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Zhong Y, Zhang Y, Lu B, Deng Z, Zhang Z, Wang Q, Zhang J. Hydrogel Loaded with Components for Therapeutic Applications in Hypertrophic Scars and Keloids. Int J Nanomedicine 2024; 19:883-899. [PMID: 38293605 PMCID: PMC10824614 DOI: 10.2147/ijn.s448667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 01/12/2024] [Indexed: 02/01/2024] Open
Abstract
Hypertrophic scars and keloids are common fibroproliferative diseases following injury. Patients with pathologic scars suffer from impaired quality of life and psychological health due to appearance disfiguration, itch, pain, and movement disorders. Recently, the advancement of hydrogels in biomedical fields has brought a variety of novel materials, methods and therapeutic targets for treating hypertrophic scars and keloids, which exhibit broad prospects. This review has summarized current research on hydrogels and loaded components used in preventing and treating hypertrophic scars and keloids. These hydrogels attenuate keloid and hypertrophic scar formation and progression by loading organic chemicals, drugs, or bioactive molecules (such as growth factors, genes, proteins/peptides, and stem cells/exosomes). Among them, smart hydrogels (a very promising method for loading many types of bioactive components) are currently favoured by researchers. In addition, combining hydrogels and current therapy (such as laser or radiation therapy, etc.) could improve the treatment of hypertrophic scars and keloids. Then, the difficulties and limitations of the current research and possible suggestions for improvement are listed. Moreover, we also propose novel strategies for facilitating the construction of target multifunctional hydrogels in the future.
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Affiliation(s)
- Yixiu Zhong
- Department of Dermatology, Shenzhen People’s Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, People’s Republic of China
| | - Youfan Zhang
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, People’s Republic of China
| | - Beibei Lu
- Department of Dermatology, Shenzhen People’s Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, People’s Republic of China
| | - Zhenjun Deng
- Department of Dermatology, Shenzhen People’s Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, People’s Republic of China
| | - Zhiwen Zhang
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, People’s Republic of China
| | - Qi Wang
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, People’s Republic of China
| | - Jianglin Zhang
- Department of Dermatology, Shenzhen People’s Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, People’s Republic of China
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2
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Song M, Yuan M, Jeong S, Bae H. Thickness of hydrogel for nitrifying biomass entrapment determines the free ammonia susceptibility differently in batch and continuous modes. Sci Rep 2023; 13:9353. [PMID: 37291176 PMCID: PMC10250323 DOI: 10.1038/s41598-023-36507-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 06/05/2023] [Indexed: 06/10/2023] Open
Abstract
Hydrogels immobilizing nitrifying bacteria with different thicknesses of 0.55 and 1.13 cm (HG-0.55 and HG-1.13, respectively) were produced. It was recognized that the thickness of media is a crucial parameter that affects both the stability and efficiency of wastewater treatment. Batch mode experiments were conducted to quantify specific oxygen uptake rate (SOUR) values at various total ammonium nitrogen (TAN) concentrations and pH levels. In the batch test, HG-0.55 exhibited 2.4 times higher nitrifying activity than HG-1.13, with corresponding SOUR values of 0.00768 and 0.00317 mg-O2/L mL-PVA min, respectively. However, HG-0.55 was more susceptible to free ammonia (FA) toxicity than HG-1.13, resulting in a reduction of 80% and 50% in SOUR values for HG-0.55 and -1.13, respectively, upon increasing the FA concentration from 15.73 to 118.12 mg-FA/L. Continuous mode experiments were conducted to assess the partial nitritation (PN) efficiency in practical applications, where continuous wastewater inflow maintains low FA toxicity through high ammonia-oxidizing rates. With step-wise TAN concentration increases, HG-0.55 experienced a gentler increase in FA concentration compared to HG-1.13. At a nitrogen loading rate of 0.78-0.95 kg-N/m3 day, the FA increase rate for HG-0.55 was 0.0179 kg-FA/m3 day, while that of HG-1.13 was 0.0516 kg-FA/m3 day. In the batch mode, where wastewater is introduced all at once, the high accumulation of FA posed a disadvantage for the FA-susceptible HG-0.55, which made it unsuitable for application. However, in the continuous mode, the thinner HG-0.55, with its larger surface area and high ammonia oxidation activity, proved to be suitable and demonstrated its effectiveness. This study provides valuable insights and a framework for the utilization strategy of immobilized gels in addressing the toxic effects of FA in practical processes.
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Affiliation(s)
- Minsu Song
- Department of Civil and Environmental Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Meng Yuan
- Department of Civil and Environmental Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Sanghyun Jeong
- Department of Civil and Environmental Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Hyokwan Bae
- Department of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan, 44919, Republic of Korea.
- Graduate School of Carbon Neutrality, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan, 44919, Republic of Korea.
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Zhang J, Li Q, Dai C, Cheng M, Hu X, Kim HS, Yang H, Preston DJ, Li Z, Zhang X, Lee WK. Hydrogel-Based, Dynamically Tunable Plasmonic Metasurfaces with Nanoscale Resolution. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2205057. [PMID: 36269881 DOI: 10.1002/smll.202205057] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/02/2022] [Indexed: 06/16/2023]
Abstract
Flat metasurfaces with subwavelength meta-atoms can be designed to manipulate the electromagnetic parameters of incident light and enable unusual light-matter interactions. Although hydrogel-based metasurfaces have the potential to control optical properties dynamically in response to environmental conditions, the pattern resolution of these surfaces has been limited to microscale features or larger, limiting capabilities at the nanoscale, and precluding effective use in metamaterials. This paper reports a general approach to developing tunable plasmonic metasurfaces with hydrogel meta-atoms at the subwavelength scale. Periodic arrays of hydrogel nanodots with continuously tunable diameters are fabricated on silver substrates, resulting in humidity-responsive surface plasmon polaritons (SPPs) at the nanostructure-metal interfaces. The peaks of the SPPs are controlled reversibly by absorbing or releasing water within the hydrogel matrix, the matrix-generated plasmonic color rendering in the visible spectrum. This work demonstrates that metasurfaces designed with these spatially patterned nanodots of varying sizes benefit applications in anti-counterfeiting and generate multicolored displays with single-nanodot resolution. Furthermore, this work shows system versatility exhibited by broadband beam-steering on a phase modulator consisting of hydrogel supercell units in which the size variations of constituent hydrogel nanostructures engineer the wavefront of reflected light from the metasurface.
