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Dzyhovskyi V, Romani A, Pula W, Bondi A, Ferrara F, Melloni E, Gonelli A, Pozza E, Voltan R, Sguizzato M, Secchiero P, Esposito E. Characterization Methods for Nanoparticle-Skin Interactions: An Overview. Life (Basel) 2024; 14:599. [PMID: 38792620 PMCID: PMC11122446 DOI: 10.3390/life14050599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 05/02/2024] [Accepted: 05/04/2024] [Indexed: 05/26/2024] Open
Abstract
Research progresses have led to the development of different kinds of nanoplatforms to deliver drugs through different biological membranes. Particularly, nanocarriers represent a precious means to treat skin pathologies, due to their capability to solubilize lipophilic and hydrophilic drugs, to control their release, and to promote their permeation through the stratum corneum barrier. A crucial point in the development of nano-delivery systems relies on their characterization, as well as in the assessment of their interaction with tissues, in order to predict their fate under in vivo administration. The size of nanoparticles, their shape, and the type of matrix can influence their biodistribution inside the skin strata and their cellular uptake. In this respect, an overview of some characterization methods employed to investigate nanoparticles intended for topical administration is presented here, namely dynamic light scattering, zeta potential, scanning and transmission electron microscopy, X-ray diffraction, atomic force microscopy, Fourier transform infrared and Raman spectroscopy. In addition, the main fluorescence methods employed to detect the in vitro nanoparticles interaction with skin cell lines, such as fluorescence-activated cell sorting or confocal imaging, are described, considering different examples of applications. Finally, recent studies on the techniques employed to determine the nanoparticle presence in the skin by ex vivo and in vivo models are reported.
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Affiliation(s)
- Valentyn Dzyhovskyi
- Department of Translational Medicine, University of Ferrara, 44121 Ferrara, Italy; (V.D.); (A.R.); (E.M.); (E.P.)
| | - Arianna Romani
- Department of Translational Medicine, University of Ferrara, 44121 Ferrara, Italy; (V.D.); (A.R.); (E.M.); (E.P.)
- Laboratorio per le Tecnologie delle Terapie Avanzate (LTTA) Centre, University of Ferrara, 44121 Ferrara, Italy;
| | - Walter Pula
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, 44121 Ferrara, Italy; (W.P.); (A.B.); (F.F.); (M.S.)
| | - Agnese Bondi
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, 44121 Ferrara, Italy; (W.P.); (A.B.); (F.F.); (M.S.)
| | - Francesca Ferrara
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, 44121 Ferrara, Italy; (W.P.); (A.B.); (F.F.); (M.S.)
| | - Elisabetta Melloni
- Department of Translational Medicine, University of Ferrara, 44121 Ferrara, Italy; (V.D.); (A.R.); (E.M.); (E.P.)
- Laboratorio per le Tecnologie delle Terapie Avanzate (LTTA) Centre, University of Ferrara, 44121 Ferrara, Italy;
| | - Arianna Gonelli
- Department of Environmental and Prevention Sciences, University of Ferrara, 44121 Ferrara, Italy;
| | - Elena Pozza
- Department of Translational Medicine, University of Ferrara, 44121 Ferrara, Italy; (V.D.); (A.R.); (E.M.); (E.P.)
| | - Rebecca Voltan
- Laboratorio per le Tecnologie delle Terapie Avanzate (LTTA) Centre, University of Ferrara, 44121 Ferrara, Italy;
- Department of Environmental and Prevention Sciences, University of Ferrara, 44121 Ferrara, Italy;
| | - Maddalena Sguizzato
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, 44121 Ferrara, Italy; (W.P.); (A.B.); (F.F.); (M.S.)
| | - Paola Secchiero
- Department of Translational Medicine, University of Ferrara, 44121 Ferrara, Italy; (V.D.); (A.R.); (E.M.); (E.P.)
