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El-Naggar NEA, Rabei NH, Elmansy MF, Elmessiry OT, El-Sherbeny MK, El-Saidy ME, Sarhan MT, Helal MG. Artificial neural network approach for prediction of AuNPs biosynthesis by Streptomyces flavolimosus, characterization, antitumor potency in-vitro and in-vivo against Ehrlich ascites carcinoma. Sci Rep 2023; 13:12686. [PMID: 37542154 PMCID: PMC10403537 DOI: 10.1038/s41598-023-39177-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 07/20/2023] [Indexed: 08/06/2023] Open
Abstract
Gold nanoparticles (AuNPs) have emerged as promising and versatile nanoparticles for cancer therapy and are widely used in drug and gene delivery, biomedical imaging, diagnosis, and biosensors. The current study describes a biological-based strategy for AuNPs biosynthesis using the cell-free supernatant of Streptomyces flavolimosus. The biosynthesized AuNPs have an absorption peak at 530-535 nm. The TEM images indicate that AuNPs were spherical and ranged in size from 4 to 20 nm. The surface capping molecules of AuNPs are negatively charged, having a Zeta potential of - 10.9 mV. FTIR analysis revealed that the AuNPs surface composition contains a variety of functional groups as -OH, C-H, N-, C=O, NH3+, amine hydrochloride, amide group of proteins, C-C and C-N. The bioprocess variables affecting AuNPs biosynthesis were optimized by using the central composite design (CCD) in order to maximize the AuNPs biosynthesis. The maximum yield of AuNPs (866.29 µg AuNPs/mL) was obtained using temperature (35 °C), incubation period (4 days), HAuCl4 concentration (1000 µg/mL) and initial pH level 6. Comparison was made between the fitness of CCD versus Artificial neural network (ANN) approach based on their prediction and the corresponding experimental results. AuNPs biosynthesis values predicted by ANN exhibit a more reasonable agreement with the experimental result. The anticancer activities of AuNPs were assessed under both in vitro and in vivo conditions. The results revealed a significant inhibitory effect on the proliferation of the MCF-7 and Hela carcinoma cell lines treated with AuNPs with IC50 value of 13.4 ± 0.44 μg/mL and 13.8 ± 0.45 μg/mL for MCF-7 and Hela cells; respectively. Further, AuNPs showed potential inhibitory effect against tumor growth in tumor-bearing mice models. AuNPs significantly reduced the tumor volume, tumor weight, and decreased number of viable tumor cells in EAC bearing mice.
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Affiliation(s)
- Noura El-Ahmady El-Naggar
- Department of Bioprocess Development, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, 21934, Alexandria, Egypt.
| | - Nashwa H Rabei
- Department of Bioprocess Development, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, 21934, Alexandria, Egypt
| | - Mohamed F Elmansy
- Biotechnology and Its Application Program, Department of Botany, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt
| | - Omar T Elmessiry
- Biotechnology and Its Application Program, Department of Botany, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt
| | - Mostafa K El-Sherbeny
- Biotechnology and Its Application Program, Department of Botany, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt
| | - Mohanad E El-Saidy
- Biotechnology and Its Application Program, Department of Botany, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt
| | - Mohamed T Sarhan
- Biotechnology and Its Application Program, Department of Botany, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt
| | - Manar G Helal
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
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Ullah R, Tuzen M, Hazer B. Novel silver-morphine-functionalized polypropylene (AgPP-mrp) nanocomposite for the degradation of dye removal by multivariate optimization approach. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:79904-79915. [PMID: 37286840 DOI: 10.1007/s11356-023-27959-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 05/24/2023] [Indexed: 06/09/2023]
Abstract
As a novel adsorbent, an opioid silver-morphine-functionalized polypropylene was synthesized through a one-pot reaction at room temperature and successfully used for the simple one-pot photocatalytic degradation catalyst of methyl orange removal from wastewater. UV spectral analysis reveals a special reference to the excitation of surface plasmon resonance as the main characteristic of the polymer-Ag nanocomposite in toluene solution peak at 420 nm in AgPP-mrp catalyst. The 1H NMR spectrum showed no sign of Ag NP peaks revealing small size distribution in the channels of morphine-functionalized polypropylene polymer. The morphology of silver nanoparticle-doped polymer through scanning electron microscopy (SEM-EDX) reveals PP-mrp with continuous matrix and Ag NPs (0.87 wt%). Furthermore, photocatalytic degradation of methyl orange was investigated on AgPP-mrp catalyst spectrophotometrically under solar irradiation in waste effluent, demonstrating high degradation efficiency. According to experimental findings, silver nanoparticles (AgPP-mrp) achieved high degradation capacities of 139 mg/g equivalent to 97.4% of photodegradation in a little period of time (35 min), as associated with previously stated materials and follow pseudo-second-order kinetic degradation tail of a high regression coefficient (R2 = 0.992). The suggested techniques offer a linear reaction for MO over the pH range of 1.5 to 5 and a degradation temperature of 25 to 60 °C. Central composite design and response surface methodology statistics recommend pH of the reaction medium and time as important variables for methyl orange degradation on AgPP-mrp photocatalytic. AgPP-mrp on the photocatalytic phenomenon based on heterojunction catalytic design producing electron holes (e-), as well as superoxides for the successful degradation of methyl orange.
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Affiliation(s)
- Rooh Ullah
- Chemistry Department, Faculty of Science and Arts, Tokat Gaziosmanpasa University, 60250, Tokat, Turkey
- Department of Chemistry, University of Turbat, Balochistan, Pakistan
| | - Mustafa Tuzen
- Chemistry Department, Faculty of Science and Arts, Tokat Gaziosmanpasa University, 60250, Tokat, Turkey.
| | - Baki Hazer
- Department of Aircraft Airframe Engine Maintenance, Kapadokya University, Nevşehir, Turkey
- Department of Nano Technology Engineering, Zonguldak Bülent Ecevit University, 67100, Zonguldak, Turkey
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Gamma Radiation Induced Synthesis of Novel Chitosan/Gold/Bioactive Glass Nanocomposite for Promising Antimicrobial, and Antibiofilm Activities. J CLUST SCI 2022. [DOI: 10.1007/s10876-022-02357-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
AbstractIn the present study we reported, for the first time, the gamma irradiation induced synthesis of chitosan/Au/bioactive glass (CS/Au/BG) nanocomposite. The bioactive glass (BG), with the composition 45% SiO2, 32.5% CaO, 15% Na2O, and 7.5% P2O5 wt% was synthesized through the sol–gel technique. XRD, SEM, EDX, and elemental mapping images were utilized to evaluate the structure of pure BG and CS/Au/BG nanocomposite. The antimicrobial efficacy was evaluated by zone of inhibition (ZOI), minimum inhibitory concentration (MIC), growth curve assay, and Ultraviolet irradiation effect. Investigation was carried on the antibiofilm effectiveness. Membrane leakage as well as SEM imaging were used to evaluate the antibacterial reaction mechanism. The crystallite size of CS/Au/BG nanocomposite was determined via Scherer equation as 22.83 nm. CS/Au/BG possessed the most ZOI activity against the tested microbes. The highest inhibition % of BG, and CS/Au/BG nanocomposite was investigated for S. aureus (15.65%, and 77.24%), followed by C. albicans (13.32%, and 64.75%). The quantity of protein leakage was directly-proportional after increasing the concentration of BG, and CS/Au/BG and counted to be 70.58, and 198.25 µg/mL, respectively (after applied 10 mg/mL). The promising results suggested the use of novel CS/Au/BG nanocomposite as an encourage candidate for wastewater treatment application against pathogenic microbes.
