1
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Posada VM, Marin A, Mesa-Restrepo A, Nashed J, Allain JP. Enhancing silk fibroin structures and applications through angle-dependent Ar + plasma treatment. Int J Biol Macromol 2024; 257:128352. [PMID: 38043660 DOI: 10.1016/j.ijbiomac.2023.128352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 10/26/2023] [Accepted: 11/20/2023] [Indexed: 12/05/2023]
Abstract
This study tackles limitations of Silk Fibroin (SF), including availability of sites for modification. This is achieved by Direct Plasma Nanosynthesis (DPNS), an Ar+ bombardment method, to generate and modify nanostructures and nanoscale properties on the SF surface. SF samples were treated with DPNS at incidence angles of 45o and 60o, with specific ion dose and energy parameters (1 × 1018 ions/cm2 and 500 eV, respectively) maintained throughout the process. Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) primarily underscored transformations in SF's nitrogenous components. Specifically, treatment produced a boost in C-NH2, particularly pronounced in the 45o-treated samples, suggesting changes were more superficial than alterations to the secondary structure. The DPNS treatment gave rise to periodic nanocone structures on the SF surface, with a scale increase correlated to a higher angle of incidence. This resulted in a decrease in surface stiffness and significant changes in the motility of J774 macrophages interacting with the transformed SF. Furthermore, the SF samples treated at a 60o incidence showcased a confinement effect, moderating the macrophages' motility, morphology, and inflammatory response. The DPNS-induced alterations not only mitigate SF's limitations but also affect cellular behavior, expanding potential for SF in biomaterials.
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Affiliation(s)
- Viviana M Posada
- Ken and Mary Alice Lindquist Department of Nuclear Engineering, Pennsylvania State University, USA.
| | - Alexandru Marin
- Ken and Mary Alice Lindquist Department of Nuclear Engineering, Pennsylvania State University, USA; Surface Analysis Laboratory, Institute for Nuclear Research Pitesti, Mioveni 115400, Romania
| | | | - Jordan Nashed
- Ken and Mary Alice Lindquist Department of Nuclear Engineering, Pennsylvania State University, USA
| | - Jean Paul Allain
- Ken and Mary Alice Lindquist Department of Nuclear Engineering, Pennsylvania State University, USA; Department of Biomedical Engineering, Pennsylvania State University, USA; Lloyd & Dorothy Foehr Huck Chair in Plasma Medicine, Pennsylvania State University, USA
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2
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Zhang Y, Wang G, Liu F, Shang Z, Li T, Yang Q, Zhai T, Wang X. Chirality detection of biological molecule through spin selectivity effect. J Chem Phys 2023; 159:114703. [PMID: 37721328 DOI: 10.1063/5.0156513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Accepted: 08/28/2023] [Indexed: 09/19/2023] Open
Abstract
The ability to accurately monitor chiral biological molecules is of great significance for their potential applications in disease diagnosis and virus detection. As the existing chiral detection technologies are mainly relying on an optical method by using left/right circularly polarized light, the universality is low and the operation is complicated. Moreover, large quantity of chiral molecules is required, causing low detection efficiency. Here, a self-assembled monolayer of polypeptides has been fabricated to realize trace detection of chirality based on spin selectivity of photon-electron interaction. We have utilized Kerr technique to detect the rotation angle by the molecular monolayer, which indicates the chirality of polypeptides. The chiral structure of a biological molecule could result in spin-selectivity of electrons and thus influence the interaction between electron spin and light polarization. A Kerr rotation angle of ∼3° has been obviously observed, equivalent to the magneto-optic Kerr effect without magnetic material or magnetic field. Furthermore, we have provided a novel solution to achieve chirality discrimination and amplification simultaneously through an optical fiber. The proposed design is applicable for chiral detection via increasing their differential output signal, which clearly demonstrates a useful strategy toward chirality characterization of biological molecules.
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Affiliation(s)
- Yu Zhang
- Department of Physics and Optoelectronic Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, China
| | - Guangcheng Wang
- Department of Physics and Optoelectronic Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, China
| | - Fangyuan Liu
- Department of Physics and Optoelectronic Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, China
| | - Zixuan Shang
- Department of Physics and Optoelectronic Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, China
| | - Tianhao Li
- Department of Physics and Optoelectronic Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, China
| | - Qianqian Yang
- Department of Physics and Optoelectronic Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, China
| | - Tianrui Zhai
- Department of Physics and Optoelectronic Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, China
| | - Xiaolei Wang
- Department of Physics and Optoelectronic Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, China
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3
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Rivas MV, Arenas Muñetón MJ, Bordoni AV, Lombardo MV, Spagnuolo CC, Wolosiuk A. Revisiting carboxylic group functionalization of silica sol-gel materials. J Mater Chem B 2023; 11:1628-1653. [PMID: 36752739 DOI: 10.1039/d2tb02279f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The carboxylic chemical group is a ubiquitous moiety present in amino acids, a ligand for transition metals, a colloidal stabilizer, and a weak acidic ion-exchanger in polymeric resins and given this property, it is attractive for responsive materials or nanopore-based gating applications. As the number of uses increases, subtle requirements are imposed on this molecular group when anchored to various platforms for the functioning of an integrated chemical system. In this context, silica stands as an inert and multipurpose platform that enables the anchoring of multiple chemical entities combined through several orthogonal synthesis methods on the interface. Surface chemical modification relies on the use of organoalkoxysilanes that must meet the demand of tuned chemical properties; this, in turn, urges for innovative approaches for having an improved, but simple, organic toolbox. Starting from commonly available molecular precursors, several approaches have emerged: hydrosilylation, click thiol-ene additions, the use of carbodiimides or the reaction between cyclic anhydrides and anchored amines. In this review, we analyze the importance of the COOH groups in the area of materials science and the commercial availability of COOH-based silanes and present new approaches for obtaining COOH-based organoalkoxide precursors. Undoubtedly, this will attract widespread interest for the ultimate design of highly integrated chemical platforms.
