1
|
Wang Y, Cheng C, Li S, Sun S, Zhao C. Immobilization of carbonic anhydrase on modified PES membranes for artificial lungs. J Mater Chem B 2024; 12:2364-2372. [PMID: 38345129 DOI: 10.1039/d3tb02553e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
The introduction of carbonic anhydrase (CA) onto an extracorporeal membrane oxygenation (ECMO) membrane can improve the permeability of carbon dioxide (CO2). However, existing CA-grafting methods have limitations, and the hemocompatibility of current substrate membranes of commercial ECMO is not satisfactory. In this study, a 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC)/N-hydroxy succinimide (NHS) activation method is adopted to graft CA with CO2-catalyzed conversion activity onto a polyethersulfone (PES) membrane, which is prepared by a phase inversion technique after in situ crosslinking polymerization of 1-vinyl-2-pyrrolidone (VP) and acrylic acid (AA) in PES solution. The characterization results reveal that CA has been grafted onto the modified PES membrane successfully and exhibits catalytic activity. The kinetic parameters of esterase activity verify that the grafted amount of active CA increases with an increase in the concentration of the CA incubation solution. The CA-grafted membrane (CA-M) can accelerate the conversion of bicarbonate to CO2 in water and blood, which demonstrates the special catalytic activity towards bicarbonate of CA. Finally, blood compatibility tests prove that the CA-M does not lead to hemolysis, shows suppressed protein adsorption and increased coagulation time, and is suitable for application in ECMO. This work demonstrates a green and efficient method for preparing bioactive materials and has practical guiding significance for subsequent pulmonary membrane research and ECMO applications.
Collapse
Affiliation(s)
- Yi Wang
- Sichuan University, College Biomedical Engineering, Chengdu 610065, Sichuan, P. R. China
| | - Chong Cheng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China.
| | - Shuang Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China.
| | - Shudong Sun
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China.
| | - Changsheng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China.
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
| |
Collapse
|
2
|
Gao C, Zhang Q, Yang Y, Li Y, Lin W. Recent trends in therapeutic application of engineered blood purification materials for kidney disease. Biomater Res 2022; 26:5. [PMID: 35120554 PMCID: PMC8815201 DOI: 10.1186/s40824-022-00250-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 01/10/2022] [Indexed: 12/11/2022] Open
Abstract
Blood purification is a commonly used method to remove excess metabolic waste in the blood in renal replacement therapy. The sufficient removal of these toxins from blood can reduce complications and improve survival lifetime in dialysis patients. However, the current biological blood purification materials in clinical practice are not ideal, where there is an unmet need for producing novel materials that have better biocompatibility, reduced toxicity, and, in particular, more efficient toxin clearance rates and a lower cost of production. Given this, this review has carefully summarized newly developed engineered different structural biomedical materials for blood purification in terms of types and structure characteristics of blood purification materials, the production process, as well as interfacial chemical adsorption properties or mechanisms. This study may provide a valuable reference for fabricating a user-friendly purification device that is more suitable for clinical blood purification applications in dialysis patients.
Collapse
Affiliation(s)
- Cui Gao
- Kidney Disease Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, Zhejiang, China
| | - Qian Zhang
- Kidney Disease Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, Zhejiang, China
| | - Yi Yang
- Kidney Disease Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, Zhejiang, China.
- Department of Nephology, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, 322000, Zhejiang, China.
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, 322000, Zhejiang, China.
| | - Yangyang Li
- Key Laboratory of Women's Reproductive Health Research of Zhejiang Province, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, Zhejiang, China.
- Cancer Center, Zhejiang University, Hangzhou, 310058, Zhejiang, China.
| | - Weiqiang Lin
- Kidney Disease Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, Zhejiang, China.
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, 322000, Zhejiang, China.
| |
Collapse
|
3
|
Cho DH, Xie T, Mulcahey PJ, Kelleher NP, Hahm JI. Distinctive Adsorption Mechanism and Kinetics of Immunoglobulin G on a Nanoscale Polymer Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1458-1470. [PMID: 35037456 DOI: 10.1021/acs.langmuir.1c02710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Elucidation of protein adsorption beyond simple polymer surfaces to those presenting greater chemical complexity and nanoscopic features is critical to developing well-controlled nanobiomaterials and nanobiosensors. In this study, we repeatedly and faithfully track individual proteins on the same nanodomain areas of a block copolymer (BCP) surface and monitor the adsorption and assembly behavior of a model protein, immunoglobulin G (IgG), over time into a tight surface-packed structure. With discrete protein adsorption events unambiguously visualized at the biomolecular level, the detailed assembly and packing states of IgG on the BCP nanodomain surface are subsequently correlated to various regimes of IgG adsorption kinetic plots. Intriguing features, entirely different from those observed from macroscopic homopolymer templates, are identified from the IgG adsorption isotherms on the nanoscale, chemically varying BCP surface. They include the presence of two Langmuir-like adsorption segments and a nonmonotonic regime in the adsorption plot. Via correlation to time-corresponding topographic data, the unique isotherm features are explained with single biomolecule level details of the IgG adsorption pathway on the BCP. This work not only provides much needed, direct experimental evidence for time-resolved, single protein level, adsorption events on nanoscale polymer surfaces but also signifies mutual linking between specific topographic states of protein adsorption and assembly to particular segments of adsorption isotherms. From the fundamental research viewpoint, the correlative ability to examine the nanoscopic surface organizations of individual proteins and their local as well as global adsorption kinetic profiles will be highly valuable for accurately determining protein assembly mechanisms and interpreting protein adsorption kinetics on nanoscale surfaces. Application-wise, such knowledge will also be important for fundamentally guiding the design and development of biomaterials and biomedical devices that exploit nanoscale polymer architectures.