- Laboratorio per le Tecnologie delle Terapie Avanzate (LTTA) Centre, University of Ferrara, 44121 Ferrara, Italy;
| | - Elisabetta Esposito
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, 44121 Ferrara, Italy; (W.P.); (A.B.); (F.F.); (M.S.)
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2
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Hu H, Tian Y, Chen P, Chu W. Perspective on Tailored Nanostructure-Dominated SPP Effects for SERS. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2303001. [PMID: 38031315 DOI: 10.1002/adma.202303001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 08/14/2023] [Indexed: 12/01/2023]
Abstract
Localized surface plasmon resonance (LSPR) excited by an incident light can normally produce strong surface-enhanced Raman scattering (SERS) at the nanogaps among plasmonic nano-objects (so-called hot spots), which is extensively explored. In contrast, surface plasmon polaritons (SPPs) that can be generated by an incident beam via particular structures with a conservation of wave vectors can excite SERS effects as well. SPPs actually play an indispensable role in high-performance SERS devices but receive much less attention. In this perspective, SPPs and their couplings with LSPR for SERS excitations with differing effectiveness through particular plasmonic/dielectric structures/configurations, along with relevant fabrication approaches, are profoundly reviewed and commented on from a unique perspective from in situ to ex situ excitations of SERS enabled by spatiotemporally separated multiple processes of SPPs. Quantitative design of particular configurations/architectures enabling highly efficient and effective multiple processes of SPPs is particularly emphasized as one giant leap toward ultimate full quantitative design of intrinsically high-performance SERS chips and very critical for their batch manufacturability and applications as well. The viewpoints and prospects about innovative SERS devices based on tailored structure-dominated SPPs effects and their coupling with LSPR are presented and discussed.
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Affiliation(s)
- Haifeng Hu
- Nanofabrication Laboratory, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Yi Tian
- Nanofabrication Laboratory, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Peipei Chen
- Nanofabrication Laboratory, National Center for Nanoscience and Technology, Beijing, 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Weiguo Chu
- Nanofabrication Laboratory, National Center for Nanoscience and Technology, Beijing, 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
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3
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Hasler R, Fenoy GE, Götz A, Montes-García V, Valentini C, Qiu Z, Kleber C, Samorì P, Müllen K, Knoll W. "Clickable" graphene nanoribbons for biosensor interfaces. NANOSCALE HORIZONS 2024; 9:598-608. [PMID: 38385442 PMCID: PMC10962640 DOI: 10.1039/d3nh00590a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 02/05/2024] [Indexed: 02/23/2024]
Abstract
We report on the synthesis of "clickable" graphene nanoribbons (GNRs) and their application as a versatile interface for electrochemical biosensors. GNRs are successfully deposited on gold-coated working electrodes and serve as a platform for the covalent anchoring of a bioreceptor (i.e., a DNA aptamer), enabling selective and sensitive detection of Interleukin 6 (IL6). Moreover, when applied as the intermediate linker on reduced graphene oxide (rGO)-based field-effect transistors (FETs), the GNRs provide improved robustness compared to conventional aromatic bi-functional linker molecules. GNRs enable an orthogonal and covalent attachment of a recognition unit with a considerably higher probe density than previously established methods. Interestingly, we demonstrate that GNRs introduce photoluminescence (PL) when applied to rGO-based FETs, paving the way toward the simultaneous optical and electronic probing of the attached biointerface.
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Affiliation(s)
- Roger Hasler
- AIT Austrian Institute of Technology GmbH, 3430 Tulln, Austria
- Laboratory for Life Sciences and Technology (LiST), Faculty of Medicine and Dentistry, Danube Private University, 3500 Krems, Austria.
