1
|
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] [What about the content of this article? (0)] [Affiliation(s)] [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
|
2
|
Warerkar OD, Mudliar NH, Momin MM, Singh PK. Targeting Amyloids with Coated Nanoparticles: A Review on Potential Combinations of Nanoparticles and Bio-Compatible Coatings. Crit Rev Ther Drug Carrier Syst 2024; 41:85-119. [PMID: 37938191 DOI: 10.1615/critrevtherdrugcarriersyst.2023046209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
Amyloidosis is the major cause of many neurodegenerative diseases, such as, Alzheimer's and Parkinson's where the misfolding and deposition of a previously functional protein make it inept for carrying out its function. The genesis of amyloid fibril formation and the strategies to inhibit it have been studied extensively, although some parts of this puzzle still remain unfathomable to date. Many classes of molecules have been explored as potential drugs in vitro, but their inability to work in vivo by crossing the blood-brain-barrier has made them an inadequate treatment option. In this regard, nanoparticles (NPs) have turned out to be an exciting alternative because they could overcome many drawbacks of previously studied molecules and provide advantages, such as, greater bioavailability of molecules and target-specific delivery of drugs. In this paper, we present an overview on several coated NPs which have shown promising efficiency in inhibiting fibril formation. A hundred and thirty papers published in the past two decades have been comprehensively reviewed, which majorly encompass NPs comprising different materials like gold, silver, iron-oxide, poly(lactic-co-glycolic acid), polymeric NP, etc., which are coated with various molecules of predominantly natural origin, such as different types of amino acids, peptides, curcumin, drugs, catechin, etc. We hope that this review will shed light on the advancement of symbiotic amalgamation of NPs with molecules from natural sources and will inspire further research on the tremendous therapeutic potential of these combinations for many amyloid-related diseases.
Collapse
Affiliation(s)
- Oshin D Warerkar
- SVKM's Shri C.B. Patel Research Centre, Vile Parle, Mumbai, Maharashtra 400056, India
| | - Niyati H Mudliar
- SVKM's Shri C.B. Patel Research Centre, Vile Parle, Mumbai, Maharashtra 400056, India
| | - Munira M Momin
- Department of Pharmaceutics, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Mumbai, Maharashtra, India; SVKM's Shri C.B. Patel Research Centre for Chemistry and Biological Sciences, Vile Parle (West), Mumbai, Maharashtra, 400056, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| |
Collapse
|
3
|
R PA, Anbarasu A. Antimicrobial Peptides as Immunomodulators and Antimycobacterial Agents to Combat Mycobacterium tuberculosis: a Critical Review. Probiotics Antimicrob Proteins 2023; 15:1539-1566. [PMID: 36576687 DOI: 10.1007/s12602-022-10018-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/22/2022] [Indexed: 12/29/2022]
Abstract
Tuberculosis (TB) is a devastating disease foisting a significantly high morbidity, prepotent in low- and middle-income developing countries. Evolution of drug resistance among Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis, has made the TB treatment more complicated. The protracted nature of present TB treatment, persistent and tolerant Mtb populations, interaction with antiretroviral therapy and existing toxicity concerned with conventional anti-TB drugs are the four major challenges inflicted with emergence of drug-resistant mycobacterial strains, and the standard medications are unable to combat these strains. These factors emphasize an exigency to develop new drugs to overcome these barriers in current TB therapy. With this regard, antimycobacterial peptides derived from various sources such as human cells, bacterial sources, mycobacteriophages, fungal, plant and animal sources could be considered as antituberculosis leads as most of these peptides are associated with dual advantages of having both bactericidal activity towards Mtb as well as immuno-regulatory property. Some of the peptides possess the additional advantage of interacting synergistically with antituberculosis medications too, thereby increasing their efficiency, underscoring the vigour of antimicrobial peptides (AMPs) as best possible alternative therapeutic candidates or adjuvants in TB treatment. Albeit the beneficiary features of these peptides, few obstacles allied with them like cytotoxicity and proteolytic degradation are matter of concerns too. In this review, we have focused on structural hallmarks, targeting mechanisms and specific structural aspects contributing to antimycobacterial activity and discovered natural and synthetic antimycobacterial peptides along with their sources, anti-TB, immuno-regulatory properties, merits and demerits and possible delivery methods of AMPs.
Collapse
Affiliation(s)
- Preethi A R
- Medical & Biological Computing Laboratory, School of Bio-Sciences & Technology, Vellore Institute of Technology, Vellore-632014, India
- Department of Biotechnology, SBST, VIT, Vellore-632014, Tamil Nadu, India
| | - Anand Anbarasu
- Medical & Biological Computing Laboratory, School of Bio-Sciences & Technology, Vellore Institute of Technology, Vellore-632014, India.
- Department of Biotechnology, SBST, VIT, Vellore-632014, Tamil Nadu, India.
| |
Collapse
|
4
|
Richter-Bisson ZW, Doktor A, Hedberg YS. Serum Albumin Aggregation Facilitated by Cobalt and Chromium Metal Ions. ACS Appl Bio Mater 2023; 6:3832-3841. [PMID: 37610418 DOI: 10.1021/acsabm.3c00463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
The interaction of serum proteins with cobalt (Co) and chromium (Cr) ions is poorly understood, but it is suspected to result in protein aggregation, which may alter the corrosion process of biomedical CoCr alloys or result in adverse health effects. Here, we study the aggregation ability and mechanism of bovine serum albumin (BSA) induced or accelerated by aqueous Co(II) and Cr(III) ions. The metal salts were selected by chemical speciation modeling, and they did not affect the pH or precipitate under simulated physiological conditions (150 mM NaCl and pH 7.3). The counterion of Cr(III) influenced the binding to BSA only at physiologically irrelevant low ionic strength. This study used a variety of spectroscopic and light scattering methods. It was determined that both metal ions and an equimolar mixture of metal ions have the potential to induce protein aggregation. Melting curves collected by circular dichroism spectroscopy indicate that Co(II) significantly reduced BSA's melting temperature when compared with Cr(III) or an equimolar mixture of Co(II) and Cr(III), both of which increased the melting temperature of BSA. The metal ions in solution preferentially interacted with BSA, resulting in the depletion of metal ions from the surrounding protein-free solution. Finally, this study suggests that the likely mechanism for Co(II)- and Cr(III)-induced BSA aggregation is salt bridging between protein molecules.
Collapse
Affiliation(s)
| | - Aleksandra Doktor
- Department of Chemistry, Western University, London, ON N6A 5B7, Canada
| | - Yolanda Susanne Hedberg
- Department of Chemistry, Western University, London, ON N6A 5B7, Canada
- Surface Science Western, Western University, London, ON N6G 0J3, Canada
- Lawson Health Research Institute, London, ON N6C2R5, Canada
| |
Collapse
|
5
|
Singla D, Bhattacharya M. Salt-Induced Dissolution of Protein Aggregates. J Phys Chem B 2022; 126:8760-8770. [PMID: 36283072 DOI: 10.1021/acs.jpcb.2c06555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Protein aggregation is mediated by a complex interplay of noncovalent interactions and is associated with a broad range of aspects from debilitating human diseases to the food industry and therapeutic biotechnology. Deciphering the intricate roles of noncovalent interactions is of paramount importance for the design of effective inhibitory and disaggregation strategies, which remains a formidable challenge. By using a combination of spectroscopic and microscopic tools, here we show that the surfactant-mediated protein aggregation can be modulated by an intriguing interplay of hydrophobic and electrostatic effects. Additionally, our results illuminate the unique role of salt as a potent disaggregation inducer that alters the protein-surfactant electrostatic interactions and triggers the dissolution of preformed protein aggregates resulting in restoring the native protein structure. This unusual salt-induced dissolution and refolding offers a unique approach to regulating the balance between protein self-assembly and disassembly and will offer a potent strategy to design electrostatically targeted inhibitors.
Collapse
Affiliation(s)
- Deepika Singla
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Thapar Technology Campus, Bhadson Road, Patiala, Punjab147004, India
| | - Mily Bhattacharya
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Thapar Technology Campus, Bhadson Road, Patiala, Punjab147004, India
| |
Collapse
|
6
|
Zhu Z, Pius Bassey A, Cao Y, Ma Y, Huang M, Yang H. Food protein aggregation and its application. Food Res Int 2022; 160:111725. [DOI: 10.1016/j.foodres.2022.111725] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/29/2022] [Accepted: 07/19/2022] [Indexed: 01/31/2023]
|
7
|
Stachurska X, Cendrowski K, Pachnowska K, Piegat A, Mijowska E, Nawrotek P. Nanoparticles Influence Lytic Phage T4-like Performance In Vitro. Int J Mol Sci 2022; 23. [PMID: 35806179 DOI: 10.3390/ijms23137179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 06/25/2022] [Accepted: 06/26/2022] [Indexed: 02/01/2023] Open
Abstract
Little is known about interactions of non-filamentous, complex-structured lytic phages and free, non-ordered nanoparticles. Emerging questions about their possible bio-sanitization co-applications or predictions of possible contact effects in the environment require testing. Therefore, we revealed the influence of various nanoparticles (NPs; SiO2, TiO2-SiO2, TiO2, Fe3O4, Fe3O4-SiO2 and SiO2-Fe3O4-TiO2) on a T4-like phage. In great detail, we investigated phage plaque-forming ability, phage lytic performance, phage progeny burst times and titers by the eclipse phase determinations. Additionally, it was proved that TEM micrographs and results of NP zeta potentials (ZP) were crucial to explain the obtained microbiological data. We propose that the mere presence of the nanoparticle charge is not sufficient for the phage to attach specifically to the NPs, consequently influencing the phage performance. The zeta potential values in the NPs are of the greatest influence. The threshold values were established at ZP < −35 (mV) for phage tail binding, and ZP > 35 (mV) for phage head binding. When NPs do not meet these requirements, phage−nanoparticle physical interaction becomes nonspecific. We also showed that NPs altered the phage lytic activity, regardless of the used NP concentration. Most of the tested nanoparticles positively influenced the phage lytic performance, except for SiO2 and Fe3O4-SiO2, with a ZP lower than −35 (mV), binding with the phage infective part—the tail.
Collapse
|
8
|
Jaiswal S, Manhas A, Pandey AK, Priya S, Sharma SK. Engineered Nanoparticle-Protein Interactions Influence Protein Structural Integrity and Biological Significance. Nanomaterials (Basel) 2022; 12:1214. [PMID: 35407332 DOI: 10.3390/nano12071214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 03/21/2022] [Accepted: 03/24/2022] [Indexed: 02/01/2023]
Abstract
Engineered nanoparticles (ENPs) are artificially synthesized particles with unique physicochemical properties. ENPs are being extensively used in several consumer items, elevating the probability of ENP exposure to biological systems. ENPs interact with various biomolecules like lipids, proteins, nucleic acids, where proteins are most susceptible. The ENP-protein interactions are mostly studied for corona formation and its effect on the bio-reactivity of ENPs, however, an in-depth understanding of subsequent interactive effects on proteins, such as alterations in their structure, conformation, free energy, and folding is still required. The present review focuses on ENP-protein interactions and the subsequent effects on protein structure and function followed by the therapeutic potential of ENPs for protein misfolding diseases.
Collapse
|
9
|
Pulingam T, Foroozandeh P, Chuah JA, Sudesh K. Exploring Various Techniques for the Chemical and Biological Synthesis of Polymeric Nanoparticles. Nanomaterials (Basel) 2022; 12:576. [PMID: 35159921 DOI: 10.3390/nano12030576] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/31/2022] [Accepted: 02/06/2022] [Indexed: 12/12/2022]
Abstract
Nanoparticles (NPs) have remarkable properties for delivering therapeutic drugs to the body’s targeted cells. NPs have shown to be significantly more efficient as drug delivery carriers than micron-sized particles, which are quickly eliminated by the immune system. Biopolymer-based polymeric nanoparticles (PNPs) are colloidal systems composed of either natural or synthetic polymers and can be synthesized by the direct polymerization of monomers (e.g., emulsion polymerization, surfactant-free emulsion polymerization, mini-emulsion polymerization, micro-emulsion polymerization, and microbial polymerization) or by the dispersion of preformed polymers (e.g., nanoprecipitation, emulsification solvent evaporation, emulsification solvent diffusion, and salting-out). The desired characteristics of NPs and their target applications are determining factors in the choice of method used for their production. This review article aims to shed light on the different methods employed for the production of PNPs and to discuss the effect of experimental parameters on the physicochemical properties of PNPs. Thus, this review highlights specific properties of PNPs that can be tailored to be employed as drug carriers, especially in hospitals for point-of-care diagnostics for targeted therapies.
