1
|
Cascella R, Banchelli M, Abolghasem Ghadami S, Ami D, Gagliani MC, Bigi A, Staderini T, Tampellini D, Cortese K, Cecchi C, Natalello A, Adibi H, Matteini P, Chiti F. An in situ and in vitro investigation of cytoplasmic TDP-43 inclusions reveals the absence of a clear amyloid signature. Ann Med 2023; 55:72-88. [PMID: 36495262 PMCID: PMC9746631 DOI: 10.1080/07853890.2022.2148734] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Introduction: Several neurodegenerative conditions are associated with a common histopathology within neurons of the central nervous system, consisting of the deposition of cytoplasmic inclusions of TAR DNA-binding protein 43 (TDP-43). Such inclusions have variably been described as morphologically and molecularly ordered aggregates having amyloid properties, as filaments without the cross-β-structure and dye binding specific for amyloid, or as amorphous aggregates with no defined structure and fibrillar morphology.Aims and Methods: Here we have expressed human full-length TDP-43 in neuroblastoma x spinal cord 34 (NSC-34) cells to investigate the morphological, structural, and tinctorial properties of TDP-43 inclusions in situ. We have used last-generation amyloid diagnostic probes able to cross the cell membrane and detect amyloid in the cytoplasm and have adopted Raman and Fourier transform infrared microspectroscopies to study in situ the secondary structure of the TDP-43 protein in the inclusions. We have then used transmission electron microscopy to study the morphology of the TDP-43 inclusions.Results: The results show the absence of amyloid dye binding, the lack of an enrichment of cross-β structure in the inclusions, and of a fibrillar texture in the round inclusions. The aggregates formed in vitro from the purified protein under conditions in which it is initially native also lack all these characteristics, ruling out a clear amyloid-like signature.Conclusions: These findings indicate a low propensity of TDP-43 to form amyloid fibrils and even non-amyloid filaments, under conditions in which the protein is initially native and undergoes its typical nucleus-to-cell mislocalization. It cannot be excluded that filaments emerge on the long time scale from such inclusions, but the high propensity of the protein to form initially other types of inclusions appear to be an essential characteristic of TDP-43 proteinopathies.KEY MESSAGESCytoplasmic inclusions of TDP-43 formed in NSC-34 cells do not stain with amyloid-diagnostic dyes, are not enriched with cross-β structure, and do not show a fibrillar morphology.TDP-43 assemblies formed in vitro from pure TDP-43 do not have any hallmarks of amyloid.
Collapse
Affiliation(s)
- Roberta Cascella
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy
| | - Martina Banchelli
- Institute of Applied Physics "Nello Carrara", National Research Council, Sesto Fiorentino, Italy
| | | | - Diletta Ami
- Department of Biotechnologies and Biosciences, University of Milano-Bicocca, Milan, Italy.,Milan Center of Neuroscience (NeuroMI), Milan, Italy
| | - Maria Cristina Gagliani
- Cellular Electron Microscopy Laboratory, Department of Experimental Medicine, University of Genova, Genoa, Italy
| | - Alessandra Bigi
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy
| | - Tommaso Staderini
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy
| | - Davide Tampellini
- U 1195 INSERM-Université Paris-Saclay, Paris, France.,Institut Professeur Baulieu, Paris, France
| | - Katia Cortese
- Cellular Electron Microscopy Laboratory, Department of Experimental Medicine, University of Genova, Genoa, Italy
| | - Cristina Cecchi
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy
| | - Antonino Natalello
- Department of Biotechnologies and Biosciences, University of Milano-Bicocca, Milan, Italy.,Milan Center of Neuroscience (NeuroMI), Milan, Italy
| | - Hadi Adibi
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Paolo Matteini
- Institute of Applied Physics "Nello Carrara", National Research Council, Sesto Fiorentino, Italy
| | - Fabrizio Chiti
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy
| |
Collapse
|
2
|
Banchelli M, Tombelli S, de Angelis M, D'Andrea C, Trono C, Baldini F, Giannetti A, Matteini P. Molecular beacon decorated silver nanowires for quantitative miRNA detection by a SERS approach. Anal Methods 2023; 15:6165-6176. [PMID: 37961002 DOI: 10.1039/d3ay01661g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Advantages of biosensors based on surface enhanced Raman scattering (SERS) rely on improved sensitivity and specificity, and suited reproducibility in detecting a target molecule that is localized in close proximity to a SERS-active surface. Herein, a comprehensive study on the realization of a SERS biosensor designed for detecting miRNA-183, a miRNA biomarker that is specific for chronic obstructive pulmonary disease (COPD), is presented. The used strategy exploits a signal-off mechanism by means of a labelled molecular beacon (MB) as the oligonucleotide biorecognition element immobilized on a 2D SERS substrate, based on spot-on silver nanowires (AgNWs) and a multi-well low volume cell. The MB was properly designed by following a dedicated protocol to recognize the chosen miRNA. A limit of detection down to femtomolar concentration (3 × 10-16 M) was achieved and the specificity of the biosensor was proved. Furthermore, the possibility to regenerate the sensing system through a simple procedure is shown: with regeneration by using HCl 1 mM, two detection cycles were performed with a good recovery of the initial MB signal (83%) and a reproducible signal after hybridization.
Collapse
Affiliation(s)
- Martina Banchelli
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Sara Tombelli
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Marella de Angelis
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Cristiano D'Andrea
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Cosimo Trono
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Francesco Baldini
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Ambra Giannetti
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Paolo Matteini
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| |
Collapse
|
3
|
D'Andrea C, Cazzaniga FA, Bistaffa E, Barucci A, de Angelis M, Banchelli M, Farnesi E, Polykretis P, Marzi C, Indaco A, Tiraboschi P, Giaccone G, Matteini P, Moda F. Impact of seed amplification assay and surface-enhanced Raman spectroscopy combined approach on the clinical diagnosis of Alzheimer's disease. Transl Neurodegener 2023; 12:35. [PMID: 37438825 DOI: 10.1186/s40035-023-00367-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 06/12/2023] [Indexed: 07/14/2023] Open
Abstract
BACKGROUND The current diagnosis of Alzheimer's disease (AD) is based on a series of analyses which involve clinical, instrumental and laboratory findings. However, signs, symptoms and biomarker alterations observed in AD might overlap with other dementias, resulting in misdiagnosis. METHODS Here we describe a new diagnostic approach for AD which takes advantage of the boosted sensitivity in biomolecular detection, as allowed by seed amplification assay (SAA), combined with the unique specificity in biomolecular recognition, as provided by surface-enhanced Raman spectroscopy (SERS). RESULTS The SAA-SERS approach supported by machine learning data analysis allowed efficient identification of pathological Aβ oligomers in the cerebrospinal fluid of patients with a clinical diagnosis of AD or mild cognitive impairment due to AD. CONCLUSIONS Such analytical approach can be used to recognize disease features, thus allowing early stratification and selection of patients, which is fundamental in clinical treatments and pharmacological trials.
Collapse
Affiliation(s)
- Cristiano D'Andrea
- Institute of Applied Physics "Nello Carrara", National Research Council, 50019, Sesto Fiorentino, Italy
| | - Federico Angelo Cazzaniga
- Division of Neurology 5 and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20133, Milan, Italy
| | - Edoardo Bistaffa
- Division of Neurology 5 and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20133, Milan, Italy
| | - Andrea Barucci
- Institute of Applied Physics "Nello Carrara", National Research Council, 50019, Sesto Fiorentino, Italy
| | - Marella de Angelis
- Institute of Applied Physics "Nello Carrara", National Research Council, 50019, Sesto Fiorentino, Italy
| | - Martina Banchelli
- Institute of Applied Physics "Nello Carrara", National Research Council, 50019, Sesto Fiorentino, Italy
| | - Edoardo Farnesi
- Institute of Physical Chemistry (IPC) and Abbe Center of Photonics (ACP), Friedrich Schiller University Jena, 07743, Jena, Germany
- Leibniz Institute of Photonic Technology, 07745, Jena, Germany
| | - Panagis Polykretis
- Institute of Applied Physics "Nello Carrara", National Research Council, 50019, Sesto Fiorentino, Italy
| | - Chiara Marzi
- Institute of Applied Physics "Nello Carrara", National Research Council, 50019, Sesto Fiorentino, Italy
| | - Antonio Indaco
- Division of Neurology 5 and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20133, Milan, Italy
| | - Pietro Tiraboschi
- Division of Neurology 5 and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20133, Milan, Italy
| | - Giorgio Giaccone
- Division of Neurology 5 and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20133, Milan, Italy
| | - Paolo Matteini
- Institute of Applied Physics "Nello Carrara", National Research Council, 50019, Sesto Fiorentino, Italy.
| | - Fabio Moda
- Division of Neurology 5 and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20133, Milan, Italy.
| |
Collapse
|
4
|
Polykretis P, Banchelli M, D'Andrea C, de Angelis M, Matteini P. Raman Spectroscopy Techniques for the Investigation and Diagnosis of Alzheimer's Disease. Front Biosci (Schol Ed) 2022; 14:22. [PMID: 36137977 DOI: 10.31083/j.fbs1403022] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 05/04/2022] [Accepted: 05/10/2022] [Indexed: 06/16/2023]
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disorder, resulting in memory loss, cognitive decline, bodily function impairment, and finally death. The growing number of people suffering from AD increasingly urges the development of effective early diagnosis and monitoring techniques. Here, we review the most recent developments in the field of Raman-based techniques, which have shown a significant potential in identifying AD by detecting specific biomarkers in biological fluids, as well as in providing fundamental insights into key molecules involved in the disease progression or in the analysis of histological specimens of patients with AD. These techniques comprise spontaneous and resonant Raman spectroscopies, exploit plasmon- or fiber- enhanced effects, such as surface-, tip- or fiber- enhanced Raman spectroscopies, or involve non-linear techniques like coherent Raman scattering. The scientific efforts employed up to now as well as the rapid technological advancements in optical detection instruments (spectrometers, lasers, substrates for analysis, etc.) and the diffusion of advanced data processing methods suggest a leading role of Raman techniques in the perspective of a preclinical or clinical detection of AD.