Collapse
Affiliation(s)
- David H Cho
- Department of Chemistry, Georgetown University, 37th & O Sts. NW., Washington, D.C. 20057, United States
| | - Tian Xie
- Department of Chemistry, Georgetown University, 37th & O Sts. NW., Washington, D.C. 20057, United States
| | - Patrick J Mulcahey
- Department of Chemistry, Georgetown University, 37th & O Sts. NW., Washington, D.C. 20057, United States
| | - Noah P Kelleher
- Department of Chemistry, Georgetown University, 37th & O Sts. NW., Washington, D.C. 20057, United States
| | - Jong-In Hahm
- Department of Chemistry, Georgetown University, 37th & O Sts. NW., Washington, D.C. 20057, United States
| |
Collapse
|
4
|
Venkatesh K, Arthanareeswaran G, Suresh Kumar P, Kweon J. Fabrication of Zwitterion TiO 2 Nanomaterial-Based Nanocomposite Membranes for Improved Antifouling and Antibacterial Properties and Hemocompatibility and Reduced Cytotoxicity. ACS OMEGA 2021; 6:20279-20291. [PMID: 34395976 PMCID: PMC8358967 DOI: 10.1021/acsomega.1c02151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 07/13/2021] [Indexed: 06/13/2023]
Abstract
Although zwitterion nanomaterials exhibit outstanding antifouling property, hemocompatibility, and antibacterial activity, their poor solubility in organic solvents limits their practical applications. In the present study, natural lysine (amino acids) was surface-grafted onto one-dimensional (1D) TiO2 nanofibers (NFs) through an epoxy ring opening in which the 3-glycidyloxypropyl (dimethoxy) methyl silane was used as a coupling agent. Chemical binding and morphological studies, such as Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy, were conducted to confirm the successful grafting of lysine onto the TiO2 NFs. The lysine-grafted TiO2 NF-polyethersulfone (PES) membrane induced electrostatic interactions and increased the surface charges from -28 to 16 mV in ζ-potential analysis. The lysine exhibited zwitterion characteristics owing to the presence of amino (cations) and carboxyl (anions) functional groups. Moreover, the modified TiO2-PES zwitterion membranes exhibited good water flux performances compared to the pristine membrane. ZT-4 membrane displayed the highest water fluxand bovine serum albumin (BSA) rejection of 137 ± 1.8 L m-2 h-1 and 94 ± 1%, respectively. The cell viability results revealed that the zwitterion PES membrane had excellent biocompatibility with peripheral blood mononuclear cells. The present work offers a convenient strategy to improve the hydrophilicity, antifouling property, and hemocompatibility of modified TiO2-PES zwitterion membranes for their biomedical and blood-contacting applications such as hemodialysis.
Collapse
Affiliation(s)
- Kanagaraj Venkatesh
- Membrane
Research Laboratory, Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli 620015, India
- Nanomaterials
Laboratory, Department of Physics, National
Institute of Technology, Tiruchirappalli 620015, India
| | - G. Arthanareeswaran
- Membrane
Research Laboratory, Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli 620015, India
| | - Palaniswamy Suresh Kumar
- Environmental
& Water Technology Centre of Innovation (EWTCOI), Ngee Ann Polytechnic, 535 Clementi Road, 599489 Singapore
| | - Jihyang Kweon
- Water
Treatment and Membrane Laboratory, Department of Environmental Engineering, Konkuk University, Seoul 05029, Republic
of Korea
| |
Collapse
|
5
|
|
6
|
Flejszar M, Chmielarz P. Surface Modifications of Poly(Ether Ether Ketone) via Polymerization Methods-Current Status and Future Prospects. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E999. [PMID: 32102217 PMCID: PMC7078635 DOI: 10.3390/ma13040999] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/14/2020] [Accepted: 02/20/2020] [Indexed: 12/24/2022]
Abstract
Surface modification of poly(ether ether ketone) (PEEK) aimed at applying it as a bone implant material aroused the unflagging interest of the research community. In view of the development of implantology and the growing demand for new biomaterials, increasing biocompatibility and improving osseointegration are becoming the primary goals of PEEK surface modifications. The main aim of this review is to summarize the use of polymerization methods and various monomers applied for surface modification of PEEK to increase its bioactivity, which is a critical factor for successful applications of biomedical materials. In addition, the future directions of PEEK surface modifications are suggested, pointing to low-ppm surface-initiated atom transfer radical polymerization (SI-ATRP) as a method with unexplored capacity for flat surface modifications.
