1
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Marmo AC, Grunlan MA. Biomedical Silicones: Leveraging Additive Strategies to Propel Modern Utility. ACS Macro Lett 2023; 12:172-182. [PMID: 36669481 PMCID: PMC10848296 DOI: 10.1021/acsmacrolett.2c00701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 01/18/2023] [Indexed: 01/21/2023]
Abstract
Silicones have a long history of use in biomedical devices, with unique properties stemming from the siloxane (Si-O-Si) backbone that feature a high degree of flexibility and chemical stability. However, surface, rheological, mechanical, and electrical properties of silicones can limit their utility. Successful modification of silicones to address these limitations could lead to superior and new biomedical devices. Toward improving such properties, recent additive strategies have been leveraged to modify biomedical silicones and are highlighted herein.
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Affiliation(s)
- Alec C. Marmo
- Department
of Materials Science and Engineering Texas
A&M University, College
Station, Texas 77843-3003, United States
| | - Melissa A. Grunlan
- Department
of Biomedical Engineering, Department of Materials Science and Engineering,
Department of Chemistry Texas A&M University, College Station, Texas 77843-3003, United
States
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2
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Novel Silicone-Grafted Alginate as a Drug Delivery Scaffold: Pharmaceutical Characterization of Gliclazide-Loaded Silicone-Based Composite Microcapsules. Pharmaceutics 2023; 15:pharmaceutics15020530. [PMID: 36839852 PMCID: PMC9960830 DOI: 10.3390/pharmaceutics15020530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 01/29/2023] [Accepted: 02/01/2023] [Indexed: 02/09/2023] Open
Abstract
A novel gliclazide-loaded elastomeric carbohydrate pharmaceutical vehicle was successfully developed. This new siliconized alginate platform showed pseudoplastic rheology with a zeta potential ranging from (-43.8 mV to -75.5 mV). A Buchi-B390 encapsulator was employed to formulate different types of silicone-grafted alginate microcapsules loaded with gliclazide relying on the vibrational ionic gelation technology. The use of tetraethyl orthosilicate (TEOS) to crosslink the silicone elastomer (hydroxy terminated polydimethylsiloxane) of this new platform had improved the gliclazide encapsulation (>92.13% ± 0.76) of the free-flowing composite microcapsules, which showed good mechanical durability (up to 12 h in PBS pH 6.8) and promising results to sustain the drug release.
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3
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Ultrasonication-induced and diluent-assisted suspension polymerization for size-controllable synthesis of polydimethylsiloxane droplets. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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4
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Galdiero E, Ricciardelli A, D'Angelo C, de Alteriis E, Maione A, Albarano L, Casillo A, Corsaro MM, Tutino ML, Parrilli E. Pentadecanoic acid against Candida albicans-Klebsiella pneumoniae biofilm: towards the development of an anti-biofilm coating to prevent polymicrobial infections. Res Microbiol 2021; 172:103880. [PMID: 34563667 DOI: 10.1016/j.resmic.2021.103880] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/07/2021] [Accepted: 09/09/2021] [Indexed: 12/15/2022]
Abstract
The ability to form biofilms is a common feature of microorganisms, which can colonize a variety of surfaces, such as host tissues and medical devices, resulting in infections highly resistant to conventional drugs. This aspect is particularly critical in polymicrobial biofilms involving both fungi and bacteria, therefore, to eradicate such severe infections, new and effective anti-biofilm strategies are needed. The efficacy of pentadecanal and pentadecanoic acid as anti-biofilm agents has been recently reported against different bacterial strains. Their chemical similarity with diffusible signal factors (DSFs), plus the already known ability of fatty acids to act as anti-biofilm agents, suggested to explore their use against Candida albicans and Klebsiella pneumoniae mixed biofilm. In this work, we demonstrated the ability of both molecules to prevent the formation and destabilize the structure of the dual-species biofilm. Moreover, the pentadecanoic acid anti-biofilm coating, previously developed through the adsorption of the fatty acid on polydimethylsiloxane (PDMS), was proved to prevent the polymicrobial biofilm formation in dynamic conditions by confocal laser scanning microscopy analysis. Finally, the evaluation of the expression levels of some biofilm-related genes of C. albicans and K. pneumoniae treated with pentadecanoic acid provided some insights into the molecular mechanisms underpinning its anti-biofilm effect.