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Affiliation(s)
- M Verónica Rivas
- Gerencia Química - Instituto de Nanociencia y Nanotecnología, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, CONICET, Av. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires, Argentina. .,Departamento de Química Orgánica, Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina
| | - María J Arenas Muñetón
- Gerencia Química - Instituto de Nanociencia y Nanotecnología, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, CONICET, Av. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires, Argentina.
| | - Andrea V Bordoni
- Gerencia Química - Instituto de Nanociencia y Nanotecnología, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, CONICET, Av. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires, Argentina.
| | - M Verónica Lombardo
- Gerencia Química - Instituto de Nanociencia y Nanotecnología, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, CONICET, Av. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires, Argentina.
| | - Carla C Spagnuolo
- Departamento de Química Orgánica, Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina
| | - Alejandro Wolosiuk
- Gerencia Química - Instituto de Nanociencia y Nanotecnología, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, CONICET, Av. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires, Argentina.
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4
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Zhang R, Lin M, Wang C, Li Y, Li Y, Zou Q. Bioinspired fabrication of EDC-crosslinked gelatin/nanohydroxyapatite injectable microspheres for bone repair. INT J POLYM MATER PO 2022. [DOI: 10.1080/00914037.2022.2082423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Rui Zhang
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, China
| | - Mingyue Lin
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, China
| | - Chenxin Wang
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, China
| | - Yufan Li
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, China
| | - Yubao Li
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, China
| | - Qin Zou
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, China
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5
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Hinson CM, Bardo AM, Shannon CE, Rivera S, Swaminathan J, Marcotte EM, Anslyn EV. Studies of Surface Preparation for the Fluorosequencing of Peptides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14856-14865. [PMID: 34904833 PMCID: PMC8982273 DOI: 10.1021/acs.langmuir.1c02644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Silica passivating agents have shown great success in minimizing nonspecific protein binding to glass surfaces for imaging and microscopy applications. Amine-derivatized surfaces are commonly used in conjugation with amide coupling agents to immobilize peptides/proteins through C-terminal or side-chain carboxylic acids. In the case of the single-molecule fluorosequencing of peptides, attachment occurs via the C-terminus and nonspecific surface binding has previously been a source of error in peptide identification. Here, we employ fluorosequencing as a high-throughput, single-molecule sensitivity assay to identify and quantify the extent of nonspecific binding of peptides to amine-derivatized surfaces. We show that there is little improvement when using common passivating agents in combination with the surface derivatizing agent 3-aminopropyl-triethoxysilane (APTES) to couple the peptides to the modified surface. Furthermore, many xanthene fluorophores have carboxylic acids in the appended phenyl ring at positions ortho and meta or ortho and para, and the literature shows that conjugation through the ortho position is not favored. Because xanthene-derived fluorophores are commonly used for single-molecule applications, we devised a novel assay to probe the conjugation of peptides via their fluorophores relative to their C-termini on silane-derivatized surfaces. We find significant attachment to the ortho position, which is a warning to those attempting to immobilize fluorophore-labeled peptides to silica surfaces via amide coupling agents. However, eliminating all amines on the surface by switching to 3-azidopropyl-triethoxysilane (AzTES) for coupling via copper-catalyzed azide-alkyne cycloaddition (CuAAC) and omitting additional passivation agents allowed us to achieve a high level of C-terminally bound peptides relative to nonspecifically or ortho-phenyl-bound, fluorophore-labeled peptides. This strategy substantially improves the specificity of peptide immobilization for single-molecule fluorosequencing experiments.
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6
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Kori DKK, Jadhav RG, Dhruv L, Das AK. A platinum nanoparticle doped self-assembled peptide bolaamphiphile hydrogel as an efficient electrocatalyst for the hydrogen evolution reaction. NANOSCALE ADVANCES 2021; 3:6678-6688. [PMID: 36132646 PMCID: PMC9419667 DOI: 10.1039/d1na00439e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 09/11/2021] [Indexed: 06/16/2023]
Abstract
Noble metal-based nanomaterials have shown great potential for catalytic application with higher selectivity and activity. Owing to their self-assembly properties with various molecular interactions, peptides play an essential role in the controlled synthesis of noble metal-based catalysts with high surface area. In this work, a phenylalanine (F) and tyrosine (Y) based peptide bolaamphiphile is prepared by solution-phase peptide synthesis. The peptide bolaamphiphile readily self-assembles into a hydrogel with a cross-linked nanofibrillar network. The platinum nanoparticles (Pt NPs) are in situ generated within the cross-linked nanofibrillar network of the hydrogel matrix of the peptide bolaamphiphile. Benefiting from the synergistic properties of the Pt nanoparticles doped on three-dimensional fibrous networks, Pt6@hydrogel shows efficient catalytic activity for the electrochemical hydrogen evolution reaction (HER) in 0.5 M H2SO4 solution. The Pt6@hydrogel requires an overpotential of 45 mV at -10 mA cm-2 with a Tafel slope of 52 mV dec-1. The Pt6@hydrogel also shows electrocatalytic activity in basic and neutral pH solutions. The excellent activity and stability of Pt6@hydrogel for the HER shows great potential for energy conversion applications.
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Affiliation(s)
- Deepak K K Kori
- Department of Chemistry and Centre for Advanced Electronics (CAE), Indian Institute of Technology Indore Indore 453552 India
| | - Rohit G Jadhav
- Department of Chemistry and Centre for Advanced Electronics (CAE), Indian Institute of Technology Indore Indore 453552 India
| | - Likhi Dhruv
- Department of Chemistry and Centre for Advanced Electronics (CAE), Indian Institute of Technology Indore Indore 453552 India
| | - Apurba K Das
- Department of Chemistry and Centre for Advanced Electronics (CAE), Indian Institute of Technology Indore Indore 453552 India
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7
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Florek J, Larivière D, Kählig H, Fiorilli SL, Onida B, Fontaine FG, Kleitz F. Understanding Selectivity of Mesoporous Silica-Grafted Diglycolamide-Type Ligands in the Solid-Phase Extraction of Rare Earths. ACS APPLIED MATERIALS & INTERFACES 2020; 12:57003-57016. [PMID: 33300788 PMCID: PMC7760098 DOI: 10.1021/acsami.0c16282] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 11/17/2020] [Indexed: 05/26/2023]
Abstract
Rare earth elements (REEs) and their compounds are essential for rapidly developing modern technologies. These materials are especially critical in the area of green/sustainable energy; however, only very high-purity fractions are appropriate for these applications. Yet, achieving efficient REE separation and purification in an economically and environmentally effective way remains a challenge. Moreover, current extraction technologies often generate large amounts of undesirable wastes. In that perspective, the development of selective, reusable, and extremely efficient sorbents is needed. Among numerous ligands used in the liquid-liquid extraction (LLE) process, the diglycolamide-based (DGA) ligands play a leading role. Although these ligands display notable extraction performance in the liquid phase, their extractive chemistry is not widely studied when such ligands are tethered to a solid support. A detailed understanding of the relationship between chemical structure and function (i.e., extraction selectivity) at the molecular level is still missing although it is a key factor for the development of advanced sorbents with tailored selectivity. Herein, a series of functionalized mesoporous silica (KIT-6) solid phases were investigated as sorbents for the selective extraction of REEs. To better understand the extraction behavior of these sorbents, different spectroscopic techniques (solid-state NMR, X-ray photoelectron spectroscopy, XPS, and Fourier transform infrared spectroscopy, FT-IR) were implemented. The obtained spectroscopic results provide useful insights into the chemical environment and reactivity of the chelating ligand anchored on the KIT-6 support. Furthermore, it can be suggested that depending on the extracted metal and/or structure of the ligand and its attachment to KIT-6, different functional groups (i.e., C═O, N-H, or silanols) act as the main adsorption centers and preferentially capture targeted elements, which in turn may be associated with the different selectivity of the synthesized sorbents. Thus, by determining how metals interact with different supports, we aim to better understand the solid-phase extraction process of hybrid (organo)silica sorbents and design better extraction materials.