Collapse
|
10
|
Garcia-Munoz RA, McConnell J, Morales V, Sanz R. Designing nanocarriers to overcome the limitations in conventional drug administration for Parkinson's disease. Neural Regen Res 2022; 17:1743-1744. [PMID: 35017428 PMCID: PMC8820718 DOI: 10.4103/1673-5374.332143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Affiliation(s)
- Rafael A Garcia-Munoz
- Department of Chemical and Environmental Technology, Rey Juan Carlos University, Madrid, Spain
| | - Joseph McConnell
- Department of Chemical & Process Engineering, University of Strathclyde, Glasgow, UK
| | - Victoria Morales
- Department of Chemical and Environmental Technology, Rey Juan Carlos University, Madrid, Spain
| | - Raul Sanz
- Department of Chemical and Environmental Technology, Rey Juan Carlos University, Madrid, Spain
| |
Collapse
|
11
|
Lizoń A, Tisończyk J, Gajewska M, Drożdż R. Silver Nanoparticles as a Tool for the Study of Spontaneous Aggregation of Immunoglobulin Monoclonal Free Light Chains. Int J Mol Sci 2021; 22:9703. [PMID: 34575867 DOI: 10.3390/ijms22189703] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/04/2021] [Accepted: 09/06/2021] [Indexed: 02/03/2023] Open
Abstract
Some misfolded proteins, e.g., immunoglobulin monoclonal free light chains (FLC), tend to form fibrils. Protein deposits in tissue may lead to amyloidosis and dysfunction of different organs. There is currently no technique allowing for the identification of FLC that are prone to aggregate. The development of such a method would enable the early selection of patients at high risk of developing amyloidosis. The aim of this study was to investigate whether silver nanoparticles (AgNPs) could be a useful tool to study the process of aggregation of FLC and their susceptibility to form the protein deposits. Mixtures of AgNPs and urine samples from patients with multiple myeloma were prepared. To evaluate the aggregation process of nanoparticles coated with proteins, UV-visible spectroscopy, transmission electron microscopy, and the original laser light scattering method were used. It has been shown that some clones of FLC spontaneously triggered aggregation of the nanoparticles, while in the presence of others, the nanoparticle solution became hyperstable. This is probably due to the structure of the chains themselves, unique protein-AgNPs interactions and perhaps correlates with the tendency of some FLC clones to form deposits. Nanoparticle technology has proven to be helpful in identifying clones of immunoglobulin FLC that tend to aggregate.
Collapse
|
12
|
Włodarczyk R, Kwarciak-kozłowska A. Nanoparticles from the Cosmetics and Medical Industries in Legal and Environmental Aspects. Sustainability 2021; 13:5805. [DOI: 10.3390/su13115805] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This paper presents the application and role of nanomaterials, with particular emphasis on the cosmetics and medical industries. Methods of obtaining materials at the nanoscale and their characteristic structure, which determines their attractiveness and risk, especially in recent years, have been described. The subject of the work was to indicate the hazards and risks that are associated with the properties of nanomaterials; dimension, and high chemical and physical activity, thus making ways to capture and monitor them difficult. Legal and environmental aspects were taken into account, and the involvement of the European Commission in this subject and the activities carried out in a few European countries as well as in Japan, the USA and Canada were analyzed.
Collapse
|
13
|
March D, Bianco V, Franzese G. Protein Unfolding and Aggregation near a Hydrophobic Interface. Polymers (Basel) 2021; 13:polym13010156. [PMID: 33401542 PMCID: PMC7795562 DOI: 10.3390/polym13010156] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 12/22/2020] [Accepted: 12/24/2020] [Indexed: 01/29/2023] Open
Abstract
The behavior of proteins near interfaces is relevant for biological and medical purposes. Previous results in bulk show that, when the protein concentration increases, the proteins unfold and, at higher concentrations, aggregate. Here, we study how the presence of a hydrophobic surface affects this course of events. To this goal, we use a coarse-grained model of proteins and study by simulations their folding and aggregation near an ideal hydrophobic surface in an aqueous environment by changing parameters such as temperature and hydrophobic strength, related, e.g., to ions concentration. We show that the hydrophobic surface, as well as the other parameters, affect both the protein unfolding and aggregation. We discuss the interpretation of these results and define future lines for further analysis, with their possible implications in neurodegenerative diseases.
Collapse
Affiliation(s)
- David March
- Secció de Física Estadística i Interdisciplinària—Departament de Física de la Matèria Condensada, Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain;
| | - Valentino Bianco
- Chemical Physics Department, Faculty of Chemistry, Universidad Complutense de Madrid, Plaza de las Ciencias, Ciudad Universitaria, 28040 Madrid, Spain
- Correspondence: (V.B.); (G.F.)
| | - Giancarlo Franzese
- Secció de Física Estadística i Interdisciplinària—Departament de Física de la Matèria Condensada, Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain;
- Correspondence: (V.B.); (G.F.)
| |
Collapse
|
14
|
|
15
|
Wang F, Li Y, Yu L, Zhu J, Zhang F, Linhardt RJ. Amphiphilic mPEG-Modified Oligo-Phenylalanine Nanoparticles Chemoenzymatically Synthesized via Papain. ACS Omega 2020; 5:30336-30347. [PMID: 33251469 PMCID: PMC7689955 DOI: 10.1021/acsomega.0c05076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 10/28/2020] [Indexed: 05/04/2023]
Abstract
Amphiphilic mPEG-modified peptide nanoparticles were developed from oligo-phenylalanine (OPhe) nanoparticles (NPs) synthesized via papain. Tyndall effects indicate that OPhe NPs are amphiphobic. Addition of protein perturbants, sodium dodecyl sulfate (SDS), and urea, in the dispersion solution of OPhe NPs can significantly reduce the R h,m value of NPs, from approximately 749.2 nm to about 200 nm. Therefore, the hydrophobic interaction and hydrogen bonding play major roles in maintaining the aggregation of OPhe NPs. Using the "grafting to" method, the methoxypolyethylene-modified OPhe NPs (mPEG-g-OPhe NPs) were synthesized and characterized by Fourier transform infrared spectroscopy (FTIR), 1H NMR, electrospray ionization mass spectrometry (ESI-MS), and dynamic light scattering (DLS). The attenuated total reflectance (ATR) spectrum of OPhe NPs and mPEG-g-OPhe NPs demonstrate that the secondary structures of these NPs are mainly β-type. mPEG-g-OPhe NPs can self-aggregate into spherical micelles both in water and cyclohexane. Increasing the chain length of the mPEG moiety, the critical micellar concentrations of mPEG-g-OPhe NPs increased in water but decreased in cyclohexane. The light stability, thermal stability, hydrolysis stability, and encapsulation stability of curcumin were significantly promoted by encapsulation in the micelles formed by mPEG-g-OPhe NPs. The protective effects regularly varied with the variations in the mPEG chain length of mPEG-g-OPhe NPs.
Collapse
Affiliation(s)
- Feng Wang
- Key
Laboratory of Synthetic and Biological Colloids, Ministry of Education, Jiangnan University, Wuxi 214122, China
- School
of Chemical and Material Engineering, Jiangnan
University, Wuxi 214122, China
| | - Youhua Li
- School
of Chemical and Material Engineering, Jiangnan
University, Wuxi 214122, China
| | - Lu Yu
- School
of Chemical and Material Engineering, Jiangnan
University, Wuxi 214122, China
| | - Jinwen Zhu
- School
of Chemical and Material Engineering, Jiangnan
University, Wuxi 214122, China
| | - Fuming Zhang
- Department
of Chemistry and Chemical Biology, Departments of Chemical and Biological
Engineering, Biology and Biomedical Engineering, Center for Biotechnology
and Interdisciplinary Studies, Rensselaer
Polytechnic Institute, Troy, New York 12180, United States
| | - Robert J. Linhardt
- Department
of Chemistry and Chemical Biology, Departments of Chemical and Biological
Engineering, Biology and Biomedical Engineering, Center for Biotechnology
and Interdisciplinary Studies, Rensselaer
Polytechnic Institute, Troy, New York 12180, United States
| |
Collapse
|
16
|
Gupta P, Verma R, Verma AK, Chattopadhyay PC. A versatile tool in controlling aggregation and Ag nanoparticles assisted in vitro folding of thermally denatured zDHFR. Biochem Biophys Rep 2020; 24:100856. [PMID: 33294634 PMCID: PMC7695922 DOI: 10.1016/j.bbrep.2020.100856] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 11/03/2020] [Accepted: 11/03/2020] [Indexed: 11/19/2022] Open
Abstract
Background Proteins have tendency to form inactive aggregates at higher temperatures due to thermal instability. Maintenance of thermal stability is essential to gain the protein in sufficient quantity and biologically active form during their commercial production. Methods BL21-DE3 Rosetta E. coli cells which contains plasmid pET43.1a vector was used for producing zDHFR protein commercially. The purification of N-terminal Histidine tagged zDHFR was performed by Immobilized Metal Ion chromatography (IMAC). Investigations were performed in existence and non existence of Silver nanoparticles (AgNPs). The inactivation kinetics of zDHFR in existence and non existence of AgNPs were monitored over a range of 40–80 °C as monitored by UV–Visible absorption spectroscopy. Results The protein completely lost its activity at 55 °C. Kinetics of inactivated zDHFR follows first order model in presence and absence of AgNPs. Decrease in rate constant (k) values at respective temperatures depicts that AgNPs contribute in the thermostability of the protein. AgNPs also assists in regaining the activity of zDHFR protein. Conclusions AgNPs helps in maintaining thermostability and reducing the aggregation propensity of zDHFR protein. General significance Result explains that AgNPs are recommended as a valuable system in enhancing the industrial production of biologically active zDHFR protein which is an important component in folate cycle and essential for survival of cells and prevents the protein from being aggregated. Recombinant proteins have the ability to get aggregated during their commercial production due to factors like temperature, pH, etc. Aggregation of protein can be prevented with the help of AgNPs by increasing their thermal stability. AgNPs maintain the stability of thermally-denatured zDHFR under high temperatures which is confirmed by kinetic and thermodynamic parameters. AgNPs also assists in refolding of the thermally-denatured protein which proves that AgNPs plays a supportive role in maintaining the stability of the protein and thus preventing it from being aggregated.
Collapse
Affiliation(s)
- Preeti Gupta
- Molecular Biophysics Lab, Amity Institute of Biotechnology, Amity University, Sector 125, Noida, Uttar Pradesh, 201313, India
| | - Ritu Verma
- Molecular Biophysics Lab, Amity Institute of Biotechnology, Amity University, Sector 125, Noida, Uttar Pradesh, 201313, India
| | - Anita Kamra Verma
- Department of Zoology, Kirori Mal College, University of Delhi, New Delhi, 110007, India
| | - Pratima Chaudhuri Chattopadhyay
- Molecular Biophysics Lab, Amity Institute of Biotechnology, Amity University, Sector 125, Noida, Uttar Pradesh, 201313, India
- Corresponding author.
| |
Collapse
|
17
|
Mahapatra A, Sarkar S, Biswas SC, Chattopadhyay K. Modulation of α-Synuclein Fibrillation by Ultrasmall and Biocompatible Gold Nanoclusters. ACS Chem Neurosci 2020; 11:3442-3454. [PMID: 33044818 DOI: 10.1021/acschemneuro.0c00550] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Parkinson's disease (PD) is the second most common neurodegenerative disorder, the pathogenesis of which is closely linked to the misfolding and aggregation of the neuronal protein α-Synuclein (A-Syn). Numerous molecules that inhibit/modulate the pathogenic aggregation of A-Syn in an effort to tackle PD pathogenesis have been reported, but none so far have been successful in treating the disease at the clinic. One major reason for this is the poor blood-brain barrier (BBB) permeability of most of the molecules being used. Therefore, using BBB-permeable (and biocompatible) nanomaterials as fibrillation modulators is gaining importance. In the present work, we show how nontoxic and ultrasmall gold nanoclusters (AuNCs) can systematically modulate the pathogenic fibrillation of A-Syn in vitro, based on the chemical nature of their capping agents, using two reported easily synthesizable AuNCs as models. In addition, we detect the BBB permeability in mice of one of these AuNCs solely by making use of its intrinsic fluorescence. Thus, our work exemplifies how AuNCs can be potential therapeutics against PD; while also acting as fluorescent probes for their own BBB permeability.