Collapse
Affiliation(s)
- Panagis Polykretis
- Institute of Applied Physics "Nello Carrara", National Research Council, 50019 Sesto Fiorentino, Italy
| | - Martina Banchelli
- Institute of Applied Physics "Nello Carrara", National Research Council, 50019 Sesto Fiorentino, Italy
| | - Cristiano D'Andrea
- Institute of Applied Physics "Nello Carrara", National Research Council, 50019 Sesto Fiorentino, Italy
| | - Marella de Angelis
- Institute of Applied Physics "Nello Carrara", National Research Council, 50019 Sesto Fiorentino, Italy
| | - Paolo Matteini
- Institute of Applied Physics "Nello Carrara", National Research Council, 50019 Sesto Fiorentino, Italy
| |
Collapse
|
5
|
Valt M, Caporali M, Fabbri B, Gaiardo A, Krik S, Iacob E, Vanzetti L, Malagù C, Banchelli M, D’Andrea C, Serrano-Ruiz M, Vanni M, Peruzzini M, Guidi V. Air Stable Nickel-Decorated Black Phosphorus and Its Room-Temperature Chemiresistive Gas Sensor Capabilities. ACS Appl Mater Interfaces 2021; 13:44711-44722. [PMID: 34506713 PMCID: PMC8461602 DOI: 10.1021/acsami.1c10763] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Indexed: 06/13/2023]
Abstract
In the rapidly emerging field of layered two-dimensional functional materials, black phosphorus, the P-counterpart of graphene, is a potential candidate for various applications, e.g., nanoscale optoelectronics, rechargeable ion batteries, electrocatalysts, thermoelectrics, solar cells, and sensors. Black phosphorus has shown superior chemical sensing performance; in particular, it is selective for the detection of NO2, an environmental toxic gas, for which black phosphorus has highlighted high sensitivity at a ppb level. In this work, by applying a multiscale characterization approach, we demonstrated a stability and functionality improvement of nickel-decorated black phosphorus films for gas sensing prepared by a simple, reproducible, and affordable deposition technique. Furthermore, we studied the electrical behavior of these films once implemented as functional layers in gas sensors by exposing them to different gaseous compounds and under different relative humidity conditions. Finally, the influence on sensing performance of nickel nanoparticle dimensions and concentration correlated to the decoration technique and film thickness was investigated.
Collapse
Affiliation(s)
- Matteo Valt
- Department
of Physics and Earth Sciences, University
of Ferrara, Via G. Saragat 1/C, Ferrara 44122, Italy
| | - Maria Caporali
- Italian
National Council for Research - Institute for the Chemistry of OrganoMetallic
Compounds (CNR ICCOM), Via Madonna del Piano 10, Sesto Fiorentino 50019, Italy
| | - Barbara Fabbri
- Department
of Physics and Earth Sciences, University
of Ferrara, Via G. Saragat 1/C, Ferrara 44122, Italy
| | - Andrea Gaiardo
- MNF
- Micro Nano Facility Unit, Sensors and Devices Center, Bruno Kessler Foundation, Via Sommarive 18, Trento 38123, Italy
| | - Soufiane Krik
- Department
of Physics and Earth Sciences, University
of Ferrara, Via G. Saragat 1/C, Ferrara 44122, Italy
- MNF
- Micro Nano Facility Unit, Sensors and Devices Center, Bruno Kessler Foundation, Via Sommarive 18, Trento 38123, Italy
| | - Erica Iacob
- MNF
- Micro Nano Facility Unit, Sensors and Devices Center, Bruno Kessler Foundation, Via Sommarive 18, Trento 38123, Italy
| | - Lia Vanzetti
- MNF
- Micro Nano Facility Unit, Sensors and Devices Center, Bruno Kessler Foundation, Via Sommarive 18, Trento 38123, Italy
| | - Cesare Malagù
- Department
of Physics and Earth Sciences, University
of Ferrara, Via G. Saragat 1/C, Ferrara 44122, Italy
| | - Martina Banchelli
- Italian
National Council for Research, Institute of Applied Physics “Nello
Carrara”, Via Madonna del Piano 10, Sesto Fiorentino 50019, Italy
| | - Cristiano D’Andrea
- Italian
National Council for Research, Institute of Applied Physics “Nello
Carrara”, Via Madonna del Piano 10, Sesto Fiorentino 50019, Italy
| | - Manuel Serrano-Ruiz
- Italian
National Council for Research - Institute for the Chemistry of OrganoMetallic
Compounds (CNR ICCOM), Via Madonna del Piano 10, Sesto Fiorentino 50019, Italy
| | - Matteo Vanni
- Italian
National Council for Research - Institute for the Chemistry of OrganoMetallic
Compounds (CNR ICCOM), Via Madonna del Piano 10, Sesto Fiorentino 50019, Italy
| | - Maurizio Peruzzini
- Italian
National Council for Research - Institute for the Chemistry of OrganoMetallic
Compounds (CNR ICCOM), Via Madonna del Piano 10, Sesto Fiorentino 50019, Italy
| | - Vincenzo Guidi
- Department
of Physics and Earth Sciences, University
of Ferrara, Via G. Saragat 1/C, Ferrara 44122, Italy
| |
Collapse
|
6
|
Berneschi S, D'Andrea C, Baldini F, Banchelli M, de Angelis M, Pelli S, Pini R, Pugliese D, Boetti NG, Janner D, Milanese D, Giannetti A, Matteini P. Ion-exchanged glass microrods as hybrid SERS/fluorescence substrates for molecular beacon-based DNA detection. Anal Bioanal Chem 2021; 413:6171-6182. [PMID: 34278523 DOI: 10.1007/s00216-021-03418-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/07/2021] [Accepted: 05/19/2021] [Indexed: 11/26/2022]
Abstract
Ion-exchange in molten nitrate salts containing metal ions (i.e. silver, copper, etc.) represents a well-established technique able to modify the chemical-physical properties of glass materials. It is widely used not only in the field of integrated optics (IO) but also, more recently, in plasmonics due to the possibility to induce the formation of metal nanoparticles in the glass matrix by an ad hoc thermal post-process. In this work, the application of this technology for the realisation of low-cost and stable surface-enhanced Raman scattering (SERS) active substrates, based on soda-lime glass microrods, is reported. The microrods, with a radius of a few tens of microns, were obtained by cutting the end of an ion-exchanged soda-lime fibre for a length less than 1 cm. As ion source, silver nitrate was selected due to the outstanding SERS properties of silver. The ion-exchange and thermal annealing post-process parameters were tuned to expose the embedded silver nanoparticles on the surface of the glass microrods, avoiding the use of any further chemical etching step. In order to test the combined SERS/fluorescence response of these substrates, labelled molecular beacons (MBs) were immobilised on their surface for deoxyribonucleic acid (DNA) detection. Our experiments confirm that target DNA is attached on the silver nanoparticles and its presence is revealed by both SERS and fluorescence measurements. These results pave the way towards the development of low-cost and stable hybrid fibres, in which SERS and fluorescence interrogation techniques are combined in the same optical device.
Collapse
Affiliation(s)
- Simone Berneschi
- Institute of Applied Physics "Nello Carrara", IFAC - CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, FI, Italy
| | - Cristiano D'Andrea
- Institute of Applied Physics "Nello Carrara", IFAC - CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, FI, Italy
| | - Francesco Baldini
- Institute of Applied Physics "Nello Carrara", IFAC - CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, FI, Italy
| | - Martina Banchelli
- Institute of Applied Physics "Nello Carrara", IFAC - CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, FI, Italy
| | - Marella de Angelis
- Institute of Applied Physics "Nello Carrara", IFAC - CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, FI, Italy
| | - Stefano Pelli
- Institute of Applied Physics "Nello Carrara", IFAC - CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, FI, Italy
| | - Roberto Pini
- Institute of Applied Physics "Nello Carrara", IFAC - CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, FI, Italy
| | - Diego Pugliese
- Department of Applied Science and Technology and RU INSTM, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Turin, Italy
| | - Nadia G Boetti
- Fondazione LINKS-Leading Innovation and Knowledge for Society, via P. C. Boggio 61, 10138, Turin, Italy
| | - Davide Janner
- Department of Applied Science and Technology and RU INSTM, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Turin, Italy
| | - Daniel Milanese
- Department of Engineering and Architecture and RU INSTM, Università di Parma, Parco Area delle Scienze 181/A, 43124, Parma, Italy
| | - Ambra Giannetti
- Institute of Applied Physics "Nello Carrara", IFAC - CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, FI, Italy.