| | - Gonzalo E Fenoy
- AIT Austrian Institute of Technology GmbH, 3430 Tulln, Austria
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata B1904DPI, Argentina
| | - Alicia Götz
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - Verónica Montes-García
- Université de Strasbourg, CNRS, Institut de Science et d'Ingénierie Supramoléculaires, 8 allée Gaspard Monge, 67000 Strasbourg, France
| | - Cataldo Valentini
- Université de Strasbourg, CNRS, Institut de Science et d'Ingénierie Supramoléculaires, 8 allée Gaspard Monge, 67000 Strasbourg, France
- Centre for Advanced Technologies, Adam Mickiewicz University, Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
| | - Zijie Qiu
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
- School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Shenzhen (CUHK-Shenzhen), Guangdong 518172, P. R. China
| | - Christoph Kleber
- Laboratory for Life Sciences and Technology (LiST), Faculty of Medicine and Dentistry, Danube Private University, 3500 Krems, Austria.
| | - Paolo Samorì
- Université de Strasbourg, CNRS, Institut de Science et d'Ingénierie Supramoléculaires, 8 allée Gaspard Monge, 67000 Strasbourg, France
| | - Klaus Müllen
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - Wolfgang Knoll
- AIT Austrian Institute of Technology GmbH, 3430 Tulln, Austria
- Laboratory for Life Sciences and Technology (LiST), Faculty of Medicine and Dentistry, Danube Private University, 3500 Krems, Austria.
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4
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Dimitriev O, Slominskii Y, Giancaspro M, Rizzi F, Depalo N, Fanizza E, Yoshida T. Assembling Near-Infrared Dye on the Surface of Near-Infrared Silica-Coated Copper Sulphide Plasmonic Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:510. [PMID: 36770471 PMCID: PMC9919055 DOI: 10.3390/nano13030510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/23/2023] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
Functionalization of colloidal nanoparticles with organic dyes, which absorb photons in complementary spectral ranges, brings a synergistic effect for harvesting additional light energy. Here, we show functionalization of near-infrared (NIR) plasmonic nanoparticles (NPs) of bare and amino-group functionalized mesoporous silica-coated copper sulphide (Cu2-xS@MSS and Cu2-xS@MSS-NH2) with specific tricarbocyanine NIR dye possessing sulfonate end groups. The role of specific surface chemistry in dye assembling on the surface of NPs is demonstrated, depending on the organic polar liquids or water used as a dispersant solvent. It is shown that dye binding to the NP surfaces occurs with different efficiency, but mostly in the monomer form in polar organic solvents. Conversely, the aqueous medium leads to different scenarios according to the NP surface chemistry. Predominant formation of the disordered dye monomers occurs on the bare surface of mesoporous silica shell (MSS), whereas the amino-group functionalized MSS accepts dye predominantly in the form of dimers. It is found that the dye-NP interaction overcomes the dye-dye interaction, leading to disruption of dye J-aggregates in the presence of the NPs. The different organization of the dye molecules on the surface of silica-coated copper sulphide NPs provides tuning of their specific functional properties, such as hot-band absorption and photoluminescence.
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Affiliation(s)
- Oleg Dimitriev
- V. Lashkaryov Institute of Semiconductor Physics NAS of Ukraine, pr. Nauki 41, 03028 Kyiv, Ukraine
- Graduate School of Organic Materials Science, Yamagata University, Jonan 4-3-16, Yonezawa 992-8510, Japan
| | - Yuri Slominskii
- Institute of Organic Chemistry NAS of Ukraine, 5 Murmanska Str., 02660 Kyiv, Ukraine
| | - Mariangela Giancaspro
- Chemistry Department, University of Bari, via Orabona 4, 70125 Bari, Italy
- CNR-Institute for Chemical and Physical Process, SS Bari, via Orabona 4, 70125 Bari, Italy
| | - Federica Rizzi
- Chemistry Department, University of Bari, via Orabona 4, 70125 Bari, Italy
- CNR-Institute for Chemical and Physical Process, SS Bari, via Orabona 4, 70125 Bari, Italy
| | - Nicoletta Depalo
- CNR-Institute for Chemical and Physical Process, SS Bari, via Orabona 4, 70125 Bari, Italy
| | - Elisabetta Fanizza
- Chemistry Department, University of Bari, via Orabona 4, 70125 Bari, Italy
- CNR-Institute for Chemical and Physical Process, SS Bari, via Orabona 4, 70125 Bari, Italy
| | - Tsukasa Yoshida
- Graduate School of Organic Materials Science, Yamagata University, Jonan 4-3-16, Yonezawa 992-8510, Japan
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Flexible Silicon Dimer Nanocavity with Electric and Magnetic Enhancement. PHOTONICS 2022. [DOI: 10.3390/photonics9040267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
High-index dielectrics have recently been regarded as promising building blocks in nanophotonics owing to optical electric and magnetic Mie resonances. In particular, silicon is gaining great interest as the backbone of modern technology. Here, silicon dimer nanocavities with different sizes of silicon nanospheres were constructed using a probe nanomanipulation method and interacted with a few-layered R6G membrane to investigate the enhancement of electric and magnetic mode coupling. The evidence of the enhancement of fluorescence and slightly prolonged lifetime of R6G indicated the existence of nanocavities. In addition, the simulated electric and magnetic field distributions and decomposed mode of nanocavity were used to analyze the contribution of electric and magnetic modes to the R6G enhanced fluorescence. Such silicon dimer is a flexible nanocavity with electric and magnetic mode enhancement and has promising applications in sensing and all-dielectric metamaterials or nanophotonic devices.
