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Zhu Q, Zhang Q, Fu DY, Su G. Polysaccharides in contact lenses: From additives to bulk materials. Carbohydr Polym 2023; 316:121003. [PMID: 37321708 DOI: 10.1016/j.carbpol.2023.121003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/26/2023] [Accepted: 05/07/2023] [Indexed: 06/17/2023]
Abstract
As the number of applications has increased, so has the demand for contact lenses comfort. Adding polysaccharides to lenses is a popular way to enhance comfort for wearers. However, this may also compromise some lens properties. It is still unclear how to balance the variation of individual lens parameters in the design of contact lenses containing polysaccharides. This review provides a comprehensive overview of how polysaccharide addition impacts lens wear parameters, such as water content, oxygen permeability, surface wettability, protein deposition, and light transmittance. It also examines how various factors, such as polysaccharide type, molecular weight, amount, and mode of incorporation into lenses modulate these effects. Polysaccharide addition can improve some wear parameters while reducing others depending on the specific conditions. The optimal method, type, and amount of added polysaccharides depend on the trade-off between various lens parameters and wear requirements. Simultaneously, polysaccharide-based contact lenses may be a promising option for biodegradable contact lenses as concerns regarding environmental risks associated with contact lens degradation continue to increase. It is hoped that this review will shed light on the rational use of polysaccharides in contact lenses to make personalized lenses more accessible.
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Affiliation(s)
- Qiang Zhu
- School of Pharmacy, Nantong University, Nantong 226001, China
| | - Qiao Zhang
- Department of Clinical Pharmacy, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Ding-Yi Fu
- School of Pharmacy, Nantong University, Nantong 226001, China
| | - Gaoxing Su
- School of Pharmacy, Nantong University, Nantong 226001, China.
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2
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Alcântara LO, de Sousa JR, Andrade FK, Teixeira EH, Cerqueira MÂ, da Silva ALC, Souza Filho MDSM, de Souza BWS. Extraction and characterization of hyaluronic acid from the eyeball of Nile Tilapia (Oreochromis niloticus). Int J Biol Macromol 2023; 226:172-183. [PMID: 36495987 DOI: 10.1016/j.ijbiomac.2022.12.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 09/04/2022] [Accepted: 12/03/2022] [Indexed: 12/13/2022]
Abstract
Hyaluronic acid (HA) is a biopolymer of enormous value aggregation for in general industry. The vitreous humor of the eyeball from Nile tilapia contains appreciable amounts of hyaluronic acid. In this sense, the aim of this work was to extract and characterize hyaluronic acid from the eyeball of the Nile tilapia for biomedical applications, adding value to fish industry residues. The characterization by infra-red (FTIR), 13C nuclear magnetic resonance (NMR) and high performance liquid chromatography (HPLC) confirmed that hyaluronic acid was obtained. The gel permeation chromatography (GPC) showed that the obtained material presents a low molecular mass (37 KDa). Thermogravimetry (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD) analysis showed that the materials present a thermal stability superior to the commercial hyaluronic acid from Streptococcus equi, with a partially crystalline character. The cytotoxicity assay (MTT method) with fibroblast cells (L929) demonstrated that the extracted biopolymer besides not being cytotoxic, was able to stimulate cell proliferation. Therefore, the hyaluronic acid extracted from this source of residue constitutes a product with biotechnological potential, which has adequate quality for wide biomedical applications.
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Affiliation(s)
- Lyndervan Oliveira Alcântara
- Department of Fishing Engineering, Federal University of Ceara, Campus do Pici, 825, CEP: 60356-000 Fortaleza, CE, Brazil
| | - Juliana Rabelo de Sousa
- Department of Fishing Engineering, Federal University of Ceara, Campus do Pici, 825, CEP: 60356-000 Fortaleza, CE, Brazil
| | - Fábia Karine Andrade
- Department of Chemical Engineering, Graduate Program of Chemical Engineering, Federal University of Ceara, Campus do Pici, 709, CEP: 60455-760 Fortaleza, CE, Brazil
| | - Edson Holanda Teixeira
- Department of Pathology and Forensic Medicine, Faculty of Medicine, Federal University of Ceara, UFC, CEP: 60430-160 Fortaleza, CE, Brazil
| | - Miguel Ângelo Cerqueira
- International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal
| | - André Luis Coelho da Silva
- Department of Biochemistry and Molecular Biology, Federal University of Ceara, Campus do Pici, 907 CEP: 60451-970, Fortaleza, CE, Brazil
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3
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Silica Hydrogels as Platform for Delivery of Hyaluronic Acid. Pharmaceutics 2022; 15:pharmaceutics15010077. [PMID: 36678706 PMCID: PMC9864809 DOI: 10.3390/pharmaceutics15010077] [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: 11/29/2022] [Revised: 12/21/2022] [Accepted: 12/23/2022] [Indexed: 12/28/2022] Open
Abstract
Hyaluronic acid (HA) is chondroprotective and anti-inflammatory drug used clinically for treatment of inflammatory disorders (arthritis, skin diseases, bowel diseases, etc.). In addition, HA is a crucial ingredient in the cosmetic products used to eliminate the unpleasant consequences of inflammatory skin diseases. The main disadvantages that limit its use are its low mechanical properties and its rapid biodegradation. In this paper, silica hydrogels are considered as a promising matrix for HA to improve its properties. The hybrid HA-silica hydrogels were synthesized by the sol-gel method. Morphology of the hydrogels was investigated by optical microscopy and scanning electron microscopy methods. Taking into account their potential applications for topical and injectable delivery, much attention was paid to investigation of deformation properties of the hydrogels under shear, compression, and tension. Their resistance to enzymatic degradation in vitro was estimated. Kinetics and mechanisms of HA release from the hybrid hydrogels in vitro were also studied. It was found that the indicated properties can be controlled by synthesis conditions, HA molecular weight, and its loading in the hydrogels. Silica hydrogels are a prospective platform for the development of new soft formulations and cosmetic compositions of HA with improved pharmacological and consumer properties.