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Affiliation(s)
- Jian Zhang
- Information Research Center for EM Metamaterials and Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Qiang Li
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Chenjie Dai
- Electronic Information School, Wuhan University, Wuhan, 430072, China
| | - Mingliang Cheng
- Information Research Center for EM Metamaterials and Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Xin Hu
- Information Research Center for EM Metamaterials and Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Hyun-Sik Kim
- Department of Materials Science and Engineering, University of Seoul, Seoul, 02504, Korea
| | - Heesun Yang
- Department of Materials Science and Engineering, Hongik University, Seoul, 04066, Korea
| | - Daniel J Preston
- Department of Mechanical Engineering, Rice University, Houston, TX, 77006, USA
| | - Zhongyang Li
- Electronic Information School, Wuhan University, Wuhan, 430072, China
| | - Xuefeng Zhang
- Information Research Center for EM Metamaterials and Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Won-Kyu Lee
- Department of Materials Science and Engineering, Hongik University, Seoul, 04066, Korea
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Cui L, Yao Y, Yim EKF. The effects of surface topography modification on hydrogel properties. APL Bioeng 2021; 5:031509. [PMID: 34368603 PMCID: PMC8318605 DOI: 10.1063/5.0046076] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 06/21/2021] [Indexed: 12/23/2022] Open
Abstract
Hydrogel has been an attractive biomaterial for tissue engineering, drug delivery, wound healing, and contact lens materials, due to its outstanding properties, including high water content, transparency, biocompatibility, tissue mechanical matching, and low toxicity. As hydrogel commonly possesses high surface hydrophilicity, chemical modifications have been applied to achieve the optimal surface properties to improve the performance of hydrogels for specific applications. Ideally, the effects of surface modifications would be stable, and the modification would not affect the inherent hydrogel properties. In recent years, a new type of surface modification has been discovered to be able to alter hydrogel properties by physically patterning the hydrogel surfaces with topographies. Such physical patterning methods can also affect hydrogel surface chemical properties, such as protein adsorption, microbial adhesion, and cell response. This review will first summarize the works on developing hydrogel surface patterning methods. The influence of surface topography on interfacial energy and the subsequent effects on protein adsorption, microbial, and cell interactions with patterned hydrogel, with specific examples in biomedical applications, will be discussed. Finally, current problems and future challenges on topographical modification of hydrogels will also be discussed.
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Affiliation(s)
- Linan Cui
- Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Yuan Yao
- Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
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Micro- to Nanoscale Bio-Hybrid Hydrogels Engineered by Ionizing Radiation. Biomolecules 2020; 11:biom11010047. [PMID: 33396401 PMCID: PMC7824687 DOI: 10.3390/biom11010047] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/26/2020] [Accepted: 12/28/2020] [Indexed: 02/06/2023] Open
Abstract
Bio-hybrid hydrogels consist of a water-swollen hydrophilic polymer network encapsulating or conjugating single biomolecules, or larger and more complex biological constructs like whole cells. By modulating at least one dimension of the hydrogel system at the micro- or nanoscale, the activity of the biological component can be extremely upgraded with clear advantages for the development of therapeutic or diagnostic micro- and nano-devices. Gamma or e-beam irradiation of polymers allow a good control of the chemistry at the micro-/nanoscale with minimal recourse to toxic reactants and solvents. Another potential advantage is to obtain simultaneous sterilization when the absorbed doses are within the sterilization dose range. This short review will highlight opportunities and challenges of the radiation technologies to produce bio-hybrid nanogels as delivery devices of therapeutic biomolecules to the target cells, tissues, and organs, and to create hydrogel patterns at the nano-length and micro-length scales on surfaces.
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6
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Physical methods for controlling bacterial colonization on polymer surfaces. Biotechnol Adv 2020; 43:107586. [DOI: 10.1016/j.biotechadv.2020.107586] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 06/05/2020] [Accepted: 07/06/2020] [Indexed: 02/06/2023]
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7
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Mihalko WM, Haider H, Kurtz S, Marcolongo M, Urish K. New materials for hip and knee joint replacement: What's hip and what's in kneed? J Orthop Res 2020; 38:1436-1444. [PMID: 32437026 DOI: 10.1002/jor.24750] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 04/24/2020] [Accepted: 05/01/2020] [Indexed: 02/04/2023]
Abstract
Over the last three decades there have been significant advancements in the knee and hip replacement technology that has been driven by an issue in the past concerning adverse local tissue reactions, aseptic and septic loosening. The implants and the materials we utilize have improved over the last two decades and in knee and hip replacement there has been a decrease in the failures attributed to wear and osteolysis. Despite these advancements there are still issues with patient satisfaction and early revisions due to septic and aseptic loosening in knee replacement patients. This article reviews the state of current implant material technology in hip and knee replacement surgery, discusses some of the unmet needs we have in biomaterials, and reviews some of the current biomaterials and technology that may be able to solve the most common issues in the knee and hip replacement surgery.
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Affiliation(s)
- William M Mihalko
- Department of Orthopaedic Surgery and Biomedical Engineering, Campbell Clinic Department of Orthopaedic Surgery and Biomedical Engineering, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Hani Haider
- Orthopaedic Biomechanics and Advanced Surgical Technologies Laboratory, Department of Orthopaedic Surgery and Rehabilitation, University of Nebraska Medical Center, Omaha, Nebraska
| | - Steven Kurtz
- Exponent Inc., Drexel University, Philadelphia, Pennsylvania
| | - Michele Marcolongo
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania
| | - Kenneth Urish
- Department of Orthopaedic Surgery, Clinical and Translational Science Institute, University of Pittsburgh, Pittsburgh, Pennsylvania.,Department of Bioengineering, Clinical and Translational Science Institute, University of Pittsburgh, Pittsburgh, Pennsylvania.,Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania
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8
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Du C, Wang C, Zhang T, Yi X, Liang J, Wang H. Reduced bacterial adhesion on zirconium-based bulk metallic glasses by femtosecond laser nanostructuring. Proc Inst Mech Eng H 2020; 234:387-397. [PMID: 31884888 DOI: 10.1177/0954411919898011] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
As high-performing materials, bulk metallic glasses have attracted widespread attention for biomedical applications. Herein, the bacterial adhesion properties of femtosecond laser-nanostructured surfaces of four types of zirconium-based bulk metallic glasses are assessed. Laser-induced periodical surface structures and nanoparticle structures were fabricated by femtosecond laser irradiation under different energy intensities (0.23 and 2.3 J/mm2). Surface topography, roughness, wettability, and surface energy were investigated after femtosecond laser irradiation and the surface bacterial adhesion properties were explored using Escherichia coli and Staphylococcus aureus as respective representatives of Gram-negative and Gram-positive bacteria. 4',6-Diamidino-2-phenylindole fluorescence staining was used to characterize and assess the bacterial surface coverage rate. The in vitro cytotoxicity of polished and laser-nanostructured surfaces was investigated using MC3T3-E cells. The obtained results demonstrate that femtosecond laser surface nanostructuring retained the amorphous structure of zirconium-based bulk metallic glasses and led to an obvious decrease in bacterial adhesion compared with polished surfaces. The inhibition of bacterial adhesion on laser-induced periodical surface structures was greater than on nanostructured surfaces after 24 h of bacterial incubation. In addition, femtosecond laser nanostructuring did not have an apparent effect on the cytotoxicity of zirconium-based bulk metallic glasses.
