M, Anand BG, Giuliani F, Kar S. Native PLGA nanoparticles regulate APP metabolism and protect neurons against β-amyloid toxicity: Potential significance in Alzheimer's disease pathology. Int J Biol Macromol 2022; 219:1180-1196. [PMID: 36030976 DOI: 10.1016/j.ijbiomac.2022.08.148] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 08/18/2022] [Accepted: 08/22/2022] [Indexed: 11/05/2022]
Abstract
Biodegradable poly(lactic-co-glycolic acid)(PLGA) nanoparticles have been used extensively in delivering drugs to target tissues due to their excellent biocompatibility. Evidence suggests that PLGA-conjugated drugs/agents can attenuate pathology in cellular/animal models of Alzheimer's disease (AD), which is initiated by increased level/aggregation of amyloid β (Aβ) peptide generated from amyloid precursor protein (APP). The beneficial effects were attributed to conjugated-drugs rather than to PLGA nanoparticles. Interestingly, we recently reported that PLGA without any drug/agent (native PLGA) can suppress Aβ aggregation/toxicity. However, very little is known about the internalization, subcellular localization or effects of PLGA in neurons. In this study, using primary mouse cortical neurons, we first showed that native PLGA is internalized by an energy-mediated clathrin-dependent/-independent pathway and is localized in endosomal-lysosomal-autophagic vesicles. By attenuating internalization, PLGA can protect neurons against Aβ-mediated toxicity. Additionally, PLGA treatment altered expression profiles of certain AD-associated genes and decreased the levels of APP, its cleaved products α-/β-CTFs and Aβ peptides in mouse as well as iPSC-derived neurons from control and AD patients. Collectively, these results suggest that native PLGA not only protects neurons against Aβ-induced toxicity but also influences the expression of AD-related genes/proteins - highlighting PLGA's implication in normal and AD-related pathology.
Collapse
Affiliation(s)
- Qi Wu
- Departments of Medicine (Neurology), Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada.
| | - Govindarajan Karthivashan
- Departments of Medicine (Neurology), Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada.
| | - Maryam Nakhaei-Nejad
- Departments of Medicine (Neurology), Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada.
| | - Bibin G Anand
- Departments of Medicine (Neurology), Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada.
| | - Fabrizio Giuliani
- Departments of Medicine (Neurology), Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada.
| | - Satyabrata Kar
- Departments of Medicine (Neurology), Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada.
| |
Collapse
|