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Inam AKMS, Angeli MAC, Douaki A, Shkodra B, Lugli P, Petti L. An Aptasensor Based on a Flexible Screen-Printed Silver Electrode for the Rapid Detection of Chlorpyrifos. SENSORS 2022; 22:s22072754. [PMID: 35408368 PMCID: PMC9003324 DOI: 10.3390/s22072754] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 03/24/2022] [Accepted: 03/30/2022] [Indexed: 11/16/2022]
Abstract
In this work, we propose a novel disposable flexible and screen-printed electrochemical aptamer-based sensor (aptasensor) for the rapid detection of chlorpyrifos (CPF). To optimize the process, various characterization procedures were employed, including Fourier transform infrared spectroscopy (FT-IR), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV). Initially, the aptasensor was optimized in terms of electrolyte pH, aptamer concentration, and incubation time for chlorpyrifos. Under optimal conditions, the aptasensor showed a wide linear range from 1 to 105 ng/mL with a calculated limit of detection as low as 0.097 ng/mL and sensitivity of 600.9 µA/ng. Additionally, the selectivity of the aptasensor was assessed by identifying any interference from other pesticides, which were found to be negligible (with a maximum standard deviation of 0.31 mA). Further, the stability of the sample was assessed over time, where the reported device showed high stability over a period of two weeks at 4 °C. As the last step, the ability of the aptasensor to detect chlorpyrifos in actual samples was evaluated by testing it on banana and grape extracts. As a result, the device demonstrated sufficient recovery rates, which indicate that it can find application in the food industry.
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Affiliation(s)
- A. K. M. Sarwar Inam
- Sensing Technologies Laboratory, Faculty of Science and Technology, Free University of Bozen-Bolzano, 39100 Bolzano, Italy; (A.K.M.S.I.); (A.D.); (B.S.); (P.L.); (L.P.)
- Department of Nutrition and Food Engineering, Daffodil International University, Dhaka 1207, Bangladesh
| | - Martina Aurora Costa Angeli
- Sensing Technologies Laboratory, Faculty of Science and Technology, Free University of Bozen-Bolzano, 39100 Bolzano, Italy; (A.K.M.S.I.); (A.D.); (B.S.); (P.L.); (L.P.)
- Correspondence:
| | - Ali Douaki
- Sensing Technologies Laboratory, Faculty of Science and Technology, Free University of Bozen-Bolzano, 39100 Bolzano, Italy; (A.K.M.S.I.); (A.D.); (B.S.); (P.L.); (L.P.)
| | - Bajramshahe Shkodra
- Sensing Technologies Laboratory, Faculty of Science and Technology, Free University of Bozen-Bolzano, 39100 Bolzano, Italy; (A.K.M.S.I.); (A.D.); (B.S.); (P.L.); (L.P.)
| | - Paolo Lugli
- Sensing Technologies Laboratory, Faculty of Science and Technology, Free University of Bozen-Bolzano, 39100 Bolzano, Italy; (A.K.M.S.I.); (A.D.); (B.S.); (P.L.); (L.P.)
| | - Luisa Petti
- Sensing Technologies Laboratory, Faculty of Science and Technology, Free University of Bozen-Bolzano, 39100 Bolzano, Italy; (A.K.M.S.I.); (A.D.); (B.S.); (P.L.); (L.P.)
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Chibh S, Kaur K, Gautam UK, Panda JJ. Dimension switchable auto-fluorescent peptide-based 1D and 2D nano-assemblies and their self-influence on intracellular fate and drug delivery. NANOSCALE 2022; 14:715-735. [PMID: 34937079 DOI: 10.1039/d1nr06768k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The production of dynamic, environment-responsive shape-tunable biomaterials marks a significant step forward in the construction of synthetic materials that can easily rival their natural counterparts. Significant progress has been made in the self-assembly of bio-materials. However, the self-assembly of a peptide into morphologically distinct auto-fluorescent nanostructures, without the incorporation of any external moiety is still in its infancy. Hence, in this study, we have developed peptide-based self-assembled auto-fluorescent nanostructures that can shuttle between 1D and 2D morphologies. Different morphological nanostructures are well known to have varied cellular internalization efficiencies. Taking advantage of our morphologically different particles emanating from the same peptide monomer, we further explored the intracellular fate of our nanostructures. We observed that the nanostructures' cellular internalization is a complex process that gets influenced by particle morphology and this might further affect their intracellular drug delivery potential. Overall, this study provides initial cues for the preparation of environment-responsive shape-shifting peptide-nano assemblies. Efforts have also been made to understand their shape driven cellular uptake behaviour, along with establishing them as nanocarriers for the cellular delivery of therapeutic molecules.
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Affiliation(s)
- Sonika Chibh
- Institute of Nano Science and Technology, Sector 81, Mohali, Punjab, 140306, India.
| | - Komalpreet Kaur
- Indian Institute of Science Education and Research, Sector 81, Mohali, Punjab, 140306, India
| | - Ujjal K Gautam
- Indian Institute of Science Education and Research, Sector 81, Mohali, Punjab, 140306, India
| | - Jiban Jyoti Panda
- Institute of Nano Science and Technology, Sector 81, Mohali, Punjab, 140306, India.
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Ahmed S, Baijal G, Somashekar R, Iyer S, Nayak V. One Pot Synthesis of PEGylated Bimetallic Gold-Silver Nanoparticles for Imaging and Radiosensitization of Oral Cancers. Int J Nanomedicine 2021; 16:7103-7121. [PMID: 34712044 PMCID: PMC8545617 DOI: 10.2147/ijn.s329762] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 10/04/2021] [Indexed: 12/11/2022] Open
Abstract
Background Radiotherapy is an important treatment modality for many types of head and neck squamous cell carcinomas. Nanomaterials comprised of high atomic number (Z) elements are novel radiosensitizers enhance radiation injury by production of free radicals and subsequent DNA damage. Gold nanoparticles are upcoming as promising radiosensitizers due to their high (Z) biocompatibility, and ease for surface engineering. Bimetallic nanoparticles have shown enhanced anticancer activity compared to monometallic nanoparticles. Materials and Methods PEG-coated Au–Ag alloy nanoparticles (BNPs) were synthesized using facile one pot synthesis techniques. Size of ~50±5nm measured by dynamic light scattering. Morphology, structural composition and elemental mapping were analyzed by electron microscopy and SAXS (small-angle X-ray scattering). The radiosensitization effects on KB oral cancer cells were evaluated by irradiation with 6MV X-rays on linear accelerator. Nuclear damage was imaged using confocal microscopy staining cells with Hoechst stain. Computed tomography (CT) contrast enhancement of BNPs was compared to that of the clinically used agent, Omnipaque. Results BNPs were synthesized using PEG 600 as reducing and stabilizing agent. The surface charge of well dispersed colloidal BNPs solution was −5mV. Electron microscopy reveals spherical morphology. HAADF-STEM and elemental mapping studies showed that the constituent metals were Au and Ag intermixed nanoalloy. Hydrodynamic diameter was ~50±5nm due to PEG layer and water molecules absorption. SAXS measurement confirmed BNPs size around 35nm. Raman shift of around 20 cm−1 was observed when BNPs were coated with PEG. 1H NMR showed extended involvement of −OH in synthesis. BNPs efficiently enter cytoplasm of KB cells and demonstrated potent in vitro radiosensitization with enhancement ratio ~1.5–1.7. Imaging Hoechst-stained nuclei demonstrated apoptosis in a dose-dependent manner. BNPs exhibit better CT contrast enhancement ability compared to Omnipaque. Conclusion This bimetallic intermix nanoparticles could serve a dual function as radiosensitizer and CT contrast agent against oral cancers, and by extension possibly other cancers as well.
