1
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Xu Z, Gamble A, Niu WA, Smith MN, Sloan Siegrist M, Tuominen M, Santore MM. Contact Area and Deformation of Escherichia coli Cells Adhered on a Cationic Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6387-6398. [PMID: 37053037 PMCID: PMC10685399 DOI: 10.1021/acs.langmuir.3c00089] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
When bacteria adhere to surfaces, the chemical and mechanical character of the cell-substrate interface guides cell function and the development of microcolonies and biofilms. Alternately on bactericidal surfaces, intimate contact is critical to biofilm prevention. The direct study of the buried cell-substrate interfaces at the heart of these behaviors is hindered by the small bacterial cell size and inaccessibility of the contact region. Here, we present a total internal reflectance fluorescence depletion approach to measure the size of the cell-substrate contact region and quantify the gap separation and curvature near the contact zone, providing an assessment of the shapes of the near-surface undersides of adhered bacterial cells. Resolution of the gap height is about 10%, down to a few nanometers at contact. Using 1 and 2 μm silica spheres as calibration standards we report that, for flagella-free Escherichia coli (E. coli) adhering on a cationic poly-l-lysine layer, the cell-surface contact and apparent cell deformation vary with adsorbed cell configuration. Most cells adhere by their ends, achieving small contact areas of 0.15 μm2, corresponding to about 1-2% of the cell's surface. The altered Gaussian curvatures of end-adhered cells suggest the flattening of the envelope within the small contact region. When cells adhere by their sides, the contact area is larger, in the range 0.3-1.1 μm2 and comprising up to ∼12% of the cell's total surface. A region of sharper curvature, greater than that of the cells' original spherocylindrical shape, borders the flat contact region in cases of side-on or end-on cell adhesion, suggesting envelope stress. From the measured curvatures, precise stress distributions over the cell surface could be calculated in future studies that incorporate knowledge of envelope moduli. Overall the small contact areas of end-adhered cells may be a limiting factor for antimicrobial surfaces that kill on contact rather than releasing bactericide.
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Affiliation(s)
- Zhou Xu
- Department of Physics, University of Massachusetts, Amherst, MA 01003 USA
| | - Alexander Gamble
- Department of Plant and Soil Science, University of Massachusetts, Amherst, MA 01003 USA
| | - Wuqi Amy Niu
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, MA 01003 USA
| | - Morgan N. Smith
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, MA 01003 USA
| | - M. Sloan Siegrist
- Department of Microbiology, University of Massachusetts Amherst, MA 01003 USA
- Molecular and Cellular Biology Graduate Program, University of Massachusetts, Amherst, MA 01003 USA
| | - Mark Tuominen
- Department of Physics, University of Massachusetts, Amherst, MA 01003 USA
| | - Maria M. Santore
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, MA 01003 USA
- Molecular and Cellular Biology Graduate Program, University of Massachusetts, Amherst, MA 01003 USA
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2
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Tsuchii T, Kaneko K, Morita K, Nishino T, Maruyama T. Rewritable Surface on a Plastic Substrate Using Fluorous Affinity. ACS APPLIED MATERIALS & INTERFACES 2022; 14:3255-3263. [PMID: 34923822 DOI: 10.1021/acsami.1c18633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Fluorous chemistry has unique features and high potential applicability, which are distinct from those of nonfluorinated organic compounds. However, there are limited reports detailing the applications of fluorous-fluorous interactions (fluorophilicity or fluorous affinity), likely because these interactions are not found in nature. In the present study, we describe the rewritable surface functionalization of a plastic substrate based on fluorous affinity. Plastic substrates were dip-coated with a series of methacrylate-based fluoropolymers to generate fluorous surfaces. Fluorous-tagged small molecules [perfluoroalkyl (Rf) amines] were immobilized on the fluorous surfaces via fluorous-fluorous interactions, thereby introducing reactive functional groups (amino moieties) on the surface. The amino groups displayed on the surface (accessible by a reactant) were successfully quantified using a reactive fluorophore, which enabled quantitative analysis of the Rf-amines immobilized on the fluorous surface that were available for the subsequent reaction. The effects of the molecular structures of the fluoropolymers and Rf-amines on the surface immobilization of Rf-amines were also investigated quantitatively. The surface coated with a fluoropolymer containing -C8F17 most effectively immobilized an Rf-amine comprising two -C6F13 chains. The adhered Rf-amines were easily removed by washing the surface with methanol, and then, they could successfully be re-immobilized on the surface. Finally, the presented approach enabled the rewritable micropatterning of an Rf-tagged biomolecule on a plastic surface through microcontact printing.