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4
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Zheng Y, Dou J, Wang Y, Zhu L, Yao G, Kim YH, Radke CJ, Wu JY. Sustained Release of a Polymeric Wetting Agent from a Silicone-Hydrogel Contact Lens Material. ACS OMEGA 2022; 7:29223-29230. [PMID: 36033690 PMCID: PMC9404521 DOI: 10.1021/acsomega.2c03310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 07/27/2022] [Indexed: 06/15/2023]
Abstract
Uptake and release kinetics are investigated of a dilute aqueous polymeric-surfactant wetting agent, (ethylene oxide)45-(butylene oxide)10 copolymer, also referred to as poly(oxyethylene)-co-poly(oxybutylene), impregnated into a newly designed silicone-hydrogel lens material. Transient scanning concentration profiles of the fluorescently tagged polymeric surfactant follow Fick's second law with a diffusion coefficient near 10-11 cm2/s, a value 3-4 orders smaller than that of the free surfactant in bulk water. The Nernst partition coefficient of the tagged polymeric wetting agent, determined by fluorescence microscopy and by methanol extraction, is near 350, a very large value. Back-extraction of the polymeric-surfactant wetting agent releases only ∼20% of the loaded amount after soaking the fully loaded lens for over 7 days. The remaining ∼80% is irreversibly bound in the lens matrix. Reverse-phase liquid chromatography of the lens-loaded and lens-extracted surfactant demonstrates that the released wetting agent is more hydrophilic with a higher polarity. Aqueous poly(oxyethylene)-co-poly(oxybutylene) is hypothesized to attach strongly to the lens matrix, most likely to the lens silicone domains. Strong binding leads to slow transient diffusion, to large uptake, and to significant irreversible retention. These characteristics indicate the suitability of using a poly(oxyethylene)-co-poly(oxybutylene) nonionic polymeric surfactant to maintain enhanced lens wettability over time. Methodology and findings from this study provide useful insights for designing sustained-release contact-lens wetting agents and materials.
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Affiliation(s)
- Ying Zheng
- Alcon
Research LLC, 11460 Johns
Creek Parkway, Duluth, Georgia 30097, United States
| | - Jinbo Dou
- Alcon
Research LLC, 11460 Johns
Creek Parkway, Duluth, Georgia 30097, United States
| | - Yan Wang
- Alcon
Research LLC, 11460 Johns
Creek Parkway, Duluth, Georgia 30097, United States
| | - Lu Zhu
- Alcon
Research LLC, 11460 Johns
Creek Parkway, Duluth, Georgia 30097, United States
| | - George Yao
- Alcon
Research LLC, 11460 Johns
Creek Parkway, Duluth, Georgia 30097, United States
- Alcon
Research LLC, 6201 South
Freeway, Fort Worth, Texas 76134, United States
| | - Young Hyun Kim
- Alcon
Research LLC, 11460 Johns
Creek Parkway, Duluth, Georgia 30097, United States
- Chemical
and Biomolecular Engineering Department, University of California, Berkeley, California 94720, United States
- Herbert
Wertheim School of Optometry & Vision Science, University of California, Berkeley, California 94720, United States
| | - Clayton J. Radke
- Chemical
and Biomolecular Engineering Department, University of California, Berkeley, California 94720, United States
- Herbert
Wertheim School of Optometry & Vision Science, University of California, Berkeley, California 94720, United States
| | - James Yuliang Wu
- Alcon
Research LLC, 11460 Johns
Creek Parkway, Duluth, Georgia 30097, United States
- Alcon
Research LLC, 6201 South
Freeway, Fort Worth, Texas 76134, United States
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5
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Rocha Neto JBM, Lima GG, Fiamingo A, Germiniani LGL, Taketa TB, Bataglioli RA, da Silveira GAT, da Silva JVL, Campana-Filho SP, Oliveira ON, Beppu MM. Controlling antimicrobial activity and drug loading capacity of chitosan-based layer-by-layer films. Int J Biol Macromol 2021; 172:154-161. [PMID: 33428951 DOI: 10.1016/j.ijbiomac.2020.12.218] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 12/30/2020] [Indexed: 12/19/2022]
Abstract
We report on layer-by-layer (LbL) films of chitosans (CHI) and hyaluronic acid (HA) whose properties could be controlled by employing chitosans with different degrees of deacetylation (DD¯ ≈ 85%; 65%; 40%) and high average molecular weight (ca. 106 g/mol). In spite of their high molecular weight, these chitosans are soluble within a wide pH range, including physiological pH. HA/CHI LbL films produced from polymer solutions at pH 4.5 were thinner, smoother, more hydrophilic than those prepared at pH 7.2. This is attributed to the more extended conformation adopted by chitosan due to its very high charge density at low pH, favoring a compact chain packing during the film formation and resulting in lower film thickness and roughness. The smoother HA/CHI LbL films obtained at pH 4.5 were effective against Escherichia coli, while the thicker, rougher LbL films fabricated at pH 7.2 could be used in the controlled released of Rose Bengal dye. In summary, the tuning of only two parameters, i.e. solution pH and DD¯ of chitosans, provides access to a library of HA/CHI LbL films for tailored, diversified applications.
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Affiliation(s)
- J B M Rocha Neto
- School of Chemical Engineering, University of Campinas, 13083-852 Campinas, Brazil; Nucleus of Three-Dimensional Technologies (NT3D), Renato Archer Information Technology Center - CTI, 13069-901 Campinas, Brazil.
| | - G G Lima
- School of Chemical Engineering, University of Campinas, 13083-852 Campinas, Brazil
| | - A Fiamingo
- São Carlos Institute of Chemistry, University of São Paulo, 13566-590 São Carlos, Brazil
| | - L G L Germiniani
- School of Chemical Engineering, University of Campinas, 13083-852 Campinas, Brazil
| | - T B Taketa
- School of Chemical Engineering, University of Campinas, 13083-852 Campinas, Brazil
| | - R A Bataglioli
- School of Chemical Engineering, University of Campinas, 13083-852 Campinas, Brazil
| | - G A T da Silveira
- School of Chemical Engineering, University of Campinas, 13083-852 Campinas, Brazil
| | - J V L da Silva
- Nucleus of Three-Dimensional Technologies (NT3D), Renato Archer Information Technology Center - CTI, 13069-901 Campinas, Brazil
| | - S P Campana-Filho
- São Carlos Institute of Chemistry, University of São Paulo, 13566-590 São Carlos, Brazil
| | - O N Oliveira
- São Carlos Institute of Physics, University of São Paulo, 13566-590 São Carlos, Brazil
| | - M M Beppu
- School of Chemical Engineering, University of Campinas, 13083-852 Campinas, Brazil.