Collapse
Affiliation(s)
- Anindita Mahapatra
- Structural Biology and Bio-informatics Division, Indian Institute of Chemical Biology, Kolkata-700032, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Sukanya Sarkar
- Cell Biology and Physiology Division, Indian Institute of Chemical Biology, Kolkata-700032, India
| | - Subhas Chandra Biswas
- Cell Biology and Physiology Division, Indian Institute of Chemical Biology, Kolkata-700032, India
| | - Krishnananda Chattopadhyay
- Structural Biology and Bio-informatics Division, Indian Institute of Chemical Biology, Kolkata-700032, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| |
Collapse
|
18
|
Naranjo E, Merfa MV, Santra S, Ozcan A, Johnson E, Cobine PA, De La Fuente L. Zinkicide Is a ZnO-Based Nanoformulation with Bactericidal Activity against Liberibacter crescens in Batch Cultures and in Microfluidic Chambers Simulating Plant Vascular Systems. Appl Environ Microbiol 2020; 86:e00788-20. [PMID: 32561578 PMCID: PMC7414956 DOI: 10.1128/aem.00788-20] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 06/12/2020] [Indexed: 01/09/2023] Open
Abstract
Phloem-limited bacterial "Candidatus Liberibacter" species are associated with incurable plant diseases worldwide. Antimicrobial treatments for these pathogens are challenging due to the difficulty of reaching the vascular tissue they occupy at bactericidal concentrations. Here, in vitro antimicrobial mechanisms of Zinkicide TMN110 (ZnK), a nonphytotoxic zinc oxide (ZnO)-based nanoformulation, were compared to those of bulk ZnO (b-ZnO) using as a model the only culturable species of the genus, Liberibacter crescens Minimum bactericidal concentration (MBC) determination and time-kill assays showed that ZnK has a bactericidal effect against L. crescens, whereas b-ZnO is bacteriostatic. When ZnK was used at the MBC (150 ppm), its antimicrobial mechanisms included an increase in Zn solubility, generation of intracellular reactive oxygen species, lipid peroxidation, and cell membrane disruption; all of these were of greater intensity than those of b-ZnO. Inhibition of biofilms, which are important during insect vector colonization, was stronger by ZnK than by b-ZnO at concentrations between 2.5 and 10 ppm in batch cultures; however, neither ZnK nor b-ZnO removed L. crescens preformed biofilms when applied between 100 and 400 ppm. In microfluidic chambers simulating source-to-sink phloem movement, ZnK significantly outperformed b-ZnO in Zn mobilization and bactericidal activity against L. crescens planktonic cells in sink reservoirs. In microfluidic chamber assays assessing antibiofilm activity, ZnK displayed a significantly enhanced bactericidal activity against L. crescens individual attached cells as well as preformed biofilms compared to that of b-ZnO. The superior mobility and antimicrobial activity of ZnK in microenvironments make this formulation a promising product to control plant diseases caused by "Candidatus Liberibacter" species and other plant vascular pathogens.IMPORTANCE "Candidatus Liberibacter" species are associated with incurable plant diseases that have caused billions of dollars of losses for United States and world agriculture. Chemical control of these pathogens is complicated, because their life cycle combines intracellular vascular stages in plant hosts with transmission by highly mobile insect vectors. To date, "Candidatus Liberibacter" species are mostly unculturable, except for Liberibacter crescens, a member of the genus that has been used as a model for in vitro assays. Here, we evaluated the potential of Zinkicide (ZnK) as an antimicrobial against "Candidatus Liberibacter" species in batch cultures and under flow conditions, using L. crescens as a biological model. ZnK displayed bactericidal activity against L. crescens in batch cultures and showed increased mobility and bactericidal activity in microfluidic devices resembling "Candidatus Liberibacter" species natural habitats. ZnK performance observed here against L. crescens makes this compound a promising candidate to control plant diseases caused by vascular pathogens.
Collapse
Affiliation(s)
- Eber Naranjo
- Department of Entomology and Plant Pathology, Auburn University, Auburn, Alabama, USA
| | - Marcus V Merfa
- Department of Entomology and Plant Pathology, Auburn University, Auburn, Alabama, USA
| | - Swadeshmukul Santra
- NanoScience Technology Center, University of Central Florida, Orlando, Florida, USA
- Department of Chemistry, University of Central Florida, Orlando, Florida, USA
- Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, Florida, USA
| | - Ali Ozcan
- NanoScience Technology Center, University of Central Florida, Orlando, Florida, USA
- Department of Chemistry, University of Central Florida, Orlando, Florida, USA
- Vocational School of Technical Sciences, Karamanoglu Mehmetbey University, Karaman, Turkey
| | - Evan Johnson
- Citrus Research and Education Center, University of Florida, Lake Alfred, Florida, USA
| | - Paul A Cobine
- Department of Biological Sciences, Auburn University, Auburn, Alabama, USA
| | - Leonardo De La Fuente
- Department of Entomology and Plant Pathology, Auburn University, Auburn, Alabama, USA
| |
Collapse
|
19
|
Fernandes M, Lopes I, Teixeira J, Botelho C, Gomes AC. Exosome-like Nanoparticles: A New Type of Nanocarrier. Curr Med Chem 2020; 27:3888-3905. [PMID: 30706777 DOI: 10.2174/0929867326666190129142604] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 11/23/2018] [Accepted: 01/17/2019] [Indexed: 12/12/2022]
Abstract
Nanoparticles are one of the most commonly used systems for imaging or therapeutic drug delivery. Exosomes are nanovesicular carriers that transport cargo for intercellular communication. These nanovesicles are linked to the pathology of some major diseases, in some cases with a central role in their progression. The use of these carriers to transport therapeutic drugs is a recent and promising approach to treat diseases such as cancer and Alzheimer disease. The physiological production of these structures is limited impairing its collection and subsequent purification. These drawbacks inspired the search for mimetic alternatives. The collection of exosome-like nanoparticles from plants can be a good alternative, since they are easier to extract and do not have the drawbacks of those produced in animal cells. Both natural and synthetic exosome-like nanoparticles, produced from serial extrusion of cells or by bottom up synthesis, are currently some of the most promising, biocompatible, high efficiency systems for drug delivery.
Collapse
Affiliation(s)
- Mário Fernandes
- Centre of Biological Engineering (CEB), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.,Centre of Molecular and Environmental Biology (CBMA), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Ivo Lopes
- Centre of Biological Engineering (CEB), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.,Centre of Molecular and Environmental Biology (CBMA), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - José Teixeira
- Centre of Biological Engineering (CEB), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Cláudia Botelho
- Centre of Biological Engineering (CEB), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.,Centre of Molecular and Environmental Biology (CBMA), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Andreia C Gomes
- Centre of Molecular and Environmental Biology (CBMA), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| |
Collapse
|
20
|
Gondim BLC, da Silva Catarino J, de Sousa MAD, de Oliveira Silva M, Lemes MR, de Carvalho-Costa TM, de Lima Nascimento TR, Machado JR, Rodrigues V, Oliveira CJF, Cançado Castellano LR, da Silva MV. Nanoparticle-Mediated Drug Delivery: Blood-Brain Barrier as the Main Obstacle to Treating Infectious Diseases in CNS. Curr Pharm Des 2020; 25:3983-3996. [PMID: 31612822 DOI: 10.2174/1381612825666191014171354] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 09/19/2019] [Indexed: 12/25/2022]
Abstract
BACKGROUND Parasitic infections affecting the central nervous system (CNS) present high morbidity and mortality rates and affect millions of people worldwide. The most important parasites affecting the CNS are protozoans (Plasmodium sp., Toxoplasma gondii, Trypanosoma brucei), cestodes (Taenia solium) and free-living amoebae (Acantamoeba spp., Balamuthia mandrillaris and Naegleria fowleri). Current therapeutic regimens include the use of traditional chemicals or natural compounds that have very limited access to the CNS, despite their elevated toxicity to the host. Improvements are needed in drug administration and formulations to treat these infections and to allow the drug to cross the blood-brain barrier (BBB). METHODS This work aims to elucidate the recent advancements in the use of nanoparticles as nanoscaled drug delivery systems (NDDS) for treating and controlling the parasitic infections that affect the CNS, addressing not only the nature and composition of the polymer chosen, but also the mechanisms by which these nanoparticles may cross the BBB and reach the infected tissue. RESULTS There is a strong evidence in the literature demonstrating the potential usefulness of polymeric nanoparticles as functional carriers of drugs to the CNS. Some of them demonstrated the mechanisms by which drugloaded nanoparticles access the CNS and control the infection by using in vivo models, while others only describe the pharmacological ability of these particles to be utilized in in vitro environments. CONCLUSION The scarcity of the studies trying to elucidate the compatibility as well as the exact mechanisms by which NDDS might be entering the CNS infected by parasites reveals new possibilities for further exploratory projects. There is an urgent need for new investments and motivations for applying nanotechnology to control parasitic infectious diseases worldwide.
Collapse
Affiliation(s)
- Brenna Louise Cavalcanti Gondim
- Human Immunology Research and Education Group-GEPIH, Technical School of Health, Federal University of Paraiba, Joao Pessoa, Paraiba, Brazil.,Post-Graduation Program in Dentistry, Department of Dentistry, State University of Paraíba, Campina Grande, Paraíba, Brazil
| | - Jonatas da Silva Catarino
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba, Minas Gerais, Brazil
| | | | - Mariana de Oliveira Silva
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Marcela Rezende Lemes
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba, Minas Gerais, Brazil
| | | | - Tatiana Rita de Lima Nascimento
- Human Immunology Research and Education Group-GEPIH, Technical School of Health, Federal University of Paraiba, Joao Pessoa, Paraiba, Brazil
| | - Juliana Reis Machado
- Department of Pathology, Genetics and Evolution, Federal University of Triangulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Virmondes Rodrigues
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Carlo José Freire Oliveira
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Lúcio Roberto Cançado Castellano
- Human Immunology Research and Education Group-GEPIH, Technical School of Health, Federal University of Paraiba, Joao Pessoa, Paraiba, Brazil
| | - Marcos Vinicius da Silva
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba, Minas Gerais, Brazil
| |
Collapse
|
21
|
Giannousi K, Geromichalos G, Kakolyri D, Mourdikoudis S, Dendrinou-Samara C. Interaction of ZnO Nanostructures with Proteins: In Vitro Fibrillation/Antifibrillation Studies and in Silico Molecular Docking Simulations. ACS Chem Neurosci 2020; 11:436-444. [PMID: 31904211 DOI: 10.1021/acschemneuro.9b00642] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Protein amyloidosis is related to many neurological disorders. Nanoparticles (NPs) due to their small size can regulate both the polypeptide monomers/oligomers assembly into amyloid fibrils/plaques and the disintegration of the existent plaques. Herein, we have synthesized ZnO nanoflowers and polyol-coated ZnO NPs of relatively small size (40 nm) with cylindrical shape, through solvothermal and microwave-assisted routes, respectively. The effect of the different morphology of nanostructures on the fibrillation/antifibrillation process was monitored in bovine serum albumin (BSA) and human insulin (HI) by fluorescence Thioflavin T (ThT) measurements. Although both nanomaterials affected the amyloid formation mechanism as well as their disaggregation, ZnO nanoflowers with their sharp edges exhibited the greatest amyloid degradation rate in both model proteins (73% and 35%, respectively) and inhibited the most the insulin fibril growth, while restrained also the fibrillation process in the case of albumin solution. In silico molecular docking simulations on the crystal structure of BSA and HI were performed to analyze further the observed in vitro activity of ZnO nanostructures. The binding energy of ZnO NPs was found lower for BSA (-5.44), highlighting their ability to act as catalysts in the fibrillation process of albumin monomers.
