1
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Son K, Uzawa T, Ito Y, Kippin T, Plaxco KW, Fujie T. Survey of oligoethylene glycol-based self-assembled monolayers on electrochemical aptamer-based sensor in biological fluids. Biochem Biophys Res Commun 2023; 668:1-7. [PMID: 37230045 DOI: 10.1016/j.bbrc.2023.05.032] [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: 04/26/2023] [Revised: 04/26/2023] [Accepted: 05/10/2023] [Indexed: 05/27/2023]
Abstract
The ability to monitor levels of endogenous markers and clearance profiles of drugs and their metabolites can improve the quality of biomedical research and precision with which therapies are individualized. Towards this end, electrochemical aptamer-based (EAB) sensors have been developed that support the real-time monitoring of specific analytes in vivo with clinically relevant specificity and sensitivity. A challenge associated with the in vivo deployment of EAB sensors, however, is how to manage the signal drift which, although correctable, ultimately leads to unacceptably low signal-to-noise ratios, limiting the measurement duration. Motivated by the correction of signal drift, in this paper, we have explored the use of oligoethylene glycol (OEG), a widely employed antifouling coating, to reduce the signal drift in EAB sensors. Counter to expectations, however, when challenged in 37 °C whole blood in vitro, EAB sensors employing OEG-modified self-assembled monolayers exhibit both greater drift and reduced signal gain, compared with those employ a simple, hydroxyl-terminated monolayer. On the other hand, when EAB sensor was prepared with a mix monolayer using MCH and lipoamido OEG 2 alcohol, reduced signal noise was observed compared to the same sensor prepared with MCH presumably due to improved SAM construction. These results suggest broader exploration of antifouling materials will be required to improve the signal drift of EAB sensors.
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Affiliation(s)
- Kon Son
- School of Life Science and Technology, Tokyo Institute of Technology, B-50, Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan; RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Takanori Uzawa
- RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan; RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Yoshihiro Ito
- RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan; RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Tod Kippin
- Department of Psychological and Brain Sciences, UCSB, Santa Barbara, CA, 93106, USA
| | - Kevin W Plaxco
- Department of Chemistry and Biochemistry, UCSB, Santa Barbara, CA, 93106, USA
| | - Toshinori Fujie
- School of Life Science and Technology, Tokyo Institute of Technology, B-50, Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan; RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan; Living Systems Materialogy (LiSM) Research Group, International Research Frontiers Initiative (IRFI), Tokyo Institute of Technology, B-50, Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan.
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2
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Wang Z, Lou X. Recent Progress in Functional-Nucleic-Acid-Based Fluorescent Fiber-Optic Evanescent Wave Biosensors. BIOSENSORS 2023; 13:bios13040425. [PMID: 37185500 PMCID: PMC10135899 DOI: 10.3390/bios13040425] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/20/2023] [Accepted: 03/25/2023] [Indexed: 05/17/2023]
Abstract
Biosensors capable of onsite and continuous detection of environmental and food pollutants and biomarkers are highly desired, but only a few sensing platforms meet the "2-SAR" requirements (sensitivity, specificity, affordability, automation, rapidity, and reusability). A fiber optic evanescent wave (FOEW) sensor is an attractive type of portable device that has the advantages of high sensitivity, low cost, good reusability, and long-term stability. By utilizing functional nucleic acids (FNAs) such as aptamers, DNAzymes, and rational designed nucleic acid probes as specific recognition ligands, the FOEW sensor has been demonstrated to be a general sensing platform for the onsite and continuous detection of various targets ranging from small molecules and heavy metal ions to proteins, nucleic acids, and pathogens. In this review, we cover the progress of the fluorescent FNA-based FOEW biosensor since its first report in 1995. We focus on the chemical modification of the optical fiber and the sensing mechanisms for the five above-mentioned types of targets. The challenges and prospects on the isolation of high-quality aptamers, reagent-free detection, long-term stability under application conditions, and high throughput are also included in this review to highlight the future trends for the development of FOEW biosensors capable of onsite and continuous detection.
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Affiliation(s)
- Zheng Wang
- Department of Chemistry, Capital Normal University, Xisanhuan North Road. 105, Beijing 100048, China
| | - Xinhui Lou
- Department of Chemistry, Capital Normal University, Xisanhuan North Road. 105, Beijing 100048, China
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3
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Fan H, Sasaki Y, Zhou Q, Tang W, Nishina Y, Minami T. Non-enzymatic detection of glucose levels in human blood plasma by a graphene oxide-modified organic transistor sensor. Chem Commun (Camb) 2023; 59:2425-2428. [PMID: 36745444 DOI: 10.1039/d2cc07009j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We herein report an organic transistor functionalized with a phenylboronic acid derivative and graphene oxide for the quantification of plasma glucose levels, which has been achieved by the minimization of interferent effects derived from physical protein adsorption on the detection electrode.
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Affiliation(s)
- Haonan Fan
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Yui Sasaki
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Qi Zhou
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Wei Tang
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Yuta Nishina
- Research Core for Interdisciplinary Sciences, Okayama University, Okayama 700-8530, Japan.,Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan.
| | - Tsuyoshi Minami
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
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4
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Zhang X, Bai R, Sun Q, Zhuang Z, Zhang Y, Chen S, Han B. Bio-inspired special wettability in oral antibacterial applications. Front Bioeng Biotechnol 2022; 10:1001616. [PMID: 36110327 PMCID: PMC9468580 DOI: 10.3389/fbioe.2022.1001616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 08/05/2022] [Indexed: 11/13/2022] Open
Abstract
Most oral diseases originate from biofilms whose formation is originated from the adhesion of salivary proteins and pioneer bacteria. Therefore, antimicrobial materials are mainly based on bactericidal methods, most of which have drug resistance and toxicity. Natural antifouling surfaces inspire new antibacterial strategies. The super wettable surfaces of lotus leaves and fish scales prompt design of biomimetic oral materials covered or mixed with super wettable materials to prevent adhesion. Bioinspired slippery surfaces come from pitcher plants, whose porous surfaces are infiltrated with lubricating liquid to form superhydrophobic surfaces to reduce the contact with liquids. It is believed that these new methods could provide promising directions for oral antimicrobial practice, improving antimicrobial efficacy.
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Affiliation(s)
- Xin Zhang
- Department of Orthodontics, School and Hospital of Stomatology, Peking University, Beijing, China
- National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Rushui Bai
- Department of Orthodontics, School and Hospital of Stomatology, Peking University, Beijing, China
- National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Qiannan Sun
- Department of Orthodontics, School and Hospital of Stomatology, Peking University, Beijing, China
- National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Zimeng Zhuang
- Department of Orthodontics, School and Hospital of Stomatology, Peking University, Beijing, China
- National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Yunfan Zhang
- Department of Orthodontics, School and Hospital of Stomatology, Peking University, Beijing, China
- National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
- *Correspondence: Yunfan Zhang, ; Si Chen, ; Bing Han,
| | - Si Chen
- Department of Orthodontics, School and Hospital of Stomatology, Peking University, Beijing, China
- National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
- *Correspondence: Yunfan Zhang, ; Si Chen, ; Bing Han,
| | - Bing Han
- Department of Orthodontics, School and Hospital of Stomatology, Peking University, Beijing, China
- National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
- *Correspondence: Yunfan Zhang, ; Si Chen, ; Bing Han,
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5
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Skoda MWA, Conzelmann NF, Fries MR, Reichart LF, Jacobs RMJ, Zhang F, Schreiber F. Switchable β-lactoglobulin (BLG) adsorption on protein resistant oligo (ethylene glycol) (OEG) self-assembled monolayers (SAMs). J Colloid Interface Sci 2022; 606:1673-1683. [PMID: 34534835 DOI: 10.1016/j.jcis.2021.08.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 07/07/2021] [Accepted: 08/03/2021] [Indexed: 12/16/2022]
Abstract
HYPOTHESIS Although protein adsorption at an interface is very common and important in biology and biotechnology, it is still not fully understood - mainly due to the intricate balance of forces that ultimately control it. In food processing (and medicine), controlling and manipulating protein adsorption, as well as avoiding protein adsorption (biofilm formation or membrane fouling) by the production of protein-resistant surfaces is of substantial interest. A major factor conferring resistance towards protein adsorption to a surface is the presence of tightly bound water molecules, as is the case in oligo ethylene glycol (OEG)-terminated self-assembled monolayers (SAMs). Due to strong attractive protein-protein and protein-surface interactions observed in systems containing trivalent salt ions, we hypothesize that these conditions may lead to a breakdown of protein resistance in OEG SAMs. EXPERIMENTS We studied the adsorption behavior of BLG in the presence of a lanthanum(III) chloride (LaCl3) at concentrations of 0, 0.1, 0.8 and 5.0 mM on normally protein resistant triethylene glycol-termianted (EG3) SAMs on a gold surface. We used quartz-crystal microbalance with dissipation (QCM-D) and neutron reflectivity (NR) to characterize the morphology of the interfacial region of the SAM. FINDINGS We demonstrate that the protein resistance of the EG3 SAM breaks down beyond a threshold salt concentration c∗ and mirrors the bulk behaviour of this system, showing reduced adsorption beyond a second critical salt concentration c∗∗. These results demonstrate for the first time the controlled switching of the protein-resistant properties of this type of SAM by the addition of trivalent salt.
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Affiliation(s)
- Maximilian W A Skoda
- STFC, ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell Campus, Didcot OX11 0QX, UK
| | - Nina F Conzelmann
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, Tübingen 72076, Germany
| | - Madeleine R Fries
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, Tübingen 72076, Germany
| | - Lara F Reichart
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, Tübingen 72076, Germany
| | - Robert M J Jacobs
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, South Parks Road, Oxford OX1 3TA, UK
| | - Fajun Zhang
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, Tübingen 72076, Germany
| | - Frank Schreiber
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, Tübingen 72076, Germany.