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Affiliation(s)
- Shameer Ahmed
- Department of Biological Sciences, Birla Institute of Technology & Science, Pilani, K.K. Birla Goa Campus, Sancoale, Goa, India
| | - Gunjan Baijal
- Department of Radiation Oncology, Manipal Hospital Goa, Panaji, Goa, India
| | - Rudrappa Somashekar
- Centre for Materials Science and Technology, Vijnana Bhavan, Mysore, Karnataka, India
| | - Subramania Iyer
- Department of Head and Neck Oncology, Amrita Institute of Medical Sciences, Ponekkara, Cochin, India
| | - Vijayashree Nayak
- Department of Biological Sciences, Birla Institute of Technology & Science, Pilani, K.K. Birla Goa Campus, Sancoale, Goa, India
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Hosseini S, Wetzel O, Kostka K, Heggen M, Loza K, Epple M. Pathways for Oral and Rectal Delivery of Gold Nanoparticles (1.7 nm) and Gold Nanoclusters into the Colon: Enteric-Coated Capsules and Suppositories. Molecules 2021; 26:5069. [PMID: 34443657 PMCID: PMC8401122 DOI: 10.3390/molecules26165069] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/09/2021] [Accepted: 08/19/2021] [Indexed: 12/26/2022] Open
Abstract
Two ways to deliver ultrasmall gold nanoparticles and gold-bovine serum albumin (BSA) nanoclusters to the colon were developed. First, oral administration is possible by incorporation into gelatin capsules that were coated with an enteric polymer. These permit the transfer across the stomach whose acidic environment damages many drugs. The enteric coating dissolves due to the neutral pH of the colon and releases the capsule's cargo. Second, rectal administration is possible by incorporation into hard-fat suppositories that melt in the colon and then release the nanocarriers. The feasibility of the two concepts was demonstrated by in-vitro release studies and cell culture studies that showed the easy redispersibility after dissolution of the respective transport system. This clears a pathway for therapeutic applications of drug-loaded nanoparticles to address colon diseases, such as chronic inflammation and cancer.
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Affiliation(s)
- Shabnam Hosseini
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (S.H.); (O.W.); (K.K.); (K.L.)
| | - Oliver Wetzel
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (S.H.); (O.W.); (K.K.); (K.L.)
| | - Kathrin Kostka
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (S.H.); (O.W.); (K.K.); (K.L.)
| | - Marc Heggen
- Ernst Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany;
| | - Kateryna Loza
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (S.H.); (O.W.); (K.K.); (K.L.)
| | - Matthias Epple
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (S.H.); (O.W.); (K.K.); (K.L.)
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Wetzel O, Hosseini S, Loza K, Heggen M, Prymak O, Bayer P, Beuck C, Schaller T, Niemeyer F, Weidenthaler C, Epple M. Metal-Ligand Interface and Internal Structure of Ultrasmall Silver Nanoparticles (2 nm). J Phys Chem B 2021; 125:5645-5659. [PMID: 34029093 DOI: 10.1021/acs.jpcb.1c02512] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Ultrasmall silver nanoparticles were prepared by reduction with NaBH4 and surface-terminated with glutathione (GSH). The particles had a solid core diameter of 2 nm as shown by transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS). NMR-DOSY gave a hydrodynamic diameter of 2 to 2.8 nm. X-ray photoelectron spectroscopy (XPS) showed that silver is bound to the thiol group of the central cysteine in glutathione under partial oxidation to silver(+I). In turn, the thiol group is deprotonated to thiolate. X-ray powder diffraction (XRD) together with Rietveld refinement confirmed a twinned (polycrystalline) fcc structure of ultrasmall silver nanoparticles with a lattice compression of about 0.9% compared to bulk silver metal. By NMR spectroscopy, the interaction between the glutathione ligand and the silver surface was analyzed, also with 13C-labeled glutathione. The adsorbed glutathione is fully intact and binds to the silver surface via cysteine. In situ 1H NMR spectroscopy up to 85 °C in dispersion showed that the glutathione ligand did not detach from the surface of the silver nanoparticle, i.e. the silver-sulfur bond is remarkably strong. The ultrasmall nanoparticles had a higher cytotoxicity than bigger particles in in vitro cell culture with HeLa cells with a cytotoxic concentration of about 1 μg mL-1 after 24 h incubation. The overall stoichiometry of the nanoparticles was about Ag∼250GSH∼155.
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Affiliation(s)
- Oliver Wetzel
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
| | - Shabnam Hosseini
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
| | - Marc Heggen
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
| | - Peter Bayer
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, 45117 Essen, Germany
| | - Christine Beuck
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, 45117 Essen, Germany
| | - Torsten Schaller
- Organic Chemistry, University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
| | - Felix Niemeyer
- Organic Chemistry, University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
| | - Claudia Weidenthaler
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
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Taati Yengejeh F, Shabani Shayeh J, Rahmandoust M, Fatemi F, Arjmand S. A highly-sensitive vascular endothelial growth factor-A(165) immunosensor, as a tool for early detection of cancer. J Biomed Mater Res B Appl Biomater 2021; 109:1505-1511. [PMID: 33491278 DOI: 10.1002/jbm.b.34809] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 01/12/2021] [Accepted: 01/14/2021] [Indexed: 01/27/2023]
Abstract
Biomarkers can be ideal indicators for assessing the risk of the presence of a disease. In this study, a label-free electrochemical biosensor was designed to quantify the vascular endothelial growth factor A (165) (VEGF-A(165)) antigen, using reduced graphene oxide-gold nanoparticle for early detection of breast cancer. The conductivity of gold nanoparticle along with its biocompatibility provide an enhanced surface, suitable for anti-VEGF antibody immobilization. 11-mercaptoundecanoic acid was used to facilitate a single-step and convenient bonding of the antibodies to the surface, compared to previous studies. The dynamic range of the biosensor was between 20 to 120 pg/ml and its limit of detection of the biomarker VEGF-A(165) was obtained to be about 0.007 pg/ml, using different electric signal transduction modes. Hence, the biosensor is a beneficial immunosensor with high sensitivity and ideal dynamic range for early-stage diagnosis of breast cancer and other cancers diseases associated with expression of VEGF-A(165). The as-prepared immunosensor could be efficiently employed for designing a point-of-care diagnostic platform.
