1
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Huang J, Qiu Y, Lücke F, Su J, Grundmeier G, Keller A. Multiprotein Adsorption from Human Serum at Gold and Oxidized Iron Surfaces Studied by Atomic Force Microscopy and Polarization-Modulation Infrared Reflection Absorption Spectroscopy. Molecules 2023; 28:6060. [PMID: 37630312 PMCID: PMC10459451 DOI: 10.3390/molecules28166060] [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: 07/20/2023] [Revised: 08/08/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023] Open
Abstract
Multiprotein adsorption from complex body fluids represents a highly important and complicated phenomenon in medicine. In this work, multiprotein adsorption from diluted human serum at gold and oxidized iron surfaces is investigated at different serum concentrations and pH values. Adsorption-induced changes in surface topography and the total amount of adsorbed proteins are quantified by atomic force microscopy (AFM) and polarization-modulation infrared reflection absorption spectroscopy (PM-IRRAS), respectively. For both surfaces, stronger protein adsorption is observed at pH 6 compared to pH 7 and pH 8. PM-IRRAS furthermore provides some qualitative insights into the pH-dependent alterations in the composition of the adsorbed multiprotein films. Changes in the amide II/amide I band area ratio and in particular side-chain IR absorption suggest that the increased adsorption at pH 6 is accompanied by a change in protein film composition. Presumably, this is mostly driven by the adsorption of human serum albumin, which at pH 6 adsorbs more readily and thereby replaces other proteins with lower surface affinities in the resulting multiprotein film.
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Affiliation(s)
| | | | | | | | | | - Adrian Keller
- Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, 33098 Paderborn, Germany; (J.H.); (Y.Q.); (F.L.); (J.S.); (G.G.)
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2
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Self-assembly strategy to reduce non-specific adsorption for the development of high sensitivity quantitative immunoassay. Anal Chim Acta 2022; 1229:340367. [PMID: 36156225 DOI: 10.1016/j.aca.2022.340367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 08/26/2022] [Accepted: 09/05/2022] [Indexed: 11/23/2022]
Abstract
The development of functionalized surfaces with low non-specific adsorption is important for their biomedical applications. To inhibit non-specific adsorption on glass substrate, we designed a novel optical biochip by modifying a layer of dense negatively charged film (SO32-) on its substrate surface via self-assembly. Compared with the untreated glass substrate, it reduced the adsorption by about 300-fold or 400-fold by poly (styrene sulfonic acid) sodium salt (PSS), or meso-tetra (4-sulfonatophenyl) porphine dihydrochloride (TSPP) on individually the modified glass substrate. Considering the effect of fluorescence resonance energy transfer (FRET) between TSPP and the QDs in solution by mixing, a strategy of 2-layer of TSPP followed by 4-layer of PSS was designed to modify the glass for preparing biochips. Under the optimized conditions, the biochip on functionalized glass substrate co-treated with TSPP and PSS realized the sensitive quantitative detection of C-reactive protein (CRP) based on a quantum dot fluorescence immunosorbent assay (QD-FLISA). The limit of detection (LOD) for CRP achieved 0.69 ng/mL with the range of 1-1,000 ng/mL using TSPP and PSS co-treated glass substrate surface, which was respectively about 1.9-fold and 7.5-fold more sensitive to the PSS-modified biochip and the TSPP-modified biochip. This work demonstrated an effective and convenient strategy to obtain biochips with low non-specific adsorption properties on functionalized surfaces, thus providing a new approach for creating ultra-high sensitivity microchannels or microarrays on glass substrates.
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3
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Liu R, Wu Q, Huang X, Zhao X, Chen X, Chen Y, Weitz DA, Song Y. Synthesis of nanomedicine hydrogel microcapsules by droplet microfluidic process and their pH and temperature dependent release. RSC Adv 2021; 11:37814-37823. [PMID: 35498106 PMCID: PMC9043787 DOI: 10.1039/d1ra05207a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 11/04/2021] [Indexed: 12/18/2022] Open
Abstract
Chitosan and alginate hydrogels are attractive because they are highly biocompatible and suitable for developing nanomedicine microcapsules. Here we fabricated a polydimethylsiloxane-based droplet microfluidic reactor to synthesize nanomedicine hydrogel microcapsules using Au@CoFeB-Rg3 as a nanomedicine model and a mixture of sodium alginate and PEG-g-chitosan crosslinked by genipin as a hydrogel model. The release kinetics of nanomedicines from the hydrogel were evaluated by simulating the pH and temperature of the digestive tract during drug transport and those of the target pathological cell microenvironment. Their pH and temperature-dependent release kinetics were studied by measuring the mass loss of small pieces of thin films formed by the nanomedicine-encapsulating hydrogels in buffers of pH 1.2, 7.4, and 5.5, which replicate the pH of the stomach, gut and blood, and cancer microenvironment, respectively, at 20 °C and 37 °C, corresponding to the storage temperature of hydrogels before use and normal body temperature. Interestingly, nanomedicine-encapsulating hydrogels can undergo rapid decomposition at pH 5.5 and are relatively stable at pH 7.4 at 37 °C, which are desirable qualities for drug delivery, controlled release, and residue elimination after achieving target effects. These results indicate that the designed nanomedicine hydrogel microcapsule system is suitable for oral administration.
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Affiliation(s)
- Ran Liu
- Center for Modern Physics Technology, School of Mathematics and Physics, University of Science and Technology Beijing Beijing 100083 China
- Zhejiang Key Laboratory for Pulsed Power Translational Medicine Hangzhou 310000 China
| | - Qiong Wu
- Center for Modern Physics Technology, School of Mathematics and Physics, University of Science and Technology Beijing Beijing 100083 China
- Zhejiang Key Laboratory for Pulsed Power Translational Medicine Hangzhou 310000 China
| | - Xing Huang
- Physics Department, School of Engineering and Applied Science, Harvard University Cambridge MA 02138 USA
| | - Xiaoxiong Zhao
- Center for Modern Physics Technology, School of Mathematics and Physics, University of Science and Technology Beijing Beijing 100083 China
- Zhejiang Key Laboratory for Pulsed Power Translational Medicine Hangzhou 310000 China
| | - Xinhua Chen
- Zhejiang Key Laboratory for Pulsed Power Translational Medicine Hangzhou 310000 China
| | - Yonggang Chen
- Zhejiang Key Laboratory for Pulsed Power Translational Medicine Hangzhou 310000 China
| | - David A Weitz
- Physics Department, School of Engineering and Applied Science, Harvard University Cambridge MA 02138 USA
| | - Yujun Song
- Center for Modern Physics Technology, School of Mathematics and Physics, University of Science and Technology Beijing Beijing 100083 China
- Zhejiang Key Laboratory for Pulsed Power Translational Medicine Hangzhou 310000 China
- Physics Department, School of Engineering and Applied Science, Harvard University Cambridge MA 02138 USA
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4
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De Dios Andres P, Ramos-Docampo MA, Qian X, Stingaciu M, Städler B. Locomotion of micromotors in paper chips. NANOSCALE 2021; 13:17900-17911. [PMID: 34679159 DOI: 10.1039/d1nr06221b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Locomotion of nano/micromotors in non-aqueous environments remains a challenging task. We assembled magnetic micromotors with different surface coatings and explored their locomotion in paper chips. Poly(L-lysine) deposition resulted in positively charged micromotors. Immobilized cellulase was used to increase the micromotors' paper penetration depth while a polyethylene glycol (PEG) coating was employed to limit the interaction between the micromotors and the cellulose fibers. All micromotors were able to move in the top layers of the paper chips with velocities dependent on the magnetic forces used to induce their locomotion, their sizes and the types of employed paper chips. Maximum speeds of up to ∼25 μm s-1 were observed for PEGylated micromotors in the fibrous cellulose environment. This type of micromotors has the potential to be considered in the area of paper microfluidics to facilitate distribution, or collection of moieties for biosensing or cell culture.
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Affiliation(s)
- Paula De Dios Andres
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus, Denmark.
| | - Miguel A Ramos-Docampo
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus, Denmark.
| | - Xiaomin Qian
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus, Denmark.
| | - Marian Stingaciu
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus, Denmark
| | - Brigitte Städler
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus, Denmark.
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5
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Lin YT, Vermaas R, Yan J, de Jong AM, Prins MW. Click-Coupling to Electrostatically Grafted Polymers Greatly Improves the Stability of a Continuous Monitoring Sensor with Single-Molecule Resolution. ACS Sens 2021; 6:1980-1986. [PMID: 33985333 PMCID: PMC8165697 DOI: 10.1021/acssensors.1c00564] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
![]()
Sensing technologies
for the real-time monitoring of biomolecules
will allow studies of dynamic changes in biological systems and the
development of control strategies based on measured responses. Here,
we describe a molecular architecture and coupling process that allow
continuous measurements of low-concentration biomolecules over long
durations in a sensing technology with single-molecule resolution.
The sensor is based on measuring temporal changes of the motion of
particles upon binding and unbinding of analyte molecules. The biofunctionalization
involves covalent coupling by click chemistry to PLL-g-PEG bottlebrush polymers. The polymer is grafted to a surface by
multivalent electrostatic interactions, while the poly(ethylene glycol)
suppresses nonspecific binding of biomolecules. With this biofunctionalization
strategy, we demonstrate the continuous monitoring of single-stranded
DNA and a medically relevant small-molecule analyte (creatinine),
in sandwich and competitive assays, in buffer and in filtered blood
plasma, with picomolar, nanomolar, and micromolar analyte concentrations,
and with continuous sensor operation over 10 h.