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Affiliation(s)
- Justyna Florek
- Department
of Inorganic Chemistry - Functional Materials, Faculty of Chemistry, University of Vienna, Währinger Straße 42, 1090 Vienna, Austria
| | - Dominic Larivière
- Department
of Chemistry, Université Laval, Québec, QC G1V 0A6, Canada
- Centre
en Catalyse et Chimie Verte (C3V) Université Laval, Québec, QC G1V 0A6, Canada
| | - Hanspeter Kählig
- Department
of Organic Chemistry, Faculty of Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Sonia L. Fiorilli
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico
di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
| | - Barbara Onida
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico
di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
| | - Frédéric-Georges Fontaine
- Department
of Chemistry, Université Laval, Québec, QC G1V 0A6, Canada
- Centre
en Catalyse et Chimie Verte (C3V) Université Laval, Québec, QC G1V 0A6, Canada
- Canada Research
Chair in Green Catalysis and Metal-Free Processes, Université Laval, Quebec, QC G1V 0A6, Canada
| | - Freddy Kleitz
- Department
of Inorganic Chemistry - Functional Materials, Faculty of Chemistry, University of Vienna, Währinger Straße 42, 1090 Vienna, Austria
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8
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Salama A, Hesemann P. Synthesis and characterization of N-guanidinium chitosan/silica ionic hybrids as templates for calcium phosphate mineralization. Int J Biol Macromol 2020; 147:276-283. [DOI: 10.1016/j.ijbiomac.2020.01.046] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 12/31/2019] [Accepted: 01/05/2020] [Indexed: 12/17/2022]
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9
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Ma J, Zhou B, Duan D, Pan K. Salinity-dependent nanostructures and composition of cell surface and its relation to Cd toxicity in an estuarine diatom. CHEMOSPHERE 2019; 215:807-814. [PMID: 30359950 DOI: 10.1016/j.chemosphere.2018.10.128] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 10/15/2018] [Accepted: 10/17/2018] [Indexed: 06/08/2023]
Abstract
The interactions between metal and phytoplankton are affected by salinity in estuarine environments. While water chemistry is an important factor regulating the metal bioavailability in phytoplankton, the physiological adaptation of the algae cells may also change their intrinsic response to metals. In this work, we tried to interpret the salinity-dependent Cd toxicity in a pennate diatom Nitzchia closterium from a biological side. As with many studies, we observed Cd toxicity to the diatom increased with decreasing salinity. However, changing free Cd ion concentrations may be partly responsible for the enhanced Cd toxicity. Multiple evidences showed that diatom cells acclimated at low salinity had stronger intrinsic Cd adsorption capacity. Salinity significantly affected not only the nanostructures but also the biochemical composition in the cell surface of the diatom. Diatom cells grown at lower salinity had a lower surface potential, higher specific surface area, and more sulfur-containing groups in the cell wall, leading to stronger Cd binding capacity in the cells. Meanwhile, more Si was present as poly-silicic acid when the salinity decreased. The change of Si content and speciation in the cell wall are also considered a major reason for the variations of Cd surface binding. Our study provided new clues for the salinity-dependent metal toxicity in marine diatoms.
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Affiliation(s)
- Jie Ma
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Beibei Zhou
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Dandan Duan
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Ke Pan
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China.
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10
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Limo MJ, Sola-Rabada A, Boix E, Thota V, Westcott ZC, Puddu V, Perry CC. Interactions between Metal Oxides and Biomolecules: from Fundamental Understanding to Applications. Chem Rev 2018; 118:11118-11193. [PMID: 30362737 DOI: 10.1021/acs.chemrev.7b00660] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Metallo-oxide (MO)-based bioinorganic nanocomposites promise unique structures, physicochemical properties, and novel biochemical functionalities, and within the past decade, investment in research on materials such as ZnO, TiO2, SiO2, and GeO2 has significantly increased. Besides traditional approaches, the synthesis, shaping, structural patterning, and postprocessing chemical functionalization of the materials surface is inspired by strategies which mimic processes in nature. Would such materials deliver new technologies? Answering this question requires the merging of historical knowledge and current research from different fields of science. Practically, we need an effective defragmentation of the research area. From our perspective, the superficial accounting of material properties, chemistry of the surfaces, and the behavior of biomolecules next to such surfaces is a problem. This is particularly of concern when we wish to bridge between technologies in vitro and biotechnologies in vivo. Further, besides the potential practical technological efficiency and advantages such materials might exhibit, we have to consider the wider long-term implications of material stability and toxicity. In this contribution, we present a critical review of recent advances in the chemistry and engineering of MO-based biocomposites, highlighting the role of interactions at the interface and the techniques by which these can be studied. At the end of the article, we outline the challenges which hamper progress in research and extrapolate to developing and promising directions including additive manufacturing and synthetic biology that could benefit from molecular level understanding of interactions occurring between inanimate (abiotic) and living (biotic) materials.
