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Abbas A, Zhang C, Asad M, Waqas A, Khatoon A, Hussain S, Mir SH. Recent Developments in Artificial Super-Wettable Surfaces Based on Bioinspired Polymeric Materials for Biomedical Applications. Polymers (Basel) 2022; 14:238. [PMID: 35054645 PMCID: PMC8781395 DOI: 10.3390/polym14020238] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 12/29/2021] [Accepted: 01/02/2022] [Indexed: 02/06/2023] Open
Abstract
Inspired by nature, significant research efforts have been made to discover the diverse range of biomaterials for various biomedical applications such as drug development, disease diagnosis, biomedical testing, therapy, etc. Polymers as bioinspired materials with extreme wettable properties, such as superhydrophilic and superhydrophobic surfaces, have received considerable interest in the past due to their multiple applications in anti-fogging, anti-icing, self-cleaning, oil-water separation, biosensing, and effective transportation of water. Apart from the numerous technological applications for extreme wetting and self-cleaning products, recently, super-wettable surfaces based on polymeric materials have also emerged as excellent candidates in studying biological processes. In this review, we systematically illustrate the designing and processing of artificial, super-wettable surfaces by using different polymeric materials for a variety of biomedical applications including tissue engineering, drug/gene delivery, molecular recognition, and diagnosis. Special attention has been paid to applications concerning the identification, control, and analysis of exceedingly small molecular amounts and applications permitting high cell and biomaterial cell screening. Current outlook and future prospects are also provided.
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Affiliation(s)
- Ansar Abbas
- School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, China; (A.A.); (C.Z.)
| | - Chen Zhang
- School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, China; (A.A.); (C.Z.)
| | - Muhammad Asad
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China;
| | - Ahsan Waqas
- Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China;
| | - Asma Khatoon
- College of Business Administration, Imam Abdulrahman Bin Faisal University, Dammam 34212, Saudi Arabia;
| | - Sameer Hussain
- School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, China; (A.A.); (C.Z.)
| | - Sajjad Husain Mir
- School of Chemistry and Advanced Materials & BioEngineering Research (AMBER) Center, Trinity College Dublin, The University of Dublin, D02 PN40 Dublin, Ireland
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Chen Z, Zhang Z. Recent progress in beetle-inspired superhydrophilic-superhydrophobic micropatterned water-collection materials. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 82:207-226. [PMID: 32941164 DOI: 10.2166/wst.2020.238] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Biological creatures with unique surface wettability have long served as a source of inspiration for scientists and engineers. More specifically, certain beetle species in the Namib Desert have evolved to collect water from fog on their backs by way of wettability patterns, which attracted an ongoing interest in biomimetic studies. Bioinspired materials exhibiting extreme wetting properties, such as superhydrophilic and superhydrophobic surfaces, have attracted considerable attention because of their potential use in various applications. Combining these two extreme states of superhydrophilicity and superhydrophobicity on the same surface in precise two-dimensional micropatterns opens exciting new functionalities and possibilities for a wide variety of applications. In this review we briefly describe the water-harvesting mechanisms of a genus of Namib Desert beetle, Stenocarpa, consisting of the theory of wetting and transporting. Then we describe the methods for fabricating superhydrophilic-superhydrophobic patterns and highlight some of the newer and emerging applications of these patterned substrates that are currently being explored. Finally, we provide conclusions and outlook concerning the future development of bioinspired surfaces of patterned wettability.
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Affiliation(s)
- Zhen Chen
- School of Mechanical Electronic & Information Engineering, China University of Mining and Technology, Beijing 100083, China E-mail:
| | - Zengzhi Zhang
- Research Institute of Ecological and Functional Material, China University of Mining and Technology, Beijing 100083, China
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3
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Corbière V, Segers J, Desmet R, Lecher S, Loyens M, Petit E, Melnyk O, Locht C, Mascart F. Natural T Cell Epitope Containing Methyl Lysines on Mycobacterial Heparin-Binding Hemagglutinin. THE JOURNAL OF IMMUNOLOGY 2020; 204:1715-1723. [PMID: 32122997 DOI: 10.4049/jimmunol.1901214] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 01/30/2020] [Indexed: 11/19/2022]
Abstract
T cell epitopes are mostly nonmodified peptides, although posttranslationally modified peptide epitopes have been described, but they originated from viral or self-proteins. In this study, we provide evidence of a bacterial methylated T cell peptide epitope. The mycobacterial heparin-binding hemagglutinin (HBHA) is a protein Ag with a complex C-terminal methylation pattern and is recognized by T cells from humans latently infected with Mycobacterium tuberculosis By comparing native HBHA with recombinant HBHA produced in Mycobacterium smegmatis (rHBHA-Ms), we could link antigenic differences to differences in the methylation profile. Peptide scan analyses led to the discovery of a peptide containing methyl lysines recognized by a mAb that binds to native HBHA ∼100-fold better than to rHBHA-Ms This peptide was also recognized by T cells from latently infected humans, as evidenced by IFN-γ release upon peptide stimulation. The nonmethylated peptide did not induce IFN-γ, arguing that the methyl lysines are part of the T cell epitope.