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Affiliation(s)
- Yu-Ting Lin
- Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Rosan Vermaas
- Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Junhong Yan
- Helia BioMonitoring, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Arthur M. de Jong
- Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Menno W.J. Prins
- Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- Helia BioMonitoring, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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6
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Xu B, Feng C, Lv Y, Lin S, Lu G, Huang X. Biomimetic Asymmetric Polymer Brush Coatings Bearing Fencelike Conformation Exhibit Superior Protection and Antifouling Performance. ACS APPLIED MATERIALS & INTERFACES 2020; 12:1588-1596. [PMID: 31840506 DOI: 10.1021/acsami.9b19230] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Antifouling surfaces with optimized conformation and compositional heterogeneities are presented with the goal of improving the efficacy of surface protection. The approach exploits the adhesive group (thiol or catechol chain end) to anchor asymmetric polymer brushes (APBs) bearing amphiphilic side chains with synergistic nonfouling and fouling-release abilities onto the surface. The conformation of the APB surface is close to the fencelike structure, which mimics lubricating protein lubricin, endowing the surface with capacity of enhanced protection and antiadhesivity, even facing the high compression of fouling. By utilizing a poly(Br-acrylate-alkyne) macroagent comprising alkynyl and 2-bromopropionate groups, we prepared a series of APB surfaces based on polyacrylate-g-poly(ethylene oxide)/poly(pentafluorophenyl methacrylate) (PA-g-PEO/PPFMA) APBs to explore the influence of the content of the fluorinated segment and bioinspired topological polymer chemistry on their antifouling performance. The APB surfaces can not only provide compositional heterogeneities of PEO and fluorinated segments in each side chain but also give a high surface coverage because of the characteristic of high grafting density of macromolecular brushes. It was found for the first time, as far as we are aware, the fencelike APB surface shows excellent antifouling performance with less protein adsorption (up to 91% off) and cell adhesion (up to 84% off) in comparison with the controlled substrate under relatively long incubation time.
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Affiliation(s)
- Binbin Xu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , People's Republic of China
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering , East China University of Science and Technology , 130 Meilong Road , Shanghai 200237 , People's Republic of China
| | - Chun Feng
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , People's Republic of China
| | - Yisheng Lv
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering , East China University of Science and Technology , 130 Meilong Road , Shanghai 200237 , People's Republic of China
| | - Shaoliang Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering , East China University of Science and Technology , 130 Meilong Road , Shanghai 200237 , People's Republic of China
| | - Guolin Lu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , People's Republic of China
| | - Xiaoyu Huang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , People's Republic of China
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7
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Yang C, Yin M, Xu G, Lin W, Chen J, Zhang Y, Feng T, Huang P, Chen C, Yong K. Biodegradable Polymers as a Noncoding miRNA Nanocarrier for Multiple Targeting Therapy of Human Hepatocellular Carcinoma. Adv Healthc Mater 2019; 8:e1801318. [PMID: 30829008 DOI: 10.1002/adhm.201801318] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 01/26/2019] [Indexed: 12/21/2022]
Abstract
Therapeutic strategy based on the restoration of tumor suppressor-microRNAs (miRNAs) is a promising approach for cancer therapy, but the low delivery efficiency of miRNA remains a huge hurdle due to the lack of safe and efficient nonviral carriers. In this work, with the use of newly developed PEGylated biodegradable charged polyester-based vectors (PEG-BCPVs) as the carrier, the miR26a and miR122 codelivering therapeutic strategy (PEG-BCPVs/miR26a/miR122 as the delivery formulation) is successfully developed for efficient treatment of human hepatocellular carcinoma (HCC). In vitro study results show that PEG-BCPVs are capable of effectively facilitating miRNA cellular uptake via a cell endocytosis pathway. Consequently, the restoration of miR26a and miR122 remarkably inhibit the cell growth, migration, invasion, colony formation, and induced apoptosis of HepG2 cells. More importantly, the chemosensitivity of HepG2 to anticancer drug is also considerably enhanced. After treatment with the PEG-BCPV-based miRNA delivery system, the expression of the multiple targeted genes corresponding to miR26a and miR122 in HepG2 cells is greatly downregulated. Accordingly, the newly developed miRNA restoration therapeutic strategy via biodegradable PEG-BCPVs as the carrier should be a promising modality for combating HCC.
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Affiliation(s)
- Chengbin Yang
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound ImagingSchool of Biomedical EngineeringHealth Science CenterShenzhen University Shenzhen 518060 China
| | - Mingjie Yin
- School of Electrical and Electronic EngineeringNanyang Technological University Singapore 639798 Singapore
| | - Gaixia Xu
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound ImagingSchool of Biomedical EngineeringHealth Science CenterShenzhen University Shenzhen 518060 China
| | - Wei‐Jen Lin
- Department of Fiber and Composite MaterialsFeng Chia University Taichung 40724 Republic of China, Taiwan
| | - Jiajie Chen
- School of MedicineHealth Science CenterShenzhen University Shenzhen 518060 China
| | - Yinling Zhang
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound ImagingSchool of Biomedical EngineeringHealth Science CenterShenzhen University Shenzhen 518060 China
| | - Tao Feng
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound ImagingSchool of Biomedical EngineeringHealth Science CenterShenzhen University Shenzhen 518060 China
| | - Peng Huang
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound ImagingSchool of Biomedical EngineeringHealth Science CenterShenzhen University Shenzhen 518060 China
| | - Chih‐Kuang Chen
- Department of Chemical and Materials EngineeringNational Yunlin University of Science and Technology Yunlin 64002 Republic of China, Taiwan
| | - Ken‐Tye Yong
- School of Electrical and Electronic EngineeringNanyang Technological University Singapore 639798 Singapore
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8
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Wang P, Xu X, Wang Y, Zhou B, Qu J, Li J, Shen M, Xia J, Shi X. Zwitterionic Polydopamine-Coated Manganese Oxide Nanoparticles with Ultrahigh Longitudinal Relaxivity for Tumor-Targeted MR Imaging. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4336-4341. [PMID: 30813726 DOI: 10.1021/acs.langmuir.9b00013] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We present the design of antifouling zwitterion-functionalized manganese oxide (Mn3O4) nanoparticles (NPs) modified with folic acid (FA) for targeted tumor magnetic resonance (MR) imaging. In the current work, diethylene glycol-stabilized Mn3O4 NPs were initially prepared via a solvothermal approach, coated with polydopamine (PDA), fluorescently labeled with rhodamine B, conjugated with FA via amide bond formation, and finally covered with zwitterions of l-lysine (Lys). The thus-generated multifunctional Mn3O4 NPs display excellent water dispersibility and colloidal stability, good protein resistance ability, and desirable cytocompatibility. With the PDA and Lys modifications, the multifunctional Mn3O4 NPs own an ultrahigh r1 relaxivity (89.30 mM-1 s-1) and enable targeted tumor MR imaging, owing to the linked FA ligands. The designed antifouling zwitterion-functionalized Mn3O4 NPs may be employed as an excellent MR contrast agent for targeted MR imaging of other biological systems.
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Affiliation(s)
- Peng Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
| | - Xiaoying Xu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
| | - Yue Wang
- Department of Radiology , Shanghai Songjiang District Central Hospital , Shanghai 201600 , People's Republic of China
| | - Benqing Zhou
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
| | - Jiao Qu
- Department of Radiology , Shanghai Songjiang District Central Hospital , Shanghai 201600 , People's Republic of China
| | - Jin Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
| | - Mingwu Shen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
| | - Jindong Xia
- Department of Radiology , Shanghai Songjiang District Central Hospital , Shanghai 201600 , People's Republic of China
| | - Xiangyang Shi
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
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9
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Fontes CM, Achar RK, Joh DY, Ozer I, Bhattacharjee S, Hucknall A, Chilkoti A. Engineering the Surface Properties of a Zwitterionic Polymer Brush to Enable the Simple Fabrication of Inkjet-Printed Point-of-Care Immunoassays. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:1379-1390. [PMID: 30086642 PMCID: PMC6825806 DOI: 10.1021/acs.langmuir.8b01597] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Motivated by the lack of adventitious protein adsorption on zwitterionic polymer brushes that promise low noise and hence high analytical sensitivity for surface-based immunoassays, we explored their use as a substrate for immunoassay fabrication by the inkjet printing of antibodies. We observed that a poly(sulfobetaine)methacrylate brush on glass is far too hydrophilic to enable the noncovalent immobilization of antibodies by inkjet printing. To circumvent this limitation, we developed a series of hybrid zwitterionic-cationic surface coatings with tunable surface wettability that are suitable for the inkjet printing of antibodies but also have low protein adsorption. We show that in a microarray format in which both the capture and detection antibodies are discretely printed as spots on these hybrid brushes, a point-of-care sandwich immunoassay can be carried out with an analytical sensitivity and dynamic range that is similar to or better than those of the same assay fabricated on a PEG-like brush. We also show that the hybrid polymer brushes do not bind anti-PEG antibodies that are ubiquitous in human blood, which can be a problem with immunoassays fabricated on PEG-like coatings.
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Affiliation(s)
- Cassio M. Fontes
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham NC 27708 USA
| | - Rohan K. Achar
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham NC 27708 USA
| | - Daniel Y. Joh
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham NC 27708 USA
| | - Imran Ozer
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham NC 27708 USA
| | - Somnath Bhattacharjee
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham NC 27708 USA
| | - Angus Hucknall
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham NC 27708 USA
| | - Ashutosh Chilkoti
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham NC 27708 USA
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10
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Szekacs I, Farkas E, Gemes BL, Takacs E, Szekacs A, Horvath R. Integrin targeting of glyphosate and its cell adhesion modulation effects on osteoblastic MC3T3-E1 cells revealed by label-free optical biosensing. Sci Rep 2018; 8:17401. [PMID: 30479368 PMCID: PMC6258691 DOI: 10.1038/s41598-018-36081-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 10/26/2018] [Indexed: 12/14/2022] Open
Abstract
This study is a discovery of interesting and far reaching properties of the world leading herbicide active ingredient glyphosate. Here we demonstrate the cell adhesion-modifying characteristics of glyphosate affecting cellular interactions via Arg-Gly-Asp (RGD)-dependent integrins. This conclusion was supported by the observations that a glyphosate surface coating induced integrin-specific cell adhesion, while glyphosate in solution inhibited cell adhesion on an RGD-displaying surface. A sensitive, real-time, label-free, whole cell approach was used to monitor the cell adhesion kinetic processes with excellent data quality. The half maximal inhibitory concentration (IC50) for glyphosate was determined to be 0.47 ± 0.07% (20.6 mM) in serum-free conditions. A three-dimensional dissociation constant of 0.352 mM was calculated for the binding between RGD-specific integrins in intact MC3T3-E1 cells and soluble glyphosate by measuring its competition for RGD-motifs binding, while the affinity of those RGD-specific integrins to the RGD-motifs was 5.97 µM. The integrin-targeted affinity of glyphosate was proven using competitive binding assays to recombinant receptor αvβ3. The present study shows not only ligand-binding properties of glyphosate, but also illustrates its remarkable biomimetic power in the case of cell adhesion.