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Affiliation(s)
- Marion J Limo
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom.,Interface and Surface Analysis Centre, School of Pharmacy , University of Nottingham , University Park, Nottingham NG7 2RD , United Kingdom
| | - Anna Sola-Rabada
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Estefania Boix
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom.,Department of Bioproducts and Biosystems , Aalto University , P.O. Box 16100, FI-00076 Aalto , Finland
| | - Veeranjaneyulu Thota
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Zayd C Westcott
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Valeria Puddu
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Carole C Perry
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
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11
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D'Andrea P, Sciancalepore M, Veltruska K, Lorenzon P, Bandiera A. Epidermal Growth Factor - based adhesion substrates elicit myoblast scattering, proliferation, differentiation and promote satellite cell myogenic activation. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2018; 1866:504-517. [PMID: 30343052 DOI: 10.1016/j.bbamcr.2018.10.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 10/12/2018] [Accepted: 10/16/2018] [Indexed: 12/19/2022]
Abstract
The biochemical properties of muscle extracellular matrix are essential for stem cell adhesion, motility, proliferation and myogenic development. Recombinant elastin-like polypeptides are synthetic polypeptides that, besides maintaining some properties of the native protein, can be tailored by fusing bioactive sequences to their C-terminal. Our laboratory synthesized several Human Elastin-Like Polypeptides (HELP) derived from the sequence of human tropoelastin. Here, we developed a novel HELP family member by fusing the elastin-like backbone to the sequence of human Epidermal Growth Factor. We employed this synthetic protein, named HEGF, either alone or in combination with other proteins of the HELP family carrying RGD-integrin binding sites, as adhesion substrate for C2C12 myoblasts and satellite cells primary cultures. Adhesion of myoblasts to HEGF-based substrates induced scattering, decreased adhesion and cytoskeleton assembly; the concomitant presence of the RGD motifs potentiated all these effects. Recombinant substrates induced myoblasts proliferation, differentiation and the development of multinucleated myotubes, thus favoring myoblasts expansion and preserving their myogenic potential. The effects induced by adhesion substrates were inhibited by AG82 (Tyrphostin 25) and herbimycin A, indicating their dependence on the activation of both the EGF receptor and the tyrosine kinase c-src. Finally, HEGF increased the number of muscle stem cells (satellite cells) derived from isolated muscle fibers in culture, thus highlighting its potential as a novel substrate for skeletal muscle regeneration strategies.
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Affiliation(s)
- Paola D'Andrea
- Department of Life Sciences, University of Trieste, I-34127 Trieste, Italy.
| | - Marina Sciancalepore
- Department of Life Sciences, University of Trieste, I-34127 Trieste, Italy; Centre for Neuroscience B.R.A.I.N., University of Trieste, I-34127 Trieste, Italy
| | - Katerina Veltruska
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague V Holešovičkách 747/2, Praha 8, Czech Republic
| | - Paola Lorenzon
- Department of Life Sciences, University of Trieste, I-34127 Trieste, Italy; Centre for Neuroscience B.R.A.I.N., University of Trieste, I-34127 Trieste, Italy
| | - Antonella Bandiera
- Department of Life Sciences, University of Trieste, I-34127 Trieste, Italy
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12
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Zhu L, Zou DQ, Fan ZQ, Wang N, Bo YY, Zhang YQ, Guo G. Properties of a novel carboxymethyl chitosan derived from silkworm pupa. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2018; 99:e21499. [PMID: 30076774 DOI: 10.1002/arch.21499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 06/27/2018] [Accepted: 07/02/2018] [Indexed: 06/08/2023]
Abstract
In this study, a carboxymethyl chitosan derived from silkworm pupa (SP-carboxymethyl chitosan) was prepared. The physical characteristics of the SP chitin, chitosan, and carboxymethyl chitosan were analyzed. The scanning electron microscopy results showed that the surfaces of the samples from SP were more uneven, with more surface fractures compared with those of the reference substance (RS). Thermal analysis, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy analysis showed that the main molecular chain structures of SP samples and RSs had no substantial differences. However, the crystallinity and thermal decomposition temperature of the SP samples were lower compared with those of the RSs. All of these results provide a theoretical basis for the development of applications for the SP-carboxymethyl chitosan.
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Affiliation(s)
- Lin Zhu
- Functional Food Laboratory, Shandong Institute of Sericulture, Yantai, China
| | - De-Qing Zou
- Functional Food Laboratory, Shandong Institute of Sericulture, Yantai, China
| | - Zuo-Qing Fan
- Functional Food Laboratory, Shandong Institute of Sericulture, Yantai, China
| | - Na Wang
- Functional Food Laboratory, Shandong Institute of Sericulture, Yantai, China
| | - Ying-Ying Bo
- Functional Food Laboratory, Shandong Institute of Sericulture, Yantai, China
| | - Yu-Qing Zhang
- Silk Biotechnology Laboratory, Soochow University, Suzhou, China
| | - Guang Guo
- Functional Food Laboratory, Shandong Institute of Sericulture, Yantai, China
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13
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Bhujbal SV, Zemlyanov DY, Cavallaro A, Mangal S, Taylor LS, Zhou QT. Qualitative and Quantitative Characterization of Composition Heterogeneity on the Surface of Spray Dried Amorphous Solid Dispersion Particles by an Advanced Surface Analysis Platform with High Surface Sensitivity and Superior Spatial Resolution. Mol Pharm 2018; 15:2045-2053. [PMID: 29641898 DOI: 10.1021/acs.molpharmaceut.8b00122] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Surface composition critically impacts stability (e.g., crystallization) and performance (e.g., dissolution) of spray dried amorphous solid dispersion (ASD) formulations; however, traditional characterization techniques such as Raman and infrared spectroscopies may not provide useful information on surface composition on the spray dried ASD particles due to low spatial resolution, high probing depth, and lack of quantitative information. This study presents an advanced surface characterization platform consisting of two complementary techniques: X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). Such a platform enables qualitative and quantitative measurements of surface composition for the fine spray dried ASD particles with ultrasurface-sensitivity (less than 10 nm from the surface) and superior spatial resolution (approximately 250 nm for ToF-SIMS). Both XPS and ToF-SIMS demonstrated that the polymer (PVPVA) was dominantly enriched on the surface of our spray dried naproxen-PVPVA ASD particles. Of a particular note was that XPS could differentiate two batches of spray dried ASD particles with a subtle difference in surface composition produced by varying feed solution solvents. This advanced surface characterization platform will provide essential surface information to understand the mechanisms underlying the impact of surface composition on stability (e.g., crystallization) and functionality (e.g., dissolution) in future studies.