Collapse
Affiliation(s)
- Kleoniki Giannousi
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - George Geromichalos
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Dionysia Kakolyri
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Stefanos Mourdikoudis
- UCL Healthcare Biomagnetic and Nanomaterials Laboratories, 21 Albemarle Street, London W1S 4BS, United Kingdom
- Biophysics Group, Department of Physics and Astronomy, University College London (UCL), London WC1E 6BT, United Kingdom
| | - Catherine Dendrinou-Samara
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| |
Collapse
|
22
|
Goryunov A, Rozhkov S, Rozhkova N. Fatty acid transfer between serum albumins and shungite carbon nanoparticles and its effect on protein aggregation and association. Eur Biophys J 2019; 49:85-94. [PMID: 31865396 DOI: 10.1007/s00249-019-01414-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 07/10/2019] [Accepted: 12/08/2019] [Indexed: 10/25/2022]
Abstract
The bioactivity of the natural ultrafine carbon form shungite nanocarbon (ShC) is of particular interest both for biomedical applications of such nanomaterials and their negative impact on the aquatic environmental. Here we studied the interaction of serum albumin (SA) with ShC nanoparticles in aqueous dispersion with respect to its structural-dynamic, thermodynamic, and hydrodynamic effects. Electron spin resonance (EPR) with a 5-DOXYL-stearic acid spin probe (5DSA) demonstrates that ShC can affect fatty acid (FA) binding by SA, protein conformation in the stearic FA spin probe binding region, and protein aggregation due to the partial transfer of FA to the ShC nanoparticles. The ratio of SA fractions changes in the presence of ShC in favor of the fraction that is less saturated with FA as shown by differential scanning calorimetry (DSC). The stability of interaction with ShC is significantly higher for aggregates of SA molecules that carry physiological amounts of FA, compared to aggregates of the FA-free protein, as studied by dynamic light scattering (DLS) analysis. Generally, the mixed dispersion of SA and ShC nanoparticles is more homogeneous than the SA solution alone. This is manifested both in the size of the molecular associates and in the microenvironment of the protein-bound FA. The formation of the SA-ShC interface is likely to result in a greater uniformity of the FA binding sites and a decrease in protein fractions and "hot patches" on the protein surface responsible for the supramolecular heterogeneity of the protein in solution.
Collapse
Affiliation(s)
- Andrey Goryunov
- Institute of Biology, Karelian Research Center RAS, Pushkinskaya 11, 185910, Petrozavodsk, Russia
| | - Sergei Rozhkov
- Institute of Biology, Karelian Research Center RAS, Pushkinskaya 11, 185910, Petrozavodsk, Russia.
| | - Natalia Rozhkova
- Institute of Geology, Karelian Research Center RAS, Pushkinskaya 11, 185910, Petrozavodsk, Russia
| |
Collapse
|
23
|
Rao TN, Riyazuddin, Babji P, Ahmad N, Khan RA, Hassan I, Shahzad SA, Husain FM. Green synthesis and structural classification of Acacia nilotica mediated-silver doped titanium oxide (Ag/TiO 2) spherical nanoparticles: Assessment of its antimicrobial and anticancer activity. Saudi J Biol Sci 2019; 26:1385-1391. [PMID: 31866742 PMCID: PMC6904800 DOI: 10.1016/j.sjbs.2019.09.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 09/04/2019] [Accepted: 09/04/2019] [Indexed: 11/25/2022] Open
Abstract
Current exanimation reports, green fabrication of silver doped TiO2 nanoparticles (Ag/TiO2) using aqueous extract of Acacia nilotica as bio-reductant and assess its potential as antimicrobial and anticancer agent. The obtained spherical Ag/TiO2 were characterized by various analytical techniques including FTIR, (XRD), (FE-SEM EDS), and (TEM). Synthesized Ag/TiO2 demonstrated broad spectrum antibacterial and anticandidal activity. The order of antimicrobial activity was found to be E. coli > C. albicans > MRSA > P. aeruginosa. In addition, cytotoxicity and oxidative stress of Ag/TiO2 nanoparticles in (MCF-7) cells was also investigated. Outcomes of MTT assay showed concentration dependent reduction in cell viability. Further, synthesized NPs reduced the level of glutathione, induced ROS generation and lipid peroxidation in the treated cells. Therefore, it is envisaged that these spherical nanoparticles may be exploited in drug delivery, pharmaceutical, and food industry.
Collapse
Affiliation(s)
- Tentu Nageswara Rao
- Department of School of Material Science and Engineering, Changwon University, South Korea
| | - Riyazuddin
- Department of School of Material Science and Engineering, Changwon University, South Korea
| | - P. Babji
- Department of Physical, Nuclear Chemistry & Chemical Oceanography, Andhra University, India
| | - Naushad Ahmad
- Department of Chemistry, King Saud University, Riyadh, Saudi Arabia
| | - Rais Ahmad Khan
- Department of Chemistry, King Saud University, Riyadh, Saudi Arabia
| | - Iftekhar Hassan
- Department of Zoology, King Saud University, Riyadh, Saudi Arabia
| | - Syed Ali Shahzad
- Department of Food Science and Nutrition, King Saud University, Riyadh, Saudi Arabia
| | - Fohad Mabood Husain
- Department of Food Science and Nutrition, King Saud University, Riyadh, Saudi Arabia
| |
Collapse
|
24
|
Kniec K, Ledwa K, Marciniak L. Enhancing the Relative Sensitivity of V 5+, V 4+ and V 3+ Based Luminescent Thermometer by the Optimization of the Stoichiometry of Y 3Al 5-xGa xO 12 Nanocrystals. Nanomaterials (Basel) 2019; 9:nano9101375. [PMID: 31557921 PMCID: PMC6836024 DOI: 10.3390/nano9101375] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 09/09/2019] [Accepted: 09/24/2019] [Indexed: 01/03/2023]
Abstract
In this work the influence of the Ga3+ concentration on the luminescent properties and the abilities of the Y3Al5−xGaxO12: V nanocrystals to noncontact temperature sensing were investigated. It was shown that the increase of the Ga3+ amount enables enhancement of V4+ emission intensity in respect to the V3+ and V5+ and thus modify the color of emission. The introduction of Ga3+ ions provides the appearance of the crystallographic sites, suitable for V4+ occupation. Consequently, the increase of V4+ amount facilitates V5+ → V4+ interionic energy transfer throughout the shortening of the distance between interacting ions. The opposite thermal dependence of V4+ and V5+ emission intensities enables to create the bandshape luminescent thermometr of the highest relative sensitivity of V-based luminescent thermometers reported up to date (Smax, 2.64%/°C, for Y3Al2Ga3O12 at 0 °C). An approach of tuning the performance of Y3Al5−xGaxO12: V nanocrystals to luminescent temperature sensing, including the spectral response, maximal relative sensitivity and usable temperature range, by the Ga3+ doping was presented and discussed.
Collapse
Affiliation(s)
- Karolina Kniec
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland.
| | - Karolina Ledwa
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland.
| | - Lukasz Marciniak
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland.
| |
Collapse
|
25
|
Giannousi K, Antonoglou O, Dendrinou-Samara C. Interplay between Amyloid Fibrillation Delay and Degradation by Magnetic Zinc-Doped Ferrite Nanoparticles. ACS Chem Neurosci 2019; 10:3796-3804. [PMID: 31298846 DOI: 10.1021/acschemneuro.9b00292] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Amyloidosis, the aggregation of naturally soluble proteins into fibrils, is the main pathological hallmark of central nervous system (CNS) disorders, and new therapeutic approaches can be introduced through nanotechnology. Herein, magnetic nanoparticles (MNPs) are proposed to combat amyloidosis and act as CNS theranostic (therapy and diagnosis) candidates through magnetomechanical forces that can be induced under a low-frequency magnetic field. In that vein, a modified one-step microwave-assisted polyol process has been employed to synthesize hybrid organic/inorganic zinc ferrite (ZnxFe3-xO4) MNPs with different levels of zinc doping (0.30 < x < 0.6) derived from the utilized polyol. The lowest doped (x = 0.30) MNPs exhibited high magnetization (127 emu/g), high T2 imaging ability (r2 = 432 mM-1 s-1), and relatively small hydrodynamic size (180 nm), decisive characteristics to further evaluate their CNS theranostic potential. Their effect on the fibrillation/degradation was monitored in two model proteins, insulin and albumin, in the presence/absence of variant external magnetic fields (static, rotating, or alternating) via Thioflavin T (ThT) fluorescence assay and optical fluorescence microscopy. The MNPs were injected either in oligomer solution where significant fibrillation delay was observed, boosted by zinc ionic leaching of MNPs, or in already formed amyloid plaques where up to 86% amyloid degradation was recorded in the presence of magnetic fields, unveiling magnetomechanical antifibrillation properties. The alternating magnetic field (4 Hz) allows the bouncing of the MNPs into the amyloid net driven by the magnetic forces, and thus is featured as the preferred "dancing mode", which strengthens the degrading efficacy of MNPs.
Collapse
Affiliation(s)
- Kleoniki Giannousi
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, 54124 Greece
| | - Orestis Antonoglou
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, 54124 Greece
| | - Catherine Dendrinou-Samara
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, 54124 Greece
| |
Collapse
|
26
|
Sonawane SK, Ahmad A, Chinnathambi S. Protein-Capped Metal Nanoparticles Inhibit Tau Aggregation in Alzheimer's Disease. ACS Omega 2019; 4:12833-12840. [PMID: 31460408 PMCID: PMC6682074 DOI: 10.1021/acsomega.9b01411] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 06/24/2019] [Indexed: 05/24/2023]
Abstract
The Alzheimer's disease (AD) therapeutic research is yielding a large number of potent molecules. The nanoparticle-based therapeutics against the protein aggregation in AD is also taking a lead especially with amyloid-β as a primary target. In this work, we have screened for the first time protein-capped (PC) metal nanoparticles for their potency in inhibiting Tau aggregation in vitro. We present a novel function of PC-Fe3O4 and PC-CdS nanoparticles as potent Tau aggregation inhibitors by fluorescence spectrometry, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and electron microscopy. We demonstrate that the biologically synthesized PC-metal nanoparticles, especially iron oxide do not affect the viability of neuroblastoma cells. Moreover, PC-CdS nanoparticles show dual properties of inhibition and disaggregation of Tau. Thus, the nanoparticles can take a lead as potent Tau aggregation inhibitors and can be modified for specific drug delivery due to their very small size. The current work presents unprecedented strategy to design anti-Tau aggregation drugs, which provides interesting insights to understand the role of biological nanostructures in Alzheimer's disease.
Collapse
Affiliation(s)
- Shweta Kishor Sonawane
- Neurobiology Group,
Division of Biochemical Sciences, CSIR-National
Chemical Laboratory, Dr. Homi Bhabha Road, 411008 Pune, India
- Academy of Scientific
and Innovative Research (AcSIR), 411008 Pune, India
| | - Absar Ahmad
- Neurobiology Group,
Division of Biochemical Sciences, CSIR-National
Chemical Laboratory, Dr. Homi Bhabha Road, 411008 Pune, India
| | - Subashchandrabose Chinnathambi
- Neurobiology Group,
Division of Biochemical Sciences, CSIR-National
Chemical Laboratory, Dr. Homi Bhabha Road, 411008 Pune, India
- Academy of Scientific
and Innovative Research (AcSIR), 411008 Pune, India
| |
Collapse
|
27
|
Abstract
The molecular structure of a protein could be altered when it is attached to nanoparticles (NPs), affecting the performance of NPs present in biological systems. Limited proteolysis coupled with LC-MS/MS could reveal the changes in protein structure when it binds to a variety of entities, including macro-molecules and small drugs, but it has not yet been applied to study protein-NP interaction. Herein, adsorption of proteins, transferrin, and catalase on the polystyrene (PS) or iron oxide (IO) NPs was analyzed with this method. Both increased and decreased proteolytic efficiency in certain regions on the proteins were observed. Identification of the peptides affected by protein-NP interaction led to proper prediction of alterations to protein function as well as to colloidal stability of NPs. Overall, the present work has demonstrated the utility of limited proteolysis in helping to elucidate the potential biological outcomes of the protein-NP conjugate, obtaining knowledge to guide improvement of the rational design of the protein-conjugated NPs for biomedical applications and to understand the biological behaviors of the engineered NPs.
