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Elsayed SA, Elnabky IM, Aboelnga MM, El-Hendawy AM. Palladium(ii), platinum(ii), and silver(i) complexes with 3-acetylcoumarin benzoylhydrazone Schiff base: Synthesis, characterization, biomolecular interactions, cytotoxic activity, and computational studies. RSC Adv 2024; 14:19512-19527. [PMID: 38895519 PMCID: PMC11184370 DOI: 10.1039/d4ra02738h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Accepted: 06/02/2024] [Indexed: 06/21/2024] Open
Abstract
New Pd(ii) (C1), Pt(ii) (C2), and Ag(i) (C3) complexes derived from 3-acetylcoumarin benzoylhydrazone (HL) Schiff base were synthesized and characterized by FTIR, 1H NMR, UV-visible spectroscopies along with elemental analysis (C, H, N), magnetic, molar conductivity measurements, and DFT calculations. The obtained results suggested that the ligand had different behaviors in the complexes: mono-negative tridentate (C1) and neutral tridentate (C2) as an ONO-donor and neutral bidentate (C3) as an ON-donor. Quantum chemistry calculations were performed to validate the stability of the suggested geometries and indicated that all the complexes possess tetra-coordinated metal ions. The binding affinity of all the compounds toward calf thymus (ctDNA), yeast (tRNA), and bovine serum albumin (BSA) was evaluated by absorption/emission spectral titration studies, which revealed the intercalative binding to ctDNA and tRNA and static binding upon complex formation with BSA. Molecular insights into the binding affinity of the characterized complexes were provided through conducting molecular docking analysis. Moreover, the cytotoxic activity (in vitro) of the compounds was screened against human cancerous cell lines and a non-cancerous lung fibroblast (WI38) one using cis-platin as a reference drug. The IC50 and selective index (SI) values indicated the higher cytotoxic activity of all the metal complexes compared to their parent ligand. Among all the compounds, the complex C2 showed the highest activity. These results confirmed the improvement of the anticancer activity of the ligand by incorporating the metal ions. In addition, flow cytometry results showed that complexes C1 and C2 induced cell cycle arrest at S and G1/S, respectively.
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Affiliation(s)
- Shadia A Elsayed
- Chemistry Department, Faculty of Science, Damietta University New Damietta 34517 Egypt
| | - Islam M Elnabky
- Chemistry Department, Faculty of Science, Damietta University New Damietta 34517 Egypt
| | - Mohamed M Aboelnga
- Chemistry Department, Faculty of Science, Damietta University New Damietta 34517 Egypt
| | - Ahmed M El-Hendawy
- Chemistry Department, Faculty of Science, Damietta University New Damietta 34517 Egypt
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2
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Morozova EP, Smoliarova TE, Lukyanenko KA, Kirillova MA, Volochaev MN, Kichkailo AS, Ranjan R, Kratasyuk VA. Metal-enhanced bioluminescence by detergent stabilized Ag and Au nanoparticles. Talanta 2023; 254:124157. [PMID: 36470014 DOI: 10.1016/j.talanta.2022.124157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 11/25/2022] [Accepted: 11/28/2022] [Indexed: 12/04/2022]
Abstract
The assessment of microbial contamination is an important aspect of ensuring human food safety. One of the modern methods for the evaluation of microbial contamination is the estimation of the amount of ATP using firefly luciferase. In this case, the choice of an effective composition of the extraction buffer is crucial. In this study, we examined the influence of silver and gold nanoparticles on the firefly bioluminescent system during the ATP extraction process. It was found that gold nanoparticles stabilized with benzalkonium chloride and Triton X-100 enhanced bioluminescent system signal intensity due to metal-enhanced bioluminescence. Moreover, silver and gold nanoparticles could be used as extracting agents. So, using gold nanoparticles stabilized with BAC and Triton X-100 as ATP extraction agents with further detection by a bioluminescent system makes it possible to develop an ATP biosensor with higher sensitivity.