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Affiliation(s)
- Cezhi Du
- School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, China
| | - Chengyong Wang
- School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, China
| | - Tao Zhang
- School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, China
| | - Xin Yi
- School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, China
| | - Jianyi Liang
- School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, China
| | - Hongjian Wang
- School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, China
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9
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De France KJ, Babi M, Vapaavuori J, Hoare T, Moran-Mirabal J, Cranston ED. 2.5D Hierarchical Structuring of Nanocomposite Hydrogel Films Containing Cellulose Nanocrystals. ACS APPLIED MATERIALS & INTERFACES 2019; 11:6325-6335. [PMID: 30668100 DOI: 10.1021/acsami.8b16232] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Although two-dimensional hydrogel thin films have been applied across many biomedical applications, creating higher dimensionality structured hydrogel interfaces would enable potentially improved and more biomimetic hydrogel performance in biosensing, bioseparations, tissue engineering, drug delivery, and wound healing applications. Herein, we present a new and simple approach to control the structure of hydrogel thin films in 2.5D. Hybrid suspensions containing cellulose nanocrystals (CNCs) and aldehyde- or hydrazide-functionalized poly(oligoethylene glycol methacrylate) (POEGMA) were spin-coated onto prestressed polystyrene substrates to form cross-linked hydrogel thin films. The films were then structured via thermal shrinking, with control over the direction of shrinking leading to the formation of biaxial, uniaxial, or hierarchical wrinkles. Notably, POEGMA-only hydrogel thin films (without CNCs) did not form uniform wrinkles due to partial dewetting from the substrate during shrinking. Topographical feature sizes of CNC-POEGMA films could be tuned across 2 orders of magnitude (from ∼300 nm to 20 μm) by varying the POEGMA concentration, the length of poly(ethylene glycol) side chains in the polymer, and/or the overall film thickness. Furthermore, by employing adhesive masks during the spin-coating process, structured films with gradient wrinkle sizes can be fabricated. This precise control over both wrinkle size and wrinkle topography adds a level of functionality that to date has been lacking in conventional hydrogel networks.
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Affiliation(s)
- Kevin J De France
- Department of Chemical Engineering , McMaster University , 1280 Main Street West , Hamilton , ON L8S 4L8 , Canada
| | - Mouhanad Babi
- Department of Chemistry and Chemical Biology , McMaster University , 1280 Main Street West , Hamilton , ON L8S 4M1 , Canada
| | - Jaana Vapaavuori
- Department of Chemistry , University of Montreal , C.P. 6128 Succursale Centre-ville , Montreal , QC H3C 3J7 , Canada
| | - Todd Hoare
- Department of Chemical Engineering , McMaster University , 1280 Main Street West , Hamilton , ON L8S 4L8 , Canada
| | - Jose Moran-Mirabal
- Department of Chemistry and Chemical Biology , McMaster University , 1280 Main Street West , Hamilton , ON L8S 4M1 , Canada
| | - Emily D Cranston
- Department of Chemical Engineering , McMaster University , 1280 Main Street West , Hamilton , ON L8S 4L8 , Canada
- Department of Wood Science , University of British Columbia , 2424 Main Mall , Vancouver , BC V6T 1Z4 , Canada
- Department of Chemical and Biological Engineering , University of British Columbia , 2360 East Mall , Vancouver , BC V6T 1Z3 , Canada
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10
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Kaplan JB, Mlynek KD, Hettiarachchi H, Alamneh YA, Biggemann L, Zurawski DV, Black CC, Bane CE, Kim RK, Granick MS. Extracellular polymeric substance (EPS)-degrading enzymes reduce staphylococcal surface attachment and biocide resistance on pig skin in vivo. PLoS One 2018; 13:e0205526. [PMID: 30304066 PMCID: PMC6179274 DOI: 10.1371/journal.pone.0205526] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 09/26/2018] [Indexed: 02/04/2023] Open
Abstract
Staphylococcal extracellular polymeric substances (EPS) such as extracellular DNA (eDNA) and poly-N-acetylglucosamine surface polysaccharide (PNAG) mediate numerous virulence traits including host colonization and antimicrobial resistance. Previous studies showed that EPS-degrading enzymes increase staphylococcal biocide susceptibility in vitro and in vivo, and decrease virulence in animal models. In the present study we tested the effect of EPS-degrading enzymes on staphylococcal skin colonization and povidone iodine susceptibility using a novel in vivo pig model that enabled us to colonize and treat 96 isolated areas of skin on a single animal in vivo. To quantitate skin colonization, punch biopsies of colonized areas were homogenized, diluted, and plated on agar for colony forming unit enumeration. Skin was colonized with either Staphylococcus epidermidis or Staphylococcus aureus. Two EPS-degrading enzymes, DNase I and the PNAG-degrading enzyme dispersin B, were employed. Enzymes were tested for their ability to inhibit skin colonization and detach preattached bacteria. The effect of enzymes on the susceptibility of preattached S. aureus to killing by povidone iodine was also measured. We found that dispersin B significantly inhibited skin colonization by S. epidermidis and detached preattached S. epidermidis cells from skin. A cocktail of dispersin B and DNase I detached preattached S. aureus cells from skin and increased their susceptibility to killing by povidone iodine. These findings suggest that staphylococcal EPS components such as eDNA and PNAG contribute to skin colonization and biocide resistance in vivo. EPS-degrading enzymes may be a useful adjunct to conventional skin antisepsis procedures in order to further reduce skin bioburden.
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Affiliation(s)
- Jeffrey B. Kaplan
- Department of Biology, American University, Washington, District of Columbia, United States of America
- * E-mail:
| | - Kevin D. Mlynek
- Department of Biology, American University, Washington, District of Columbia, United States of America
| | - Hashani Hettiarachchi
- Department of Biology, American University, Washington, District of Columbia, United States of America
| | - Yonas A. Alamneh
- Wound Infections Department, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
| | - Lionel Biggemann
- Wound Infections Department, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
| | - Daniel V. Zurawski
- Wound Infections Department, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
| | - Chad C. Black
- Wound Infections Department, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
| | - Charles E. Bane
- Wound Infections Department, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
| | - Robert K. Kim
- Wound Infections Department, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
| | - Mark S. Granick
- Department of Surgery, Rutgers New Jersey Medical School, Newark, New Jersey, United States of America
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11
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Hydrogels for Atopic Dermatitis and Wound Management: A Superior Drug Delivery Vehicle. Pharmaceutics 2018; 10:pharmaceutics10020071. [PMID: 29899219 PMCID: PMC6027388 DOI: 10.3390/pharmaceutics10020071] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 06/06/2018] [Accepted: 06/13/2018] [Indexed: 02/08/2023] Open
Abstract
Wound management, in addition to presenting a significant burden to patients and their families, also contributes significantly to a country’s healthcare costs. Treatment strategies are numerous, but in most cases not ideal. Hydrogels, three-dimensional polymeric materials that can withstand a great degree of swelling without losing structural integrity, are drawing great attention for their use as topical wound management solutions in the form of films and as vehicles for drug delivery, due to their unique properties of high water content, biocompatibility, and flexibility. Hydrogels, both naturally and synthetically derived, can be tuned to respond to specific stimuli such as pH, temperature and light and they are ideally suited as drug delivery vehicles. Here we provide a brief overview of the history and characteristics of hydrogels, assess their uses in wound management and drug delivery, and compare them with other types of common drug delivery vehicle.
