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Miar S, Gonzales G, Dion G, Ong JL, Malka R, Bizios R, Branski RC, Guda T. Electrospun composite-coated endotracheal tubes with controlled siRNA and drug delivery to lubricate and minimize upper airway injury. Biomaterials 2024; 309:122602. [PMID: 38768544 DOI: 10.1016/j.biomaterials.2024.122602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 04/25/2024] [Accepted: 05/02/2024] [Indexed: 05/22/2024]
Abstract
Endotracheal Tubes (ETTs) maintain and secure a patent airway; however, prolonged intubation often results in unintended injury to the mucosal epithelium and inflammatory sequelae which complicate recovery. ETT design and materials used have yet to adapt to address intubation associated complications. In this study, a composite coating of electrospun polycaprolactone (PCL) fibers embedded in a four-arm polyethylene glycol acrylate matrix (4APEGA) is developed to transform the ETT from a mechanical device to a dual-purpose device capable of delivering multiple therapeutics while preserving coating integrity. Further, the composite coating system (PCL-4APEGA) is capable of sustained delivery of dexamethasone from the PCL phase and small interfering RNA (siRNA) containing polyplexes from the 4APEGA phase. The siRNA is released rapidly and targets smad3 for immediate reduction in pro-fibrotic transforming growth factor-beta 1 (TGFϐ1) signaling in the upper airway mucosa as well as suppressing long-term sequelae in inflammation from prolonged intubation. A bioreactor was used to study mucosal adhesion to the composite PCL-4APEGA coated ETTs and investigate continued mucus secretory function in ex vivo epithelial samples. The addition of the 4APEGA coating and siRNA delivery to the dexamethasone delivery was then evaluated in a swine model of intubation injury and observed to restore mechanical function of the vocal folds and maintain epithelial thickness when observed over 14 days of intubation. This study demonstrated that increase in surface lubrication paired with surface stiffness reduction significantly decreased fibrotic behavior while reducing epithelial adhesion and abrasion.
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Affiliation(s)
- Solaleh Miar
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, USA; Department of Civil, Environmental, and Biomedical Engineering, University of Hartford, West Hartford, CT, USA.
| | - Gabriela Gonzales
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, USA.
| | - Gregory Dion
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
| | - Joo L Ong
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, USA.
| | - Ronit Malka
- Department of Otolaryngology - Head and Neck Surgery, Brooke Army Medical Center, JBSA, Fort Sam Houston, TX, 78234, USA.
| | - Rena Bizios
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, USA.
| | - Ryan C Branski
- Departments of Rehabilitation Medicine and Otolaryngology-Head and Neck Surgery, NYU Grossman School of Medicine, New York, NY, USA.
| | - Teja Guda
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, USA; Department of Cell Systems and Anatomy, University of Texas Health San Antonio, San Antonio, TX, USA.
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2
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Gonzales G, Malka R, Marinelli L, Lee CM, Miar S, Cook S, Dion GR, Guda T. Endotracheal tubes with dexamethasone eluting electrospun coating improve tissue mechanical function after upper airway injury. Sci Rep 2024; 14:2821. [PMID: 38308093 PMCID: PMC10837152 DOI: 10.1038/s41598-024-53328-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 01/31/2024] [Indexed: 02/04/2024] Open
Abstract
Corticosteroid-eluting endotracheal tubes (ETTs) were developed and employed in a swine laryngotracheal injury model to maintain airway patency and provide localized drug delivery to inhibit fibrotic scarring. Polycaprolactone (PCL) fibers with or without dexamethasone were electrospun onto the ETT surface PCL-only coated ETTs and placed in native airways of 18 Yorkshire swine. Regular and dexamethasone-PCL coated ETTs were placed in airways of another 18 swine injured by inner laryngeal mucosal abrasion. All groups were evaluated after 3, 7 and 14 days (n = 3/treatment/time). Larynges were bisected and localized stiffness determined by normal indentation, then sequentially matched with histological assessment. In the native airway, tissue stiffness with PCL-only ETT placement increased significantly from 3 to 7 days (p = 0.0016) and 3 to 14 days (p < 0.0001) while dexamethasone-PCL ETT placement resulted in stiffness decreasing from 7 to 14 days (p = 0.031). In the injured airway, localized stiffness at 14 days was significantly greater after regular ETT placement (23.1 ± 0.725 N/m) versus dexamethasone-PCL ETTs (17.10 ± 0.930 N/m, p < 0.0001). Dexamethasone-loaded ETTs were found to reduce laryngotracheal tissue stiffening after simulated intubation injury compared to regular ETTs, supported by a trend of reduced collagen in the basement membrane in injured swine over time. Findings suggest localized corticosteroid delivery allows for tissue stiffness control and potential use as an approach for prevention and treatment of scarring caused by intubation injury.