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Affiliation(s)
- E Galdiero
- Department of Biology, University of Naples Federico II, Complesso Universitario Monte Santangelo, Via Cinthia 21, 80126, Naples, Italy
| | - A Ricciardelli
- Department of Chemical Sciences, University of Naples Federico II, 80125, Naples, Italy
| | - C D'Angelo
- Department of Chemical Sciences, University of Naples Federico II, 80125, Naples, Italy
| | - E de Alteriis
- Department of Biology, University of Naples Federico II, Complesso Universitario Monte Santangelo, Via Cinthia 21, 80126, Naples, Italy
| | - A Maione
- Department of Biology, University of Naples Federico II, Complesso Universitario Monte Santangelo, Via Cinthia 21, 80126, Naples, Italy
| | - L Albarano
- Department of Biology, University of Naples Federico II, Complesso Universitario Monte Santangelo, Via Cinthia 21, 80126, Naples, Italy; Department of Chemical Sciences, University of Naples Federico II, 80125, Naples, Italy; Department of Marine Biothecnology, Stazione Zoologica Anton Dohrn Villa Comunale, 80121, Naples, Italy
| | - A Casillo
- Department of Chemical Sciences, University of Naples Federico II, 80125, Naples, Italy
| | - M M Corsaro
- Department of Chemical Sciences, University of Naples Federico II, 80125, Naples, Italy
| | - M L Tutino
- Department of Chemical Sciences, University of Naples Federico II, 80125, Naples, Italy
| | - E Parrilli
- Department of Chemical Sciences, University of Naples Federico II, 80125, Naples, Italy.
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5
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Maiti A, Small W, Kroonblawd MP, Lewicki JP, Goldman N, Wilson TS, Saab AP. Constitutive Model of Radiation Aging Effects in Filled Silicone Elastomers under Strain. J Phys Chem B 2021; 125:10047-10057. [PMID: 34450004 DOI: 10.1021/acs.jpcb.1c04958] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Filled silicone elastomers, an essential component in many technological applications, are often subjected to controlled or unintended radiation for a variety of reasons. Radiation exposure can lead to permanent mechanical and structural changes in the material, which is manifested as altered mechanical response, and in some cases, a permanent set. For unfilled elastomers, network theories developed and refined over decades can explain these effects in terms of chain-scission and cross-link formation and a hypothesis involving independent networks formed at different strain levels of the material. Here, we expose a filled silicone rubber to gamma radiation while being under finite elongational strain and show that the observed mechanical and structural changes can be quantitatively modeled within the same theoretical framework developed for unfilled elastomers as long as nuances associated with the Mullins effect are accounted for in a consistent manner. In this work, we employ Ogden's incompressible hyperelastic model within the framework of Tobolsky's two-network scheme to describe the observed permanent set and mechanical modulus changes as a function of radiation dosage. In the process, we conclude that gamma radiation induces both direct cross-linking at chain crossings (H-links) and main-chain-scission followed by cross-linking (Y-links). We provide an estimate of the ratio of chain-scission to cross-linking rates, which is in reasonable agreement with previous experimental estimate from Charlesby-Pinner analysis. We use density functional theory (DFT)-based quantum mechanical calculations to explore the stability of -Si and -SiO radicals that form upon a radiation-induced chain-scission event, which sheds light on the relative rates of Y-linking and H-linking processes.
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Affiliation(s)
- A Maiti
- Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - W Small
- Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - M P Kroonblawd
- Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - J P Lewicki
- Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - N Goldman
- Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - T S Wilson
- Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - A P Saab
- Lawrence Livermore National Laboratory, Livermore, California 94550, United States
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6
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Liangliang Yang, Liu F, Zhao Q. Influencing Factors of Collagen-I Grafting on Chitosan/Methyl Vinyl Silicone Rubber. POLYMER SCIENCE SERIES B 2021. [DOI: 10.1134/s1560090421030131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Aymes-Chodur C, Salmi-Mani H, Dragoe D, Aubry-Barroca N, Buchotte M, Roger P. Optimization of microwave plasma treatment conditions on polydimethylsiloxane films for further surface functionalization. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110416] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Hanifi S, Farahmandghavi F, Imani M. RAFT-derived siloxane-based amphiphilic triblock copolymers: Synthesis, characterization, and self-assembly. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109874] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Modification of PDMS with acrylic acid and acrylic acid/ethylene glycol dimethacrylate by simultaneous polymerization assisted by gamma radiation. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108754] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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10
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Ricciardelli A, Casillo A, Corsaro MM, Tutino ML, Parrilli E, van der Mei HC. Pentadecanal and pentadecanoic acid coatings reduce biofilm formation of Staphylococcus epidermidis on PDMS. Pathog Dis 2020; 78:5762676. [PMID: 32105313 DOI: 10.1093/femspd/ftaa012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 02/26/2020] [Indexed: 12/23/2022] Open
Abstract
Staphylococcus epidermidis is well known to be one of the major causes of infections related to medical devices, mostly due to its strong capacity to form device-associated biofilms. Nowadays, these infections represent a severe burden to the public health system and the necessity of novel antibacterial strategies for the treatment of these difficult-to-eradicate infections is urgent. The Antarctic marine bacterium Pseudoalteromonas haloplanktis TAC125 was found to be able to produce an anti-biofilm molecule, the pentadecanal, active against S. epidermidis. In this work, we modified one of the most widely used silicone-based polymers, polydimethylsiloxane (PDMS), by adsorption of pentadecanal and its most promising derivative, pentadecanoic acid, on the PDMS surface. The biofilm formation of S. epidermidis RP62A on both untreated and modified PDMS was performed in a parallel plate flow chamber system, demonstrating the capability of the proposed anti-biofilm coatings to strongly reduce the biofilm formation. Furthermore, drug-release capacity and long-term efficacy (21 days) were also proven for the pentadecanoic acid coating.