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6
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Hinson CM, Bardo AM, Shannon CE, Rivera S, Swaminathan J, Marcotte EM, Anslyn EV. Studies of Surface Preparation for the Fluorosequencing of Peptides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14856-14865. [PMID: 34904833 PMCID: PMC8982273 DOI: 10.1021/acs.langmuir.1c02644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Silica passivating agents have shown great success in minimizing nonspecific protein binding to glass surfaces for imaging and microscopy applications. Amine-derivatized surfaces are commonly used in conjugation with amide coupling agents to immobilize peptides/proteins through C-terminal or side-chain carboxylic acids. In the case of the single-molecule fluorosequencing of peptides, attachment occurs via the C-terminus and nonspecific surface binding has previously been a source of error in peptide identification. Here, we employ fluorosequencing as a high-throughput, single-molecule sensitivity assay to identify and quantify the extent of nonspecific binding of peptides to amine-derivatized surfaces. We show that there is little improvement when using common passivating agents in combination with the surface derivatizing agent 3-aminopropyl-triethoxysilane (APTES) to couple the peptides to the modified surface. Furthermore, many xanthene fluorophores have carboxylic acids in the appended phenyl ring at positions ortho and meta or ortho and para, and the literature shows that conjugation through the ortho position is not favored. Because xanthene-derived fluorophores are commonly used for single-molecule applications, we devised a novel assay to probe the conjugation of peptides via their fluorophores relative to their C-termini on silane-derivatized surfaces. We find significant attachment to the ortho position, which is a warning to those attempting to immobilize fluorophore-labeled peptides to silica surfaces via amide coupling agents. However, eliminating all amines on the surface by switching to 3-azidopropyl-triethoxysilane (AzTES) for coupling via copper-catalyzed azide-alkyne cycloaddition (CuAAC) and omitting additional passivation agents allowed us to achieve a high level of C-terminally bound peptides relative to nonspecifically or ortho-phenyl-bound, fluorophore-labeled peptides. This strategy substantially improves the specificity of peptide immobilization for single-molecule fluorosequencing experiments.
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7
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Wang Y, Zhang B, Dodiuk H, Kenig S, Barry C, Ratto J, Mead J, Jia Z, Turkoglu S, Zhang J. Effect of Protein Adsorption on Air Plastron Behavior of a Superhydrophobic Surface. ACS APPLIED MATERIALS & INTERFACES 2021; 13:58096-58103. [PMID: 34813281 DOI: 10.1021/acsami.1c15981] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Protein fouling on critical biointerfaces causes significant public health and clinical ramifications. Multiple strategies, including superhydrophobic (SHP) surfaces and coatings, have been explored to mitigate protein adsorption on solid surfaces. SHP materials with underwater air plastron (AP) layers hold great promise by physically reducing the contact area between a substrate and protein molecules. However, sustaining AP stability or lifetime is crucial in determining the durability and long-term applications of SHP materials. This work investigated the effect of protein on the AP stability using model SHP substrates, which were prepared from a mixture of silica nanoparticles and epoxy. The AP stability was determined using a submersion test with real-time visualization. The results showed that AP stability was significantly weakened by protein solutions compared to water, which could be attributed to the surface tension of protein solutions and protein adsorption on SHP substrates. The results were further examined to reveal the correlation between protein fouling and accelerated AP dissipation on SHP materials by confocal fluorescent imaging, surface energy measurement, and surface robustness modeling of the Cassie-Baxter to Wenzel transition. The study reveals fundamental protein adsorption mechanisms on SHP materials, which could guide future SHP material design to better mitigate protein fouling on critical biointerfaces.
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Affiliation(s)
- Yujie Wang
- Department of Plastics Engineering, University of Massachusetts, Lowell, Massachusetts 01854, United States
- Biomedical Engineering & Biotechnology Program, University of Massachusetts, Lowell, Massachusetts 01854, United States
| | - Boce Zhang
- Department of Food Science and Human Nutrition, University of Florida, Gainesville, Florida 32611, United States
| | - Hanna Dodiuk
- Department of Plastics Engineering, University of Massachusetts, Lowell, Massachusetts 01854, United States
- Polymer Materials Engineering Department, The Pernick Faculty of Engineering, Shenkar College of Engineering Design and Art, Ramat Gan 5211401, Israel
| | - Shmuel Kenig
- Department of Plastics Engineering, University of Massachusetts, Lowell, Massachusetts 01854, United States
- Polymer Materials Engineering Department, The Pernick Faculty of Engineering, Shenkar College of Engineering Design and Art, Ramat Gan 5211401, Israel
| | - Carol Barry
- Department of Plastics Engineering, University of Massachusetts, Lowell, Massachusetts 01854, United States
| | - JoAnn Ratto
- The U.S. Army, Combat Capabilities Development Command - Soldier Center (DEVCOM Soldier Center), Natick, Massachusetts 01760, United States
| | - Joey Mead
- Department of Plastics Engineering, University of Massachusetts, Lowell, Massachusetts 01854, United States
| | - Zhen Jia
- Department of Food Science and Human Nutrition, University of Florida, Gainesville, Florida 32611, United States
| | - Sevil Turkoglu
- Department of Plastics Engineering, University of Massachusetts, Lowell, Massachusetts 01854, United States
| | - Jinde Zhang
- Department of Plastics Engineering, University of Massachusetts, Lowell, Massachusetts 01854, United States
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8
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Suriboot J, Marmo AC, Ngo BKD, Nigam A, Ortiz-Acosta D, Tai BL, Grunlan MA. Amphiphilic, thixotropic additives for extrusion-based 3D printing of silica-reinforced silicone. SOFT MATTER 2021; 17:4133-4142. [PMID: 33735370 DOI: 10.1039/d1sm00288k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The ability to utilize extrusion-based, direct ink write (DIW) 3D printing to create silica-reinforced silicones with complex structures could expand their utility in industrial and biomedical applications. Sylgard 184, a common Pt-cure silicone, lacks the thixotropic behavior necessary for effective printing and its hydrophobicity renders cured structures susceptible to biofouling. Herein, we evaluated the efficacy of various PEO-silane amphiphiles (PEO-SAs) as thixotropic and surface modifying additives in Sylgard 184. Eight amphiphilic PEO-SAs of varying architecture (e.g. linear, star, and graft), crosslinkability, and PEO content were evaluated. Modified formulations were also prepared with additional amounts of silica filler, both hexamethyldisilazane (HMDS)-treated and dimethyldichlorosilane (DiMeDi)-treated types. Numerous PEO-SA modified silicone formulations demonstrated effective water-driven surface hydrophilicity that was generally diminished with the addition of HMDS-treated silica filler. While increased yield stress was observed for PEO-SA modified silicones with added HMDS-treated filler, none achieved the initial target for 3D printing (>1000 Pa). Only the formulations containing the DiMeDi-treated filler (17.3 wt%) were able to surpass this value. These formulations were then tested for their thixotropic properties and all surpassed the targets for recovered storage modulus (G') (>1000 Pa) and loss factor (<0.8). In particular, the triblock linear PEO-SA produced exceptionally high recovered G', low loss factor, and substantial water-driven restructuring to form a hydrophilic surface. Combined, these results demonstrate the potential of silicones modified with PEO-SA surface-modifying additives (SMAs) for extrusion-based, DIW 3D printing applications.
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Affiliation(s)
- Jakkrit Suriboot
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Alec C Marmo
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Bryan Khai D Ngo
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Aman Nigam
- Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA
| | | | - Bruce L Tai
- Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Melissa A Grunlan
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA. and Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA and Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
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9
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Sonoda T, Kobayashi S, Tanaka M. Periodically Functionalized Linear Polyethylene with Tertiary Amino Groups via Regioselective Ring-Opening Metathesis Polymerization. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02611] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Toshiki Sonoda
- Department of Chemistry and Biochemistry, Graduate School of Kyushu University, 744 Moto-oka,
Nishi-ku, Fukuoka 819-0395, Japan
| | - Shingo Kobayashi
- Institute for Materials Chemistry and Engineering, Kyushu University, CE41 744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
| | - Masaru Tanaka
- Institute for Materials Chemistry and Engineering, Kyushu University, CE41 744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
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10
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Quiñones-Pérez M, Cieza RJ, Ngo BKD, Grunlan MA, Domenech M. Amphiphilic silicones to reduce the absorption of small hydrophobic molecules. Acta Biomater 2021; 121:339-348. [PMID: 33271355 DOI: 10.1016/j.actbio.2020.11.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 11/23/2020] [Accepted: 11/25/2020] [Indexed: 12/19/2022]
Abstract
Silicones (i.e. crosslinked poly(dimethylsiloxane), PDMS) are commonly used material for microfluidic device fabrication. Nonetheless, due to the uncontrollable absorption of small hydrophobic molecules (<1 kDa) into the bulk, its applicability to cell-based drug assays and sensing applications has been limited. Here, we demonstrate the use of substrates made of silicones bulk modified with a poly(ethylene oxide) silane amphiphile (PEO-SA) to reduce hydrophobic small molecule sequestration for cell-based assays. Modified silicone substrates were generated with concentrations of 2 wt.%, 9 wt.% and, 14 wt.% PEO-SA. Incorporation of PEO-SA into the silicone bulk was assessed by FTIR analysis in addition to water contact angle analysis to evaluate surface hydrophobicity. Cell toxicity, absorption of small hydrophobic drugs, and cell response to hydrophobic molecules were also evaluated. Results showed that the incorporation of the PEO-SA into the silicone led to a reduction in water contact angle from 114° to as low as 16° that was stable for at least three months. The modified silicones showed viability values above 85% for NIH-3T3, MCF7, MDA-MB-468, and MDA-MB-231 cell lines. A drug response assay using tamoxifen and the MCF7 cell line showed full recovery of cell toxicity response when exposed to PDMS modified with 9 wt.% or 14 wt.% PEO-SA compared to tissue culture plastic. Therefore, our study supports the use of PEO-SA at concentrations of 9 wt.% or higher for enhanced surface wettability and reduced absorption of small hydrophobic molecules in PDMS-based platforms.