| | - Paolo Matteini
- Institute of Applied Physics "Nello Carrara", IFAC - CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, FI, Italy
| |
Collapse
|
7
|
Vanni M, Bellini M, Borsacchi S, Calucci L, Caporali M, Caporali S, d'Acapito F, Geppi M, Giaccherini A, Ienco A, Manca G, Mio AM, Nicotra G, Oberhauser W, Serrano-Ruiz M, Banchelli M, Vizza F, Peruzzini M. Interlayer Coordination of Pd-Pd Units in Exfoliated Black Phosphorus. J Am Chem Soc 2021; 143:10088-10098. [PMID: 34185506 PMCID: PMC9295127 DOI: 10.1021/jacs.1c01754] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
![]()
The chemical functionalization of
2D exfoliated black phosphorus
(2D BP) continues to attract great interest, although a satisfactory
structural characterization of the functionalized material has seldom
been achieved. Herein, we provide the first complete structural characterization
of 2D BP functionalized with rare discrete Pd2 units, obtained
through a mild decomposition of the organometallic dimeric precursor
[Pd(η3-C3H5)Cl]2. A multitechnique approach, including HAADF-STEM, solid-state NMR,
XPS, and XAS, was used to study in detail the morphology of the palladated
nanosheets (Pd2/BP) and to unravel the coordination of
Pd2 units to phosphorus atoms of 2D BP. In particular,
XAS, backed up by DFT modeling, revealed the existence of unprecedented
interlayer Pd–Pd units, sandwiched between stacked BP layers.
The preliminary application of Pd2/BP as a catalyst for
the hydrogen evolution reaction (HER) in acidic medium highlighted
an activity increase due to the presence of Pd2 units.
Collapse
Affiliation(s)
- Matteo Vanni
- Institute for the Chemistry of Organometallic Compounds (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy.,Department of Biotechnology, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy
| | - Marco Bellini
- Institute for the Chemistry of Organometallic Compounds (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Silvia Borsacchi
- Institute for the Chemistry of Organometallic Compounds (CNR-ICCOM), SS Pisa, Via Moruzzi 1, 56124 Pisa, Italy.,Center for Instrument Sharing of the University of Pisa (CISUP), Lungarno Pacinotti 43/44, 56126 Pisa, Italy
| | - Lucia Calucci
- Institute for the Chemistry of Organometallic Compounds (CNR-ICCOM), SS Pisa, Via Moruzzi 1, 56124 Pisa, Italy.,Center for Instrument Sharing of the University of Pisa (CISUP), Lungarno Pacinotti 43/44, 56126 Pisa, Italy
| | - Maria Caporali
- Institute for the Chemistry of Organometallic Compounds (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Stefano Caporali
- Department of Industrial Engineering, University of Florence, Via di S. Marta 3, 50139 Firenze, Italy
| | - Francesco d'Acapito
- CNR-IOM-OGG c/o European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble Cedex 9, France
| | - Marco Geppi
- Center for Instrument Sharing of the University of Pisa (CISUP), Lungarno Pacinotti 43/44, 56126 Pisa, Italy.,Department of Chemistry and Industrial Chemistry (DCCI), University of Pisa, Via Moruzzi 13, 56121 Pisa, Italy
| | - Andrea Giaccherini
- Department of Earth Sciences, University of Florence, Via La Pira 4, 50121 Firenze, Italy
| | - Andrea Ienco
- Institute for the Chemistry of Organometallic Compounds (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Gabriele Manca
- Institute for the Chemistry of Organometallic Compounds (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Antonio Massimiliano Mio
- Institute for Microelectronics and Microsystems (CNR-IMM), VIII strada 5, I-95121 Catania, Italy
| | - Giuseppe Nicotra
- Institute for Microelectronics and Microsystems (CNR-IMM), VIII strada 5, I-95121 Catania, Italy
| | - Werner Oberhauser
- Institute for the Chemistry of Organometallic Compounds (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Manuel Serrano-Ruiz
- Institute for the Chemistry of Organometallic Compounds (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Martina Banchelli
- Institute of Applied Physics "Nello Carrara" (CNR-IFAC), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Francesco Vizza
- Institute for the Chemistry of Organometallic Compounds (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Maurizio Peruzzini
- Institute for the Chemistry of Organometallic Compounds (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| |
Collapse
|
8
|
Rossi F, Magni G, Colasanti R, Banchelli M, Iacoangeli M, Carrassi E, Aiudi D, Di Rienzo A, Giannoni L, Pieri L, Dallari S, Pini R, Matteini P. Characterization and Ex Vivo Application of Indocyanine Green Chitosan Patches in Dura Mater Laser Bonding. Polymers (Basel) 2021; 13:polym13132130. [PMID: 34209537 PMCID: PMC8271756 DOI: 10.3390/polym13132130] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/26/2021] [Accepted: 06/21/2021] [Indexed: 12/26/2022] Open
Abstract
Dura mater repair represents a final and crucial step in neurosurgery: an inadequate dural reconstruction determines dreadful consequences that significantly increase morbidity and mortality rates. Different dural substitutes have been used with suboptimal results. To overcome this issue, in previous studies, we proposed a laser-based approach to the bonding of porcine dura mater, evidencing the feasibility of the laser-assisted procedure. In this work, we present the optimization of this approach in ex vivo experiments performed on porcine dura mater. An 810-nm continuous-wave AlGaAs (Aluminium Gallium Arsenide) diode laser was used for welding Indocyanine Green-loaded patches (ICG patches) to the dura. The ICG-loaded patches were fabricated using chitosan, a resistant, pliable and stable in the physiological environment biopolymer; moreover, their absorption peak was very close to the laser emission wavelength. Histology, thermal imaging and leak pressure tests were used to evaluate the bonding effect. We demonstrated that the application of 3 watts (W), pulsed mode (Ton 30 ms, Toff 3.5 ms) laser light induces optimal welding of the ICG patch to the dura mater, ensuring an average fluid leakage pressure of 216 ± 105 mmHg, falling within the range of physiological parameters. This study demonstrated that the thermal effect is limited and spatially confined and that the laser bonding procedure can be used to close the dura mater. Our results showed the effectiveness of this approach and encourage further experiments in in vivo models.
Collapse
Affiliation(s)
- Francesca Rossi
- Istituto di Fisica Applicata “Nello Carrara”, Consiglio Nazionale delle Ricerche, Sesto Fiorentino, 50019 Florence, Italy; (F.R.); (R.P.); (P.M.)
| | - Giada Magni
- Istituto di Fisica Applicata “Nello Carrara”, Consiglio Nazionale delle Ricerche, Sesto Fiorentino, 50019 Florence, Italy; (F.R.); (R.P.); (P.M.)
- Correspondence: (G.M.); (R.C.); (M.B.)
| | - Roberto Colasanti
- Department of Neurosurgery, Università Politecnica delle Marche, 60121 Ancona, Italy; (M.I.); (E.C.); (D.A.); (A.D.R.)
- Department of Neurosurgery, Padua University Hospital, 35128 Padua, Italy
- Correspondence: (G.M.); (R.C.); (M.B.)
| | - Martina Banchelli
- Istituto di Fisica Applicata “Nello Carrara”, Consiglio Nazionale delle Ricerche, Sesto Fiorentino, 50019 Florence, Italy; (F.R.); (R.P.); (P.M.)
- Correspondence: (G.M.); (R.C.); (M.B.)
| | - Maurizio Iacoangeli
- Department of Neurosurgery, Università Politecnica delle Marche, 60121 Ancona, Italy; (M.I.); (E.C.); (D.A.); (A.D.R.)
| | - Erika Carrassi
- Department of Neurosurgery, Università Politecnica delle Marche, 60121 Ancona, Italy; (M.I.); (E.C.); (D.A.); (A.D.R.)
| | - Denis Aiudi
- Department of Neurosurgery, Università Politecnica delle Marche, 60121 Ancona, Italy; (M.I.); (E.C.); (D.A.); (A.D.R.)
| | - Alessandro Di Rienzo
- Department of Neurosurgery, Università Politecnica delle Marche, 60121 Ancona, Italy; (M.I.); (E.C.); (D.A.); (A.D.R.)
| | - Luca Giannoni
- El.En. S.p.A., Calenzano, 50041 Florence, Italy; (L.G.); (L.P.)
| | - Laura Pieri
- El.En. S.p.A., Calenzano, 50041 Florence, Italy; (L.G.); (L.P.)
| | | | - Roberto Pini
- Istituto di Fisica Applicata “Nello Carrara”, Consiglio Nazionale delle Ricerche, Sesto Fiorentino, 50019 Florence, Italy; (F.R.); (R.P.); (P.M.)
| | - Paolo Matteini
- Istituto di Fisica Applicata “Nello Carrara”, Consiglio Nazionale delle Ricerche, Sesto Fiorentino, 50019 Florence, Italy; (F.R.); (R.P.); (P.M.)
| |
Collapse
|
9
|
Amicucci C, D’Andrea C, de Angelis M, Banchelli M, Pini R, Matteini P. Cost Effective Silver Nanowire-Decorated Graphene Paper for Drop-On SERS Biodetection. Nanomaterials (Basel) 2021; 11:nano11061495. [PMID: 34200106 PMCID: PMC8229787 DOI: 10.3390/nano11061495] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 05/31/2021] [Accepted: 06/02/2021] [Indexed: 12/17/2022]
Abstract
The use of SERS for real-world bioanalytical applications represents a concrete opportunity, which, however, is being largely delayed by the inadequacy of existing substrates used to collect SERS spectra. In particular, the main bottleneck is their poor usability, as in the case of unsupported noble metal colloidal nanoparticles or because of the need for complex or highly specialized fabrication procedures, especially in view of a large-scale commercial diffusion. In this work, we introduce a graphene paper-supported plasmonic substrate for biodetection as obtained by a simple and rapid aerosol deposition patterning of silver nanowires. This substrate is compatible with the analysis of small (2 μL) analyte drops, providing stable SERS signals at sub-millimolar concentration and a detection limit down to the nanogram level in the case of hemoglobin. The presence of a graphene underlayer assures an even surface distribution of SERS hotspots with improved stability of the SERS signal, the collection of well-resolved and intense SERS spectra, and an ultra-flat and photostable SERS background in comparison with other popular disposable supports.