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12
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Archaeal tetraether lipid coatings-A strategy for the development of membrane analog spacer systems for the site-specific functionalization of medical surfaces. Biointerphases 2018; 13:011004. [PMID: 29382205 DOI: 10.1116/1.5008816] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The primary goal of our investigation was the development of a versatile immobilization matrix based on archaeal tetraether lipids that meets the most important prerequisites to render an implant surface bioactive by binding specific functional groups or functional polymers with the necessary flexibility and an optimal spatial arrangement to be bioavailable. From this point of view, it appears obvious that numerous efforts made recently to avoid initial bacterial adhesion on catheter surfaces as an important prerequisite of material associated infection episodes have shown only a limited efficiency since the bioactive entities could not be presented in an optimal conformation and a stable density. A significant improvement of this situation can be achieved by highly specific biomimetic modifications of the catheter surfaces. The term "biomimetic" originates from the fact that specific archaeal tetraether lipids were introduced to form a membrane analog monomolecular spacer system, which (1) can be immobilized on nearly all solid surfaces and (2) chemically modified to present a tailor-made functionality in contact with aqueous media either to avoid or inhibit surface fouling or to equip any implant surface with the necessary chemical functionality to enable cell adhesion and tissue integration. Ultrathin films based on tetraether lipids isolated from archaea Thermoplasma acidophilum were used as a special biomimetic immobilization matrix on the surface of commercial medical silicon elastomers. A complete performance control of the membrane analog coatings was realized in addition to biofunctionality tests, including the proof of cytotoxicity and hemocompatibility according to DIN EN ISO 10993. In order to make sure that the developed immobilization matrix including the grafted functional groups are biocompatible under in vivo-conditions, specific animal tests were carried out to examine the in vivo-performance. It can be concluded that the tetraether lipid based coating systems on silicone have shown no signs of cytotoxicity and a good hemocompatibility. Moreover, no mutagenic effects, no irritation effects, and no sensitization effects could be demonstrated. After an implantation period of 28 days, no irregularities were found.
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Lockhart JN, Hmelo AB, Harth E. Electron beam lithography of poly(glycidol) nanogels for immobilization of a three-enzyme cascade. Polym Chem 2018. [DOI: 10.1039/c7py01904a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanogels devices with spatial confinement of multiple enzymes resulted in retention of bioactivity after 30 days with a 5 fold higher chromogenic output compared to free enzyme cascade devices.
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Affiliation(s)
- Jacob N. Lockhart
- Department of Chemistry
- Vanderbilt Institute of Nanoscale Science and Engineering
- Vanderbilt University
- 7665 Stevenson Center
- Nashville
| | - Anthony B. Hmelo
- Department of Chemistry
- Vanderbilt Institute of Nanoscale Science and Engineering
- Vanderbilt University
- 7665 Stevenson Center
- Nashville
| | - Eva Harth
- Department of Chemistry
- Center of Excellence in Polymer Research
- 406 STL Building
- University of Houston
- Houston
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14
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Zhang D, Fu Y, Huang L, Zhang Y, Ren B, Zhong M, Yang J, Zheng J. Integration of antifouling and antibacterial properties in salt-responsive hydrogels with surface regeneration capacity. J Mater Chem B 2018; 6:950-960. [DOI: 10.1039/c7tb03018e] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A new design for a new multifunctional hydrogel that integrates antimicrobial, antifouling, and surface regeneration properties for antimicrobial applications.
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Affiliation(s)
- Dong Zhang
- College of Materials Science & Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Yanhong Fu
- College of Materials Science & Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Lei Huang
- College of Materials Science & Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Yanxian Zhang
- Department of Chemical and Biomolecular Engineering
- The University of Akron
- Akron
- USA
| | - Baiping Ren
- Department of Chemical and Biomolecular Engineering
- The University of Akron
- Akron
- USA
| | - Mingqiang Zhong
- College of Materials Science & Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Jintao Yang
- College of Materials Science & Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Jie Zheng
- Department of Chemical and Biomolecular Engineering
- The University of Akron
- Akron
- USA
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15
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Zhang X, Brodus D, Hollimon V, Hu H. A brief review of recent developments in the designs that prevent bio-fouling on silicon and silicon-based materials. Chem Cent J 2017; 11:18. [PMID: 28261323 PMCID: PMC5318316 DOI: 10.1186/s13065-017-0246-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Accepted: 02/14/2017] [Indexed: 12/26/2022] Open
Abstract
Silicon and silicon-based materials are essential to our daily life. They are widely used in healthcare and manufacturing. However, silicon and silicon-based materials are susceptible to bio-fouling, which is of great concern in numerous applications. To date, interdisciplinary research in surface science, polymer science, biology, and engineering has led to the implementation of antifouling strategies for silicon-based materials. However, a review to discuss those antifouling strategies for silicon-based materials is lacking. In this article, we summarized two major approaches involving the functionalization of silicon and silicon-based materials with molecules exhibiting antifouling properties, and the fabrication of silicon-based materials with nano- or micro-structures. Both approaches lead to a significant reduction in bio-fouling. We critically reviewed the designs that prevent fouling due to proteins, bacteria, and marine organisms on silicon and silicon-based materials. Graphical abstractStrategies used in the designs that prevent bio-fouling on silicon and silicon-based materials.