Collapse
Affiliation(s)
| | - Paweł Chmielarz
- Department of Physical Chemistry, Faculty of Chemistry, Rzeszow University of Technology, Al. Powstańców Warszawy 6, 35-959 Rzeszów, Poland;
| |
Collapse
|
7
|
Shan L, Sun Y, Shan F, Li L, Xu ZP. Recent advances in heparinization of polymeric membranes for enhanced continuous blood purification. J Mater Chem B 2020; 8:878-894. [PMID: 31956883 DOI: 10.1039/c9tb02515d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Continuous blood purification technology such as hemodiafiltration has been used worldwide for saving patients suffering from severe diseases or organ function failure, especially in the intensive care unit and emergency setting. The filters as core devices are commonly made of polymer materials as hollow fiber membranes. However, the membrane is often inductively blocked by blood clot formation due to its interactions with blood components. Heparin is the anticoagulant often used in clinical practice for anti-coagulation. Recently, heparin is also employed to modify the hollow fiber membranes either chemically or physically to improve the filtration performance. This review summarizes recent advances in methodology for surface heparinization of such hollow fiber membranes, and their filtration performance improvement. The review also provides expert opinions for further research in this rapidly expanding field.
Collapse
Affiliation(s)
- Liang Shan
- Intensive Care Unit, The Affiliated Hospital of Qingdao University, Qingdao 266003, China and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane 4072, Australia.
| | - Yunbo Sun
- Intensive Care Unit, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - Feng Shan
- Intensive Care Unit, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - Li Li
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane 4072, Australia.
| | - Zhi Ping Xu
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane 4072, Australia.
| |
Collapse
|
8
|
Chen L, Li P, Lu X, Wang S, Zheng Z. Binary polymer brush patterns from facile initiator stickiness for cell culturing. Faraday Discuss 2019; 219:189-202. [PMID: 31317169 DOI: 10.1039/c9fd00013e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a new initiator stickiness method to fabricate micropatterned binary polymer brush surfaces, which are ideal platforms for studying cell adhesion behavior. The atom transfer radical polymerization (ATRP) initiator, ω-mercaptoundecyl bromoisobutyrate (MUDBr), is found to adsorb on several hosting polymer brushes, including poly[oligo(ethylene glycol)methyl ether methacrylate] (POEGMA), poly(2-hydroxyethyl methacrylate) (PHEMA), and poly(glycidyl methacrylate) (PGMA) brushes. Based on the initiator stickiness, micropatterned initiator molecules are printed onto a layer of homogenous hosting polymer brushes via microcontact printing (μCP), and then, vertically, a patterned second layer of polymer brushes is grown from the initiator areas. With this simple, fast, and additive method, we demonstrate the fabrication of various binary polymer brushes, and show their applications for patterning cell microarrays and controlling cell orientation. This new approach to generating binary polymer brushes shows great potential for the manipulation of interfacial phenomena, facilitating a range of applications from semiconductors and lubrication to fundamental cell biology studies.
Collapse
Affiliation(s)
- Lina Chen
- Laboratory for Advanced Interfacial Materials and Devices, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong SAR, P. R. China.
| | | | | | | | | |
Collapse
|
9
|
Mediating the Migration of Mesenchymal Stem Cells by Dynamically Changing the Density of Cell-selective Peptides Immobilized on β-Cyclodextrin-modified Cell-resisting Polymer Brushes. CHINESE JOURNAL OF POLYMER SCIENCE 2019. [DOI: 10.1007/s10118-019-2324-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
10
|
Practical guide to characterize biomolecule adsorption on solid surfaces (Review). Biointerphases 2018; 13:06D303. [PMID: 30352514 DOI: 10.1116/1.5045122] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The control over the adsorption or grafting of biomolecules from a liquid to a solid interface is of fundamental importance in different fields, such as drug delivery, pharmaceutics, diagnostics, and tissue engineering. It is thus important to understand and characterize how biomolecules interact with surfaces and to quantitatively measure parameters such as adsorbed amount, kinetics of adsorption and desorption, conformation of the adsorbed biomolecules, orientation, and aggregation state. A better understanding of these interfacial phenomena will help optimize the engineering of biofunctional surfaces, preserving the activity of biomolecules and avoiding unwanted side effects. The characterization of molecular adsorption on a solid surface requires the use of analytical techniques, which are able to detect very low quantities of material in a liquid environment without modifying the adsorption process during acquisition. In general, the combination of different techniques will give a more complete characterization of the layers adsorbed onto a substrate. In this review, the authors will introduce the context, then the different factors influencing the adsorption of biomolecules, as well as relevant parameters that characterize their adsorption. They review surface-sensitive techniques which are able to describe different properties of proteins and polymeric films on solid two-dimensional materials and compare these techniques in terms of sensitivity, penetration depth, ease of use, and ability to perform "parallel measurements."