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Affiliation(s)
- Manuel Quiñones-Pérez
- Industrial Biotechnology Program, University of Puerto Rico Mayagüez, PR-108, Mayagüez, PR 00682, Puerto Rico
| | - Ruben J Cieza
- Chemical Engineering Department, University of Puerto Rico Mayagüez, PR-108, Mayagüez, PR 00682, Puerto Rico
| | - Bryan Khai D Ngo
- Department of Biomedical Engineering, Department of Materials Science & Engineering, Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
| | - Melissa A Grunlan
- Department of Biomedical Engineering, Department of Materials Science & Engineering, Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
| | - Maribella Domenech
- Chemical Engineering Department, University of Puerto Rico Mayagüez, PR-108, Mayagüez, PR 00682, Puerto Rico.
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11
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Characterization of a self-assembled monolayer of O-(2-Mercaptoethyl)-O′-methyl-hexa(ethylene glycol) (EG7-SAM) on gold electrodes. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2020.114892] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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12
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Sonoda T, Kobayashi S, Herai K, Tanaka M. Side-Chain Spacing Control of Derivatives of Poly(2-methoxyethyl acrylate): Impact on Hydration States and Antithrombogenicity. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01144] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Toshiki Sonoda
- Department of Applied Molecular Chemistry, Graduate School of Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Shingo Kobayashi
- Institute for Materials Chemistry and Engineering, Kyushu University, CE41 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Keisuke Herai
- Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Masaru Tanaka
- Institute for Materials Chemistry and Engineering, Kyushu University, CE41 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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13
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Liu Y, Zhang D, Ren B, Gong X, Liu A, Chang Y, He Y, Zheng J. Computational Investigation of Antifouling Property of Polyacrylamide Brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2757-2766. [PMID: 32118448 DOI: 10.1021/acs.langmuir.0c00165] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Antifouling materials and coatings have broad fundamental and practical applications. Strong hydration at polymer surfaces has been proven to be responsible for their antifouling property, but molecular details of interfacial water behaviors and their functional roles in protein resistance remain elusive. Here, we computationally studied the packing structure, surface hydration, and protein resistance of four poly(N-hydroxyalkyl acrylamide) (PAMs) brushes with different carbon spacer lengths (CSLs) using a combination of molecular mechanics (MM), Monte Carlo (MC), and molecular dynamics (MD) simulations. The packing structure of different PAM brushes were first determined and served as a structural basis for further exploring the CSL-dependent dynamics and structure of water molecules on PAM brushes and their surface resistance ability to lysozyme protein. Upon determining an optimal packing structure of PAMs by MM and optimal protein orientation on PAMs by MC, MD simulations further revealed that poly(N-hydroxymethyl acrylamide) (pHMAA), poly(N-(2-hydroxyethyl)acrylamide) (pHEAA), and poly(N-(3-hydroxypropyl)acrylamide) (pHPAA) brushes with shorter CSLs = 1-3 possessed a much stronger binding ability to more water molecules than a poly(N-(5-hydroxypentyl)acrylamide) (pHPenAA) brush with CSL = 5. Consequently, CSL-induced strong surface hydration on pHMAA, pHEAA, and pHPAA brushes led to high surface resistance to lysozyme adsorption, in sharp contrast to lysozyme adsorption on the pHPenAA brush. Computational studies confirmed the experimental results of surface wettability and protein adsorption from surface plasmon resonance, contact angle, and sum frequency generation vibrational spectroscopy, highlighting that small structural variation of CSLs can greatly impact surface hydration and antifouling characteristics of antifouling surfaces, which may provide structural-based design guidelines for new and effective antifouling materials and surfaces.
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Affiliation(s)
- Yonglan Liu
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Dong Zhang
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Baiping Ren
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Xiong Gong
- Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Aristo Liu
- Copley High School, Copley, Akron, Ohio 44321, United States
| | - Yung Chang
- Department of Chemical Engineering and R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 320, Taiwan
| | - Yi He
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Jie Zheng
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Akron, Ohio 44325, United States
- Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
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14
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Liu Y, Hu H, Yang X, Lv J, Zhou L, Luo Z. Hydrophilic modification on polyvinyl alcohol membrane by hyaluronic acid. Biomed Mater 2019; 14:055009. [DOI: 10.1088/1748-605x/ab3010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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15
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Yang W, Zhao X. Glutathione-Induced Structural Transform of Double-Cross-Linked PEGylated Nanogel for Efficient Intracellular Anticancer Drug Delivery. Mol Pharm 2019; 16:2826-2837. [PMID: 31063382 DOI: 10.1021/acs.molpharmaceut.9b00467] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A glutathione-sensitive poly[methacrylic acid- co-poly(ethylene glycol) methyl ether methacrylate] (PMAABACy- co-PEGMA) nanogel with tunable stability has been fabricated through covalent and metal double-cross-linking strategies in response to the differential change of GSH concentration between the inside and outside of tumor cells. Herein, the size-controlled PMAA- co-PEGMA that possessed unique core-shell structure was first obtained via adjusting the length of PEGMA. Furthermore, N, N-bis(acryloyl)cystamine was introduced to endow PMAA- co-PEGMA with glutathione-sensitive property. The PMAABACy- co-PEGMA950 nanogel exhibited reasonable particle size and desired hydrodynamic diameter that was further cross-linked by Fe(III) ions to obtain a double-cross-linked PMAABACy/Fe(III)- co-PEGMA950 vehicle. In this double-cross-linked vehicle, the existence of metal cross-linked structure made this vehicle possess favorable structural stability to restrict the premature leakage of therapeutic drug. The introduction of covalent cross-linked structure synchronously imparted the vehicle with glutathione-sensitive property in response to the high intracellular glutathione concentrations in tumor cells to induce its structural transform for realizing the release of drug. Additionally, a series of in vitro evaluations demonstrated that PMAABACy/Fe(III)- co-PEGMA950 displayed remarkable biocompatibility and glutathione-sensitive release toward anticancer drug in the simulated intracellular environment of tumor tissues. Notably, the drug-loaded PMAABACy/Fe(III)- co-PEGMA950 exhibited excellent anticancer activity against tumor cells. The double-cross-linked PMAABACy/Fe(III)- co-PEGMA950 nanogel therefore is expected to be a promising tumor microenvironment-sensitive platform for delivering chemotherapeutic drugs.
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Affiliation(s)
- Wenjing Yang
- Department of Anesthesiology , The First Affiliated Hospital of Zhengzhou University , Zhengzhou 450052 , China
| | - Xubo Zhao
- College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou 450001 , China
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16
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Ngo BKD, Lim KK, Stafslien SJ, Grunlan MA. Stability of silicones modified with PEO-silane amphiphiles: Impact of structure and concentration. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.03.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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Molino PJ, Yang D, Penna M, Miyazawa K, Knowles BR, MacLaughlin S, Fukuma T, Yarovsky I, Higgins MJ. Hydration Layer Structure of Biofouling-Resistant Nanoparticles. ACS NANO 2018; 12:11610-11624. [PMID: 30335960 DOI: 10.1021/acsnano.8b06856] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Hydrophilic surface chemistries can strongly bind water to produce surfaces that are highly resistant to protein adsorption and fouling. The interfacial bound water and its distinct properties have intrigued researchers for decades, yet the relationship between the water three-dimensional structure and function in antifouling coatings remains elusive. Here, we use hydrophilic, epoxy organosilane modified silica nanoparticles to demonstrate cheap, robust, and practically applied coatings that we discover have broad-ranging, ultralow fouling properties when challenged by various proteins, bacteria, and fungal spores. To understand their excellent antifouling properties, frequency modulation-atomic force microscopy is used to directly observe the interfacial water structure at subatomic resolution, which we validate using all-atom molecular dynamic simulations that strikingly predict similar structures of water layers on the original and ultralow fouling surfaces. The convergence of experimental and modeling data reveals that suitably spaced, flexible chains with hydrophilic groups interact with water molecules to produce a connective, quasi-stable layer, consisting of dynamic interfacial water, that provides a basis for antifouling performance of ultrathin, hydrophilic surface chemistries.