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Affiliation(s)
- Sonal V Bhujbal
- Department of Industrial, Physical Pharmacy, College of Pharmacy , Purdue University , 575 Stadium Mall Drive , West Lafayette , Indiana 47907 , United States
| | - Dmitry Y Zemlyanov
- Birck Nanotechnology Center , Purdue University , 1205 West State Street , West Lafayette , Indiana 47907 , United States
| | - Alex Cavallaro
- Future Industries Institute , University of South Australia , Mawson Lakes , South Australia 5095 , Australia
| | - Sharad Mangal
- Department of Industrial, Physical Pharmacy, College of Pharmacy , Purdue University , 575 Stadium Mall Drive , West Lafayette , Indiana 47907 , United States
| | - Lynne S Taylor
- Department of Industrial, Physical Pharmacy, College of Pharmacy , Purdue University , 575 Stadium Mall Drive , West Lafayette , Indiana 47907 , United States
| | - Qi Tony Zhou
- Department of Industrial, Physical Pharmacy, College of Pharmacy , Purdue University , 575 Stadium Mall Drive , West Lafayette , Indiana 47907 , United States
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14
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Zeng K, Li Q, Wang J, Yin G, Zhang Y, Xiao C, Fan T, Zhao X, Zheng X. One-step methodology for the direct covalent capture of GPCRs from complex matrices onto solid surfaces based on the bioorthogonal reaction between haloalkane dehalogenase and chloroalkanes. Chem Sci 2017; 9:446-456. [PMID: 29629116 PMCID: PMC5868316 DOI: 10.1039/c7sc03887a] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 10/18/2017] [Indexed: 12/29/2022] Open
Abstract
An approach is established for the specific immobilization of GPCRs from cell lysates that circumvents labor intensive purification procedures and minimize loss of activity.
Protein immobilization techniques play an important role in the development of assays for disease diagnosis and drug discovery. However, many of these approaches are not applicable to transmembrane proteins. G protein-coupled receptors (GPCRs) are the largest protein superfamily encoded by the human genome and are targeted by a quarter of all prescription drugs. GPCRs are highly dynamic and sensitive to changes in the ambient environment, and current immobilization methodologies are not suitable for GPCRs. We used haloalkane dehalogenase (Halo) as an immobilization tag fused to the β2-adrenoceptor (β2-AR), angiotensin II type 1 (AT1) and angiotensin II type 2 (AT2) receptors. The engineered Halo-tag covalently binds to a specific substrate chloroalkane through Asp 106 in the catalytic pocket. The Halo-tagged GPCRs were expressed in Escherichia coli at a suitable yield. Accordingly, we loaded cell lysate containing Halo-tagged GPCRs onto a macroporous silica gel coated with chloroalkane. Morphological characterization indicated a homogeneous monolayer of immobilized Halo-tagged GPCRs on the silica gel surface. The immobilized receptors proved to be surrounded by specific bound phospholipids including PG C18:1/C18:1. We observed a radio-ligand binding ability and ligand-induced conformational changes in the immobilized GPCRs, suggesting the preservation of bioactivity. This method is a one-step approach for the specific immobilization of GPCRs from cell lysates and validates that immobilized receptors retain canonical ligand binding capacity. Our immobilization strategy circumvents labor-intensive purification procedures and minimizes loss of activity. The immobilized receptors can be applied to high-throughput drug and interaction partner screening for GPCRs.
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Affiliation(s)
- Kaizhu Zeng
- Key Laboratory of Resource Biology and Biotechnology in Western China , Ministry of Education , College of Life Sciences , Northwest University , Xi'an 710069 , China . ; ; Tel: +86 029 88302686
| | - Qian Li
- Key Laboratory of Resource Biology and Biotechnology in Western China , Ministry of Education , College of Life Sciences , Northwest University , Xi'an 710069 , China . ; ; Tel: +86 029 88302686
| | - Jing Wang
- Key Laboratory of Resource Biology and Biotechnology in Western China , Ministry of Education , College of Life Sciences , Northwest University , Xi'an 710069 , China . ; ; Tel: +86 029 88302686
| | - Guowei Yin
- Department of Biochemistry and Biophysics , University of North Carolina at Chapel Hill , NC , USA
| | - Yajun Zhang
- Key Laboratory of Resource Biology and Biotechnology in Western China , Ministry of Education , College of Life Sciences , Northwest University , Xi'an 710069 , China . ; ; Tel: +86 029 88302686
| | - Chaoni Xiao
- Key Laboratory of Resource Biology and Biotechnology in Western China , Ministry of Education , College of Life Sciences , Northwest University , Xi'an 710069 , China . ; ; Tel: +86 029 88302686
| | - Taiping Fan
- Key Laboratory of Resource Biology and Biotechnology in Western China , Ministry of Education , College of Life Sciences , Northwest University , Xi'an 710069 , China . ; ; Tel: +86 029 88302686.,Department of Pharmacology , University of Cambridge , Cambridge CB2 1PD , UK
| | - Xinfeng Zhao
- Key Laboratory of Resource Biology and Biotechnology in Western China , Ministry of Education , College of Life Sciences , Northwest University , Xi'an 710069 , China . ; ; Tel: +86 029 88302686
| | - Xiaohui Zheng
- Key Laboratory of Resource Biology and Biotechnology in Western China , Ministry of Education , College of Life Sciences , Northwest University , Xi'an 710069 , China . ; ; Tel: +86 029 88302686
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15
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McDermott MD, Otto KJ. The effect of multiple thin-film coatings of protein loaded sol-gel on total multi-electrode array thickness. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2017; 2016:129-132. [PMID: 28268296 DOI: 10.1109/embc.2016.7590657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Tetramethyl orthosilicate shows promise as a thin-film delivery vehicle for multi-electrode arrays for drug release and electrical performance; however, its effect upon device footprint has yet to be assessed. Using a previously established silicon wafer chip model, the thickness of one, two, and four protein doped coatings of sol-gel were analyzed via profilometry. Coating thickness was found to be 0.4μm, 1.1μm and 2.2μm on each side of the device. This addition to a native MEA is minimal when compared to other drug delivery paradigms currently associated with neural implants.