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6
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Self-Assembly of Au–Ag Alloy Hollow Nanochains for Enhanced Plasmon-Driven Surface-Enhanced Raman Scattering. NANOMATERIALS 2022; 12:nano12081244. [PMID: 35457952 PMCID: PMC9025440 DOI: 10.3390/nano12081244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 04/01/2022] [Accepted: 04/05/2022] [Indexed: 11/17/2022]
Abstract
In this paper, Au–Ag alloy hollow nanochains (HNCs) were successfully prepared by a template-free self-assembly method achieved by partial substitution of ligands. The obtained Au–Ag alloy HNCs exhibit stronger enhancement as surface-enhanced Raman scattering (SERS) substrates than Au–Ag alloy hollow nanoparticles (HNPs) and Au nanochains substrates with an intensity ratio of about 1.3:1:1. Finite difference time domain (FDTD) simulations show that the SERS enhancement of Au–Ag alloy HNCs substrates is produced by a synergistic effect between the plasmon hybridization effect associated with the unique alloy hollow structure and the strong “hot spot” in the interstitial regions of the nanochains.
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7
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Ardini M, Bellelli A, Williams DL, Di Leandro L, Giansanti F, Cimini A, Ippoliti R, Angelucci F. Taking Advantage of the Morpheein Behavior of Peroxiredoxin in Bionanotechnology. Bioconjug Chem 2021; 32:43-62. [PMID: 33411522 PMCID: PMC8023583 DOI: 10.1021/acs.bioconjchem.0c00621] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
![]()
Morpheeins
are proteins that reversibly assemble into different
oligomers, whose architectures are governed by conformational changes
of the subunits. This property could be utilized in bionanotechnology
where the building of nanometric and new high-ordered structures is
required. By capitalizing on the adaptability of morpheeins to create
patterned structures and exploiting their inborn affinity toward inorganic
and living matter, “bottom-up” creation of nanostructures
could be achieved using a single protein building block, which may
be useful as such or as scaffolds for more complex materials. Peroxiredoxins
represent the paradigm of a morpheein that can be applied to bionanotechnology.
This review describes the structural and functional transitions that
peroxiredoxins undergo to form high-order oligomers, e.g., rings,
tubes, particles, and catenanes, and reports on the chemical and genetic
engineering approaches to employ them in the generation of responsive
nanostructures and nanodevices. The usefulness of the morpheeins’
behavior is emphasized, supporting their use in future applications.