Collapse
|
11
|
Leekrajang M, Sae-Ung P, Vilaivan T, Hoven VP. Filter paper grafted with epoxide-based copolymer brushes for activation-free peptide nucleic acid conjugation and its application for colorimetric DNA detection. Colloids Surf B Biointerfaces 2018; 173:851-859. [PMID: 30551301 DOI: 10.1016/j.colsurfb.2018.09.067] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 09/07/2018] [Accepted: 09/26/2018] [Indexed: 12/13/2022]
Abstract
Epoxide-bearing filter paper was first prepared by surface-initiated reversible addition-fragmentation chain transfer (RAFT) copolymerization of glycidyl methacrylate (GMA) and poly(ethylene glycol)methacrylate (PEGMA). Without the need for activation step, the capture peptide nucleic acid (PNA) probes carrying a C-terminal lysine modification can be directly immobilized on the surface-grafted poly[glycidyl methacrylate-ran-poly(ethylene glycol)methacrylate] (P(GMA-ran-PEGMA)) through ring-opening of epoxide groups in the GMA repeating units by amino groups in the PNA's structure. The success of P(GMA-ran-PEGMA) grafting on the filter paper and subsequent PNA immobilization was confirmed by fluorescence microscopy, Fourier transform-infrared spectroscopy and X-ray photoelectron spectroscopy. Colorimetric detection with signal amplification upon DNA hybridization relies on sandwich-hybridization assay employing another biotinylated PNA strand as a reporter probe together with streptavidin-horseradish peroxidase conjugate (SA-HRP) and o-phenylenediamine (OPD) substrate. It was found that increasing ionic strength during the DNA hybridization step by addition of NaCl can increase the signal intensity, which can be visualized by naked eye. The sensing platform showed the best performance in preventing non-specific adsorption from the non-complementary DNA and discriminating between complementary and single-mismatched targets of at least 50 fmol without the requirement for stringent hybridization or washing condition. This superior ability to suppress non-specific adsorption of non-target DNA as well as other non-DNA components may be explained as a result of hydrophilic PEGMA repeating units in the surface-grafted copolymer.
Collapse
Affiliation(s)
- Malinee Leekrajang
- Program in Petrochemistry and Polymer Science, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand
| | - Pornpen Sae-Ung
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand
| | - Tirayut Vilaivan
- Organic Synthesis Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand
| | - Voravee P Hoven
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand; Center of Excellence in Materials and Bio-interfaces, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand.
| |
Collapse
|
12
|
Ma J, Song L, Shi H, Yang H, Ye W, Guo X, Luan S, Yin J. Development of hierarchical Fe 3O 4 magnetic microspheres as solid substrates for high sensitive immunoassays. J Mater Chem B 2018; 6:3762-3769. [PMID: 32254838 DOI: 10.1039/c8tb00846a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Improving the detection sensitivity of enzyme linked immunosorbent assay (ELISA) is of the utmost importance for meeting the demand of early disease diagnosis. In this work, a sensitive solid substrate for ELISA, i.e., hierarchical iron oxide magnetic microspheres, Fe3O4@mSiO2@poly[poly(ethylene glycol) methacrylate-co-glycidyl methacrylate], was developed via a novel surface-initiated photoiniferter-mediated polymerization (SI-PIMP) strategy. The magnetic microspheres consist of a magnetic Fe3O4 core that gives a high magnetic response, a 3D backbone, a mesoporous SiO2 middle layer, that facilitates microsphere stability and provides anchoring sites, and polymer brushes, that serve as an antifouling and oriented antibody immobilization layer. As a result, the as-prepared microspheres possess a high antibody loading capacity, an enhanced detection signal and a dramatically improved sensitivity, resulting in a 25-fold improvement over conventional ELISA solid substrates.