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Affiliation(s)
- Takane Tsuchii
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe 657-8501, Japan
| | - Kazuki Kaneko
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe 657-8501, Japan
| | - Kenta Morita
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe 657-8501, Japan
| | - Takashi Nishino
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe 657-8501, Japan
| | - Tatsuo Maruyama
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe 657-8501, Japan
- Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
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3
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Construction and Characterizations of Antibacterial Surfaces Based on Self-Assembled Monolayer of Antimicrobial Peptides (Pac-525) Derivatives on Gold. COATINGS 2021. [DOI: 10.3390/coatings11091014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background: Infection that is related to implanted biomaterials is a serious issue in the clinic. Antimicrobial peptides (AMPs) have been considered as an ideal alternative to traditional antibiotic drugs, for the treatment of infections, while some problems, such as aggregation and protein hydrolysis, are still the dominant concerns that compromise their antimicrobial efficiency in vivo. Methods: In this study, antimicrobial peptides underwent self-assembly on gold substrates, forming good antibacterial surfaces, with stable antibacterial behavior. The antimicrobial ability of AMPs grafted on the surfaces, with or without glycine spaces or a primer layer, was evaluated. Results: Specifically, three Pac-525 derivatives, namely, Ac-CGn-KWRRWVRWI-NH2 (n = 0, 2, or 6) were covalently grafted onto gold substrates via the self-assembling process for inhibiting the growth of Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). Furthermore, the alkanethiols HS(CH)10SH were firstly self-assembled into monolayers, as a primer layer (SAM-SH) for the secondary self-assembly of Pac-525 derivatives, to effectively enhance the bactericidal performance of the grafted AMPs. The -(CH)10-S-S-G6Pac derivative was highly effective against S. aureus and E. coli, and reduced the viable amount of E. coli and S. aureus to 0.4% and 33.2%, respectively, after 24 h of contact. In addition, the immobilized AMPs showed good biocompatibility, promoting bone marrow stem cell proliferation. Conclusion: the self-assembled monolayers of the Pac-525 derivatives have great potential as a novel therapeutic method for the treatment of implanted biomaterial infections.
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Kazemzadeh-Narbat M, Cheng H, Chabok R, Alvarez MM, de la Fuente-Nunez C, Phillips KS, Khademhosseini A. Strategies for antimicrobial peptide coatings on medical devices: a review and regulatory science perspective. Crit Rev Biotechnol 2020; 41:94-120. [PMID: 33070659 DOI: 10.1080/07388551.2020.1828810] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Indwelling and implanted medical devices are subject to contamination by microbial pathogens during surgery, insertion or injection, and ongoing use, often resulting in severe nosocomial infections. Antimicrobial peptides (AMPs) offer a promising alternative to conventional antibiotics to reduce the incidence of such infections, as they exhibit broad-spectrum antimicrobial activity against Gram-negative and Gram-positive bacteria, microbial biofilms, fungi, and viruses. In this review-perspective, we first provide an overview of the progress made in this field over the past decade with an emphasis on the local release of AMPs from implant surfaces and immobilization strategies for incorporating these agents into a wide range of medical device materials. We then provide a regulatory science perspective addressing the characterization and testing of AMP coatings based on the type of immobilization strategy used with a focus on the US market regulatory niche. Our goal is to help narrow the gulf between academic studies and preclinical testing, as well as to support a future literature base in order to develop the regulatory science of antimicrobial coatings.
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Affiliation(s)
- Mehdi Kazemzadeh-Narbat
- Office of Device Evaluation, Center for Devices and Radiological Health, US Food and Drug Administration, Silver Spring, MD, USA
| | - Hao Cheng
- Biomaterials Innovation Research Center, Division of Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.,Harvard-Massachusetts Institute of Technology, Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, USA.,Department of Orthopaedic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Rosa Chabok
- Biomaterials Innovation Research Center, Division of Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.,Harvard-Massachusetts Institute of Technology, Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, USA.,DeBusk College of Osteopathic Medicine, Lincoln Memorial University, Harrogate, TN, USA
| | - Mario Moisés Alvarez
- Biomaterials Innovation Research Center, Division of Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.,Harvard-Massachusetts Institute of Technology, Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, USA.,Microsystems Technologies Laboratories, MIT, Cambridge, MA, USA.,Centro de Biotecnología-FEMSA, Tecnológico de Monterrey, Monterrey, México
| | - Cesar de la Fuente-Nunez
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, Penn Institute for Computational Science, and Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - K Scott Phillips
- Division of Biology, Chemistry and Materials Science, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, US Food and Drug Administration, Silver Spring, MD, USA
| | - Ali Khademhosseini
- Department of Bioengineering, Henry Samueli School of Engineering and Applied Sciences, University of California-Los Angeles, Los Angeles, CA, USA.,Department of Radiology, David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, CA, USA.,Department of Chemical and Biomolecular Engineering, Henry Samueli School of Engineering and Applied Sciences, University of California-Los Angeles, Los Angeles, CA, USA.,Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA, USA.,Department of Bioindustrial Technologies, College of Animal Bioscience and Technology, Konkuk University, Seoul, Republic of Korea