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Affiliation(s)
- Matteo Ardini
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
| | - Andrea Bellelli
- Department of Biochemical Sciences "A. Rossi Fanelli", University of Roma "Sapienza", Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - David L Williams
- Department of Microbial Pathogens and Immunity, Rush University Medical Center, Chicago, Illinois 60612, United States
| | - Luana Di Leandro
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
| | - Francesco Giansanti
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
| | - Annamaria Cimini
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
| | - Rodolfo Ippoliti
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
| | - Francesco Angelucci
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
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Koike K, Bando K, Ando J, Yamakoshi H, Terayama N, Dodo K, Smith NI, Sodeoka M, Fujita K. Quantitative Drug Dynamics Visualized by Alkyne-Tagged Plasmonic-Enhanced Raman Microscopy. ACS NANO 2020; 14:15032-15041. [PMID: 33079538 DOI: 10.1021/acsnano.0c05010] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Visualizing live-cell uptake of small-molecule drugs is paramount for drug development and pharmaceutical sciences. Bioorthogonal imaging with click chemistry has made significant contributions to the field, visualizing small molecules in cells. Furthermore, recent developments in Raman microscopy, including stimulated Raman scattering (SRS) microscopy, have realized direct visualization of alkyne-tagged small-molecule drugs in live cells. However, Raman and SRS microscopy still suffer from limited detection sensitivity with low concentration molecules for observing temporal dynamics of drug uptake. Here, we demonstrate the combination of alkyne-tag and surface-enhanced Raman scattering (SERS) microscopy for the real-time monitoring of drug uptake in live cells. Gold nanoparticles are introduced into lysosomes of live cells by endocytosis and work as SERS probes. Raman signals of alkynes can be boosted by enhanced electric fields generated by plasmon resonance of gold nanoparticles when alkyne-tagged small molecules are colocalized with the nanoparticles. With time-lapse 3D SERS imaging, this technique allows us to investigate drug uptake by live cells with different chemical and physical conditions. We also perform quantitative evaluation of the uptake speed at the single-cell level using digital SERS counting under different quantities of drug molecules and temperature conditions. Our results illustrate that alkyne-tag SERS microscopy has a potential to be an alternative bioorthogonal imaging technique to investigate temporal dynamics of small-molecule uptake of live cells for pharmaceutical research.
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Affiliation(s)
- Kota Koike
- Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- AIST-Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology (AIST), 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Kazuki Bando
- Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Jun Ando
- Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiroyuki Yamakoshi
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, Aichi 467-8603, Japan
| | - Naoki Terayama
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Kosuke Dodo
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Nicholas Isaac Smith
- Immunology Frontier Research Center, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Mikiko Sodeoka
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Katsumasa Fujita
- Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- AIST-Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology (AIST), 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Transdimensional Life Imaging Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Santorelli D, Rocchio S, Fata F, Silvestri I, Angelucci F, Imperi F, Marasco D, Diaferia C, Gigli L, Demitri N, Federici L, Di Matteo A, Travaglini-Allocatelli C. The folding and aggregation properties of a single KH-domain protein: Ribosome binding factor A (RbfA) from Pseudomonas aeruginosa. Biochim Biophys Acta Gen Subj 2020; 1865:129780. [PMID: 33157160 DOI: 10.1016/j.bbagen.2020.129780] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 10/13/2020] [Accepted: 11/01/2020] [Indexed: 11/25/2022]
Abstract
BACKGROUND Ribosome-binding factor A from the pathogenic bacterium Pseudomonas aeruginosa (PaRbfA) is a small ribosome assembly factor, composed by a single KH domain, involved in the maturation of the 30S subunit. These domains are characterized by the ability to bind RNA or ssDNA and are often located in proteins involved in a variety of cellular functions. However, although the ability of proteins to fold properly, to misfold or to aggregate is of paramount importance for their cellular functions, limited information is available on these dynamic properties in the case of KH domains. METHODS PaRbfA thermodynamic stability and folding mechanism: Far-UV CD and fluorescence spectroscopy, stopped-flow kinetics and chevron plot analysis, site-directed mutagenesis. Fibrils characterization: FT-IR spectroscopy, Thioflavin T fluorescence, Transmission Electron Microscopy (TEM) and X-ray fibrils diffraction. RESULTS Quantitative analysis of the (un)folding kinetics of PaRbfA show that, in vitro, the protein folds via a 3-states mechanism involving a transiently populated folding intermediate. We also provide experimental evidences that PaRbfA can form ordered fibrils endowed with cross-β structure even in mild conditions. CONCLUSION These results lead to the hypothesis that the folding intermediate of PaRbfA may expose (some of) the predicted amyloidogenic regions, which could act as aggregation nuclei in the fibrillogenesis. GENERAL SIGNIFICANCE The methodological approach presented herein could be readily adapted to verify the ability of other KH domain proteins to form cross-β structured fibrils and to transiently populate a folding intermediate.