Collapse
Affiliation(s)
- Yaokai Duan
- Department of Chemistry, University of California, Riverside, California 92507, United States
| | - Yang Liu
- Environmental Toxicology Graduate Program, University of California, Riverside, California 92507, United States
| | - Roxana Coreas
- Environmental Toxicology Graduate Program, University of California, Riverside, California 92507, United States
| | - Wenwan Zhong
- Department of Chemistry, University of California, Riverside, California 92507, United States
- Environmental Toxicology Graduate Program, University of California, Riverside, California 92507, United States
| |
Collapse
|
28
|
Konar M, Mathew A, Dasgupta S. Effect of Silica Nanoparticles on the Amyloid Fibrillation of Lysozyme. ACS Omega 2019; 4:1015-1026. [PMID: 31459377 PMCID: PMC6648903 DOI: 10.1021/acsomega.8b03169] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 12/28/2018] [Indexed: 05/18/2023]
Abstract
Protein fibrils are regarded as undesired products as these are associated with numerous neuro- and non-neurodegenerative disorders. Increasing evidence suggests that the mechanism of fibrillation involves the formation of various oligomeric intermediates, which are known to be more toxic than mature fibrils. Here, we report the impact of synthesized silica nanoparticles (SiNPs) of diameters ∼52 nm on the aggregation behavior of hen egg white lysozyme (HEWL) under heat and acidic conditions. Congo red as well as ThT binding assays and AFM imaging studies indicate that SiNPs trigger the amyloid formation of HEWL in a dose-dependent manner. ThT kinetic studies and FTIR studies suggest that the fibrillation kinetics does not involve the formation of toxic oligomeric intermediates at higher concentrations of SiNPs. By measuring fluorescence lifetime values of the bound ThT, SiNP-induced fibrillation of HEWL can easily be realized. CD spectroscopic studies indicate that native HEWL becomes unfolded upon incubation under the experimental conditions and is rapidly converted into the β-sheet-rich fibrillar aggregates in the presence of SiNPs with increasing concentrations. It has been further revealed that fibrillar aggregates formed at higher concentrations of SiNPs preferably adopt an antiparallel β-sheet configuration. The enhanced fibrillation in the presence of SiNPs is likely because of preferential adsorption of the non-amyloidogenic regions of HEWL, resulting in the exposure of the aggregation-prone regions of HEWL toward the solvent. The study will provide deeper insights into the evolution of oligomer-free fibrillation that can be useful to demonstrate the underlying mechanism of amyloid fibrillation.
Collapse
|
29
|
Mo Y, Brahmachari S, Lei J, Gilead S, Tang Y, Gazit E, Wei G. The Inhibitory Effect of Hydroxylated Carbon Nanotubes on the Aggregation of Human Islet Amyloid Polypeptide Revealed by a Combined Computational and Experimental Study. ACS Chem Neurosci 2018; 9:2741-2752. [PMID: 29986579 DOI: 10.1021/acschemneuro.8b00166] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Fibrillar deposits formed by the aggregation of the human islet amyloid polypeptide (hIAPP) are the major pathological hallmark of type 2 diabetes mellitus (T2DM). Inhibiting the aggregation of hIAPP is considered the primary therapeutic strategy for the treatment of T2DM. Hydroxylated carbon nanoparticles have received great attention in impeding amyloid protein fibrillation owing to their reduced cytotoxicity compared to the pristine ones. In this study, we investigated the influence of hydroxylated single-walled carbon nanotubes (SWCNT-OHs) on the first step of hIAPP aggregation: dimerization by performing explicit solvent replica exchange molecular dynamics (REMD) simulations. Extensive REMD simulations demonstrate that SWCNT-OHs can dramatically inhibit interpeptide β-sheet formation and completely suppress the previously reported β-hairpin amyloidogenic precursor of hIAPP. On the basis of our simulation results, we proposed that SWCNT-OH can hinder hIAPP fibrillation. This was further confirmed by our systematic turbidity measurements, thioflavin T fluorescence, circular dichroism (CD), transmission electron microscope (TEM), and atomic force microscopy (AFM) experiments. Detailed analyses of hIAPP-SWCNT-OH interactions reveal that hydrogen bonding, van der Waals, and π-stacking interactions between hIAPP and SWCNT-OH significantly weaken the inter- and intrapeptide interactions that are crucial for β-sheet formation. Our collective computational and experimental data reveal not only the inhibitory effect but also the inhibitory mechanism of SWCNT-OH against hIAPP aggregation, thus providing new clues for the development of future drug candidates against T2DM.
Collapse
Affiliation(s)
- Yuxiang Mo
- State Key Laboratory of Surface Physics, Key Laboratory for Computational Physical Science (Ministry of Education), Collaborative Innovation Center of Advanced Microstructures, and Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China
- College of Physical Science and Technology, Guangxi Normal University, 15 Yucai Road, Guilin 541004, People’s Republic of China
| | - Sayanti Brahmachari
- Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Jiangtao Lei
- State Key Laboratory of Surface Physics, Key Laboratory for Computational Physical Science (Ministry of Education), Collaborative Innovation Center of Advanced Microstructures, and Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China
| | - Sharon Gilead
- Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Yiming Tang
- State Key Laboratory of Surface Physics, Key Laboratory for Computational Physical Science (Ministry of Education), Collaborative Innovation Center of Advanced Microstructures, and Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China
| | - Ehud Gazit
- Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Guanghong Wei
- State Key Laboratory of Surface Physics, Key Laboratory for Computational Physical Science (Ministry of Education), Collaborative Innovation Center of Advanced Microstructures, and Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China
| |
Collapse
|
30
|
Karthivashan G, Ganesan P, Park SY, Kim JS, Choi DK. Therapeutic strategies and nano-drug delivery applications in management of ageing Alzheimer's disease. Drug Deliv 2018; 25:307-320. [PMID: 29350055 PMCID: PMC6058502 DOI: 10.1080/10717544.2018.1428243] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 01/11/2018] [Indexed: 01/21/2023] Open
Abstract
In recent years, the incidental rate of neurodegenerative disorders has increased proportionately with the aging population. Alzheimer's disease (AD) is one of the most commonly reported neurodegenerative disorders, and it is estimated to increase by roughly 30% among the aged population. In spite of screening numerous drug candidates against various molecular targets of AD, only a few candidates - such as acetylcholinesterase inhibitors are currently utilized as an effective clinical therapy. However, targeted drug delivery of these drugs to the central nervous system (CNS) exhibits several limitations including meager solubility, low bioavailability, and reduced efficiency due to the impediments of the blood-brain barrier (BBB). Current advances in nanotechnology present opportunities to overcome such limitations in delivering active drug candidates. Nanodrug delivery systems are promising in targeting several therapeutic moieties by easing the penetration of drug molecules across the CNS and improving their bioavailability. Recently, a wide range of nano-carriers, such as polymers, emulsions, lipo-carriers, solid lipid carriers, carbon nanotubes, metal based carriers etc., have been adapted to develop successful therapeutics with sustained release and improved efficacy. Here, we discuss few recently updated nano-drug delivery applications that have been adapted in the field of AD therapeutics, and future prospects on potential molecular targets for nano-drug delivery systems.
Collapse
Affiliation(s)
- Govindarajan Karthivashan
- Department of Biotechnology, College of Biomedical and Health Science, Research Institute of Inflammatory Diseases Konkuk University, Chungju, Republic of Korea
| | - Palanivel Ganesan
- Department of Biotechnology, College of Biomedical and Health Science, Research Institute of Inflammatory Diseases Konkuk University, Chungju, Republic of Korea
- Nanotechnology research center, College of Biomedical and Health Science, Konkuk University, Chungju, Republic of Korea
| | - Shin-Young Park
- Department of Applied Life Science, Graduate school of Konkuk University, Chungju, Republic of Korea
| | - Joon-Soo Kim
- Department of Applied Life Science, Graduate school of Konkuk University, Chungju, Republic of Korea
| | - Dong-Kug Choi
- Department of Biotechnology, College of Biomedical and Health Science, Research Institute of Inflammatory Diseases Konkuk University, Chungju, Republic of Korea
- Department of Applied Life Science, Graduate school of Konkuk University, Chungju, Republic of Korea
| |
Collapse
|
31
|
Pansieri J, Gerstenmayer M, Lux F, Mériaux S, Tillement O, Forge V, Larrat B, Marquette C. Magnetic Nanoparticles Applications for Amyloidosis Study and Detection: A Review. Nanomaterials (Basel) 2018; 8:E740. [PMID: 30231587 DOI: 10.3390/nano8090740] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 09/14/2018] [Accepted: 09/16/2018] [Indexed: 12/27/2022]
Abstract
Magnetic nanoparticles (MNPs) have great potential in biomedical and clinical applications because of their many unique properties. This contribution provides an overview of the MNPs mainly used in the field of amyloid diseases. The first part discusses their use in understanding the amyloid mechanisms of fibrillation, with emphasis on their ability to control aggregation of amyloidogenic proteins. The second part deals with the functionalization by various moieties of numerous MNPs’ surfaces (molecules, peptides, antibody fragments, or whole antibodies of MNPs) for the detection and the quantification of amyloid aggregates. The last part of this review focuses on the use of MNPs for magnetic-resonance-based amyloid imaging in biomedical fields, with particular attention to the application of gadolinium-based paramagnetic nanoparticles (AGuIX), which have been recently developed. Biocompatible AGuIX nanoparticles show favorable characteristics for in vivo use, such as nanometric and straightforward functionalization. Their properties have enabled their application in MRI. Here, we report that AGuIX nanoparticles grafted with the Pittsburgh compound B can actively target amyloid aggregates in the brain, beyond the blood–brain barrier, and remain the first step in observing amyloid plaques in a mouse model of Alzheimer’s disease.
Collapse
|
32
|
Lushchak O, Zayachkivska A, Vaiserman A. Metallic Nanoantioxidants as Potential Therapeutics for Type 2 Diabetes: A Hypothetical Background and Translational Perspectives. Oxid Med Cell Longev 2018; 2018:3407375. [PMID: 30050652 DOI: 10.1155/2018/3407375] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 05/04/2018] [Accepted: 05/20/2018] [Indexed: 02/06/2023]
Abstract
Hyperglycemia-induced overproduction of reactive oxygen species (ROS) is an important contributor to type 2 diabetes (T2D) pathogenesis. The conventional antioxidant therapy, however, proved to be ineffective for its treatment. This may likely be due to limited absorption profiles and low bioavailability of orally administered antioxidants. Therefore, novel antioxidant agents that may be delivered to specific target organs are actively developed now. Metallic nanoparticles (NPs), nanosized materials with a dimension of 1–100 nm, appear very promising for the treatment of T2D due to their tuned physicochemical properties and ability to modulate the level of oxidative stress. An excessive generation of ROS is considered to be the most common negative outcome related to the application of NPs. Several nanomaterials, however, were shown to exhibit enzyme-like antioxidant properties in animal models. Such NPs are commonly referred to as “nanoantioxidants.” Since NPs can provide specifically targeted or localized therapy, their use is a promising therapeutic option in addition to conventional therapy for T2D. NP-based therapies should certainly be used with caution given their potential toxicity and risk of adverse health outcomes. However, despite these challenges, NP-based therapeutic approaches have a great clinical potential and further translational studies are needed to confirm their safety and efficacy.
Collapse
|
33
|
Navarro-Tovar G, Rocha-García D, Wong-Arce A, Palestino G, Rosales-Mendoza S. Mesoporous Silicon Particles Favor the Induction of Long-Lived Humoral Responses in Mice to a Peptide-Based Vaccine. Materials (Basel) 2018; 11:E1083. [PMID: 29949862 DOI: 10.3390/ma11071083] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 06/12/2018] [Accepted: 06/13/2018] [Indexed: 01/28/2023]
Abstract
Vaccinology faces the challenge of developing improved immunization approaches that are able to induce long-term immunity with the desired Th profile according to the pathology. In this context, new vehicles for efficient antigen delivery that exert adjuvant effects play a critical role in addressing this goal. Herein, mesoporous silicon particles (PSiP) were assessed as carriers for a peptide-based vaccine targeting the receptor for advanced glycation end products (RAGE), which is a relevant receptor in Alzheimer´s disease and other diseases. A RAGE peptide was adsorbed onto PSiP (PSiP vaccine) and administered to BALB/c mice, leading to immune responses that were similar in magnitude to those induced by the soluble peptide. However, the response induced by PSiP lasted for a significantly longer period when compared with the behavior of the group immunized with the peptide alone. Therefore, PSiP are proposed as carriers to enhance immune memory, which is critical in vaccination. This study opens interesting perspectives related to the application of PSiP in vaccinology.