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Affiliation(s)
- Véronique Corbière
- Laboratory of Vaccinology and Mucosal Immunity, Université Libre de Bruxelles, 1070 Brussels, Belgium
| | - Jérôme Segers
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 8204-Center for Infection and Immunity of Lille, F-59000 Lille, France; and
| | - Rémi Desmet
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 8204-Center for Infection and Immunity of Lille, F-59000 Lille, France; and
| | - Sophie Lecher
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 8204-Center for Infection and Immunity of Lille, F-59000 Lille, France; and
| | - Marc Loyens
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 8204-Center for Infection and Immunity of Lille, F-59000 Lille, France; and
| | - Emmanuelle Petit
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 8204-Center for Infection and Immunity of Lille, F-59000 Lille, France; and
| | - Oleg Melnyk
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 8204-Center for Infection and Immunity of Lille, F-59000 Lille, France; and
| | - Camille Locht
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 8204-Center for Infection and Immunity of Lille, F-59000 Lille, France; and
| | - Françoise Mascart
- Laboratory of Vaccinology and Mucosal Immunity, Université Libre de Bruxelles, 1070 Brussels, Belgium; .,Immunobiology Clinic, Hôpital Erasme, Université Libre de Bruxelles, 1070 Brussels, Belgium
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Shin S, Seo J, Han H, Kang S, Kim H, Lee T. Bio-Inspired Extreme Wetting Surfaces for Biomedical Applications. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E116. [PMID: 28787916 PMCID: PMC5456462 DOI: 10.3390/ma9020116] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/04/2016] [Accepted: 02/15/2016] [Indexed: 12/11/2022]
Abstract
Biological creatures with unique surface wettability have long served as a source of inspiration for scientists and engineers. More specifically, materials exhibiting extreme wetting properties, such as superhydrophilic and superhydrophobic surfaces, have attracted considerable attention because of their potential use in various applications, such as self-cleaning fabrics, anti-fog windows, anti-corrosive coatings, drag-reduction systems, and efficient water transportation. In particular, the engineering of surface wettability by manipulating chemical properties and structure opens emerging biomedical applications ranging from high-throughput cell culture platforms to biomedical devices. This review describes design and fabrication methods for artificial extreme wetting surfaces. Next, we introduce some of the newer and emerging biomedical applications using extreme wetting surfaces. Current challenges and future prospects of the surfaces for potential biomedical applications are also addressed.
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Affiliation(s)
- Sera Shin
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Jungmok Seo
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Heetak Han
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Subin Kang
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Hyunchul Kim
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Taeyoon Lee
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea.
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Lu L, Gao Y, Zhang Z, Cao Q, Zhang X, Zou J, Cao Y. Kdm2a/b Lysine Demethylases Regulate Canonical Wnt Signaling by Modulating the Stability of Nuclear β-Catenin. Dev Cell 2015; 33:660-74. [PMID: 26004508 DOI: 10.1016/j.devcel.2015.04.006] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2013] [Revised: 10/02/2014] [Accepted: 04/02/2015] [Indexed: 11/25/2022]
Abstract
In the absence of Wnt activation, cytosolic β-catenin is degraded through GSK3/CK1-mediated phosphorylation at the N terminus. Here, we show that, upon Wnt activation, the stability of nuclear β-catenin is regulated via methylation/demethylation. The protein lysine demethylases Kdm2a and Kdm2b regulate the turnover of non-phosphorylated β-catenin specifically within the nucleus via direct interaction with the fourth and fifth armadillo repeats. The lysine residues within this region are required for the methylation of non-phosphorylated β-catenin, which is demethylated by Kdm2a/b and subsequently ubiquitylated. During Xenopus embryogenesis, kdm2a/b genes are transcribed during early embryogenesis and are required for the specification of the body axis. Kdm2a/b knockdown in Xenopus embryos leads to increases in non-phosphorylated and methylated β-catenin, concurrent with the upregulation of β-catenin target genes. This mechanism is required for controlling the output of the Wnt/β-catenin signaling pathway to maintain normal cellular functions.