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Affiliation(s)
- D Santorelli
- Department of Biochemical Sciences "A Rossi Fanelli" - Sapienza, University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy
| | - S Rocchio
- Department of Biochemical Sciences "A Rossi Fanelli" - Sapienza, University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy; Institute of Molecular Biology and Pathology, National Research Council of Italy, c/o Department of Biochemical Sciences "A Rossi Fanelli" - Sapienza, University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - F Fata
- Department of Health, Life and Environmental Sciences, University of L'Aquila, P.le Salvatore Tommasi 1, 76100 L'Aquila, Italy
| | - I Silvestri
- Department of Health, Life and Environmental Sciences, University of L'Aquila, P.le Salvatore Tommasi 1, 76100 L'Aquila, Italy
| | - F Angelucci
- Department of Health, Life and Environmental Sciences, University of L'Aquila, P.le Salvatore Tommasi 1, 76100 L'Aquila, Italy
| | - F Imperi
- Department of Science, Roma Tre University, Viale G. Marconi 446, 00146 Rome, Italy
| | - D Marasco
- Department of Pharmacy, University of Naples "Federico II", Via Mezzocannone 16, 80134 Naples, Italy
| | - C Diaferia
- Department of Pharmacy, University of Naples "Federico II", Via Mezzocannone 16, 80134 Naples, Italy
| | - L Gigli
- Elettra - Sincrotrone Trieste, S.S. 14 Km 163.5, Area Science Park, 34149 Basovizza, Trieste, Italy
| | - N Demitri
- Elettra - Sincrotrone Trieste, S.S. 14 Km 163.5, Area Science Park, 34149 Basovizza, Trieste, Italy
| | - L Federici
- Department of Medical, Oral and Biotechnological Sciences and Center for Advanced Studies and Technology (CAST), University of Chieti "G. d'Annunzio", Via dei Vestini 31 - 66100, Chieti, Italy
| | - A Di Matteo
- Institute of Molecular Biology and Pathology, National Research Council of Italy, c/o Department of Biochemical Sciences "A Rossi Fanelli" - Sapienza, University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy.
| | - C Travaglini-Allocatelli
- Department of Biochemical Sciences "A Rossi Fanelli" - Sapienza, University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy.
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10
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A ring-shaped protein clusters gold nanoparticles acting as molecular scaffold for plasmonic surfaces. Biochim Biophys Acta Gen Subj 2020; 1864:129617. [DOI: 10.1016/j.bbagen.2020.129617] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 04/09/2020] [Accepted: 04/12/2020] [Indexed: 12/18/2022]
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11
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Antibody-Drug Conjugates: The New Frontier of Chemotherapy. Int J Mol Sci 2020; 21:ijms21155510. [PMID: 32752132 PMCID: PMC7432430 DOI: 10.3390/ijms21155510] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 12/15/2022] Open
Abstract
In recent years, antibody-drug conjugates (ADCs) have become promising antitumor agents to be used as one of the tools in personalized cancer medicine. ADCs are comprised of a drug with cytotoxic activity cross-linked to a monoclonal antibody, targeting antigens expressed at higher levels on tumor cells than on normal cells. By providing a selective targeting mechanism for cytotoxic drugs, ADCs improve the therapeutic index in clinical practice. In this review, the chemistry of ADC linker conjugation together with strategies adopted to improve antibody tolerability (by reducing antigenicity) are examined, with particular attention to ADCs approved by the regulatory agencies (the U.S. Food and Drug Administration (FDA) and the European Medicines Agency (EMA)) for treating cancer patients. Recent developments in engineering Immunoglobulin (Ig) genes and antibody humanization have greatly reduced some of the problems of the first generation of ADCs, beset by problems, such as random coupling of the payload and immunogenicity of the antibody. ADC development and clinical use is a fast, evolving area, and will likely prove an important modality for the treatment of cancer in the near future.