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5
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Liu J, Li S, Liu L, Zhu Z. A fluorous biphase drug delivery system triggered by low frequency ultrasound: controlled release from perfluorous discoidal porous silicon particles. NANOSCALE ADVANCES 2020; 2:3561-3569. [PMID: 36134262 PMCID: PMC9419597 DOI: 10.1039/d0na00324g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 06/25/2020] [Indexed: 06/01/2023]
Abstract
Conventional drug delivery systems face unsatisfactory loading efficiency, poor biological bypass, and uncontrollable release, which are great barriers for improving the treatment of many diseases. Herein, a proof-of-concept of a fluorous biphase drug delivery system (FB-DDS) trigged by low frequency ultrasound (LFUS) is proposed for the first time, where promoted incorporation and stabilization of therapeutic agents in nanocarriers was achieved through fluorine-fluorine interactions, and the encapsulated drugs were controllably released by external sources, resulting in minimized nonspecific toxicity and enhanced therapeutic efficacy. The FB-DDS was constructed from monodisperse, discoidal porous silicon particles (PSP) and was functionalized with 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (FAS17) for loading perfluoropentane (PFP) and fluorinated drugs through fluorine-fluorine interactions. This delivery system was demonstrated by utilizing model compounds including a fluorous-tagged fluorescein and a fluorine containing antibiotic ciprofloxacin. Loading of the model molecules into fluorocarbon-coated carriers was facilitated by fluorous interactions, whereas ejection of the model molecules was promoted by applying LFUS to rapidly evaporate PFP. In the in vitro test, these carriers loaded with fluorine containing ciprofloxacin exhibited excellent antimicrobial activity against Pseudomonas aeruginosa biofilm formation. Overall, this innovative stimulus-responsive fluorous biphase drug delivery system will be a promising candidate for practical applications as well as encouraging further investigation of drug delivery and controlled release strategies.
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Affiliation(s)
- Jing Liu
- College of Materials Science and Engineering, Qingdao University of Science and Technology Qingdao Shandong China 266042
| | - Shuo Li
- College of Materials Science and Engineering, Qingdao University of Science and Technology Qingdao Shandong China 266042
| | - Lina Liu
- College of Materials Science and Engineering, Qingdao University of Science and Technology Qingdao Shandong China 266042
| | - Zhiling Zhu
- College of Materials Science and Engineering, Qingdao University of Science and Technology Qingdao Shandong China 266042
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6
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Antimicrobial coatings prepared from Dhvar-5-click-grafted chitosan powders. Acta Biomater 2019; 84:242-256. [PMID: 30528610 DOI: 10.1016/j.actbio.2018.12.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 11/22/2018] [Accepted: 12/04/2018] [Indexed: 11/22/2022]
Abstract
Antimicrobial peptides (AMP) are powerful components of the innate immune system, as they display wide activity spectrum and low tendency to induce pathogen resistance. Hence, the development of AMP-based coatings is a very promising strategy to prevent biomaterials-associated infections. This work aims to investigate if Dhvar-5-chitosan conjugates, previously synthesized by us via azide-alkyne "click" reaction, can be applied as antimicrobial coatings. Ultrathin coatings were prepared by spin coater after dissolving Dhvar-5-chitosan conjugate powder in aqueous acetic acid. Peptide orientation and exposure from the surface was confirmed by ellipsometry and contact angle measurements. Bactericidal activity was evaluated against Staphylococcus epidermidis, Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa, the most prevalent pathogens in implant-associated infections. Results showed that Dhvar-5-chitosan coatings displayed bactericidal effect. Moreover, since Dhvar-5 has head-to-tail amphipathicity, it was clear that the bactericidal potency was dependent on which domain of the peptide (cationic or hydrophobic) was exposed. In this context, Dhvar-5 immobilized through its C-terminus (exposing its hydrophobic end) presented higher antimicrobial activity against Gram-positive bacteria and reduced adhesion of Gram-negative bacteria. This orientation-dependent antimicrobial activity was further corroborated by the anti-biofilm assay, as covalent immobilization of Dhvar-5 through its C-terminus provided anti-biofilm properties to the chitosan thin film. Immobilization of Dhvar-5 showed no cytotoxic effect against HFF-1 cells, as both metabolic activity and cell morphology were similar to control. In conclusion, Dhvar-5-chitosan coatings are promising antimicrobial surfaces without cytotoxic effects against human cells. STATEMENT OF SIGNIFICANCE: AMP-tethering onto ground biomaterial is still a poorly explored strategy in research. In this work, AMP-tethered ground chitosan is used to produce highly antibacterial ultrathin films. Powdered AMP-tethered chitosan appears as an alternative solution for antimicrobial devices production, as it is suitable for large scale production, being easier to handle for fabrication of different coatings and materials with antimicrobial properties and without inducing toxicity.
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7
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Arslan M, Acik G, Tasdelen MA. The emerging applications of click chemistry reactions in the modification of industrial polymers. Polym Chem 2019. [DOI: 10.1039/c9py00510b] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Click chemistry reactions have been applied to the modification of major industrial polymers by analysing the synthetic approaches and the resulting material properties.