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Affiliation(s)
- Gabriela Gonzales
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, 1 UTSA Circle, San Antonio, TX, 78249, USA
| | - Ronit Malka
- Department of Otolaryngology - Head and Neck Surgery, Brooke Army Medical Center, JBSA, Fort Sam Houston, TX, 78234, USA
| | - Lisa Marinelli
- Department of Pathology and Area Laboratory Services, Brooke Army Medical Center, JBSA, Fort Sam Houston, TX, 78234, USA
| | - Christine M Lee
- Department of Pathology and Area Laboratory Services, Brooke Army Medical Center, JBSA, Fort Sam Houston, TX, 78234, USA
| | - Solaleh Miar
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, 1 UTSA Circle, San Antonio, TX, 78249, USA
- Department of Civil, Environmental, and Biomedical Engineering, University of Hartford, West Hartford, CT, 06117, USA
| | - Stacy Cook
- Department of Otolaryngology - Head and Neck Surgery, Brooke Army Medical Center, JBSA, Fort Sam Houston, TX, 78234, USA
| | - Gregory R Dion
- Department of Otolaryngology - Head and Neck Surgery, University of Cincinnati College of Medicine, University of Cincinnati Medical Center, 231 Albert Sabin Way, Cincinnati, OH, 45267, USA.
| | - Teja Guda
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, 1 UTSA Circle, San Antonio, TX, 78249, USA.
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3
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Li B, Zhang L, Xie Y, Lei L, Qu W, Sui L. Evaluation of pharmacokinetics and safety of a long-term estradiol-releasing stent in rat uterine. Regen Ther 2022; 21:494-501. [PMID: 36313395 PMCID: PMC9596602 DOI: 10.1016/j.reth.2022.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 09/15/2022] [Accepted: 10/05/2022] [Indexed: 11/06/2022] Open
Abstract
Purpose Intrauterine adhesion (IUA), often leading to gynecological complications including amenorrhea, abdominal pain and infertility, is frequently induced by injuries to the endometrium. Hence it would be of great benefit to take efforts to prevent adhesion after intrauterine operations. Orally administration of 17β-estradiol (E2) is commonly used to promote endometrium regeneration, but is limited by low concentrations at the injured sites. We aim at preparing an E2-releasing uterine stent, which could improve the efficiency of E2 therapy and be utilized for IUA prevention. Methods We designed a silicone rubber stent, which could be implanted in the uterine cavity and continuously release E2 in long term. Stents were placed in rodent uterine, and removed at different time points. Remaining E2 in stent was measured by high performance liquid chromatography (HPLC), and organ E2 concentrations were detected by enzyme-linked immuno sorbent assay (ELISA). Endometrium morphology was examined by histological staining of paraffin sections. Results Our stent showed a controlled release of E2 in rodent uterine for over 60 days, and significantly increased E2 concentration in serum and in situ uterine. After the stent was removed from uterine, E2 rapidly reverted to a normal level. Also, the stent did not induce pathological changes in endometrium. Conclusions The uterine stent provided abundant local E2 in uterine cavity with satisfactory safety. The silicone rubber based E2-releasing uterine stent could be further advanced by adjusting its shape and E2 load for its clinical application, and might promisingly help lowering the incidence of IUA. The silicone rubber uterine stent continuously released E2 in long term. The E2-releasing uterine stent revealed more efficient E2 delivery capacity than orally administrated E2. The E2-releasing uterine stent is safe for endometrium and remote organs.
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Affiliation(s)
- Boning Li
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai 200011, China
| | - Lu Zhang
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China,Obstetrics and Gynecology Hospital, Center of Diagnosis and Treatment for Cervical Diseases, Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China
| | - Yu Xie
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai 200011, China
| | - Lei Lei
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai 200011, China
| | - Wenjie Qu
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai 200011, China
| | - Long Sui
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China,Obstetrics and Gynecology Hospital, Center of Diagnosis and Treatment for Cervical Diseases, Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai 200011, China,Corresponding author. Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China.
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4
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Wang Y, Liu S, Ding K, Zhang Y, Ding X, Mi J. Quaternary tannic acid with improved leachability and biocompatibility for antibacterial medical thermoplastic polyurethane catheters. J Mater Chem B 2021; 9:4746-4762. [PMID: 34095937 DOI: 10.1039/d1tb00227a] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The surfaces of indwelling catheters offer sites for the adherence of bacteria to form biofilms, leading to various infections. Therefore, the development of antibacterial materials for catheters is imperative. In this study, combining the strong antibacterial effect of a quaternary ammonium salt (QAS) and the high biocompatibility of tannic acid (TA), we prepared a quaternary tannic acid (QTA) by grafting a synthesized quaternary ammonium salt, dimethyl dodecyl 6-bromohexyl ammonium bromide, onto TA. To prepare antibacterial catheters, QTA was blended with thermoplastic polyurethane (TPU) via melt extrusion, which is a convenient and easy-to-control process. Characterization of the TPU blends showed that compared with those of the QAS, dissolution rate and biocompatibility of QTA were significantly improved. On the premise that the introduction of QTA had only a slight effect on the original mechanical properties of pristine TPU, the prepared TPU/QTA maintained satisfactory antibacterial activities in vitro, under a flow state, as well as in vivo. The results verified that the TPU/QTA blend with a QTA content of 4% is effective, durable, stable, and non-toxic, and exhibits significant potential as a raw material for catheters.