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Affiliation(s)
- Annarita Ricciardelli
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126 Naples, Italy.,Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy
| | - Angela Casillo
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126 Naples, Italy
| | - Maria Michela Corsaro
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126 Naples, Italy
| | - Maria Luisa Tutino
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126 Naples, Italy
| | - Ermenegilda Parrilli
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126 Naples, Italy
| | - Henny C van der Mei
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
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11
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Williams DL, Epperson RT, Ashton NN, Taylor NB, Kawaguchi B, Olsen RE, Haussener TJ, Sebahar PR, Allyn G, Looper RE. In vivo analysis of a first-in-class tri-alkyl norspermidine-biaryl antibiotic in an active release coating to reduce the risk of implant-related infection. Acta Biomater 2019; 93:36-49. [PMID: 30710710 DOI: 10.1016/j.actbio.2019.01.055] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 01/24/2019] [Accepted: 01/28/2019] [Indexed: 12/31/2022]
Abstract
Prosthetic joint infection (PJI) is a well-known and persisting problem. Active release coatings have promise to provide early protection to an implant by eradicating small colony biofilm contaminants or planktonic bacteria that can form biofilm. Traditional antibiotics can be limited as active release agents in that they have limited effect against biofilms and develop resistance at sub-lethal concentrations. A unique first-in-class compound (CZ-01127) was assessed as the active release agent in a silicone (Si)-based coating to prevent PJI in a sheep model of joint space infection. Titanium (Ti) plugs contained a porous coated Ti (PCTi) region and polymer-coated region. Plugs were implanted into a femoral condyle of sheep to assess the effect of the Si polymer on cancellous bone ingrowth, the effect of CZ-01127 on bone ingrowth, and the ability of CZ-01127 to prevent PJI. Microbiological results showed that CZ-01127 was able to eradicate bacteria in the local region of the implanted plugs. Data further showed that Si did not adversely affect bone ingrowth. However, bacteria that reached the joint space (synovium) were not fully eradicated. Outcomes suggested that the CZ-01127 coating provided local protection to the implant system in a challenging model, the design of which could be beneficial for testing future antimicrobial therapies for PJI. STATEMENT OF SIGNIFICANCE: Periprosthetic joint infection (PJI) is now commonplace, and constitutes an underlying problem that patients and physicians face. Active release antibiotic coatings have potential to prevent these infections. Traditional antibiotics are limited in their ability to eradicate bacteria that reside in biofilms, and are more susceptible to resistance development. This study addressed these limitations by testing the efficacy of a unique antimicrobial compound in a coating that was tested in a challenging sheep model of PJI. The unique coating was able to eradicate bacteria and prevent infection in the environment adjacent to the implant. Bacteria that escaped into the joint space still caused infection, yet benchmark data can be used to optimize the coating and translate it toward clinical use.
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Affiliation(s)
- Dustin L Williams
- George E. Wahlen Department of Veterans Affairs, Salt Lake City, UT, United States; Department of Orthopaedics, University of Utah, Salt Lake City, UT, United States; Department of Pathology, University of Utah, Salt Lake City, UT, United States; Department of Bioengineering, University of Utah, Salt Lake City, UT, United States; Department of Physical Medicine and Rehabilitation, Uniformed Services University of the Health Sciences, Bethesda, MD, United States; Curza Global, LLC, Salt Lake City, UT, United States.
