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Sant V, Som M, Karkisaval AG, Carnahan P, Lal R. Scavenging amyloid oligomers from neurons with silica nanobowls: Implications for amyloid diseases. Biophys J 2021; 120:3329-3340. [PMID: 34242592 PMCID: PMC8391079 DOI: 10.1016/j.bpj.2021.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/20/2021] [Accepted: 07/01/2021] [Indexed: 12/15/2022] Open
Abstract
Amyloid-β (Aβ) oligomers are toxic species implicated in Alzheimer's disease (AD). The prevailing hypothesis implicates a major role of membrane-associated amyloid oligomers in AD pathology. Our silica nanobowls (NB) coated with lipid-polymer have submicromolar affinity for Aβ binding. We demonstrate that NB scavenges distinct fractions of Aβs in a time-resolved manner from amyloid precursor protein-null neuronal cells after incubation with Aβ. At short incubation times in cell culture, NB-Aβ seeds have aggregation kinetics resembling that of extracellular fraction of Aβ, whereas at longer incubation times, NB-Aβ seeds scavenge membrane-associated Aβ. Aβ aggregates can be eluted from NB surfaces by mechanical agitation and appear to retain their aggregation driving domains as seen in seeding aggregation experiments. These results demonstrate that the NB system can be used for time-resolved separation of toxic Aβ species from biological samples for characterization and in diagnostics. Scavenging membrane-associated amyloids using lipid-functionalized NB without chemical manipulation has wide applications in the diagnosis and therapy of AD and other neurodegenerative diseases, cancer, and cardiovascular conditions.
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Affiliation(s)
- Vrinda Sant
- Materials Science and Engineering, University of California San Diego, La Jolla, California.
| | - Madhura Som
- Department of Nanoengineering, University of California San Diego, La Jolla, California
| | - Abhijith G Karkisaval
- Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, California
| | - Parker Carnahan
- Department of Bioengineering, University of California San Diego, La Jolla, California
| | - Ratnesh Lal
- Materials Science and Engineering, University of California San Diego, La Jolla, California; Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, California.
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2
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Long T, Wu H, Yu H, Thushara D, Bao B, Zhao S, Liu H. Thermodynamic Barrier for Nanoparticle Penetration into Nanotubes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:15514-15522. [PMID: 33337163 DOI: 10.1021/acs.langmuir.0c02741] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
It is promising yet challenging to develop efficient methods to separate nanoparticles (NPs) with nanochannel devices. Herein, in order to guide and develop the separation method, the thermodynamic mechanism of NP penetration into solvent-filled nanotubes is investigated by using classical density functional theory. The potential of mean force (PMF) is calculated to evaluate the thermodynamic energy barrier for NP penetration into nanotubes. The accuracy of the theory is validated by comparing it with parallel molecular dynamics simulation. By examining the effects of nanotube size, solvent density, and substrate wettability on the PMF, we find that a large tube, a low bulk solvent density, and a solvophilic substrate can boost the NP penetration into nanotubes. In addition, it is found that an hourglass-shaped entrance can effectively improve the NP penetration efficiency compared with a square-shaped entrance. Furthermore, the minimum separation density of NPs in solution is identified, below which the NP penetration into nanotubes requires an additional driving force. Our findings provide fundamental insights into the thermodynamic barrier for NP penetration into nanotubes, which may provide theoretical guidance for separating two components using microfluidics.
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Affiliation(s)
- Ting Long
- State Key Laboratory of Chemical Engineering and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hongguan Wu
- State Key Laboratory of Chemical Engineering and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hongping Yu
- State Key Laboratory of Chemical Engineering and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Dilantha Thushara
- Department of Chemical and Process Engineering, University of Moratuwa, Moratuwa 10400, Sri Lanka
| | - Bo Bao
- State Key Laboratory of Chemical Engineering and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Shuangliang Zhao
- State Key Laboratory of Chemical Engineering and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology and School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Honglai Liu
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
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3
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Luo K, Park H, Adra HJ, Ryu J, Lee JH, Yu J, Choi SJ, Kim YR. Charge-switchable magnetic separation and characterization of food additive titanium dioxide nanoparticles from commercial food. JOURNAL OF HAZARDOUS MATERIALS 2020; 393:122483. [PMID: 32208332 DOI: 10.1016/j.jhazmat.2020.122483] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/04/2020] [Accepted: 03/05/2020] [Indexed: 06/10/2023]
Abstract
Growing concerns about the potential health effects of nanoscale titanium dioxide (TiO2) have necessitated the need for monitoring the size distribution and physicochemical properties of food additive TiO2 that are present in commercial food. Acid digestion is by far the most widely used method to remove interfering food matrices, but the highly corrosive nature of the reaction could alter the physicochemical properties of the TiO2, which may give a skewed information about the materials. Here, we report an effective approach to extract intact form of food additive TiO2 nanoparticles from processed food through charge-charge interaction between TiO2 particles and charge-switchable starch magnetic beads (PL@SMBs), of which the captured TiO2 is readily harvested by switching the surface charge of PL@SMBs to neutral. The size and surface property of extracted TiO2 were shown to be well maintained due to the mild nature of the reaction. The extracted TiO2 particles from 10 commercial processed food showed a size distribution from 40 to 250 nm with a mean diameter of 115 nm, of which 22 % of them were less than 100 nm. The extracted TiO2 did not exhibit short-term cytotoxicity, but induced cellular oxidative stress at high concentration.