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Affiliation(s)
- Yue Wang
- Key Laboratory of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology), Ministry of Education, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, No. 15 Beisanhuandong Road, Beijing, 100029, China.
| | - Shuaizhen Liu
- Key Laboratory of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology), Ministry of Education, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, No. 15 Beisanhuandong Road, Beijing, 100029, China.
| | - Kaidi Ding
- Worcester Polytechnic Institute, 100 Institute Road, Worcester, Massachusetts 01609-2280, USA
| | - Yaocheng Zhang
- Key Laboratory of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology), Ministry of Education, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, No. 15 Beisanhuandong Road, Beijing, 100029, China.
| | - Xuejia Ding
- Key Laboratory of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology), Ministry of Education, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, No. 15 Beisanhuandong Road, Beijing, 100029, China.
| | - Jianguo Mi
- Key Laboratory of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology), Ministry of Education, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, No. 15 Beisanhuandong Road, Beijing, 100029, China.
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5
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Liu J, Yao X, Ye J, Zhang C, Lin H, Fu J. A printing-spray-transfer process for attaching biocompatible and antibacterial coatings to the surfaces of patient-specific silicone stents. ACTA ACUST UNITED AC 2020; 15:055036. [PMID: 32503025 DOI: 10.1088/1748-605x/ab99d6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
An antibacterial coating with stable antibacterial properties and favorable biocompatibility is recognized as an effective method to prevent bacterial adhesion and biofilm formation on biomedical implant surfaces. In this study, a convenient and low-cost printing-spray-transfer process was proposed that enables reliably attaching antibacterial and biocompatible coatings to patient-specific silicone implant surfaces. A desktop three-dimensional printer was used to print the mold of silicone implant molds according to the characteristics of the diseased areas. Multiwalled carbon nanotubes (MWCNTs) uniformly decorated with silver nanoparticles (AgNPs/CNTs) were synthesized as the antibacterial materials for the spray process. The well-distributed AgNPs/CNT coating was anchored to the silicone surface through an in-mold transfer printing process. Stable adhesion of the coatings was assessed via tape testing and UV-vis spectra. Hardly any AgNPs/CNTs peeled off the substrate, and the adhesion was rated at 4B. Antibacterial activity, Ag release, cell viability and morphology were further assessed, revealing high antibacterial activity and great biocompatibility. The process proposed herein has potential applications for fabricating stable antibacterial coatings on silicone implant surfaces, especially for patient-specific silicone implants such as silicone tracheal stents.
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Affiliation(s)
- Jiapeng Liu
- State Key Laboratory of Fluid Power & Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China. Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
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Otto DP, de Villiers MM. Layer-By-Layer Nanocoating of Antiviral Polysaccharides on Surfaces to Prevent Coronavirus Infections. Molecules 2020; 25:E3415. [PMID: 32731428 PMCID: PMC7435837 DOI: 10.3390/molecules25153415] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 07/24/2020] [Accepted: 07/26/2020] [Indexed: 12/28/2022] Open
Abstract
In 2020, the world is being ravaged by the coronavirus, SARS-CoV-2, which causes a severe respiratory disease, Covid-19. Hundreds of thousands of people have succumbed to the disease. Efforts at curing the disease are aimed at finding a vaccine and/or developing antiviral drugs. Despite these efforts, the WHO warned that the virus might never be eradicated. Countries around the world have instated non-pharmaceutical interventions such as social distancing and wearing of masks in public to curb the spreading of the disease. Antiviral polysaccharides provide the ideal opportunity to combat the pathogen via pharmacotherapeutic applications. However, a layer-by-layer nanocoating approach is also envisioned to coat surfaces to which humans are exposed that could harbor pathogenic coronaviruses. By coating masks, clothing, and work surfaces in wet markets among others, these antiviral polysaccharides can ensure passive prevention of the spreading of the virus. It poses a so-called "eradicate-in-place" measure against the virus. Antiviral polysaccharides also provide a green chemistry pathway to virus eradication since these molecules are primarily of biological origin and can be modified by minimal synthetic approaches. They are biocompatible as well as biodegradable. This surface passivation approach could provide a powerful measure against the spreading of coronaviruses.