Collapse
Affiliation(s)
- Jiao Ma
- Ministry of Education Key Laboratory of Interface Science and Engineering in Advanced Materials, Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China
| | | | | | | | | | | | | | | |
Collapse
|
13
|
Enhancement of Thermal Stability and Selectivity by Introducing Aminotriazine Comonomer to Poly(Octadecyl Acrylate)-Grafted Silica as Chromatography Matrix. SEPARATIONS 2018. [DOI: 10.3390/separations5010015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
|
14
|
Hakobyan S, Rzhepishevska O, Barbero DR, Ramstedt M. Functionalization of zwitterionic polymer brushes, do they remain antifouling? SURF INTERFACE ANAL 2018. [DOI: 10.1002/sia.6376] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
15
|
A facile way to prepare anti-fouling and blood-compatible polyethersulfone membrane via blending with heparin-mimicking polyurethanes. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 78:1035-1045. [DOI: 10.1016/j.msec.2017.04.123] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 04/10/2017] [Accepted: 04/13/2017] [Indexed: 12/15/2022]
|
16
|
Luan Y, Li D, Wei T, Wang M, Tang Z, Brash JL, Chen H. “Hearing Loss” in QCM Measurement of Protein Adsorption to Protein Resistant Polymer Brush Layers. Anal Chem 2017; 89:4184-4191. [DOI: 10.1021/acs.analchem.7b00198] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yafei Luan
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, 199 Ren’ai Road, Suzhou 215123, People’s Republic of China
| | - Dan Li
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, 199 Ren’ai Road, Suzhou 215123, People’s Republic of China
| | - Ting Wei
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, 199 Ren’ai Road, Suzhou 215123, People’s Republic of China
| | - Mengmeng Wang
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, 199 Ren’ai Road, Suzhou 215123, People’s Republic of China
| | - Zengchao Tang
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, 199 Ren’ai Road, Suzhou 215123, People’s Republic of China
| | - John L. Brash
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, 199 Ren’ai Road, Suzhou 215123, People’s Republic of China
- School
of Biomedical Engineering and Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada
| | - Hong Chen
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, 199 Ren’ai Road, Suzhou 215123, People’s Republic of China
| |
Collapse
|
17
|
One-pot synthesis of highly hemocompatible polyurethane/polyethersulfone composite membranes. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-1922-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
18
|
Nielsen SU, Koefoed L, Lund H, Daasbjerg K, Pedersen SU. Wohl-Ziegler Bromination of Electrografted Films for Optimizing Atom Transfer Radical Polymerization. ELECTROANAL 2016. [DOI: 10.1002/elan.201600208] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Stefan Urth Nielsen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Langelandsgade 140 8000 Aarhus C Denmark
| | - Line Koefoed
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Langelandsgade 140 8000 Aarhus C Denmark
| | - Henning Lund
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Langelandsgade 140 8000 Aarhus C Denmark
| | - Kim Daasbjerg
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Langelandsgade 140 8000 Aarhus C Denmark
- Carbon Dioxide Activation Center; Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Steen U. Pedersen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Langelandsgade 140 8000 Aarhus C Denmark
| |
Collapse
|
19
|
Huang J, He T, He X, Xu J, Zuo B, Wang X. Fabrication of V-shaped brushes consisting of two highly incompatible arms of PEG and fluorinated PMMA and their protein-resistance performance. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28138] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jin Huang
- Department of Chemistry; Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Education Ministry, Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Tingting He
- Department of Chemistry; Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Education Ministry, Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Xumiao He
- Department of Chemistry; Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Education Ministry, Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Jianquan Xu
- Department of Chemistry; Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Education Ministry, Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Biao Zuo
- Department of Chemistry; Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Education Ministry, Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Xinping Wang
- Department of Chemistry; Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Education Ministry, Zhejiang Sci-Tech University; Hangzhou 310018 China
| |
Collapse
|
20
|
Wang H, Black CT, Akcora P. Elastic Properties of Protein Functionalized Nanoporous Polymer Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:151-158. [PMID: 26672623 DOI: 10.1021/acs.langmuir.5b04334] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Retaining the conformational structure and bioactivity of immobilized proteins is important for biosensor designs and drug delivery systems. Confined environments often lead to changes in conformation and functions of proteins. In this study, lysozyme is chemically tethered into nanopores of polystyrene thin films, and submicron pores in poly(methyl methacrylate) films are functionalized with streptavidin. Nanoindentation experiments show that stiffness of streptavidin increases with decreasing submicron pore sizes. Lysozymes in polystyrene nanopores are found to behave stiffer than the submicron pore sizes and still retain their specific bioactivity relative to the proteins on flat surfaces. Our results show that protein functionalized ordered nanoporous polystyrene/poly(methyl methacrylate) films present heterogeneous elasticity and can be used to study interactions between free proteins and designed surfaces.