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Affiliation(s)
- Inna Szekacs
- Nanobiosensorics Momentum Group, Institute of Technical Physics and Materials Science, Centre for Energy Research, Hungarian Academy of Sciences, Konkoly-Thege M. út 29-33, H-1120, Budapest, Hungary
| | - Eniko Farkas
- Nanobiosensorics Momentum Group, Institute of Technical Physics and Materials Science, Centre for Energy Research, Hungarian Academy of Sciences, Konkoly-Thege M. út 29-33, H-1120, Budapest, Hungary
- Subdoctoral School of Molecular and Nanotechnologies, Chemical Engineering and Material Science Doctoral School, University of Pannonia, Egyetem u.10, H-8200, Veszprém, Hungary
| | - Borbala Leticia Gemes
- Agro-Environmental Research Institute, National Agricultural Research and Innovation Centre, Herman Ottó u. 15, H-1022, Budapest, Hungary
| | - Eszter Takacs
- Agro-Environmental Research Institute, National Agricultural Research and Innovation Centre, Herman Ottó u. 15, H-1022, Budapest, Hungary
| | - Andras Szekacs
- Agro-Environmental Research Institute, National Agricultural Research and Innovation Centre, Herman Ottó u. 15, H-1022, Budapest, Hungary.
| | - Robert Horvath
- Nanobiosensorics Momentum Group, Institute of Technical Physics and Materials Science, Centre for Energy Research, Hungarian Academy of Sciences, Konkoly-Thege M. út 29-33, H-1120, Budapest, Hungary.
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11
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Yuran S, Dolid A, Reches M. Resisting Bacteria and Attracting Cells: Spontaneous Formation of a Bifunctional Peptide-Based Coating by On-Surface Assembly Approach. ACS Biomater Sci Eng 2018; 4:4051-4061. [PMID: 33418805 DOI: 10.1021/acsbiomaterials.8b00885] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Due to extension of life expectancy, millions of people suffer nowadays from bone and dental malfunctions that can only be treated by different types of implants. However, these implants tend to fail due to bacterial infection and lack of integration with the remaining tissue. Here, we demonstrate a new concept in which we use specifically designed peptides, in a "Lego-like" manner to endow multiple preprogrammed functions. We developed a bifunctional peptide-based coating that simultaneously rejects the adhesion of infecting bacteria and attracts cells that build the new connecting tissue. The peptide design contains fluorinated phenylalanine that mediates the self-assembly of the peptide into a coating that resists bacterial adhesion. It also includes an Arg-Gly-Asp (RGD) motif that attracts mammalian cells. The whole compound is attached to the surface using a third unit, the amino acid 3,4-dihydroxyphenylalanine (DOPA). This novel, yet very simple approach is significantly advantageous for practical use and synthesis. More importantly, this peptide design can serve as a general platform for generating functional coatings.
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Affiliation(s)
- Sivan Yuran
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, 91904, Jerusalem, Israel
| | - Alona Dolid
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, 91904, Jerusalem, Israel
| | - Meital Reches
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, 91904, Jerusalem, Israel
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12
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Cui X, Murakami T, Tamura Y, Aoki K, Hoshino Y, Miura Y. Bacterial Inhibition and Osteoblast Adhesion on Ti Alloy Surfaces Modified by Poly(PEGMA- r-Phosmer) Coating. ACS APPLIED MATERIALS & INTERFACES 2018; 10:23674-23681. [PMID: 29944334 DOI: 10.1021/acsami.8b07757] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We have synthesized and immobilized PEGMA500-Phosmer to Ti6Al4V surfaces by a simple procedure to reduce bacteria-associated infection without degrading the cell response. Adhered bacteria coverage was lessened to 1% on polymer-coated surfaces when exposed to Escherichia coli, Staphylococcus epidermidis, and Streptococcus mutans. Moreover, PEGMA500-Phosmer and homoPhosmer coatings presented better responses to MC3T3-E1 preosteoblast cells when compared with the results for PEGMA2000-Phosmer-coated and raw Ti alloy surfaces. The behavior of balancing bacterial inhibition and cell attraction of the PEGMA500-Phosmer coating was explained by the grafted phosphate groups, with an appropriate PEG brush length facilitating greater levels of calcium deposition and further fibronectin adsorption when compared with that of the raw Ti alloy surface.
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Affiliation(s)
- Xinnan Cui
- Department of Chemical Engineering, Graduate School of Engineering , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
| | - Tatsuya Murakami
- Center for Nano Materials and Technology , Japan Advanced Institute of Science and Technology , 1-1 Asahidai , Nomi , Ishikawa 923-1292 , Japan
| | | | | | - Yu Hoshino
- Department of Chemical Engineering, Graduate School of Engineering , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
| | - Yoshiko Miura
- Department of Chemical Engineering, Graduate School of Engineering , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
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13
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Pop-Georgievski O, Zimmermann R, Kotelnikov I, Proks V, Romeis D, Kučka J, Caspari A, Rypáček F, Werner C. Impact of Bioactive Peptide Motifs on Molecular Structure, Charging, and Nonfouling Properties of Poly(ethylene oxide) Brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6010-6020. [PMID: 29728048 DOI: 10.1021/acs.langmuir.8b00441] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Polymer layers capable of suppressing protein adsorption from biological media while presenting extracellular matrix-derived peptide motifs offer valuable new options for biomimetic surface engineering. Herein, we provide detailed insights into physicochemical changes induced in a nonfouling poly(ethylene oxide) (PEO) brush/polydopamine (PDA) system by incorporation of adhesion ligand (RGD) peptides. Brushes with high surface chain densities (σ ≥ 0.5 chains·nm-2) and pronounced hydrophilicity (water contact angles ≤ 10°) were prepared by end-tethering of heterobifunctional PEOs ( Mn ≈ 20 000 g·mol-1) to PDA-modified surfaces from a reactive melt. Using alkyne distal end group on the PEO chains, azidopentanoic-bearing peptides were coupled through a copper-catalyzed Huisgen azide-alkyne "click" cycloaddition reaction. The surface concentration of RGD was tuned from complete saturation of the PEO surface with peptides (1.7 × 105 fmol·cm-2) to values which may induce distinct differences in cell adhesion (<6.0 × 102 fmol·cm-2). Infrared reflection-absorption and X-ray photoelectron spectroscopies proved the PDA-PEO layers covalent structure and the immobilization of RGD peptides. The complete reconstruction of experimental electrohydrodynamics data utilizing mean-field theory predictions further verified the attained brush structure of the end-tethered PEO chains which provided hydrodynamic screening of the PDA anchor. Increasing the surface concentration of immobilized RGD peptides led to increased interfacial charging. Supported by simulations, this observation was attributed to the ionization of functional groups in the amino acid sequence and to the pH-dependent adsorption of water ions (OH- > H3O+) from the electrolyte. Despite the distinct differences observed in the electrokinetic analysis of the surfaces bearing different amounts of RGD, it was found that the peptide presence on PEO(20 000)-PDA layers does not have a significant effect on the nonfouling properties of the system. Notably, the presented PEO(20 000)-PDA layers bearing RGD peptides in the surface concentration range 5.9 to 1.7 × 105 fmol·cm-2 reduced the protein adsorption from fetal bovine serum to less than 30 ng·cm-2, that is, values comparable to the ones obtained for pristine PEO(20 000)-PDA layers.