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Affiliation(s)
- Xiaoning Zhang
- Department of Mathematics, Sciences and Technology, Paine College, 1235 Fifteenth Street, Augusta, GA 30901 USA
| | - DaShan Brodus
- Department of Mathematics, Sciences and Technology, Paine College, 1235 Fifteenth Street, Augusta, GA 30901 USA
| | - Valerie Hollimon
- Department of Mathematics, Sciences and Technology, Paine College, 1235 Fifteenth Street, Augusta, GA 30901 USA
| | - Hongmei Hu
- Key Laboratory of Mariculture and Enhancement of Zhejiang Province, Marine Fishery Institute of Zhejiang Province, Zhoushan, 316021 China
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16
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Sardella E, Palumbo F, Camporeale G, Favia P. Non-Equilibrium Plasma Processing for the Preparation of Antibacterial Surfaces. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E515. [PMID: 28773637 PMCID: PMC5456949 DOI: 10.3390/ma9070515] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 06/12/2016] [Accepted: 06/20/2016] [Indexed: 12/19/2022]
Abstract
Non-equilibrium plasmas offer several strategies for developing antibacterial surfaces that are able to repel and/or to kill bacteria. Due to the variety of devices, implants, and materials in general, as well as of bacteria and applications, plasma assisted antibacterial strategies need to be tailored to each specific surface. Nano-composite coatings containing inorganic (metals and metal oxides) or organic (drugs and biomolecules) compounds can be deposited in one step, and used as drug delivery systems. On the other hand, functional coatings can be plasma-deposited and used to bind antibacterial molecules, for synthesizing surfaces with long lasting antibacterial activity. In addition, non-fouling coatings can be produced to inhibit the adhesion of bacteria and reduce the formation of biofilm. This paper reviews plasma-based strategies aimed to reduce bacterial attachment and proliferation on biomedical materials and devices, but also onto materials used in other fields. Most of the activities described have been developed in the lab of the authors.
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Affiliation(s)
- Eloisa Sardella
- Istituto di Nanotecnologia, Consiglio Nazionale delle Ricerche, Via Orabona 4, 70126 Bari, Italy.
| | - Fabio Palumbo
- Istituto di Nanotecnologia, Consiglio Nazionale delle Ricerche, Via Orabona 4, 70126 Bari, Italy.
| | - Giuseppe Camporeale
- Dipartimento di Chimica Università degli Studi di Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy.
| | - Pietro Favia
- Istituto di Nanotecnologia, Consiglio Nazionale delle Ricerche, Via Orabona 4, 70126 Bari, Italy.
- Dipartimento di Chimica Università degli Studi di Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy.
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17
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Mancini RJ, Paluck SJ, Bat E, Maynard HD. Encapsulated Hydrogels by E-beam Lithography and Their Use in Enzyme Cascade Reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4043-51. [PMID: 27078573 PMCID: PMC4852853 DOI: 10.1021/acs.langmuir.6b00560] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Electron beam (e-beam) lithography was employed to prepare one protein immobilized hydrogel encapsulated inside another by first fabricating protein-reactive hydrogels of orthogonal reactivity and subsequently conjugating the biomolecules. Exposure of thin films of eight arm star poly(ethylene glycol) (PEG) functionalized with biotin (Biotin-PEG), alkyne (Alkyne-PEG) or aminooxy (AO-PEG) end-groups to e-beam radiation resulted in cross-linked hydrogels with the respective functionality. It was determined via confocal microscopy that a nominal size exclusion effect exists for streptavidin immobilized on Biotin-PEG hydrogels of feature sizes ranging from 5 to 40 μm. AO-PEG was subsequently patterned as an encapsulated core inside a contiguous outer shell of Biotin-PEG. Similarly, Alkyne-PEG was patterned as a core inside an AO-PEG shell. The hydrogel reactive end-groups were conjugated to dyes or proteins of complementary reactivity, and the three-dimensional (3-D) spatial orientation was determined for both configurations using confocal microscopy. The enzyme glucose oxidase (GOX) was immobilized in the core of the encapsulated Alkyne-PEG core/ AO-PEG shell architecture, and horseradish peroxidase (HRP) was conjugated to the shell periphery. Bioactivity for the HRP-GOX enzyme pair was observed in this encapsulated configuration by demonstrating that the enzyme pair was capable of enzyme cascade reactions.
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18
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Böhmler J, Haidara H, Ponche A, Ploux L. Impact of Chemical Heterogeneities of Surfaces on Colonization by Bacteria. ACS Biomater Sci Eng 2015; 1:693-704. [DOI: 10.1021/acsbiomaterials.5b00151] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Judith Böhmler
- Institut
de Science des Matériaux
de Mulhouse, CNRS-UMR7361, University of Strasbourg/University of Haute-Alsace, UMR7361, Mulhouse, France
| | - Hamidou Haidara
- Institut
de Science des Matériaux
de Mulhouse, CNRS-UMR7361, University of Strasbourg/University of Haute-Alsace, UMR7361, Mulhouse, France
| | - Arnaud Ponche
- Institut
de Science des Matériaux
de Mulhouse, CNRS-UMR7361, University of Strasbourg/University of Haute-Alsace, UMR7361, Mulhouse, France
| | - Lydie Ploux
- Institut
de Science des Matériaux
de Mulhouse, CNRS-UMR7361, University of Strasbourg/University of Haute-Alsace, UMR7361, Mulhouse, France
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19
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Gumuscu B, Bomer JG, van den Berg A, Eijkel JCT. Large scale patterning of hydrogel microarrays using capillary pinning. LAB ON A CHIP 2015; 15:664-7. [PMID: 25512130 DOI: 10.1039/c4lc01350f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Capillary barriers provide a simple and elegant means for autonomous fluid-flow control in microfluidic systems. In this work, we report on the fabrication of periodic hydrogel microarrays in closed microfluidic systems using non-fluorescent capillary barriers. This design strategy enables the fabrication of picoliter-volume patterns of photopolymerized and thermo-gelling hydrogels without any defects and distortions.
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Affiliation(s)
- Burcu Gumuscu
- BIOS Lab-on-a-Chip Group, MESA+ Institute for Nanotechnology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands.
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20
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Palacios-Cuesta M, Cortajarena AL, García O, Rodríguez-Hernández J. Patterning of individual Staphylococcus aureus bacteria onto photogenerated polymeric surface structures. Polym Chem 2015. [DOI: 10.1039/c4py01629g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This manuscript describes the fabrication of bacterial surface arrays by using photolithographic techniques having in addition some particularly interesting features.