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Affiliation(s)
- Daniel P. Otto
- Research Focus Area for Chemical Resource Beneficiation, Laboratory for Analytical Services, Faculty of Natural and Agricultural Sciences, North-West University, Potchefstroom 2531, South Africa
| | - Melgardt M. de Villiers
- Division of Pharmaceutical Sciences–Drug Delivery, School of Pharmacy, University of Wisconsin-Madison, 777 Highland Ave, Madison, WI 53705, USA;
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7
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Naruse T, Hanada Y. Rapid, high-quality microfabrication of thermoset polymer PDMS using laser-induced bubbles. OPTICS EXPRESS 2019; 27:9429-9438. [PMID: 31045094 DOI: 10.1364/oe.27.009429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 03/07/2019] [Indexed: 06/09/2023]
Abstract
Bubbles can be formed by focusing a high-power laser in a liquid. Based on this phenomenon, the present study demonstrated a novel technique, referred to as microFabrication using Laser-Induced Bubbles (microFLIB), for the microfabrication of the thermoset polymer polydimethylsiloxane (PDMS). A conventional nanosecond green laser was focused at the interface between uncured PDMS and a metal target and scanned to generate a line of bubbles at the boundary. The hemispherical shapes of these bubbles produced a groove on the rear side of the PDMS substrate following subsequent thermal curing. After the fabrication of such specimens, metal films could be selectively deposited along the grooves by electroless plating. This process allows rapid, high-quality microfluidic fabrication with potential applications to biochips.
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8
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Dobrynin MV, Pretorius C, Kama DV, Roodt A, Boyarskiy VP, Islamova RM. Rhodium(I)-catalysed cross-linking of polysiloxanes conducted at room temperature. J Catal 2019. [DOI: 10.1016/j.jcat.2019.03.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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Shahrour H, Ferrer-Espada R, Dandache I, Bárcena-Varela S, Sánchez-Gómez S, Chokr A, Martinez-de-Tejada G. AMPs as Anti-biofilm Agents for Human Therapy and Prophylaxis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1117:257-279. [PMID: 30980362 DOI: 10.1007/978-981-13-3588-4_14] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Microbial cells show a strong natural tendency to adhere to surfaces and to colonize them by forming complex communities called biofilms. In this growth mode, biofilm-forming cells encase themselves inside a dense matrix which efficiently protects them against antimicrobial agents and effectors of the immune system. Moreover, at the physiological level, biofilms contain a very heterogeneous cell population including metabolically inactive organisms and persisters, which are highly tolerant to antibiotics. The majority of human infectious diseases are caused by biofilm-forming microorganisms which are responsible for pathologies such as cystic fibrosis, infective endocarditis, pneumonia, wound infections, dental caries, infections of indwelling devices, etc. AMPs are well suited to combat biofilms because of their potent bactericidal activity of broad spectrum (including resting cells and persisters) and their ability to first penetrate and then to disorganize these structures. In addition, AMPs frequently synergize with antimicrobial compounds and were recently reported to repress the molecular pathways leading to biofilm formation. Finally, there is a very active research to develop AMP-containing coatings that can prevent biofilm formation by killing microbial cells on contact or by locally releasing their active principle. In this chapter we will describe these strategies and discuss the perspectives of the use of AMPs as anti-biofilm agents for human therapy and prophylaxis.