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16
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Ozturk Kirbay F, Ayranci R, Ak M, Odaci Demirkol D, Timur S. Rhodamine functionalized conducting polymers for dual intention: electrochemical sensing and fluorescence imaging of cells. J Mater Chem B 2017; 5:7118-7125. [DOI: 10.1039/c7tb01716b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report here the electrochemical co-polymerization of two functional monomers; one containing fluorescent rhodamine dye (RF) and the other monomer having amine groups (RD), onto electroactive Indium Tin Oxide (ITO) glass.
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Affiliation(s)
| | - Rukiye Ayranci
- Pamukkale University
- Faculty of Art and Science
- Chemistry Department
- 20017 Denizli
- Turkey
| | - Metin Ak
- Pamukkale University
- Faculty of Art and Science
- Chemistry Department
- 20017 Denizli
- Turkey
| | | | - Suna Timur
- Ege University
- Faculty of Science
- Biochemistry Department
- Izmir
- Turkey
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17
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Dao ATN, Nakayama K, Shimokata J, Taniike T. Multilateral characterization of recombinant spider silk in thermal degradation. Polym Chem 2017. [DOI: 10.1039/c6py01954d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Elucidating the complex mechanism of thermo-oxidative degradation of recombinant spider silk by systematic characterization and correlation coefficient approach.
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Affiliation(s)
- Anh T. N. Dao
- School of Materials Science
- Japan Advanced Institute of Science and Technology
- Nomi
- Japan
| | - K. Nakayama
- School of Materials Science
- Japan Advanced Institute of Science and Technology
- Nomi
- Japan
| | - J. Shimokata
- School of Materials Science
- Japan Advanced Institute of Science and Technology
- Nomi
- Japan
- Spiber Inc
| | - T. Taniike
- School of Materials Science
- Japan Advanced Institute of Science and Technology
- Nomi
- Japan
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18
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Wigzell J, Racovita R, Stentiford B, Wilson M, Harris M, Fletcher I, Mosquin D, Justice D, Beaumont S, Jetter R, Badyal J. Smart water channelling through dual wettability by leaves of the bamboo Phyllostachys aurea. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.06.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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19
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Sahapaibounkit P, Prasertsung I, Mongkolnavin R, Wong CS, Damrongsakkul S. A two-step method using air plasma and carbodiimide crosslinking to enhance the biocompatibility of polycaprolactone. J Biomed Mater Res B Appl Biomater 2016; 105:1658-1666. [PMID: 27177842 DOI: 10.1002/jbm.b.33708] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 04/22/2016] [Accepted: 04/24/2016] [Indexed: 11/11/2022]
Abstract
In this study, polycaprolactone (PCL) film, a high potential material used in biomedical applications, was treated by air plasma prior to a conjugation by carbodiimide cross-linking with various types of proteins, including type A gelatin, type B gelatin, and collagen hydrolysate. The properties of modified PCL films were characterized by X-ray photoelectron spectroscopy (XPS), contact angle measurement, and atomic force microscopy. The XPS results showed that oxygen and nitrogen atoms were successfully introduced on the air plasma-treated PCL surface. Primary amine was found on the air plasma-treated PCL films. All proteins were shown to be successfully cross-linked on air plasma-treated PCL films. The wettability and roughness of protein-conjugated PCL films were significantly increased compared to those of neat PCL film. In vitro biocompatibility test using L929 mouse fibroblast showed that the attachment percentage and spreading area of attached cells on all protein-conjugated PCL films were markedly increased. Comparing among modified PCL films, no significant difference on the attachment of L929 on modified PCL films was noticed. However, the spreading areas of cells after 24 hours of culture on type A gelatin- and type B gelatin-modified PCL surfaces were higher than that on collagen hydrolysate-modified surface, possibly related to the lower percentage of amide bond on collagen hydrolysate-conjugated surface compared to those on both gelatin-conjugated PCL ones. This indicated that the two-step modification of PCL film via air plasma and carbodiimide cross-linking with collagen-derived proteins could enhance the biocompatibility of PCL films. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1658-1666, 2017.
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Affiliation(s)
- Paramaporn Sahapaibounkit
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand
| | - Isarawut Prasertsung
- Chemical Engineering Program, Department of Industrial Engineering, Faculty of Engineering, Naresuan University, Phitsanulok, Thailand.,Plasma Technology and Nuclear Fusion Research Unit, Chulalongkorn University, Bangkok, Thailand
| | - Rattachat Mongkolnavin
- Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, Thailand.,Plasma Technology and Nuclear Fusion Research Unit, Chulalongkorn University, Bangkok, Thailand
| | - Chiow San Wong
- Plasma Technology Research Center, Physics Department, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Siriporn Damrongsakkul
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand.,Plasma Technology and Nuclear Fusion Research Unit, Chulalongkorn University, Bangkok, Thailand
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20
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Song Y, Zemlyanov D, Chen X, Nie H, Su Z, Fang K, Yang X, Smith D, Byrn S, Lubach JW. Acid–Base Interactions of Polystyrene Sulfonic Acid in Amorphous Solid Dispersions Using a Combined UV/FTIR/XPS/ssNMR Study. Mol Pharm 2015; 13:483-92. [PMID: 26716395 DOI: 10.1021/acs.molpharmaceut.5b00708] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yang Song
- Department
of Industrial and Physical Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
| | - Dmitry Zemlyanov
- Birck
Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Xin Chen
- GlaxoSmithKline, Collegeville, Pennsylvania 19426, United States
| | - Haichen Nie
- Department
of Industrial and Physical Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
| | - Ziyang Su
- Center
for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | - Ke Fang
- Department
of Industrial and Physical Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
| | - Xinghao Yang
- College
of Life Sciences, Nanjing Normal University, Nanjing 210046, P. R. China
| | - Daniel Smith
- Department
of Industrial and Physical Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
| | - Stephen Byrn
- Department
of Industrial and Physical Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
| | - Joseph W. Lubach
- Small Molecule
Pharmaceutical Sciences, Genentech, Inc., South San Francisco, California 94080, United States
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21
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Wang HY, Chen YY, Zhang YQ. Processing and characterization of powdered silk micro- and nanofibers by ultrasonication. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 48:444-52. [DOI: 10.1016/j.msec.2014.12.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 10/24/2014] [Accepted: 12/05/2014] [Indexed: 01/26/2023]
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22
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Sommakia S, Lee HC, Gaire J, Otto KJ. Materials approaches for modulating neural tissue responses to implanted microelectrodes through mechanical and biochemical means. CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE 2014; 18:319-328. [PMID: 25530703 PMCID: PMC4267064 DOI: 10.1016/j.cossms.2014.07.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Implantable intracortical microelectrodes face an uphill struggle for widespread clinical use. Their potential for treating a wide range of traumatic and degenerative neural disease is hampered by their unreliability in chronic settings. A major factor in this decline in chronic performance is a reactive response of brain tissue, which aims to isolate the implanted device from the rest of the healthy tissue. In this review we present a discussion of materials approaches aimed at modulating the reactive tissue response through mechanical and biochemical means. Benefits and challenges associated with these approaches are analyzed, and the importance of multimodal solutions tested in emerging animal models are presented.