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Affiliation(s)
- Mehmet Arslan
- Department of Polymer Engineering
- Faculty of Engineering
- Yalova University
- 77100 Yalova
- Turkey
| | - Gokhan Acik
- Department of Polymer Engineering
- Faculty of Engineering
- Yalova University
- 77100 Yalova
- Turkey
| | - Mehmet Atilla Tasdelen
- Department of Polymer Engineering
- Faculty of Engineering
- Yalova University
- 77100 Yalova
- Turkey
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8
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Design of Antimicrobial Peptides: Progress Made with Human Cathelicidin LL-37. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1117:215-240. [PMID: 30980360 DOI: 10.1007/978-981-13-3588-4_12] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The incorporation of the innate immune system into humans is essential for survival and health due to the rapid replication of invading microbes and the delayed action of the adaptive immune system. Antimicrobial peptides are important components of human innate immunity. Over 100 such peptides have been identified in various human tissues. Human cathelicidin LL-37 is best studied, and there has been a growing interest in designing new peptides based on LL-37. This chapter describes the alternative processing of the human cathelicidin precursor, protease digestion, and lab cutting of LL-37. Both a synthetic peptide library and structure-based design are utilized to identify the active regions. Although challenging, the determination of the 3D structure of LL-37 enabled the identification of the core antimicrobial region. The minimal region of LL-37 can be function-dependent. We discuss the design and potential applications of LL-37 into antibacterial, antibiofilm, antiviral, antifungal, immune modulating, and anticancer peptides. LL-37 has been engineered into 17BIPHE2, a stable, selective, and potent antimicrobial, antibiofilm, and anticancer peptide. Both 17BIPHE2 and SAAP-148 can eliminate the ESKAPE pathogens and show topical in vivo antibiofilm efficacy. Also discussed are other application strategies, including peptide formulation, antimicrobial implants, and peptide-inducing factors such as vitamin D and sunlight. Finally, we summarize what we learned from peptide design based on human LL-37.
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9
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Click functionalization of thin films fabricated by roll-to-roll printing of thermoplastic/thermoset core-shell colloids. Colloid Polym Sci 2018. [DOI: 10.1007/s00396-018-4382-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Nishimori K, Kitahata S, Nishino T, Maruyama T. Controlling Surface Segregation of a Polymer To Display Carboxy Groups on an Outermost Surface Using Perfluoroacyl Groups. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6396-6404. [PMID: 29745670 DOI: 10.1021/acs.langmuir.8b00638] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Controlling the surface properties of solid polymers is important for practical applications. We here succeeded in controlling the surface segregation of polymers to display carboxy groups on an outermost surface, which allowed the covalent immobilization of functional molecules via the carboxy groups on a substrate surface. Random methacrylate-based copolymers containing carboxy groups, which were protected with perfluoroacyl (Rf) groups, were dip-coated on acrylic substrate surfaces. X-ray photoelectron spectroscopy and contact-angle measurements revealed that the Rf groups were segregated to the outermost surface of the dip-coated substrates. The Rf groups were removed by hydrolysis of the Rf esters in the copolymers, resulting in the display of carboxy groups on the surface. The quantification of carboxy groups on a surface revealed that the carboxy groups were reactive to a water-soluble solute in an aqueous solution. The surface segregation was affected by the molecular structure of the copolymer used for dip-coating.
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Affiliation(s)
- Keisuke Nishimori
- Department of Chemical Science and Engineering, Graduate School of Engineering , Kobe University , 1-1 Rokkodai , Nada-ku, Kobe 657-8501 , Japan
| | - Shigeru Kitahata
- Department of Chemical Science and Engineering, Graduate School of Engineering , Kobe University , 1-1 Rokkodai , Nada-ku, Kobe 657-8501 , Japan
| | - Takashi Nishino
- Department of Chemical Science and Engineering, Graduate School of Engineering , Kobe University , 1-1 Rokkodai , Nada-ku, Kobe 657-8501 , Japan
| | - Tatsuo Maruyama
- Department of Chemical Science and Engineering, Graduate School of Engineering , Kobe University , 1-1 Rokkodai , Nada-ku, Kobe 657-8501 , Japan
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11
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Flynn GE, Withers JM, Macias G, Sperling JR, Henry SL, Cooper JM, Burley GA, Clark AW. Reversible DNA micro-patterning using the fluorous effect. Chem Commun (Camb) 2018; 53:3094-3097. [PMID: 28243661 PMCID: PMC5358500 DOI: 10.1039/c7cc00288b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe a new method for the immobilisation of DNA into defined patterns with sub-micron resolution, using the fluorous effect. The method is fully reversible via a simple solvent wash, allowing the patterning, regeneration and re-patterning of surfaces with no degradation in binding efficiency following multiple removal/attachment cycles of different DNA sequences.
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Affiliation(s)
- Gabriella E Flynn
- Biomedical Engineering Research Division, School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow, UK.
| | - Jamie M Withers
- WestCHEM & Department of Pure & Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK.
| | - Gerard Macias
- Biomedical Engineering Research Division, School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow, UK.
| | - Justin R Sperling
- Biomedical Engineering Research Division, School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow, UK.
| | - Sarah L Henry
- Biomedical Engineering Research Division, School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow, UK.
| | - Jonathan M Cooper
- Biomedical Engineering Research Division, School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow, UK.
| | - Glenn A Burley
- WestCHEM & Department of Pure & Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK.
| | - Alasdair W Clark
- Biomedical Engineering Research Division, School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow, UK.