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Affiliation(s)
| | | | | | - Fattaneh Fatemi
- Protein Research Center, Shahid Beheshti University, Tehran, Iran
| | - Sareh Arjmand
- Protein Research Center, Shahid Beheshti University, Tehran, Iran
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Wey K, Epple M. Ultrasmall gold and silver/gold nanoparticles (2 nm) as autofluorescent labels for poly(D,L-lactide-co-glycolide) nanoparticles (140 nm). JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:117. [PMID: 33247365 PMCID: PMC7695662 DOI: 10.1007/s10856-020-06449-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Ultrasmall metallic nanoparticles show an efficient autofluorescence after excitation in the UV region, combined with a low degree of fluorescent bleaching. Thus, they can be used as fluorescent labels for polymer nanoparticles which are frequently used for drug delivery. A versatile water-in-oil-in-water emulsion-evaporation method was developed to load poly(D,L-lactide-co-glycolide) (PLGA) nanoparticles with autofluorescent ultrasmall gold and silver/gold nanoparticles (diameter 2 nm). The metallic nanoparticles were prepared by reduction of tetrachloroauric acid with sodium borohydride and colloidally stabilised with 11-mercaptoundecanoic acid. They were characterised by UV-Vis and fluorescence spectroscopy, showing a large Stokes shift of about 370 nm with excitation maxima at 250/270 nm and emission maxima at 620/640 nm for gold and silver/gold nanoparticles, respectively. The labelled PLGA nanoparticles (140 nm) were characterised by dynamic light scattering (DLS), scanning electron microscopy (SEM), and UV-Vis and fluorescence spectroscopy. Their uptake by HeLa cells was followed by confocal laser scanning microscopy. The metallic nanoparticles remained inside the PLGA particle after cellular uptake, demonstrating the efficient encapsulation and the applicability to label the polymer nanoparticle. In terms of fluorescence, the metallic nanoparticles were comparable to fluorescein isothiocyanate (FITC).
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Affiliation(s)
- Karolin Wey
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117, Essen, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117, Essen, Germany.
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11
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One-step chemical synthesis of Ag–Au alloy nanoparticles for modulating the catalytic hydrogenation reaction. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01523-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Garcia PRAF, Prymak O, Grasmik V, Pappert K, Wlysses W, Otubo L, Epple M, Oliveira CLP. An in situ SAXS investigation of the formation of silver nanoparticles and bimetallic silver-gold nanoparticles in controlled wet-chemical reduction synthesis. NANOSCALE ADVANCES 2020; 2:225-238. [PMID: 36133991 PMCID: PMC9418936 DOI: 10.1039/c9na00569b] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 11/11/2019] [Indexed: 05/22/2023]
Abstract
We present a study on the formation of silver (Ag) and bimetallic silver-gold (AgAu) nanoparticles monitored by in situ SAXS as well as by ex situ TEM, XRD and UV-vis analysis in a flow reactor at controlled reaction temperature. The formation mechanism of the nanoparticles is derived from the structural parameters obtained from the experimental data. The evolution of the average particle size of pure and alloyed nanoparticles shows that the particle growth occurs initially by a coalescence mechanism. The later growth of pure silver nanoparticles is well described by Ostwald ripening and for the alloyed nanoparticles by a process with a significantly slower growth rate. Additionally, the SAXS data of pure silver nanoparticles revealed two major populations of nanoparticles, the first one with a continuous crystal growth to a saturation plateau, and the second one probably with a continuous emergence of small new crystals. The particle sizes obtained by SAXS agree well with the results from transmission electron microscopy and X-ray diffraction. The present study demonstrates the capability of an in situ investigation of synthesis processes using a laboratory based SAXS instrument. Online monitoring of the synthesis permitted a detailed investigation of the structural evolution of the system.
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Affiliation(s)
- Paulo R A F Garcia
- Institute of Physics, University of São Paulo Rua do Matão 1371 São Paulo 05508-090 Brazil
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen Universitaetsstr. 5-7 45117 Essen Germany
| | - Viktoria Grasmik
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen Universitaetsstr. 5-7 45117 Essen Germany
| | - Kevin Pappert
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen Universitaetsstr. 5-7 45117 Essen Germany
| | - Wagner Wlysses
- Institute of Physics, University of São Paulo Rua do Matão 1371 São Paulo 05508-090 Brazil
| | - Larissa Otubo
- Laboratório de Microscopia e Microanálises (LMM), Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP 05508-000 São Paulo - SP Brazil
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen Universitaetsstr. 5-7 45117 Essen Germany
| | - Cristiano L P Oliveira
- Institute of Physics, University of São Paulo Rua do Matão 1371 São Paulo 05508-090 Brazil
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Sudheeshkumar V, Alyari M, Gangishetty M, Scott RWJ. Galvanic synthesis of AgPd bimetallic catalysts from Ag clusters dispersed in a silica matrix. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01675f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
AgPd bimetallic clusters dispersed in a silica matrix were made by a top down synthetic strategy and used as selective hydrogenation catalysts.
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Affiliation(s)
- V. Sudheeshkumar
- 110 Science Place
- Department of Chemistry
- University of Saskatchewan
- Canada
| | - Maryam Alyari
- 110 Science Place
- Department of Chemistry
- University of Saskatchewan
- Canada
| | | | - Robert W. J. Scott
- 110 Science Place
- Department of Chemistry
- University of Saskatchewan
- Canada
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Phull AR, Ali A, Ali A, Abbasi S, Zia M, Khaskheli MH, Haq IU, Kamal MA. Synthesis of Silver Nanoparticles using Euphorbia wallichii Extract and Assessment of their Bio-functionalities. Med Chem 2019; 16:495-506. [PMID: 31713490 DOI: 10.2174/1573406415666191111143213] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 10/13/2019] [Accepted: 10/24/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Silver nanoparticles synthesized by the bio-green method have been applied to various biomedical applications. These procedures are simple, eco-friendly and serve as an alternative to complex chemical methods for the preparation of nanomaterials. OBJECTIVE In the present study, phytosynthesis of silver nanoparticles, to examine their antioxidant potential, toxic effects towards bacterial-, fungal-strains, brine shrimp nauplii and cancer cells was focused. METHODS Methanolic extract of Euphorbia wallichii roots was used for the synthesis of silver nanoparticles. The synthesis was monitored and confirmed by UV-visible spectroscopy, Fourier Transform Infra-Red (FTIR) spectrometric analysis, Field Emission Scanning Electron Microscope (FESEM), Energy Dispersive X-ray (EDX) and X-Ray Powder Diffraction (XRD). RESULTS The synthesized particles were average 63±8 nm in size. Involvement of phenolic (46.7±2.4 µg GAE/mg) and flavonoid (11.7±1.2 µg QE/mg) compounds as capping agents was also measured. Nanoparticles showed antioxidant properties in terms of free radical scavenging potential (59.63±1.0 %), reducing power (44.52±1.34 µg AAE/mg) and total antioxidant capacity (60.48±2.2 µg AAE/mg). The nanoparticles showed potent cytotoxic effects against brine shrimp nauplii (LD50 66.83 µg/ml), proliferation and cell death of HeLa cells as determined by MTT (LD50 0.3923 µg/ml) and TUNEL assays, respectively. Antimicrobial results revealed that silver nanoparticles were found to be more potent against pathogenic fungal (maximum active against A. fumigatus, MIC 15 µg/disc) and bacterial strains (maximum active against S. aureus, MIC 3.33 μg/disc) than the E. wallichii extract alone. CONCLUSION These results support the advantages of using an eco-friendly and cost-effective method for synthesis of nanoparticles with antioxidant, cytotoxic and antimicrobial potential.