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Affiliation(s)
- Ognen Pop-Georgievski
- Institute of Macromolecular Chemistry , Czech Academy of Sciences , Heyrovskeho nam. 2 , 162 06 Prague 6 , Czech Republic
| | - Ralf Zimmermann
- Max Bergmann Center of Biomaterials Dresden , Leibniz Institute of Polymer Research Dresden , Hohe Str. 6 , 01069 Dresden , Germany
| | - Ilya Kotelnikov
- Institute of Macromolecular Chemistry , Czech Academy of Sciences , Heyrovskeho nam. 2 , 162 06 Prague 6 , Czech Republic
| | - Vladimir Proks
- Institute of Macromolecular Chemistry , Czech Academy of Sciences , Heyrovskeho nam. 2 , 162 06 Prague 6 , Czech Republic
| | - Dirk Romeis
- Max Bergmann Center of Biomaterials Dresden , Leibniz Institute of Polymer Research Dresden , Hohe Str. 6 , 01069 Dresden , Germany
| | - Jan Kučka
- Institute of Macromolecular Chemistry , Czech Academy of Sciences , Heyrovskeho nam. 2 , 162 06 Prague 6 , Czech Republic
| | - Anja Caspari
- Max Bergmann Center of Biomaterials Dresden , Leibniz Institute of Polymer Research Dresden , Hohe Str. 6 , 01069 Dresden , Germany
| | - František Rypáček
- Institute of Macromolecular Chemistry , Czech Academy of Sciences , Heyrovskeho nam. 2 , 162 06 Prague 6 , Czech Republic
| | - Carsten Werner
- Max Bergmann Center of Biomaterials Dresden , Leibniz Institute of Polymer Research Dresden , Hohe Str. 6 , 01069 Dresden , Germany
- Center of Regenerative Therapies Dresden , Technische Universität Dresden , Tatzberg 47 , 01167 Dresden , Germany
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14
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Morgese G, Ramakrishna SN, Simic R, Zenobi-Wong M, Benetti EM. Hairy and Slippery Polyoxazoline-Based Copolymers on Model and Cartilage Surfaces. Biomacromolecules 2018; 19:680-690. [DOI: 10.1021/acs.biomac.7b01828] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Giulia Morgese
- Polymer
Surfaces Group, Laboratory for Surface Science and Technology, Department
of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland
- Cartilage
Engineering and Regeneration Laboratory, Department of Health Sciences
and Technology, ETH Zürich, Otto-Stern-Weg 7, CH-8093 Zürich, Switzerland
| | - Shivaprakash N. Ramakrishna
- Polymer
Surfaces Group, Laboratory for Surface Science and Technology, Department
of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland
| | - Rok Simic
- Polymer
Surfaces Group, Laboratory for Surface Science and Technology, Department
of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland
| | - Marcy Zenobi-Wong
- Cartilage
Engineering and Regeneration Laboratory, Department of Health Sciences
and Technology, ETH Zürich, Otto-Stern-Weg 7, CH-8093 Zürich, Switzerland
| | - Edmondo M. Benetti
- Polymer
Surfaces Group, Laboratory for Surface Science and Technology, Department
of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland
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15
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He T, Jańczewski D, Guo S, Man SM, Jiang S, Tan WS. Stable pH responsive layer-by-layer assemblies of partially hydrolysed poly(2-ethyl-2-oxazoline) and poly(acrylic acid) for effective prevention of protein, cell and bacteria surface attachment. Colloids Surf B Biointerfaces 2018; 161:269-278. [DOI: 10.1016/j.colsurfb.2017.10.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 09/05/2017] [Accepted: 10/10/2017] [Indexed: 12/21/2022]
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16
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Tachizawa S, Takahashi H, Kim YJ, Odawara A, Pauty J, Ikeuchi Y, Suzuki I, Kikuchi A, Matsunaga YT. Bundle Gel Fibers with a Tunable Microenvironment for in Vitro Neuron Cell Guiding. ACS APPLIED MATERIALS & INTERFACES 2017; 9:43250-43257. [PMID: 29086563 DOI: 10.1021/acsami.7b14585] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
As scaffolds for neuron cell guiding in vitro, gel fibers with a bundle structure, comprising multiple microfibrils, were fabricated using a microfluidic device system by casting a phase-separating polymer blend solution comprising hydroxypropyl cellulose (HPC) and sodium alginate (Na-Alg). The topology and stiffness of the obtained bundle gel fibers depended on their microstructure derived by the polymer blend ratio of HPC and Na-Alg. High concentrations of Na-Alg led to the formation of small microfibrils in a one-bundle gel fiber and stiff characteristics. These bundle gel fibers permitted for the elongation of the neuron cells along their axon orientation with the long axis of fibers. In addition, human-induced pluripotent-stem-cell-derived dopaminergic neuron progenitor cells were differentiated into neuronal cells on the bundle gels. The bundle gel fibers demonstrated an enormous potential as cell culture scaffold materials with an optimal microenvironment for guiding neuron cells.
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Affiliation(s)
- Sayaka Tachizawa
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
- Department of Materials Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science , 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Haruko Takahashi
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Young-Jin Kim
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Aoi Odawara
- Department of Electronics, Graduate School of Engineering, Tohoku Institute of Technology , 35-1 Yagiyama, Kasumicho, Taihaku-ku, Sendai, Miyagi 982-8577, Japan
- Research Institute of Electrical Communication, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Joris Pauty
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
- LIMMS/CNRS-IIS UMI 2820; SMMiL-E project, Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Yoshiho Ikeuchi
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Ikuro Suzuki
- Department of Electronics, Graduate School of Engineering, Tohoku Institute of Technology , 35-1 Yagiyama, Kasumicho, Taihaku-ku, Sendai, Miyagi 982-8577, Japan
| | - Akihiko Kikuchi
- Department of Materials Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science , 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Yukiko T Matsunaga
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
- LIMMS/CNRS-IIS UMI 2820; SMMiL-E project, Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
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17
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Biofunctional polyethylene glycol coatings on titanium: An in vitro -based comparison of functionalization methods. Colloids Surf B Biointerfaces 2017; 152:367-375. [DOI: 10.1016/j.colsurfb.2017.01.042] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 01/20/2017] [Accepted: 01/23/2017] [Indexed: 01/25/2023]
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18
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Yang T, Xu L, Li B, Li W, Ma X, Fan L, Lee RJ, Xu C, Xiang G. Antitumor activity of a folate receptor-targeted immunoglobulin G-doxorubicin conjugate. Int J Nanomedicine 2017; 12:2505-2515. [PMID: 28408821 PMCID: PMC5383082 DOI: 10.2147/ijn.s125591] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Development of antibody-drug conjugates (ADCs) is a promising therapeutic strategy for cancer therapy. In this study, folate was conjugated via a polyethyleneglycol (PEG) linker to immunoglobulin G (IgG), which was linked to doxorubicin (DOX), to form a novel ADC folate-PEG-IgG-DOX (FA-PEG-IgG-DOX). The FA-PEG-IgG-DOX showed high targeting efficiency in HeLa and KB cells and significantly improved the uptake and retention of DOX compared with IgG-DOX about 10-fold. Subsequently, FA-PEG-IgG-DOX was shown to have at least 8 times higher antitumor activity than IgG-DOX both in HeLa and KB cells and also induced more apoptosis in those cells than IgG-DOX. Moreover, FA-PEG-IgG-DOX had a 2 times longer circulating time than FA-IgG-DOX, but did not increase the DOX distribution in mouse hearts. Importantly, FA-PEG-IgG-DOX treatment significantly inhibited tumor growth in xenograft mice. Together, our results indicate that FA-PEG-IgG is an effective ADC carrier for delivery of chemotherapeutic agents and that conjugating tumor targeting ligands to antibodies is a promising strategy for producing ADC drugs.
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Affiliation(s)
- Tan Yang
- Department of Biopharmaceuticals, School of Pharmacy
| | - Ling Xu
- Department of Biopharmaceuticals, School of Pharmacy
| | - Bin Li
- Department of Biopharmaceuticals, School of Pharmacy
| | - Weijie Li
- Department of Biopharmaceuticals, School of Pharmacy
| | - Xiang Ma
- Department of Biopharmaceuticals, School of Pharmacy
| | - Lingling Fan
- Stem Cell Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Robert J Lee
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, OH, USA
| | - Chuanrui Xu
- Department of Biopharmaceuticals, School of Pharmacy
| | - Guangya Xiang
- Department of Biopharmaceuticals, School of Pharmacy
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19
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20
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Bobály B, Sipkó E, Fekete J. Challenges in liquid chromatographic characterization of proteins. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1032:3-22. [DOI: 10.1016/j.jchromb.2016.04.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 04/07/2016] [Accepted: 04/22/2016] [Indexed: 01/11/2023]
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21
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Ohta T, Hashida Y, Yamashita F, Hashida M. Development of Novel Drug and Gene Delivery Carriers Composed of Single-Walled Carbon Nanotubes and Designed Peptides With PEGylation. J Pharm Sci 2016; 105:2815-2824. [DOI: 10.1016/j.xphs.2016.03.031] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 03/01/2016] [Accepted: 03/22/2016] [Indexed: 11/30/2022]
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22
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Rapid Assay to Assess Bacterial Adhesion on Textiles. MATERIALS 2016; 9:ma9040249. [PMID: 28773373 PMCID: PMC5502901 DOI: 10.3390/ma9040249] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 03/16/2016] [Accepted: 03/22/2016] [Indexed: 11/22/2022]
Abstract
Textiles are frequently colonized by microorganisms leading to undesired consequences like hygienic problems. Biocidal coatings often raise environmental and health concerns, thus sustainable, biocide-free coatings are of interest. To develop novel anti-adhesive textile coatings, a rapid, reliable, and quantitative high-throughput method to study microbial attachment to fabrics is required, however currently not available. Here, a fast and reliable 96-well plate-based screening method is developed. The quantification of bacterial adhesion is based on nucleic acid staining by SYTO9, with Pseudomonas aeruginosa and Staphylococcus aureus as the model microorganisms. Subsequently, 38 commercially available and novel coatings were evaluated for their anti-bacterial adhesion properties. A poly(l-lysine)-g-poly(ethylene glycol) coating on polyester textile substratum revealed an 80% reduction of bacterial adhesion. Both the coating itself and the anti-adhesive property were stable after 20 washing cycles, confirmed by X-ray analysis. The assay provides an efficient tool to rapidly screen for non-biocidal coatings reducing bacterial attachment.
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23
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Jin J, Han Y, Zhang C, Liu J, Jiang W, Yin J, Liang H. Effect of grafted PEG chain conformation on albumin and lysozyme adsorption: A combined study using QCM-D and DPI. Colloids Surf B Biointerfaces 2015; 136:838-44. [PMID: 26546889 DOI: 10.1016/j.colsurfb.2015.10.025] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 09/20/2015] [Accepted: 10/19/2015] [Indexed: 12/23/2022]
Abstract
In this study, elucidation of protein adsorption mechanism is performed using dual polarization interferometry (DPI) and quartz crystal microbalance with dissipation (QCM-D) to study adsorption behaviors of bovine serum albumin (BSA) and lysozyme (LYZ) on poly (ethylene glycol) (PEG) layers. From the analysis of DPI, PEG2000 and PEG5000 show tight and loose mushroom conformations, respectively. Small amount of LYZ could displace the interfacial water surrounding the tight mushroomed PEG2000 chains by hydrogen bond attraction, leading to protein adsorption. The loose mushroomed PEG5000 chains exhibit a more flexible conformation and high elastic repulsion energy that could prevent protein adsorption of all BSA and most of LYZ. From the analysis of QCM, PEG2000 and PEG5000 show tight and extended brush conformations. The LYZ adsorbed mass has critical regions of PEG2000 (0.19 chain/nm(2)) and PEG5000 (0.16 chain/nm(2)) graft density. When graft density of PEG is higher than the critical region (brush conformations), the attraction of hydrogen bonds between PEG and LYZ is the dominant factor. When graft density of PEG is lower than the critical region (mushroom conformations), elastic repulsion between PEG and proteins is driven by the high conformation entropy of PEG chains, which is the dominant force of steric repulsion in PEG-protein systems. Therefore, the adsorption of BSA is suppressed by the high elastic repulsion energy of PEG chains, whereas the adsorption of LYZ is balanced by the interactions between the repulsion of entropy elasticity and the attraction of hydrogen bonds.