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Affiliation(s)
- Lei Lu
- Model Animal Research Center of Nanjing University and MOE Key Laboratory of Model Animals for Disease Study, 12 Xuefu Road, Pukou High-Tech Zone, Nanjing 210061, China
| | - Yan Gao
- Model Animal Research Center of Nanjing University and MOE Key Laboratory of Model Animals for Disease Study, 12 Xuefu Road, Pukou High-Tech Zone, Nanjing 210061, China
| | - Zan Zhang
- Model Animal Research Center of Nanjing University and MOE Key Laboratory of Model Animals for Disease Study, 12 Xuefu Road, Pukou High-Tech Zone, Nanjing 210061, China
| | - Qing Cao
- Model Animal Research Center of Nanjing University and MOE Key Laboratory of Model Animals for Disease Study, 12 Xuefu Road, Pukou High-Tech Zone, Nanjing 210061, China
| | - Xuena Zhang
- Model Animal Research Center of Nanjing University and MOE Key Laboratory of Model Animals for Disease Study, 12 Xuefu Road, Pukou High-Tech Zone, Nanjing 210061, China
| | - Jianghuan Zou
- Model Animal Research Center of Nanjing University and MOE Key Laboratory of Model Animals for Disease Study, 12 Xuefu Road, Pukou High-Tech Zone, Nanjing 210061, China
| | - Ying Cao
- Model Animal Research Center of Nanjing University and MOE Key Laboratory of Model Animals for Disease Study, 12 Xuefu Road, Pukou High-Tech Zone, Nanjing 210061, China.
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6
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Micro-and nanostructured silicon-based superomniphobic surfaces. J Colloid Interface Sci 2014; 416:280-8. [DOI: 10.1016/j.jcis.2013.10.065] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 10/28/2013] [Accepted: 10/31/2013] [Indexed: 11/20/2022]
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Piret G, Perez MT, Prinz CN. Substrate porosity induces phenotypic alterations in retinal cells cultured on silicon nanowires. RSC Adv 2014. [DOI: 10.1039/c4ra04121f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Limitations of silicon nanowire arrays produced using chemical etching for drug delivery.
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Affiliation(s)
- Gaëlle Piret
- Division of Solid State Physics
- Lund University
- SE-221 00 Lund, Sweden
- Neuronano Research Center
- Lund University
| | - Maria-Thereza Perez
- Department of Clinical Sciences
- Division of Ophthalmology
- Lund University
- SE-221 84 Lund, Sweden
- The Nanometer Structure Consortium
| | - Christelle N. Prinz
- Division of Solid State Physics
- Lund University
- SE-221 00 Lund, Sweden
- Neuronano Research Center
- Lund University
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8
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Fellahi O, Sarma RK, Das MR, Saikia R, Marcon L, Coffinier Y, Hadjersi T, Maamache M, Boukherroub R. The antimicrobial effect of silicon nanowires decorated with silver and copper nanoparticles. NANOTECHNOLOGY 2013; 24:495101. [PMID: 24231372 DOI: 10.1088/0957-4484/24/49/495101] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The paper reports on the preparation and antibacterial activity of silicon nanowire (SiNW) substrates coated with Ag or Cu nanoparticles (NPs) against Escherichia coli (E. coli) bacteria. The substrates are easily prepared using the metal-assisted chemical etching of crystalline silicon in hydrofluoric acid/silver nitrate (HF/AgNO3) aqueous solution. Decoration of the SiNWs with metal NPs is achieved by simple immersion in HF aqueous solutions containing silver or copper salts. The SiNWs coated with Ag NPs are biocompatible with human lung adenocarcinoma epithelial cell line A549 while possessing strong antibacterial properties to E. coli. In contrast, the SiNWs decorated with Cu NPs showed higher cytotoxicity and slightly lower antibacterial activity. Moreover, it was also observed that leakage of sugars and proteins from the cell wall of E. coli in interaction with SiNWs decorated with Ag NPs is higher compared to SiNWs modified with Cu NPs.