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Affiliation(s)
- Hawraa Shahrour
- Department of Microbiology and Parasitology, University of Navarra, Pamplona, Spain.,Laboratory of Microbiology, Department of Life & Earth Sciences, Faculty of Sciences I, Lebanese University, Hadat campus, Beirut, Lebanon.,Platform of Research and Analysis in Environmental Sciences (PRASE), Doctoral School of Sciences and Technologies, Lebanese University, Hadat Campus, Beirut, Lebanon
| | - Raquel Ferrer-Espada
- Department of Microbiology and Parasitology, University of Navarra, Pamplona, Spain.,Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Israa Dandache
- Laboratory of Microbiology, Department of Life & Earth Sciences, Faculty of Sciences I, Lebanese University, Hadat campus, Beirut, Lebanon.,Platform of Research and Analysis in Environmental Sciences (PRASE), Doctoral School of Sciences and Technologies, Lebanese University, Hadat Campus, Beirut, Lebanon
| | | | | | - Ali Chokr
- Laboratory of Microbiology, Department of Life & Earth Sciences, Faculty of Sciences I, Lebanese University, Hadat campus, Beirut, Lebanon.,Platform of Research and Analysis in Environmental Sciences (PRASE), Doctoral School of Sciences and Technologies, Lebanese University, Hadat Campus, Beirut, Lebanon
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10
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Zhou C, Song H, Loh JLC, She J, Deng L, Liu B. Grafting antibiofilm polymer hydrogel film onto catheter by SARA SI-ATRP. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2018; 29:2106-2123. [DOI: 10.1080/09205063.2018.1507268] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Chao Zhou
- Institute of Biomedical Engineering and Health Sciences, Changzhou University, Changzhou, Jiangsu, China
| | - Hongqin Song
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
| | - Jia Ling Celestine Loh
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
| | - Jueqin She
- College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, Hunan, China
| | - Linhong Deng
- Institute of Biomedical Engineering and Health Sciences, Changzhou University, Changzhou, Jiangsu, China
| | - Bo Liu
- College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, Hunan, China
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11
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Puciul-Malinowska A, Zapotoczny S. Robust nanocoatings based on ionic silicones. NANOSCALE 2018; 10:12497-12504. [PMID: 29931021 DOI: 10.1039/c8nr03090a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Two oppositely charged water-soluble oligosiloxanes with the same main chain were synthesized and used for the formation of multilayer nanocoatings. In spite of low molecular weight of the components, due to entropic reasons, linearly growing and robust films with a hydrophilic surface were formed for the first time. The multilayer films were found to be resistant to high temperature water treatment undergoing only reversible swelling and no surface recovery was observed after prolonged exposure to air indicating permanent water wettability of these silicone-based coatings. High flexibility of the silicone chains resulted in low glass transition temperature (ca. 27 °C) of both dry polyplexes and films as determined using calorimetry and spectroscopic ellipsometry, respectively. Moreover, the thin coating was applied on plasma-treated poly(dimethylsiloxane) preventing surface reconstruction in air and leading to long-lasting hydrophilization of the surface (water contact angles around 65°). Such water-borne systems may be used in common applications of silicones providing high flexibility and at the same time water wettability of the coatings.
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12
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Zhang J, Rector J, Lin JQ, Young JH, Sans M, Katta N, Giese N, Yu W, Nagi C, Suliburk J, Liu J, Bensussan A, DeHoog RJ, Garza KY, Ludolph B, Sorace AG, Syed A, Zahedivash A, Milner TE, Eberlin LS. Nondestructive tissue analysis for ex vivo and in vivo cancer diagnosis using a handheld mass spectrometry system. Sci Transl Med 2018; 9:9/406/eaan3968. [PMID: 28878011 DOI: 10.1126/scitranslmed.aan3968] [Citation(s) in RCA: 243] [Impact Index Per Article: 40.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 08/17/2017] [Indexed: 12/13/2022]
Abstract
Conventional methods for histopathologic tissue diagnosis are labor- and time-intensive and can delay decision-making during diagnostic and therapeutic procedures. We report the development of an automated and biocompatible handheld mass spectrometry device for rapid and nondestructive diagnosis of human cancer tissues. The device, named MasSpec Pen, enables controlled and automated delivery of a discrete water droplet to a tissue surface for efficient extraction of biomolecules. We used the MasSpec Pen for ex vivo molecular analysis of 20 human cancer thin tissue sections and 253 human patient tissue samples including normal and cancerous tissues from breast, lung, thyroid, and ovary. The mass spectra obtained presented rich molecular profiles characterized by a variety of potential cancer biomarkers identified as metabolites, lipids, and proteins. Statistical classifiers built from the histologically validated molecular database allowed cancer prediction with high sensitivity (96.4%), specificity (96.2%), and overall accuracy (96.3%), as well as prediction of benign and malignant thyroid tumors and different histologic subtypes of lung cancer. Notably, our classifier allowed accurate diagnosis of cancer in marginal tumor regions presenting mixed histologic composition. Last, we demonstrate that the MasSpec Pen is suited for in vivo cancer diagnosis during surgery performed in tumor-bearing mouse models, without causing any observable tissue harm or stress to the animal. Our results provide evidence that the MasSpec Pen could potentially be used as a clinical and intraoperative technology for ex vivo and in vivo cancer diagnosis.
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Affiliation(s)
- Jialing Zhang
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - John Rector
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, USA.,Department of Biomedical Engineering, University of Texas at Austin, Austin, TX 78712, USA
| | - John Q Lin
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Jonathan H Young
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Marta Sans
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Nitesh Katta
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX 78712, USA
| | - Noah Giese
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Wendong Yu
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Chandandeep Nagi
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030, USA
| | - James Suliburk
- Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jinsong Liu
- Department of Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Alena Bensussan
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Rachel J DeHoog
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Kyana Y Garza
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Benjamin Ludolph
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Anna G Sorace
- Department of Internal Medicine, Dell Medical School, University of Texas at Austin, Austin, TX 78712, USA
| | - Anum Syed
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX 78712, USA
| | - Aydin Zahedivash
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX 78712, USA
| | - Thomas E Milner
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX 78712, USA
| | - Livia S Eberlin
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, USA.