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12
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Sun H, Hong Y, Xi Y, Zou Y, Gao J, Du J. Synthesis, Self-Assembly, and Biomedical Applications of Antimicrobial Peptide-Polymer Conjugates. Biomacromolecules 2018. [PMID: 29539262 DOI: 10.1021/acs.biomac.8b00208] [Citation(s) in RCA: 154] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Antimicrobial peptides (AMPs) have been attracting much attention due to their excellent antimicrobial efficiency and low rate in driving antimicrobial resistance (AMR), which has been increasing globally to alarming levels. Conjugation of AMPs into functional polymers not only preserves excellent antimicrobial activities but reduces the toxicity and offers more functionalities, which brings new insight toward developing multifunctional biomedical materials such as hydrogels, polymer vesicles, polymer micelles, and so forth. These nanomaterials have been exhibiting excellent antimicrobial activity against a broad spectrum of bacteria including multidrug-resistant (MDR) ones, high selectivity, and low cytotoxicity, suggesting promising potentials in wound dressing, implant coating, antibiofilm, tissue engineering, and so forth. This Perspective seeks to highlight the state-of-the-art strategy for the synthesis, self-assembly, and biomedical applications of AMP-polymer conjugates and explore the promising directions for future research ranging from synthetic strategies, multistage and stimuli-responsive antibacterial activities, antifungi applications, and potentials in elimination of inflammation during medical treatment. It also will provide perspectives on how to stem the remaining challenges and unresolved problems in combating bacteria, including MDR ones.
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Affiliation(s)
- Hui Sun
- Department of Polymeric Materials, School of Materials Science and Engineering , Tongji University , 4800 Caoan Road , Shanghai 201804 , China
| | - Yuanxiu Hong
- Department of Polymeric Materials, School of Materials Science and Engineering , Tongji University , 4800 Caoan Road , Shanghai 201804 , China
| | - Yuejing Xi
- Department of Polymeric Materials, School of Materials Science and Engineering , Tongji University , 4800 Caoan Road , Shanghai 201804 , China
| | - Yijie Zou
- Department of Polymeric Materials, School of Materials Science and Engineering , Tongji University , 4800 Caoan Road , Shanghai 201804 , China
| | - Jingyi Gao
- Department of Polymeric Materials, School of Materials Science and Engineering , Tongji University , 4800 Caoan Road , Shanghai 201804 , China
| | - Jianzhong Du
- Department of Polymeric Materials, School of Materials Science and Engineering , Tongji University , 4800 Caoan Road , Shanghai 201804 , China.,Department of Orthopedics, Shanghai Tenth People's Hospital , Tongji University School of Medicine , Shanghai 200072 , China
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13
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Jeong GM, Seong H, Im SG, Sung BH, Kim SC, Jeong KJ. Coating of an antimicrobial peptide on solid substrate via initiated chemical vapor deposition. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2017.09.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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He J, Chen J, Hu G, Wang L, Zheng J, Zhan J, Zhu Y, Zhong C, Shi X, Liu S, Wang Y, Ren L. Immobilization of an antimicrobial peptide on silicon surface with stable activity by click chemistry. J Mater Chem B 2018; 6:68-74. [DOI: 10.1039/c7tb02557b] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We click an antimicrobial peptide onto a silicon substrate to protect it from enzymolysis using a polySBMA spacer.
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15
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Mishra B, Wang G. Titanium surfaces immobilized with the major antimicrobial fragment FK-16 of human cathelicidin LL-37 are potent against multiple antibiotic-resistant bacteria. BIOFOULING 2017; 33:544-555. [PMID: 28675109 PMCID: PMC5610571 DOI: 10.1080/08927014.2017.1332186] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 05/12/2017] [Indexed: 05/23/2023]
Abstract
Infections on implanted medical devices are a challenging problem, especially when bacteria form difficult-to-treat biofilms. Antimicrobial peptides are considered to be a solution due to their potency against antibiotic-resistant superbugs. Previously, the authors' laboratory demonstrated the prevention of staphylococcal biofilm formation in an animal catheter model by injecting merecidin (formerly known as 17BIPHE2), a peptide engineered based on the only human cathelicidin. This study documents an alternative solution via covalent immobilization of FK-16, amino acid sequence FKRIVQRIKDFLRNLV-amide, which corresponds to the major antimicrobial region (residues 17-32) of LL-37. FK-16 is superior to the longer peptide LL-37 in terms of synthesis cost and the shorter peptide KR-12 in terms of activity spectrum. Indeed, the FK16-coated titanium surface showed a broad-spectrum activity against the ESKAPE pathogens, including Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species. It also demonstrated anti-adhesion and biofilm inhibition capabilities against both S. aureus and E. coli.