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Affiliation(s)
- Ouarda Fellahi
- Institut de Recherche Interdisciplinaire (IRI, USR-3078), Université Lille1, Parc de la Haute Borne, 50 avenue de Halley, BP 70478, F-59658 Villeneuve d'Ascq, France. Unité de Développement de la Technologie du Silicium (UDTS), 2, Bd. Frantz Fanon, BP 140 Alger-7 merveilles, Algiers, Algeria. Laboratoire de Physique Quantique et Systèmes Dynamiques, Département de Physique, Université de Sétif, Sétif 19000, Algeria
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9
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Cegłowski M, Schroeder G. Laser desorption/ionization mass spectrometric analysis of surfactants on functionalized carbon nanotubes. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2013; 27:258-264. [PMID: 23239340 DOI: 10.1002/rcm.6448] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 10/19/2012] [Accepted: 10/21/2012] [Indexed: 06/01/2023]
Abstract
RATIONALE Recently, unmodified and carboxylated carbon nanotubes have been used as assisting surfaces laser desorption/ionization (LDI) in mass spectrometry. The functionalization of carbon nanotubes with organic compounds should lead to a gamut of other promising LDI-assisting surfaces. METHODS Carboxylated carbon nanotubes were functionalized with sinapinic acid either covalently or by creating an ionic macro-complex. Polyether-based surfactants were used as analytes to examine the properties of these new matrices. Mass spectrometric analysis was conducted on a LDI-quadrupole time-of-flight (QTOF) mass spectrometer. Carbon nanotube surfaces were deposited from suspension using the dried-droplet method. RESULTS The functionalization of the carbon nanotubes was confirmed with Fourier transform infrared (FTIR) spectroscopy. The usefulness of each material was examined with two poly(ethylene glycol) hexadecyl ether amphiphiles (Brij® 52 and Brij® 56) and a poly(ethylene glycol) monomethyl ether as analytes. Generally, the mass spectra obtained with carbon nanotubes covalently functionalized with sinapinic acid as a matrix had peaks with higher intensities than those obtained with carbon nanotubes functionalized by ionic macro-complex formation. CONCLUSIONS The presented new materials based on functionalized carbon nanotubes are effective in the LDI mass analysis of polyether amphiphiles and poly(ethylene glycol) monomethyl ether. This type of assisting surfaces can be highly modified by appropriate functionalization procedures.
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Affiliation(s)
- Michał Cegłowski
- Faculty of Chemistry, Adam Mickiewicz University in Poznan, Umultowska 89b, 61-614, Poznań, Poland.
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Dupré M, Enjalbal C, Cantel S, Martinez J, Megouda N, Hadjersi T, Boukherroub R, Coffinier Y. Investigation of Silicon-Based Nanostructure Morphology and Chemical Termination on Laser Desorption Ionization Mass Spectrometry Performance. Anal Chem 2012; 84:10637-44. [DOI: 10.1021/ac3021104] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Mathieu Dupré
- Institut des Biomolécules
Max Mousseron, UMR 5247, Universités Montpellier 1 et 2, CNRS, Bâtiment Chimie (17), Université
Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Christine Enjalbal
- Institut des Biomolécules
Max Mousseron, UMR 5247, Universités Montpellier 1 et 2, CNRS, Bâtiment Chimie (17), Université
Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Sonia Cantel
- Institut des Biomolécules
Max Mousseron, UMR 5247, Universités Montpellier 1 et 2, CNRS, Bâtiment Chimie (17), Université
Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Jean Martinez
- Institut des Biomolécules
Max Mousseron, UMR 5247, Universités Montpellier 1 et 2, CNRS, Bâtiment Chimie (17), Université
Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Nacéra Megouda
- Institut de Recherche Interdisciplinaire, USR CNRS 3078, Parc de la Haute
Borne, 50 avenue de Halley, BP 70478, 59658 Villeneuve d’Ascq,
France
- Unité de Développement de la Technologie du Silicium, 2 Bd. Frantz Fanon, B.P.