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Affiliation(s)
- Paul J Molino
- ARC Industrial Transformation Research Hub for Australian Steel Manufacturing , Wollongong , NSW 2522 , Australia
- ARC Centre for Electromaterials Science (ACES), Intelligent Polymer Research Institute/AIIM Faculty, Innovation Campus, Squires Way , University of Wollongong , Wollongong , NSW 2522 , Australia
| | - Dan Yang
- ARC Industrial Transformation Research Hub for Australian Steel Manufacturing , Wollongong , NSW 2522 , Australia
- ARC Centre for Electromaterials Science (ACES), Intelligent Polymer Research Institute/AIIM Faculty, Innovation Campus, Squires Way , University of Wollongong , Wollongong , NSW 2522 , Australia
| | - Matthew Penna
- ARC Industrial Transformation Research Hub for Australian Steel Manufacturing , Wollongong , NSW 2522 , Australia
- School of Engineering , RMIT University , Melbourne , Victoria 3001 , Australia
| | - Keisuke Miyazawa
- Division of Electronic Engineering and Computer Science and ∞Nano Life Science Institute (WPI-NanoLSI) , Kanazawa University , Kakuma-machi, Kanazawa 920-1192 , Japan
| | - Brianna R Knowles
- ARC Industrial Transformation Research Hub for Australian Steel Manufacturing , Wollongong , NSW 2522 , Australia
- BlueScope Innovation Laboratories , Old Port Road , Port Kembla , NSW 2505 , Australia
| | - Shane MacLaughlin
- ARC Industrial Transformation Research Hub for Australian Steel Manufacturing , Wollongong , NSW 2522 , Australia
- BlueScope Innovation Laboratories , Old Port Road , Port Kembla , NSW 2505 , Australia
| | - Takeshi Fukuma
- Division of Electronic Engineering and Computer Science and ∞Nano Life Science Institute (WPI-NanoLSI) , Kanazawa University , Kakuma-machi, Kanazawa 920-1192 , Japan
| | - Irene Yarovsky
- ARC Industrial Transformation Research Hub for Australian Steel Manufacturing , Wollongong , NSW 2522 , Australia
- School of Engineering , RMIT University , Melbourne , Victoria 3001 , Australia
| | - Michael J Higgins
- ARC Industrial Transformation Research Hub for Australian Steel Manufacturing , Wollongong , NSW 2522 , Australia
- ARC Centre for Electromaterials Science (ACES), Intelligent Polymer Research Institute/AIIM Faculty, Innovation Campus, Squires Way , University of Wollongong , Wollongong , NSW 2522 , Australia
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18
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Chang R, Asatyas S, Lkhamsuren G, Hirohara M, Mondarte EAQ, Suthiwanich K, Sekine T, Hayashi T. Water near bioinert self-assembled monolayers. Polym J 2018. [DOI: 10.1038/s41428-018-0075-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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19
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Zhao X, Tian K, Zhou T, Jia X, Li J, Liu P. PEGylated multi-walled carbon nanotubes as versatile vector for tumor-specific intracellular triggered release with enhanced anti-cancer efficiency: Optimization of length and PEGylation degree. Colloids Surf B Biointerfaces 2018; 168:43-49. [PMID: 29482875 DOI: 10.1016/j.colsurfb.2018.02.041] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/06/2018] [Accepted: 02/17/2018] [Indexed: 01/17/2023]
Abstract
PEGylated multi-walled carbon nanotubes (PEG-MWCNTs) were optimized as versatile vector for tumor-specific intracellular triggered release of doxorubicin (DOX), based on the effect of their length and PEGylation degree on the cytotoxicity and DOX-loading capacity. The length and surface carboxyl groups of the carboxylated multi-walled carbon nanotubes (CMWCNTs) were easily tailored by adjusting the oxidation time. The longer CMWCNTs or those with high carboxyl group content showed obvious cytotoxicity, while the PEG-MWCNTs ≤ 300 nm showed better cytocompatibility. The PEG-MWCNTs-3 of about 300 nm was selected as drug delivery vector, possessing a high drug-loading capacity of 0.55 mg/mg. They released DOX rapidly under lower pH media mimicking the tumor microenvironment with cumulative release of 57% within 24 h, while the premature leakage under the simulated physiological condition was only 10%. The WST-1 assays demonstrated the DOX-loaded PEG-MWCNTs-3 exhibited the enhanced inhibitory efficiency against HepG2 cells, in comparison with free DOX.
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Affiliation(s)
- Xubo Zhao
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Kun Tian
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Tingting Zhou
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Xu Jia
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Jiagen Li
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Peng Liu
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
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20
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Jiang N, Sen M, Zeng W, Chen Z, Cheung JM, Morimitsu Y, Endoh MK, Koga T, Fukuto M, Yuan G, Satija SK, Carrillo JMY, Sumpter BG. Structure-induced switching of interpolymer adhesion at a solid-polymer melt interface. SOFT MATTER 2018; 14:1108-1119. [PMID: 29340434 DOI: 10.1039/c7sm02279d] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Here we report a link between the interfacial structure and adhesive property of homopolymer chains physically adsorbed (i.e., via physisorption) onto solids. Polyethylene oxide (PEO) was used as a model and two different chain conformations of the adsorbed polymer were created on silicon substrates via the well-established Guiselin's approach: "flattened chains" which lie flat on the solid and are densely packed, and "loosely adsorbed polymer chains" which form bridges jointing up nearby empty sites on the solid surface and cover the flattened chains. We investigated the adhesion properties of the two different adsorbed chains using a custom-built adhesion testing device. Bilayers of a thick PEO overlayer on top of the flattened chains or loosely adsorbed chains were subjected to the adhesion test. The results revealed that the flattened chains do not show any adhesion even with the chemically identical free polymer on top, while the loosely adsorbed chains exhibit adhesion. Neutron reflectivity experiments corroborated that the difference in the interfacial adhesion is not attributed to the interfacial brodening at the free polymer-adsorbed polymer interface. Instead, coarse-grained molecular dynamics simulation results suggest that the tail parts of the loosely adsorbed chains act as "connector molecules", bridging the free chains and substrate surface and improving the interfacial adhesion. These findings not only shed light on the structure-property relationship at the interface, but also provide a novel approach for developing sticking/anti-sticking technologies through precise control of the interfacial polymer nanostructures.
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Affiliation(s)
- Naisheng Jiang
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794-2275, USA.
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21
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Ozkan AD, Topal AE, Dikecoglu FB, Guler MO, Dana A, Tekinay AB. Probe microscopy methods and applications in imaging of biological materials. Semin Cell Dev Biol 2018; 73:153-164. [DOI: 10.1016/j.semcdb.2017.08.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 08/04/2017] [Accepted: 08/04/2017] [Indexed: 01/21/2023]
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22
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Hawkins ML, Schott SS, Grigoryan B, Rufin MA, Ngo BKD, Vanderwal L, Stafslien SJ, Grunlan MA. Anti-protein and anti-bacterial behavior of amphiphilic silicones. Polym Chem 2017; 8:5239-5251. [PMID: 29104619 PMCID: PMC5667680 DOI: 10.1039/c7py00944e] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silicones with improved water-driven surface hydrophilicity and anti-biofouling behavior were achieved when bulk-modified with poly(ethylene oxide) (PEO) -silane amphiphiles of varying siloxane tether length: α-(EtO)3Si-(CH2)2-oligodimethylsiloxane m -block-poly(ethylene oxide)8-OCH3 (m = 0, 4, 13, 17, 24, and 30). A PEO8-silane [α-(EtO)3Si-(CH2)3-PEO8-OCH3] served as a conventional PEO-silane control. To examine anti-biofouling behavior in the absence versus presence of water-driven surface restructuring, the amphiphiles and control were surface-grafted onto silicon wafers and used to bulk-modify a medical-grade silicone, respectively. While the surface-grafted PEO-control exhibited superior protein resistance, it failed to appreciably restructure to the surface-water interface of bulk-modified silicone and thus led to poor protein resistance. In contrast, the PEO-silane amphiphiles, while less protein-resistant when surface-grafted onto silicon wafers, rapidly and substantially restructured in bulk-modified silicone, exhibiting superior hydrophilicity and protein resistance. A reduction of biofilm for several strains of bacteria and a fungus was observed for silicones modified with PEO-silane amphiphiles. Longer siloxane tethers maintained surface restructuring and protein resistance while displaying the added benefit of increased transparency.
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Affiliation(s)
- Melissa L Hawkins
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120
| | - Samantha S Schott
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120
| | - Bagrat Grigoryan
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120
| | - Marc A Rufin
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120
| | - Bryan Khai D Ngo
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120
| | - Lyndsi Vanderwal
- Office of Research & Creative Activity, North Dakota State University, Fargo, ND 58102
| | - Shane J Stafslien
- Office of Research & Creative Activity, North Dakota State University, Fargo, ND 58102
| | - Melissa A Grunlan
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-300
- Center for Remote Health Technologies System, Texas A&M University, College Station, TX 77843-3120
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23
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Seki A, Ishizone T, Oyane A, Yokoyama H. A Segregation and Deprotection Approach for Hydrophilic Surfaces Using Amphiphilic Block Copolymers Possessing Polystyrene and Poly[(tri(ethylene glycol) methacrylate)] Segments. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Akiko Seki
- Department of Chemical Science and Engineering; Tokyo Institute of Technology; 2-12-1-S1-13 Ohokayama Meguro-ku Tokyo 152-8552 Japan
| | - Takashi Ishizone
- Department of Chemical Science and Engineering; Tokyo Institute of Technology; 2-12-1-S1-13 Ohokayama Meguro-ku Tokyo 152-8552 Japan
| | - Ayako Oyane
- Nanomaterials Research Institute; National Institute of Advanced Industrial Science and Technology; Central 5, 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Hideaki Yokoyama
- Department of Advanced Materials Science; Graduate School of Frontier Sciences; The University of Tokyo; 603 Transdisciplinary Sciences Bldg, 5-1-5 Kashiwa-no-ha Kashiwa Chiba 277-8561 Japan
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24
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Sekine T, Asatyas S, Sato C, Morita S, Tanaka M, Hayashi T. Surface force and vibrational spectroscopic analyses of interfacial water molecules in the vicinity of methoxy-tri(ethylene glycol)-terminated monolayers: mechanisms underlying the effect of lateral packing density on bioinertness. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2017; 28:1231-1243. [DOI: 10.1080/09205063.2017.1303120] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Taito Sekine
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Tokyo, Japan
| | - Syifa Asatyas
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Tokyo, Japan
| | - Chikako Sato
- Department of Biochemical Engineering, Yamagata University, Yamagata, Japan
| | - Shigeaki Morita
- Department of Engineering Science, Osaka Electro-Communication University, Osaka, Japan
| | - Masaru Tanaka
- Department of Biochemical Engineering, Yamagata University, Yamagata, Japan
- Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka, Japan
| | - Tomohiro Hayashi
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Tokyo, Japan
- Surface and Interface Science Laboratory, RIKEN, Saitama, Japan
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25
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Rufin MA, Ngo BKD, Barry ME, Page VM, Hawkins ML, Stafslien SJ, Grunlan MA. Antifouling silicones based on surface-modifying additive amphiphiles. GREEN MATERIALS 2017; 5:4-13. [PMID: 31673356 PMCID: PMC6822677 DOI: 10.1680/jgrma.16.00013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Surface modifying additives (SMAs), which may be readily blended into silicones to improve anti-fouling behavior, must have excellent surface migration potential and must not leach into the aqueous environment. In this work, we evaluated the efficacy of a series of poly(ethylene oxide) (PEO)-based SMA amphiphiles which varied in terms of crosslinkability, siloxane tether length (m) and diblock versus triblock architectures. Specifically, crosslinkable, diblock PEO-silane amphiphiles with two oligodimethylsiloxane (ODMS) tether lengths [(EtO)3Si-(CH2)3-ODMS m -PEO8, m = 13 and 30] were compared to analogous non-crosslinkable, diblock (H-Si-ODMS m -PEO8) and triblock (PEO8-ODMS m -PEO8) SMAs. Prior to water conditioning, while all modified silicone coatings exhibited a high degree of water-driven surface restructuring, that prepared with the non-crosslinkable diblock SMA (m = 13) was the most hydrophilic. After conditioning, all modified silicone coatings were similarly hydrophilic and remained highly protein resistant, with the exception of PEO8-ODMS 30 -PEO8. Notably, despite twice the PEO content, triblock SMAs were not superior to diblock SMAs. For diblock SMAs, it was shown that water uptake and leaching were also similar whether or not the SMA was crosslinkable.