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Affiliation(s)
- Jing Jin
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
| | - Yuanyuan Han
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
| | - Chang Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
| | - Jingchuan Liu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
| | - Wei Jiang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China.
| | - Jinghua Yin
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China.
| | - Haojun Liang
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, PR China
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24
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Non-proteinaceous bacterial adhesins challenge the antifouling properties of polymer brush coatings. Acta Biomater 2015; 24:64-73. [PMID: 26093067 DOI: 10.1016/j.actbio.2015.05.037] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 05/24/2015] [Accepted: 05/28/2015] [Indexed: 11/21/2022]
Abstract
Polymer brushes of poly(ethylene glycol) have long been considered the gold standard for antifouling surfaces that resist adsorption of biomolecules and attachment of microorganisms. However, despite displaying excellent resistance to protein adsorption, the polymer brush coatings cannot entirely avoid colonization by bacteria. Here we investigate and identify which non-proteinaceous bacterial adhesins challenge the antifouling properties of polymer brush coatings and how these challenges might be overcome. We quantified biofilm formation on a well-known polymer brush coating of poly(l-lysine)-graft-poly(ethylene glycol) (PLL-g-PEG) on titanium. The coating successfully resisted colonization by Staphylococcus aureus and Pseudomonas aeruginosa, but not Staphylococcus epidermidis. This colonization pattern was also reflected on the adhesion forces measured on single bacterial cells. The biofilm produced from S. epidermidis on PLL-g-PEG were found to be rich in polysaccharides and extracellular DNA, and quantification of DNA, polysaccharides and proteins on PLL-g-PEG surfaces revealed that although the coating almost fully resisted protein adsorption, polysaccharides could adsorb, and exposure to DNA led to desorption of the polymer from the titanium surface. We hypothesized that this problem could be overcome by increasing the polymer brush density to better resist the penetration of DNA and polysaccharides into the polymer layer. Indeed, high density PLL-g-PEG brushes prepared by the recently discovered temperature-induced polyelectrolyte (TIP) grafting method resisted the interaction with DNA and polysaccharides, and therefore also the colonization by S. epidermidis. The TIP grafting is a simple improvement of PLL-g-PEG brush formation, and our results suggest that it provides an important advancement to the bacterial resistance by polymer brush coatings. STATEMENT OF SIGNIFICANCE The antifouling properties of poly(ethylene glycol) brush coatings against protein adsorption are well documented, but it is not well understood why these coatings do not perform as well against bacterial colonization when tested against a wide range of species and over periods of days. Here we investigated bacterial colonization on poly(l-lysine)-graft-poly(ethylene glycol) (PLL-g-PEG) grafted on Ti, and revealed that bacteria relying mostly on polysaccharides and extracellular DNA for adhesion and biofilm formation could successfully colonize PLL-g-PEG coated surfaces. The coatings could not resist adsorption of polysaccharides, and DNA could even desorb the coatings from the Ti surface. Fortunately, the shortcomings of conventional PLL-g-PEG could be overcome by increasing the graft density, using the recently discovered and very simple grafting method, 'temperature-induced polyelectrolyte (TIP) grafting'. Our study highlights that it is of utmost importance to develop coatings which resist adsoprtion of non-proteinaceous bacterial adhesins such as polysaccharides and DNA, and we demonstrated that TIP grafted high density PLL-g-PEG coatings are promising materials to achieve diverse bacterial resistance.
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25
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Biocompatible long-sustained release oil-core polyelectrolyte nanocarriers: From controlling physical state and stability to biological impact. Adv Colloid Interface Sci 2015; 222:678-91. [PMID: 25453660 DOI: 10.1016/j.cis.2014.10.005] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 10/15/2014] [Accepted: 10/15/2014] [Indexed: 11/20/2022]
Abstract
It has been generally expected that the most applicable drug delivery system (DDS) should be biodegradable, biocompatible and with incidental adverse effects. Among many micellar aggregates and their mediated polymeric systems, polyelectrolyte oil-core nanocarriers have been found to successfully encapsulate hydrophobic drugs in order to target cells and avoid drug degradation and toxicity as well as to improve drug efficacy, its stability, and better intracellular penetration. This paper reviews recent developments in the formation of polyelectrolyte oil-core nanocarriers by subsequent multilayer adsorption at micellar structures, their imaging, physical state and stability, drug encapsulation and applications, in vitro release profiles and in vitro biological evaluation (cellular uptake and internalization, biocompatibility). We summarize the recent results concerning polyelectrolyte/surfactant interactions at interfaces, fundamental to understand the mechanisms of formation of stable polyelectrolyte layered structures on liquid cores. The fabrication of emulsion droplets stabilized by synergetic surfactant/polyelectrolyte complexes, properties, and potential applications of each type of polyelectrolyte oil-core nanocarriers, including stealth nanocapsules with pegylated shell, are discussed and evaluated.
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26
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Zaitouna AJ, Maben AJ, Lai RY. Incorporation of extra amino acids in peptide recognition probe to improve specificity and selectivity of an electrochemical peptide-based sensor. Anal Chim Acta 2015; 886:157-64. [PMID: 26320648 DOI: 10.1016/j.aca.2015.05.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Revised: 05/17/2015] [Accepted: 05/18/2015] [Indexed: 10/23/2022]
Abstract
We investigated the effect of incorporating extra amino acids (AA) at the n-terminus of the thiolated and methylene blue-modified peptide probe on both specificity and selectivity of an electrochemical peptide-based (E-PB) HIV sensor. The addition of a flexible (SG)3 hexapeptide is, in particular, useful in improving sensor selectivity, whereas the addition of a highly hydrophilic (EK)3 hexapeptide has shown to be effective in enhancing sensor specificity. Overall, both E-PB sensors fabricated using peptide probes with the added AA (SG-EAA and EK-EAA) showed better specificity and selectivity, especially when compared to the sensor fabricated using a peptide probe without the extra AA (EAA). For example, the selectivity factor recorded in the 50% saliva was ∼2.5 for the EAA sensor, whereas the selectivity factor was 7.8 for both the SG-EAA and EK-EAA sensors. Other sensor properties such as the limit of detection and dynamic range were minimally affected by the addition of the six AA sequence. The limit of detection was 0.5 nM for the EAA sensor and 1 nM for both SG-EAA and EK-EAA sensors. The saturation target concentration was ∼200 nM for all three sensors. Unlike previously reported E-PB HIV sensors, the peptide probe functions as both the recognition element and antifouling passivating agent; this modification eliminates the need to include an additional antifouling diluent, which simplifies the sensor design and fabrication protocol.
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Affiliation(s)
- Anita J Zaitouna
- University of Nebraska-Lincoln, 651 Hamilton Hall, Lincoln, NE 68588-0304, USA
| | - Alex J Maben
- University of Nebraska-Lincoln, 651 Hamilton Hall, Lincoln, NE 68588-0304, USA
| | - Rebecca Y Lai
- University of Nebraska-Lincoln, 651 Hamilton Hall, Lincoln, NE 68588-0304, USA.
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27
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Zaitouna AJ, Joyce J, Cerny RL, Dussault PH, Lai RY. Comparison of Mannose, Ethylene Glycol, and Methoxy-Terminated Diluents on Specificity and Selectivity of Electrochemical Peptide-Based Sensors. Anal Chem 2015; 87:6966-73. [PMID: 26057465 DOI: 10.1021/acs.analchem.5b01759] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report the synthesis and application of three new antifouling diluents for the fabrication of an E-PB HIV sensor. Among the three thiolated antifouling diluents used in this study, the methoxy-terminated diluent (C6-MEG) is the most effective in alleviating both nonspecific binding and adsorption of matrix contaminants onto the sensor surface, especially when compared to the mannose- (C6-MAN) and ethylene-glycol-terminated (C6-EG) diluents. The sensor fabricated with C6-MEG has a specificity factor (∼13.5) substantially higher than the sensor passivated with only 6-mercapto-1-hexanol (∼1.5). It is functional even when employed directly in 25% serum, an achievement that has not been observed with this class of E-PB sensors. More importantly, incorporation of these antifouling diluents has negligible impact on other important sensor properties such as sensitivity and binding kinetics. This sensor passivation strategy is versatile and can potentially be used with other E-PB sensors, as well as surface-based sensors that utilize thiol-gold self-assembled monolayer chemistry.