140 Alger-7 merveilles, Alger, Algérie
| | - Toufik Hadjersi
- Unité de Développement de la Technologie du Silicium, 2 Bd. Frantz Fanon, B.P.
140 Alger-7 merveilles, Alger, Algérie
| | - Rabah Boukherroub
- Institut de Recherche Interdisciplinaire, USR CNRS 3078, Parc de la Haute
Borne, 50 avenue de Halley, BP 70478, 59658 Villeneuve d’Ascq,
France
| | - Yannick Coffinier
- Institut de Recherche Interdisciplinaire, USR CNRS 3078, Parc de la Haute
Borne, 50 avenue de Halley, BP 70478, 59658 Villeneuve d’Ascq,
France
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Abstract
Enzymes are key molecules in signal-transduction pathways. However, only a small fraction of more than 500 human kinases, 300 human proteases and 200 human phosphatases is characterised so far. Peptide microarray based technologies for extremely efficient profiling of enzyme substrate specificity emerged in the last years. This technology reduces set-up time for HTS assays and allows the identification of downstream targets. Moreover, peptide microarrays enable optimisation of enzyme substrates. Focus of this review is on assay principles for measuring activities of kinases, phosphatases or proteases and on substrate identification/optimisation for kinases. Additionally, several examples for reliable identification of substrates for lysine methyl-transferases, histone deacetylases and SUMO-transferases are given. Finally, use of high-density peptide microarrays for the simultaneous profiling of kinase activities in complex biological samples like cell lysates or lysates of complete organisms is described. All published examples of peptide arrays used for enzyme profiling are summarised comprehensively.
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Dupré M, Coffinier Y, Boukherroub R, Cantel S, Martinez J, Enjalbal C. Laser desorption ionization mass spectrometry of protein tryptic digests on nanostructured silicon plates. J Proteomics 2012; 75:1973-90. [DOI: 10.1016/j.jprot.2011.12.039] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Revised: 12/19/2011] [Accepted: 12/27/2011] [Indexed: 10/14/2022]
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Coffinier Y, Szunerits S, Drobecq H, Melnyk O, Boukherroub R. Diamond nanowires for highly sensitive matrix-free mass spectrometry analysis of small molecules. NANOSCALE 2012; 4:231-238. [PMID: 22080363 DOI: 10.1039/c1nr11274k] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This paper reports on the use of boron-doped diamond nanowires (BDD NWs) as an inorganic substrate for matrix-free laser desorption/ionization mass spectrometry (LDI-MS) analysis of small molecules. The diamond nanowires are prepared by reactive ion etching (RIE) with oxygen plasma of highly boron-doped (the boron level is 10(19) B cm(-3)) or undoped nanocrystalline diamond substrates. The resulting diamond nanowires are coated with a thin silicon oxide layer that confers a superhydrophilic character to the surface. To minimize droplet spreading, the nanowires were chemically functionalized with octadecyltrichlorosilane (OTS) and then UV/ozone treated to reach a final water contact angle of 120°. The sub-bandgap absorption under UV laser irradiation and the heat confinement inside the nanowires allowed desorption/ionization, most likely via a thermal mechanism, and mass spectrometry analysis of small molecules. A detection limit of 200 zeptomole for verapamil was demonstrated.
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Affiliation(s)
- Yannick Coffinier
- Institut de Recherche Interdisciplinaire (IRI-CNRS-3078), Université Lille1, Parc scientifique de la haute borne, 50 Avenue de Halley, 59658, Villeneuve d'Ascq, France.