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Affiliation(s)
- Marc A Rufin
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Bryan Khai D Ngo
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Mikayla E Barry
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Vanessa M Page
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Melissa L Hawkins
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Shane J Stafslien
- Center for Nanoscale Science and Engineering, North Dakota State University, Fargo, ND, USA
| | - Melissa A Grunlan
- Department of Biomedical Engineering and Department of Materials Science and Engineering, Texas A&M University, College Station, TX, USA, 5030 Emerging Technologies Building, College Station, TX 77843-3120
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26
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Chinwangso P, Lee HJ, Jamison AC, Marquez MD, Park CS, Lee TR. Structure, Wettability, and Thermal Stability of Organic Thin-Films on Gold Generated from the Molecular Self-Assembly of Unsymmetrical Oligo(ethylene glycol) Spiroalkanedithiols. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:1751-1762. [PMID: 28107018 DOI: 10.1021/acs.langmuir.6b03803] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Organic thin-films on gold were prepared from a set of new, custom-designed bidentate alkanethiols possessing a mixture of normal alkane and methoxy-terminated tri(ethylene glycol) chains. The new unsymmetrical spiroalkanedithiol adsorbates were of the form [CH3O(CH2CH2O)3(CH2)5]-[CH3(CH2)n+1]C[CH2SH]2 where n = 3 and 14; designated EG3C7-C7 and EG3C7-C18, respectively. Their corresponding self-assembled monolayers (SAMs) on gold were characterized and compared with monothiol SAMs derived from an analogous normal alkanethiol (C18SH) and an alkanethiol terminated with an oligo(ethylene glycol) (OEG) moiety (i.e., EG3C7SH). Ellipsometric data revealed reduced film thicknesses for the double-chained dithiolate SAMs, which perhaps arose from the phase-incompatible merger of a hydrocarbon chain with an OEG moiety, contributing to disorder in the films and/or an increase in chain tilt. The comparable wettabilities of the SAMs derived from EG3C7SH and EG3C7-C7, using water as the contacting liquid, are consistent with exposure of the OEG moieties at both interfaces, whereas the lower wettability of the SAM derived from EG3C7-C18 is consistent with exposure of hydrocarbon chains at the interface. The data collected by X-ray photoelectron spectroscopy confirmed the formation of the new OEG-terminated dithiolate SAMs, and also revealed them as less densely packed monolayers due in part to the large molecular cross section of the OEG moieties and to their double-chained structure with dual surface bonds. Mixed SAMs formed from pairs of monothiols having chain compositions analogous to those of the chains of the new dithiols showed that an EG3C7SH/heptanethiol-mixed SAM and the EG3C7-C7 SAM produced almost identical characterization data, revealing the favorable film formation dynamics for adsorbate structures where the alkyl chains can assemble beneath the phase-incompatible OEG termini. For the mixed SAM formed from EG3C7SH/C18SH, the data indicate that the EG3C7SH component failed to incorporate in the film, demonstrating that the blending of phase-incompatible chains is sometimes best accomplished when both chains exist on a single adsorbate structure. Furthermore, the results of solution-phase thermal desorption tests revealed that the OEG-terminated films generated from the bidentate EG3C7-C7 and EG3C7-C18 adsorbates exhibit enhanced thermal stability when compared to the film generated from monodentate EG3C7SH. In a brief study of protein adsorption, the multicomponent SAMs showed a greater ability to resist the adsorption of fibrinogen on their surfaces when compared to the SAM derived from C18SH, but not better than the monolayer derived from EG3C7SH.
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Affiliation(s)
- Pawilai Chinwangso
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
| | - Han Ju Lee
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
| | - Andrew C Jamison
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
| | - Maria D Marquez
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
| | - Chul Soon Park
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
| | - T Randall Lee
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
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27
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Pan HM, Yu H, Guigas G, Fery A, Weiss M, Patzel V, Trau D. Engineering and Design of Polymeric Shells: Inwards Interweaving Polymers as Multilayer Nanofilm, Immobilization Matrix, or Chromatography Resins. ACS APPLIED MATERIALS & INTERFACES 2017; 9:5447-5456. [PMID: 28054761 DOI: 10.1021/acsami.6b13545] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Hydrogels with complex internal structures are required for advanced drug delivery systems and tissue engineering or used as inks for 3D printing. However, hydrogels lack the tunability and diversity of polymeric shells and require complicated postsynthesis steps to alter its structure or properties. We report on the first integrated approach to assemble and design polymeric shells to take on various complex structures and functions such as multilayer nanofilms, multidensity immobilization matrix, or multiadhesive chromatography resins via the tuning of four assembly parameters: (a) poly(allylamine) (PA) concentration, (b) number of poly(allylamine)/poly(styrenesulfonic acid) (PA/PSSA) incubations, (c) poly(allylamine) (PA) to poly(ethylene glycol) (PEG) grafting ratio, and (d) % H2O present during assembly. Our approach combines the complex 3D structures of hydrogels with the versatility of self-assembled polymeric layers. Polymeric shells produced from our method have a highly uniform material distribution and well-defined shell boundaries. Shell thickness, density, and adhesive properties are easily tunable. By virtue of such unique material features, we demonstrate that polymeric shells can be designed to expand beyond its conventional function as thin films and serve as immobilization matrix, chromatography resins, or even reaction compartments. This technique could also uncover interesting perspectives in the development of novel multimaterials for 3D printing to synthesize scaffolds at a higher order of complexity.
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Affiliation(s)
- Houwen Matthew Pan
- Department of Biomedical Engineering, National University of Singapore , 4 Engineering Drive 3, 117583, Singapore
| | - Han Yu
- Department of Microbiology & Immunology, Yong Loo Lin School of Medicine, National University of Singapore , 5 Science Drive 2, 117597, Singapore
| | - Gernot Guigas
- Experimental Physics I, University of Bayreuth , 95440 Bayreuth, Germany
| | - Andreas Fery
- Leibniz Institut für Polymerforschung Dresden e.V. , Hohe Strasse 6, 01069 Dresden, Germany
| | - Matthias Weiss
- Experimental Physics I, University of Bayreuth , 95440 Bayreuth, Germany
| | - Volker Patzel
- Department of Microbiology & Immunology, Yong Loo Lin School of Medicine, National University of Singapore , 5 Science Drive 2, 117597, Singapore
| | - Dieter Trau
- Department of Biomedical Engineering, National University of Singapore , 4 Engineering Drive 3, 117583, Singapore
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28
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Dehghani ES, Spencer ND, Ramakrishna SN, Benetti EM. Crosslinking Polymer Brushes with Ethylene Glycol-Containing Segments: Influence on Physicochemical and Antifouling Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:10317-10327. [PMID: 27642809 DOI: 10.1021/acs.langmuir.6b02958] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The introduction of different types and concentrations of crosslinks within poly(hydroxyethyl methacrylate) (PHEMA) brushes influences their interfacial, physicochemical properties, ultimately governing their adsorption of proteins. PHEMA brushes and brush-hydrogels were synthesized by surface-initiated, atom-transfer radical polymerization (SI-ATRP) from HEMA, with and without the addition of di(ethylene glycol) dimethacrylate (DEGDMA) or tetra(ethylene glycol) dimethacrylate (TEGDMA) as crosslinkers. Linear (pure PHEMA) brushes show high hydration and low modulus and additionally provide an efficient barrier against nonspecific protein adsorption. In contrast, brush-hydrogels are stiffer and less hydrated, and the presence of crosslinks affects the entropy-driven, conformational barrier that hinders the surface interaction of biomolecules with brushes. This leads to the physisorption of proteins at low concentrations of short crosslinks. At higher contents of DEGDMA or in the presence of longer TEGDMA-based crosslinks, brush-hydrogels recover their antifouling properties due to the increase in interfacial water association by the higher concentration of ethylene glycol (EG) units.
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Affiliation(s)
- Ella S Dehghani
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland
| | - Nicholas D Spencer
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland
| | - Shivaprakash N Ramakrishna
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland
| | - Edmondo M Benetti
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland
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29
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Bastien E, Schneider R, Hackbarth S, Dumas D, Jasniewski J, Röder B, Bezdetnaya L, Lassalle HP. PAMAM G4.5-chlorin e6 dendrimeric nanoparticles for enhanced photodynamic effects. Photochem Photobiol Sci 2016; 14:2203-12. [PMID: 26496965 DOI: 10.1039/c5pp00274e] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
There is currently great interest in the development of efficient and specific carrier delivery platforms for systemic photodynamic therapy. Therefore, we aimed to develop covalent conjugates between the photosensitizer chlorin e6 (Ce6) and PAMAM G4.5 dendrimers. Singlet oxygen generation (SOG) efficiency and fluorescence emission were moderately affected by the covalent binding of the Ce6 to the dendrimer. Compared to free Ce6, PAMAM anchored Ce6 displays a much higher photodynamic effect, which is ascribable to better internalization in a tumor cell model. Intracellular fate and internalization pathway of our different compounds were investigated using specific inhibition conditions and confocal fluorescence microscopy. Free Ce6 was shown to enter the cells by a simple diffusion mechanism, while G4.5-Ce6-PEG internalization was dependent on the caveolae pathway, whereas G4.5-Ce6 was subjected to the clathrin-mediated endocytosis pathway. Subcellular localization of PAMAM anchored Ce6, PEGylated or not, was very similar suggesting that the nanoparticles behave similarly in the cells. As a conclusion, we have demonstrated that PEGylated G4.5 PAMAM-Ce6 dendrimers may offer effective biocompatible nanoparticles for improved photodynamic treatment in a preclinical tumor model.