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Affiliation(s)
- Elizaveta P Morozova
- Siberian Federal University, Krasnoyarsk 660041, Russia; Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia; Krasnoyarsk State Medical University, Krasnoyarsk, 660022, Russia
| | | | - Kirill A Lukyanenko
- Siberian Federal University, Krasnoyarsk 660041, Russia; Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia; Krasnoyarsk State Medical University, Krasnoyarsk, 660022, Russia
| | | | | | - Anna S Kichkailo
- Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia; Krasnoyarsk State Medical University, Krasnoyarsk, 660022, Russia
| | - Rajeev Ranjan
- Siberian Federal University, Krasnoyarsk 660041, Russia
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3
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Farajzadeh-Dehkordi N, Zahraei Z, Farhadian S, Gholamian-Dehkordi N. The interactions between Reactive Black 5 and human serum albumin: combined spectroscopic and molecular dynamics simulation approaches. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:70114-70124. [PMID: 35583763 DOI: 10.1007/s11356-022-20736-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 05/05/2022] [Indexed: 06/15/2023]
Abstract
Azo dyes are made in significant amounts annually and released into the environment after being employed in the industry. There are some reports about the toxic effects of these dyes on several organisms. Thus, the textile dye Reactive Black 5 (RB5) has been examined for its cytotoxic effects on the human serum albumin (HSA) structure. Molecular interaction between RB5 and HSA indicated the combination of docking methods, molecular dynamic simulation, and multi-spectroscopic approaches. HSA's intrinsic fluorescence was well quenched with enhancing RB5 level, confirming complex formation. Molecular dynamics (MD) simulation was done to study the cytotoxic effects of RB5 and HSA conformation. Molecular modeling revealed that the RB5-HSA complex was stabilized by hydrogen bonds and van der Waals interactions. The results of molecular docking revealed that the binding energy of RB5 to HSA was - 27.94 kJ/mol. The change in secondary structure causes the annihilation of hydrogen bonding networks and the reduction of biological activity. This research can indicate a suitable molecular modeling interaction of RB5 and HAS and broaden our knowledge for azo dye toxicity under natural conditions.
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Affiliation(s)
- Nazanin Farajzadeh-Dehkordi
- Department of Cell and Molecular Biology, Faculty of Chemistry, University of Kashan, Kashan, 8731751167, Iran
| | - Zohreh Zahraei
- Department of Cell and Molecular Biology, Faculty of Chemistry, University of Kashan, Kashan, 8731751167, Iran.
| | - Sadegh Farhadian
- Department of Biology, Faculty of Science, Shahrekord University, P. O. Box 115, Shahrekord, Iran
- Member of Chahar Mahal & Bakhtiari Science and Technology Park, SaNa Zist Pardaz Co, Shahrekord, Iran
| | - Neda Gholamian-Dehkordi
- Department of Molecular Medicine, School of Advanced Technologies, Shahrekord University of Medical Sciences, Shahrekord, Iran
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4
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Golian KP, Akari AS, Hodgson GK, Impellizzeri S. Fluorescence activation, patterning and enhancement with photogenerated radicals, a prefluorescent probe and silver nanostructures. RSC Adv 2021. [DOI: 10.1039/d0ra09565f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
We designed a switchable fluorophore activated by UVA light and a radical initiator, for optical lithography with concomitant metal-enhanced fluorescence by silver nanoparticles.
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Affiliation(s)
- Karol P. Golian
- Laboratory for Nanomaterials and Molecular Plasmonics
- Department of Chemistry and Biology
- Ryerson University
- Toronto
- Canada
| | - Aviya S. Akari
- Laboratory for Nanomaterials and Molecular Plasmonics
- Department of Chemistry and Biology
- Ryerson University
- Toronto
- Canada
| | - Gregory K. Hodgson
- Laboratory for Nanomaterials and Molecular Plasmonics
- Department of Chemistry and Biology
- Ryerson University
- Toronto
- Canada
| | - Stefania Impellizzeri
- Laboratory for Nanomaterials and Molecular Plasmonics
- Department of Chemistry and Biology
- Ryerson University
- Toronto
- Canada
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5
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Dinel M, Tartaggia S, Wallace GQ, Boudreau D, Masson J, Polo F. The Fundamentals of Real‐Time Surface Plasmon Resonance/Electrogenerated Chemiluminescence. Angew Chem Int Ed Engl 2019; 58:18202-18206. [DOI: 10.1002/anie.201909806] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/30/2019] [Indexed: 12/26/2022]
Affiliation(s)
- Marie‐Pier Dinel
- Department of ChemistryUniversité de Montréal C.P. 6128 Succ. Centre-Ville Montreal Qc H3C 3J7 Canada
| | - Stefano Tartaggia
- Farmacologia Sperimentale e ClinicaIRCCS Centro di Riferimento Oncologico Via Franco Gallini 2 33081 Aviano Italy
| | - Gregory Q. Wallace
- Department of ChemistryUniversité de Montréal C.P. 6128 Succ. Centre-Ville Montreal Qc H3C 3J7 Canada
| | - Denis Boudreau
- Department of Chemistry and Centre for Optics, Photonics and Lasers (COPL)Université Laval 1045, av. de la Médecine Québec Qc G1V 0A6 Canada
| | - Jean‐Francois Masson
- Department of ChemistryUniversité de Montréal C.P. 6128 Succ. Centre-Ville Montreal Qc H3C 3J7 Canada
| | - Federico Polo
- Department of Molecular Sciences and NanosystemsCa' Foscari University of Venice Via Torino 155B 30172 Venezia Italy
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6