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14
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Coffinier Y, Nguyen N, Drobecq H, Melnyk O, Thomy V, Boukherroub R. Affinity surface-assisted laser desorption/ionization mass spectrometry for peptide enrichment. Analyst 2012; 137:5527-32. [DOI: 10.1039/c2an35803d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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15
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Piret G, Kim D, Drobecq H, Coffinier Y, Melnyk O, Schmuki P, Boukherroub R. Surface-assisted laser desorption–ionization mass spectrometry on titanium dioxide (TiO2) nanotube layers. Analyst 2012; 137:3058-63. [DOI: 10.1039/c2an35207a] [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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Seo J, Lee S, Lee J, Lee T. Guided transport of water droplets on superhydrophobic-hydrophilic patterned Si nanowires. ACS APPLIED MATERIALS & INTERFACES 2011; 3:4722-4729. [PMID: 22091585 DOI: 10.1021/am2011756] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We present a facile method to fabricate hydrophilic patterns in superhydrophobic Si nanowire (NW) arrays for guiding water droplets. The superhydrophobic Si NW arrays were obtained by simple dip-coating of dodecyltrichlorosilane (DTS). The water contact angles (CAs) of DTS-coated Si NW arrays drastically increased and saturated at the superhydrophobic regime (water CA ≥ 150°) as the lengths of NWs increased. The demonstrated superhydrophobic surfaces show an extreme water repellent property and small CA hysteresis of less than 7°, which enable the water droplets to easily roll off. The wettability of the DTS-coated Si NW arrays can be converted from superhydrophobic to hydrophilic via UV-enhanced photodecomposition of the DTS, and such wettability conversion was reproducible on the same surfaces by repeating the DTS coating and photodecomposition processes. The resulting water guiding tracks were successfully demonstrated via selective patterning of the hydrophilic region on superhydrophobic Si NW arrays, which could enable water droplets to move along defined trajectories.
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Affiliation(s)
- Jungmok Seo
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Republic of Korea
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Fellahi O, Das MR, Coffinier Y, Szunerits S, Hadjersi T, Maamache M, Boukherroub R. Silicon nanowire arrays-induced graphene oxide reduction under UV irradiation. NANOSCALE 2011; 3:4662-4669. [PMID: 21960142 DOI: 10.1039/c1nr10970g] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This paper reports on efficient UV irradiation-induced reduction of exfoliated graphene oxide. Direct illumination of an aqueous solution of graphene oxide at λ = 312 nm for 6 h resulted in the formation of graphene nanosheets dispersible in water. X-Ray photoelectron spectroscopy (XPS), UV-vis spectroscopy, atomic force microscopy (AFM) and electrochemical measurements (cyclic voltammetry and electrochemical impedance spectroscopy) suggest a restoration of the sp(2) carbon network. The results were compared with graphene nanosheets prepared by photochemical irradiation of a GO aqueous solution in the presence of hydrogenated silicon nanowire (SiNW) arrays or silicon nanowire arrays decorated with silver (SiNW/Ag NPs) or copper nanoparticles (SiNW/Cu NPs). Graphene nanosheets obtained by illumination of the GO aqueous solution at 312 nm for 6 h in the presence of SiNW/Cu NPs exhibited superior electrochemical charge transfer characteristics. This is mainly due to the higher amount of sp(2)-hybridized carbon in these graphene sheets found by XPS analysis. The high level of extended conjugated carbon network was also evident by the water insoluble nature of the resulting graphene nanosheets, which precipitated upon photochemical reduction.
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Affiliation(s)
- Ouarda Fellahi
- Institut de Recherche Interdisciplinaire (USR-3078), Université de Lille1, Parc de la Haute Borne, 50 avenue de Halley, BP 70478, 59658, Villeneuve d'Ascq, France
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Lapierre F, Piret G, Drobecq H, Melnyk O, Coffinier Y, Thomy V, Boukherroub R. High sensitive matrix-free mass spectrometry analysis of peptides using silicon nanowires-based digital microfluidic device. LAB ON A CHIP 2011; 11:1620-1628. [PMID: 21423926 DOI: 10.1039/c0lc00716a] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We present for the first time an electrowetting on dielectric (EWOD) microfluidic system coupled to a surface-assisted laser desorption-ionization (SALDI) silicon nanowire-based interface for mass spectrometry (MS) analysis of small biomolecules. Here, the transfer of analytes has been achieved on specific locations on the SALDI interface followed by their subsequent mass spectrometry analysis without the use of an organic matrix. To achieve this purpose, a device comprising a digital microfluidic system and a patterned superhydrophobic/superhydrophilic silicon nanowire interface was developed. The digital microfluidic system serves for the displacement of the droplets containing analytes, via an electrowetting actuation, inside the superhydrophilic patterns. The nanostructured silicon interface acts as an inorganic target for matrix-free laser desorption-ionization mass spectrometry analysis of the dried analytes. The proposed device can be easily used to realize several basic operations of a Lab-on-Chip such as analyte displacement and rinsing prior to MS analysis. We have demonstrated that the analysis of low molecular weight compounds (700 m/z) can be achieved with a very high sensitivity (down to 10 fmol μL(-1)).
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