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Affiliation(s)
- Biswajit Mishra
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, 986495 Nebraska Medical Center, Omaha, NE 68198-6495, USA
| | - Guangshun Wang
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, 986495 Nebraska Medical Center, Omaha, NE 68198-6495, USA
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16
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Qin G, Zhu Z, Li S, McDermott AM, Cai C. Development of ciprofloxacin-loaded contact lenses using fluorous chemistry. Biomaterials 2017; 124:55-64. [PMID: 28188995 DOI: 10.1016/j.biomaterials.2017.01.046] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 01/17/2017] [Accepted: 01/29/2017] [Indexed: 02/06/2023]
Abstract
In this work, we developed a simple method to load drugs into commercially available contact lenses utilizing fluorous chemistry. We demonstrated this method using model compounds including fluorous-tagged fluorescein and antibiotic ciprofloxacin. We showed that fluorous interactions facilitated the loading of model molecules into fluorocarbon-containing contact lenses, and that the release profiles exhibited sustained release. Contact lenses loaded with fluorous-tagged ciprofloxacin exhibited antimicrobial activity against Pseudomonas aeruginosa in vitro, while no cytotoxicity towards human corneal epithelial cells was observed. To mimic the tear turnover, we designed a porcine eye infection model under flow conditions. Significantly, the modified lenses also exhibited antimicrobial efficacy against Pseudomonas aeruginosa in the ex vivo infection model. Overall, utilizing fluorous chemistry, we can construct a drug delivery system that exhibits high drug loading capacity, sustained drug release, and robust biological activity.
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Affiliation(s)
- Guoting Qin
- College of Optometry, University of Houston, Houston, TX, 77204, USA.
| | - Zhiling Zhu
- Department of Chemistry, University of Houston, Houston, TX, 77204, USA
| | - Siheng Li
- Department of Chemistry, University of Houston, Houston, TX, 77204, USA
| | | | - Chengzhi Cai
- Department of Chemistry, University of Houston, Houston, TX, 77204, USA.
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17
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Cole MA, Scott TF, Mello CM. Bactericidal Hydrogels via Surface Functionalization with Cecropin A. ACS Biomater Sci Eng 2016; 2:1894-1904. [PMID: 33440526 DOI: 10.1021/acsbiomaterials.6b00266] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The immobilization of antimicrobial peptides (AMPs) to surfaces, enabling their utilization in biosensor and antibacterial/antifouling coating applications, is typically performed using rigid, solid support materials such as glass or gold and may require lengthy, temperamental protocols. Here, we employ a hydrogel immobilization platform to afford facile fabrication and surface functionalization while offering improved biocompatibility for evaluating the influence of linker length, surface density, and AMP conjugation site on retained peptide activity. Rapid, interfacial photo-polymerization using the radical-mediated thiol-ene addition mechanism was used to generate cross-linked, polymeric coatings bearing residual thiol moieties on prefabricated poly(ethylene glycol) (PEG)-based hydrogel supports. The photo-polymerized coatings were 60 μm thick and contained 0.55 nmol of unreacted free thiols, corresponding to a concentration of 410 μM, for use as cecropin A (CPA) immobilization handles via thiol-maleimide conjugation, where the CPA-bound maleimide moiety was localized at either the carboxyl terminus or midsequence between Ala22 and Gly23. Surface presentation of the thiol handles was controlled by varying the thiolated PEG monomer (PEGSH) used in the photo-polymerizable formulation. Bactericidal activity of CPA functionalized hydrogels against E. coli K235 indicated that CPA immobilized at the carboxyl terminus killed 94 ± 6% of the inoculated pathogens when coatings were prepared with high molecular weight PEGSH and 99 ± 1% when prepared with low molecular weight PEGSH. E. coli cell death demonstrated a stronger dependence on peptide concentration than PEG linker length or degree of thiol functionalization, with activity ranging from 34 ± 13% to 99 ± 1% bacterial cells killed as the prefunctionalization thiol concentration in the coatings was increased from 90 to 990 μM. Finally, the immobilization site on the surface-bound CPA strongly affected antibacterial activity; when midsequence modified CPA was bound to a hydrogel coating bearing 990 μM thiol, only 20 ± 4% of the E. coli population was killed.
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Affiliation(s)
- Megan A Cole
- U.S. Army Natick Soldier Research, Development, and Engineering Center, Natick, Massachusetts 01760, United States
| | - Timothy F Scott
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States.,Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Charlene M Mello
- U.S. Army Natick Soldier Research, Development, and Engineering Center, Natick, Massachusetts 01760, United States
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18
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Wronska MA, O'Connor IB, Tilbury MA, Srivastava A, Wall JG. Adding Functions to Biomaterial Surfaces through Protein Incorporation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:5485-5508. [PMID: 27164952 DOI: 10.1002/adma.201504310] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 03/16/2016] [Indexed: 06/05/2023]
Abstract
The concept of biomaterials has evolved from one of inert mechanical supports with a long-term, biologically inactive role in the body into complex matrices that exhibit selective cell binding, promote proliferation and matrix production, and may ultimately become replaced by newly generated tissues in vivo. Functionalization of material surfaces with biomolecules is critical to their ability to evade immunorecognition, interact productively with surrounding tissues and extracellular matrix, and avoid bacterial colonization. Antibody molecules and their derived fragments are commonly immobilized on materials to mediate coating with specific cell types in fields such as stent endothelialization and drug delivery. The incorporation of growth factors into biomaterials has found application in promoting and accelerating bone formation in osteogenerative and related applications. Peptides and extracellular matrix proteins can impart biomolecule- and cell-specificities to materials while antimicrobial peptides have found roles in preventing biofilm formation on devices and implants. In this progress report, we detail developments in the use of diverse proteins and peptides to modify the surfaces of hard biomaterials in vivo and in vitro. Chemical approaches to immobilizing active biomolecules are presented, as well as platform technologies for isolation or generation of natural or synthetic molecules suitable for biomaterial functionalization.