Collapse
Affiliation(s)
- Chiara Amicucci
- “Nello Carrara” Institute of Applied Physics (IFAC), Italian National Research Council (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy; (C.A.); (C.D.); (M.d.A.); (M.B.); (R.P.)
- Department of Industrial Engineering, University of Florence, Via Santa Marta 3, 50134 Florence, Italy
| | - Cristiano D’Andrea
- “Nello Carrara” Institute of Applied Physics (IFAC), Italian National Research Council (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy; (C.A.); (C.D.); (M.d.A.); (M.B.); (R.P.)
| | - Marella de Angelis
- “Nello Carrara” Institute of Applied Physics (IFAC), Italian National Research Council (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy; (C.A.); (C.D.); (M.d.A.); (M.B.); (R.P.)
| | - Martina Banchelli
- “Nello Carrara” Institute of Applied Physics (IFAC), Italian National Research Council (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy; (C.A.); (C.D.); (M.d.A.); (M.B.); (R.P.)
| | - Roberto Pini
- “Nello Carrara” Institute of Applied Physics (IFAC), Italian National Research Council (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy; (C.A.); (C.D.); (M.d.A.); (M.B.); (R.P.)
| | - Paolo Matteini
- “Nello Carrara” Institute of Applied Physics (IFAC), Italian National Research Council (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy; (C.A.); (C.D.); (M.d.A.); (M.B.); (R.P.)
- Correspondence:
| |
Collapse
|
10
|
Banchelli M, Cascella R, D’Andrea C, La Penna G, Li MS, Machetti F, Matteini P, Pizzanelli S. Probing the Structure of Toxic Amyloid-β Oligomers with Electron Spin Resonance and Molecular Modeling. ACS Chem Neurosci 2021; 12:1150-1161. [PMID: 33724783 PMCID: PMC9284516 DOI: 10.1021/acschemneuro.0c00714] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Structural models of the toxic species involved in the development of Alzheimer's disease are of utmost importance to understand the molecular mechanism and to describe early biomarkers of the disease. Among toxic species, soluble oligomers of amyloid-β (Aβ) peptides are particularly important, because they are responsible for spreading cell damages over brain regions, thus rapidly impairing brain functions. In this work we obtain structural information on a carefully prepared Aβ(1-42) sample, representing a toxic state for cell cultures, by combining electron spin resonance spectroscopy and computational models. We exploited the binding of Cu2+ to Aβ(1-42) and used copper as a probe for estimating Cu-Cu distances in the oligomers by applying double electron-electron resonance (DEER) pulse sequence. The DEER trace of this sample displays a unique feature that fits well with structural models of oligomers formed by Cu-cross-linked peptide dimers. Because Cu is bound to the Aβ(1-42) N-terminus, for the first time structural constraints that are missing in reported studies are provided at physiological conditions for the Aβ N-termini. These constraints suggest the Aβ(1-42) dimer as the building block of soluble oligomers, thus changing the scenario for any kinetic model of Aβ(1-42) aggregation.
Collapse
Affiliation(s)
- Martina Banchelli
- National Research Council of Italy, Institute of Applied Physics “Nello Carrara”, Sesto Fiorentino, I-50019 FI, Italy
| | - Roberta Cascella
- University of Florence, Department of Experimental and Clinical Biomedical Sciences, I-50134 Firenze, Italy
| | - Cristiano D’Andrea
- National Research Council of Italy, Institute of Applied Physics “Nello Carrara”, Sesto Fiorentino, I-50019 FI, Italy
| | - Giovanni La Penna
- National Research Council of Italy (CNR), Institute of Chemistry of Organometallic Compounds (ICCOM), Sesto Fiorentino, I-50019 FI, Italy
- National Institute for Nuclear Physics (INFN),
Section of Roma-Tor Vergata, I-00133 Roma, Italy
| | - Mai Suan Li
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland
- Institute for Computational Science and Technology, 6 Quarter, Linh Trung Ward, Thu
Duc District, 700000 Ho Chi Minh City, Vietnam
| | - Fabrizio Machetti
- National Research Council of Italy (CNR), Institute of Chemistry of Organometallic Compounds (ICCOM), Sesto Fiorentino, I-50019 FI, Italy
- University of Florence, Department of Chemistry “Ugo Schiff”, Sesto Fiorentino, I-50019 FI, Italy
| | - Paolo Matteini
- National Research Council of Italy, Institute of Applied Physics “Nello Carrara”, Sesto Fiorentino, I-50019 FI, Italy
| | - Silvia Pizzanelli
- National Research Council of Italy (CNR), Institute of Chemistry of Organometallic Compounds (ICCOM), I-56124 Pisa, Italy
| |
Collapse
|
11
|
Rossi F, Magni G, Tatini F, Banchelli M, Cherchi F, Rossi M, Coppi E, Pugliese AM, Rossi degl’Innocenti D, Alfieri D, Pavone FS, Pini R, Matteini P. Photobiomodulation of Human Fibroblasts and Keratinocytes with Blue Light: Implications in Wound Healing. Biomedicines 2021; 9:biomedicines9010041. [PMID: 33466557 PMCID: PMC7824830 DOI: 10.3390/biomedicines9010041] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/18/2020] [Accepted: 12/29/2020] [Indexed: 12/15/2022] Open
Abstract
In recent years, photobiomodulation (PBM) has been recognized as a physical therapy in wound management. Despite several published research papers, the mechanism underlying photobiomodulation is still not completely understood. The investigation about application of blue light to improve wound healing is a relatively new research area. Tests in selected patients evidenced a stimulation of the healing process in superficial and chronic wounds treated with a blue LED light emitting at 420 nm; a study in animal model pointed out a faster healing process in superficial wound, with an important role of fibroblasts and myofibroblasts. Here, we present a study aiming at evidencing the effects of blue light on the proliferation and metabolism in fibroblasts from healthy skin and keratinocytes. Different light doses (3.43, 6.87, 13.7, 20.6, 30.9 and 41.2 J/cm2) were used to treat the cells, evidencing inhibitory and stimulatory effects following a biphasic dose behavior. Electrophysiology was used to investigate the effects on membrane currents: healthy fibroblasts and keratinocytes showed no significant differences between treated and not treated cells. Raman spectroscopy revealed the mitochondrial Cytochrome C (Cyt C) oxidase dependence on blue light irradiation: a significant decrease in peak intensity of healthy fibroblast was evidenced, while it is less pronounced in keratinocytes. In conclusion, we observed that the blue LED light can be used to modulate metabolism and proliferation of human fibroblasts, and the effects in wound healing are particularly evident when studying the fibroblasts and keratinocytes co-cultures.
Collapse
Affiliation(s)
- Francesca Rossi
- Istituto di Fisica Applicata “Nello Carrara”, Consiglio Nazionale delle Ricerche (CNR-IFAC), 50019 Florence, Italy; (F.R.); (F.T.); (M.R.); (R.P.); (P.M.)
| | - Giada Magni
- Istituto di Fisica Applicata “Nello Carrara”, Consiglio Nazionale delle Ricerche (CNR-IFAC), 50019 Florence, Italy; (F.R.); (F.T.); (M.R.); (R.P.); (P.M.)
- Correspondence: (G.M.); (M.B.); (A.M.P.)
| | - Francesca Tatini
- Istituto di Fisica Applicata “Nello Carrara”, Consiglio Nazionale delle Ricerche (CNR-IFAC), 50019 Florence, Italy; (F.R.); (F.T.); (M.R.); (R.P.); (P.M.)
| | - Martina Banchelli
- Istituto di Fisica Applicata “Nello Carrara”, Consiglio Nazionale delle Ricerche (CNR-IFAC), 50019 Florence, Italy; (F.R.); (F.T.); (M.R.); (R.P.); (P.M.)
- Correspondence: (G.M.); (M.B.); (A.M.P.)
| | - Federica Cherchi
- Department of Neuroscience, Psychology, Drug Research and Child Health, Section of Pharmacology and Toxicology, University of Florence, 50139 Florence, Italy; (F.C.); (E.C.)
| | - Michele Rossi
- Istituto di Fisica Applicata “Nello Carrara”, Consiglio Nazionale delle Ricerche (CNR-IFAC), 50019 Florence, Italy; (F.R.); (F.T.); (M.R.); (R.P.); (P.M.)
| | - Elisabetta Coppi
- Department of Neuroscience, Psychology, Drug Research and Child Health, Section of Pharmacology and Toxicology, University of Florence, 50139 Florence, Italy; (F.C.); (E.C.)
| | - Anna Maria Pugliese
- Department of Neuroscience, Psychology, Drug Research and Child Health, Section of Pharmacology and Toxicology, University of Florence, 50139 Florence, Italy; (F.C.); (E.C.)