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Affiliation(s)
- Estelle Bastien
- Université de Lorraine, Centre de Recherche en Automatique de Nancy, Campus Sciences, Vandœuvre-lès-Nancy, France. and Centre National de la Recherche Scientifique, Centre de Recherche en Automatique de Nancy, France
| | - Raphaël Schneider
- Université de Lorraine, Laboratoire Réactions et Génie des Procédés (LRGP), UMR 7274, CNRS, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - Steffen Hackbarth
- Institut für Physik, Humboldt, Universität zu Berlin, Newtonstrasse, Berlin, Germany
| | - Dominique Dumas
- Université de Lorraine, Plateforme IBISA d'Imagerie et de Biophysique Cellulaire de Nancy, IMOPA7365, FR3209 BMCT, Centre National de la Recherche Scientifique, Vandœuvre-lès-Nancy, France
| | - Jordane Jasniewski
- Université de Lorraine, Laboratoire d'ingénierie des biomolécues (LIBio), 2 avenue de la Forêt de Haye, Vandœuvre-lès-Nancy, France
| | - Beate Röder
- Institut für Physik, Humboldt, Universität zu Berlin, Newtonstrasse, Berlin, Germany
| | - Lina Bezdetnaya
- Université de Lorraine, Centre de Recherche en Automatique de Nancy, Campus Sciences, Vandœuvre-lès-Nancy, France. and Centre National de la Recherche Scientifique, Centre de Recherche en Automatique de Nancy, France
| | - Henri-Pierre Lassalle
- Université de Lorraine, Centre de Recherche en Automatique de Nancy, Campus Sciences, Vandœuvre-lès-Nancy, France. and Centre National de la Recherche Scientifique, Centre de Recherche en Automatique de Nancy, France
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30
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Falde EJ, Yohe ST, Colson YL, Grinstaff MW. Superhydrophobic materials for biomedical applications. Biomaterials 2016; 104:87-103. [PMID: 27449946 PMCID: PMC5136454 DOI: 10.1016/j.biomaterials.2016.06.050] [Citation(s) in RCA: 191] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Revised: 06/16/2016] [Accepted: 06/20/2016] [Indexed: 12/14/2022]
Abstract
Superhydrophobic surfaces are actively studied across a wide range of applications and industries, and are now finding increased use in the biomedical arena as substrates to control protein adsorption, cellular interaction, and bacterial growth, as well as platforms for drug delivery devices and for diagnostic tools. The commonality in the design of these materials is to create a stable or metastable air layer at the material surface, which lends itself to a number of unique properties. These activities are catalyzing the development of new materials, applications, and fabrication techniques, as well as collaborations across material science, chemistry, engineering, and medicine given the interdisciplinary nature of this work. The review begins with a discussion of superhydrophobicity, and then explores biomedical applications that are utilizing superhydrophobicity in depth including material selection characteristics, in vitro performance, and in vivo performance. General trends are offered for each application in addition to discussion of conflicting data in the literature, and the review concludes with the authors' future perspectives on the utility of superhydrophobic biomaterials for medical applications.
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Affiliation(s)
- Eric J Falde
- Departments of Biomedical Engineering, Chemistry and Medicine, Boston University, 590 Commonwealth Avenue, Boston, MA, 02215, USA
| | - Stefan T Yohe
- Departments of Biomedical Engineering, Chemistry and Medicine, Boston University, 590 Commonwealth Avenue, Boston, MA, 02215, USA
| | - Yolonda L Colson
- Division of Thoracic Surgery, Department of Surgery Brigham and Women's Hospital, Boston, MA, 02115, USA
| | - Mark W Grinstaff
- Departments of Biomedical Engineering, Chemistry and Medicine, Boston University, 590 Commonwealth Avenue, Boston, MA, 02215, USA.
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31
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Estupiñán D, Bannwarth MB, Mylon SE, Landfester K, Muñoz-Espí R, Crespy D. Multifunctional clickable and protein-repellent magnetic silica nanoparticles. NANOSCALE 2016; 8:3019-3030. [PMID: 26781542 DOI: 10.1039/c5nr08258g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Silica nanoparticles are versatile materials whose physicochemical surface properties can be precisely adjusted. Because it is possible to combine several functionalities in a single carrier, silica-based materials are excellent candidates for biomedical applications. However, the functionality of the nanoparticles can get lost upon exposure to biological media due to uncontrolled biomolecule adsorption. Therefore, it is important to develop strategies that reduce non-specific protein-particle interactions without losing the introduced surface functionality. Herein, organosilane chemistry is employed to produce magnetic silica nanoparticles bearing differing amounts of amino and alkene functional groups on their surface as orthogonally addressable chemical functionalities. Simultaneously, a short-chain zwitterion is added to decrease the non-specific adsorption of biomolecules on the nanoparticles surface. The multifunctional particles display reduced protein adsorption after incubation in undiluted fetal bovine serum as well as in single protein solutions (serum albumin and lysozyme). Besides, the particles retain their capacity to selectively react with biomolecules. Thus, they can be covalently bio-functionalized with an antibody by means of orthogonal click reactions. These features make the described multifunctional silica nanoparticles a promising system for the study of surface interactions with biomolecules, targeting, and bio-sensing.
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Affiliation(s)
- Diego Estupiñán
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Markus B Bannwarth
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Steven E Mylon
- Lafayette College, Department of Chemistry, Easton, PA 18042, USA
| | - Katharina Landfester
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Rafael Muñoz-Espí
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany and Institute of Materials Science (ICMUV), University of Valencia, PO Box 22085, 46071 Valencia, Spain.
| | - Daniel Crespy
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany and Vidyasirimedhi Institute of Science and Technology (VISTEC), School of Molecular Science and Engineering, Department of Material Science and Engineering, Rayong, Thailand.
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32
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Shen L, Zhu J. Heterogeneous surfaces to repel proteins. Adv Colloid Interface Sci 2016; 228:40-54. [PMID: 26691416 DOI: 10.1016/j.cis.2015.11.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/06/2015] [Accepted: 11/09/2015] [Indexed: 11/17/2022]
Abstract
The nonspecific adsorption of proteins is usually undesirable on solid surfaces as it induces adverse responses, such as platelet adhesion on medical devices, negative signals of biosensors and contamination blockage of filtration membranes. Thus, an important scheme in material science is to design and fabricate protein-repulsive surfaces. Early approaches in this field focused on homogeneous surfaces comprised of single type functionality. Yet, recent researches have demonstrated that surfaces with heterogeneities (chemistry and topography) show promising performance against protein adsorption. In this review, we will summarize the recent achievements and discuss the new perspectives in the research of developing and characterizing heterogeneous surfaces to repel proteins. The protein repulsion mechanisms of different heterogeneous surfaces will also be discussed in details, followed by the perspective and challenge of this emerging field.
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Affiliation(s)
- Lei Shen
- Key Laboratory for Large-Format Battery Materials and System of the Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Jintao Zhu
- Key Laboratory for Large-Format Battery Materials and System of the Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
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33
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Ren CL, Schlapak R, Hager R, Szleifer I, Howorka S. Molecular and Thermodynamic Factors Explain the Passivation Properties of Poly(ethylene glycol)-Coated Substrate Surfaces against Fluorophore-Labeled DNA Oligonucleotides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:11491-11501. [PMID: 26439134 DOI: 10.1021/acs.langmuir.5b02674] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Poly(ethylene glycol) (PEG) nanofilms are used to avert the nonspecific binding of biomolecules on substrate surfaces in biomedicine and bioanalysis including modern fluorescence-based DNA sensing and sequencing chips. A fundamental and coherent understanding of the interactions between fluorophore-tagged DNA, PEG-films, and substrates in terms of molecular and energetic factors is, however, missing. Here we explore a large parameter space to elucidate how PEG layers passivate metal oxide surfaces against Cy3-labeled DNA probes. The driving force for probe adsorption is found to be the affinity of the fluorophore to the substrate, while the high-quality PEG films prevent adsorption to bare ITO surfaces. The amount of nonrepelled, surface-bound DNA strongly depends on oligonucleotide size, PEG chain length, and incubation temperature. To explain these observations, we develop an experimentally validated theory to provide a microscopic picture of the PEG layer and show that adsorbed DNA molecules reside within the film by end-tethering the fluorophore to the ITO surface. To compensate for the local accumulation of negatively charged DNA, counterions condense on the adsorbed probes within the layer. The model furthermore explains that surface passivation is governed by the interdependence of molecular size, conformation, charge, ion condensation, and environmental conditions. We finally report for the first time on the detailed thermodynamic values that show how adsorption results from a balance between large opposing energetic factors. The insight of our study can be applied to rationally engineer PEG nanolayers for improved functional performance in DNA analysis schemes and may be expanded to other polymeric thin films.