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Affiliation(s)
- Marta Palacios-Cuesta
- Department of Chemistry and Properties of Polymers
- Instituto de Ciencia y Tecnología de Polímeros
- (ICTP-CSIC)
- 28006-Madrid
- Spain
| | - Aitziber L. Cortajarena
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia) & CNB-CSIC-IMDEA Nanociencia Associated Unit “Unidad de Nanobiotecnología”
- 28049 Madrid
- Spain
| | - Olga García
- Department of Chemistry and Properties of Polymers
- Instituto de Ciencia y Tecnología de Polímeros
- (ICTP-CSIC)
- 28006-Madrid
- Spain
| | - Juan Rodríguez-Hernández
- Department of Chemistry and Properties of Polymers
- Instituto de Ciencia y Tecnología de Polímeros
- (ICTP-CSIC)
- 28006-Madrid
- Spain
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21
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Vyner MC, Li A, Amsden BG. The effect of poly(trimethylene carbonate) molecular weight on macrophage behavior and enzyme adsorption and conformation. Biomaterials 2014; 35:9041-8. [DOI: 10.1016/j.biomaterials.2014.07.023] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Accepted: 07/18/2014] [Indexed: 10/24/2022]
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22
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Rochford ETJ, Subbiahdoss G, Moriarty TF, Poulsson AHC, van der Mei HC, Busscher HJ, Richards RG. Anin vitroinvestigation of bacteria-osteoblast competition on oxygen plasma-modified PEEK. J Biomed Mater Res A 2014; 102:4427-34. [DOI: 10.1002/jbm.a.35130] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 02/05/2014] [Accepted: 02/11/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Edward T. J. Rochford
- AO Research Institute Davos, 7270 Davos; Switzerland
- Institute of Biological, Environmental and Rural sciences, Aberystwyth University; Wales, United Kingdom
| | - Guruprakash Subbiahdoss
- Department of BioMedical Engineering; University of Groningen and University Medical Center Groningen; Groningen The Netherlands
| | | | | | - Henny C. van der Mei
- Department of BioMedical Engineering; University of Groningen and University Medical Center Groningen; Groningen The Netherlands
| | - Henk J. Busscher
- Department of BioMedical Engineering; University of Groningen and University Medical Center Groningen; Groningen The Netherlands
| | - R. Geoff Richards
- AO Research Institute Davos, 7270 Davos; Switzerland
- Institute of Biological, Environmental and Rural sciences, Aberystwyth University; Wales, United Kingdom
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23
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Desrousseaux C, Sautou V, Descamps S, Traoré O. Modification of the surfaces of medical devices to prevent microbial adhesion and biofilm formation. J Hosp Infect 2013; 85:87-93. [PMID: 24007718 DOI: 10.1016/j.jhin.2013.06.015] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Accepted: 06/27/2013] [Indexed: 02/08/2023]
Abstract
BACKGROUND The development of devices with surfaces that have an effect against microbial adhesion or viability is a promising approach to the prevention of device-related infections. AIM To review the strategies used to design devices with surfaces able to limit microbial adhesion and/or growth. METHODS A PubMed search of the published literature. FINDINGS One strategy is to design medical devices with a biocidal agent. Biocides can be incorporated into the materials or coated or covalently bonded, resulting either in release of the biocide or in contact killing without release of the biocide. The use of biocides in medical devices is debated because of the risk of bacterial resistance and potential toxicity. Another strategy is to modify the chemical or physical surface properties of the materials to prevent microbial adhesion, a complex phenomenon that also depends directly on microbial biological structure and the environment. Anti-adhesive chemical surface modifications mostly target the hydrophobicity features of the materials. Topographical modifications are focused on roughness and nanostructures, whose size and spatial organization are controlled. The most effective physical parameters to reduce bacterial adhesion remain to be determined and could depend on shape and other bacterial characteristics. CONCLUSIONS A prevention strategy based on reducing microbial attachment rather than on releasing a biocide is promising. Evidence of the clinical efficacy of these surface-modified devices is lacking. Additional studies are needed to determine which physical features have the greatest potential for reducing adhesion and to assess the usefulness of antimicrobial coatings other than antibiotics.
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Affiliation(s)
- C Desrousseaux
- Clermont Université, Université d'Auvergne, C-BIOSENSS, Clermont-Ferrand, France; LMGE «Laboratoire Micro-organismes: Génome et Environnement», Clermont Université, Université Blaise Pascal et Université d'Auvergne, Clermont-Ferrand, France
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24
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Wang Y, Firlar E, Dai X, Libera M. Poly(ethylene glycol) as a biointeractive electron-beam resist. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/polb.23367] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yi Wang
- Department of Chemical Engineering and Materials Science; Stevens Institute of Technology; Hoboken; New Jersey
| | - Emre Firlar
- Department of Chemical Engineering and Materials Science; Stevens Institute of Technology; Hoboken; New Jersey
| | - Xiaoguang Dai
- Department of Chemical Engineering and Materials Science; Stevens Institute of Technology; Hoboken; New Jersey
| | - Matthew Libera
- Department of Chemical Engineering and Materials Science; Stevens Institute of Technology; Hoboken; New Jersey
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25
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Wang Q, Uzunoglu E, Wu Y, Libera M. Self-assembled poly(ethylene glycol)-co-acrylic acid microgels to inhibit bacterial colonization of synthetic surfaces. ACS APPLIED MATERIALS & INTERFACES 2012; 4:2498-506. [PMID: 22519439 DOI: 10.1021/am300197m] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We explored the use of self-assembled microgels to inhibit the bacterial colonization of synthetic surfaces both by modulating surface cell adhesiveness at length scales comparable to bacterial dimensions (∼1 μm) and by locally storing/releasing an antimicrobial. Poly(ethylene glycol) [PEG] and poly(ethylene glycol)-co-acrylic acid [PEG-AA] microgels were synthesized by suspension photopolymerization. Consistent with macroscopic gels, a pH dependence of both zeta potential and hydrodynamic diameter was observed in AA-containing microgels but not in pure PEG microgels. The microgels were electrostatically deposited onto poly(l-lysine) (PLL) primed silicon to form submonolayer surface coatings. The microgel surface density could be controlled via the deposition time and the microgel concentration in the parent suspension. In addition to their intrinsic antifouling properties, after deposition, the microgels could be loaded with a cationic antimicrobial peptide (L5) because of favorable electrostatic interactions. Loading was significantly higher in PEG-AA microgels than in pure PEG microgels. The modification of PLL-primed Si by unloaded PEG-AA microgels reduced the short-term (6 h) S. epidermidis surface colonization by a factor of 2, and the degree of inhibition increased when the average spacing between microgels was reduced. Postdeposition L5 peptide loading into microgels further reduced bacterial colonization to the extent that, after 10 h of S. epidermidis culture in tryptic soy broth, the colonization of L5-loaded PEG-AA microgel-modified Si was comparable to the very small level of colonization observed on macroscopic PEG gel controls. The fact that these microgels can be deposited by a nonline-of-sight self-assembly process and hinder bacterial colonization opens the possibility of modifying the surfaces of topographically complex biomedical devices and reduces the rate of biomaterial-associated infection.
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Affiliation(s)
- Qichen Wang
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA
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26
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Wong I, Ding X, Wu C, Ho CM. Accurate and Effective Live Bacteria Microarray Patterning on Thick Polycationic Polymer Layer Co-Patterned with HMDS. RSC Adv 2012; 2:7673-7676. [PMID: 23418622 DOI: 10.1039/c2ra20938a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new bacteria microarray patterning technique is developed by patterning thick polycationic polymers on glass surface, which generates high-coverage and high-precision E. coli cell patterns. Cell immobilization efficiency is greatly improved, compared to conventional monolayer surface patterning approach. Cell viability tests show very low cytotoxicity of polyethyleneimine (PEI). This advancement should further accelerate biomedical and bacteriological researches in the micro scale.