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6
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Tavazzi S, Origgi R, Anselmi M, Corvino A, Colciago S, Fagnola M, Bracco S, Zeri F. Effects of Aqueous-Supplementing Artificial Tears in Wearers of Biweekly Replacement Contact Lenses vs Wearers of Daily Disposable Contact Lenses. CLINICAL OPTOMETRY 2020; 12:75-84. [PMID: 32612403 PMCID: PMC7323791 DOI: 10.2147/opto.s249078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 05/07/2020] [Indexed: 06/11/2023]
Abstract
PURPOSE To compare the effects of artificial tears (ATs) in wearers of biweekly replacement silicone hydrogel contact lenses (BW-Ws) and wearers of daily disposable contact lenses (DD-Ws) of the same material. MATERIALS AND METHODS The aqueous-supplementing ATs, OPTOyalA and OPTOidro, were assigned to be used for 2 weeks to healthy and young subjects: 1) 20 (8 and 12, respectively) BW-Ws wearing silicone hydrogel somofilcon A CLs (Clariti Elite), 2) 18 (9 and 9, respectively) DD-Ws wearing silicone hydrogel somofilcon A CLs (Clarity 1 Day), and 3) a control group of 33 (16 and 17, respectively) N-Ws. Ocular symptoms and comfort, tear volume and stability, and ocular surface condition were assessed by Ocular Surface Disease Index (OSDI), 5-Item Dry Eye Questionnaire (DEQ5), tear meniscus height (TMH), non-invasive tear break-up time (NIBUT), and evaluation of ocular redness (OR). The assessment was performed before and after 15 days of use of the ATs in the 3 groups (BW-Ws, DD-Ws, and N-Ws). RESULTS No clear significant difference was noted in symptoms and signs between OPTOyalA and OPTOidro irrespectively of the group of people studied. ATs use for 15 days produced a significant improvement in DEQ5 and OR in DD-Ws (Δ=-34%, p=0.006; Δ=-23%, p<0.001) and in N-Ws (Δ=-21%, p=0.001; Δ=-10%, p=0.006) but not in BW-Ws (Δ=-5%, p=0.072; Δ=-2%, p=0.257). No significant change was noted for TMH. CONCLUSION In young and healthy subjects, the aqueous-supplementing effect of the ATs under consideration is more a rinsing and tear replacem ent effect than an increase in tear volume, and it produces an improvement of the eye redness and ocular symptoms. Contact lens wear influenced the effectiveness of ATs in a way which is correlated with the CL replacement schedule.
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Affiliation(s)
- Silvia Tavazzi
- Department of Materials Science, University of Milano-Bicocca, Milan, Italy
- Research Centre in Optics and Optometry (COMiB), University of Milano-Bicocca, Milan, Italy
| | - Riccardo Origgi
- Department of Materials Science, University of Milano-Bicocca, Milan, Italy
| | - Martina Anselmi
- Department of Materials Science, University of Milano-Bicocca, Milan, Italy
| | - Andrea Corvino
- Department of Materials Science, University of Milano-Bicocca, Milan, Italy
| | - Sara Colciago
- Department of Materials Science, University of Milano-Bicocca, Milan, Italy
| | - Matteo Fagnola
- Research Centre in Optics and Optometry (COMiB), University of Milano-Bicocca, Milan, Italy
| | - Silvia Bracco
- Department of Materials Science, University of Milano-Bicocca, Milan, Italy
| | - Fabrizio Zeri
- Department of Materials Science, University of Milano-Bicocca, Milan, Italy
- Research Centre in Optics and Optometry (COMiB), University of Milano-Bicocca, Milan, Italy
- Ophthalmic Research Group, School of Life and Health Sciences, Aston University, Birmingham, UK
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7
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Bayer IS. Hyaluronic Acid and Controlled Release: A Review. Molecules 2020; 25:molecules25112649. [PMID: 32517278 PMCID: PMC7321085 DOI: 10.3390/molecules25112649] [Citation(s) in RCA: 152] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/02/2020] [Accepted: 06/03/2020] [Indexed: 12/11/2022] Open
Abstract
Hyaluronic acid (HA) also known as hyaluronan, is a natural polysaccharide—an anionic, non-sulfated glycosaminoglycan—commonly found in our bodies. It occurs in the highest concentrations in the eyes and joints. Today HA is used during certain eye surgeries and in the treatment of dry eye disease. It is a remarkable natural lubricant that can be injected into the knee for patients with knee osteoarthritis. HA has also excellent gelling properties due to its capability to bind water very quickly. As such, it is one the most attractive controlled drug release matrices and as such, it is frequently used in various biomedical applications. Due to its reactivity, HA can be cross-linked or conjugated with assorted bio-macromolecules and it can effectively encapsulate several different types of drugs, even at nanoscale. Moreover, the physiological significance of the interactions between HA and its main membrane receptor, CD44 (a cell-surface glycoprotein that modulates cell–cell interactions, cell adhesion and migration), in pathological processes, e.g., cancer, is well recognized and this has resulted in an extensive amount of studies on cancer drug delivery and tumor targeting. HA acts as a therapeutic but also as a tunable matrix for drug release. Thus, this review focuses on controlled or sustained drug release systems assembled from HA and its derivatives. More specifically, recent advances in controlled release of proteins, antiseptics, antibiotics and cancer targeting drugs from HA and its derivatives were reviewed. It was shown that controlled release from HA has many benefits such as optimum drug concentration maintenance, enhanced therapeutic effects, improved efficiency of treatment with less drug, very low or insignificant toxicity and prolonged in vivo release rates.