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Dinel M, Tartaggia S, Wallace GQ, Boudreau D, Masson J, Polo F. The Fundamentals of Real‐Time Surface Plasmon Resonance/Electrogenerated Chemiluminescence. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909806] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Marie‐Pier Dinel
- Department of ChemistryUniversité de Montréal C.P. 6128 Succ. Centre-Ville Montreal Qc H3C 3J7 Canada
| | - Stefano Tartaggia
- Farmacologia Sperimentale e ClinicaIRCCS Centro di Riferimento Oncologico Via Franco Gallini 2 33081 Aviano Italy
| | - Gregory Q. Wallace
- Department of ChemistryUniversité de Montréal C.P. 6128 Succ. Centre-Ville Montreal Qc H3C 3J7 Canada
| | - Denis Boudreau
- Department of Chemistry and Centre for Optics, Photonics and Lasers (COPL)Université Laval 1045, av. de la Médecine Québec Qc G1V 0A6 Canada
| | - Jean‐Francois Masson
- Department of ChemistryUniversité de Montréal C.P. 6128 Succ. Centre-Ville Montreal Qc H3C 3J7 Canada
| | - Federico Polo
- Department of Molecular Sciences and NanosystemsCa' Foscari University of Venice Via Torino 155B 30172 Venezia Italy
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7
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Mikhailov OV, Mikhailova EO. Elemental Silver Nanoparticles: Biosynthesis and Bio Applications. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E3177. [PMID: 31569794 PMCID: PMC6803994 DOI: 10.3390/ma12193177] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 09/19/2019] [Accepted: 09/24/2019] [Indexed: 02/08/2023]
Abstract
The data on the specifics of synthesis of elemental silver nanoparticles (Ag-NP) having various geometric shapes (pseudo spherical, prismatic, cubic, trigonal-pyramidal, etc.), obtained by using various biological methods, and their use in biology and medicine have been systematized and generalized. The review covers mainly publications published in the current 21st century. Bibliography: 262 references.
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Affiliation(s)
- Oleg V Mikhailov
- Analytical Chemistry, Certification and Quality Management, Kazan National Research Technological University, K. Marx Street 68, 420015 Kazan, Russia.
| | - Ekaterina O Mikhailova
- Analytical Chemistry, Certification and Quality Management, Kazan National Research Technological University, K. Marx Street 68, 420015 Kazan, Russia.
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8
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Chen IH, Chen YF, Liou JH, Lai JT, Hsu CC, Wang NY, Jan JS. Green synthesis of gold nanoparticle/gelatin/protein nanogels with enhanced bioluminescence/biofluorescence. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 105:110101. [PMID: 31546461 DOI: 10.1016/j.msec.2019.110101] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 07/24/2019] [Accepted: 08/19/2019] [Indexed: 12/15/2022]
Abstract
Here we report the green synthesis of gelatin/protein hybrid nanogels containing gold nanoparticles (AuNPs) that collectively exhibit metal-enhanced luminescence/fluorescence (MEL/MEF). The gelatin/protein nanogels, prepared by genipin cross-linking of preformed gelatin/protein polyion complexes (PICs), exhibited sizes ranging between 50 and 200 nm, depending on the weight ratio of gelatin and protein. These nanogels serve as reducing and stabilizing agents for the AuNPs, allowing for nucleation in a gel network that exhibits colloidal stability and MEL/MEF. AuNP/gelatin/HRP and AuNP/gelatin/LTF nanogels presented an ~11-fold enhancement of bioluminescence in an HRP-luminol system and a ~50-fold fluorescence enhancement when compared to free LTF in cell uptake experiments. These hybrid nanogels show promise for optically enhanced diagnosis and other therapeutic applications.
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Affiliation(s)
- I-Hsiu Chen
- Department of Chemical Engineering, National Cheng Kung University, No 1, University Rd., Tainan 70101, Taiwan
| | - Yu-Fon Chen
- Department of Chemical Engineering, National Cheng Kung University, No 1, University Rd., Tainan 70101, Taiwan
| | - Jhih-Han Liou
- Department of Chemical Engineering, National Cheng Kung University, No 1, University Rd., Tainan 70101, Taiwan
| | - Jinn-Tsyy Lai
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu 30052, Taiwan
| | - Chia-Chen Hsu
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu 30052, Taiwan
| | - Nai-Yi Wang
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu 30052, Taiwan
| | - Jeng-Shiung Jan
- Department of Chemical Engineering, National Cheng Kung University, No 1, University Rd., Tainan 70101, Taiwan; Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan 70101, Taiwan.
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9
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Zong C, Zhang D, Jiang F, Yang H, Liu S, Li P. Metal-enhanced chemiluminescence detection of C-reaction protein based on silver nanoparticle hybrid probes. Talanta 2019; 199:164-169. [DOI: 10.1016/j.talanta.2019.02.060] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 01/11/2019] [Accepted: 02/15/2019] [Indexed: 10/27/2022]
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10
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Mikhailov OV. Progress in the synthesis of Ag nanoparticles having manifold geometric forms. REV INORG CHEM 2018. [DOI: 10.1515/revic-2017-0016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe data on the specific synthesis of elemental silver nanoparticles having the forms of various geometric bodies (pseudo spherical, prismatic, cubic, trigonal-pyramidal, etc.), obtained by various chemical, physicochemical, and biological methods, have been systematized and generalized. This review covers mainly publications published in the current 21st century.