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Affiliation(s)
- Abdul-Rehman Phull
- Department of Biochemistry, Shah Abdul Latif University, Khairpur, Sindh 66020, Pakistan
| | - Attarad Ali
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Akhtar Ali
- Department of Biochemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Sanaullah Abbasi
- Department of Biochemistry, Shah Abdul Latif University, Khairpur, Sindh 66020, Pakistan
| | - Muhammad Zia
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Muhammad H Khaskheli
- Department of Biochemistry, Shah Abdul Latif University, Khairpur, Sindh 66020, Pakistan
| | - Ihsan Ul Haq
- Department of Pharmacy, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Mohammad A Kamal
- King Fahd Medical Research Center, King Abdulaziz University, P.O. Box 80216, Jeddah 21589, Saudi Arabia.,Enzymoics, 7 Peterlee Place, Hebersham, NSW 2770, Australia.,Novel Global Community Educational Foundation, Australia
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Ahmed HB, Emam HE. Synergistic catalysis of monometallic (Ag, Au, Pd) and bimetallic (Ag Au, Au Pd) versus trimetallic (Ag-Au-Pd) nanostructures effloresced via analogical techniques. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.110975] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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van der Meer SB, Loza K, Wey K, Heggen M, Beuck C, Bayer P, Epple M. Click Chemistry on the Surface of Ultrasmall Gold Nanoparticles (2 nm) for Covalent Ligand Attachment Followed by NMR Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7191-7204. [PMID: 31039607 DOI: 10.1021/acs.langmuir.9b00295] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Ultrasmall gold nanoparticles (core diameter 2 nm) were surface-conjugated with azide groups by attaching the azide-functionalized tripeptide lysine(N3)-cysteine-asparagine with ∼117 molecules on each nanoparticle. A covalent surface modification with alkyne-containing molecules was then possible by copper-catalyzed click chemistry. The successful clicking to the nanoparticle surface was demonstrated with 13C-labeled propargyl alcohol. All steps of the nanoparticle surface conjugation were verified by extensive NMR spectroscopy on dispersed nanoparticles. The particle diameter and the dispersion state were assessed by high-resolution transmission electron microscopy (HRTEM), differential centrifugal sedimentation (DCS), and 1H-DOSY NMR spectroscopy. The clicking of fluorescein (FAM-alkyne) gave strongly fluorescing ultrasmall nanoparticles that were traced inside eukaryotic cells. The uptake of these nanoparticles after 24 h by HeLa cells was very efficient and showed that the nanoparticles even penetrated the nuclear membrane to a very high degree (in contrast to dissolved FAM-alkyne alone that did not enter the cell). About 8 fluorescein molecules were clicked to each nanoparticle.
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Affiliation(s)
- Selina Beatrice van der Meer
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE) , University of Duisburg-Essen , Universitätsstr. 5-7 , 45117 Essen , Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE) , University of Duisburg-Essen , Universitätsstr. 5-7 , 45117 Essen , Germany
| | - Karolin Wey
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE) , University of Duisburg-Essen , Universitätsstr. 5-7 , 45117 Essen , Germany
| | - Marc Heggen
- Ernst Ruska-Center for Microscopy and Spectroscopy with Electrons , Forschungszentrum Jülich GmbH , 52425 Jülich , Germany
| | - Christine Beuck
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB) , University of Duisburg-Essen , 45117 Essen , Germany
| | - Peter Bayer
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB) , University of Duisburg-Essen , 45117 Essen , Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE) , University of Duisburg-Essen , Universitätsstr. 5-7 , 45117 Essen , Germany
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Ahmed HB, Attia MA, El-Dars FM, Emam HE. Hydroxyethyl cellulose for spontaneous synthesis of antipathogenic nanostructures: (Ag & Au) nanoparticles versus Ag-Au nano-alloy. Int J Biol Macromol 2019; 128:214-229. [DOI: 10.1016/j.ijbiomac.2019.01.093] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Revised: 01/17/2019] [Accepted: 01/20/2019] [Indexed: 11/27/2022]
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18
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Dependence of ultrafast dynamics in gold–silver alloy nanoclusters on the proportion of the metal content. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0473-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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19
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Kundu S, Mukherjee D, Maiti TK, Sarkar N. Highly Luminescent Thermoresponsive Green Emitting Gold Nanoclusters for Intracellular Nanothermometry and Cellular Imaging: A Dual Function Optical Probe. ACS APPLIED BIO MATERIALS 2019; 2:2078-2091. [DOI: 10.1021/acsabm.9b00107] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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20
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Ruks T, Beuck C, Schaller T, Niemeyer F, Zähres M, Loza K, Heggen M, Hagemann U, Mayer C, Bayer P, Epple M. Solution NMR Spectroscopy with Isotope-Labeled Cysteine ( 13C and 15N) Reveals the Surface Structure of l-Cysteine-Coated Ultrasmall Gold Nanoparticles (1.8 nm). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:767-778. [PMID: 30576151 DOI: 10.1021/acs.langmuir.8b03840] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Ultrasmall gold nanoparticles with a diameter of 1.8 nm were synthesized by reduction of tetrachloroauric acid with sodium borohydride in the presence of l-cysteine, with natural isotope abundance as well as 13C-labeled and 15N-labeled. The particle diameter was determined by high-resolution transmission electron microscopy and differential centrifugal sedimentation. X-ray photoelectron spectroscopy confirmed the presence of metallic gold with only a few percent of oxidized Au(+I) species. The surface structure and the coordination environment of the cysteine ligands on the ultrasmall gold nanoparticles were studied by a variety of homo- and heteronuclear NMR spectroscopic techniques including 1H-13C-heteronuclear single-quantum coherence and 13C-13C-INADEQUATE. Further information on the binding situation (including the absence of residual or detached l-cysteine in the solution) and on the nanoparticle diameter (indicating the well-dispersed state) was obtained by diffusion-ordered spectroscopy (1H-, 13C-, and 1H-13C-DOSY). Three coordination environments of l-cysteine on the gold surface were identified that were ascribed to different crystallographic sites, supported by geometric considerations of the nanoparticle ultrastructure. The particle size data and the NMR-spectroscopic analysis gave a particle composition of about Au174(cysteine)67.
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Affiliation(s)
| | | | | | | | | | | | - Marc Heggen
- Ernst Ruska Centre for Microscopy and Spectroscopy with Electrons , Forschungszentrum Jülich GmbH , 52428 Jülich , Germany
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Ultrabright gold-silver bimetallic nanoclusters: synthesis and their potential application in cysteine sensing. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.07.038] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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22
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Jiang X, Du B, Huang Y, Zheng J. Ultrasmall Noble Metal Nanoparticles: Breakthroughs and Biomedical Implications. NANO TODAY 2018; 21:106-125. [PMID: 31327979 PMCID: PMC6640873 DOI: 10.1016/j.nantod.2018.06.006] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
As a bridge between individual atoms and large plasmonic nanoparticles, ultrasmall (core size <3 nm) noble metal nanoparticles (UNMNPs) have been serving as model for us to fundamentally understand many unique properties of noble metals that can only be observed at an extremely small size scale. With decades'efforts, many significant breakthroughs in the synthesis, characterization and functionalization of UNMNPs have laid down a solid foundation for their future applications in the healthcare. In this review, we aim to tightly correlate these breakthroughs with their biomedical applications and illustrate how to utilize these breakthroughs to address long-standing challenges in the clinical translation of nanomedicines. In the end, we offer our perspective on the remaining challenges and opportunities at the frontier of biomedical-related UNMNPs research.