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Affiliation(s)
- Anita J Zaitouna
- †Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0304, United States
| | - Jesse Joyce
- †Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0304, United States
| | - Ronald L Cerny
- †Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0304, United States
| | - Patrick H Dussault
- †Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0304, United States
| | - Rebecca Y Lai
- †Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0304, United States
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Xiao Y, Zhao L, Shi Y, Liu N, Liu Y, Liu B, Xu Q, He C, Chen X. Surface modification of 316L stainless steel by grafting methoxy poly(ethylene glycol) to improve the biocompatibility. Chem Res Chin Univ 2015. [DOI: 10.1007/s40242-015-5027-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sevilla P, Vining KV, Dotor J, Rodriguez D, Gil FJ, Aparicio C. Surface immobilization and bioactivity of TGF-β1 inhibitor peptides for bone implant applications. J Biomed Mater Res B Appl Biomater 2015; 104:385-94. [DOI: 10.1002/jbm.b.33374] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 11/21/2014] [Accepted: 01/17/2015] [Indexed: 12/17/2022]
Affiliation(s)
- Pablo Sevilla
- Department of Mechanical Engineering; Escola Universitària Salesiana de Sarrià. Pg. Sant Joan Bosco 74; 08017 Barcelona Spain
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Engineering, Technical University of Catalonia, Pav. E; Av. Diagonal 647 Barcelona Spain
| | - Kyle V. Vining
- MDRCBB-Minnesota Dental Research Center for Biomechanics and Biomaterials, Department of Restorative Sciences, University of Minnesota School of Dentistry; 16-250A Moos Tower 515 Delaware St. SE Minneapolis MN 55455 USA
| | - Javier Dotor
- DIGNA Biotech, R+D Department. Calle Orense 85, Edificio Lexington; 28020 Madrid Spain
| | - Daniel Rodriguez
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Engineering, Technical University of Catalonia, Pav. E; Av. Diagonal 647 Barcelona Spain
| | - F. Javier Gil
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Engineering, Technical University of Catalonia, Pav. E; Av. Diagonal 647 Barcelona Spain
| | - Conrado Aparicio
- MDRCBB-Minnesota Dental Research Center for Biomechanics and Biomaterials, Department of Restorative Sciences, University of Minnesota School of Dentistry; 16-250A Moos Tower 515 Delaware St. SE Minneapolis MN 55455 USA
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30
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Pop-Georgievski O, Kubies D, Zemek J, Neykova N, Demianchuk R, Chánová EM, Šlouf M, Houska M, Rypáček F. Self-assembled anchor layers/polysaccharide coatings on titanium surfaces: a study of functionalization and stability. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2015; 6:617-631. [PMID: 25821702 PMCID: PMC4362089 DOI: 10.3762/bjnano.6.63] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 02/05/2015] [Indexed: 05/20/2023]
Abstract
Composite materials based on a titanium support and a thin, alginate hydrogel could be used in bone tissue engineering as a scaffold material that provides biologically active molecules. The main objective of this contribution is to characterize the activation and the functionalization of titanium surfaces by the covalent immobilization of anchoring layers of self-assembled bisphosphonate neridronate monolayers and polymer films of 3-aminopropyltriethoxysilane and biomimetic poly(dopamine). These were further used to bind a bio-functional alginate coating. The success of the titanium surface activation, anchoring layer formation and alginate immobilization, as well as the stability upon immersion under physiological-like conditions, are demonstrated by different surface sensitive techniques such as spectroscopic ellipsometry, infrared reflection-absorption spectroscopy and X-ray photoelectron spectroscopy. The changes in morphology and the established continuity of the layers are examined by scanning electron microscopy, surface profilometry and atomic force microscopy. The changes in hydrophilicity after each modification step are further examined by contact angle goniometry.
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Affiliation(s)
- Ognen Pop-Georgievski
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 16206 Prague 6, Czech Republic
| | - Dana Kubies
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 16206 Prague 6, Czech Republic
| | - Josef Zemek
- Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnicka 10, 16253 Prague 6, Czech Republic
| | - Neda Neykova
- Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnicka 10, 16253 Prague 6, Czech Republic
- Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Trojanova 13, 12000 Prague 2, Czech Republic
| | - Roman Demianchuk
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 16206 Prague 6, Czech Republic
| | - Eliška Mázl Chánová
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 16206 Prague 6, Czech Republic
| | - Miroslav Šlouf
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 16206 Prague 6, Czech Republic
| | - Milan Houska
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 16206 Prague 6, Czech Republic
| | - František Rypáček
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 16206 Prague 6, Czech Republic
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31
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Blaszykowski C, Sheikh S, Thompson M. A survey of state-of-the-art surface chemistries to minimize fouling from human and animal biofluids. Biomater Sci 2015. [DOI: 10.1039/c5bm00085h] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Fouling of artificial surfaces by biofluids is a plague Biotechnology deeply suffers from. Herein, we inventory the state-of-the-art surface chemistries developed to minimize this effect from both human and animal biosamples.
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Affiliation(s)
| | - Sonia Sheikh
- University of Toronto
- Department of Chemistry – St. George campus
- Toronto
- Canada M5S 3H6
| | - Michael Thompson
- Econous Systems Inc
- Toronto
- Canada M5S 3H6
- University of Toronto
- Department of Chemistry – St. George campus
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32
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Zhang L, Ning C, Zhou T, Liu X, Yeung KWK, Zhang T, Xu Z, Wang X, Wu S, Chu PK. Polymeric nanoarchitectures on Ti-based implants for antibacterial applications. ACS APPLIED MATERIALS & INTERFACES 2014; 6:17323-17345. [PMID: 25233376 DOI: 10.1021/am5045604] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Because of the excellent mechanical properties and good biocompatibility, titanium-based metals are widely used in hard tissue repair, especially load-bearing orthopedic applications. However, bacterial infection and complication during and after surgery often causes failure of the metallic implants. To endow titanium-based implants with antibacterial properties, surface modification is one of the effective strategies. Possessing the unique organic structure composed of molecular and functional groups resembling those of natural organisms, functionalized polymeric nanoarchitectures enhance not only the antibacterial performance but also other biological functions that are difficult to accomplish on many conventional bioinert metallic implants. In this review, recent advance in functionalized polymeric nanoarchitectures and the associated antimicrobial mechanisms are reviewed.
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Affiliation(s)
- Long Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Province Key Laboratory of Industrial Biotechnology, Faculty of Materials Science & Engineering, Hubei University , Wuhan, China
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33
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Cho Y, Vu BQ, Bedair TM, Park BJ, Joung YK, Han DK. Crack prevention of biodegradable polymer coating on metal facilitated by a nano-coupled interlayer. J BIOACT COMPAT POL 2014. [DOI: 10.1177/0883911514547094] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Crack prevention of biodegradable polymer coatings on drug-eluting stents was investigated by introducing a nano-coupled layer at the interface between the metal surface and the polymer coating layer using surface-initiated ring-opening polymerization of ε-caprolactone. Poly(d,l-lactide-co-glycolide) coating on cobalt-chromium control and ricinoleic acid-poly(caprolactone)–grafted cobalt-chromium was carried out using electrospraying. The cracking of the biodegradable polymer coating on drug-eluting stents during ballooning was addressed by introducing a nano-coupled interlayer on the cobalt-chromium surface. The ricinoleic acid-poly(caprolactone) nano-coupled interlayer and poly(d,l-lactide-co-glycolide)-coated top layer were characterized using attenuated total reflection Fourier transform infrared, contact angle, ellipsometry, X-ray photoelectron spectroscopy, and atomic force microscopy. Based on scratch tests, the nano-coupled samples had stronger interfacial adhesion compared to the control sample without the nano-coupled layer. Scanning electron microscope images indicated that the cracking on the poly(d,l-lactide-co-glycolide) coating was addressed. Introducing a nano-coupling interlayer may be an important strategy to preventing polymer coating cracking on drug-eluting stents.
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Affiliation(s)
- Youngjin Cho
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Bach Quang Vu
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Tarek M Bedair
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea
- Department of Biomedical Engineering, Korea University of Science and Technology, Daejeon, Republic of Korea
| | - Bang Ju Park
- Department of Electronic Engineering and Institute of Gachon Fusion Technology, Gachon University, Seongnam, Republic of Korea
| | - Yoon Ki Joung
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea
- Department of Biomedical Engineering, Korea University of Science and Technology, Daejeon, Republic of Korea
| | - Dong Keun Han
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea
- Department of Biomedical Engineering, Korea University of Science and Technology, Daejeon, Republic of Korea
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35
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Barfidokht A, Gooding JJ. Approaches Toward Allowing Electroanalytical Devices to be Used in Biological Fluids. ELECTROANAL 2014. [DOI: 10.1002/elan.201400097] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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36
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Dependence of cancer cell adhesion kinetics on integrin ligand surface density measured by a high-throughput label-free resonant waveguide grating biosensor. Sci Rep 2014; 4:4034. [PMID: 24503534 PMCID: PMC3916899 DOI: 10.1038/srep04034] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Accepted: 01/23/2014] [Indexed: 12/28/2022] Open
Abstract
A novel high-throughput label-free resonant waveguide grating (RWG) imager biosensor, the Epic® BenchTop (BT), was utilized to determine the dependence of cell spreading kinetics on the average surface density (vRGD) of integrin ligand RGD-motifs. vRGD was tuned over four orders of magnitude by co-adsorbing the biologically inactive PLL-g-PEG and the RGD-functionalized PLL-g-PEG-RGD synthetic copolymers from their mixed solutions onto the sensor surface. Using highly adherent human cervical tumor (HeLa) cells as a model system, cell adhesion kinetic data of unprecedented quality were obtained. Spreading kinetics were fitted with the logistic equation to obtain the spreading rate constant (r) and the maximum biosensor response (Δλmax), which is assumed to be directly proportional to the maximum spread contact area (Amax). r was found to be independent of the surface density of integrin ligands. In contrast, Δλmax increased with increasing RGD surface density until saturation at high densities. Interpreting the latter behavior with a simple kinetic mass action model, a 2D dissociation constant of 1753 ± 243 μm−2 (corresponding to a 3D dissociation constant of ~30 μM) was obtained for the binding between RGD-specific integrins embedded in the cell membrane and PLL-g-PEG-RGD. All of these results were obtained completely noninvasively without using any labels.