- Correspondence: (G.M.); (M.B.); (A.M.P.)
| | | | - Domenico Alfieri
- EmoLED s.r.l., Sesto Fiorentino, 50019 Florence, Italy; (D.R.d.); (D.A.)
| | - Francesco S. Pavone
- Department of Physics, University of Florence, 50019 Florence, Italy;
- European Laboratory for Non-Linear Spectroscopy (LENS), 50019 Florence, Italy
- Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche (CNR-INO), 50125 Florence, Italy
| | - Roberto Pini
- Istituto di Fisica Applicata “Nello Carrara”, Consiglio Nazionale delle Ricerche (CNR-IFAC), 50019 Florence, Italy; (F.R.); (F.T.); (M.R.); (R.P.); (P.M.)
| | - Paolo Matteini
- Istituto di Fisica Applicata “Nello Carrara”, Consiglio Nazionale delle Ricerche (CNR-IFAC), 50019 Florence, Italy; (F.R.); (F.T.); (M.R.); (R.P.); (P.M.)
| |
Collapse
|
12
|
Barucci A, D'Andrea C, Farnesi E, Banchelli M, Amicucci C, de Angelis M, Hwang B, Matteini P. Label-free SERS detection of proteins based on machine learning classification of chemo-structural determinants. Analyst 2020; 146:674-682. [PMID: 33210104 DOI: 10.1039/d0an02137g] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Establishing standardized methods for a consistent analysis of spectral data remains a largely underexplored aspect in surface-enhanced Raman spectroscopy (SERS), particularly applied to biological and biomedical research. Here we propose an effective machine learning classification of protein species with closely resembled spectral profiles by a mixed data processing based on principal component analysis (PCA) applied to multipeak fitting on SERS spectra. This strategy simultaneously assures a successful discrimination of proteins and a thorough characterization of the chemostructural differences among them, ultimately opening up new routes for SERS evolution toward sensing applications and diagnostics of interest in life sciences.
Collapse
Affiliation(s)
- Andrea Barucci
- Institute of Applied Physics "Nello Carrara", Italian National Research Council, via Madonna del Piano 10, Sesto Fiorentino, I-50019, Italy.
| | | | | | | | | | | | | | | |
Collapse
|
13
|
Eravuchira PJ, Banchelli M, D’Andrea C, de Angelis M, Matteini P, Gannot I. Hollow core photonic crystal fiber-assisted Raman spectroscopy as a tool for the detection of Alzheimer's disease biomarkers. J Biomed Opt 2020; 25:1-10. [PMID: 32618152 PMCID: PMC7330420 DOI: 10.1117/1.jbo.25.7.077001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 06/11/2020] [Indexed: 06/11/2023]
Abstract
SIGNIFICANCE Alzheimer's disease (AD) is an irreversible and progressive disorder that damages brain cells and impairs the cognitive abilities of the affected. Developing a sensitive and cost-effective method to detect Alzheimer's biomarkers appears vital in both a diagnostic and therapeutic perspective. AIM Our goal is to develop a sensitive and reliable tool for detection of amyloid β (1-42) peptide (Aβ42), a major AD biomarker, using fiber-enhanced Raman spectroscopy (FERS). APPROACH A hollow core photonic crystal fiber (HCPCF) was integrated with a conventional Raman spectroscopic setup to perform FERS measurements. FERS was then coupled with surface-enhanced Raman spectroscopy (SERS) to further amplify the Raman signal thanks to a combined FERS-SERS assay. RESULTS A minimum 20-fold enhancement of the Raman signal of Aβ42 as compared to a conventional Raman spectroscopy scheme was observed using the HCPCF-based light delivery system. The signal was further boosted by decorating the fiber core with gold bipyramids generating an additional SERS effect, resulting in an overall 200 times amplification. CONCLUSIONS The results demonstrate that the use of an HCPCF-based platform can provide sharp and intense Raman signals of Aβ42, in turn paving the way toward the development of a sensitive label-free detection tool for early diagnosis of AD.
Collapse
Affiliation(s)
- Pinkie J. Eravuchira
- Tel Aviv University, Department of Biomedical Engineering, Faculty of Engineering, Tel Aviv, Israel
| | - Martina Banchelli
- Institute of Applied Physics “NelloCarrara,” National Research Council, Sesto Fiorentino, Italy
| | - Cristiano D’Andrea
- Institute of Applied Physics “NelloCarrara,” National Research Council, Sesto Fiorentino, Italy
| | - Marella de Angelis
- Institute of Applied Physics “NelloCarrara,” National Research Council, Sesto Fiorentino, Italy
| | - Paolo Matteini
- Institute of Applied Physics “NelloCarrara,” National Research Council, Sesto Fiorentino, Italy
| | - Israel Gannot
- Tel Aviv University, Department of Biomedical Engineering, Faculty of Engineering, Tel Aviv, Israel
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
| |
Collapse
|
14
|
Della Ventura B, Banchelli M, Funari R, Illiano A, De Angelis M, Taroni P, Amoresano A, Matteini P, Velotta R. Biosensor surface functionalization by a simple photochemical immobilization of antibodies: experimental characterization by mass spectrometry and surface enhanced Raman spectroscopy. Analyst 2020; 144:6871-6880. [PMID: 31686068 DOI: 10.1039/c9an00443b] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Surface functionalization is a key step in biosensing since it is the basis of an effective analyte recognition. Among all the bioreceptors, antibodies (Abs) play a key role thanks to their superior specificity, although the available immobilization strategies suffer from several drawbacks. When gold is the interacting surface, the recently introduced Photochemical Immobilization Technique (PIT) has been shown to be a quick, easy-to-use and very effective method to tether Abs oriented upright by means of thiols produced via tryptophan mediated disulphide bridge reduction. Although the molecular mechanism of this process is quite well identified, the detailed morphology of the immobilized antibodies is still elusive due to inherent difficulties related to the microscopy imaging of Abs. The combination of Mass Spectrometry, Surface-Enhanced Raman Spectroscopy and Ellman's assay demonstrates that Abs irradiated under the conditions in which PIT is realized show only two effective disulphide bridges available for binding. They are located in the constant region of the immunoglobulin light chain so that the most likely position Ab assumes is side-on, i.e. with one Fab (i.e. the antigen binding portion of the antibody) exposed to the solution. This is not a limitation of the recognition efficiency in view of the intrinsic flexibility of the Ab structure, which makes the free Fab able to sway in the solution, a feature of great importance in many biosensing applications.
Collapse
Affiliation(s)
- Bartolomeo Della Ventura
- Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 - Milano, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Banchelli M, Cascella R, D'Andrea C, Cabaj L, Osticioli I, Ciofini D, Li MS, Skupień K, de Angelis M, Siano S, Cecchi C, Pini R, La Penna G, Chiti F, Matteini P. Nanoscopic insights into the surface conformation of neurotoxic amyloid β oligomers. RSC Adv 2020; 10:21907-21913. [PMID: 35516647 PMCID: PMC9054531 DOI: 10.1039/d0ra03799k] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 06/01/2020] [Indexed: 11/21/2022] Open
Abstract
Raman spectroscopy assisted by localized plasmon resonances generating effective hot spots at the gaps between intertwined silver nanowires is herein adopted to unravel characteristic molecular motifs on the surface of Aβ42 misfolded oligomers that are critical in driving intermolecular interactions in neurodegeneration. Unraveling characteristic structural determinants at the basis of Aβ42 oligomers' neurotoxicity by a sub-molecular SERS investigation of their surface.![]()
Collapse
|
16
|
Vanni M, Serrano-Ruiz M, Telesio F, Heun S, Banchelli M, Matteini P, Mio AM, Nicotra G, Spinella C, Caporali S, Giaccherini A, D’Acapito F, Caporali M, Peruzzini M. Black Phosphorus/Palladium Nanohybrid: Unraveling the Nature of P-Pd Interaction and Application in Selective Hydrogenation. Chem Mater 2019; 31:5075-5080. [PMID: 31656368 PMCID: PMC6804426 DOI: 10.1021/acs.chemmater.9b00851] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 06/21/2019] [Indexed: 05/31/2023]
Abstract
The burgeoning interest in two-dimensional (2D) black phosphorus (bP) contributes to the expansion of its applications in numerous fields. In the present study, 2D bP is used as a support for homogeneously dispersed palladium nanoparticles directly grown on it by a wet chemical process. Electron energy loss spectroscopy-scanning transmission electron microscopy analysis evidences a strong interaction between palladium and P atoms of the bP nanosheets. A quantitative evaluation of this interaction comes from the X-ray absorption spectroscopy measurements that show a very short Pd-P distance of 2.26 Å, proving for the first time the existence of an unprecedented Pd-P coordination bond of a covalent nature. Additionally, the average Pd-P coordination number of about 1.7 reveals that bP acts as a polydentate phosphine ligand toward the surface of the Pd atoms of the nanoparticles, thus preventing their agglomeration and inferring with structural stability. These unique properties result in a superior performance in the catalytic hydrogenation of chloronitroarenes to chloroanilines, where a higher chemoselectivity in comparison to other heterogeneous catalyst based on palladium has been observed.