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Affiliation(s)
- Xingya Jiang
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, USA
| | - Bujie Du
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, USA
| | - Yingyu Huang
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, USA
| | - Jie Zheng
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, USA
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Mishra SK, Kannan S. Doxorubicin-Conjugated Bimetallic Silver–Gadolinium Nanoalloy for Multimodal MRI-CT-Optical Imaging and pH-Responsive Drug Release. ACS Biomater Sci Eng 2017; 3:3607-3619. [DOI: 10.1021/acsbiomaterials.7b00498] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sandeep K. Mishra
- Centre for Nanoscience and Technology, Pondicherry University, R. V. Nagar, Kalapet, Puducherry 605 014, India
| | - S. Kannan
- Centre for Nanoscience and Technology, Pondicherry University, R. V. Nagar, Kalapet, Puducherry 605 014, India
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24
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Mishra SK, Kannan S. A Bimetallic Silver-Neodymium Theranostic Nanoparticle with Multimodal NIR/MRI/CT Imaging and Combined Chemo-photothermal Therapy. Inorg Chem 2017; 56:12054-12066. [PMID: 28933536 DOI: 10.1021/acs.inorgchem.7b02103] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
An engineered metallic nanostructure is an excellent candidate for "theranosis" of cancer, having intrinsic properties of multimodal imaging and therapy. Toward this target, the development of silver-neodymium bimetallic nanoparticles (Ag-Nd BNPs) via microwave-assisted polyol synthesis is presented. The resultant Ag-Nd BNPs exhibit good monodispersity with average size of 10 nm, fluorescence in the near-infrared (NIR) region, and magnetic properties. The Ag-Nd BNPs also validate MRI, CT, and NIR trimodal imaging ability and enunciate valuable temperature response upon irradiation under a NIR laser. Aided by chitosan functionalization on the surface, the Ag-Nd BNPs deliver good biocompatibility and also promote the loading of paclitaxel, an anticancer drug. Isothermal titration calorimetry affirms the combination of strong binding affinity of drug and high loading efficiency of 7 drug molecules per nanoparticle. Moreover, Ag-Nd BNPs also illustrate a highly efficient photothermal effect in PBS. Therefore, the synergistic effects of paclitaxel and the photothermal effect make BNPs excellent "combined therapeutic agents", and also give them the important ability to destroy cancer cells in vitro at very low dose in comparison to single therapy. Thus, the Ag-Nd BNPs unveil a combination of MRI/CT/NIR imaging and chemo-photothermal therapy that ensures accurate diagnosis at an early stage and comprehensive eradication of tumor cells without affecting healthy cells.
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Affiliation(s)
- Sandeep K Mishra
- Centre for Nanoscience and Technology, Pondicherry University , Puducherry 605 014, India
| | - S Kannan
- Centre for Nanoscience and Technology, Pondicherry University , Puducherry 605 014, India
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25
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Corpuz RD, Ishida Y, Nguyen MT, Yonezawa T. Synthesis of Positively Charged Photoluminescent Bimetallic Au-Ag Nanoclusters by Double-Target Sputtering Method on a Biocompatible Polymer Matrix. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9144-9150. [PMID: 28799769 DOI: 10.1021/acs.langmuir.7b02011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Herein, we report a novel positively charged photoluminescent Au-Ag bimetallic nanocluster synthesized using 11-mercaptoundecyl-N,N,N-trimethylammonium bromide as the capping ligand by means of "green" double-target sputtering method on a biocompatible polymer matrix. The photoluminescent Au-Ag bimetallic cluster showed emission tunability from blue to near infrared (NIR) regions with respect to change in the composition.
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Affiliation(s)
- Ryan D Corpuz
- Division of Material Science and Engineering, Faculty of Engineering, Hokkaido University , Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Yohei Ishida
- Division of Material Science and Engineering, Faculty of Engineering, Hokkaido University , Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Mai Thanh Nguyen
- Division of Material Science and Engineering, Faculty of Engineering, Hokkaido University , Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Tetsu Yonezawa
- Division of Material Science and Engineering, Faculty of Engineering, Hokkaido University , Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
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Santiago-Gonzalez B, Monguzzi A, Caputo M, Villa C, Prato M, Santambrogio C, Torrente Y, Meinardi F, Brovelli S. Metal Nanoclusters with Synergistically Engineered Optical and Buffering Activity of Intracellular Reactive Oxygen Species by Compositional and Supramolecular Design. Sci Rep 2017; 7:5976. [PMID: 28729689 PMCID: PMC5519591 DOI: 10.1038/s41598-017-05156-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 05/24/2017] [Indexed: 01/31/2023] Open
Abstract
Metal nanoclusters featuring tunable luminescence and high biocompatibility are receiving attention as fluorescent markers for cellular imaging. The recently discovered ability of gold clusters to scavenge cytotoxic reactive oxygen species (ROS) from the intracellular environment extends their applicability to biomedical theranostics and provides a novel platform for realizing multifunctional luminescent probes with engineered anti-cytotoxic activity for applications in bio-diagnostics and conceivably cellular therapy. This goal could be achieved by using clusters of strongly reactive metals such as silver, provided that strategies are found to enhance their luminescence while simultaneously enabling direct interaction between the metal atoms and the chemical surroundings. In this work, we demonstrate a synergic approach for realizing multifunctional metal clusters combining enhanced luminescence with strong and lasting ROS scavenging activity, based on the fabrication and in situ protection of Ag nanoclusters with a supramolecular mantle of thiolated-Au atoms (Ag/Au-t). Confocal imaging and viability measurements highlight the biocompatibility of Ag/Au-t and their suitability as fluorescent bio-markers. ROS concentration tests reveal the remarkable scavenging activity of Ag-based clusters. Proliferation tests of cells in artificially stressed culture conditions point out their prolonged anti-cytotoxic effect with respect to gold systems, ensuring positive cell proliferation rates even for long incubation time.
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Affiliation(s)
- B Santiago-Gonzalez
- Dipartimento di Scienza dei Materiali, Università degli Studi Milano-Bicocca, via R. Cozzi 55, 20125, Milano, Italy.
| | - A Monguzzi
- Dipartimento di Scienza dei Materiali, Università degli Studi Milano-Bicocca, via R. Cozzi 55, 20125, Milano, Italy
| | - M Caputo
- Dipartimento di Scienza dei Materiali, Università degli Studi Milano-Bicocca, via R. Cozzi 55, 20125, Milano, Italy
| | - C Villa
- Dipartimento di Patofisiologia e dei Trapianti, Università degli Studi di Milano, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Centro Dino Ferrari, Via Francesco Sforza 35, 20122, Milano, Italy
| | - M Prato
- Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - C Santambrogio
- Dipartimento di Biotecnologie e Bioscienze, Università degli Studi Milano-Bicocca Piazza della Scienza, 2 20126, Milano, Italy
| | - Y Torrente
- Dipartimento di Patofisiologia e dei Trapianti, Università degli Studi di Milano, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Centro Dino Ferrari, Via Francesco Sforza 35, 20122, Milano, Italy
| | - F Meinardi
- Dipartimento di Scienza dei Materiali, Università degli Studi Milano-Bicocca, via R. Cozzi 55, 20125, Milano, Italy
| | - S Brovelli
- Dipartimento di Scienza dei Materiali, Università degli Studi Milano-Bicocca, via R. Cozzi 55, 20125, Milano, Italy.