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Affiliation(s)
- Oleg V. Mikhailov
- Kazan National Research Technological University, K. Marx Street 68, 420015 Kazan, Russia
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11
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Guidelli EJ, Ramos AP, Baffa O. Unconventional Increase in Non-Radiative Transitions in Plasmon-Enhanced Luminescence: A Distance-Dependent Coupling. Sci Rep 2016; 6:36691. [PMID: 27848977 PMCID: PMC5111102 DOI: 10.1038/srep36691] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 10/10/2016] [Indexed: 11/08/2022] Open
Abstract
We used Optically Stimulated Luminescence (OSL) from X-ray-irradiated sodium chloride nanocrystals to investigate how silver nanoparticle (AgNP) films enhanced luminescence. We controlled the emitter-AgNP distance and used the OSL intensity and decay times to explore the plasmonic interactions underlying the enhanced luminescence. Both intensity and decay times depended on the emitter-AgNP distance, which suggested that a mechanism involving energy transfer from the localized surface plasmons (LSPs) to the trapped electrons took place through a distance-dependent coupling. Compared to other plasmon-enhanced mechanisms, the energy transfer observed here occurred in the opposite bias: LSP relaxation stimulated electron transfer from non-optically active traps to optically active traps, which culminated in enhanced emission. Therefore, a different mechanism of plasmonic coupling converted optically unreachable electrons into useful luminescence information.
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Affiliation(s)
- Eder José Guidelli
- Departamento de Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brasil
| | - Ana Paula Ramos
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brasil
| | - Oswaldo Baffa
- Departamento de Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brasil
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12
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Chemiluminescence reactions enhanced by silver nanoparticles and silver alloy nanoparticles: Applications in analytical chemistry. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.05.018] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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13
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Mohammed M, Syed MF, Aslan K. Microwave-accelerated bioassay technique for rapid and quantitative detection of biological and environmental samples. Biosens Bioelectron 2016; 75:420-6. [PMID: 26356762 DOI: 10.1016/j.bios.2015.08.061] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 08/18/2015] [Accepted: 08/28/2015] [Indexed: 01/14/2023]
Abstract
Quantitative detection of molecules of interest from biological and environmental samples in a rapid manner, particularly with a relevant concentration range, is imperative to the timely assessment of human diseases and environmental issues. In this work, we employed the microwave-accelerated bioassay (MAB) technique, which is based on the combined use of circular bioassay platforms and microwave heating, for rapid and quantitative detection of Glial Fibrillary Acidic Protein (GFAP) and Shiga like toxin (STX 1). The proof-of-principle use of the MAB technique with the circular bioassay platforms for the rapid detection of GFAP in buffer based on colorimetric and fluorescence readouts was demonstrated with a 900W kitchen microwave. We also employed the MAB technique with a new microwave system (called the iCrystal system) for the detection of GFAP from mice with brain injuries and STX 1 from a city water stream. Control bioassays included the commercially available gold standard bioassay kits run at room temperature. Our results show that the lower limit of detection (LLOD) of the colorimetric and fluorescence based bioassays for GFAP was decreased by ~1000 times using the MAB technique and our circular bioassay platforms as compared to the commercially available bioassay kits. The overall bioassay time for GFAP and STX 1 was reduced from 4h using commercially available bioassay kits to 10min using the MAB technique.
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Affiliation(s)
- Muzaffer Mohammed
- Morgan State University, Department of Chemistry, 1700 East Cold Spring Lane, Baltimore, MD 21251, United States
| | - Maleeha F Syed
- Morgan State University, Department of Chemistry, 1700 East Cold Spring Lane, Baltimore, MD 21251, United States
| | - Kadir Aslan
- Morgan State University, Department of Chemistry, 1700 East Cold Spring Lane, Baltimore, MD 21251, United States.
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14
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Enhancement of the Chemiluminescence Response of Enzymatic Reactions by Plasmonic Surfaces for Biosensing Applications. NANO BIOMEDICINE AND ENGINEERING 2015. [PMID: 26582101 DOI: 10.5101/nbe.v7i3.p92-101.] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We report the enhancement of chemiluminescence response of horseradish peroxidase (HRP) in bioassays by plasmonic surfaces, which are comprised of (i) silver island films (SIFs) and (ii) metal thin films (silver, gold, copper, and nickel, 1 nm thick) deposited onto glass slides. A model bioassay, based on the interactions of avidin-modified HRP with a monolayer of biotinylated poly(ethylene-glycol)-amine, was employed to evaluate the ability of plasmonic surfaces to enhance chemiluminescence response of HRP. Chemiluminescence response of HRP in model bioassays were increased up to ~3.7-fold as compared to the control samples (i.e. glass slides without plasmonic nanoparticles), where the largest enhancement of the chemiluminescence response was observed on SIFs with high loading. These findings allowed us to demonstrate the use of SIFs (high loading) for the detection of a biologically relevant target protein (glial fibrillary acidic protein or GFAP), where the chemiluminescence response of the standard bioassay for GFAP was enhanced up to ~50% as compared to bioassay on glass slides.