Collapse
Affiliation(s)
- Matteo Vanni
- CNR-ICCOM, Via Madonna del Piano10, 50019 Sesto Fiorentino, Italy
- Department
of Biotechnology, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy
| | | | - Francesca Telesio
- NEST
Istituto Nanoscienze—CNR and Scuola Normale Superiore, Piazza S. Silvestro 12, 56127 Pisa, Italy
| | - Stefan Heun
- NEST
Istituto Nanoscienze—CNR and Scuola Normale Superiore, Piazza S. Silvestro 12, 56127 Pisa, Italy
| | | | - Paolo Matteini
- CNR-IFAC, Via Madonna del Piano10, 50019 Sesto Fiorentino, Italy
| | | | - Giuseppe Nicotra
- CNR-IMM
Istituto per la Microelettronica e Microsistemi, VIII strada 5, I-95121 Catania, Italy
| | - Corrado Spinella
- CNR-IMM
Istituto per la Microelettronica e Microsistemi, VIII strada 5, I-95121 Catania, Italy
| | - Stefano Caporali
- Department
of Industrial Engineering, University of
Florence, Via di S. Marta
3, 50139 Florence, 50139, Italy
| | - Andrea Giaccherini
- Department
of Earth Sciences, University of Florence, Via La Pira 4, 50121 Firenze, Italy
| | - Francesco D’Acapito
- CNR-IOM-OGG,
c/o European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, Cedex 9 France
| | - Maria Caporali
- CNR-ICCOM, Via Madonna del Piano10, 50019 Sesto Fiorentino, Italy
| | | |
Collapse
|
17
|
Candelise N, Schmitz M, Llorens F, Villar-Piqué A, Cramm M, Thom T, da Silva Correia SM, da Cunha JEG, Möbius W, Outeiro TF, Álvarez VG, Banchelli M, D'Andrea C, de Angelis M, Zafar S, Rabano A, Matteini P, Zerr I. Seeding variability of different alpha synuclein strains in synucleinopathies. Ann Neurol 2019; 85:691-703. [PMID: 30805957 DOI: 10.1002/ana.25446] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 02/19/2019] [Accepted: 02/19/2019] [Indexed: 12/30/2022]
Abstract
OBJECTIVES Currently, the exact reasons why different α-synucleinopathies exhibit variable pathologies and phenotypes are still unknown. A potential explanation may be the existence of distinctive α-synuclein conformers or strains. Here, we intend to analyze the seeding activity of dementia with Lewy bodies (DLB) and Parkinson's disease (PD) brain-derived α-synuclein seeds by real-time quaking-induced conversion (RT-QuIC) and to investigate the structure and morphology of the α-synuclein aggregates generated by RT-QuIC. METHODS A misfolded α-synuclein-enriched brain fraction from frontal cortex and substantia nigra pars compacta tissue, isolated by several filtration and centrifugation steps, was subjected to α-synuclein/RT-QuIC analysis. Our study included neuropathologically well-characterized cases with DLB, PD, and controls (Ctrl). Biochemical and morphological analyses of RT-QuIC products were conducted by western blot, dot blot analysis, Raman spectroscopy, atomic force microscopy, and transmission electron microscopy. RESULTS Independently from the brain region, we observed different seeding kinetics of α-synuclein in the RT-QuIC in patients with DLB compared to PD and Ctrl. Biochemical characterization of the RT-QuIC product indicated the generation of a proteinase K-resistant and fibrillary α-synuclein species in DLB-seeded reactions, whereas PD and control seeds failed in the conversion of wild-type α-synuclein substrate. INTERPRETATION Structural variances of α-synuclein seeding kinetics and products in DLB and PD indicated, for the first time, the existence of different α-synuclein strains in these groups. Therefore, our study contributes to a better understanding of the clinical heterogeneity among α-synucleinopathies, offers an opportunity for a specific diagnosis, and opens new avenues for the future development of strain-specific therapies. Ann Neurol 2019;85:691-703.
Collapse
Affiliation(s)
- Niccolò Candelise
- Department of Neurology, University Medicine Goettingen and the German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - Matthias Schmitz
- Department of Neurology, University Medicine Goettingen and the German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - Franc Llorens
- CIBERNED (Network Center for Biomedical Research of Neurodegenerative Diseases), Institute Carlos III, Ministry of Health, Barcelona, Spain and IDIBELL (Bellvitge Biomedical Research Institute), L'Hospitale de Llobregat, Spain
| | - Anna Villar-Piqué
- Department of Neurology, University Medicine Goettingen and the German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - Maria Cramm
- Department of Neurology, University Medicine Goettingen and the German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - Tobias Thom
- Department of Neurology, University Medicine Goettingen and the German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - Susana Margarida da Silva Correia
- Department of Neurology, University Medicine Goettingen and the German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | | | - Wiebke Möbius
- Center for Nanoscale Microscopy and Molecular Physiology of the Brain, Goettingen, Germany.,Max Planck Institute for Experimental Medicine Medicine Department of Neurogenetics, Göttingen, Germany
| | - Tiago F Outeiro
- Department of Experimental Neurodegeneration, Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany.,Max Planck Institute for Experimental Medicine Medicine Department of Neurogenetics, Göttingen, Germany.,Institute of Neuroscience, The Medical School, Newcastle University, Newcastle Upon Tyne, United Kingdom
| | - Valentina González Álvarez
- Departamento de Neuropatología y Banco de Tejidos (BT-CIEN), Fundación CIEN, Instituto de Salud Carlos III Centro Alzheimer Fundación Reina Sofíac, Madrid, Spain
| | - Martina Banchelli
- Institute of Applied Physics (IFAC), National Research Council (CNR), Sesto Fiorentino, Italy
| | - Cristiano D'Andrea
- Institute of Applied Physics (IFAC), National Research Council (CNR), Sesto Fiorentino, Italy
| | - Marella de Angelis
- Institute of Applied Physics (IFAC), National Research Council (CNR), Sesto Fiorentino, Italy
| | - Saima Zafar
- Department of Neurology, University Medicine Goettingen and the German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - Alberto Rabano
- Departamento de Neuropatología y Banco de Tejidos (BT-CIEN), Fundación CIEN, Instituto de Salud Carlos III Centro Alzheimer Fundación Reina Sofíac, Madrid, Spain
| | - Paolo Matteini
- Institute of Applied Physics (IFAC), National Research Council (CNR), Sesto Fiorentino, Italy
| | - Inga Zerr
- Department of Neurology, University Medicine Goettingen and the German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| |
Collapse
|
18
|
D'Andrea C, Foti A, Cottat M, Banchelli M, Capitini C, Barreca F, Canale C, de Angelis M, Relini A, Maragò OM, Pini R, Chiti F, Gucciardi PG, Matteini P. Nanoscale Discrimination between Toxic and Nontoxic Protein Misfolded Oligomers with Tip-Enhanced Raman Spectroscopy. Small 2018; 14:e1800890. [PMID: 30091859 DOI: 10.1002/smll.201800890] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 07/20/2018] [Indexed: 05/12/2023]
Abstract
Highly toxic protein misfolded oligomers associated with neurological disorders such as Alzheimer's and Parkinson's diseases are nowadays considered primarily responsible for promoting synaptic failure and neuronal death. Unraveling the relationship between structure and neurotoxicity of protein oligomers appears pivotal in understanding the causes of the pathological process, as well as in designing novel diagnostic and therapeutic strategies tuned toward the earliest and presymptomatic stages of the disease. Here, it is benefited from tip-enhanced Raman spectroscopy (TERS) as a surface-sensitive tool with spatial resolution on the nanoscale, to inspect the spatial organization and surface character of individual protein oligomers from two samples formed by the same polypeptide sequence and different toxicity levels. TERS provides direct assignment of specific amino acid residues that are exposed to a large extent on the surface of toxic species and buried in nontoxic oligomers. These residues, thanks to their outward disposition, might represent structural factors driving the pathogenic behavior exhibited by protein misfolded oligomers, including affecting cell membrane integrity and specific signaling pathways in neurodegenerative conditions.