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Affiliation(s)
- Ilker S Bayer
- Smart Materials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genoa, Italy
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8
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Rocha Neto JBM, Gomes Neto RJ, Bataglioli RA, Taketa TB, Pimentel SB, Baratti MO, Costa CAR, Carvalho HF, Beppu MM. Engineering the surface of prostate tumor cells and hyaluronan/chitosan multilayer films to modulate cell-substrate adhesion properties. Int J Biol Macromol 2020; 158:197-207. [PMID: 32360468 DOI: 10.1016/j.ijbiomac.2020.04.136] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 03/05/2020] [Accepted: 04/18/2020] [Indexed: 12/24/2022]
Abstract
This paper explores different film assembly conditions of the polyelectrolyte solutions of hyaluronan (HA) and chitosan (CHI), as well as both substrate and cell surface modifications, to investigate PC3 cells adhesion properties. UV-Visible, AFM-IR and Zeta potential techniques indicate that the solution ionic strength is a relevant parameter to modulate the free carboxylic groups of HA on the film surface. In addition, capacitive coupling measurements suggest that assembly conditions that favor surface charge mobility inhibit cell adhesion due to polymer rearrangements that support non-specific electrostatic interactions of positively charged CHI residues and the negatively charged cell moieties, rather than specific CD44-hyaluronan interactions. Moreover, the PC3 cells treatment with hyaluronidase and anti-CD44 antibody also highlighted the importance of CD44 binding site availability on the tumor cell adhesion properties. Finally, the conjugation of wheat germ agglutinin on the film surface proved to be a suitable strategy to boost the PC3 cell adhesion properties. Our results reveal the remarkable capacity of HA/CHI films to modulate cell-substrate properties, which pave the road for the development of surfaces suitable for several applications based on biosensing.
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Affiliation(s)
- J B M Rocha Neto
- School of Chemical Engineering, Department of Materials and Bioprocess Engineering, University of Campinas, Campinas 13083-852, São Paulo, Brazil.
| | - R J Gomes Neto
- School of Chemical Engineering, Department of Materials and Bioprocess Engineering, University of Campinas, Campinas 13083-852, São Paulo, Brazil
| | - R A Bataglioli
- School of Chemical Engineering, Department of Materials and Bioprocess Engineering, University of Campinas, Campinas 13083-852, São Paulo, Brazil
| | - T B Taketa
- School of Chemical Engineering, Department of Materials and Bioprocess Engineering, University of Campinas, Campinas 13083-852, São Paulo, Brazil
| | - S B Pimentel
- Institute of Biology, Department of Cell Biology, University of Campinas, Campinas 13083-970, São Paulo, Brazil
| | - M O Baratti
- Institute of Biology, Department of Cell Biology, University of Campinas, Campinas 13083-970, São Paulo, Brazil
| | - C A R Costa
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, São Paulo, Brazil
| | - H F Carvalho
- Institute of Biology, Department of Cell Biology, University of Campinas, Campinas 13083-970, São Paulo, Brazil
| | - M M Beppu
- School of Chemical Engineering, Department of Materials and Bioprocess Engineering, University of Campinas, Campinas 13083-852, São Paulo, Brazil.
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9
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Multiple drug delivery from the drug-implants-laden silicone contact lens: Addressing the issue of burst drug release. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 112:110885. [PMID: 32409042 DOI: 10.1016/j.msec.2020.110885] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 03/20/2020] [Indexed: 01/17/2023]
Abstract
A fixed combination of bimatoprost/timolol eye drop solution is used to manage the elevated intra-ocular pressure in glaucoma patients, including individuals whose condition is poorly controlled by monotherapy. Eye drop solutions are generally given in high dose, due to poor ocular bioavailability. The high ocular dose of bimatoprost and timolol lead to hyperaemia and systemic cardiac side effects respectively. Here, we introduce multiple implant-laden contact lenses (IM) to passively deliver timolol, bimatoprost and hyaluronic acid at therapeutically relevant doses without high burst release. The drug-loaded implants were individually implanted in the outer periphery of the silicone contact lenses. Atomic force microscopy showed the smooth surface of the implant contact lens, as the implants were inside the contact lens matrix. The implant lens (IM) showed major loss of drugs [timolol = 60.60%, bimatoprost = 61.75% and HA = 46.03%] during the monomer extraction and wet sterilization, while the option of dry radiation sterilization (IM-R lens) and hydration for 24 h prior to use showed relatively lower loss of drugs [timolol = 16.87%, bimatoprost = 47.95% and HA = 24.41%]. The in-vitro drugs release data of IM-R lens, showed sustained release for 72 h, with low burst release in comparison to the soaked (SM) and direct drug-laden contact lenses (DL). The in vivo drug release data in the rabbit tear fluid showed sustained release using IM-R lens in comparison to the SM lens and eye drop therapy. The burst release with the IM-R lens was many folds reduced, which could bypass the side effects associated with multiple eye drop therapy. The in vivo pharmacodynamic study in the rabbit model showed peak and valley profile with multiple eye drop therapy, while IM-R lens showed prolong reduction in intra ocular pressure (IOP) for 120 h. The study demonstrates the application of implantation technology to deliver multiple drug through contact lenses to treat glaucoma.