Collapse
|
34
|
Sanaeimehr Z, Javadi I, Namvar F. Antiangiogenic and antiapoptotic effects of green-synthesized zinc oxide nanoparticles using Sargassum muticum algae extraction. Cancer Nanotechnol 2018; 9:3. [PMID: 29628994 PMCID: PMC5879045 DOI: 10.1186/s12645-018-0037-5] [Citation(s) in RCA: 113] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Accepted: 01/18/2018] [Indexed: 01/16/2023] Open
Abstract
Background Algae are one of the natural materials used to green synthesis of nanoparticles. This method leads to minimize the toxicity of the chemical materials used to nanoparticle synthesis. Methods In this study, zinc oxide nanoparticles (ZnO NPs) synthesized by Sargassum muticum algae extraction used to evaluate its cytotoxicity and apoptotic properties on human liver cancer cell line (HepG2). Results Trypan blue assay results demonstrate a concentration-dependent decrease in cell viability and MTT assay shows increased growth inhibition in time and dose-dependent manner. In addition, CAM assay confirmed the ability of ZnO NPs to inhibit angiogenesis, but chick morphology (both the CR and weight) was not changed. Apoptotic tests (annexin V/PI and AO/PI) show that green-synthesized ZnO NPs induce apoptosis in all three time points (24, 48 and 72h). Conclusions Our results confirm the beneficial cytotoxic effects of green-synthesized ZnO NPs on Human liver cancer cell. This nanoparticle decreased angiogenesis and induces apoptosis, so we conclude that these nanoparticles can be used as a supplemental drug in cancer treatments.
Collapse
Affiliation(s)
- Zahra Sanaeimehr
- Department of Toxicology, Faculty of Pharmacy, Shahreza Branch, Islamic Azad University, Shahreza, Isfahan Iran
| | - Iraj Javadi
- Department of Toxicology, Faculty of Pharmacy, Shahreza Branch, Islamic Azad University, Shahreza, Isfahan Iran
| | - Farideh Namvar
- 2Departments of Medicine & AMP; Applied Biology Research Center, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| |
Collapse
|
35
|
Abstract
The use of chitosan (CS) as a carrier for slow fertilizer release is a novel trend. The potential effect of this system in agriculture is still debatable. Here, chitosan (CS) nanoparticles were obtained by polymerizing methacrylic acid (PMAA) for the entrapment of nitrogen, phosphorous and potassium (NPK) nanoparticles (NP), each at a time to form CS-PMAA-NPK NPs complex. The impact of this complex was evaluated using garden pea (Pisum sativum var. Master B) plants. Five-day-old pea seedlings were treated through their root system with CS-PMAA-NPK NPs at concentrations of 1, 0.5, 0.25, 0.125 and 0.0625 of the stock solution (R) for 1, 2, 4 and 7 days. In general, CS-PMAA-NPK NP complex reduced root elongation rate and resulted in the accumulation of starch at the root tip in a dose-dependent manner within the treated plants. Interestingly, the lowest concentrations of 0.0625 and 0.125 R had induced mitotic cell division (MI = 22.45 ± 2.68 and 19.72 ± 3.48, respectively) compared with the control (MI = 9.09 ± 3.28). In addition, some of major proteins such as convicilin, vicilin and legumin β were upregulated in plants treated with these low concentrations too. However, all concentrations used exhibited genotoxic effect on DNA based on the comet assay data after 48 h of treatment. Thus, it is highly recommended to consider the negative effects of this carrier system on plants and environment that may arise due to its accumulation in the agricultural fields.
Collapse
Affiliation(s)
- Noha S. Khalifa
- Botany Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | | |
Collapse
|
36
|
Suganthy N, Sri Ramkumar V, Pugazhendhi A, Benelli G, Archunan G. Biogenic synthesis of gold nanoparticles from Terminalia arjuna bark extract: assessment of safety aspects and neuroprotective potential via antioxidant, anticholinesterase, and antiamyloidogenic effects. Environ Sci Pollut Res Int 2018; 25:10418-10433. [PMID: 28762049 DOI: 10.1007/s11356-017-9789-4] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 07/19/2017] [Indexed: 05/21/2023]
Abstract
The development of neuroprotective drugs through eco-friendly production routes is a major challenge for current pharmacology. The present study was carried out to synthesize gold nanoparticles (AuNPs) through biogenic route using ethanolic bark extract of Terminalia arjuna, a plant of high interest in Asian traditional medicine, and to evaluate its neuroprotective effects. The synthesized AuNPs were characterized by UV-Vis spectroscopy, FTIR spectroscopy, XRD, FESEM, EDX, HRTEM, DLS, and zeta potential analyses. UV-Vis spectroscopy showed a characteristics SPR absorption band at 536 nm specific for AuNPs. XRD, TEM, and FESEM analyses revealed the formation of face-centered cubic crystalline, spherical and triangular shaped AuNPs, with size ranging between 20 and 50 nm. DLS and ZP analysis illustrated that the average size of AuNPs was 30 nm, which was found to be stable at 45 mv. The neuroprotective potential of AuNPs was evaluated by assessing its antioxidant, cholinesterase inhibitory, and antiamyloidogenic activities. AuNPs showed dose-dependant inhibition of acetylcholinesterase and butyrylcholinesterase with IC50 value of 4.25 ± 0.02 and 5.05 ± 0.02 μg/ml, respectively. In vitro antioxidant assays illustrated that AuNPs exhibited the highest reducing power and DPPH radical scavenging activity. In addition, AuNPs also efficiently suppressed the fibrillation of Aβ and destabilized the preformed mature fibrils. Results of toxicity studies in PBMC and adult zebra fish illustrated that AuNPs are non-toxic and biocompatible. Overall, our results highlighted the AuNPs promising potential in terms of antioxidant, anticholinesterase, antiamyloidogenic effects, and non-lethality allowing us to propose these nanomaterials as a suitable candidate for the development of drugs helpful in the treatment of neurodegenerative disorders like Alzheimer's disease. Graphical abstract ᅟ.
Collapse
Affiliation(s)
- Natarajan Suganthy
- Department of Nanoscience and Technology, Alagappa University, Karaikudi, Tamil Nadu, India.
- Centre for Pheromone Technology, Department of Animal Science, Bharadhidasan University, Tiruchirappalli, Tamil Nadu, India.
| | - Vijayan Sri Ramkumar
- Department of Environmental Biotechnology, Bharathidasan University, Tiruchirappalli, Tamil Nadu, India
| | - Arivalagan Pugazhendhi
- Green Processing, Bioremediation and Alternative Energies Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Giovanni Benelli
- Department of Agriculture, Food and Environment, University of Pisa, via del Borghetto 80, 56124, Pisa, Italy
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Viale Rinaldo Piaggio 34, 56025, Pisa, Pontedera, Italy
| | - Govindaraju Archunan
- Centre for Pheromone Technology, Department of Animal Science, Bharadhidasan University, Tiruchirappalli, Tamil Nadu, India.
| |
Collapse
|
37
|
Tarhini M, Benlyamani I, Hamdani S, Agusti G, Fessi H, Greige-Gerges H, Bentaher A, Elaissari A. Protein-Based Nanoparticle Preparation via Nanoprecipitation Method. Materials (Basel) 2018. [PMID: 29518919 PMCID: PMC5872973 DOI: 10.3390/ma11030394] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Nanoparticles are nowadays largely investigated in the field of drug delivery. Among nanoparticles, protein-based particles are of paramount importance since they are natural, biodegradable, biocompatible, and nontoxic. There are several methods to prepare proteins containing nanoparticles, but only a few studies have been dedicated to the preparation of protein- based nanoparticles. Then, the aim of this work was to report on the preparation of bovine serum albumin (BSA)-based nanoparticles using a well-defined nanoprecipitation process. Special attention has been dedicated to a systematic study in order to understand separately the effect of each operating parameter of the method (such as protein concentration, solvent/non-solvent volume ratio, non-solvent injection rate, ionic strength of the buffer solution, pH, and cross-linking) on the colloidal properties of the obtained nanoparticles. In addition, the mixing processes (batch or drop-wise) were also investigated. Using a well-defined formulation, submicron protein-based nanoparticles have been obtained. All prepared particles have been characterized in terms of size, size distribution, morphology, and electrokinetic properties. In addition, the stability of nanoparticles was investigated using Ultraviolet (UV) scan and electrophoresis, and the optimal conditions for preparing BSA nanoparticles by the nanoprecipitation method were concluded.
Collapse
Affiliation(s)
- Mohamad Tarhini
- Univ Lyon, Université Claude Bernard Lyon-1, CNRS, LAGEP UMR 5007, 43 boulevard du 11 Novembre 1918, F-69100 Villeurbanne, France.
- Faculty of Sciences, Lebanese University, B.P. 90656 Jdaidet El-Matn, Lebanon.
| | - Ihsane Benlyamani
- Univ Lyon, Université Claude Bernard Lyon-1, CNRS, LAGEP UMR 5007, 43 boulevard du 11 Novembre 1918, F-69100 Villeurbanne, France.
| | - Selim Hamdani
- Univ Lyon, Université Claude Bernard Lyon-1, CNRS, LAGEP UMR 5007, 43 boulevard du 11 Novembre 1918, F-69100 Villeurbanne, France.
| | - Géraldine Agusti
- Univ Lyon, Université Claude Bernard Lyon-1, CNRS, LAGEP UMR 5007, 43 boulevard du 11 Novembre 1918, F-69100 Villeurbanne, France.
| | - Hatem Fessi
- Univ Lyon, Université Claude Bernard Lyon-1, CNRS, LAGEP UMR 5007, 43 boulevard du 11 Novembre 1918, F-69100 Villeurbanne, France.
| | | | - Abderrazzak Bentaher
- Inflammation and Immunity of the Respiratory Epithelium-EA 7426, Faculté de Médecine Lyon Sud, 69495 Pierre Benite, France.
| | - Abdelhamid Elaissari
- Univ Lyon, Université Claude Bernard Lyon-1, CNRS, LAGEP UMR 5007, 43 boulevard du 11 Novembre 1918, F-69100 Villeurbanne, France.
| |
Collapse
|
38
|
Li Y, Wang P, Hu C, Wang K, Chang Q, Liu L, Han Z, Shao Y, Zhai Y, Zuo Z, Mak M, Gong Z, Wu Y. Protein corona of airborne nanoscale PM2.5 induces aberrant proliferation of human lung fibroblasts based on a 3D organotypic culture. Sci Rep 2018; 8:1939. [PMID: 29386584 PMCID: PMC5792617 DOI: 10.1038/s41598-018-20445-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 01/18/2018] [Indexed: 11/09/2022] Open
Abstract
Exposure to PM2.5 has become one of the most important factors affecting public health in the world. Both clinical and research studies have suggested that PM2.5 inhalation is associated with impaired lung function. In this study, material characterization identified the existence of nanoscale particulate matter (NPM) in airborne PM2.5 samples. When coming into contact with protein-rich fluids, the NPM becomes covered by a protein layer that forms a “protein corona”. Based on a 3D organotypic cell culture, the protein corona was shown to mitigate NPM cytotoxicity and further stimulate the proliferation of human lung fibroblasts (HLFs). ROS-activated alpha-smooth muscle actin (α-SMA) is considered to be one of the proliferation pathways. In this research, 3D cell cultures exhibited more tissue-like properties compared with the growth in 2D models. Animal models have been widely used in toxicological research. However, species differences make it impossible to directly translate discoveries from animals to humans. In this research, the 3D HLF model could partly simulate the biological responses of NPM-protein corona-induced aberrant HLF proliferation in the human lung. Our 3D cellular results provide auxiliary support for an animal model in research on PM2.5-induced impaired lung function, particularly in lung fibrosis.