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Affiliation(s)
- Chun-lai Ren
- National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University , Nanjing 210093, China
| | | | - Roland Hager
- Center for Advanced Bioanalysis GmbH, Linz, Austria
| | - Igal Szleifer
- Department of Biomedical Engineering, Department of Chemistry and Chemistry of Life Processes Institute, Northwestern University , Evanston, Illinois 60208, United States
| | - Stefan Howorka
- Center for Advanced Bioanalysis GmbH, Linz, Austria
- Department of Chemistry, Institute of Structural and Molecular Biology, University College London , London, United Kingdom
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34
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Rufin MA, Gruetzner JA, Hurley MJ, Hawkins ML, Raymond ES, Raymond JE, Grunlan MA. Enhancing the protein resistance of silicone via surface-restructuring PEO-silane amphiphiles with variable PEO length. J Mater Chem B 2015; 3:2816-2825. [PMID: 26339488 PMCID: PMC4554761 DOI: 10.1039/c4tb02042a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Silicones with superior protein resistance were produced by bulk-modification with poly(ethylene oxide) (PEO)-silane amphiphiles that demonstrated a higher capacity to restructure to the surface-water interface versus conventional non-amphiphilic PEO-silanes. The PEO-silane amphiphiles were prepared with a single siloxane tether length but variable PEO segment lengths: α-(EtO)3Si(CH2)2-oligodimethylsiloxane13-block-poly(ethylene oxide) n -OCH3 (n = 3, 8, and 16). Conventional PEO-silane analogues (n = 3, 8 and 16) as well as a siloxane tether-silane (i.e. no PEO segment) were prepared as controls. When surface-grafted onto silicon wafer, PEO-silane amphiphiles produced surfaces that were more hydrophobic and thus more adherent towards fibrinogen versus the corresponding PEO-silane. However, when blended into a silicone, PEO-silane amphiphiles exhibited rapid restructuring to the surface-water interface and excellent protein resistance whereas the PEO-silanes did not. Silicones modified with PEO-silane amphiphiles of PEO segment lengths n = 8 and 16 achieved the highest protein resistance.
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Affiliation(s)
- M. A. Rufin
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120
| | - J. A. Gruetzner
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120
| | - M. J. Hurley
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120
| | - M. L. Hawkins
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120
| | - E. S. Raymond
- Department of Neuroscience and Experimental Therapeutics, Texas A&M University, College Station, TX 77843-3120
| | - J. E. Raymond
- Department of Chemistry, Texas A&M University, College Station, TX 77843-3120
| | - M. A. Grunlan
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3120
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35
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Fang J, Yong Q, Zhang K, Sun W, Yan S, Cui L, Yin J. Novel injectable porous poly(γ-benzyl-l-glutamate) microspheres for cartilage tissue engineering: preparation and evaluation. J Mater Chem B 2015; 3:1020-1031. [PMID: 32261981 DOI: 10.1039/c4tb01333f] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel injectable synthetic polypeptide of a poly(γ-benzyl-l-glutamate) macroporous microcarrier was developed for cartilage tissue engineering.
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Affiliation(s)
- Jianjun Fang
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- China
| | - Qi Yong
- Medical Science & Research Center
- Beijing Shijitan Hospital
- Capital Medical University
- Beijing 100038
- P. R. China
| | - Kunxi Zhang
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- China
| | - Wentao Sun
- Medical Science & Research Center
- Beijing Shijitan Hospital
- Capital Medical University
- Beijing 100038
- P. R. China
| | - Shifeng Yan
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- China
| | - Lei Cui
- Medical Science & Research Center
- Beijing Shijitan Hospital
- Capital Medical University
- Beijing 100038
- P. R. China
| | - Jingbo Yin
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- China
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36
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Huang Q, Yoon I, Villanueva J, Kim K, Sirbuly DJ. Quantitative mechanical analysis of thin compressible polymer monolayers on oxide surfaces. SOFT MATTER 2014; 10:8001-8010. [PMID: 25157609 DOI: 10.1039/c4sm01530d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A clear understanding of the mechanical behavior of nanometer thick films on nanostructures, as well as developing versatile approaches to characterize their mechanical properties, are of great importance and may serve as the foundation for understanding and controlling molecular interactions at the interface of nanostructures. Here we report on the synthesis of thin, compressible polyethylene glycol (PEG) monolayers with a wet thickness of <20 nm on tin dioxide (SnO2) nanofibers through silane-based chemistries. Nanomechanical properties of such thin PEG films were extensively investigated using atomic force microscopy (AFM). In addition, tip-sample interactions were carefully studied, with different AFM tip modifications (i.e., hydrophilic and hydrophobic) and in different ionic solutions. We find that the steric forces dominate the tip-sample interactions when the polymer film is immersed in solution with salt concentrations similar to biological media (e.g., 1x phosphate buffer solution), while van der Waals and electrostatic forces have minimal contributions. A Dimitriadis thin film polymer compression model shows that the linear elastic regime is reproducible in the initial 50% indentation of these films which have tunable Young's moduli ranging from 5 MPa for the low molecular weight films to 700 kPa for the high molecular weight PEG films. Results are compared with the same PEG films deposited on silicon substrates which helped quantify the structural properties and understand the relationship between the structural and the mechanical properties of PEG films on the SnO2 fibers.
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Affiliation(s)
- Qian Huang
- Department of NanoEngineering, University of California, La Jolla, San Diego, CA 92093, USA.
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37
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Goel M, Marsh ENG, Chen Z, Abbott NL. Comparison of the influence of humidity and D-mannitol on the organization of tetraethylene glycol-terminated self-assembled monolayers and immobilized antimicrobial peptides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:7143-7151. [PMID: 24854220 DOI: 10.1021/la500926c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report the use of polarization-modulation infrared reflection-absorption spectroscopy (PM-IRRAS) to characterize the effects of relative humidity (RH) and d-mannitol on the conformations of tetraethylene glycol (EG4)-terminated self-assembled monolayers (SAMs) and immobilized antimicrobial peptides (Cecropin P1 and a hybrid of Cecropin A (1-8) and Melittin (1-18)). These results are used to assess the extent to which d-mannitol can substitute for water in promoting conformational states of the SAMs and oligopeptides similar to those induced by hydration. Our measurements reveal a red shift of the COC asymmetric stretching vibration of the EG4-terminated SAMs with increasing humidity, consistent with a transition from a mixed all-trans/helical (7/2 helix) conformation at 0% RH to a predominantly helical conformation at 90% RH. Significantly, under dry conditions, a thin (2 nm in thickness) overlayer of d-mannitol generated the COC spectroscopic signature of the EG4-terminated SAM measured at high humidity. Comparisons of the effects of humidity and d-mannitol on the secondary structure of the two oligopeptides also revealed both to cause the amide I peak positions, which were measured in dry air (and without d-mannitol) to correspond to α-helical conformations, to undergo red-shifts. The magnitudes of the red-shifts, however, were more pronounced for dry d-mannitol than for high RH, with Cecropin P1 and the hybrid peptide exhibiting amide I peak positions under d-mannitol consistent with bulk aqueous solution secondary structures (random and β-sheet, respectively). These results are discussed in the context of prior reports of the tendency of d-mannitol to form glassy states in the absence of water. Overall, the results presented in this paper support the hypothesis that d-mannitol can substitute, in at least some ways, for the influence of water on the conformational states of biologically relevant molecules at interfaces. The results provide guidance for the design of interfaces for water-free biologics.
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Affiliation(s)
- Mohit Goel
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
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38
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Schollbach M, Zhang F, Roosen-Runge F, Skoda MWA, Jacobs RMJ, Schreiber F. Gold nanoparticles decorated with oligo(ethylene glycol) thiols: surface charges and interactions with proteins in solution. J Colloid Interface Sci 2014; 426:31-8. [PMID: 24863761 DOI: 10.1016/j.jcis.2014.03.052] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 03/24/2014] [Accepted: 03/25/2014] [Indexed: 11/30/2022]
Abstract
We have studied oligo(ethylene glycol) (OEG) thiol self-assembled monolayer (SAM) coated gold nanoparticles (AuOEG) and their interactions with proteins in solutions using electrophoretic and dynamic light scattering (ELS and DLS). The results are compared with poly(ethylene glycol) (PEG) thiol coated AuNPs (AuPEG). We show that both AuOEG and AuPEG particles carry a low net negative charge and are very stable (remaining so for more than one year), but long-term aging or dialysis can reduce the stability. If the decorated AuNPs are mixed with bovine serum albumin (BSA), both effective size and zeta-potential of the AuNPs remain unchanged, indicating no adsorption of BSA to the colloid surface. However, when mixed with lysozyme, zeta-potential values increase with protein concentrations and lead to a charge inversion, indicating adsorption of lysozyme to the colloid surface. The colloidal solutions of AuOEG become unstable near zero charge, indicated by a cluster peak in the DLS measurements. The AuPEG solutions show similar charge inversion upon addition of lysozyme, but the solutions are stable under all experimental conditions, presumably because of the strong steric effect of PEG. Washing the protein bound colloids by centrifugation can remove only part of the adsorbed lysozyme molecules indicating that a few proteins adsorb strongly to the colloids. The effective charge inversion and rather strongly bound lysozyme on the colloid surface may suggest that in addition to the charges formed at the SAM-water interface, there are defects on the surface of the colloid, which are accessible to the proteins. The results of this study of surface charge, and stability shed light on the interaction with proteins of SAM coated AuNPs and their applications.
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Affiliation(s)
- Moritz Schollbach
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, D-72076 Tübingen, Germany
| | - Fajun Zhang
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, D-72076 Tübingen, Germany.
| | - Felix Roosen-Runge
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, D-72076 Tübingen, Germany
| | - Maximilian W A Skoda
- STFC, ISIS, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0OX, United Kingdom
| | - Robert M J Jacobs
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road OX1 3TA, United Kingdom
| | - Frank Schreiber
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, D-72076 Tübingen, Germany
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39
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Kuzmyn AR, de los Santos Pereira A, Pop-Georgievski O, Bruns M, Brynda E, Rodriguez-Emmenegger C. Exploiting end group functionalization for the design of antifouling bioactive brushes. Polym Chem 2014. [DOI: 10.1039/c4py00281d] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The Diels–Alder reaction between cyclopentadiene and maleimide is exploited to immobilize proteins on the chain-end of polymer brushes.