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Emam HE, El-Zawahry MM, Ahmed HB. One-pot fabrication of AgNPs, AuNPs and Ag-Au nano-alloy using cellulosic solid support for catalytic reduction application. Carbohydr Polym 2017; 166:1-13. [DOI: 10.1016/j.carbpol.2017.02.091] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 02/13/2017] [Accepted: 02/22/2017] [Indexed: 10/20/2022]
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siRNA delivery using polyelectrolyte-gold nanoassemblies in neuronal cells for BACE1 gene silencing. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 80:18-28. [PMID: 28866154 DOI: 10.1016/j.msec.2017.05.101] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 05/08/2017] [Accepted: 05/14/2017] [Indexed: 02/08/2023]
Abstract
Small interfering RNA (siRNA) mediated RNA interference is a versatile therapeutic tool for many intractable genetic disorders. Various nanoassemblies specifically designed to deliver the siRNAs could be utilized for efficient siRNA delivery which is one of the major concern for the success of this therapeutic. Thus, in the present study, polyelectrolyte-gold nanoassemblies (PE-Gold NAs) were selected for siRNA delivery of an in vitro verified siRNA. Three different polyelectrolytes (polyethyleneimine, citraconic anhydride modified poly (allylamine) hydrochloride and poly l-arginine) were used to formulate the PE-Gold NAs using the layer-by-layer technique. Successful physico-chemical characterizations of these PE-Gold NAs were performed using UV-Visible, FTIR, 1H-NMR spectroscopies, XRD, TEM, DLS and Zeta potential measurements. In vitro studies for the cytotoxicity, the uptake of these nanoassemblies and the gene silencing were carried out using these PE-Gold NAs in N2a and NB4 1A3 (murine neuronal) cell lines. The three selected PE-Gold NAs showed significant BACE1 (β-site APP cleaving enzyme 1) gene silencing (50-60%). This work demonstrates the potential of PE-Gold NAs to deliver siRNA targeting BACE1 in neuronal cells. Finally, it was concluded that different polyelectrolytes used in the PE-Gold NAs achieve different gene silencing due to the variation in their delivery efficiencies.
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Cui Y, Yang J, Zhou Q, Liang P, Wang Y, Gao X, Wang Y. Renal Clearable Ag Nanodots for in Vivo Computer Tomography Imaging and Photothermal Therapy. ACS APPLIED MATERIALS & INTERFACES 2017; 9:5900-5906. [PMID: 28111943 DOI: 10.1021/acsami.6b16133] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Albumin-stabilized Ag nanodots (ANDs) are prepared by a one-step biomineralization method. The highly crystallized nanodots have ultrasmall sizes (approximately 5.8 nm) and robust X-ray attenuation (5.7313 HU per mM Ag). The unlabeled ANDs are directly excreted from the body via the urine after in vivo X-ray computer tomography (CT) imaging application. ANDs could be used as CT imaging agents and effective photothermal therapy agents. Tumor growth inhibition reaches 90.2% after photothermal treatment with ANDs. ANDs are promising tools for in vivo CT imaging and clearable near-infrared-triggered theranostic agents.
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Affiliation(s)
- Yanyan Cui
- Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optoelectronics, Beijing Institute of Technology , Beijing 100081, China
| | - Jian Yang
- Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optoelectronics, Beijing Institute of Technology , Beijing 100081, China
| | - Qunfang Zhou
- Department of Interventional Ultrasound, Chinese PLA General Hospital , Beijing 100853, China
| | - Ping Liang
- Department of Interventional Ultrasound, Chinese PLA General Hospital , Beijing 100853, China
| | - Yaling Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
| | - Xueyun Gao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
| | - Yongtian Wang
- Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optoelectronics, Beijing Institute of Technology , Beijing 100081, China
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30
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Mishra SK, Kannan S. Microwave Synthesis of Chitosan Capped Silver-Dysprosium Bimetallic Nanoparticles: A Potential Nanotheranosis Device. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:13687-13696. [PMID: 27981845 DOI: 10.1021/acs.langmuir.6b03438] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Accurate imaging of the structural and functional state of biological targets is a critical task. To amend paucities associated with individual imaging, there is high interest to develop a multifunctional theranostic devices for cancer diagnosis and therapy. Herein, chitosan coated silver/dysprosium bimetallic nanoparticles (BNPs) were synthesized through a green chemistry route and characterization results inferred that the BNPs are crystalline, spherical, and of size ∼10 nm. High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and X-ray photoelectron spectroscopy (XPS) confirm the reduced metallic states of Ag and Dy in nanoparticles. These BNPs demonstrate high emission in a second near-infrared (NIR-II, 1000-1400 nm) biological window on excitation at 808 nm. Moreover, magnetization and magnetic resonance imaging (MRI) studies perceive the inherent paramagnetic features of Dy component that displays dark T2 contrast and high relaxivity. Due to high X-ray attenuation effect, BNPs exhibit better Hounsfield unit (HU) value than the reported contrast agents. BNPs unveil good biocompatibility and also express sturdy therapeutic effect in HeLa cells when tethered with doxorubicin.
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Affiliation(s)
- Sandeep K Mishra
- Centre for Nanoscience and Technology, Pondicherry University , Puducherry-605 014, India
| | - S Kannan
- Centre for Nanoscience and Technology, Pondicherry University , Puducherry-605 014, India
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31
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Dutta D, Chattopadhyay A, Ghosh SS. Cationic BSA Templated Au–Ag Bimetallic Nanoclusters As a Theranostic Gene Delivery Vector for HeLa Cancer Cells. ACS Biomater Sci Eng 2016; 2:2090-2098. [DOI: 10.1021/acsbiomaterials.6b00517] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Deepanjalee Dutta
- Centre for Nanotechnology, ‡Department of Chemistry, §Department of Biosciences
and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Arun Chattopadhyay
- Centre for Nanotechnology, ‡Department of Chemistry, §Department of Biosciences
and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Siddhartha Sankar Ghosh
- Centre for Nanotechnology, ‡Department of Chemistry, §Department of Biosciences
and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
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32
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Roland S, Ling X, Pileni MP. N-Heterocyclic Carbene Ligands for Au Nanocrystal Stabilization and Three-Dimensional Self-Assembly. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:7683-96. [PMID: 27412075 PMCID: PMC4980691 DOI: 10.1021/acs.langmuir.6b01458] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 07/13/2016] [Indexed: 05/19/2023]
Abstract
N-Heterocyclic carbenes (NHCs) have emerged as a new class of ligands for materials chemistry that appears particularly relevant for the stabilization and functionalization of metal nanoparticles (NPs). The particular properties and high synthetic flexibility of NHCs make them highly attractive tools for the development of new (nano)materials and the fundamental study of their properties. The relationships between the NHC structure and NP structure/properties, including physical, biological, and self-assembly properties, remain largely unknown. In the past decade, many efforts have been made to gain more fundamental understanding in this area. In this feature article, we present our contribution in this field focusing on the formation of NHC-coated Au nanocrystals (NCs), their stability, and their ability to self-assemble into 3D crystalline structures called supracrystals. First, the formation of NHC-stabilized Au NCs is discussed by comparing different NHC structures, NHC-based Au precursors, and synthesis methods. This study shows the major role of the NHC structure in obtaining both stable NHC-coated Au NCs and narrow size distributions. In a second part, a comparative study of the oxygen resistance of NHC- and thiol-coated NCs is presented, demonstrating the enhanced stability of NHC-coated Au NCs to oxygen-based treatments. Finally, the self-assembly of NHC-coated Au NCs into 3D Au superlattices is presented. The formation of large organized domains of several micrometers is described from the design of NHCs tailored with long alkyl chains. In these different contexts, efforts have been made to gain a more in-depth understanding of the behavior of NHC ligands at the surface of NCs. These results show that the NHC-based approach to nanomaterials has many assets for opening a new research area in the supracrystal world.