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10
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Effect of hyaluronic acid on the State and photoactivity of Zn(II) phthalocyanine cationic derivative in mixed aqueous solutions. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111927] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Contact lenses with dual drug delivery for the treatment of bacterial conjunctivitis. Int J Pharm 2018; 548:139-150. [PMID: 29960036 DOI: 10.1016/j.ijpharm.2018.06.059] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 06/26/2018] [Accepted: 06/26/2018] [Indexed: 12/21/2022]
Abstract
Currently, bacterial conjunctivitis is treated by frequent administration of antibiotic eye drop solutions, which is tedious and patient noncompliant. Contact lenses could be ideal medical devices to sustain the release of ophthalmic drugs, but the incorporation of the latter can alter the optical and physical properties of the lenses. In addition, many contact lens users have reported the pink eye syndrome, making them unsuitable as ocular medical devices. In the present study, we have designed a novel type of lenses containing semi-circular rings loaded with moxifloxacin HCl (a broad spectrum antibiotic) and hyaluronic acid (a comfort agent), respectively, in order to treat bacterial conjunctivitis without altering the critical lens properties. The drug loaded rings were implanted separately within the periphery of the contact lenses using the modified cast moulding technology. The atomic force microscopy report showed an average roughness of 22.27 nm for the implant lens, which was significantly lower in comparison to the marketed Freshlook® (116.27 nm) contact lens. The major amount of moxifloxacin HCl was leached (68.16-74.55%) during the monomer extraction and wet sterilization (autoclave) steps; hence the lenses were terminally sterilized by radiation and packaged under dry condition (dehydrated). The in vitro release data showed release for moxifloxacin HCl and hyaluronic acid up to 96 h. The in vivo drug release studies showed significant improvement [>MIC for Staphylococcus aureus] in the drug residence time in comparison to the eye drop therapy. The in vivo efficacy study in the staphylococcus aureus induced conjunctivitis showed equivalent healing effect with the single implant contact lens in comparison to the frequent high dose eye drop therapy. The study demonstrated the successful application of the implantation technology to co-deliver moxifloxacin HCl and hyaluronic acid from the contact lenses for the extended period of time to treat conjunctivitis.
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12
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Zhang X, He F, Xiang K, Zhang J, Xu M, Long P, Su H, Gan Z, Yu Q. CD44-Targeted Facile Enzymatic Activatable Chitosan Nanoparticles for Efficient Antitumor Therapy and Reversal of Multidrug Resistance. Biomacromolecules 2018; 19:883-895. [PMID: 29401378 DOI: 10.1021/acs.biomac.7b01676] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Nanoparticles are attractive platforms for the delivery of various anticancer therapeutics. Nevertheless, their applications are still limited by the relatively low drug loading capacity and the occurrence of multidrug resistance (MDR) against chemotherapeutics. In this study, we report that the integration of d-α-tocopherol succinate (VES) residue with both chitosan and paclitaxel (PTX) led to significant improvement of drug loading capacity and drug loading efficiency through the enhancement of drug/carrier interaction. After the incorporation of hyaluronic acid containing PEG side chains (HA-PEG), higher serum stability and more efficient cellular uptake were obtained. Due to HA coating, VES residues and the enzymatic responsive drug release property, such facile nanoparticles actively targeted cancer cells that overexpress CD44 receptor and efficiently reversed the MDR of treated cells, but caused no significant toxicity to mouse fibroblast (NIH-3T3). More importantly, with HA-PEG coating, longer blood circulation and more effective tumor accumulation were achieved for prodrug nanoparticles. Finally, superior anticancer activity and excellent safety profile was demonstrated by HA-PEG coated enzymatically activatable prodrug nanoparticles compared to commercially available Taxol formulation.
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Affiliation(s)
| | | | | | - Jiajing Zhang
- Beijing Hospital and Beijing Institute of Geriatrics , Ministry of Health , Beijing 100730 , People's Republic of China
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13
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Desai AR, Maulvi FA, Pandya MM, Ranch KM, Vyas BA, Shah SA, Shah DO. Co-delivery of timolol and hyaluronic acid from semi-circular ring-implanted contact lenses for the treatment of glaucoma: in vitro and in vivo evaluation. Biomater Sci 2018; 6:1580-1591. [DOI: 10.1039/c8bm00212f] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Controlled drug release from semi-circular drug-loaded ring-implanted contact lenses.
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Affiliation(s)
- Ankita R. Desai
- Maliba Pharmacy College
- Uka Tarsadia University
- Surat 394350
- India
| | | | - Mihir M. Pandya
- Maliba Pharmacy College
- Uka Tarsadia University
- Surat 394350
- India
| | - Ketan M. Ranch
- Maliba Pharmacy College
- Uka Tarsadia University
- Surat 394350
- India
| | - Bhavin A. Vyas
- Maliba Pharmacy College
- Uka Tarsadia University
- Surat 394350
- India
| | | | - Dinesh O. Shah
- Shah-Schulman Center for Surface Science and Nanotechnology
- Dharmsinh Desai University
- Nadiad 387001
- India
- Department of Chemical Engineering
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Scheuer CA, Rah MJ, Reindel WT. Increased concentration of hyaluronan in tears after soaking contact lenses in Biotrue multipurpose solution. Clin Ophthalmol 2016; 10:1945-1952. [PMID: 27784983 PMCID: PMC5063495 DOI: 10.2147/opth.s115705] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Purpose This study was conducted to determine 1) the concentration of hyaluronan (HA) in the tear films of contact lens (CL) wearers versus non-CL wearers and 2) whether HA sorbed from Biotrue, an HA-containing multipurpose solution (MPS), onto senofilcon A lenses affects the concentration of HA in tears after 2 hours of wear. Patients and methods Tears of habitual CL wearers and non-CL wearers were collected on Schirmer strips at baseline and after 2 hours of wear of senofilcon A CLs that had first been either rinsed with Sensitive Eyes Saline or soaked in Biotrue MPS for 14 hours. HA concentrations were measured by enzyme-linked immunosorbent assay (ELISA) and adjusted for sample volumes. Results No difference in baseline concentrations of HA in tears was found between CL wearers and non-CL wearers (P=0.07), nor between males and females (P=0.06). However, age was significantly negatively associated with HA concentration (P<0.01), and mostly, CL wear contributed to a significant association (P<0.01). Among saline-rinsed CL wearers, no change in HA concentration in tears was observed after 2 hours of wear (P=0.38). By contrast, a significant increase in HA concentration was observed in the tears from eyes that had worn CLs soaked in Biotrue MPS when compared to baseline (P=0.01) or to saline-rinsed control (P=0.03). Conclusion 1) In this study population, no difference in baseline concentration of HA was observed between CL wearers and non-CL wearers, and 2) after 2 hours of wear of senofilcon A lenses that were soaked in Biotrue MPS, HA concentrations in the tear films of CL wearers increased.