Collapse
Affiliation(s)
- Haoyu Wang
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology , 1 Castle Point on Hudson, Hoboken, New Jersey 07030, United States
| | - Charles T Black
- Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States
| | - Pinar Akcora
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology , 1 Castle Point on Hudson, Hoboken, New Jersey 07030, United States
| |
Collapse
|
21
|
Calabrese DR, Ditter D, Liedel C, Blumfield A, Zentel R, Ober CK. Design, Synthesis, and Use of Y-Shaped ATRP/NMP Surface Tethered Initiator. ACS Macro Lett 2015; 4:606-610. [PMID: 35596400 DOI: 10.1021/acsmacrolett.5b00175] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Heterogeneous polymer brushes on surfaces can be easily formed from a binary initiator on a silicon oxide substrate where two different types of polymers can be grown side-by-side. Herein, we designed a new Y-shaped binary initiator using straightforward chemistry for "grafting from" polymer brushes. This initiator synthesis takes advantage of the Passerini reaction, a multicomponent reaction combining two initiator sites and one surface linking site. This Y-shaped binary initiator can be synthesized in three steps with a higher yield than other similar initiators reported in the literature, and can be performed on a multigram scale. We were able to attach the initiator to a silicon oxide substrate and successfully grow polymer brushes from both initiators (separately and in combination), confirmed by NEXAFS, AFM, and contact angle.
Collapse
Affiliation(s)
| | - David Ditter
- Institute
of Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55099 Mainz, Germany
| | | | | | - Rudolf Zentel
- Institute
of Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55099 Mainz, Germany
| | | |
Collapse
|
22
|
Shi X, Zhan W, Chen G, Yu Q, Liu Q, Du H, Cao L, Liu X, Yuan L, Chen H. Regulation of Protein Binding Capability of Surfaces via Host-Guest Interactions: Effects of Localized and Average Ligand Density. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6172-6178. [PMID: 25986051 DOI: 10.1021/acs.langmuir.5b01380] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The protein binding capability of biomaterial surfaces can significantly affect subsequent biological responses, and appropriate ligand presentation is often required to guarantee the best functions. Herein, a new facile method for regulating this capability by varying the localized and average ligand density is presented. Binding between lysine and plasminogen relevant to a fibrinolysis system was chosen as a model. We integrated different lysine-modified β-cyclodextrin (β-CD) derivatives onto bioinert copolymer brushes via host-guest interactions. The localized and average lysine density can be conveniently modulated by changing the lysine valency on β-CD scaffolds and by diluting lysine-persubstituted β-CD with pure β-CD, respectively. Both the plasminogen adsorption and the plasminogen binding affinity were enhanced by lysine-persubstituted β-CD compared with those of lysine-monosubstituted β-CD, which is possibly due to the higher localized lysine density and the multivalent binding of plasminogen on lysine-persubstituted β-CD surfaces. With a change in the ratio of lysine-persubstituted β-CD to β-CD, the average lysine density can be tuned, leading to the linear regulation of the adsorption of plasminogen on surfaces.
Collapse
Affiliation(s)
- Xiujuan Shi
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Wenjun Zhan
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Gaojian Chen
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
- ‡Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, P. R. China
| | - Qian Yu
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Qi Liu
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Hui Du
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Limin Cao
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Xiaoli Liu
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Lin Yuan
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Hong Chen
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| |
Collapse
|
23
|
Nie C, Ma L, Xia Y, He C, Deng J, Wang L, Cheng C, Sun S, Zhao C. Novel heparin-mimicking polymer brush grafted carbon nanotube/PES composite membranes for safe and efficient blood purification. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2014.11.005] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
24
|
Wu HX, Tan L, Yang MY, Liu CJ, Zhuo RX. Protein-resistance performance of amphiphilic copolymer brushes consisting of fluorinated polymers and polyacrylamide grafted from silicon surfaces. RSC Adv 2015. [DOI: 10.1039/c4ra16036c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
A series of random copolymer brushes of acrylamide (AM) and 2-(perfluorinated hexyl)ethyl methacrylate (FMA) were grafted from initiator-functionalized silicon wafers by surface-initiated atom transfer radical polymerization.