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15
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Du J, Jin J, Liu Y, Li J, Tokatlian T, Lu Z, Segura T, Yuan XB, Yang X, Lu Y. Gold-nanocrystal-enhanced bioluminescent nanocapsules. ACS NANO 2014; 8:9964-9969. [PMID: 25243486 DOI: 10.1021/nn504371h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Metal-enhanced bioluminescence presents a great opportunity to achieve ultrasensitive analysis and imaging with low bioluminescent background and enhanced luminescence. We hereby report metal-enhanced bioluminescence based on bioluminescent protein nanocapsules conjugated with gold nanocrystals. Such gold-nanocapsule complexes exhibit near 10-fold enhancement in bioluminescent intensity and are effectively delivered into the cells with outstanding stability. This work offers a class of bioluminescent nanoparticles for imaging and other applications.
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Affiliation(s)
- Juanjuan Du
- Department of Chemical and Biomolecular Engineering, University of California at Los Angeles , Los Angeles, California 90095, United States
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16
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Qi Y, Li B, Xiu F. Effect of aggregated silver nanoparticles on luminol chemiluminescence system and its analytical application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 128:76-81. [PMID: 24662755 DOI: 10.1016/j.saa.2014.02.139] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Revised: 02/15/2014] [Accepted: 02/21/2014] [Indexed: 06/03/2023]
Abstract
We found that after silver nanoparticles (AgNPs) aggregated, its catalytic activity on luminol CL reaction obviously changed, and the change characteristic was closely related to the sizes of AgNPs. UV-visible spectra, X-ray photoelectron spectra, zeta potential and transmission electron microscopy studies were carried out to investigate the CL effect mechanism. The different CL responses of aggregated AgNPs with different size were suggested to be due to the two effects of quantum size and electron density in nanoparticle's conduction bands, and which one played a major role. The poisonous organic contaminants such as anilines, could induce the aggregation of AgNPs, were observed to affect effectively the luminol-H2O2-7 nm and 15 nm AgNPs CL systems and were detectable by use of a flow injection method with the enhanced or inhibited CL detection.
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Affiliation(s)
- Yingying Qi
- Department of Environment and Equipment Engineering, Fujian University of Technology, Fuzhou 350108, PR China; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, PR China
| | - Baoxin Li
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, PR China.
| | - Furong Xiu
- Department of Environment and Equipment Engineering, Fujian University of Technology, Fuzhou 350108, PR China
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17
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Becker F, Krix D, Hagemann U, Nienhaus H. Internal detection of surface plasmon coupled chemiluminescence during chlorination of potassium thin films. J Chem Phys 2013; 138:034710. [DOI: 10.1063/1.4776156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Rezaei B, Ensafi AA, Zarei L. Fast and sensitive chemiluminescence assay of aminophylline in human serum using luminol-diperiodatoargentate(III) system catalyzed by coated iron nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 90:223-229. [PMID: 22343083 DOI: 10.1016/j.saa.2012.01.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Revised: 01/02/2012] [Accepted: 01/18/2012] [Indexed: 05/31/2023]
Abstract
The CL intensity of luminol-diperiodatoargentate(III) (DPA) system is strongly enhanced by addition of iron nanoparticles (FeNPs) covered with C12E4. On injection of aminophylline into luminol-DPA-FeNPs system, the CL intensity is significantly increased. On this basis, a sensitive CL assay was developed for determination of AmP in human serum. FeNPs could catalyze the oxidation rate of luminol in the present of oxygen. Also, the CL intensity of luminol-DPA-FeNPs system is significantly increased in the presence of aminophylline (AmP). Based on this ruling, a sensitive CL assay was developed for determination of AmP in human serum. The influences of analytical variables on the CL signal were studied and optimized. Under the optimum conditions in the present of FeNPs, the CL intensity is linearly increased with AmP concentration in the range of 1.0×10(-8)-2.0×10(-6) mol L(-1). The detection limit was 9.8×10(-9) mol L(-1) AmP and the relative standard deviation for ten parallel measurements of 8.0×10(-7)mol L(-1) AmP was also 4.8%. The proposed system was successfully applied to determine AmP in human serum samples.
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Affiliation(s)
- B Rezaei
- Department of Chemistry, Isfahan University of Technology, Isfahan, Islamic Republic of Iran.