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Affiliation(s)
| | - Marjorie J Rah
- Vision Care, Bausch & Lomb Incorporated, Rochester, NY, USA
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15
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Wygladacz KA, Hook DJ. Visualization of a hyaluronan network on the surface of silicone-hydrogel materials. Clin Ophthalmol 2016; 10:1423-33. [PMID: 27555749 PMCID: PMC4968858 DOI: 10.2147/opth.s105902] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Biotrue multipurpose solution (MPS) is a bioinspired disinfecting and conditioning solution that includes hyaluronic acid (HA) as a natural wetting agent. Previous studies demonstrated that HA sorbed from Biotrue MPS on both conventional and silicone hydrogel (SiHy) contact lens materials; an in vitro simulated-wear test validated the presence of HA on the lens surfaces for as long as 20 hours. In this study, the morphology and distribution of HA sorbed from both Biotrue and pure HA solution on SiHy contact lens surfaces was examined. Atomic force microscopy imaging was used to illustrate the topography of fresh SiHy contact lens materials before and after incubation with 0.1% (w/v) HA solution. The distribution, as well as fine details of the HA network, were resolved by first staining HA with Gram's safranin, then imaging with confocal laser-scanning microscopy and differential interference-contrast microscopy. In this approach, SiHy materials take up the dye (safranin) nonspecifically, such that the resultant safranin-HA complex appears dim against the fluorescent lens background. Balafilcon A was chosen as the representative of glassy SiHy lenses that require postpolymerization plasma treatment to increase wettability. Senofilcon A and samfilcon A were chosen as representatives of SiHy materials fabricated with an internal wetting agent. A confluent and dim HA-safranin network was observed adhered to balafilcon A, senofilcon A, and samfilcon A lens surfaces incubated with either 0.1% (w/v) HA solution or Biotrue MPS. Therefore, the conditioning function provided by Biotrue MPS may be in part explained by the presence of the HA humectant layer that readily sorbs on the various types of SiHy contact lens materials.
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Affiliation(s)
| | - Daniel J Hook
- Vision Care, Bausch & Lomb Incorporated, Rochester, NY, USA
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16
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Platelet lysate and chondroitin sulfate loaded contact lenses to heal corneal lesions. Int J Pharm 2016; 509:188-196. [PMID: 27234702 DOI: 10.1016/j.ijpharm.2016.05.045] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 05/19/2016] [Accepted: 05/23/2016] [Indexed: 11/20/2022]
Abstract
Hemoderivative tear substitutes contain various ephiteliotrophic factors, such as growth factors (GF), involved in ocular surface homeostasis without immunogenic properties. The aim of the present work was the loading of platelet lysate into contact lenses to improve the precorneal permanence of platelet lysate growth factors on the ocular surface to enhance the treatment of corneal lesions. To this purpose, chondroitin sulfate, a sulfated glycosaminoglycan, which is normally present in the extracellular matrix, was associated with platelet lysate. In fact, chondroitin sulfate is capable of electrostatic interaction with positively charged growth factors, in particular, with bFGF, IGF, VEGF, PDGF and TGF-β, resulting in their stabilization and reduced degradation in solution. In the present work, various types of commercially available contact lenses have been loaded with chondroitin sulfate or chondroitin sulfate in association with platelet lysate to achieve a release of growth factors directly onto the corneal surface lesions. One type of contact lenses (PureVision(®)) showed in vitro good proliferation properties towards corneal cells and were able to enhance cut closure in cornea constructs.
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17
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Kasetvatin C, Rujivipat S, Tiyaboonchai W. Combination of elastic liposomes and low frequency ultrasound for skin permeation enhancement of hyaluronic acid. Colloids Surf B Biointerfaces 2015; 135:458-464. [DOI: 10.1016/j.colsurfb.2015.07.078] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 07/05/2015] [Accepted: 07/28/2015] [Indexed: 11/25/2022]
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18
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Maulvi FA, Soni TG, Shah DO. Extended release of hyaluronic acid from hydrogel contact lenses for dry eye syndrome. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2015; 26:1035-50. [DOI: 10.1080/09205063.2015.1072902] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Tavazzi S, Ferraro L, Fagnola M, Cozza F, Farris S, Bonetti S, Simonutti R, Borghesi A. Mechanically triggered solute uptake in soft contact lenses. Colloids Surf B Biointerfaces 2015; 130:16-22. [DOI: 10.1016/j.colsurfb.2015.03.057] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 03/26/2015] [Accepted: 03/27/2015] [Indexed: 11/25/2022]
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20
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21
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Korogiannaki M, Guidi G, Jones L, Sheardown H. Timolol maleate release from hyaluronic acid-containing model silicone hydrogel contact lens materials. J Biomater Appl 2015; 30:361-76. [PMID: 25887216 DOI: 10.1177/0885328215581507] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This study was designed to assess the impact of a releasable wetting agent, such as hyaluronic acid (HA), on the release profile of timolol maleate (TM) from model silicone hydrogel contact lens materials. Polyvinylpyrrolidone (PVP) was used as an alternative wetting agent for comparison. The model lenses consisted of a hydrophilic monomer, either 2-hydroxyethyl methacrylate or N,N-dimethylacrylamide and a hydrophobic silicone monomer of methacryloxypropyltris (trimethylsiloxy) silane. The loading of the wetting and the therapeutic agent occurred during the synthesis of the silicone hydrogels through the method of direct entrapment. The developed materials were characterized by minimal changes in the water uptake, while lower molecular weight of HA improved their surface wettability. The transparency of the examined silicone hydrogels was found to be affected by the miscibility of the wetting agent in the prepolymer mixture as well as the composition of the developed silicone hydrogels. Sustained release of TM from 4 to 14 days was observed, with the drug transport occurring presumably through the hydrophilic domains of the silicone hydrogels. The release profile was strongly dependent on the hydrophilic monomer composition, the distribution of hydrophobic (silane) domains, and the affinity of the therapeutic agent for the silicone hydrogel matrix. Noncovalent entrapment of the wetting agent did not change the in vitro release duration and kinetics of TM, however the drug release profile was found to be controlled by the simultaneous release of TM and HA or PVP. In the case of HA, depending on the HA:drug ratio, the release rate was decreased and controlled by the release of HA, likely due to electrostatic interactions between protonated TM and anionic HA. Overall, partitioning of the drug within the hydrophilic domains of the silicone hydrogels as well as interactions with the wetting agent determined the drug release profile.