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13
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Rigo S, Cai C, Gunkel‐Grabole G, Maurizi L, Zhang X, Xu J, Palivan CG. Nanoscience-Based Strategies to Engineer Antimicrobial Surfaces. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1700892. [PMID: 29876216 PMCID: PMC5979626 DOI: 10.1002/advs.201700892] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 01/08/2018] [Indexed: 05/14/2023]
Abstract
Microbial contamination and biofilm formation of medical devices is a major issue associated with medical complications and increased costs. Consequently, there is a growing need for novel strategies and exploitation of nanoscience-based technologies to reduce the interaction of bacteria and microbes with synthetic surfaces. This article focuses on surfaces that are nanostructured, have functional coatings, and generate or release antimicrobial compounds, including "smart surfaces" producing antibiotics on demand. Key requirements for successful antimicrobial surfaces including biocompatibility, mechanical stability, durability, and efficiency are discussed and illustrated with examples of the recent literature. Various nanoscience-based technologies are described along with new concepts, their advantages, and remaining open questions. Although at an early stage of research, nanoscience-based strategies for creating antimicrobial surfaces have the advantage of acting at the molecular level, potentially making them more efficient under specific conditions. Moreover, the interface can be fine tuned and specific interactions that depend on the location of the device can be addressed. Finally, remaining important challenges are identified: improvement of the efficacy for long-term use, extension of the application range to a large spectrum of bacteria, standardized evaluation assays, and combination of passive and active approaches in a single surface to produce multifunctional surfaces.
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Affiliation(s)
- Serena Rigo
- Chemistry DepartmentUniversity of BaselMattenstrasse 24a4058BaselSwitzerland
| | - Chao Cai
- Beijing National Laboratory for Molecular SciencesLaboratory of Polymer Physics and ChemistryInstitute of ChemistryChinese Academy of SciencesZhongguangcun North First Street 2100190BeijingP. R. China
| | | | - Lionel Maurizi
- Chemistry DepartmentUniversity of BaselMattenstrasse 24a4058BaselSwitzerland
| | - Xiaoyan Zhang
- Chemistry DepartmentUniversity of BaselMattenstrasse 24a4058BaselSwitzerland
| | - Jian Xu
- Beijing National Laboratory for Molecular SciencesLaboratory of Polymer Physics and ChemistryInstitute of ChemistryChinese Academy of SciencesZhongguangcun North First Street 2100190BeijingP. R. China
| | - Cornelia G. Palivan
- Chemistry DepartmentUniversity of BaselMattenstrasse 24a4058BaselSwitzerland
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Yu N, Zhang S, Tang B, Ma W, Qiu J. Synthesis of Novel Reactive Disperse Silicon-Containing Dyes and Their Coloring Properties on Silicone Rubbers. MOLECULES (BASEL, SWITZERLAND) 2018; 23:molecules23010127. [PMID: 29315241 PMCID: PMC6017472 DOI: 10.3390/molecules23010127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 01/05/2018] [Accepted: 01/06/2018] [Indexed: 11/24/2022]
Abstract
Novel red and purple reactive disperse silicon-containing dyes were designed and synthesized using p-nitroaniline and 6-bromo-2,4-dinitro-aniline as diazonium components, the first condensation product of cyanuric chloride and 3-(N,N-diethyl)amino-aniline as coupling component, and 3-aminopropylmethoxydimethylsilane, 3-aminopropylmethyldimethoxysilane, and 3-aminopropyltrimethoxysilane as silicone reactive agents. These dyes were characterized by UV-Vis, 1H-NMR, FT-IR, and MS. The obtained reactive disperse silicon-containing dyes were used to color silicone rubbers and the color fastness of the dyes were evaluated. The dry/wet rubbing and washing fastnesses of these dyes all reached 4–5 grade and the sublimation fastness was also above 4 grade, indicating outstanding performance in terms of color fastness. Such colored silicone rubbers showed bright and rich colors without affecting its static mechanical properties.
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Affiliation(s)
- Ning Yu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
- Department of Production & Operation, China National Chemical Corporation, Beijing 100080, China.
| | - Shufen Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
| | - Bingtao Tang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
| | - Wei Ma
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
| | - Jinjing Qiu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
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15
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Deriabin KV, Yaremenko IA, Chislov MV, Fleury F, Terent'ev AO, Islamova RM. Similar nature leads to improved properties: cyclic organosilicon triperoxides as promising curing agents for liquid polysiloxanes. NEW J CHEM 2018. [DOI: 10.1039/c8nj02499e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclic organosilicon triperoxides were found to be vinyl-selective free-radical initiators for thermal curing at 100–180 °C of vinyl-terminated polydimethylsiloxane and trimethylsilyl-terminated polymethylhydrosiloxane producing homogeneous transparent silicone rubbers with antibacterial properties.