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Affiliation(s)
- Ieong Wong
- Department of Mechanical and Aerospace Engineering, School of Engineering and Applied Science, University of California, Los Angeles, 420 Westwood Plaza, Los Angeles, CA 90095-1597, USA. Fax:+1 (310) 206 2302; Tel: +1 (310) 825 9993
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27
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Lawrence NJ, Wells-Kingsbury JM, Ihrig MM, Fangman TE, Namavar F, Cheung CL. Controlling E. coli adhesion on high-k dielectric bioceramics films using poly(amino acid) multilayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:4301-4308. [PMID: 22339263 DOI: 10.1021/la2033725] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The influence of high-k dielectric bioceramics with poly(amino acid) multilayer coatings on the adhesion behavior of Escherichia coli (E. coli) was studied by evaluating the density of bacteria coverage on the surfaces of these materials. A biofilm forming K-12 strain (PHL628), a wild-type strain (JM109), and an engineered strain (XL1-Blue) of E. coli were examined for their adherence to zirconium oxide (ZrO(2)) and tantalum oxide (Ta(2)O(5)) surfaces functionalized with single and multiple layers of poly(amino acid) polyelectrolytes made by the layer-by-layer (LBL) deposition. Two poly(amino acids), poly(l-arginine) (PARG) and poly(l-aspartic acid) (PASP), were chosen for the functionalization schemes. All three strains were found to grow and preferentially adhere to bare bioceramic film surfaces over bare glass slides. The bioceramic and glass surfaces functionalized with positively charged poly(amino acid) top layers were observed to enhance the adhesion of these bacteria by up to 4-fold in terms of bacteria surface coverage. Minimal bacteria coverage was detected on surfaces functionalized with negatively charged poly(amino acid) top layers. The effect of different poly(amino acid) coatings to promote or minimize bacterial adhesion was observed to be drastically enhanced with the bioceramic substrates than with glass. Such observed enhancements were postulated to be attributed to the formation of higher density of poly(amino acids) coatings enabled by the high dielectric strength (k) of these bioceramics. The multilayer poly(amino acid) functionalization scheme was successfully applied to utilize this finding for micropatterning E. coli on bioceramic thin films.
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Affiliation(s)
- Neil J Lawrence
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
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28
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Wang Y, Subbiahdoss G, de Vries J, Libera M, van der Mei HC, Busscher HJ. Effect of adsorbed fibronectin on the differential adhesion of osteoblast-like cells and Staphylococcus aureus with and without fibronectin-binding proteins. BIOFOULING 2012; 28:1011-1021. [PMID: 23004018 DOI: 10.1080/08927014.2012.725471] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The influence of fibronectin (Fn) coated surfaces patterned with poly(ethylene glycol) microgels having inter-gel spacings between 0.5 and 3.0 μm on the adhesion of Staphylococcus aureus strains with and without Fn-binding proteins and cellular adhesion/spreading was investigated. Quantitative force measurements between a S. aureus cell and a patterned surface showed that the adhesion force between the bacterium and the patterned surface increased substantially after Fn adsorption, regardless of the strain used, but decreased with decreasing inter-gel spacing. In flow-chamber experiments, the Fn-binding strain adhered at a higher rate after Fn adsorption than the strain lacking Fn-binding proteins. In both cases, the adhesion rates decreased with decreasing inter-gel spacing. Osteoblast-like cells could bind to patterned surfaces despite the microgels, and adsorbed Fn substantially amplified this effect. Even under highly non-adhesive conditions associated with closely spaced microgels, adsorbed Fn preserves a window of inter-gel spacing around 1 μm where the adhesion of staphylococcal cells is hindered while cells can still adhere and spread.
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Affiliation(s)
- Y Wang
- Department of Biomedical Engineering, W.J. Kolff Institute, University Medical Center and University of Groningen, The Netherlands
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29
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Fang B, Gon S, Park M, Kumar KN, Rotello VM, Nusslein K, Santore MM. Bacterial adhesion on hybrid cationic nanoparticle–polymer brush surfaces: Ionic strength tunes capture from monovalent to multivalent binding. Colloids Surf B Biointerfaces 2011; 87:109-15. [DOI: 10.1016/j.colsurfb.2011.05.010] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 04/04/2011] [Accepted: 05/03/2011] [Indexed: 01/04/2023]
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30
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Pedron S, Peinado C, Catalina F, Bosch P, Anseth KS, Abrusci C. Combinatorial approach for fabrication of coatings to control bacterial adhesion. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2011; 23:1613-28. [PMID: 21888758 DOI: 10.1163/092050611x589329] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Due to the high importance of bacterial infections in medical devices there is an increasing interest in the design of anti-fouling coatings. The application of substrates with controlled chemical gradients to prevent microbial adhesion is presented. We describe here the co-polymerization of poly(ethylene glycol) dimethacrylate with a hyperbranched multimethacrylate (H30MA) using a chemical gradient generator; and the resulting films were characterized with respect to their ability to serve as coating for biomedical devices. The photo-polymerized materials present special surface properties due to the hyperbranched structure of H30MA and phase separation at specific concentrations in the PEGDM matrix. This approach affords the investigation of cell response to a large range of different chemistries on a single sample. Two bacterial strains commonly associated with surgical site infections, Escherichia coli and Pseudomonas aeruginosa, have been cultured on these substrates to study their attachment behaviour. These gradient-coated samples demonstrate less bacterial adhesion at higher concentrations of H30MA, and the adhesion is substantially affected by the extent of surface phase segregation.
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Affiliation(s)
- S Pedron
- a Institute de Ciencia y Tecnología de Polímeros, CSIC , Juan de la Cierva 3 , 28006 , Madrid , Spain
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31
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Inhibition of bacterial adhesion on biocompatible zwitterionic SBA-15 mesoporous materials. Acta Biomater 2011; 7:2977-85. [PMID: 21392588 DOI: 10.1016/j.actbio.2011.03.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Revised: 02/10/2011] [Accepted: 03/03/2011] [Indexed: 11/24/2022]
Abstract
In this manuscript in vitro bacterial adhesion assays using Escherichia coli on different SBA-15 nanostructured ceramics have been performed. For this purpose pure silica, NH(2) or COOH monofunctionalized, and NH(2)/COOH bifunctionalized SBA-15 mesoporous materials have been used. Material characterization reveals that both NH(2)/COOH and NH(2) functionalized SBA-15 materials exhibit a zwitterionic character due to the presence of -NH(3)(+)/COO(-) or -NH(3)(+)/SiO(-) moieties, respectively. In vitro adhesion assays have been carried out at the pH at which the zwitterionic nature of both of these samples is preserved, i.e. pH 5.5. The results show that the presence of both positive and negative moieties with an overall neutral charge leads to reduced E. coli adhesiveness. In vitro tests with cultured human Saos-2 osteoblasts have been carried out to evaluate the biocompatibility of the different materials at the physiological pH of 7.4. The results demonstrate that all materials exhibit good biocompatibility, with Saos-2 osteoblasts adhering, proliferating and maintaining their morphological and functional characteristics. This novel family of zwitterionic mesoporous materials opens up promising expectations in diverse biomedical applications, such as preventing some side-effects associated with bone implant infections.