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19
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Duer R, Lund R, Tanaka R, Christensen DA, Herron JN. In-Plane Parallel Scanning: A Microarray Technology for Point-of-Care Testing. Anal Chem 2010; 82:8856-65. [DOI: 10.1021/ac101571b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Reuven Duer
- PLC Diagnostics, Inc., 192 Odebolt Drive, Thousand Oaks, California 91360, United States, Departments of Bioengineering and Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Russell Lund
- PLC Diagnostics, Inc., 192 Odebolt Drive, Thousand Oaks, California 91360, United States, Departments of Bioengineering and Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Richard Tanaka
- PLC Diagnostics, Inc., 192 Odebolt Drive, Thousand Oaks, California 91360, United States, Departments of Bioengineering and Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Douglas A. Christensen
- PLC Diagnostics, Inc., 192 Odebolt Drive, Thousand Oaks, California 91360, United States, Departments of Bioengineering and Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - James N. Herron
- PLC Diagnostics, Inc., 192 Odebolt Drive, Thousand Oaks, California 91360, United States, Departments of Bioengineering and Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
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20
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Li N, Gu J, Cui H. Luminol chemiluminescence induced by silver nanoparticles in the presence of nucleophiles and Cu2+. J Photochem Photobiol A Chem 2010. [DOI: 10.1016/j.jphotochem.2010.08.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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21
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Zhang Y, Geddes CD. Metal-enhanced fluorescence from thermally stable rhodium nanodeposits. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm01806f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Aslan K, Geddes CD. Metal-enhanced chemiluminescence: advanced chemiluminescence concepts for the 21st century. Chem Soc Rev 2009; 38:2556-64. [PMID: 19690736 PMCID: PMC2744048 DOI: 10.1039/b807498b] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chemiluminescent-based detection is entrenched throughout the biosciences today, such as in blotting, analyte and protein quantification and detection. While the biological applications of chemiluminescence are forever growing, the underlying principles of using a probe, an oxidizer and a catalyst (biological, organic or inorganic) have remained mostly unchanged for decades. Subsequently, chemiluminescence-based detection is fundamentally limited by the classical photochemical properties of reaction yield, quantum yield, etc. However, over the last 5 years, a new technology has emerged which looks set to fundamentally change the way we both think about and use chemiluminescence today. Metal surface plasmons can amplify chemiluminescence signatures, while low-power microwaves can complete reactions within seconds. In addition, thin metal films can convert spatially isotopic chemiluminescence into directional emission. In this forward looking tutorial review, we survey what could well be the next-generation chemiluminescent-based technologies.
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Affiliation(s)
- Kadir Aslan
- The Institute of Fluorescence, University of Maryland Biotechnology Institute, 701 East Pratt Street, Baltimore, MD, USA, 21202
| | - Chris D. Geddes
- The Institute of Fluorescence, University of Maryland Biotechnology Institute, 701 East Pratt Street, Baltimore, MD, USA, 21202
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23
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Aslan K, Previte MJ, Zhang Y, Geddes CD. Metal-Enhanced Fluorescence from Nanoparticulate Zinc Films. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2008; 112:18368-18375. [PMID: 19946356 PMCID: PMC2676115 DOI: 10.1021/jp806790u] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
A detailed study of metal-enhanced fluorescence (MEF) from fluorophores in the blue-to- red spectral region placed in close proximity to thermally evaporated zinc nanostructured films is reported. The zinc nanostructured films were deposited onto glass microscope slides as individual particles and were 1-10 nm in height and 20-100 nm in width, as characterized by Atomic Force Microscopy. The surface plasmon resonance peak of the zinc nanostructured films was approximately 400 nm. Finite-difference time-domain calculations for single and multiple nanostructures organized in a staggered fashion on a solid support predict, as expected, that the electric fields are concentrated both around and between the nanostructures. Additionally, Mie scattering calculations show that the absorption and scattering components of the extinction spectrum are dominant in the UV and visible spectral ranges, respectively. Enhanced fluorescence emission accompanied by no significant changes in excited state lifetimes of fluorophores with emission wavelengths in the visible blue-to-red spectral range near-to zinc nanostructured films were observed, implying that MEF from zinc nanostructured films is mostly due to an electric field enhancement effect.
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24
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Aslan K, Geddes CD. New tools for rapid clinical and bioagent diagnostics: microwaves and plasmonic nanostructures. Analyst 2008; 133:1469-80. [PMID: 18936822 DOI: 10.1039/b808292h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this timely review, we summarize recent work on ultra-fast and sensitive bioassays based on microwave heating, and provide our current interpretation of the role of the combined use of microwave energy and plasmonic nanostructures for applications in rapid clinical and bioagent diagnostics. The incorporation of microwave heating into plasmonic nanostructure-based bioassays brings new advancements to diagnostic tests. A temperature gradient, created by the selective heating of water in the presence of plasmonic nanostructures, results in an increased mass transfer of target biomolecules towards the biorecognition partners placed on the plasmonic nanostructures, enabling diagnostic tests to be completed in less than a minute, and in some cases only a few seconds, by further microwave heating. The diagnostic tests can also be run in complex biological samples, such as human serum and whole blood.
