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Sanjanwala D, Londhe V, Trivedi R, Bonde S, Sawarkar S, Kale V, Patravale V. Polysaccharide-based hydrogels for medical devices, implants and tissue engineering: A review. Int J Biol Macromol 2024; 256:128488. [PMID: 38043653 DOI: 10.1016/j.ijbiomac.2023.128488] [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: 06/20/2023] [Revised: 11/10/2023] [Accepted: 11/27/2023] [Indexed: 12/05/2023]
Abstract
Hydrogels are highly biocompatible biomaterials composed of crosslinked three-dimensional networks of hydrophilic polymers. Owing to their natural origin, polysaccharide-based hydrogels (PBHs) possess low toxicity, high biocompatibility and demonstrate in vivo biodegradability, making them great candidates for use in various biomedical devices, implants, and tissue engineering. In addition, many polysaccharides also show additional biological activities such as antimicrobial, anticoagulant, antioxidant, immunomodulatory, hemostatic, and anti-inflammatory, which can provide additional therapeutic benefits. The porous nature of PBHs allows for the immobilization of antibodies, aptamers, enzymes and other molecules on their surface, or within their matrix, potentiating their use in biosensor devices. Specific polysaccharides can be used to produce transparent hydrogels, which have been used widely to fabricate ocular implants. The ability of PBHs to encapsulate drugs and other actives has been utilized for making neural implants and coatings for cardiovascular devices (stents, pacemakers and venous catheters) and urinary catheters. Their high water-absorption capacity has been exploited to make superabsorbent diapers and sanitary napkins. The barrier property and mechanical strength of PBHs has been used to develop gels and films as anti-adhesive formulations for the prevention of post-operative adhesion. Finally, by virtue of their ability to mimic various body tissues, they have been explored as scaffolds and bio-inks for tissue engineering of a wide variety of organs. These applications have been described in detail, in this review.
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Affiliation(s)
- Dhruv Sanjanwala
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga (E), Mumbai 400019, Maharashtra, India; Department of Pharmaceutical Sciences, College of Pharmacy, 428 Church Street, University of Michigan, Ann Arbor, MI 48109, United States.
| | - Vaishali Londhe
- SVKM's NMIMS, Shobhaben Pratapbhai College of Pharmacy and Technology Management, V.L. Mehta Road, Vile Parle (W), Mumbai 400056, Maharashtra, India
| | - Rashmi Trivedi
- Smt. Kishoritai Bhoyar College of Pharmacy, Kamptee, Nagpur 441002, Maharashtra, India
| | - Smita Bonde
- SVKM's NMIMS, School of Pharmacy and Technology Management, Shirpur Campus, Maharashtra, India
| | - Sujata Sawarkar
- Department of Pharmaceutics, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, University of Mumbai, Mumbai 400056, Maharashtra, India
| | - Vinita Kale
- Department of Pharmaceutics, Gurunanak College of Pharmacy, Kamptee Road, Nagpur 440026, Maharashtra, India
| | - Vandana Patravale
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga (E), Mumbai 400019, Maharashtra, India.
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2
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Lasowski F, Rambarran T, Rahmani V, Sheardown HD. Tethered Drug Release from Model Contact Lenses. POLYM INT 2022. [DOI: 10.1002/pi.6450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Frances Lasowski
- Department of Chemical Engineering McMaster University, 1280 Main St. W. Hamilton ON Canada L8S 4M1
| | - Talena Rambarran
- Department of Chemical Engineering McMaster University, 1280 Main St. W. Hamilton ON Canada L8S 4M1
| | - Vida Rahmani
- Department of Chemical Engineering McMaster University, 1280 Main St. W. Hamilton ON Canada L8S 4M1
| | - Heather D. Sheardown
- Department of Chemical Engineering McMaster University, 1280 Main St. W. Hamilton ON Canada L8S 4M1
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3
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Unruh RM, Bornhoeft LR, Nichols SP, Wisniewski NA, McShane MJ. Inorganic-Organic Interpenetrating Network Hydrogels as Tissue-Integrating Luminescent Implants: Physicochemical Characterization and Preclinical Evaluation. Macromol Biosci 2022; 22:e2100380. [PMID: 34847287 PMCID: PMC8930476 DOI: 10.1002/mabi.202100380] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 11/23/2021] [Indexed: 11/07/2022]
Abstract
Sensors capable of accurate, continuous monitoring of biochemistry are crucial to the realization of personalized medicine on a large scale. Great strides have been made to enhance tissue compatibility of long-term in vivo biosensors using biomaterials strategies such as tissue-integrating hydrogels. However, the low level of oxygen in tissue presents a challenge for implanted devices, especially when the biosensing function relies on oxygen as a measure-either as a primary analyte or as an indirect marker to transduce levels of other biomolecules. This work presents a method of fabricating inorganic-organic interpenetrating network (IPN) hydrogels to optimize the oxygen transport through injectable biosensors. Capitalizing on the synergy between the two networks, various physicochemical properties (e.g., swelling, glass transition temperature, and mechanical properties) are shown to be independently adjustable while maintaining a 250% increase in oxygen permeability relative to poly(2-hydroxyethyl methacrylate) controls. Finally, these gels, when functionalized with a Pd(II) benzoporphyrin phosphor, track tissue oxygen in real time for 76 days as subcutaneous implants in a porcine model while promoting tissue ingrowth and minimizing fibrosis around the implant. These findings support IPN networks for fine-tuned design of implantable biomaterials in personalized medicine and other biomedical applications.