| | - Richard T Epperson
- George E. Wahlen Department of Veterans Affairs, Salt Lake City, UT, United States; Department of Orthopaedics, University of Utah, Salt Lake City, UT, United States
| | - Nicholas N Ashton
- George E. Wahlen Department of Veterans Affairs, Salt Lake City, UT, United States; Department of Orthopaedics, University of Utah, Salt Lake City, UT, United States
| | - Nicholas B Taylor
- George E. Wahlen Department of Veterans Affairs, Salt Lake City, UT, United States; Department of Orthopaedics, University of Utah, Salt Lake City, UT, United States
| | - Brooke Kawaguchi
- George E. Wahlen Department of Veterans Affairs, Salt Lake City, UT, United States; Department of Orthopaedics, University of Utah, Salt Lake City, UT, United States
| | - Raymond E Olsen
- George E. Wahlen Department of Veterans Affairs, Salt Lake City, UT, United States; Department of Orthopaedics, University of Utah, Salt Lake City, UT, United States
| | - Travis J Haussener
- Curza Global, LLC, Salt Lake City, UT, United States; Synthetic and Medicinal Chemistry Core, University of Utah, Salt Lake City, UT, United States
| | - Paul R Sebahar
- Curza Global, LLC, Salt Lake City, UT, United States; Synthetic and Medicinal Chemistry Core, University of Utah, Salt Lake City, UT, United States
| | - Gina Allyn
- George E. Wahlen Department of Veterans Affairs, Salt Lake City, UT, United States; Department of Orthopaedics, University of Utah, Salt Lake City, UT, United States
| | - Ryan E Looper
- Curza Global, LLC, Salt Lake City, UT, United States; Synthetic and Medicinal Chemistry Core, University of Utah, Salt Lake City, UT, United States; Department of Chemistry, University of Utah, Salt Lake City, UT, United States
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12
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Kalulu M, Oderinde O, Wei Y, Zhang C, Hussain I, Han X, Jiang Y. Robust solvent‐free fabrication and characterization of (polydimethylsiloxane‐co‐2‐hydroxyethylmethacrylate)/poly (ethylene glycol) methacrylate (PDMS‐HEMA)/PEGMA hydrogels. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4623] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Mulenga Kalulu
- School of Chemistry and Chemical EngineeringJiangsu Province Hi‐Tech Key Laboratory for Biomedical Research Jiangning, Southeast University Nanjing China
- Department of Chemistry, School of Natural SciencesThe University of Zambia Lusaka Zambia
| | - Olayinka Oderinde
- School of Chemistry and Chemical EngineeringJiangsu Province Hi‐Tech Key Laboratory for Biomedical Research Jiangning, Southeast University Nanjing China
| | - Ying‐Ying Wei
- School of Chemistry and Chemical EngineeringJiangsu Province Hi‐Tech Key Laboratory for Biomedical Research Jiangning, Southeast University Nanjing China
| | - Chuan Zhang
- School of Chemistry and Chemical EngineeringJiangsu Province Hi‐Tech Key Laboratory for Biomedical Research Jiangning, Southeast University Nanjing China
| | - Imtiaz Hussain
- School of Chemistry and Chemical EngineeringJiangsu Province Hi‐Tech Key Laboratory for Biomedical Research Jiangning, Southeast University Nanjing China
| | - Xue‐Lian Han
- Hydron Contact Lens Co., Ltd, R&D Center Danyang China
| | - Yong Jiang
- School of Chemistry and Chemical EngineeringJiangsu Province Hi‐Tech Key Laboratory for Biomedical Research Jiangning, Southeast University Nanjing China
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13
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Tan Y, Leonhard M, Moser D, Ma S, Schneider-Stickler B. Inhibition of mixed fungal and bacterial biofilms on silicone by carboxymethyl chitosan. Colloids Surf B Biointerfaces 2016; 148:193-199. [PMID: 27595894 DOI: 10.1016/j.colsurfb.2016.08.061] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Revised: 08/01/2016] [Accepted: 08/30/2016] [Indexed: 01/01/2023]
Abstract
Mixed biofilms with fungi and bacteria are the leading cause for the failure of medical silicone devices, such as voice prostheses in laryngectomy. In this study, we determined the effect of carboxymethyl chitosan (CM-chitosan) on mixed biofilm formation of fungi and bacteria on silicone which is widely used for construction of medical devices. Mixed biofilm formations were inhibited 72.87% by CM-chitosan. Furthermore, CM-chitosan significantly decreased the metabolic activity of the biofilms using 2, 3-bis (2-methoxy-4-nitro-5-sulfo-phenyl)-2H-tetrazolium-5 carboxanilide (XTT) reduction assay. The examination using confocal laser scanning microscopy and scanning electron microscope confirmed that CM-chitosan inhibited the mixed biofilm and damaged the cells. Effects of CM-chitosan on different stages of biofilms were also evaluated. CM-chitosan inhibited the adhesion of fungi and bacteria with an efficiency of >90%. It prevented biofilm formation at efficiencies of 69.86%, 50.88% and 46.58% when CM-chitosan was added at 90min, 12h and 24h after biofilm initiation, respectively. Moreover, CM-chitosan inhibited Candida yeast-to-hyphal transition. CM-chitosan was not only able to inhibit the metabolic activity of biofilms, but also active upon the establishment and development of biofilm. Therefore, CM-chitosan may serve as a possible antibiofilm agent to limit biofilm formation on voice prostheses.