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Affiliation(s)
- Kadir Aslan
- Institute of Fluorescence, Laboratory for Advanced Medical Plasmonics, Medical Biotechnology Center, University of Maryland Biotechnology Institute, Baltimore, MD 21201, USA
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25
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Lowry M, Fakayode SO, Geng ML, Baker GA, Wang L, McCarroll ME, Patonay G, Warner IM. Molecular Fluorescence, Phosphorescence, and Chemiluminescence Spectrometry. Anal Chem 2008; 80:4551-74. [DOI: 10.1021/ac800749v] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Mark Lowry
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale,
| | - Sayo O. Fakayode
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale,
| | - Maxwell L. Geng
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale,
| | - Gary A. Baker
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale,
| | - Lin Wang
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale,
| | - Matthew E. McCarroll
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale,
| | - Gabor Patonay
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale,
| | - Isiah M. Warner
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale,
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26
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Aslan K, Malyn SN, Geddes CD. Multicolor microwave-triggered metal-enhanced chemiluminescence. J Am Chem Soc 2007; 128:13372-3. [PMID: 17031946 DOI: 10.1021/ja065571r] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We describe a novel platform technology for both significantly enhancing and obtaining chemiluminescence signatures "on-demand", subsequently named Microwave-Triggered Metal-Enhanced Chemiluminescence. By combining the use of silver nanoparticles to plasmon enhance chemiluminescence with the use of low power microwaves to localize heating around the nanostructures, we can both optically amplify and trigger chemiluminescence reactions. This approach is a significant advantage over traditional chemiluminescence techniques and methodologies, such as those used for Western Blots, which typically require long periods of time to collect chemiluminescence and offer few possibilities of optically amplifying the signatures.
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Affiliation(s)
- Kadir Aslan
- Institute of Fluorescence, Laboratory for Advanced Medical Plasmonics, Medical Biotechnology Center, University of Maryland Biotechnology Institute, 725 West Lombard Street, Baltimore, MD 21021, USA
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27
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Previte MJR, Geddes CD. Microwave-Triggered Chemiluminescence with Planar Geometrical Aluminum Substrates: Theory, Simulation and Experiment. J Fluoresc 2007; 17:279-87. [PMID: 17404821 DOI: 10.1007/s10895-007-0170-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2006] [Accepted: 02/06/2007] [Indexed: 11/30/2022]
Abstract
Previously we combined common practices in protein detection with chemiluminescence, microwave technology, and metal-enhanced chemiluminescence to demonstrate that we can use low power microwaves to substantially increase enzymatic chemiluminescent reaction rates on particulate silvered substrates. We now describe the applicability of continuous aluminum metal substrates to potentially further enhance or "trigger" enzymatic chemiluminescence reactions. Furthermore, our results suggest that the extent of chemiluminescence enhancement for surface and solution based enzyme reactions critically depends on the surface geometry of the aluminum film. In addition, we also use FDTD simulations to model the interactions of the incident microwave radiation with the aluminum geometries used. We demonstrate that the extent of microwave field enhancement for solution and surface based chemiluminescent reactions can be ascribed to "lightning rod" effects that give rise to different electric field distributions for microwaves incident on planar aluminum geometries. With these results, we believe that we can spatially and temporally control the extent of triggered chemiluminescence with low power microwave (Mw) pulses and maximize localized microwave triggered metal-enhanced chemiluminescence (MT-MEC) with optimized planar aluminum geometries. Thus we can potentially further improve the sensitivity of immunoassays with significantly enhanced signal-to-noise ratios.
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Affiliation(s)
- Michael J R Previte
- Institute of Fluorescence, Laboratory for Advanced Fluorescence Spectroscopy & Laboratory for Advanced Medical Plasmonics, Medical Biotechnology Center, University of Maryland Biotechnology Institute, 725 West Lombard St., Baltimore, MD 21201, USA
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28
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Previte MJR, Aslan K, Malyn SN, Geddes CD. Microwave triggered metal enhanced chemiluminescence: Quantitative protein determination. Anal Chem 2007; 78:8020-7. [PMID: 17134135 DOI: 10.1021/ac061161+] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a new technology that offers a faster alternative to the chemiluminescence-based detection that is used in protein assay platforms today. By combining the use of silver nanostructures with chemiluminescent species, a technique that our laboratories have recently shown can enhance the system photon flux over 50-fold, with the use of low-power microwave heating to additionally accelerate, in essence "trigger", chemiluminescence-based reactions, then both ultrafast and ultrabright chemiluminescence assays can be realized. In addition, the preferential heating of the nanostructures by microwaves affords for microwave triggered metal enhanced chemiluminescence (MT-MEC) to be localized in proximity to the silvered surfaces, alleviating unwanted emission from the distal solution. To demonstrate MT-MEC, we have constructed a model assay sensing platform on both silvered and glass surfaces, where comparison with the identical glass substrate-based assay serves to confirm the significant benefits of using silver nanostructures for metal-enhanced chemiluminescence. Our new model assay technology can detect femtomoles of biotinylated BSA in less than 2 min and can indeed be modified to both detect and quantify a great many other biomolecules as well. As compared to traditional western blot approaches, MT-MEC offers protein quantification, high-sensitivity detection combined with ultrafast assay times, i.e., <2 min.