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da Silva RTP, Petri MV, Valencia EY, Camargo PHC, de Torresi SIC, Spira B. Visible light plasmon excitation of silver nanoparticles against antibiotic-resistant Pseudomonas aeruginosa. Photodiagnosis Photodyn Ther 2020; 31:101908. [PMID: 32634655 DOI: 10.1016/j.pdpdt.2020.101908] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 06/11/2020] [Accepted: 06/26/2020] [Indexed: 12/22/2022]
Abstract
The interaction of metallic nanoparticles with light excites a local surface plasmon resonance (LSPR). This phenomenon enables the transfer of hot electrons to substrates that release Reactive Oxygen Species (ROS). In this context, the present study aimed at enhancing the antibacterial effect of citrate-covered silver nanoparticles (AgNPs) by LSPR excitation with visible LED. AgNPs possess excellent antimicrobial properties against Pseudomonas aeruginosa, one of the most refractory organisms to antibiotic treatment. The Minimum Inhibitory Concentration (MIC) of the AgNPs was 10 μg/ml under dark conditions and 5 μg/ml under light conditions. The combination of light and AgNPs led to 100% cell death after 60 min. Flow cytometry quantification showed that bacteria treated with LSPR-stimulated AgNPs displayed 4.8 times more ROS. This significant increase in ROS possibly accounts for most of the antimicrobial effect of the AgNPs. In addition, light exposition caused a small release of silver ions (0.4%) suggesting that silver ions may play a secondary role in P. aeruginosa death. Overall, the results presented here show that LSPR stimulation of AgNPs by visible light enhances the antimicrobial activity of silver nanoparticles and can be an alternative for the treatment of topic infections caused by antibiotic-resistant bacteria such as P. aeruginosa.
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Affiliation(s)
- Rafael T P da Silva
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Brazil
| | - Marcos V Petri
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Brazil
| | - Estela Y Valencia
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, Brazil
| | - Pedro H C Camargo
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Brazil
| | - Susana I C de Torresi
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Brazil
| | - Beny Spira
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, Brazil.
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Payne TD, Moody AS, Wood AL, Pimiento PA, Elliott JC, Sharma B. Raman spectroscopy and neuroscience: from fundamental understanding to disease diagnostics and imaging. Analyst 2020; 145:3461-3480. [PMID: 32301450 DOI: 10.1039/d0an00083c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Neuroscience would directly benefit from more effective detection techniques, leading to earlier diagnosis of disease. The specificity of Raman spectroscopy is unparalleled, given that a molecular fingerprint is attained for each species. It also allows for label-free detection with relatively inexpensive instrumentation, minimal sample preparation, and rapid sample analysis. This review summarizes Raman spectroscopy-based techniques that have been used to advance the field of neuroscience in recent years.
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Affiliation(s)
- Taylor D Payne
- University of Tennessee, Knoxville, 1420 Circle Drive, Knoxville, TN 37996, USA.
| | - Amber S Moody
- National Center of Toxicological Research, 3900 NCTR Rd, Jefferson, AR 72079, USA
| | - Avery L Wood
- University of Tennessee, Knoxville, 1420 Circle Drive, Knoxville, TN 37996, USA.
| | - Paula A Pimiento
- University of Tennessee, Knoxville, 1420 Circle Drive, Knoxville, TN 37996, USA.
| | - James C Elliott
- University of Tennessee, Knoxville, 1420 Circle Drive, Knoxville, TN 37996, USA.
| | - Bhavya Sharma
- University of Tennessee, Knoxville, 1420 Circle Drive, Knoxville, TN 37996, USA.