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Affiliation(s)
- Yulong Tan
- Department of Otorhinolaryngology and Head and Neck Surgery, Medical University of Vienna, Vienna, Austria.
| | - Matthias Leonhard
- Department of Otorhinolaryngology and Head and Neck Surgery, Medical University of Vienna, Vienna, Austria.
| | - Doris Moser
- Department of Cranio-Maxillofacial and Oral Surgery, Medical University of Vienna, Vienna, Austria.
| | - Su Ma
- Food Biotechnology Laboratory, Department of Food Sciences and Technology, BOKU-University of Natural Resources and Life Sciences, 1190 Vienna, Austria.
| | - Berit Schneider-Stickler
- Department of Otorhinolaryngology and Head and Neck Surgery, Medical University of Vienna, Vienna, Austria.
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14
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John AA, Subramanian AP, Vellayappan MV, Balaji A, Jaganathan SK, Mohandas H, Paramalinggam T, Supriyanto E, Yusof M. Review: physico-chemical modification as a versatile strategy for the biocompatibility enhancement of biomaterials. RSC Adv 2015. [DOI: 10.1039/c5ra03018h] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Physico-chemical modification induced improvement in biocompatibility of materials.
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Affiliation(s)
- A. A. John
- IJN-UTM Cardiovascular Engineering Centre
- Faculty of Biosciences and Medical Engineering
- Universiti Teknologi Malaysia
- Johor Bahru 81310
- Malaysia
| | - A. P. Subramanian
- IJN-UTM Cardiovascular Engineering Centre
- Faculty of Biosciences and Medical Engineering
- Universiti Teknologi Malaysia
- Johor Bahru 81310
- Malaysia
| | - M. V. Vellayappan
- IJN-UTM Cardiovascular Engineering Centre
- Faculty of Biosciences and Medical Engineering
- Universiti Teknologi Malaysia
- Johor Bahru 81310
- Malaysia
| | - A. Balaji
- IJN-UTM Cardiovascular Engineering Centre
- Faculty of Biosciences and Medical Engineering
- Universiti Teknologi Malaysia
- Johor Bahru 81310
- Malaysia
| | - S. K. Jaganathan
- IJN-UTM Cardiovascular Engineering Centre
- Faculty of Biosciences and Medical Engineering
- Universiti Teknologi Malaysia
- Johor Bahru 81310
- Malaysia
| | - H. Mohandas
- Department of Biomedical Engineering
- University of Texas Arlington
- Texas
- USA
| | - T. Paramalinggam
- Department of Chemistry
- Faculty of Science
- Universiti Teknologi Malaysia
- Johor Bahru 81310
- Malaysia
| | - E. Supriyanto
- IJN-UTM Cardiovascular Engineering Centre
- Faculty of Biosciences and Medical Engineering
- Universiti Teknologi Malaysia
- Johor Bahru 81310
- Malaysia
| | - M. Yusof
- IJN-UTM Cardiovascular Engineering Centre
- Faculty of Biosciences and Medical Engineering
- Universiti Teknologi Malaysia
- Johor Bahru 81310
- Malaysia
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15
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Talpaert MJ, Balfour A, Stevens S, Baker M, Muhlschlegel FA, Gourlay CW. Candida biofilm formation on voice prostheses. J Med Microbiol 2014; 64:199-208. [PMID: 25106862 DOI: 10.1099/jmm.0.078717-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Laryngopharyngeal malignancy is treated with radiotherapy and/or surgery. When total laryngectomy is required, major laryngeal functions (phonation, airway control, swallowing and coughing) are affected. The insertion of a silicone rubber voice prosthesis in a surgically created tracheoesophageal puncture is the most effective method for voice rehabilitation. Silicone, as is the case with other synthetic materials such as polymethylmethacrylate, polyurethane, polyvinyl chloride, polypropylene and polystyrene, has the propensity to become rapidly colonized by micro-organisms (mainly Candida albicans) forming a biofilm, which leads to the failure of the devices. Silicone is used within voice prosthetic devices because of its flexible properties, which are essential for valve function. Valve failure, as well as compromising speech, may result in aspiration pneumonia, and repeated valve replacement may lead to either tract stenosis or insufficiency. Prevention and control of biofilm formation are therefore crucial for the lifespan of the prosthesis and promotion of tracheoesophageal tissue and lung health. To date, the mechanisms of biofilm formation on voice prostheses are not fully understood. Further studies are therefore required to identify factors influencing Candida biofilm formation. This review describes the factors known to influence biofilm formation on voice prostheses and current strategies employed to prolong their life by interfering with microbial colonization.