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Affiliation(s)
- Salah Sommakia
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907-1791
| | - Heui C. Lee
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907-1791
| | - Janak Gaire
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907-1791
| | - Kevin J. Otto
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907-1791
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907-1791
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23
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He C, Wang L, Liu J, Liu X, Li X, Ma J, Lin Y, Xu F. Evidence for 'silicon' within the cell walls of suspension-cultured rice cells. THE NEW PHYTOLOGIST 2013; 200:700-709. [PMID: 23834738 DOI: 10.1111/nph.12401] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Accepted: 06/06/2013] [Indexed: 05/04/2023]
Abstract
Despite the ubiquity and beneficial role of silicon (Si) in plant biology, structural and chemical mechanisms operating at the single-cell level have not been extensively studied. To obtain insights regarding the effect of Si on individual cells, we cultivated suspended rice (Oryza sativa) cells in the absence and presence of Si and analyzed single cells using a combination of physical techniques including atomic force microscopy (AFM). Si is naturally present as a constituent of the cell walls, where it is firmly bound to the cell wall matrix rather than occurring within intra- or extracellular silica deposition, as determined by using inductively coupled plasma mass spectrometry (ICP-MS) and X-ray photoelectron spectroscopy (XPS). This species of Si, linked with the cell wall matrix, improves the structural stability of cell walls during their expansion and subsequent cell division. Maintaining cell shape is thereby enhanced, which may be crucial for the function and survival of cells. This study provides further evidence that organosilicon is present in plant cell walls, which broadens our understanding of the chemical nature of 'anomalous Si' in plant biology.
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Affiliation(s)
- Congwu He
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Lijun Wang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Jian Liu
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Xin Liu
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Xiuli Li
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Jie Ma
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Yongjun Lin
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Fangsen Xu
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
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24
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Amornsudthiwat P, Mongkolnavin R, Kanokpanont S, Panpranot J, Wong CS, Damrongsakkul S. Improvement of early cell adhesion on Thai silk fibroin surface by low energy plasma. Colloids Surf B Biointerfaces 2013; 111:579-86. [PMID: 23893032 DOI: 10.1016/j.colsurfb.2013.07.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 05/16/2013] [Accepted: 07/03/2013] [Indexed: 11/25/2022]
Abstract
Low energy plasma has been introduced to treat the surface of Thai silk fibroin which should be enhanced for cell adhesion due to its native hydrophobic surface. Plasma surface treatment could introduce desirable hydrophilic functionalities on the surface without using any chemicals. In this work, nitrogen glow discharge plasma was generated by a low energy AC50Hz power supply system. The plasma operating conditions were optimized to reach the highest nitrogen active species by using optical emission spectroscopy. X-ray photoelectron spectroscopy (XPS) revealed that amine, hydroxyl, ether, and carboxyl groups were induced on Thai silk fibroin surface after plasma treatment. The results on Fourier transform infrared attenuated total reflection (FTIR-ATR) spectroscopy confirmed that the plasma treated effects were only on the outermost layer since there was no change in the bulk chemistry. The surface topography was insignificantly changed from the detection with atomic force microscopy (AFM). The plasma-treated effects were the improved surface wettability and cell adhesion. After a 90-s treatment, the water contact angle was at 20°, while the untreated surface was at 70°. The early cell adhesion of L929 mouse fibroblast was accelerated. L929 cells only took 3h to reach 100% cell adhesion on 90 s N2 plasma-treated surface, while there was less than 50% cell adhesion on the untreated Thai silk fibroin surface after 6h of culture. The cell adhesion results were in agreement with the cytoskeleton development. L929 F-actin was more evident on 90 s N2 plasma-treated surface than others. It could be concluded that a lower energy AC50Hz plasma system enhanced early L929 mouse fibroblast adhesion on Thai silk fibroin surface without any significant change in surface topography and bulk chemistry.
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Affiliation(s)
- Phakdee Amornsudthiwat
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Phyathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Rattachat Mongkolnavin
- Department of Physics, Faculty of Science, Chulalongkorn University, Phyathai Road, Pathumwan, Bangkok 10330, Thailand; Plasma Technology and Nuclear Fusion Research Unit, Chulalongkorn University, 10330 Bangkok, Thailand
| | - Sorada Kanokpanont
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Phyathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Joongjai Panpranot
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Phyathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Chiow San Wong
- Plasma Technology Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Siriporn Damrongsakkul
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Phyathai Road, Pathumwan, Bangkok 10330, Thailand; Plasma Technology and Nuclear Fusion Research Unit, Chulalongkorn University, 10330 Bangkok, Thailand.