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Affiliation(s)
- Myrto Korogiannaki
- Department of Chemical Engineering, McMaster University, Hamilton, ON, Canada
| | - Giuliano Guidi
- Department of Chemical Engineering, McMaster University, Hamilton, ON, Canada
| | - Lyndon Jones
- Department of Chemical Engineering, McMaster University, Hamilton, ON, Canada School of Optometry and Vision Science, University of Waterloo, Waterloo, ON, Canada
| | - Heather Sheardown
- Department of Chemical Engineering, McMaster University, Hamilton, ON, Canada School of Optometry and Vision Science, University of Waterloo, Waterloo, ON, Canada
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Novel Self-assembled, Gel-core Hyaluosomes for Non-invasive Management of Osteoarthritis: In-vitro Optimization, Ex-vivo and In-vivo Permeation. Pharm Res 2015; 32:2901-11. [DOI: 10.1007/s11095-015-1672-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 03/09/2015] [Indexed: 10/23/2022]
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23
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Tavazzi S, Tonveronachi M, Fagnola M, Cozza F, Ferraro L, Borghesi A, Ascagni M, Farris S. Wear effects on microscopic morphology and hyaluronan uptake in siloxane-hydrogel contact lenses. J Biomed Mater Res B Appl Biomater 2014; 103:1092-8. [DOI: 10.1002/jbm.b.33278] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 06/04/2014] [Accepted: 08/03/2014] [Indexed: 10/24/2022]
Affiliation(s)
- Silvia Tavazzi
- Materials Science Department; University of Milano Bicocca; via Cozzi 55 I-20125 Milan Italy
| | - Martina Tonveronachi
- Materials Science Department; University of Milano Bicocca; via Cozzi 55 I-20125 Milan Italy
| | - Matteo Fagnola
- Materials Science Department; University of Milano Bicocca; via Cozzi 55 I-20125 Milan Italy
| | - Federica Cozza
- Materials Science Department; University of Milano Bicocca; via Cozzi 55 I-20125 Milan Italy
| | - Lorenzo Ferraro
- Materials Science Department; University of Milano Bicocca; via Cozzi 55 I-20125 Milan Italy
| | - Alessandro Borghesi
- Materials Science Department; University of Milano Bicocca; via Cozzi 55 I-20125 Milan Italy
| | - Miriam Ascagni
- Interdepartmental Center of Advanced Microscopy; CIMA, University of Milan; via Celoria 26 I-20133 Milan Italy
| | - Stefano Farris
- DeFENS, Department of Food; Environmental and Nutritional Sciences, Packaging Division-University of Milan; Via Celoria 2 I-20133 Milan Italy
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Hsu KH, Lazon de la Jara P, Ariyavidana A, Watling J, Holden B, Garrett Q, Chauhan A. Release of Betaine and Dexpanthenol from Vitamin E Modified Silicone-Hydrogel Contact Lenses. Curr Eye Res 2014; 40:267-73. [DOI: 10.3109/02713683.2014.917192] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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25
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26
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Giji S, Arumugam M. Isolation and characterization of hyaluronic acid from marine organisms. ADVANCES IN FOOD AND NUTRITION RESEARCH 2014; 72:61-77. [PMID: 25081077 DOI: 10.1016/b978-0-12-800269-8.00004-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Hyaluronic acid (HA) being a viscous slippery substance is a multifunctional glue with immense therapeutic applications such as ophthalmic surgery, orthopedic surgery and rheumatology, drug delivery systems, pulmonary pathology, joint pathologies, and tissue engineering. Although HA has been isolated from terrestrial origin (human umbilical cord, rooster comb, bacterial sources, etc.) so far, the increasing interest on this polysaccharide significantly aroused the alternative search from marine sources since it is at the preliminary level. Enthrallingly, marine environments are considered more biologically diverse than terrestrial environments. Although numerous methods have been described for the extraction and purification of HA, the hitch on the isolation methods which greatly influences the yield as well as the molecular weight of the polymer still exists. Adaptation of suitable method is essential in this venture. Stimulated by the developed technology, to sketch the steps involved in isolation and analytical techniques for characterization of this polymer, a brief report on the concerned approach has been reviewed.
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Affiliation(s)
- Sadhasivam Giji
- Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai, Tamil Nadu, India
| | - Muthuvel Arumugam
- Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai, Tamil Nadu, India.
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27
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Reindel W, Merchea MM, Rah MJ, Zhang L. Meta-analysis of the ocular biocompatibility of a new multipurpose lens care system. Clin Ophthalmol 2013; 7:2051-6. [PMID: 24143073 PMCID: PMC3798238 DOI: 10.2147/opth.s48914] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Background The purpose of this paper is to evaluate the biocompatibility of a novel multipurpose solution (MPS) with a dual disinfectant system containing polyaminopropyl biguanide and polyquaternium-1 (Biotrue®) by analysis of biomicroscopy signs and adverse events in six large clinical trials. Methods Data from six consecutive, prospective clinical trials conducted from February 2008 to March 2010 were combined for meta-analysis. Subjects used the new MPS daily for periods of 2 weeks to 6 months. Slit-lamp signs were graded at each follow-up visit using an ordinal scale (0, one; 1, trace; 2, mild; 3, moderate; 4, severe). Analysis for biocompatibility included tracking of greater than grade 2 slit-lamp findings and number of adverse events. Results A total of 1,567 subjects (3,134 eyes) and 81 clinical investigators participated in the six studies, with 1,499 subjects completing the studies. Based on subject days in the studies, there were 72,904 exposures to the MPS and 7,212 biomicroscopy examinations. The completion rate for the studies was 96.3%. Per observation incidence of any finding greater than grade 2 at the follow-up visits were: corneal staining 0.08%, limbal injection 0.04%, bulbar injection 0.04%, tarsal conjunctiva abnormality 0.09%, and neovascularization 0.01%. There were no other slit-lamp signs greater than grade 2 and no statistically significant difference between hydrogels and silicone hydrogels for any finding. There were no reports of adverse events during the trials. Conclusion Analysis of over 72,000 daily exposures and 7,212 eye examinations showed that the novel MPS exhibited excellent biocompatibility in subjects using daily wear hydrogel or silicone hydrogel lenses.