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32
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Flickinger ST, Copeland MF, Downes EM, Braasch AT, Tuson HH, Eun YJ, Weibel DB. Quorum sensing between Pseudomonas aeruginosa biofilms accelerates cell growth. J Am Chem Soc 2011; 133:5966-75. [PMID: 21434644 DOI: 10.1021/ja111131f] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This manuscript describes the fabrication of arrays of spatially confined chambers embossed in a layer of poly(ethylene glycol) diacrylate (PEGDA) and their application to studying quorum sensing between communities of Pseudomonas aeruginosa. We hypothesized that biofilms may produce stable chemical signaling gradients in close proximity to surfaces, which influence the growth and development of nearby microcolonies into biofilms. To test this hypothesis, we embossed a layer of PEGDA with 1.5-mm wide chambers in which P. aeruginosa biofilms grew, secreted homoserine lactones (HSLs, small molecule regulators of quorum sensing), and formed spatial and temporal gradients of these compounds. In static growth conditions (i.e., no flow), nascent biofilms secreted N-(3-oxododecanoyl) HSL that formed a gradient in the hydrogel and was detected by P. aeruginosa cells that were ≤8 mm away. Diffusing HSLs increased the growth rate of cells in communities that were <3 mm away from the biofilm, where the concentration of HSL was >1 μM, and had little effect on communities farther away. The HSL gradient had no observable influence on biofilm structure. Surprisingly, 0.1-10 μM of N-(3-oxododecanoyl) HSL had no effect on cell growth in liquid culture. The results suggest that the secretion of HSLs from a biofilm enhances the growth of neighboring cells in contact with surfaces into communities and may influence their composition, organization, and diversity.
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Affiliation(s)
- Shane T Flickinger
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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Contreras-García A, Bucio E, Brackman G, Coenye T, Concheiro A, Alvarez-Lorenzo C. Biofilm inhibition and drug-eluting properties of novel DMAEMA-modified polyethylene and silicone rubber surfaces. BIOFOULING 2011; 27:123-135. [PMID: 21213154 DOI: 10.1080/08927014.2010.548115] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Poly(2-(dimethylaminoethyl) methacrylate) (pDMAEMA) was grafted to low density polyethylene (LDPE) and silicone rubber (SR) in order to make them less susceptible to microbial biofilm formation. The direct grafting of DMAEMA using γ-rays was an efficient and fast procedure for obtaining modified materials, which could be quaternized in a second step using methyl iodide. Raman spectroscopy showed that the grafting occurred only at the surface of the LDPE, but both at the surface and in the bulk of the SR. Consequently, the grafted chains caused changes in the surface-related features of the LDPE (water contact angle and viscoelastic behavior in the dry state) and in the bulk-related properties of the SR (swelling and viscoelasticity in the swollen state). The microbiological assays revealed that the grafted DMAEMA reduced Candida albicans biofilm formation (almost no biofilm on SR), while the quaternized surfaces inhibited C. albicans and Staphylococcus aureus biofilm by more than 99% compared to pristine materials. Modified LDPE and SR were capable of holding considerable amounts of nalidixic acid, an anionic antimicrobial drug, and sustained the release for several hours. In addition, the grafted materials were cytocompatible (fibroblast cell survival > 70%). In conclusion, these materials have the ability to inhibit microbial biofilm formation and at the same time act as drug-eluting systems, and for that reason may hold great promise for anti-biofouling applications.
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Affiliation(s)
- Angel Contreras-García
- Departamento de Quimica de Radiaciones y Radioquimica, Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Circuito Exterior, Ciudad Universitaria, Mexico, Mexico
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Wu Y, Zitelli JP, TenHuisen KS, Yu X, Libera MR. Differential response of Staphylococci and osteoblasts to varying titanium surface roughness. Biomaterials 2011; 32:951-60. [DOI: 10.1016/j.biomaterials.2010.10.001] [Citation(s) in RCA: 169] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Accepted: 09/20/2010] [Indexed: 10/18/2022]
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Pavlukhina S, Lu Y, Patimetha A, Libera M, Sukhishvili S. Polymer Multilayers with pH-Triggered Release of Antibacterial Agents. Biomacromolecules 2010; 11:3448-56. [DOI: 10.1021/bm100975w] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Svetlana Pavlukhina
- Department of Chemistry, Chemical Biology and Biomedical Engineering and Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Yiming Lu
- Department of Chemistry, Chemical Biology and Biomedical Engineering and Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Altida Patimetha
- Department of Chemistry, Chemical Biology and Biomedical Engineering and Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Matthew Libera
- Department of Chemistry, Chemical Biology and Biomedical Engineering and Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Svetlana Sukhishvili
- Department of Chemistry, Chemical Biology and Biomedical Engineering and Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
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Krsko P, McCann TE, Thach TT, Laabs TL, Geller HM, Libera MR. Length-scale mediated adhesion and directed growth of neural cells by surface-patterned poly(ethylene glycol) hydrogels. Biomaterials 2009; 30:721-9. [PMID: 19026443 PMCID: PMC3282616 DOI: 10.1016/j.biomaterials.2008.10.011] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Accepted: 10/13/2008] [Indexed: 11/26/2022]
Abstract
We engineered surfaces that permit the adhesion and directed growth of neuronal cell processes but that prevent the adhesion of astrocytes. This effect was achieved based on the spatial distribution of sub-micron-sized cell-repulsive poly(ethylene glycol) [PEG] hydrogels patterned on an otherwise cell-adhesive substrate. Patterns were identified that promoted cellular responses ranging from complete non-attachment, selective attachment, and directed growth at both cellular and subcellular length scales. At the highest patterning density where the individual hydrogels almost overlapped, there was no cellular adhesion. As the spacing between individual hydrogels was increased, patterns were identified where neurites could grow on the adhesive surface between hydrogels while astrocytes were unable to adhere. Patterns such as lines or arrays were identified that could direct the growth of these subcellular neuronal processes. At higher hydrogel spacings, both neurons and astrocytes adhered and grew in a manner approaching that of unpatterned control surfaces. Patterned lines could once again direct growth at cellular length scales. Significantly, we have demonstrated that the patterning of sub-micron/nano scale cell-repulsive features at microscale lengths on an otherwise cell-adhesive surface can differently control the adhesion and growth of cells and cell processes based on the difference in their characteristic sizes. This concept could potentially be applied to an implantable nerve-guidance device that would selectively enable regrowing axons to bridge a spinal-cord injury without interference from the glial scar.
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Affiliation(s)
- Peter Krsko
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, 1 Castle Point Terrace, Hoboken, NJ 07030, USA
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