Collapse
Affiliation(s)
- Cristiano D'Andrea
- IFAC-CNR, Institute of Applied Physics "Nello Carrara,", National Research Council, Via Madonna del Piano 10, I-50019, Sesto Fiorentino, Italy
| | - Antonino Foti
- IPCF-CNR, Institute for Chemical and Physical Processes, National Research Council, Viale F. Stagno D'Alcontres 37, I-98158, Messina, Italy
| | - Maximilien Cottat
- IFAC-CNR, Institute of Applied Physics "Nello Carrara,", National Research Council, Via Madonna del Piano 10, I-50019, Sesto Fiorentino, Italy
| | - Martina Banchelli
- IFAC-CNR, Institute of Applied Physics "Nello Carrara,", National Research Council, Via Madonna del Piano 10, I-50019, Sesto Fiorentino, Italy
| | - Claudia Capitini
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale Morgagni 50, I-50134, Firenze, Italy
| | - Francesco Barreca
- Department of MIFT, University of Messina, Viale F. Stagno d'Alcontres 31, I-98166, Messina, Italy
| | - Claudio Canale
- Department of Physics, University of Genoa, Via Dodecaneso 33, I-16146, Genova, Italy
| | - Marella de Angelis
- IFAC-CNR, Institute of Applied Physics "Nello Carrara,", National Research Council, Via Madonna del Piano 10, I-50019, Sesto Fiorentino, Italy
| | - Annalisa Relini
- Department of Chemistry and Industrial Chemistry, University of Genoa, Via Dodecaneso 31, I-16146, Genova, Italy
| | - Onofrio M Maragò
- IPCF-CNR, Institute for Chemical and Physical Processes, National Research Council, Viale F. Stagno D'Alcontres 37, I-98158, Messina, Italy
| | - Roberto Pini
- IFAC-CNR, Institute of Applied Physics "Nello Carrara,", National Research Council, Via Madonna del Piano 10, I-50019, Sesto Fiorentino, Italy
| | - Fabrizio Chiti
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale Morgagni 50, I-50134, Firenze, Italy
| | - Pietro G Gucciardi
- IPCF-CNR, Institute for Chemical and Physical Processes, National Research Council, Viale F. Stagno D'Alcontres 37, I-98158, Messina, Italy
| | - Paolo Matteini
- IFAC-CNR, Institute of Applied Physics "Nello Carrara,", National Research Council, Via Madonna del Piano 10, I-50019, Sesto Fiorentino, Italy
| |
Collapse
|
19
|
Banchelli M, de Angelis M, D'Andrea C, Pini R, Matteini P. Triggering molecular assembly at the mesoscale for advanced Raman detection of proteins in liquid. Sci Rep 2018; 8:1033. [PMID: 29348509 PMCID: PMC5773671 DOI: 10.1038/s41598-018-19558-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 12/21/2017] [Indexed: 01/14/2023] Open
Abstract
An advanced optofluidic system for protein detection based on Raman signal amplification via dewetting and molecular gathering within temporary mesoscale assemblies is presented. The evaporation of a microliter volume of protein solution deposited in a circular microwell precisely follows an outward-receding geometry. Herein the combination of liquid withdrawal with intermolecular interactions induces the formation of self-assembled molecular domains at the solid-liquid interface. Through proper control of the evaporation rate, amplitude of the assemblies and time for spectral collection at the liquid edge are extensively raised, resulting in a local enhancement and refinement of the Raman response, respectively. Further signal amplification is obtained by taking advantage of the intense local electromagnetic fields generated upon adding a plasmonic coating to the microwell. Major advantages of this optofluidic method lie in the obtainment of high-quality, high-sensitivity Raman spectra with detection limit down to sub-micromolar values. Peculiarly, the assembled proteins in the liquid edge region maintain their native-like state without displaying spectral changes usually occurring when dried drop deposits are considered.
Collapse
Affiliation(s)
- Martina Banchelli
- Institute of Applied Physics 'Nello Carrara', National Research Council (IFAC-CNR), via Madonna del Piano 10, Sesto Fiorentino, Italy
| | - Marella de Angelis
- Institute of Applied Physics 'Nello Carrara', National Research Council (IFAC-CNR), via Madonna del Piano 10, Sesto Fiorentino, Italy
| | - Cristiano D'Andrea
- Institute of Applied Physics 'Nello Carrara', National Research Council (IFAC-CNR), via Madonna del Piano 10, Sesto Fiorentino, Italy
| | - Roberto Pini
- Institute of Applied Physics 'Nello Carrara', National Research Council (IFAC-CNR), via Madonna del Piano 10, Sesto Fiorentino, Italy
| | - Paolo Matteini
- Institute of Applied Physics 'Nello Carrara', National Research Council (IFAC-CNR), via Madonna del Piano 10, Sesto Fiorentino, Italy.
| |
Collapse
|
20
|
Banchelli M, Tiribilli B, de Angelis M, Pini R, Caminati G, Matteini P. Controlled Veiling of Silver Nanocubes with Graphene Oxide for Improved Surface-Enhanced Raman Scattering Detection. ACS Appl Mater Interfaces 2016; 8:2628-34. [PMID: 26751095 DOI: 10.1021/acsami.5b10438] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Hybrid graphene oxide (GO)/metal nanocomposites have been recently proposed as novel surface-enhanced Raman scattering (SERS) substrates. Despite an increasing interest in these systems, standardization in their fabrication process is still lacking but urgently required to support their use for real-life applications. In this work we investigate how the assembly of GO should be conducted to control adsorption geometry and optical properties at the interface with plasmonic nanostructures as monolayer assemblies of silver nanocubes, by tuning main experimental parameters including GO concentration and self-assembly time. We finally identified the experimental conditions for building up a close-fitting soft dressing of the plasmonic surface, which shows optimal characteristics for flexible and reliable SERS detection.
Collapse
Affiliation(s)
- Martina Banchelli
- Institute of Applied Physics , National Research Council, via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
| | - Bruno Tiribilli
- Institute for Complex Systems, National Research Council , via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
| | - Marella de Angelis
- Institute of Applied Physics , National Research Council, via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
| | - Roberto Pini
- Institute of Applied Physics , National Research Council, via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
| | - Gabriella Caminati
- Department of Chemistry "Hugo Schiff" and CSGI, University of Florence , via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Italy
| | - Paolo Matteini
- Institute of Applied Physics , National Research Council, via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
| |
Collapse
|
21
|
Banchelli M, Tiribilli B, Pini R, Dei L, Matteini P, Caminati G. Controlled graphene oxide assembly on silver nanocube monolayers for SERS detection: dependence on nanocube packing procedure. Beilstein J Nanotechnol 2016; 7:9-21. [PMID: 26925348 PMCID: PMC4734306 DOI: 10.3762/bjnano.7.2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 12/21/2015] [Indexed: 05/03/2023]
Abstract
Hybrid graphene oxide/silver nanocubes (GO/AgNCs) arrays for surface-enhanced Raman spectroscopy (SERS) applications were prepared by means of two procedures differing for the method used in the assembly of the silver nanocubes onto the surface: Langmuir-Blodgett (LB) transfer and direct sequential physisorption of silver nanocubes (AgNCs). Adsorption of graphene oxide (GO) flakes on the AgNC assemblies obtained with both procedures was monitored by quartz crystal microbalance (QCM) technique as a function of GO bulk concentration. The experiment provided values of the adsorbed GO mass on the AgNC array and the GO saturation limit as well as the thickness and the viscoelastic properties of the GO film. Atomic force microscopy (AFM) measurements of the resulting samples revealed that a similar surface coverage was achieved with both procedures but with a different distribution of silver nanoparticles. In the GO covered LB film, the AgNC distribution is characterized by densely packed regions alternating with empty surface areas. On the other hand, AgNCs are more homogeneously dispersed over the entire sensor surface when the nanocubes spontaneously adsorb from solution. In this case, the assembly results in less-packed silver nanostructures with higher inter-cube distance. For the two assembled substrates, AFM of silver nanocubes layers fully covered with GO revealed the presence of a homogeneous, flexible and smooth GO sheet folding over the silver nanocubes and extending onto the bare surface. Preliminary SERS experiments on adenine showed a higher SERS enhancement factor for GO on Langmuir-Blodgett films of AgNCs with respect to bare AgNC systems. Conversely, poor SERS enhancement for adenine resulted for GO-covered AgNCs obtained by spontaneous adsorption. This indicated that the assembly and packing of AgNCs obtained in this way, although more homogeneous over the substrate surface, is not as effective for SERS analysis.
Collapse
Affiliation(s)
- Martina Banchelli
- Institute of Applied Physics, National Research Council - Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
| | - Bruno Tiribilli
- Institute for Complex Systems, National Research Council, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
| | - Roberto Pini
- Institute of Applied Physics, National Research Council - Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
| | - Luigi Dei
- Department of Chemistry and CSGI, University of Florence, Via della Lastruccia 3–13, I-50019 Sesto Fiorentino, Italy
| | - Paolo Matteini
- Institute of Applied Physics, National Research Council - Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
| | - Gabriella Caminati
- Department of Chemistry and CSGI, University of Florence, Via della Lastruccia 3–13, I-50019 Sesto Fiorentino, Italy
| |
Collapse
|
22
|
Martin RC, Locatelli E, Li Y, Matteini P, Monaco I, Cui G, Li S, Banchelli M, Pini R, Comes Franchini M. One-pot synthesis of magnesium nanoparticles embedded in a chitosan microparticle matrix: a highly biocompatible tool for in vivo cancer treatment. J Mater Chem B 2016; 4:207-211. [DOI: 10.1039/c5tb02499d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A biocompatible nanosystem made up of a chitosan and filled with Mg NPs was synthesized and tested as tool for photothermal therapy. Proof of concept on hcc-bearing mice is presented.