Collapse
Affiliation(s)
- Yan Li
- Key Laboratory for Deep Processing of Major Grain and Oil (Wuhan Polytechnic University), Ministry of Education, College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, 430023, P. R. China.,Department of Biomedical Engineering, School of Engineering & Applied Science, Yale University, New Haven, 06520, USA
| | - Pengcheng Wang
- Key Laboratory for Deep Processing of Major Grain and Oil (Wuhan Polytechnic University), Ministry of Education, College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, 430023, P. R. China
| | - Chuanlin Hu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Kun Wang
- Division of Biostatistics, Department of Population Health, New York University, New York, 10016, USA
| | - Qing Chang
- Department of Chemical and Biomolecular Engineering, Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Lieju Liu
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, P. R. China
| | - Zhenggang Han
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, P. R. China
| | - Yang Shao
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, P. R. China
| | - Ying Zhai
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, P. R. China
| | - Zhengyu Zuo
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, P. R. China
| | - Michael Mak
- Department of Biomedical Engineering, School of Engineering & Applied Science, Yale University, New Haven, 06520, USA
| | - Zhiyong Gong
- Hubei Key Laboratory for Processing and Transformation of Agricultural Products (Wuhan Polytechnic University), College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, 430023, P. R. China.
| | - Yang Wu
- Hubei Key Laboratory for Processing and Transformation of Agricultural Products (Wuhan Polytechnic University), College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, 430023, P. R. China.
| |
Collapse
|
39
|
Mohammadi S, Nikkhah M, Hosseinkhani S. Investigation of the effects of carbon-based nanomaterials on A53T alpha-synuclein aggregation using a whole-cell recombinant biosensor. Int J Nanomedicine 2017; 12:8831-8840. [PMID: 29276384 PMCID: PMC5734227 DOI: 10.2147/ijn.s144764] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The aggregation of alpha-synuclein (αS), natively unstructured presynaptic protein, is a crucial factor leading to the pathogenesis of Parkinson’s disease (PD) and other related disorders. Recent studies have shown prefibrillar and oligomeric intermediates of αS as toxic to the cells. Herein, split-luciferase complementation assay is used to design a “signal-on” biosensor to monitor oligomerization of A53T αS inside the cells. Then, the effect of carbon-based nanomaterials, such as graphene quantum dots (GQDs) and graphene oxide quantum dots (GOQDs), on A53T αS oligomerization in vitro and in living cells is investigated. In this work, for the first time, it was found that GQDs at a concentration of 0.5 μg/mL can promote A53T αS aggregation by shortening the nucleation process, which is the key rate-determining step of fibrillation, thereby making a signal-on biosensor. While these nanomaterials may cross the blood–brain barrier because of their small sizes, the interaction between αS and GQDs may contribute to PD etiology.
Collapse
Affiliation(s)
| | | | - Saman Hosseinkhani
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| |
Collapse
|
40
|
Dehvari M, Ghahghaei A. The effect of green synthesis silver nanoparticles (AgNPs) from Pulicaria undulata on the amyloid formation in α-lactalbumin and the chaperon action of α-casein. Int J Biol Macromol 2017; 108:1128-1139. [PMID: 29225181 DOI: 10.1016/j.ijbiomac.2017.12.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 11/01/2017] [Accepted: 12/06/2017] [Indexed: 11/28/2022]
Abstract
The formation and deposition of protein fibrillar aggregates in the tissues is associated with several neurodegenerative diseases such as Alzheimer's and Parkinson's disease. Molecular chaperones are a family of proteins that are believed to have the ability to inhibit protein aggregation. The present study examines the effect of different concentrations of green synthesis silver nanoparticles (AgNPs) from Pulicaria undulata L. on the aggregation of α-lactalbumin (α-LA) and the chaperone action of αs-casein. The effects of the AgNPs were determined by measuring light scattering absorption, fluorescence (ThT assay, intrinsic fluorescence assay and ANS binding assay), TEM, CD spectroscopy and SDS-PAGE. The results showed that AgNPs have the ability to prevent the aggregation of α-LA in a concentration-dependent manner. In fact, by increasing the concentration of AgNPs within a specified range, the adsorption and interaction between AgNPs and protein have increased and protein conformational changes and self-association decreased, thus amyloid aggregation is prevented. Our results also showed that α-casein effectively prevented the aggregation of the α-lactalbumin which increased in the presence of the AgNPs. Standard experimental results, however, proved that nanoparticles had no effect on the structure and hence the chaperone ability of α-casein. Our findings showed that AgNPs can prevent protein aggregation and have no effect on the chaperone ability of αs-casein. In the main, results of this study show that biosynthesized AgNPs mediated by Pulicaria undulata L. has the capability in inhibiting amyloid fibril formation and thus could be consider as a therapeutic agent in the treatment of amyloidosis disorders.
Collapse
Affiliation(s)
- Mansoor Dehvari
- Department of Biology, Faculty of Science, University of Sistan and Baluchestan, Zahedan, Iran
| | - Arezou Ghahghaei
- Department of Biology, Faculty of Science, University of Sistan and Baluchestan, Zahedan, Iran.
| |
Collapse
|
41
|
Kang SM, Kim DH, Lee KY, Park SJ, Yoon HJ, Lee SJ, Im H, Lee BJ. Functional details of the Mycobacterium tuberculosis VapBC26 toxin-antitoxin system based on a structural study: insights into unique binding and antibiotic peptides. Nucleic Acids Res 2017; 45:8564-8580. [PMID: 28575388 PMCID: PMC5737657 DOI: 10.1093/nar/gkx489] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 05/25/2017] [Indexed: 11/16/2022] Open
Abstract
Toxin-antitoxin (TA) systems are essential for bacterial persistence under stressful conditions. In particular, Mycobacterium tuberculosis express VapBC TA genes that encode the stable VapC toxin and the labile VapB antitoxin. Under normal conditions, these proteins interact to form a non-toxic TA complex, but the toxin is activated by release from the antitoxin in response to unfavorable conditions. Here, we present the crystal structure of the M. tuberculosis VapBC26 complex and show that the VapC26 toxin contains a pilus retraction protein (PilT) N-terminal (PIN) domain that is essential for ribonuclease activity and that, the VapB26 antitoxin folds into a ribbon-helix-helix DNA-binding motif at the N-terminus. The active site of VapC26 is sterically blocked by the flexible C-terminal region of VapB26. The C-terminal region of free VapB26 adopts an unfolded conformation but forms a helix upon binding to VapC26. The results of RNase activity assays show that Mg2+ and Mn2+ are essential for the ribonuclease activity of VapC26. As shown in the nuclear magnetic resonance spectra, several residues of VapB26 participate in the specific binding to the promoter region of the VapBC26 operon. In addition, toxin-mimicking peptides were designed that inhibit TA complex formation and thereby increase toxin activity, providing a novel approach to the development of new antibiotics.
Collapse
Affiliation(s)
- Sung-Min Kang
- The Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Do-Hee Kim
- The Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Ki-Young Lee
- The Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Sung Jean Park
- College of Pharmacy, Gachon University, 534-2 Yeonsu-dong, Yeonsu-gu, Incheon 406-799, Republic of Korea
| | - Hye-Jin Yoon
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-742, Republic of Korea
| | - Sang Jae Lee
- The Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Hookang Im
- The Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Bong-Jin Lee
- The Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Gwanak-gu, Seoul 151-742, Republic of Korea
| |
Collapse
|
42
|
Mohammadi S, Nikkhah M. TiO2 Nanoparticles as Potential Promoting Agents of Fibrillation of α-Synuclein, a Parkinson's Disease-Related Protein. Iran J Biotechnol 2017; 15:87-94. [PMID: 29845055 DOI: 10.15171/ijb.1519] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Revised: 09/11/2016] [Accepted: 06/20/2017] [Indexed: 01/19/2023]
Abstract
Background: In recent years, nanomaterials have been widely used in large quantities which make people be more frequently exposed to the chemically synthesized nanoparticles (NPs). When NPs are introduced into an organism, they may interact with a variety of cellular components with yet largely unknown pathological consequences. Objective: It was found that NPs enhance the rate of protein fibrillation in the brain by decreasing the lag time for nucleation. Protein fibrillation is implicated in the pathogenesis of the several neurodegenerative diseases such as Parkinson's disease (PD). α-Synuclein (αS) is natively an unfolded protein which is involved in the pathogenesis of PD. In the present study, we have analyzed the effects of three different NPs on αS fibrillation. Materials and Methods: αS protein expression and purifi cation was done and fibrils formation was induced in the absence or presence of the three types of NPs (i. e., TiO2, SiO2, and SnO2). The enhancement of the fluorescence emission of Thiofl avin T (ThT) and transmission electron microscopy (TEM) were used to monitor the appearance and growth of the fibrils. The adsorption of αS monomers on the surface of NPs was investigated by tyrosine fluorescence emission measurements. Results: We found that TiO2-NPs enhances αS fibril formation even at a concentration of 5 μg.mL-1, while the two other NPs show no significant effect on the kinetics of the fibrillation. Intrinsic tyrosine emission measurement has confirmed that the TiO2-NPs interact with αS fibrillation products. It is suggested that TiO2- NPs may enhance the nucleation of αS protein that leads to protein fibril formation. Conclusion: The fibrillization process of αS protein is profoundly affected by the presence of TiO2-NPs. This finding unveils the neurotoxicity potential of the TiO2-NPs, which may be considered as a probable risk for PD.
Collapse
Affiliation(s)
- Soheila Mohammadi
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, 14115-175 Iran
| | - Maryam Nikkhah
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, 14115-175 Iran
| |
Collapse
|
43
|
Lin S, Mortimer M, Chen R, Kakinen A, Riviere JE, Davis TP, Ding F, Ke PC. NanoEHS beyond Toxicity - Focusing on Biocorona. Environ Sci Nano 2017; 7:1433-1454. [PMID: 29123668 PMCID: PMC5673284 DOI: 10.1039/c6en00579a] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The first phase of environmental health and safety of nanomaterials (nanoEHS) studies has been mainly focused on evidence-based investigations that probe the impact of nanoparticles, nanomaterials and nano-enabled products on biological and ecological systems. The integration of multiple disciplines, including colloidal science, nanomaterial science, chemistry, toxicology/immunology and environmental science, is necessary to understand the implications of nanotechnology for both human health and the environment. While strides have been made in connecting the physicochemical properties of nanomaterials with their hazard potential in tiered models, fundamental understanding of nano-biomolecular interactions and their implications for nanoEHS is largely absent from the literature. Research on nano-biomolecular interactions within the context of natural systems not only provides important clues for deciphering nanotoxicity and nanoparticle-induced pathology, but also presents vast new opportunities for screening beneficial material properties and designing greener products from bottom up. This review highlights new opportunities concerning nano-biomolecular interactions beyond the scope of toxicity.
Collapse
Affiliation(s)
- Sijie Lin
- College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Monika Mortimer
- Bren School of Environmental Science and Management, Earth Research Institute and University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States
| | - Ran Chen
- Nanotechnology Innovation Center of Kansas State, Kansas State University, Manhattan, Kansas 66506, United States
| | - Aleksandr Kakinen
- ARC Center of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Jim E. Riviere
- Nanotechnology Innovation Center of Kansas State, Kansas State University, Manhattan, Kansas 66506, United States
| | - Thomas P. Davis
- ARC Center of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
- Department of Chemistry, University of Warwick, Gibbet Hill, Coventry, CV4 7AL, United Kingdom
| | - Feng Ding
- Department of Physics and Astronomy, Clemson University, Clemson, SC 29634, United States
| | - Pu Chun Ke
- ARC Center of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| |
Collapse
|
44
|
Xing Y, Feng XZ, Zhang L, Hou J, Han GC, Chen Z. A sensitive and selective electrochemical biosensor for the determination of beta-amyloid oligomer by inhibiting the peptide-triggered in situ assembly of silver nanoparticles. Int J Nanomedicine 2017; 12:3171-3179. [PMID: 28458538 PMCID: PMC5402878 DOI: 10.2147/ijn.s132776] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Soluble beta-amyloid (Aβ) oligomer is believed to be the most important toxic species in the brain of Alzheimer’s disease (AD) patients. Thus, it is critical to develop a simple method for the selective detection of Aβ oligomer with low cost and high sensitivity. In this paper, we report an electrochemical method for the detection of Aβ oligomer with a peptide as the bioreceptor and silver nanoparticle (AgNP) aggregates as the redox reporters. This strategy is based on the conversion of AgNP-based colorimetric assay into electrochemical analysis. Specifically, the peptide immobilized on the electrode surface and presented in solution triggered together the in situ formation of AgNP aggregates, which produced a well-defined electrochemical signal. However, the specific binding of Aβ oligomer to the immobilized peptide prevented the in situ assembly of AgNPs. As a result, a poor electrochemical signal was observed. The detection limit of the method was found to be 6 pM. Furthermore, the amenability of this method for the analysis of Aβ oligomer in serum and artificial cerebrospinal fluid (aCSF) samples was demonstrated.