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Affiliation(s)
- Moira J Talpaert
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury CT2 7NJ, UK
| | - Alistair Balfour
- Ear, Nose and Throat Services, East Kent Hospitals University NHS Foundation Trust, The William Harvey Hospital, Kennington Road, Ashford TN24 0LZ, UK
| | - Sarah Stevens
- Macmillan Speech and Language Therapy Services, Kent and Canterbury Hospital, Ethelbert Road, Canterbury CT1 3NG, UK
| | - Mark Baker
- Clinical Microbiology Service, East Kent Hospitals University NHS Foundation Trust, The William Harvey Hospital, Kennington Road, Ashford TN24 0LZ, UK
| | - Fritz A Muhlschlegel
- Clinical Microbiology Service, East Kent Hospitals University NHS Foundation Trust, The William Harvey Hospital, Kennington Road, Ashford TN24 0LZ, UK
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury CT2 7NJ, UK
| | - Campbell W Gourlay
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury CT2 7NJ, UK
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16
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Savoji H, Hadjizadeh A, Maire M, Ajji A, Wertheimer MR, Lerouge S. Electrospun Nanofiber Scaffolds and Plasma Polymerization: A Promising Combination Towards Complete, Stable Endothelial Lining for Vascular Grafts. Macromol Biosci 2014; 14:1084-95. [DOI: 10.1002/mabi.201300545] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 02/10/2014] [Indexed: 12/31/2022]
Affiliation(s)
- Houman Savoji
- Laboratory of Endovascular Biomaterials (LBeV); Research Centre, Centre Hospitalier de l'Université de Montréal (CRCHUM); 900 Saint Denis Street Montreal QC H2X 0A9 Canada
- Institute of Biomedical Engineering; École Polytechnique de Montréal; Montreal QC H3C 3A7 Canada
| | - Afra Hadjizadeh
- Department of Chemical Engineering; École Polytechnique de Montréal; Montreal QC H3C 3A7 Canada
| | - Marion Maire
- Laboratory of Endovascular Biomaterials (LBeV); Research Centre, Centre Hospitalier de l'Université de Montréal (CRCHUM); 900 Saint Denis Street Montreal QC H2X 0A9 Canada
| | - Abdellah Ajji
- Institute of Biomedical Engineering; École Polytechnique de Montréal; Montreal QC H3C 3A7 Canada
- Department of Chemical Engineering; École Polytechnique de Montréal; Montreal QC H3C 3A7 Canada
| | - Michael R. Wertheimer
- Institute of Biomedical Engineering; École Polytechnique de Montréal; Montreal QC H3C 3A7 Canada
- Department of Engineering Physics; École Polytechnique de Montréal; Montreal QC H3C 3A7 Canada
| | - Sophie Lerouge
- Laboratory of Endovascular Biomaterials (LBeV); Research Centre, Centre Hospitalier de l'Université de Montréal (CRCHUM); 900 Saint Denis Street Montreal QC H2X 0A9 Canada
- Department of Mechanical Engineering; École de technologie supérieure; Montreal QC H3C 1K3 Canada
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17
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Maiti A, Small W, Gee RH, Weisgraber TH, Chinn SC, Wilson TS, Maxwell RS. Mullins effect in a filled elastomer under uniaxial tension. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:012602. [PMID: 24580250 DOI: 10.1103/physreve.89.012602] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Indexed: 06/03/2023]
Abstract
Modulus softening and permanent set in filled polymeric materials due to cyclic loading and unloading, commonly known as the Mullins effect, can have a significant impact on their use as support cushions. A quantitative analysis of such behavior is essential to ensure the effectiveness of such materials in long-term deployment. In this work we combine existing ideas of filler-induced modulus enhancement, strain amplification, and irreversible deformation within a simple non-Gaussian constitutive model to quantitatively interpret recent measurements on a relevant PDMS-based elastomeric cushion. We find that the experimental stress-strain data is consistent with the picture that during stretching (loading) two effects take place simultaneously: (1) the physical constraints (entanglements) initially present in the polymer network get disentangled, thus leading to a gradual decrease in the effective cross-link density, and (2) the effective filler volume fraction gradually decreases with increasing strain due to the irreversible pulling out of an initially occluded volume of the soft polymer domain.