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Kanchana S, Arumugam M, Giji S, Balasubramanian T. Isolation, characterization and antioxidant activity of hyaluronic acid from marine bivalve mollusc Amussium pleuronectus (Linnaeus, 1758). ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.bcdf.2013.06.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Shi J, Ma R, Wang L, Zhang J, Liu R, Li L, Liu Y, Hou L, Yu X, Gao J, Zhang Z. The application of hyaluronic acid-derivatized carbon nanotubes in hematoporphyrin monomethyl ether-based photodynamic therapy for in vivo and in vitro cancer treatment. Int J Nanomedicine 2013; 8:2361-73. [PMID: 23843694 PMCID: PMC3702246 DOI: 10.2147/ijn.s45407] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Carbon nanotubes (CNTs) have shown great potential in both photothermal therapy and drug delivery. In this study, a CNT derivative, hyaluronic acid-derivatized CNTs (HA-CNTs) with high aqueous solubility, neutral pH, and tumor-targeting activity, were synthesized and characterized, and then a new photodynamic therapy agent, hematoporphyrin monomethyl ether (HMME), was adsorbed onto the functionalized CNTs to develop HMME-HA-CNTs. Tumor growth inhibition was investigated both in vivo and in vitro by a combination of photothermal therapy and photodynamic therapy using HMME-HA-CNTs. The ability of HMME-HA-CNT nanoparticles to combine local specific photodynamic therapy with external near-infrared photothermal therapy significantly improved the therapeutic efficacy of cancer treatment. Compared with photodynamic therapy or photothermal therapy alone, the combined treatment demonstrated a synergistic effect, resulting in higher therapeutic efficacy without obvious toxic effects to normal organs. Overall, it was demonstrated that HMME-HA-CNTs could be successfully applied to photodynamic therapy and photothermal therapy simultaneously in future tumor therapy.
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Affiliation(s)
- Jinjin Shi
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
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30
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Bettuelli M, Trabattoni S, Fagnola M, Tavazzi S, Introzzi L, Farris S. Surface properties and wear performances of siloxane-hydrogel contact lenses. J Biomed Mater Res B Appl Biomater 2013; 101:1585-93. [DOI: 10.1002/jbm.b.32901] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 01/15/2013] [Accepted: 01/15/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Michela Bettuelli
- Department of Materials Science; University of Milano Bicocca; Via Cozzi 53 I-20125 Milano Italy
| | - Silvia Trabattoni
- Department of Materials Science; University of Milano Bicocca; Via Cozzi 53 I-20125 Milano Italy
| | - Matteo Fagnola
- Department of Materials Science; University of Milano Bicocca; Via Cozzi 53 I-20125 Milano Italy
| | - Silvia Tavazzi
- Department of Materials Science; University of Milano Bicocca; Via Cozzi 53 I-20125 Milano Italy
| | - Laura Introzzi
- Department of Food, Environmental and Nutritional Sciences (DeFENS)-Packaging Lab; University of Milan; Via Celoria 2 I-20133 Milano Italy
| | - Stefano Farris
- Department of Food, Environmental and Nutritional Sciences (DeFENS)-Packaging Lab; University of Milan; Via Celoria 2 I-20133 Milano Italy
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31
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Isolation and characterization of hyaluronic acid from the liver of marine stingray Aetobatus narinari. Int J Biol Macromol 2013; 54:84-9. [DOI: 10.1016/j.ijbiomac.2012.11.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 11/09/2012] [Accepted: 11/23/2012] [Indexed: 11/19/2022]
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32
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Physical Entrapment of Hyaluronic Acid During Synthesis Results in Extended Release From Model Hydrogel and Silicone Hydrogel Contact Lens Materials. Eye Contact Lens 2013; 39:179-85. [DOI: 10.1097/icl.0b013e318281ae06] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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33
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Harmon PS, Maziarz EP, Liu XM. Detailed characterization of hyaluronan using aqueous size exclusion chromatography with triple detection and multiangle light scattering detection. J Biomed Mater Res B Appl Biomater 2012; 100:1955-60. [PMID: 22807073 DOI: 10.1002/jbm.b.32762] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 04/30/2012] [Accepted: 06/02/2012] [Indexed: 12/21/2022]
Abstract
Hyaluronan (HA) has attracted great interest and attention from ophthalmic surgical and eye care companies owing to its unique properties. A more complete understanding of HA biopolymers has, therefore, become increasingly critical as thorough characterization of raw materials helps promote product quality and process control. Often, such detailed information requires the use of a combination of analytical techniques. In this study, we compared size exclusion chromatography (SEC) with online multiangle light scattering (SEC-MALS) and SEC with triple detection (SEC-TD) experiments for HA analysis. Three lots of commercially available eye drop grade HA were characterized by SEC-MALS and SEC-TD. The absolute molecular weight averages, molecular weight distribution, radius of gyration, and solution conformation of the three HA lots were determined and compared by the two techniques. In addition, the intrinsic viscosity and intrinsic viscosity distribution were measured by SEC-TD.
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Affiliation(s)
- Patricia S Harmon
- Bausch & Lomb, Inc., Global Research & Development, Rochester, New York 14609, USA
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Extended release of high molecular weight hydroxypropyl methylcellulose from molecularly imprinted, extended wear silicone hydrogel contact lenses. Biomaterials 2011; 32:5698-705. [DOI: 10.1016/j.biomaterials.2011.04.044] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Accepted: 04/17/2011] [Indexed: 11/21/2022]
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36
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Scheuer C, Fridman K, Barniak V, Burke S, Venkatesh S. Retention of conditioning agent hyaluronan on hydrogel contact lenses. Cont Lens Anterior Eye 2010; 33 Suppl 1:S2-6. [DOI: 10.1016/j.clae.2010.10.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2010] [Revised: 10/01/2010] [Accepted: 10/04/2010] [Indexed: 01/09/2023]
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