Collapse
Affiliation(s)
- Robert. C. Martin
- Division of Surgical Oncology
- Department of Surgery
- University of Louisville
- Louisville
- USA
| | - Erica Locatelli
- Department of Industrial Chemistry “Toso MOntanari”
- University of Bologna
- Bologna
- Italy
| | - Yan Li
- Division of Surgical Oncology
- Department of Surgery
- University of Louisville
- Louisville
- USA
| | - Paolo Matteini
- Institute of Applied Physics “Nello Carrara”
- National Research Council of Italy
- I-50019 Sesto Fiorentino
- Italy
| | - Ilaria Monaco
- Department of Industrial Chemistry “Toso MOntanari”
- University of Bologna
- Bologna
- Italy
| | - Guozhen Cui
- Division of Surgical Oncology
- Department of Surgery
- University of Louisville
- Louisville
- USA
| | - Suping Li
- Division of Surgical Oncology
- Department of Surgery
- University of Louisville
- Louisville
- USA
| | - Martina Banchelli
- Institute of Applied Physics “Nello Carrara”
- National Research Council of Italy
- I-50019 Sesto Fiorentino
- Italy
| | - Roberto Pini
- Institute of Applied Physics “Nello Carrara”
- National Research Council of Italy
- I-50019 Sesto Fiorentino
- Italy
| | - Mauro Comes Franchini
- Department of Industrial Chemistry “Toso MOntanari”
- University of Bologna
- Bologna
- Italy
| |
Collapse
|
23
|
Banchelli M, Guardiani C, Sandberg RB, Menichetti S, Procacci P, Caminati G. Media effects in modulating the conformational equilibrium of a model compound for tumor necrosis factor converting enzyme inhibition. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.02.066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
24
|
Sandberg RB, Banchelli M, Guardiani C, Menichetti S, Caminati G, Procacci P. Efficient Nonequilibrium Method for Binding Free Energy Calculations in Molecular Dynamics Simulations. J Chem Theory Comput 2015; 11:423-35. [DOI: 10.1021/ct500964e] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Robert B. Sandberg
- Department
of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | | | - Carlo Guardiani
- Department
of Physics, University of Cagliari, 09124 Cagliari, Italy
- IOM Institute, CNR, 09042 Cagliari, Italy
| | | | | | | |
Collapse
|
25
|
Banchelli M, Nappini S, Montis C, Bonini M, Canton P, Berti D, Baglioni P. Magnetic nanoparticle clusters as actuators of ssDNA release. Phys Chem Chem Phys 2014; 16:10023-31. [PMID: 24487734 DOI: 10.1039/c3cp55470h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
One of the major areas of research in nanomedicine is the design of drug delivery systems with remotely controllable release of the drug. Despite the enormous progress in the field, this aspect still poses a challenge, especially in terms of selectivity and possible harmful interactions with biological components other than the target. We report an innovative approach for the controlled release of DNA, based on clusters of core-shell magnetic nanoparticles. The primary nanoparticles are functionalized with a single-stranded oligonucleotide, whose pairing with a half-complementary strand in solution induces clusterization. The application of a low frequency (6 KHz) alternating magnetic field induces DNA melting with the release of the single strand that induces clusterization. The possibility of steering and localizing the magnetic nanoparticles, and magnetically actuating the DNA release discloses new perspectives in the field of nucleic-acid based therapy.
Collapse
Affiliation(s)
- M Banchelli
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, 50019 Florence, Italy.
| | | | | | | | | | | | | |
Collapse
|
26
|
Banchelli M, Guardiani C, Tenori E, Menichetti S, Caminati G, Procacci P. Chemical–physical analysis of a tartrate model compound for TACE inhibition. Phys Chem Chem Phys 2013; 15:18881-93. [DOI: 10.1039/c3cp52955j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
27
|
Gambinossi F, Banchelli M, Durand A, Berti D, Brown T, Caminati G, Baglioni P. Modulation of density and orientation of amphiphilic DNA anchored to phospholipid membranes. I. Supported lipid bilayers. J Phys Chem B 2010; 114:7338-47. [PMID: 20446700 DOI: 10.1021/jp100730x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In the present series of papers, we describe the results of a systematic study on the anchoring of cholesterol-tagged oligonucleotides to phospholipids bilayers followed by membrane-assisted hybridization of the complementary strand in solution. This paper describes the anchoring of novel cholesterol-modified DNA-18mers in supported lipid bilayers (SLB) of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine: we compared the behavior of two anchoring functionalities differing in the number of cholesterol units and in the length of a spacer group. Quartz Crystal Microbalance with impedance monitoring (QCM-Z) measurements showed that both oligonucleotides insert into the bilayer membrane through cholesterol anchoring; however, dramatic differences, in terms of surface organization and thickness, are found as the number of anchoring units increases. In the case of multiple cholesterol units, a peculiar three-regimes concentration dependence was revealed and correlated to the effective size of the adsorbing units. Interestingly, for high oligonucleotide concentration, the adsorption process was rationalized in terms of a compaction model of amphiphilic DNA molecules. QCM-Z temperature cycles of the SLB-anchored double strands provided clear evidence for reversible hybridization at the bilayer interface.
Collapse
Affiliation(s)
- Filippo Gambinossi
- Department of Chemistry and CSGI, University of Florence, via della Lastruccia 3-Sesto Fiorentino, 50019 Florence, Italy
| | | | | | | | | | | | | |
Collapse
|
28
|
Banchelli M, Gambinossi F, Durand A, Caminati G, Brown T, Berti D, Baglioni P. Modulation of density and orientation of amphiphilic DNA on phospholipid membranes. II. Vesicles. J Phys Chem B 2010; 114:7348-58. [PMID: 20446699 DOI: 10.1021/jp100731c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In the present series of papers, we describe the results of a systematic study on the anchoring of cholesterol-tagged oligonucleotides to phospholipid bilayers followed by membrane-assisted hybridization of the complementary strand in solution. This paper compares the behavior of two cholesteryl modified oligonucleotides, differing in the architecture and hydrophobicity of the lipophilic moiety, in the self-aggregation, hybridization, and insertion in phospholipid vesicle membranes. We have focused our attention on a singly substituted derivative (SC-ON(1)) and a multicholesterol (MC-ON(1)) derivative, where the cholesteryl units are inserted at the desired positions along a noncoupling T-sequence. The self-aggregation properties in solution are also explicitly taken into account and evaluated as competitive with respect to the adsorption at fluid or solid interfaces and to hybridization with the complementary ON(2) sequence. By exploring a wide range of ON derivative concentrations, different peculiar scenarios emerge for different hydrophobicity of the amphiphilic DNA guest molecules on the vesicles, in terms of distribution and conformation of the single strand and consequent coupling properties with the complementary strand in solution.
Collapse
Affiliation(s)
- Martina Banchelli
- Department of Chemistry and CSGI, University of Florence, via della Lastruccia 3-Sesto Fiorentino, 50019 Florence, Italy
| | | | | | | | | | | | | |
Collapse
|
29
|
Banchelli M, Bombelli FB, Berti D, Baglioni P. Chapter 13 - Soft hybrid nanostructures composed of phospholipid liposomes decorated with oligonucleotides. Methods Enzymol 2010; 464:249-77. [PMID: 19903559 DOI: 10.1016/s0076-6879(09)64013-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/23/2023]
Abstract
This chapter reports on the design, preparation, and characterization of liposomes decorated with synthetic lipid-oligonucleotide conjugates. Several key parameters should be considered for a successful preparation of these functional nanostructures that can be employed further as building blocks in DNA-directed assembly of nano-objects. These parameters are reviewed explicitly in this report and their contributions are discussed.
Collapse
Affiliation(s)
- Martina Banchelli
- Department of Chemistry and CSGI, University of Florence, Sesto Fiorentino, Florence, Italy
| | | | | | | |
Collapse
|
30
|
Banchelli M, Betti F, Berti D, Caminati G, Bombelli FB, Brown T, Wilhelmsson LM, Nordén B, Baglioni P. Phospholipid membranes decorated by cholesterol-based oligonucleotides as soft hybrid nanostructures. J Phys Chem B 2008; 112:10942-52. [PMID: 18693696 DOI: 10.1021/jp802415t] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
DNA monomers and oligomers are currently showing great promise as building blocks for supramolecular arrays that can self-assemble in a fashion preprogrammed by the base pairing code. The design and build-up of hybrid DNA/amphiphilic self-assemblies can expand the range of possible architectures and enhance the selectivity toward a well-specified geometry. We report on the self-assembly properties in aqueous solution of a cholesteryl-tetraethylenglycol single stranded 18-mer oligonucleotide (ON 1TEG-Chol) and on its spontaneous insertion in fluid phospholipid membranes. Up to 500 units of these lipophilic ss-oligonucleotides can be incorporated in the outer leaflet of 350 A radius POPC vesicle. The insertion and hybridization with the complementary oligonucleotide are monitored through light scattering as an increase of hydrodynamic thickness, which is interpreted in terms of average distance between anchoring sites. The conformation of the ss-oligonucleotidic portion is strongly dependent on surface coverage, passing from a quasi-random coil to a more rigid configuration, as concentration increases. Interestingly, conformational details affect in a straightforward fashion the hybridization kinetics. Liposomes with single- and double-strand decorations remain stable within the experimental time window (about one week). The structure represents an example of successful and stable amphiphile/DNA supramolecular hybrid, where a DNA guest is held in a membrane by hydrophobic interactions. The lipophilic oligonucleotide under investigation is therefore a suitable building block that can effectively serve as a hydrophobic anchor in the fluid bilayer to assemble supramolecular constructs based on the DNA digital code.
Collapse
Affiliation(s)
- Martina Banchelli
- Department of Chemistry and CSGI, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Affiliation(s)
- Martina Banchelli
- Dipartimento di Chimica, Università di Firenze e CSGI via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | | | | |
Collapse
|
32
|
Banchelli M, Berti D, Baglioni P. Molecular Recognition Drives Oligonucleotide Binding to Nucleolipid Self-Assemblies. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604826] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|