Collapse
Affiliation(s)
- Yun Xing
- Henan Province of Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang.,School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, People's Republic of China
| | - Xiao-Zhen Feng
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, People's Republic of China
| | - Lipeng Zhang
- Henan Province of Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang
| | - Jiating Hou
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, People's Republic of China
| | - Guo-Cheng Han
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, People's Republic of China
| | - Zhencheng Chen
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, People's Republic of China
| |
Collapse
|
45
|
Moore KA, Pate KM, Soto-Ortega DD, Lohse S, van der Munnik N, Lim M, Jackson KS, Lyles VD, Jones L, Glassgow N, Napumecheno VM, Mobley S, Uline MJ, Mahtab R, Murphy CJ, Moss MA. Influence of gold nanoparticle surface chemistry and diameter upon Alzheimer's disease amyloid-β protein aggregation. J Biol Eng 2017; 11:5. [PMID: 28191036 PMCID: PMC5292815 DOI: 10.1186/s13036-017-0047-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 01/03/2017] [Indexed: 12/30/2022] Open
Abstract
Background Deposits of aggregated amyloid-β protein (Aβ) are a pathological hallmark of Alzheimer’s disease (AD). Thus, one therapeutic strategy is to eliminate these deposits by halting Aβ aggregation. While a variety of possible aggregation inhibitors have been explored, only nanoparticles (NPs) exhibit promise at low substoichiometric ratios. With tunable size, shape, and surface properties, NPs present an ideal platform for rationally designed Aβ aggregation inhibitors. In this study, we characterized the inhibitory capabilities of gold nanospheres exhibiting different surface coatings and diameters. Results Both NP diameter and surface chemistry were found to modulate the extent of aggregation, while NP electric charge influenced aggregate morphology. Notably, 8 nm and 18 nm poly(acrylic acid)-coated NPs abrogated Aβ aggregation at a substoichiometric ratio of 1:2,000,000. Theoretical calculations suggest that this low stoichiometry could arise from altered solution conditions near the NP surface. Specifically, local solution pH and charge density are congruent with conditions that influence aggregation. Conclusions These findings demonstrate the potential of surface-coated gold nanospheres to serve as tunable therapeutic agents for the inhibition of Aβ aggregation. Insights gained into the physiochemical properties of effective NP inhibitors will inform future rational design of effective NP-based therapeutics for AD. Electronic supplementary material The online version of this article (doi:10.1186/s13036-017-0047-6) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Kelly A Moore
- Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208 USA
| | - Kayla M Pate
- Department of Chemical Engineering, University of South Carolina, 2C02 Swearingen Engineering Center, Columbia, SC 29208 USA
| | - Deborah D Soto-Ortega
- Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208 USA
| | - Samuel Lohse
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
| | - Nicholas van der Munnik
- Department of Chemical Engineering, University of South Carolina, 2C02 Swearingen Engineering Center, Columbia, SC 29208 USA
| | - Mihyun Lim
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208 USA
| | - Kaliah S Jackson
- Department of Biological and Physical Sciences, South Carolina State University, Orangeburg, SC 29117 USA
| | - Venetia D Lyles
- Department of Biological and Physical Sciences, South Carolina State University, Orangeburg, SC 29117 USA
| | - Lemeisha Jones
- Department of Biological and Physical Sciences, South Carolina State University, Orangeburg, SC 29117 USA
| | - Nisha Glassgow
- Department of Biological and Physical Sciences, South Carolina State University, Orangeburg, SC 29117 USA
| | - Vanessa M Napumecheno
- Department of Biological and Physical Sciences, South Carolina State University, Orangeburg, SC 29117 USA
| | - Shanee Mobley
- Department of Biological and Physical Sciences, South Carolina State University, Orangeburg, SC 29117 USA
| | - Mark J Uline
- Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208 USA.,Department of Chemical Engineering, University of South Carolina, 2C02 Swearingen Engineering Center, Columbia, SC 29208 USA
| | - Rahina Mahtab
- Department of Biological and Physical Sciences, South Carolina State University, Orangeburg, SC 29117 USA
| | - Catherine J Murphy
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
| | - Melissa A Moss
- Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208 USA.,Department of Chemical Engineering, University of South Carolina, 2C02 Swearingen Engineering Center, Columbia, SC 29208 USA
| |
Collapse
|
46
|
Wang J, Zhu Z, Bortolini C, Hoffmann SV, Amari A, Zhang HX, Liu L, Dong MD. Dimensionality of carbon nanomaterial impacting on the modulation of amyloid peptide assembly. Nanotechnology 2016; 27:304001. [PMID: 27302044 DOI: 10.1088/0957-4484/27/30/304001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A wide variety of inorganic nanomaterials have been exploited so far for their great potential for biological applications. Some of these materials could be valid candidates to modulate the assembly of amyloid peptides, which is relevant to amyloid-related diseases. In this work, we reveal that a carbon nanomaterial can indeed modulate the assembly of amyloid peptides and, additionally, we show that this modulating effect is closely related to the dimensionality of the nanomaterials.
Collapse
Affiliation(s)
- J Wang
- Institute for Advanced Materials, Jiangsu University, Zhenjiang, 212013, People's Republic of China
| | | | | | | | | | | | | | | |
Collapse
|
47
|
Zaman M, Zakariya SM, Nusrat S, Khan MV, Qadeer A, Ajmal MR, Khan RH. Surfactant-mediated amyloidogenesis behavior of stem bromelain; a biophysical insight. J Biomol Struct Dyn 2016; 35:1407-1419. [DOI: 10.1080/07391102.2016.1185040] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Masihuz Zaman
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Syed Mohammad Zakariya
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Saima Nusrat
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Mohsin Vahid Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Atiyatul Qadeer
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Mohammad Rehan Ajmal
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
| |
Collapse
|
48
|
Nusrat S, Siddiqi MK, Zaman M, Zaidi N, Ajmal MR, Alam P, Qadeer A, Abdelhameed AS, Khan RH. A Comprehensive Spectroscopic and Computational Investigation to Probe the Interaction of Antineoplastic Drug Nordihydroguaiaretic Acid with Serum Albumins. PLoS One 2016; 11:e0158833. [PMID: 27391941 PMCID: PMC4938263 DOI: 10.1371/journal.pone.0158833] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Accepted: 06/22/2016] [Indexed: 11/19/2022] Open
Abstract
Exogenous drugs that are used as antidote against chemotheray, inflammation or viral infection, gets absorbed and interacts reversibly to the major serum transport protein i.e. albumins, upon entering the circulatory system. To have a structural guideline in the rational drug designing and in the synthesis of drugs with greater efficacy, the binding mechanism of an antineoplastic and anti-inflammatory drug Nordihydroguaiaretic acid (NDGA) with human and bovine serum albumins (HSA & BSA) were examined by spectroscopic and computational methods. NDGA binds to site II of HSA with binding constant (Kb) ~105 M-1 and free energy (ΔG) ~ -7.5 kcal.mol-1. It also binds at site II of BSA but with lesser binding affinity (Kb) ~105 M-1 and ΔG ~ -6.5 kcal.mol-1. The negative value of ΔG, ΔH and ΔS for both the albumins at three different temperatures confirmed that the complex formation process between albumins and NDGA is spontaneous and exothermic. Furthermore, hydrogen bonds and hydrophobic interactions are the main forces involved in complex formation of NDGA with both the albumins as evaluated from fluorescence and molecular docking results. Binding of NDGA to both the albumins alter the conformation and causes minor change in the secondary structure of proteins as indicated by the CD spectra.
Collapse
Affiliation(s)
- Saima Nusrat
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
| | | | - Masihuz Zaman
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
| | - Nida Zaidi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
| | - Mohammad Rehan Ajmal
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
| | - Parvez Alam
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
| | - Atiyatul Qadeer
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
| | - Ali Saber Abdelhameed
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
- * E-mail:
| |
Collapse
|
49
|
Chowdhury SR, Agarwal M, Meher N, Muthuraj B, Iyer PK. Modulation of Amyloid Aggregates into Nontoxic Coaggregates by Hydroxyquinoline Appended Polyfluorene. ACS Appl Mater Interfaces 2016; 8:13309-13319. [PMID: 27152771 DOI: 10.1021/acsami.6b03668] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Inhibitory modulation toward de novo protein aggregation is likely to be a vital and promising therapeutic strategy for understanding the molecular etiology of amyloid related diseases such as Alzheimer's disease (AD). The building up of toxic oligomeric and fibrillar amyloid aggregates in the brain plays host to a downstream of events, causing damage to axons, dendrites, synapses, signaling, transmission, and finally cell death. Herein, we introduce a novel conjugated polymer (CP), hydroxyquinoline appended polyfluorene (PF-HQ), which has a typical "amyloid like" surface motif and exhibits inhibitory modulation effect on amyloid β (Aβ) aggregation. We delineate inhibitory effects of PF-HQ based on Thioflavin T (ThT) fluorescence, atomic force microscopy (AFM), circular dichroism (CD), and Fourier transform infrared (FTIR) studies. The amyloid-like PF-HQ forms nano coaggregates by templating with toxic amyloid intermediates and displays improved inhibitory impacts toward Aβ fibrillation and diminishes amyloid cytotoxicity. We have developed a CP based modulation strategy for the first time, which demonstrates beneficiary amyloid-like surface motif to interact efficiently with the protein, the pendant side groups to trap the toxic amyloid intermediates as well as optical signal to acquire the mechanistic insight.
Collapse
Affiliation(s)
- Sayan Roy Chowdhury
- Department of Chemistry, ‡Department of Bioscience and Bioengineering, and §Center for Nanotechnology, Indian Institute of Technology Guwahati , Guwahati, 781039 Assam, India
| | - Mahesh Agarwal
- Department of Chemistry, ‡Department of Bioscience and Bioengineering, and §Center for Nanotechnology, Indian Institute of Technology Guwahati , Guwahati, 781039 Assam, India
| | - Niranjan Meher
- Department of Chemistry, ‡Department of Bioscience and Bioengineering, and §Center for Nanotechnology, Indian Institute of Technology Guwahati , Guwahati, 781039 Assam, India
| | - Balakrishnan Muthuraj
- Department of Chemistry, ‡Department of Bioscience and Bioengineering, and §Center for Nanotechnology, Indian Institute of Technology Guwahati , Guwahati, 781039 Assam, India
| | - Parameswar Krishnan Iyer
- Department of Chemistry, ‡Department of Bioscience and Bioengineering, and §Center for Nanotechnology, Indian Institute of Technology Guwahati , Guwahati, 781039 Assam, India
| |
Collapse
|
50
|
Breydo L, Newland B, Zhang H, Rosser A, Werner C, Uversky VN, Wang W. A hyperbranched dopamine-containing PEG-based polymer for the inhibition of α-synuclein fibrillation. Biochem Biophys Res Commun 2016; 469:830-5. [PMID: 26707645 PMCID: PMC4727786 DOI: 10.1016/j.bbrc.2015.12.060] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 12/15/2015] [Indexed: 01/06/2023]
Abstract
Aggregation of α-synuclein is believed to play an important role in Parkinson's disease and in other neurodegenerative maladies. Small molecule inhibitors of this process are among the most promising drug candidates for neurodegenerative diseases. Dendrimers have also been studied for anti-fibrillation applications but they can be difficult and expensive to synthetize. Here we show that RAFT polymerization can be used to produce a hyperbranched polyethylene glycol structure via a one-pot reaction. This polymer included a dopamine moiety, a known inhibitor of α-synuclein fibril formation. Dopamine within the polymer structure was capable of aggregation inhibition, although not to the same degree as free dopamine. This result opens up new avenues for the use of controlled radical polymerizations as a means of preparing hyperbranched polymers for anti-fibrillation activity, but shows that the incorporation of functional groups from known small molecules within polymers may alter their biological activity.
Collapse
Affiliation(s)
- Leonid Breydo
- Department of Molecular Medicine and Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, 33612 Tampa, FL, USA.
| | - Ben Newland
- Leibniz-Institute für Polymerforschung, Dresden, Germany; Brain Repair Group, School of Biosciences, Cardiff University, Cardiff, UK
| | - Hong Zhang
- The Charles Institute of Dermatology, School of Medicine and Medical Science, University College Dublin, Dublin, Ireland
| | - Anne Rosser
- Brain Repair Group, School of Biosciences, Cardiff University, Cardiff, UK
| | - Carsten Werner
- Leibniz-Institute für Polymerforschung, Dresden, Germany
| | - Vladimir N Uversky
- Department of Molecular Medicine and Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, 33612 Tampa, FL, USA; Institute for Biological Instrumentation, Russian Academy of Sciences, 142292 Pushchino, Moscow Region, Russia; Department of Biological Sciences, Faculty of Science, King Abdulaziz University, PO Box 80203, 21589 Jeddah, Saudi Arabia
| | - Wenxin Wang
- The Charles Institute of Dermatology, School of Medicine and Medical Science, University College Dublin, Dublin, Ireland; School of Materials Science and Engineering, Tianjin University, Tianjin, China
| |
Collapse
|