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Affiliation(s)
- A Maiti
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - W Small
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R H Gee
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T H Weisgraber
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S C Chinn
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T S Wilson
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R S Maxwell
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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18
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Williams DL, Sinclair KD, Jeyapalina S, Bloebaum RD. Characterization of a novel active release coating to prevent biofilm implant-related infections. J Biomed Mater Res B Appl Biomater 2013; 101:1078-89. [DOI: 10.1002/jbm.b.32918] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Revised: 01/24/2013] [Accepted: 01/30/2013] [Indexed: 01/16/2023]
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19
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Joshi V, Srividhya M, Dubey M, Ghosh AK, Saxena A. Effect of functionalization on dispersion of POSS-silicone rubber nanocomposites. J Appl Polym Sci 2013. [DOI: 10.1002/app.39112] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Oh SH, Lee JH. Hydrophilization of synthetic biodegradable polymer scaffolds for improved cell/tissue compatibility. Biomed Mater 2013; 8:014101. [DOI: 10.1088/1748-6041/8/1/014101] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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21
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Salati A, Keshvari H, Karkhaneh A, Taranejoo S. Design and Fabrication of Artificial Skin: Chitosan and Gelatin Immobilization on Silicone by Poly Acrylic Acid Graft Using a Plasma Surface Modification Method. J MACROMOL SCI B 2011. [DOI: 10.1080/00222348.2010.549438] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Amir Salati
- a Faculty of Biomedical Engineering , Amirkabir University of Technology , Tehran, Iran
| | - Hamid Keshvari
- a Faculty of Biomedical Engineering , Amirkabir University of Technology , Tehran, Iran
| | - Akbar Karkhaneh
- b Faculty of Biomedical Engineering , Islamic Azad University, Science and Research Branch , Tehran, Iran
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22
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Sun Z, Qiang W, Li H, Hao N, Xu D, Chen HY. Electric detection of DNA with PDMS microgap electrodes and silver nanoparticles. Analyst 2010; 136:540-4. [PMID: 21079881 DOI: 10.1039/c0an00512f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work a novel microdevice sensor has been developed by plating gold on the PDMS surface to generate a sandwich-type gap electrode for DNA detection. The microdevice utilizes a gold band electrode-PDMS-gold band electrode configuration and the minimum detectable volume could be as low as 5 μL. The 20 μm PDMS-based gap was chemically modified with DNA capture probes and DNA sandwich hybrids were formed with the addition of DNA target and silver nanoparticle probes. To increase detection sensitivity, parallel detection zones have been developed in which the relevant resistances decrease substantially upon hybridyzation. By measuring the change in electrical conductivity, the DNA target in the concentration range of 1000-0.1 nM can be assayed and the limit of lowest detectable concentration was achieved at 0.01 nM.
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Affiliation(s)
- Ziyin Sun
- Key Lab of Analytical Chemistry for Life Science, Ministry of Education, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu, China
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23
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Vargün E, Usanmaz A. Synthesis and surface properties of polydimethylsiloxane-based block copolymers: poly[dimethylsiloxane-block- (ethyl methacrylate)] and poly[dimethylsiloxane-block-(hydroxyethyl methacrylate)]. POLYM INT 2010. [DOI: 10.1002/pi.2890] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Esteves A, Brokken-Zijp J, Laven J, Huinink H, Reuvers N, Van M, de With G. Influence of cross-linker concentration on the cross-linking of PDMS and the network structures formed. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.06.022] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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25
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Tovar F, Escobedo C, Rodríguez G, García J, Vilá A, Corona F, Sacristán E. Structural performance and hydrodynamic resistance of a new silicone auricular cannula tip. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2008; 2006:5396-9. [PMID: 17947139 DOI: 10.1109/iembs.2006.260204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Development of a new generation pneumatic of Ventricular Assist Device (VAD) required the design of cannulae to improve its optimal performance. In this case, a relevant restrictive design parameter was the material of the cannulae. Silicone was the best choice in a hemocompatible focus, but this is a material with very low stiffness. If the material is flexible, the most important parameter that affects either the structural performance or the hydrodynamic resistance is the amount of side holes on the cannulae tip, known as the effective drainage area. In order to obtain an estimation of the structural performance and of the hydrodynamic resistance, a study based on two independent analysis is needed: the structural and the in vitro drop pressure analysis. Structural analyses based on computer simulations were made in order to estimate the bending behavior of four silicone prototypes of cannulae tips. On the other hand, experiments under hydrostatic conditions were made to test and compare the pressure loss and flow rate relationship. A cannula tip with six side holes showed good hydrostatic performance, having almost the same as the one with nine side holes. Plus, it presented and a satisfactory structural behavior. This study assisted the design process of an auricular silicone cannula, recommending the use of cannulae with six side holes for a specific VAD.