Collapse
Affiliation(s)
- Hai-Xia Wu
- Key Laboratory of Biomedical Polymers of Ministry of Education
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan
- P. R. China
| | - Lei Tan
- Key Laboratory of Biomedical Polymers of Ministry of Education
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan
- P. R. China
| | - Mei-Yan Yang
- Key Laboratory of Biomedical Polymers of Ministry of Education
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan
- P. R. China
| | - Chuan-Jun Liu
- Key Laboratory of Biomedical Polymers of Ministry of Education
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan
- P. R. China
| | - Ren-Xi Zhuo
- Key Laboratory of Biomedical Polymers of Ministry of Education
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan
- P. R. China
| |
Collapse
|
25
|
Molecular arrangement of symmetric and non-symmetric triblock copolymers of poly(ethylene oxide) and poly(isobutylene) at the air/water interface. J Colloid Interface Sci 2015; 437:80-89. [PMID: 25313470 DOI: 10.1016/j.jcis.2014.09.050] [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: 07/27/2014] [Revised: 09/12/2014] [Accepted: 09/15/2014] [Indexed: 12/16/2022]
Abstract
The behavior of a series of amphiphilic triblock copolymers of poly(ethylene oxide) (PEO) and poly(isobutylene) (PIB); including both symmetric (same degree of polymerization (DP) of the terminal PEO blocks) PEOm-b-PIBn-b-PEOm and non-symmetric (different DP of the terminal PEO blocks) PEOm-b-PIBn-b-PEOz, is investigated at the air/water interface by measuring surface pressure vs mean molecular area isotherms (π vs mmA), Langmuir-Blodgett (LB) technique, and infrared reflection-absorption spectroscopy (IRRAS). The block copolymer (PEO32-b-PIB160-b-PEO32) with longer PEO segments forms a stable monolayer and the isotherm reveals a pseudo-plateau starting at π∼5.7 mN/m, also observed in the IRRAS, which is assigned to the pancake-to-brush transition related to the PEO dissolution into the subphase and subsequent PEO brush dehydration. Another plateau is observed at π∼40 mN/m, which is attributed to the film collapse due to multilayer formation. The pancake-to-brush transition could not be observed for samples with smaller PEO chains. The isotherms for block copolymers, with short PEO chains, both symmetric (PEO3-b-PIBn-b-PEO3) and non-symmetric (PEO12-b-PIBn-b-PEO3), reveal another transition at π∼20-25 mN/m. This is interpreted to be due to the conformational transition from a folded state where the middle PIB block is anchored to the water surface at both ends by the terminal hydrophilic segments to an unfolded state with PIB anchored to the water surface at one end. It is assumed that this transition involves the removal of PEO3 chains from the water surface in case of non-symmetric PEO12-b-PIB85-b-PEO3 and in case of symmetric, probably one PEO3 of each PEO3-b-PIB85-b-PEO3 chain. Because of the weaker interaction of the short PEO3 chains with the water surface as compared with the relatively longer PEO12 chains, the film of PEO3-b-PIB85-b-PEO3 collapses at much lower surface pressure after the transition as compared with the PEO12-b-PIB85-b-PEO3. The AFM images reveal the formation of microdomains of almost uniform height (6-7 nm) in LB films of PEO3-b-PIB85-b-PEO3 and PEO12-b-PIB85-b-PEO3 after transferring onto silicon surfaces. These domains are assumed to be the mesomorphic domains of ordered and folded PIB chains.
Collapse
|
26
|
Cho H, Jaworski J. Enzyme directed formation of un-natural side-chains for covalent surface attachment of proteins. Colloids Surf B Biointerfaces 2014; 122:846-850. [DOI: 10.1016/j.colsurfb.2014.08.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 07/09/2014] [Accepted: 08/12/2014] [Indexed: 12/14/2022]
|
27
|
Kerstetter JL, Gramlich WM. Nanometer-scale self-assembly of amphiphilic copolymers to control and prevent biofouling. J Mater Chem B 2014; 2:8043-8052. [DOI: 10.1039/c4tb00961d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
28
|
Liu X, Yuan L, Li D, Tang Z, Wang Y, Chen G, Chen H, Brash JL. Blood compatible materials: state of the art. J Mater Chem B 2014; 2:5718-5738. [PMID: 32262016 DOI: 10.1039/c4tb00881b] [Citation(s) in RCA: 204] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Devices that function in contact with blood are ubiquitous in clinical medicine and biotechnology. These devices include vascular grafts, coronary stents, heart valves, catheters, hemodialysers, heart-lung bypass systems and many others. Blood contact generally leads to thrombosis (among other adverse outcomes), and no material has yet been developed which remains thrombus-free indefinitely and in all situations: extracorporeally, in the venous circulation and in the arterial circulation. In this article knowledge on blood-material interactions and "thromboresistant" materials is reviewed. Current approaches to the development of thromboresistant materials are discussed including surface passivation; incorporation and/or release of anticoagulants, antiplatelet agents and thrombolytic agents; and mimicry of the vascular endothelium.
Collapse
Affiliation(s)
- Xiaoli Liu
- The Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China.