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37
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KAWABE A, NAKAGAWA I, KANNO Z, TSUTSUMI Y, HANAWA T, ONO T. Evaluation of biofilm formation in the presence of saliva on poly(ethylene glycol)deposited titanium. Dent Mater J 2014; 33:638-47. [DOI: 10.4012/dmj.2014-025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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38
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Jiang G, Sun J, Ding F. PEG-g-chitosan thermosensitive hydrogel for implant drug delivery: cytotoxicity, in vivo degradation and drug release. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2013; 25:241-56. [PMID: 24160458 DOI: 10.1080/09205063.2013.851542] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Thermosensitive hydrogels based on chitosan are of great interests for injectable implant drug delivery. The poly(ethylene glycol)-grafted-chitosan (PEG-g-CS) hydrogel was reported as a potential thermosensitive system. The objective of the present study is to evaluate the cytotoxicity, in vivo degradation and drug release of PEG-g-CS hydrogel. Cytotoxicity was evaluated using L929 murine fibrosarcoma cell line. Degradation and drug release in vivo were investigated by subcutaneous injection of the hydrogel into Sprague-Dawley rats. PEG-g-CS polymer exhibits no significant cytotoxicity when its concentration is less than 3 mg mL(-1). After being implanted, PEG-g-CS hydrogel maintains its integrity for two weeks and collapses, merging into the tissue, in the third week. It causes moderate inflammatory response but no fibrous encapsulation around the hydrogel is found. The hydrogel presents a three-week sustained release of cyclosporine A with no significant burst release in vitro and produces the effective drug concentration in blood for more than five weeks in vivo, performing almost the same bioavailability to chitosan/glycerophosphate hydrogel. Further modifications of PEG-g-CS hydrogel might be necessary to modulate the degradation and to mitigate the fluctuations in blood drug concentration.
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Affiliation(s)
- Guoqiang Jiang
- a Key Laboratory of Industrial Biocatalysis of Ministry of Education, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , P.R. China
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39
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Teo BM, van der Westen R, Hosta-Rigau L, Städler B. Cell response to PEGylated poly(dopamine) coated liposomes considering shear stress. Biochim Biophys Acta Gen Subj 2013; 1830:4838-47. [DOI: 10.1016/j.bbagen.2013.06.022] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 06/06/2013] [Accepted: 06/17/2013] [Indexed: 12/13/2022]
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40
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Direct grafting of anti-fouling polyglycerol layers to steel and other technically relevant materials. Colloids Surf B Biointerfaces 2013; 111:360-6. [PMID: 23856542 DOI: 10.1016/j.colsurfb.2013.05.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Revised: 05/14/2013] [Accepted: 05/17/2013] [Indexed: 12/29/2022]
Abstract
Direct grafting of hyperbranched polyglycerol (PG) layers onto the oxide surfaces of steel, aluminum, and silicon has been achieved through surface-initiated polymerization of 2-hydroxymethyloxirane (glycidol). Optimization of the deposition conditions led to a protocol that employed N-methyl-2-pyrrolidone (NMP) as the solvent and temperatures of 100 and 140 °C, depending on the substrate material. In all cases, a linear growth of the PG layers could be attained, which allows for control of film thickness by altering the reaction time. At layer thicknesses >5 nm, the PG layers completely suppressed the adhesion of albumin, fibrinogen, and globulin. These layers were also at least 90% bio-repulsive for two bacteria strains, E. coli and Acinetobacter baylyi, with further improvement being observed when the PG film thickness was increased to 17 nm (up to 99.9% bio-repulsivity on silicon).
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41
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Tuning thermoresponsive behavior of diblock copolymers and their gold core hybrids. Part 2. How properties change depending on block attachment to gold nanoparticles. J Colloid Interface Sci 2013; 396:39-46. [PMID: 23484770 DOI: 10.1016/j.jcis.2013.01.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Revised: 12/30/2012] [Accepted: 01/04/2013] [Indexed: 11/21/2022]
Abstract
Thermoresponsive diblock copolymers of di(ethylene glycol) methyl ether methacrylate (DEGMA) and oligo(ethylene glycol) methyl ether acrylate (OEGA) were synthesized by reversible addition-fragmentation chain transfer polymerization, allowing us to prepare diblocks with a thiol group at the desired chain end, and bond that block to a ~20 nm gold nanoparticle core. The cloud point and coil-globule transition window were measured by UV-vis spectroscopy. The gold core lowered the cloud point and narrowed the coil-globule transition window of all the diblock hybrids, but raised the cloud point of statistical copolymer hybrids that had similar cloud points. The extent of the change in the thermo-response properties of the hybrid diblock copolymers was more significant when the gold was bonded to the DEGMA block than the OEGA block. This block is less hydrophilic and sterically hindered than OEGA and may adsorb more effectively to the gold so that the hydration of the outer OEGA block is relatively unaffected by the Au core. This work indicates that diblock copolymers allow factors such as steric bulk and the effects on arrangement around a metal core to be effective tools for manipulating thermo-responsive properties that are not as significant with statistical copolymers.
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42
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Narayan P, Ganzinger KA, McColl J, Weimann L, Meehan S, Qamar S, Carver JA, Wilson MR, St. George-Hyslop P, Dobson CM, Klenerman D. Single molecule characterization of the interactions between amyloid-β peptides and the membranes of hippocampal cells. J Am Chem Soc 2013; 135:1491-8. [PMID: 23339742 PMCID: PMC3561772 DOI: 10.1021/ja3103567] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Indexed: 12/22/2022]
Abstract
Oligomers of the 40 and 42 residue amyloid-β peptides (Aβ40 and Aβ42) have been implicated in the neuronal damage and impaired cognitive function associated with Alzheimer's disease. However, little is known about the specific mechanisms by which these misfolded species induce such detrimental effects on cells. In this work, we use single-molecule imaging techniques to examine the initial interactions between Aβ monomers and oligomers and the membranes of live cells. This highly sensitive method enables the visualization of individual Aβ species on the cell surface and characterization of their oligomerization state, all at biologically relevant, nanomolar concentrations. The results indicate that oligomers preferentially interact with cell membranes, relative to monomers and that the oligomers become immobilized on the cell surface. Additionally, we observe that the interaction of Aβ species with the cell membrane is inhibited by the presence of ATP-independent molecular chaperones. This study demonstrates the power of this methodology for characterizing the interactions between protein aggregates and the membranes of live neuronal cells at physiologically relevant concentrations and opens the door to quantitative studies of the cellular responses to potentially pathogenic oligomers.
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Affiliation(s)
- Priyanka Narayan
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge,
United Kingdom CB2 1EW
| | - Kristina A. Ganzinger
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge,
United Kingdom CB2 1EW
| | - James McColl
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge,
United Kingdom CB2 1EW
| | - Laura Weimann
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge,
United Kingdom CB2 1EW
| | - Sarah Meehan
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge,
United Kingdom CB2 1EW
| | - Seema Qamar
- Cambridge Institute
for Medical Research, Wellcome Trust/MRC Building, Addenbrooke’s
Hospital, Hills Road, Cambridge, United Kingdom CB2 0XY
| | - John A. Carver
- School of Chemistry and
Physics, University of Adelaide, Adelaide,
South Australia 5005, Australia
| | - Mark R. Wilson
- School of Biological Sciences, University of Wollongong, Wollongong, New South Wales
2522, Australia
| | - Peter St. George-Hyslop
- Cambridge Institute
for Medical Research, Wellcome Trust/MRC Building, Addenbrooke’s
Hospital, Hills Road, Cambridge, United Kingdom CB2 0XY
| | - Christopher M. Dobson
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge,
United Kingdom CB2 1EW
| | - David Klenerman
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge,
United Kingdom CB2 1EW
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43
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Chen X, Li Y, Aparicio C. Biofunctional Coatings for Dental Implants. THIN FILMS AND COATINGS IN BIOLOGY 2013. [DOI: 10.1007/978-94-007-2592-8_4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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44
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Chen J, Wang J, Qi P, Li X, Ma B, Chen Z, Li Q, Zhao Y, Xiong K, Maitz MF, Huang N. Biocompatibility studies of poly(ethylene glycol)–modified titanium for cardiovascular devices. J BIOACT COMPAT POL 2012. [DOI: 10.1177/0883911512461108] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The rapid protein adsorption on a material surface causes blood coagulation, platelet activation, and complement system activation, which poses a risk for failure of cardiovascular devices. In this study, a chemically hydroxylated titanium surface was aminosilanized and covalently grafted with poly(ethylene glycol). The reaction conditions on the grafted quantity were studied by the respective amine and carboxyl densities. The blood compatibility of the PEGylated surfaces with different poly(ethylene glycol) densities and chain lengths was evaluated; the PEGylated surfaces with higher grafted density and longer chain length had less fibrinogen adsorption, less fibrinogen γ-chain exposed, less adherent platelets, and lower activation of the adherent platelets. In addition to the influence on blood, the longer chain PEGylated surfaces resisted, not only smooth muscle cell attachment and proliferation, but also macrophage attachment and death. This method is a good candidate for improving cardiovascular implant surfaces.