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Kim J, Nam SH, Lim DK, Suh YD. SERS-based particle tracking and molecular imaging in live cells: toward the monitoring of intracellular dynamics. NANOSCALE 2019; 11:21724-21727. [PMID: 31495836 DOI: 10.1039/c9nr05159g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Although diverse endogenous biomolecules involved in life processes are of major interest in cell biology, there is still a lack of suitable methods for studying biomolecules within live cells without labelling. Herein, we describe a near-infrared (NIR) surface-enhanced Raman scattering (SERS)-based particle tracking technique gathering chemical information inside live cells for monitoring their intracellular dynamics. The wide-field SERS imaging spectroscopy system facilitates high temporal resolution (200 ms) under high spatial resolution (512 × 512 pixels) for one live cell. With high spatiotemporal resolution and signal-to-background ratio, we show that the Raman signal from intracellular cargoes in live cells is sporadically observed and localized to a vesicular level.
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Affiliation(s)
- Jongwoo Kim
- Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, South Korea
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Controlling the Nanoscale Gaps on Silver Island Film for Efficient Surface-Enhanced Raman Spectroscopy. NANOMATERIALS 2019; 9:nano9030470. [PMID: 30897840 PMCID: PMC6474112 DOI: 10.3390/nano9030470] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 03/18/2019] [Accepted: 03/19/2019] [Indexed: 11/17/2022]
Abstract
We control the nanoscale gaps on silver island films by different processing methods and investigate the surface-enhanced Raman scattering (SERS) efficiency on the films. We propose a facile technique to control the film morphology by substrate bending while keeping the evaporation rate constant. The films developed by our new method are compared to the films developed by traditional methods at various evaporation rates. The SERS signals generated on the samples prepared by the new method have similar strengths as the traditional methods. Substrate bending allows us to reduce the gap sizes while using a higher evaporation rate, hence the film can be developed in a shorter time. This cost-effective and time-efficient method is suitable for the mass production of large-area SERS sensors with good sensitivity. Scanning electron microscope images are analyzed to quantify the gap densities and widths to elucidate the relationship between the film morphology and the SERS intensity. While the gap size appears to be the major factor influencing the enhancement, the shape of the nano-island also seems to influence the SERS efficiency.
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Lee SH, Jun BH. Silver Nanoparticles: Synthesis and Application for Nanomedicine. Int J Mol Sci 2019; 20:ijms20040865. [PMID: 30781560 PMCID: PMC6412188 DOI: 10.3390/ijms20040865] [Citation(s) in RCA: 528] [Impact Index Per Article: 105.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 02/10/2019] [Accepted: 02/15/2019] [Indexed: 02/07/2023] Open
Abstract
Over the past few decades, metal nanoparticles less than 100 nm in diameter have made a substantial impact across diverse biomedical applications, such as diagnostic and medical devices, for personalized healthcare practice. In particular, silver nanoparticles (AgNPs) have great potential in a broad range of applications as antimicrobial agents, biomedical device coatings, drug-delivery carriers, imaging probes, and diagnostic and optoelectronic platforms, since they have discrete physical and optical properties and biochemical functionality tailored by diverse size- and shape-controlled AgNPs. In this review, we aimed to present major routes of synthesis of AgNPs, including physical, chemical, and biological synthesis processes, along with discrete physiochemical characteristics of AgNPs. We also discuss the underlying intricate molecular mechanisms behind their plasmonic properties on mono/bimetallic structures, potential cellular/microbial cytotoxicity, and optoelectronic property. Lastly, we conclude this review with a summary of current applications of AgNPs in nanoscience and nanomedicine and discuss their future perspectives in these areas.
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Affiliation(s)
- Sang Hun Lee
- Department of Bioengineering, University of California Berkeley, Berkeley, CA 94720, USA.
| | - Bong-Hyun Jun
- Department of Bioscience and Biotechnology, Konkuk University, 1 Hwayang-dong, Gwanjin-gu, Seoul 143-701, Korea.
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