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Affiliation(s)
| | - Ivan A. Yaremenko
- N. D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
| | | | - Fabrice Fleury
- Mechanism and regulation of DNA repair team
- UFIP CNRS UMR 6286
- Université de Nantes
- 44322 Nantes
- France
| | | | - Regina M. Islamova
- Saint Petersburg State University
- Saint Petersburg
- Russia
- Institute of Macromolecular Compounds
- Russian Academy of Sciences
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16
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Zhou C, Wu Y, Thappeta KRV, Subramanian JTL, Pranantyo D, Kang ET, Duan H, Kline K, Chan-Park MB. In Vivo Anti-Biofilm and Anti-Bacterial Non-Leachable Coating Thermally Polymerized on Cylindrical Catheter. ACS APPLIED MATERIALS & INTERFACES 2017; 9:36269-36280. [PMID: 28945343 DOI: 10.1021/acsami.7b07053] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Catheters are indispensable tools of modern medicine, but catheter-associated infection is a significant clinical problem, even when stringent sterile protocols are observed. When the bacteria colonize catheter surfaces, they tend to form biofilms making them hard to treat with conventional antibiotics. Hence, there is a great need for inherently antifouling and antibacterial catheters that prevent bacterial colonization. This paper reports the preparation of nonleachable antibiofilm and antibacterial cationic film coatings directly polymerized from actual tubular silicone catheter surfaces via the technique of supplemental activator and reducing agent surface-initiated atom-transfer radical polymerization (SARA SI-ATRP). Three cross-linked cationic coatings containing (3-acrylamidopropyl) trimethylammonium chloride (AMPTMA) or quaternized polyethylenimine methacrylate (Q-PEI-MA) together with a cross-linker (polyethylene glycol dimethacrylate, PEGDMA) were tested. The in vivo antibacterial and antibiofilm effect of these nonleachable covalently linked coatings (using a mouse catheter model) can be tuned to achieve 1.95 log (98.88%) reduction and 1.26 log (94.51%) reduction of clinically relevant pathogenic bacteria (specifically with methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus faecalis (VRE)). Our good in vivo bactericidal killing results using the murine catheter-associated urinary tract infection (CAUTI) model show that SARA SI-ATRP grafting-from technique is a viable technique for making nonleachable antibiofilm coating even on "small" (0.30/0.64 mm inner/outer diameter) catheter.
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Affiliation(s)
- Chao Zhou
- School of Chemical and Biomedical Engineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
| | - Yang Wu
- School of Chemical and Biomedical Engineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
| | - Kishore Reddy Venkata Thappeta
- Singapore Centre for Environmental Life Science Engineering (SCELSE), School of Biological Sciences, Nanyang Technological University , 60 Nanyang Drive, Singapore 637551
| | - Jo Thy Lachumy Subramanian
- School of Chemical and Biomedical Engineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
| | - Dicky Pranantyo
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, Singapore 117585
| | - En-Tang Kang
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, Singapore 117585
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
| | - Kimberly Kline
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
- Singapore Centre for Environmental Life Science Engineering (SCELSE), School of Biological Sciences, Nanyang Technological University , 60 Nanyang Drive, Singapore 637551
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
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Abstract
Recent advances in nanotechnology provide unparalleled flexibility to control the composition, size, shape, surface chemistry, and functionality of materials. Currently available engineering approaches allow precise synthesis of nanocompounds (e.g., nanoparticles, nanostructures, nanocrystals) with both top-down and bottom-up design principles at the submicron level. In this context, these "nanoelements" (NEs) or "nanosized building blocks" can 1) generate new nanocomposites with antibiofilm properties or 2) be used to coat existing surfaces (e.g., teeth) and exogenously introduced surfaces (e.g., restorative or implant materials) for prevention of bacterial adhesion and biofilm formation. Furthermore, functionalized NEs 3) can be conceived as nanoparticles to carry and selectively release antimicrobial agents after attachment or within oral biofilms, resulting in their disruption. The latter mechanism includes "smart release" of agents when triggered by pathogenic microenvironments (e.g., acidic pH or low oxygen levels) for localized and controlled drug delivery to simultaneously kill bacteria and dismantle the biofilm matrix. Here we discuss inorganic, metallic, polymeric, and carbon-based NEs for their outstanding chemical flexibility, stability, and antibiofilm properties manifested when converted into bioactive materials, assembled on-site or delivered at biofilm-surface interfaces. Details are provided on the emerging concept of the rational design of NEs and recent technological breakthroughs for the development of a new generation of nanocoatings or functional nanoparticles for biofilm control in the oral cavity.