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Affiliation(s)
- Małgorzata A Wronska
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| | - Iain B O'Connor
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| | - Maura A Tilbury
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| | - Akshay Srivastava
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| | - J Gerard Wall
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
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19
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Zhu Y, Zhang HB, Ding LJ, Chen Z, Sun DY, Jiang ZH. Synthesis and properties of perfluorocarbon chain terminated poly(ether sulfone). RSC Adv 2016. [DOI: 10.1039/c6ra17615a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Perfluorocarbon groups or related compounds are usually used to modify polymer materials because of their low surface energy properties.
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Affiliation(s)
- Ye Zhu
- Engineering Research Center of High Performance Plastic
- Ministry of Education
- College of Chemistry
- Jilin University
- Changchun 130012
| | - Hai-Bo Zhang
- Engineering Research Center of High Performance Plastic
- Ministry of Education
- College of Chemistry
- Jilin University
- Changchun 130012
| | - Lian-Jun Ding
- Engineering Research Center of High Performance Plastic
- Ministry of Education
- College of Chemistry
- Jilin University
- Changchun 130012
| | - Zheng Chen
- Engineering Research Center of High Performance Plastic
- Ministry of Education
- College of Chemistry
- Jilin University
- Changchun 130012
| | - Da-Ye Sun
- Engineering Research Center of High Performance Plastic
- Ministry of Education
- College of Chemistry
- Jilin University
- Changchun 130012
| | - Zhen-Hua Jiang
- Engineering Research Center of High Performance Plastic
- Ministry of Education
- College of Chemistry
- Jilin University
- Changchun 130012
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20
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Contreras-Caceres R, Santos CM, Li S, Kumar A, Zhu Z, Kolar SS, Casado-Rodriguez MA, Huang Y, McDermott A, Lopez-Romero JM, Cai C. Modification of fluorous substrates with oligo(ethylene glycol) via "click" chemistry for long-term resistance of cell adhesion. J Colloid Interface Sci 2015. [PMID: 26210101 DOI: 10.1016/j.jcis.2015.07.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
In this work perfluorinated substrates fabricated from SiO2 glass slides are modified with oligo(ethylene glycol) (OEG) units for long-term resistance of cell adhesion purposes, based on fluorous interactions and click chemistry. Specifically, fluorous substrates, prepared by treatment of glass slides with 1H, 1H, 2H, 2H-perfluorodecyltrimethoxysilane (FAS17), were coated with ethynyl-OEG-C8F17, followed by covalent attachment of an azido-OEG via copper-catalyzed azide-alkyne cycloaddition (CuAAC) "click" reaction. We demonstrate that the resultant surface avoid fibrinogen adsorption and resisted cell adhesion for over 14days. X-ray photoemission spectroscopy (XPS) analysis and contact angle goniometry measurements confirm the presence of the OEG molecules on the fluorous substrates. Bright field optical images show total absence of 3T3 fibroblast cells on the OEG modified fluorinated substrate for 1 and 5days, and a remarkably decrease of cell adhesion at 14days.
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Affiliation(s)
- Rafael Contreras-Caceres
- Department of Chemistry, University of Houston, Houston, TX 77204, USA; Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Málaga, 29071, Spain.
| | | | - Siheng Li
- Department of Chemistry, University of Houston, Houston, TX 77204, USA.
| | - Amit Kumar
- Department of Chemistry, University of Houston, Houston, TX 77204, USA.
| | - Zhiling Zhu
- Department of Chemistry, University of Houston, Houston, TX 77204, USA.
| | - Satya S Kolar
- College of Optometry, University of Houston, Houston, TX 77204, USA.
| | | | - Yongkai Huang
- Department of Chemistry, University of Houston, Houston, TX 77204, USA.
| | - Alison McDermott
- College of Optometry, University of Houston, Houston, TX 77204, USA.
| | | | - Chengzhi Cai
- Department of Chemistry, University of Houston, Houston, TX 77204, USA.