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Affiliation(s)
- Ke Luo
- Graduate School of Biotechnology & Department of Food Science and Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, South Korea
| | - Hyein Park
- Graduate School of Biotechnology & Department of Food Science and Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, South Korea
| | - Hazzel Joy Adra
- Graduate School of Biotechnology & Department of Food Science and Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, South Korea
| | - Jian Ryu
- Graduate School of Biotechnology & Department of Food Science and Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, South Korea
| | - Jun-Hee Lee
- Graduate School of Biotechnology & Department of Food Science and Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, South Korea
| | - Jin Yu
- Department of Applied Food System, Major of Food Science & Technology, Seoul Women's University, Seoul, 01797, South Korea
| | - Soo-Jin Choi
- Department of Applied Food System, Major of Food Science & Technology, Seoul Women's University, Seoul, 01797, South Korea
| | - Young-Rok Kim
- Graduate School of Biotechnology & Department of Food Science and Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, South Korea.
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4
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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: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [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.
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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
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Strachowski P, Fronczak M, Olechno E, Kowalik M, Kiciński W, Kaszuwara W, Bystrzejewski M. Magnetic organic xerogels: efficient adsorbents for the removal of heavy metal ions from aqueous solutions. NEW J CHEM 2018. [DOI: 10.1039/c8nj01251b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The synthesis of novel mobile composite adsorbents dedicated to the efficient removal of heavy metal ions from aqueous solutions is presented.
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Affiliation(s)
| | | | - Eliza Olechno
- University of Warsaw
- Faculty of Chemistry
- 02-093 Warsaw
- Poland
| | | | - Wojciech Kiciński
- Military University of Technology
- Faculty of Advanced Technologies and Chemistry
- 00-908 Warsaw
- Poland
| | - Waldemar Kaszuwara
- Warsaw University of Technology
- Faculty of Materials Science and Engineering
- 02-507 Warsaw
- Poland
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6
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Su C. Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature. JOURNAL OF HAZARDOUS MATERIALS 2017; 322:48-84. [PMID: 27477792 PMCID: PMC7306924 DOI: 10.1016/j.jhazmat.2016.06.060] [Citation(s) in RCA: 146] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 06/27/2016] [Accepted: 06/30/2016] [Indexed: 05/12/2023]
Abstract
This review focuses on environmental implications and applications of engineered magnetite (Fe3O4) nanoparticles (MNPs) as a single phase or a component of a hybrid nanocomposite that exhibits superparamagnetism and high surface area. MNPs are synthesized via co-precipitation, thermal decomposition and combustion, hydrothermal process, emulsion, microbial process, and green approaches. Aggregation/sedimentation and transport of MNPs depend on surface charge of MNPs and geochemical parameters such as pH, ionic strength, and organic matter. MNPs generally have low toxicity to humans and ecosystem. MNPs are used for constructing chemical/biosensors and for catalyzing a variety of chemical reactions. MNPs are used for air cleanup and carbon sequestration. MNP nanocomposites are designed as antimicrobial agents for water disinfection and flocculants for water treatment. Conjugated MNPs are widely used for adsorptive/separative removal of organics, dyes, oil, arsenic, phosphate, molybdate, fluoride, selenium, Cr(VI), heavy metal cations, radionuclides, and rare earth elements. MNPs can degrade organic/inorganic contaminants via chemical reduction or catalyze chemical oxidation in water, sediment, and soil. Future studies should further explore mechanisms of MNP interactions with other nanomaterials and contaminants, economic and green approaches of MNP synthesis, and field scale demonstration of MNP utilization.
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Affiliation(s)
- Chunming Su
- Ground Water and Ecosystems Restoration Division, National Risk Management Research Laboratory, Office of Research and Development, United States Environmental Protection Agency, 919 Kerr Research Drive, Ada, OK 74820, USA.
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