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Affiliation(s)
- A.J. Paula
- Solid-Biological Interface Group (SolBIN), Departamento de Física, Universidade Federal do Ceará, Fortaleza, Brazil
| | - H. Koo
- Divisions of Pediatric Dentistry and Community Oral Health, Department of Orthodontics, University of Pennsylvania, Philadelphia, PA, USA
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18
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Wang Y, Yin Z, Xie Z, Zhao X, Zhou C, Zhou S, Chen P. Polysiloxane Functionalized Carbon Dots and Their Cross-Linked Flexible Silicone Rubbers for Color Conversion and Encapsulation of White LEDs. ACS APPLIED MATERIALS & INTERFACES 2016; 8:9961-8. [PMID: 27035213 DOI: 10.1021/acsami.6b01511] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In this work, aminopropylmethylpolysiloxane (AMS) functionalized luminescent carbon dots (AMS-CDs) were prepared via a one-step solvothermal method. AMS-CDs could be self- or co-cross-linking with AMS to form 3D flexible transparent silicone rubbers (SRs) where CDs acted as cross-linking points, so the loading fraction of AMS-CDs could be adjusted from 10 to 100 wt %, thus modulating fluorescence properties and flexibility of silicone rubbers. Because of the self-curing property and high thermal stability, AMS-CDs were also studied in white LEDs (WLEDs), serving as a color conversion and encapsulation layer of GaN based blue LEDs simultaneously that would avoid the traditional problem of poor compatibility between emitting and packaging materials. And the color coordinate of AMS-CDs based WLEDs (0.33, 0.28) was very close to the pure white light. In addition, the obtained CDs cross-linked SRs had good transparency (T > 80%) at 510-1400 nm and high refractive indexes (1.33-1.54) that could meet the need of commercial packaging materials and optical application. AMS-CDs were also promising to be used in the UV LEDs based WLEDs according to their wide wavelength emission and flexible optoelectronic device.
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Affiliation(s)
- Yunfeng Wang
- School of Materials Science and Engineering, Shandong University , Jinan 250061, China
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Zhengmao Yin
- College of Materials Science and Engineering, Qingdao University of Science and Technology , Qingdao 266042, China
| | - Zheng Xie
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Xinxin Zhao
- School of Materials Science and Engineering, Shandong University , Jinan 250061, China
| | - Chuanjian Zhou
- School of Materials Science and Engineering, Shandong University , Jinan 250061, China
- Key Laboratory of Special Functional Aggregated Materials, Ministry of Education , Jinan 250061, China
| | - Shuyun Zhou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Ping Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190, China
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19
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Abstract
Silicones have been used in medicines, cosmetics and medical devices for over 60 years. Polydimethylsiloxanes are polymers that are typically used either as an active in oral drug products or as excipients in topical and transdermal drug products. Inherent characteristics like hydrophobicity, adhesion and aesthetics allow silicones to offer function and performance to drug products. Recent technologies like swollen crosslinked silicone elastomer blend networks, sugar siloxanes, amphiphilic resin linear polymers and silicone hybrid pressure sensitive adhesives promise potential performance advantages and improved drug delivery efficacy. This article presents a review of recent silicone material developments focusing on their function as excipients influencing drug delivery in topical and transdermal systems.
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20
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Jin Y, Pu Q, Fan H. Synthesis of linear piperazine/polyether functional polysiloxane and its modification of surface properties on cotton fabrics. ACS APPLIED MATERIALS & INTERFACES 2015; 7:7552-7558. [PMID: 25812599 DOI: 10.1021/am5088743] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this work, silicone softener (PTSO-PEG) was synthesized, with piperazine terminated polydimethylsiloxane (PTSO) and epoxy terminated polyethylene glycol (EPEG) as raw materials. Chemical structure of PTSO-PEG was characterized by (1)H NMR, FTIR, GPC, and TGA. Its application on cotton fabrics was studied. Morphologies of silicone modified surfaces on cotton fabrics and silicon wafers were investigated by SEM and AFM, respectively. The morphology images indicated that PTSO-PEG treated surface was macroscopically smooth and microscopically rough. Performance properties of silicone treated cotton fabrics, including hydrophilicity, whiteness, and softness, were tested. The results showed that PTSO-PEG treated cotton fabrics expressed better whiteness and hydrophilicity than traditional amino silicone treated sample. The piperazine and hydrophilic polyether groups on PTSO-PEG molecules disturbed the continuous and orderly arrangement of Si-CH3 groups, giving the cotton a hydrophilic and rough surface. This work provided a cost-effective and environmental method to synthesize and apply high performance silicone softener.
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Affiliation(s)
- Yufen Jin
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Qun Pu
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Hong Fan
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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