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21
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Shakiba A, Jamison AC, Lee TR. Poly(L-lysine) Interfaces via Dual Click Reactions on Surface-Bound Custom-Designed Dithiol Adsorbates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6154-63. [PMID: 25961498 DOI: 10.1021/acs.langmuir.5b00877] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Surfaces modified with poly(L-lysine) can be used to immobilize selected biomolecules electrostatically. This report describes the preparation of a set of self-assembled monolayers (SAMs) from three different azide-terminated adsorbates as platforms for performing controlled surface attachments and as a means of determining the parameters that afford stable poly(L-lysine)-modified SAM surfaces having controlled packing densities. A maleimide-terminated alkyne linker was "clicked" to the azide-terminated surfaces via a copper-catalyzed cycloaddition reaction to produce the attachment sites for the polypeptides. A thiol-Michael addition was then used to immobilize cysteine-terminated poly(L-lysine) moieties on the gold surface, avoiding adsorbate self-reactions with this two-step procedure. Each step in this process was analyzed by ellipsometry, X-ray photoelectron spectroscopy, polarization modulation infrared reflection-absorption spectroscopy, and contact angle goniometry to determine which adsorbate structure most effectively produced the targeted polypeptide interface. Additionally, a series of mixed SAMs using an azidoalkanethiol in combination with a normal alkanethiol having an equivalent alkyl chain were prepared to provide data to determine how dilution of the azide reactive site on the SAM surface influences the initial click reaction. Overall, the collected data demonstrate the advantages of an appropriately designed bidentate absorbate and its potential to form effective platforms for biomolecule surface attachment via click reactions.
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Affiliation(s)
- Amin Shakiba
- Departments of Chemistry and Chemical Engineering and the Texas Center for Superconductivity, University of Houston, Houston, Texas 77204-5003, United States
| | - Andrew C Jamison
- Departments of Chemistry and Chemical Engineering and the Texas Center for Superconductivity, University of Houston, Houston, Texas 77204-5003, United States
| | - T Randall Lee
- Departments of Chemistry and Chemical Engineering and the Texas Center for Superconductivity, University of Houston, Houston, Texas 77204-5003, United States
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22
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Hydrophobic Mg–Al layered double hydroxide film on aluminum: Fabrication and microbiologically influenced corrosion resistance properties. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.03.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Kolar SSN, Luca V, Baidouri H, Mannino G, McDermott AM, Mangoni ML. Esculentin-1a(1-21)NH2: a frog skin-derived peptide for microbial keratitis. Cell Mol Life Sci 2014; 72:617-627. [PMID: 25086859 DOI: 10.1007/s00018-014-1694-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 07/17/2014] [Accepted: 07/24/2014] [Indexed: 01/09/2023]
Abstract
Pseudomonas aeruginosa is the primary bacterial pathogen causing contact lens related keratitis. Available ophthalmic agents have reduced efficacy and antimicrobial peptides (AMPs) hold promise as future antibiotics. Here we investigated the in vitro and in vivo anti-Pseudomonal activity of esculentin-1a(1-21)NH2, derived from a frog skin AMP. The data revealed a minimum inhibitory concentration between 2 and 16 μM against reference strains or drug-resistant clinical isolates of P. aeruginosa without showing toxicity to human corneal epithelial cells up to 50 μM. At 1 μM the peptide rapidly killed bacterial cells and this activity was fully retained in 150 mM sodium chloride and 70 % (v/v) human basal tears, particularly against the virulent ATCC 19660 strain. Furthermore, its dropwise administration at 40 μM to the ocular surface in a murine model of P. aeruginosa keratitis (three times daily, for 5 days post-infection) resulted in a significant reduction of infection. The mean clinical score was 2.89 ± 0.26 compared to 3.92 ± 0.08 for the vehicle control. In addition, the corneal level of viable bacteria in the peptide treated animals was significantly lower with a difference of 4 log10 colony counts, compared to 7.7 log10 cells recovered in the control. In parallel, recruitment of inflammatory cells was reduced by half compared to that found in the untreated eyes. Similar results were obtained when esculentin-1a(1-21)NH2 was applied prior to induction of keratitis. Overall, our findings highlight esculentin-1a(1-21)NH2 as an attractive candidate for the development of novel topical pharmaceuticals against Pseudomonas keratitis.
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Affiliation(s)
- Satya Sree N Kolar
- College of Optometry, The Ocular Surface Institute, University of Houston, Houston, TX, USA
| | - Vincenzo Luca
- Department of Biochemical Sciences "A. Rossi Fanelli", Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University of Rome, Via degli Apuli 9, 00185, Rome, Italy
| | - Hasna Baidouri
- College of Optometry, The Ocular Surface Institute, University of Houston, Houston, TX, USA
| | - Giuseppe Mannino
- Ophthalmology Unit, NESMOS Department, S. Andrea Hospital, Faculty of Medicine and Psychology, Sapienza University of Rome, Rome, Italy
| | - Alison M McDermott
- College of Optometry, The Ocular Surface Institute, University of Houston, Houston, TX, USA
| | - Maria Luisa Mangoni
- Department of Biochemical Sciences "A. Rossi Fanelli", Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University of Rome, Via degli Apuli 9, 00185, Rome, Italy.
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