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Affiliation(s)
- Sylvain Roland
- Institut Parisien
de Chimie Moléculaire, Sorbonne Universités,
UPMC-Univ Paris 6, UMR CNRS 8232, F-75005 Paris, France
| | - Xiang Ling
- Institut Parisien
de Chimie Moléculaire, Sorbonne Universités,
UPMC-Univ Paris 6, UMR CNRS 8232, F-75005 Paris, France
- MONARIS,Sorbonne Universités, UPMC-Univ Paris 6, UMR CNRS 8233, F-75005 Paris, France
| | - Marie-Paule Pileni
- MONARIS,Sorbonne Universités, UPMC-Univ Paris 6, UMR CNRS 8233, F-75005 Paris, France
- CEA/IRAMIS, CEA
Saclay, 91191 Gif-Sur-Yvette, France
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33
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Ganguly M, Jana J, Pal A, Pal T. Synergism of gold and silver invites enhanced fluorescence for practical applications. RSC Adv 2016. [DOI: 10.1039/c5ra26430h] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Synergism of gold and silver improves fluorescence behavior of gold–silver bimetallic clusters with practical applications.
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Affiliation(s)
| | - Jayasmita Jana
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Anjali Pal
- Department of Civil Engineering
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Tarasankar Pal
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
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34
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Dutta D, Sahoo AK, Chattopadhyay A, Ghosh SS. Bimetallic silver nanoparticle–gold nanocluster embedded composite nanoparticles for cancer theranostics. J Mater Chem B 2016; 4:793-800. [DOI: 10.1039/c5tb01583a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A bimetallic silver nanoparticle based gold nanocluster module has been developed for theranostic cellular application by a rapid and simple galvanic exchange method.
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Affiliation(s)
- Deepanjalee Dutta
- Centre for Nanotechnology
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
| | - Amaresh Kumar Sahoo
- Centre for Nanotechnology
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
| | - Arun Chattopadhyay
- Centre for Nanotechnology
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
- Department of Chemistry
| | - Siddhartha Sankar Ghosh
- Centre for Nanotechnology
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
- Department of Biosciences and Bioengineering
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35
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Schuetze B, Mayer C, Loza K, Gocyla M, Heggen M, Epple M. Conjugation of thiol-terminated molecules to ultrasmall 2 nm-gold nanoparticles leads to remarkably complex 1H-NMR spectra. J Mater Chem B 2016; 4:2179-2189. [DOI: 10.1039/c5tb02443a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gold nanoparticles, functionalized by aliphatic and aromatic mercapto-functionalized carboxylic acids and by two small peptides (CG and CGGRGD), respectively, were synthesized by the reduction of HAuCl4 with NaBH4 in the presence of the above ligands.
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Affiliation(s)
- Benjamin Schuetze
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- 45117 Essen
- Germany
| | - Christian Mayer
- Physical Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- 45117 Essen
- Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- 45117 Essen
- Germany
| | - Martin Gocyla
- Ernst Ruska-Center and Peter Gruenberg Institute
- Forschungszentrum Juelich GmbH
- 52425 Juelich
- Germany
| | - M. Heggen
- Ernst Ruska-Center and Peter Gruenberg Institute
- Forschungszentrum Juelich GmbH
- 52425 Juelich
- Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- 45117 Essen
- Germany
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36
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Ling X, Schaeffer N, Roland S, Pileni MP. Superior Oxygen Stability of N-Heterocyclic Carbene-Coated Au Nanocrystals: Comparison with Dodecanethiol. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:12873-82. [PMID: 26550843 DOI: 10.1021/acs.langmuir.5b02185] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The stability of Au nanocrystals (NCs) coated with different N-heterocyclic carbenes (NHCs) or dodecanethiol (DDT) to oxygen-based treatments was investigated. A dominant effect of the ligand type was observed with a significantly greater oxygen resistance of NHC-coated Au NCs compared to that of the thiol-based analogues. NHC-coated Au NCs are stable to 10 W oxygen plasma etching for up to 180 s whereas the integrity of DDT-coated Au NCs is strongly affected by the same treatment from 60-80 s. In the latter case, the average size of the NCs (from 2.6 to 6.3 nm) and the method of synthesis have no effect on the stability. NHC-coated Au NCs were found to generate of a smaller quantity of ligand-derived species under molecular oxygen treatment, which could account for the increased stability.
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Affiliation(s)
- Xiang Ling
- Sorbonne Universités , UPMC-Univ Paris 6, UMR 8233, MONARIS, F-75005 Paris, France
- CNRS, UMR 8233, MONARIS, F-75005 Paris, France
- Sorbonne Universités , UPMC-Univ Paris 6, UMR 8232, Institut Parisien de Chimie Moléculaire, F-75005 Paris, France
| | - Nicolas Schaeffer
- Sorbonne Universités , UPMC-Univ Paris 6, UMR 8233, MONARIS, F-75005 Paris, France
- CNRS, UMR 8233, MONARIS, F-75005 Paris, France
| | - Sylvain Roland
- Sorbonne Universités , UPMC-Univ Paris 6, UMR 8232, Institut Parisien de Chimie Moléculaire, F-75005 Paris, France
| | - Marie-Paule Pileni
- Sorbonne Universités , UPMC-Univ Paris 6, UMR 8233, MONARIS, F-75005 Paris, France
- CNRS, UMR 8233, MONARIS, F-75005 Paris, France
- CEA/IRAMIS, CEA Saclay, 91191 Gif-Sur-Yvette, France
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37
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Ristig S, Chernousova S, Meyer-Zaika W, Epple M. Synthesis, characterization and in vitro effects of 7 nm alloyed silver-gold nanoparticles. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2015; 6:1212-1220. [PMID: 26171298 PMCID: PMC4464341 DOI: 10.3762/bjnano.6.124] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 05/08/2015] [Indexed: 05/30/2023]
Abstract
Alloyed silver-gold nanoparticles were prepared in nine different metal compositions with silver/gold molar ratios of ranging from 90:10 to 10:90. The one-pot synthesis in aqueous medium can easily be modified to gain control over the final particle diameter and the stabilizing agents. The purification of the particles to remove synthesis by-products (which is an important factor for subsequent in vitro experiments) was carried out by multiple ultracentrifugation steps. Characterization by transmission electron microscopy (TEM), differential centrifugal sedimentation (DCS), dynamic light scattering (DLS), UV-vis spectroscopy and atomic absorption spectroscopy (AAS) showed spherical, monodisperse, colloidally stable silver-gold nanoparticles of ≈7 nm diameter with measured molar metal compositions very close to the theoretical values. The examination of the nanoparticle cytotoxicity towards HeLa cells and human mesenchymal stem cells (hMSCs) showed that the toxicity is not proportional to the silver content. Nanoparticles with a silver/gold molar composition of 80:20 showed the highest toxicity.
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Affiliation(s)
- Simon Ristig
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, 45117 Essen, Germany
| | - Svitlana Chernousova
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, 45117 Essen, Germany
| | - Wolfgang Meyer-Zaika
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, 45117 Essen, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, 45117 Essen, Germany
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