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Affiliation(s)
- Jialong Chen
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, China
- College of Stomatology, Anhui Medical University, Hefei, China
| | - Juan Wang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, China
| | - Pengkai Qi
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, China
| | - Xin Li
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, China
| | - Baolong Ma
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, China
| | - Zhuoyue Chen
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, China
| | - Quanli Li
- College of Stomatology, Anhui Medical University, Hefei, China
| | - Yuancong Zhao
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, China
| | - Kaiqin Xiong
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, China
| | - Manfred F Maitz
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, China
- Max Bergmann Center of Biomaterials Dresden, Leibniz Institute of Polymer Research Dresden, Dresden, Germany
| | - Nan Huang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, China
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45
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Ogaki R, Zoffmann Andersen O, Jensen GV, Kolind K, Kraft DCE, Pedersen JS, Foss M. Temperature-Induced Ultradense PEG Polyelectrolyte Surface Grafting Provides Effective Long-Term Bioresistance against Mammalian Cells, Serum, and Whole Blood. Biomacromolecules 2012; 13:3668-77. [DOI: 10.1021/bm301125g] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ryosuke Ogaki
- Interdisciplinary
Nanoscience Center (iNANO) and ‡Department of Chemistry, Faculty of
Science and Technology, and §Department of Orthodontics, School of Dentistry, Aarhus University, Aarhus, Denmark
| | - Ole Zoffmann Andersen
- Interdisciplinary
Nanoscience Center (iNANO) and ‡Department of Chemistry, Faculty of
Science and Technology, and §Department of Orthodontics, School of Dentistry, Aarhus University, Aarhus, Denmark
| | - Grethe Vestergaard Jensen
- Interdisciplinary
Nanoscience Center (iNANO) and ‡Department of Chemistry, Faculty of
Science and Technology, and §Department of Orthodontics, School of Dentistry, Aarhus University, Aarhus, Denmark
| | - Kristian Kolind
- Interdisciplinary
Nanoscience Center (iNANO) and ‡Department of Chemistry, Faculty of
Science and Technology, and §Department of Orthodontics, School of Dentistry, Aarhus University, Aarhus, Denmark
| | - David Christian Evar Kraft
- Interdisciplinary
Nanoscience Center (iNANO) and ‡Department of Chemistry, Faculty of
Science and Technology, and §Department of Orthodontics, School of Dentistry, Aarhus University, Aarhus, Denmark
| | - Jan Skov Pedersen
- Interdisciplinary
Nanoscience Center (iNANO) and ‡Department of Chemistry, Faculty of
Science and Technology, and §Department of Orthodontics, School of Dentistry, Aarhus University, Aarhus, Denmark
| | - Morten Foss
- Interdisciplinary
Nanoscience Center (iNANO) and ‡Department of Chemistry, Faculty of
Science and Technology, and §Department of Orthodontics, School of Dentistry, Aarhus University, Aarhus, Denmark
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46
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Pop-Georgievski O, Verreault D, Diesner MO, Proks V, Heissler S, Rypácek F, Koelsch P. Nonfouling poly(ethylene oxide) layers end-tethered to polydopamine. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:14273-83. [PMID: 22989020 PMCID: PMC3489920 DOI: 10.1021/la3029935] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Nonfouling surfaces capable of reducing protein adsorption are highly desirable in a wide range of applications. Coating of surfaces with poly(ethylene oxide) (PEO), a water-soluble, nontoxic, and nonimmunogenic polymer, is most frequently used to reduce nonspecific protein adsorption. Here we show how to prepare dense PEO brushes on virtually any substrate by tethering PEO to polydopamine (PDA)-modified surfaces. The chain lengths of hetero-bifunctional PEOs were varied in the range of 45-500 oxyethylene units (M(n) = 2000-20,000). End-tethering of PEO chains was performed through amine and thiol headgroups from reactive polymer melts to minimize excluded volume effects. Surface plasmon resonance (SPR) was applied to investigate the adsorption of model protein solutions and complex biologic medium (human blood plasma) to the densely packed PEO brushes. The level of protein adsorption of human serum albumin and fibrinogen solutions was below the detection limit of the SPR measurements for all PEO chains end-tethered to PDA, thus exceeding the protein resistance of PEO layers tethered directly on gold. It was found that the surface resistance to adsorption of lysozyme and human blood plasma increased with increasing length and brush character of the PEO chains end-tethered to PDA with a similar or better resistance in comparison to PEO layers on gold. Furthermore, the chain density, thickness, swelling, and conformation of PEO layers were determined using spectroscopic ellipsometry (SE), dynamic water contact angle (DCA) measurements, infrared reflection-absorption spectroscopy (IRRAS), and vibrational sum-frequency-generation (VSFG) spectroscopy, the latter in air and water.
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Blaszykowski C, Sheikh S, Thompson M. Surface chemistry to minimize fouling from blood-based fluids. Chem Soc Rev 2012; 41:5599-612. [PMID: 22772072 DOI: 10.1039/c2cs35170f] [Citation(s) in RCA: 217] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Upon contact with bodily fluids/tissues, exogenous materials spontaneously develop a layer of proteins on their surface. In the case of biomedical implants and equipment, biological processes with deleterious effects may ensue. For biosensing platforms, it is synonymous with an overwhelming background signal that prevents the detection/quantification of target analytes present in considerably lower concentrations. To address this ubiquitous problem, tremendous efforts have been dedicated over the years to engineer protein-resistant coatings. There is now extensive literature available on stealth organic adlayers able to minimize fouling down to a few ng cm(-2), however from technologically irrelevant single-protein buffered solutions. Unfortunately, few coatings have been reported to present such level of performance when exposed to highly complex proteinaceous, real-world media such as blood serum and plasma, even diluted. Herein, we concisely review the surface chemistry developed to date to minimize fouling from these considerably more challenging blood-based fluids. Adsorption dynamics is also discussed.
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Affiliation(s)
- Christophe Blaszykowski
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada M5S 3H6
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Schricker SR, Palacio MLB, Bhushan B. Designing nanostructured block copolymer surfaces to control protein adhesion. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2012; 370:2348-2380. [PMID: 22509062 PMCID: PMC7398454 DOI: 10.1098/rsta.2011.0484] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The profile and conformation of proteins that are adsorbed onto a polymeric biomaterial surface have a profound effect on its in vivo performance. Cells and tissue recognize the protein layer rather than directly interact with the surface. The chemistry and morphology of a polymer surface will govern the protein behaviour. So, by controlling the polymer surface, the biocompatibility can be regulated. Nanoscale surface features are known to affect the protein behaviour, and in this overview the nanostructure of self-assembled block copolymers will be harnessed to control protein behaviour. The nanostructure of a block copolymer can be controlled by manipulating the chemistry and arrangement of the blocks. Random, A-B and A-B-A block copolymers composed of methyl methacrylate copolymerized with either acrylic acid or 2-hydroxyethyl methacrylate will be explored. Using atomic force microscopy (AFM), the surface morphology of these block copolymers will be characterized. Further, AFM tips functionalized with proteins will measure the adhesion of that particular protein to polymer surfaces. In this manner, the influence of block copolymer morphology on protein adhesion can be measured. AFM tips functionalized with antibodies to fibronectin will determine how the surfaces will affect the conformation of fibronectin, an important parameter in evaluating surface biocompatibility.
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Affiliation(s)
- Scott R Schricker
- Restorative and Prosthetic Dentistry Section, College of Dentistry, Ohio State University, Columbus, 43210, USA.
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49
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Liazoghli D, Roth AD, Thostrup P, Colman DR. Substrate Micropatterning as a New in Vitro Cell Culture System to Study Myelination. ACS Chem Neurosci 2012; 3:90-95. [PMID: 22348182 PMCID: PMC3279957 DOI: 10.1021/cn2000734] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Accepted: 12/05/2011] [Indexed: 11/29/2022] Open
Abstract
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Myelination is a highly regulated developmental process
whereby
oligodendrocytes in the central nervous system and Schwann cells in
the peripheral nervous system ensheathe axons with a multilayered
concentric membrane. Axonal myelination increases the velocity of
nerve impulse propagation. In this work, we present a novel in vitro
system for coculturing primary dorsal
root ganglia neurons along with myelinating cells on a highly restrictive
and micropatterned substrate. In this new coculture system, neurons
survive for several weeks, extending long axons on defined Matrigel
tracks. On these axons, myelinating cells can achieve robust myelination,
as demonstrated by the distribution of compact myelin and nodal markers.
Under these conditions, neurites and associated myelinating cells
are easily accessible for studies on the mechanisms of myelin formation
and on the effects of axonal damage on the myelin sheath.
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Affiliation(s)
- Dalinda Liazoghli
- Montreal Neurological
Institute, McGill University, 3801 University
Street, Montreal,
QC, H3A 2B4 Canada
- McGill
Program in Neuroengineering, McGill University, 3801 University Street, Montreal, Qc, H3A 2B4, Canada
| | - Alejandro D. Roth
- Departamento de Biología,
Facultad de Ciencias, Universidad de Chile, C.P. 780-0023, Santiago, Chile
| | - Peter Thostrup
- McGill
Program in Neuroengineering, McGill University, 3801 University Street, Montreal, Qc, H3A 2B4, Canada
| | - David R. Colman
- Montreal Neurological
Institute, McGill University, 3801 University
Street, Montreal,
QC, H3A 2B4 Canada
- McGill
Program in Neuroengineering, McGill University, 3801 University Street, Montreal, Qc, H3A 2B4, Canada
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50
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Nguyen MN, Lebarbe T, Zouani OF, Pichavant L, Durrieu MC, Héroguez V. Impact of RGD Nanopatterns Grafted onto Titanium on Osteoblastic Cell Adhesion. Biomacromolecules 2012; 13:896-904. [DOI: 10.1021/bm201812u] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Minh Ngoc Nguyen
- CNRS UMR5629, Laboratoire de
Chimie des Polymères Organiques, IPB-ENSCBP, Université de Bordeaux 1, 16 avenue Pey Berland F-33607 Pessac,
France
| | - Thomas Lebarbe
- CNRS UMR5629, Laboratoire de
Chimie des Polymères Organiques, IPB-ENSCBP, Université de Bordeaux 1, 16 avenue Pey Berland F-33607 Pessac,
France
| | - Omar F. Zouani
- CNRS UMR 5248 CBMN,
Institut
Européen de Chimie et Biologie (IECB), Université de Bordeaux 1, 2 rue Robert Escarpit F-33607 Pessac
Cedex, France
| | - Loïc Pichavant
- CNRS UMR5629, Laboratoire de
Chimie des Polymères Organiques, IPB-ENSCBP, Université de Bordeaux 1, 16 avenue Pey Berland F-33607 Pessac,
France
- CNRS UMR 5248 CBMN,
Institut
Européen de Chimie et Biologie (IECB), Université de Bordeaux 1, 2 rue Robert Escarpit F-33607 Pessac
Cedex, France
| | - Marie-Christine Durrieu
- CNRS UMR 5248 CBMN,
Institut
Européen de Chimie et Biologie (IECB), Université de Bordeaux 1, 2 rue Robert Escarpit F-33607 Pessac
Cedex, France
| | - Valérie Héroguez
- CNRS UMR5629, Laboratoire de
Chimie des Polymères Organiques, IPB-ENSCBP, Université de Bordeaux 1, 16 avenue Pey Berland F-33607 Pessac,
France
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