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Affiliation(s)
- Michael J R Previte
- Institute of Fluorescence, Laboratory for Advanced Medical Plasmonics, Medical Biotechnology Center, University of Maryland Biotechnology Institute, 725 West Lombard Street, Baltimore, MD 21201, USA
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29
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Chowdhury MH, Malyn SN, Aslan K, Lakowicz JR, Geddes CD. First Observation of Surface Plasmon-Coupled Chemiluminescence (SPCC). Chem Phys Lett 2007; 435:114-118. [PMID: 18268785 DOI: 10.1016/j.cplett.2006.12.063] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In this letter, we report the first observation of surface plasmon-coupled chemiluminescence (SPCC), where the luminescence from chemically induced electronic excited states couples to surface plasmons in a thin continuous silver film. The SPCC is highly directional and predominantly p-polarized, strongly suggesting that the emission is from surface plasmons instead of the luminophores directly themselves. This indicates that surface plasmons can be directly excited from chemically induced excited states. With a wealth of assays that employ chemiluminescence based detection currently in use, then our findings suggest new chemiluminescence sensing strategies based on localized, directional and polarized chemiluminescence detection.
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Affiliation(s)
- Mustafa H Chowdhury
- Center for Fluorescence Spectroscopy, Medical Biotechnology Center, University of Maryland School of Medicine, 725 West Lombard St, Baltimore, MD, 21201
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30
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Chowdhury MH, Malyn SN, Aslan K, Lakowicz JR, Geddes CD. Multicolor directional surface plasmon-coupled chemiluminescence. J Phys Chem B 2007; 110:22644-51. [PMID: 17092012 PMCID: PMC2737402 DOI: 10.1021/jp064609j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In reports over the past several years, we have demonstrated the efficient collection of optically excited fluorophore emission by its coupling to surface plasmons on thin metallic films, where the coupled luminescence was highly directional and polarized. This phenomenon is referred to as surface plasmon-coupled emission (SPCE). In this current study, we have extended this technique to include chemiluminescing species and subsequentially now report the observation of surface plasmon-coupled chemiluminescence (SPCC), where the luminescence from chemically induced electronic excited states couples to surface plasmons in thin continuous metal films. The SPCC is highly directional and predominantly p-polarized, strongly suggesting that the emission is from surface plasmons instead of the luminophores themselves. This indicates that surface plasmons can be directly excited from chemically induced electronic excited states and excludes the possibility that the plasmons are created by incident excitation light. This phenomenon has been observed for a variety of chemiluminescent species in the visible spectrum, ranging from blue to red, and also on a variety of metals, namely, aluminum, silver, and gold. Our findings suggest new chemiluminescence sensing strategies on the basis of localized, directional, and polarized chemiluminescence detection, especially given the wealth of assays that currently employ chemiluminescence-based detection.
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Affiliation(s)
| | | | | | | | - Chris D. Geddes
- Author to whom correspondence should be addressed. Fax: (410) 706–4600.
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31
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Previte MJR, Aslan K, Malyn S, Geddes CD. Microwave-Triggered Metal-Enhanced Chemiluminescence (MT-MEC): Application to Ultra-fast and Ultra-sensitive Clinical Assays. J Fluoresc 2006; 16:641-7. [PMID: 16952011 DOI: 10.1007/s10895-006-0121-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2006] [Accepted: 08/03/2006] [Indexed: 10/24/2022]
Abstract
In this rapid communication we describe a new approach to protein detection with chemiluminescence. By combining common practices in protein detection with chemiluminescence, microwave technology, and metal-enhanced chemiluminescence, we show that we can use low power microwaves to substantially increase enzymatic chemiluminescent reaction rates on metal substrates. As a result, we have found that we can in essence trigger chemiluminescence with low power microwave (Mw) pulses and ultimately, perform on-demand protein detection assays. Using microwave triggered metal-enhanced chemiluminescence (MT-MEC), we not only improve the sensitivity of immunoassays with enhanced signal-to-noise ratios, but we also show that we can accurately quantify protein concentrations by integrating the photon flux for discrete time intervals.
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Affiliation(s)
- Michael J R Previte
- Laboratory for Advanced Medical Plasmonics, Medical Biotechnology Center, Institute of Fluorescence, University of Maryland Biotechnology Institute, 725 West Lombard St., Baltimore, MD 21201, USA
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