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Affiliation(s)
- F Tovar
- Innovamédica S.A. de C.V., Iztapalapa, México
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26
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Wang Q, Liu L, Yang W. High Efficient Grafting Polymerization of Styrene on Surface of NBR Latex and Physical Properties of NBR/NBR-g-PSt Composite. Polym J 2008. [DOI: 10.1295/polymj.pj2007114] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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27
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Ma Z, Mao Z, Gao C. Surface modification and property analysis of biomedical polymers used for tissue engineering. Colloids Surf B Biointerfaces 2007; 60:137-57. [PMID: 17683921 DOI: 10.1016/j.colsurfb.2007.06.019] [Citation(s) in RCA: 332] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2006] [Revised: 06/14/2007] [Accepted: 06/19/2007] [Indexed: 11/18/2022]
Abstract
The response of host organism in macroscopic, cellular and protein levels to biomaterials is, in most cases, closely associated with the materials' surface properties. In tissue engineering, regenerative medicine and many other biomedical fields, surface engineering of the bio-inert synthetic polymers is often required to introduce bioactive species that can promote cell adhesion, proliferation, viability and enhanced ECM-secretion functions. Up to present, a large number of surface engineering techniques for improving biocompatibility have been well established, the work of which generally contains three main steps: (1) surface modification of the polymeric materials; (2) chemical and physical characterizations; and (3) biocompatibility assessment through cell culture. This review focuses on the principles and practices of surface engineering of biomedical polymers with regards to particular aspects depending on the authors' research background and opinions. The review starts with an introduction of principles in designing polymeric biomaterial surfaces, followed by introduction of surface modification techniques to improve hydrophilicity, to introduce reactive functional groups and to immobilize functional protein molecules. The chemical and physical characterizations of the modified biomaterials are then discussed with emphasis on several important issues such as surface functional group density, functional layer thickness, protein surface density and bioactivity. Three most commonly used surface composition characterization techniques, i.e. ATR-FTIR, XPS, SIMS, are compared in terms of their penetration depth. Ellipsometry, CD, EPR, SPR and QCM's principles and applications in analyzing surface proteins are introduced. Finally discussed are frequently applied methods and their principles to evaluate biocompatibility of biomaterials via cell culture. In this section, current techniques and their developments to measure cell adhesion, proliferation, morphology, viability, migration and gene expression are reviewed.
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Affiliation(s)
- Zuwei Ma
- Department of Polymer Science and Engineering, Zhejiang University, and Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Hangzhou 310027, China
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28
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Rodrigues L, Banat IM, Teixeira J, Oliveira R. Strategies for the prevention of microbial biofilm formation on silicone rubber voice prostheses. J Biomed Mater Res B Appl Biomater 2007; 81:358-70. [PMID: 17022068 DOI: 10.1002/jbm.b.30673] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Total laryngectomy, a surgical treatment for extensive cancer of larynx, which alters swallowing and respiration in patients, is followed up with a surgical voice restoration procedure comprising tracheoesophageal puncture techniques with insertion of a "voice prosthesis" to improve successful voice rehabilitation. However, microbial colonization is a major drawback of these devices. Antimicrobials are usually used to prevent the colonization of silicone rubber voice prostheses by microorganisms. However, long-term medication induces the development of resistant strains with all associated risks and the development of alternative prophylactic and therapeutic agents, including probiotics and biosurfactants, have been suggested. The inhibition of microbial growth on surfaces can also be achieved by several other techniques involving the modification of physicochemical properties of the biomaterial surface or the covalently binding of antimicrobial agents to the biomaterial surface. An overview of the different approaches investigated to date and future perspectives to reduce the frequent replacements of voice prostheses in laryngectomized patients through microbial biofilm retardation is presented and discussed.
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Affiliation(s)
- Lígia Rodrigues
- Centro de Engenharia Biológica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
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29
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Karkhaneh A, Mirzadeh H, Ghaffariyeh AR. Simultaneous graft copolymerization of 2-hydroxyethyl methacrylate and acrylic acid onto polydimethylsiloxane surfaces using a two-step plasma treatment. J Appl Polym Sci 2007. [DOI: 10.1002/app.26216] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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31
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Abbasi F, Mirzadeh H. Properties of poly(dimethylsiloxane)/hydrogel multicomponent systems. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/polb.10559] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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