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25
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X-Ray Photoelectron Spectroscopy for Characterization of Bionanocomposite Functional Materials for Energy-Harvesting Technologies. Chemphyschem 2013; 14:2071-80. [DOI: 10.1002/cphc.201300037] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 04/12/2013] [Indexed: 11/07/2022]
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26
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Przybylowski C, Quinn T, Callahan A, Kaplan M, Golding A, Alesi C, Ammar M, LeBlon CE, Guo Y, Zhang X, Jedlicka SS. MC3T3 preosteoblast differentiation on bone morphogenetic protein-2 peptide ormosils. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm16490f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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27
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Eby DM, Artyushkova K, Paravastu AK, Johnson GR. Probing the molecular structure of antimicrobial peptide-mediated silica condensation using X-ray photoelectron spectroscopy. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm30837a] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Park JH, Schwartz Z, Olivares-Navarrete R, Boyan BD, Tannenbaum R. Enhancement of surface wettability via the modification of microtextured titanium implant surfaces with polyelectrolytes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:5976-85. [PMID: 21513319 PMCID: PMC4287413 DOI: 10.1021/la2000415] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Micrometer- and submicrometer-scale surface roughness enhances osteoblast differentiation on titanium (Ti) substrates and increases bone-to-implant contact in vivo. However, the low surface wettability induced by surface roughness can retard initial interactions with the physiological environment. We examined chemical modifications of Ti surfaces [pretreated (PT), R(a) ≤ 0.3 μm; sand blasted/acid etched (SLA), R(a) ≥ 3.0 μm] in order to modify surface hydrophilicity. We designed coating layers of polyelectrolytes that did not alter the surface microstructure but increased surface ionic character, including chitosan (CHI), poly(L-glutamic acid) (PGA), and poly(L-lysine) (PLL). Ti disks were cleaned and sterilized. Surface chemical composition, roughness, wettability, and morphology of surfaces before and after polyelectrolyte coating were examined by X-ray photoelectron spectroscopy (XPS), contact mode profilometry, contact angle measurement, and scanning electron microscopy (SEM). High-resolution XPS spectra data validated the formation of polyelectrolyte layers on top of the Ti surface. The surface coverage of the polyelectrolyte adsorbed on Ti surfaces was evaluated with the pertinent SEM images and XPS peak intensity as a function of polyelectrolyte adsorption time on the Ti surface. PLL was coated in a uniform thin layer on the PT surface. CHI and PGA were coated evenly on PT, albeit in an incomplete monolayer. CHI, PGA, and PLL were coated on the SLA surface with complete coverage. The selected polyelectrolytes enhanced surface wettability without modifying surface roughness. These chemically modified surfaces on implant devices can contribute to the enhancement of osteoblast differentiation.
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Affiliation(s)
- Jung Hwa Park
- Schools of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States
| | - Zvi Schwartz
- Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States
| | | | - Barbara D. Boyan
- Schools of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States
- Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States
| | - Rina Tannenbaum
- Schools of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States
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29
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Jewett S, Zemlyanov D, Ivanisevic A. Characterization of peptide adsorption on InAs using X-ray photoelectron spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:3774-3782. [PMID: 21401068 DOI: 10.1021/la104963v] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The well-defined structure and high stability of peptides make them attractive biotemplates for low-temperature synthesis of semiconductor nanocrystals. Adsorbed peptide monolayers could also potentially passivate semiconductors by preventing regrowth of the oxide layer. In this work, the adsorption and passivation capabilities of different collagen-binding peptides on InAs surfaces were analyzed by X-ray photoelectron spectroscopy (XPS). Before peptide functionalization, Br(2)- and HCl-based etches were used to remove the native oxide layer on the InAs surfaces. The presence of the N 1s peak for peptide-functionalized samples confirms the adsorption of peptides onto the etched InAs surfaces. Calculated coverages were similar for all peptide sequences and ranged from ∼20 to 40% of a monolayer using the deconvoluted C 1s spectra and from ∼2 to 5% for the N 1s spectra. The passivation ability of the peptides was analyzed by comparing the ratios of the oxide components to the nonoxide components in the XPS spectra. The thickness of the oxide layer was also approximated by accounting for the attenuation of the substrate photoelectrons through the oxide layer. We find that the oxide layer regrowth still occurs after peptide functionalization. However, the oxide layer thicknesses for peptide-functionalized samples do not reach as received levels, indicating that the peptides do have some passivation ability on InAs.
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Affiliation(s)
- Scott Jewett
- Weldon School of Biomedical Engineering, ‡Birck Nanotechnology Center, §Department of Chemical Engineering, and ∥Department of Chemistry, Purdue University , West Lafayette, Indiana 47907, United States
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Tache A, Cotrone S, Litescu SC, Cioffi N, Torsi L, Sabbatini L, Radu GL. Spectrochemical Characterization of Thin Layers of Lipoprotein Self-Assembled Films on Solid Supports Under Oxidation Process. ANAL LETT 2011. [DOI: 10.1080/00032711003790098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Dasog M, Rachinsky C, Veinot JGC. From Si and C encapsulated SiO2 to SiC: exploring the influence of sol–gel polymer substitution on thermally induced nanocrystal formation. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11858g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pierce AL, Sommakia S, Rickus JL, Otto KJ. Thin-film silica sol–gel coatings for neural microelectrodes. J Neurosci Methods 2009; 180:106-10. [DOI: 10.1016/j.jneumeth.2009.02.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2008] [Revised: 02/15/2009] [Accepted: 02/16/2009] [Indexed: 11/16/2022]
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Wampler HP, Zemlyanov DY, Lee K, Janes DB, Ivanisevic A. Mixed adlayer of alkanethiol and peptide on GaAs(100): quantitative characterization by X-ray photoelectron spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:3164-3170. [PMID: 18275237 DOI: 10.1021/la703543g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Homogeneous and mixed adlayers composed of an alkanethiol (1-octadecanethiol, ODT) and a peptide (CGISYGRKKRRQRRR) on GaAs(100) were formed in two different solvent systems: phosphate-buffered saline (PBS) and N,N-dimethylformamide (DMF). The chemical composition of each adlayer was characterized by X-ray photoelectron spectroscopy (XPS). The data showed that the makeup of the adlayer and its stability largely depends on the solvent used. Angle-resolved XPS also revealed that the adlayer thickness and tilt angles were different from values obtained from ellipsometry measurements and vastly varied between the two solvents used. The coverage data extracted from the XPS measurements indicated that homogeneous adlayers of peptide in PBS buffer form a multilayered film. Homogeneous alkanethiol adlayers exhibited monolayer coverage under all solvent treatments. Coadsorbed layers containing both alkanethiol and peptide have fractional monolayer coverage in both solvents.
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Affiliation(s)
- Heeyeon P Wampler
- Department of Chemistry, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
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Jedlicka SS, Little KM, Nivens DE, Zemlyanov D, Rickus JL. Peptide ormosils as cellular substrates. ACTA ACUST UNITED AC 2007. [DOI: 10.1039/b705393b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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