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Ren T, Mao Z, Moya SE, Gao C. Immobilization of Enzymes on 2-Hydroxyethyl Methacrylate and Glycidyl Methacrylate Copolymer Brushes. Chem Asian J 2014; 9:2132-9. [DOI: 10.1002/asia.201402150] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 04/01/2014] [Indexed: 01/24/2023]
|
30
|
Haraguchi K, Kubota K, Takada T, Mahara S. Highly Protein-Resistant Coatings and Suspension Cell Culture Thereon from Amphiphilic Block Copolymers Prepared by RAFT Polymerization. Biomacromolecules 2014; 15:1992-2003. [DOI: 10.1021/bm401914c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Kazutoshi Haraguchi
- Material Chemistry
Laboratory, Kawamura Institute of Chemical Research, 631 Sakado, Sakura, Chiba, 285-0078, Japan
- Department
of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Izumi-cho, Narashino, Chiba, 275-8575, Japan
| | - Kazuomi Kubota
- Material Chemistry
Laboratory, Kawamura Institute of Chemical Research, 631 Sakado, Sakura, Chiba, 285-0078, Japan
| | - Tetsuo Takada
- Material Chemistry
Laboratory, Kawamura Institute of Chemical Research, 631 Sakado, Sakura, Chiba, 285-0078, Japan
| | - Saori Mahara
- Material Chemistry
Laboratory, Kawamura Institute of Chemical Research, 631 Sakado, Sakura, Chiba, 285-0078, Japan
| |
Collapse
|
31
|
Luan Y, Li D, Wang Y, Liu X, Brash JL, Chen H. 125I-radiolabeling, surface plasmon resonance, and quartz crystal microbalance with dissipation: three tools to compare protein adsorption on surfaces of different wettability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:1029-1035. [PMID: 24393063 DOI: 10.1021/la403498w] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The extent of protein adsorption is an important consideration in the biocompatibility of biomaterials. Various experimental methods can be used to determine the quantity of protein adsorbed, but the results usually differ. In the present work, self-assembled monolayers (SAMs) were used to prepare a series of model gold surfaces varying systematically in water wettability, from hydrophilic to hydrophobic. Three commonly used methods, namely, surface plasmon resonance (SPR), quartz crystal microbalance with dissipation (QCM-D), and (125)I-radiolabeling, were employed to quantify fibrinogen (Fg) adsorption on these surfaces. This approach allows a direct comparison of the mass of Fg adsorbed using these three techniques. The results from all three methods showed that protein adsorption increases with increasing surface hydrophobicity. The increase in the mass of Fg adsorbed with increasing surface hydrophobicity in the SPR data was parallel to that from (125)I-radiolabeling, but the absolute values were different and there does not seem to be a "universally congruent" relationship between the two methods for surfaces with varying wettability. For QCM-D, the variation in protein adsorption with wettability was different from that for SPR and radiolabeling. On the more hydrophobic surfaces, QCM-D gave an adsorbed mass much higher than from the two other methods, possibly because QCM-D measures both the adsorbed Fg and its associated water. However, on the more hydrophilic surfaces, the adsorbed mass from QCM-D was slightly greater than that from SPR, and both were smaller than from (125)I-radiolabeling; this was true no matter whether the Sauerbrey equation or the Voigt model was used to convert QCM-D data to adsorbed mass.
Collapse
Affiliation(s)
- Yafei Luan
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , 199 Ren-ai Road, Suzhou 215123, PR China
| | | | | | | | | | | |
Collapse
|
32
|
Lei H, Wang M, Tang Z, Luan Y, Liu W, Song B, Chen H. Control of lysozyme adsorption by pH on surfaces modified with polyampholyte brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:501-508. [PMID: 24377837 DOI: 10.1021/la403781s] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The adsorption of lysozyme is difficult to control by pH because of the relatively high isoelectric point of this protein (11.1). In this article, we demonstrate good control of lysozyme adsorption by pH in the range of 4-10 on silicon surfaces through modification with poly(2-(dimethylamino ethyl) methacrylate)-block-poly(methacrylic acid) (PDMAEMA-b-PMAA) diblock copolymer brushes. We show that the thickness of the outer PMAA block (lPMAA) is critical to the adsorption. When lPMAA was less than 10 nm, adsorption increased with increasing pH, and the difference in adsorption between high and low pH increased with lPMAA. The ratio of adsorption at pH 10 and pH 4 reached values as high as 16.4. When lPMAA was more than 10 nm, the adsorption tendency on the PDMAEMA-b-PMAA diblock copolymer brushes was similar to that on PMAA homopolymer brushes. These results indicate that the combination of PDMAEMA and PMAA gives adsorption behavior reflecting the properties of both polymers. However, if the outer PMAA block is thicker than a critical value, then the protein-resistant effect of the inner PDMAEMA block is screened.
Collapse
Affiliation(s)
- Hongyan Lei
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, PR China
| | | | | | | | | | | | | |
Collapse
|
33
|
Jing B, Wang H, Lin KY, McGinn PJ, Na C, Zhu Y. A facile method to functionalize engineering solid membrane supports for rapid and efficient oil–water separation. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.08.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
34
|
Jun Z, Dan L, Lin Y, Hong C. DIBLOCK COMB-LIKE COPOLYMER MODIFIED SURFACE FOR SELECTIVE ADHESION OF VASCULAR ENDOTHELIAL CELLS. ACTA POLYM SIN 2013. [DOI: 10.3724/sp.j.1105.2013.13017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|