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Affiliation(s)
- A. R. Kuzmyn
- Institute of Macromolecular Chemistry
- Academy of Sciences of the Czech Republic
- 162 06 Prague, Czech Republic
| | - A. de los Santos Pereira
- Institute of Macromolecular Chemistry
- Academy of Sciences of the Czech Republic
- 162 06 Prague, Czech Republic
| | - O. Pop-Georgievski
- Institute of Macromolecular Chemistry
- Academy of Sciences of the Czech Republic
- 162 06 Prague, Czech Republic
| | - M. Bruns
- Institute for Applied Materials and Karlsruhe Nano Micro Facility (KNMF)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen, Germany
| | - E. Brynda
- Institute of Macromolecular Chemistry
- Academy of Sciences of the Czech Republic
- 162 06 Prague, Czech Republic
| | - C. Rodriguez-Emmenegger
- Institute of Macromolecular Chemistry
- Academy of Sciences of the Czech Republic
- 162 06 Prague, Czech Republic
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40
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Ueda E, Levkin PA. Micropatterning hydrophobic liquid on a porous polymer surface for long-term selective cell-repellency. Adv Healthc Mater 2013; 2:1425-9. [PMID: 23712893 DOI: 10.1002/adhm.201300073] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Indexed: 11/08/2022]
Abstract
A simple method to form precise micropatterns of hydrophobic liquids using porous hydrophilic-hydrophobic substrates is presented. The micropatterns of hydrophobic liquid exhibit long-term stability, excellent cell-repellency, no cytotoxicity, and are more efficient than conventional PEG or superhydrophobic surfaces in controlling eukaryotic cell adhesion.
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Affiliation(s)
- Erica Ueda
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Postfach 3640, 76021 Karlsruhe, Germany
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41
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Hassert R, Beck-Sickinger AG. Tuning peptide affinity for biofunctionalized surfaces. Eur J Pharm Biopharm 2013; 85:69-77. [DOI: 10.1016/j.ejpb.2013.02.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 02/05/2013] [Accepted: 02/12/2013] [Indexed: 01/16/2023]
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Yang S, Wang B, Cui D, Kerwood D, Wilkens S, Han J, Luk YY. Stereochemical Control of Nonamphiphilic Lyotropic Liquid Crystals: Chiral Nematic Phase of Assemblies Separated by Six Nanometers of Aqueous Solvents. J Phys Chem B 2013; 117:7133-43. [DOI: 10.1021/jp401382h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Sijie Yang
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United
States
| | - Bing Wang
- Novartis Institutes for BioMedical Research, Inc., Cambridge, Massachusetts
02139, United States
| | - Dawei Cui
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United
States
| | - Deborah Kerwood
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United
States
| | - Stephan Wilkens
- Department
of Biochemistry and
Molecular Biology, Upstate Medical University, State University of New York, Syracuse, New York 13210, United
States
| | - Junjie Han
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United
States
| | - Yan-Yeung Luk
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United
States
- Department of Biomedical
and
Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
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43
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Gemmei-Ide M, Motonaga T, Kasai R, Kitano H. Two-Step Recrystallization of Water in Concentrated Aqueous Solution of Poly(ethylene glycol). J Phys Chem B 2013; 117:2188-94. [DOI: 10.1021/jp3102628] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Makoto Gemmei-Ide
- Department of Environmental Applied
Chemistry, Graduate
School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Tetsuya Motonaga
- Department of Environmental Applied
Chemistry, Graduate
School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Ryosuke Kasai
- Department of Environmental Applied
Chemistry, Graduate
School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Hiromi Kitano
- Department of Environmental Applied
Chemistry, Graduate
School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
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Braun HG, Meyer E. Structure Formation of Ultrathin PEO Films at Solid Interfaces—Complex Pattern Formation by Dewetting and Crystallization. Int J Mol Sci 2013; 14:3254-64. [PMID: 23385233 PMCID: PMC3588042 DOI: 10.3390/ijms14023254] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 01/25/2013] [Accepted: 01/28/2013] [Indexed: 11/24/2022] Open
Abstract
The direct contact of ultrathin polymer films with a solid substrate may result in thin film rupture caused by dewetting. With crystallisable polymers such as polyethyleneoxide (PEO), molecular self-assembly into partial ordered lamella structures is studied as an additional source of pattern formation. Morphological features in ultrathin PEO films (thickness < 10 nm) result from an interplay between dewetting patterns and diffusion limited growth pattern of ordered lamella growing within the dewetting areas. Besides structure formation of hydrophilic PEO molecules, n-alkylterminated (hydrophobic) PEO oligomers are investigated with respect to self-organization in ultrathin films. Morphological features characteristic for pure PEO are not changed by the presence of the n-alkylgroups.
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Affiliation(s)
- Hans-Georg Braun
- Max Bergmann Center of Biomaterials, Leibniz Institute of Polymer Research Dresden, Hohe Strasse 6, D-01069 Dresden, Germany.
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Schwierz N, Horinek D, Liese S, Pirzer T, Balzer BN, Hugel T, Netz RR. On the relationship between peptide adsorption resistance and surface contact angle: a combined experimental and simulation single-molecule study. J Am Chem Soc 2012; 134:19628-38. [PMID: 23101566 DOI: 10.1021/ja304462u] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The force-induced desorption of single peptide chains from mixed OH/CH(3)-terminated self-assembled monolayers is studied in closely matched molecular dynamics simulations and atomic force microscopy experiments with the goal to gain microscopic understanding of the transition between peptide adsorption and adsorption resistance as the surface contact angle is varied. In both simulations and experiments, the surfaces become adsorption resistant against hydrophilic as well as hydrophobic peptides when their contact angle decreases below θ ≈ 50°-60°, thus confirming the so-called Berg limit established in the context of protein and cell adsorption. Entropy/enthalpy decomposition of the simulation results reveals that the key discriminator between the adsorption of different residues on a hydrophobic monolayer is of entropic nature and thus is suggested to be linked to the hydrophobic effect. By pushing a polyalanine peptide onto a polar surface, simulations reveal that the peptide adsorption resistance is caused by the strongly bound water hydration layer and characterized by the simultaneous gain of both total entropy in the system and total number of hydrogen bonds between water, peptide, and surface. This mechanistic insight into peptide adsorption resistance might help to refine design principles for anti-fouling surfaces.
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Affiliation(s)
- Nadine Schwierz
- Fachbereich für Physik, Freie Universität Berlin, 14195 Berlin, Germany
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48
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Parisse P, Vindigni A, Scoles G, Casalis L. In Vitro Enzyme Comparative Kinetics: Unwinding of Surface-Bound DNA Nanostructures by RecQ and RecQ1. JOURNAL OF PHYSICAL CHEMISTRY LETTERS 2012; 3:3532-7. [PMID: 26290984 DOI: 10.1021/jz3018682] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Pietro Parisse
- Sincrotrone Trieste S.C.p.A., s.s.14 km163,5 in Area Science Park, Trieste
34149, Italy
| | - Alessandro Vindigni
- Sincrotrone Trieste S.C.p.A., s.s.14 km163,5 in Area Science Park, Trieste
34149, Italy
- International Centre for Genetic Engineering and Biotechnology, Padriciano
99, Trieste 34149, Italy
- Department of Biochemistry and
Molecular Biology, St. Louis University School of Medicine, St. Louis, Missouri 63104, United States
| | - Giacinto Scoles
- Sincrotrone Trieste S.C.p.A., s.s.14 km163,5 in Area Science Park, Trieste
34149, Italy
- Department of Biological and
Medical Science, University of Udine, Ospedale
della Misericordia, Udine 33100, Italy
| | - Loredana Casalis
- Sincrotrone Trieste S.C.p.A., s.s.14 km163,5 in Area Science Park, Trieste
34149, Italy
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49
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Zhao X, Du P, Liu P. Preparation of aggregation-resistant biocompatible superparamagnetic noncovalent hybrid multilayer hollow microspheres for controlled drug release. Mol Pharm 2012; 9:3330-9. [PMID: 22931055 DOI: 10.1021/mp300363g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Biocompatible superparamagnetic polyelectrolyte hybrid hollow microspheres ((CS/Fe(3)O(4)-CA)(3)-CS-NH-CH(2)-PEG) were successfully prepared by PEGylation of multilayered polyelectrolyte hybrid shell encapsulated polystyrene sulfonate (PSS) microsphere templates fabricated by the layer-by-layer self-assembly of chitosan (CS) and citrate modified ferroferric oxide magnetic nanoparticles (Fe(3)O(4)-CA), after etching the templates by dialysis. Their hollow structure with diameter of about 200 nm was confirmed by TEM analysis. The pH and ionic strength responsive properties were retained after the PEGylation of the hollow microspheres. Furthermore, their biocompatibility and stability against aggregation and fusion in media with high ionic strength were distinctly improved. A typical anti-inflammatory drug, ibuprofen, was used for drug loading, and the release behaviors of ibuprofen in a simulated body fluid (SBF) were studied. The results indicate that the biocompatible superparamagnetic polyelectrolyte hybrid hollow microspheres ((CS/Fe(3)O(4)-CA)(3)-CS-NH-CH(2)-PEG) have a high drug loading capacity and favorable release property for ibuprofen; thus, they are very promising for application in drug delivery.
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Affiliation(s)
- Xubo Zhao
- State Key Laboratory of Applied Organic Chemistry and Institute of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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50
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Leung BO, Yang Z, Wu SSH, Chou KC. Role of interfacial water on protein adsorption at cross-linked polyethylene oxide interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:5724-5728. [PMID: 22390193 DOI: 10.1021/la204805x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Sum frequency generation (SFG) vibrational spectroscopy was used to study the structure of water at cross-linked PEO film interfaces in the presence of human serum albumin (HSA) protein. Although PEO is charge neutral, the PEO film/water interface exhibited an SFG signal of water similar to that of a highly charged water/silica interface, signifying the presence of ordered water. Ordered water molecules were observed not only at the water/PEO interface, but also within the PEO film. It indicates that the PEO and water form an ordered hydrogen-bonded network extending from the bulk PEO film into liquid water, which can provide an energy barrier for protein adsorption. Upon exposure to the protein solution, the SFG spectra of water at the water/PEO interface remained nearly unperturbed. For comparison, the SFG spectra of water/silica and water/polystyrene interfaces were also studied with and without HSA in the solution. The SFG spectra of the interfacial water were correlated with the amount of protein adsorbed on the surfaces using fluorescence microscopy, which showed that the amount of protein adsorbed on the PEO film was about 10 times less than that on a polystyrene film and 3 times less than that on silica.
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Affiliation(s)
- Bonnie O Leung
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
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