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Affiliation(s)
- Rachel M Unruh
- 5045 Emerging Technologies Building, 3120 TAMU, College Station, TX, 77843, USA
| | - Lindsey R Bornhoeft
- 5045 Emerging Technologies Building, 3120 TAMU, College Station, TX, 77843, USA
| | - Scott P Nichols
- Profusa, Inc., 5959 Horton St #450, Emeryville, CA, 94608, USA
| | | | - Michael J McShane
- 5045 Emerging Technologies Building, 3120 TAMU, College Station, TX, 77843, USA
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4
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Pereira-da-Mota AF, Phan CM, Concheiro A, Jones L, Alvarez-Lorenzo C. Testing drug release from medicated contact lenses: The missing link to predict in vivo performance. J Control Release 2022; 343:672-702. [DOI: 10.1016/j.jconrel.2022.02.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/09/2022] [Accepted: 02/10/2022] [Indexed: 12/13/2022]
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5
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Maulvi FA, Kanani PA, Jadav HJ, Desai BV, Desai DT, Patel HP, Shetty KH, Shah DO, Willcox MD. Timolol-eluting graphene oxide laden silicone contact lens: Control release profile with improved critical lens properties. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Bodoki AE, Iacob BC, Dinte E, Vostinaru O, Samoila O, Bodoki E. Perspectives of Molecularly Imprinted Polymer-Based Drug Delivery Systems in Ocular Therapy. Polymers (Basel) 2021; 13:polym13213649. [PMID: 34771205 PMCID: PMC8588458 DOI: 10.3390/polym13213649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/19/2021] [Accepted: 10/20/2021] [Indexed: 12/15/2022] Open
Abstract
Although the human eye is an easily accessible sensory organ, it remains a challenge for drug administration due to the presence of several anatomical and physiological barriers which limit the access of drugs to its internal structures. Molecular imprinting technology may be considered the avant-garde approach in advanced drug delivery applications and, in particular, in ocular therapy. In fact, molecularly imprinted polymers hold the promise to compensate for the current shortcomings of the available arsenal of drug delivery systems intended for ocular therapy. The present manuscript aims to review the recent advances, the current challenges and most importantly to raise awareness on the underexplored potential and future perspectives of molecularly imprinted polymer-based drug delivery systems intended for the treatment of eye diseases.
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Affiliation(s)
- Andreea E. Bodoki
- Department of General and Inorganic Chemistry, “Iuliu Hatieganu” University of Medicine and Pharmacy, 400010 Cluj-Napoca, Romania;
| | - Bogdan-C. Iacob
- Department of Analytical Chemistry, “Iuliu Hatieganu” University of Medicine & Pharmacy, 400349 Cluj-Napoca, Romania;
| | - Elena Dinte
- Department of Pharmaceutical Technology and Biopharmaceutics, “Iuliu Hatieganu” University of Medicine & Pharmacy, 400012 Cluj-Napoca, Romania;
| | - Oliviu Vostinaru
- Department of Pharmacology, Physiology and Physiopathology, “Iuliu Hatieganu” University of Medicine & Pharmacy, 400349 Cluj-Napoca, Romania;
| | - Ovidiu Samoila
- Ophthalmology Clinic Cluj, “Iuliu Hatieganu” University of Medicine & Pharmacy, 400006 Cluj-Napoca, Romania;
| | - Ede Bodoki
- Department of Analytical Chemistry, “Iuliu Hatieganu” University of Medicine & Pharmacy, 400349 Cluj-Napoca, Romania;
- Correspondence: ; Tel.: +40-264-597256 (ext. 2838)
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Chang WH, Liu PY, Lin MH, Lu CJ, Chou HY, Nian CY, Jiang YT, Hsu YHH. Applications of Hyaluronic Acid in Ophthalmology and Contact Lenses. Molecules 2021; 26:molecules26092485. [PMID: 33923222 PMCID: PMC8123179 DOI: 10.3390/molecules26092485] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/16/2021] [Accepted: 04/19/2021] [Indexed: 12/15/2022] Open
Abstract
Hyaluronic acid (HA) is a glycosaminoglycan that was first isolated and identified from the vitreous body of a bull’s eye. HA is ubiquitous in the soft connective tissues of animals and therefore has high tissue compatibility for use in medication. Because of HA’s biological safety and water retention properties, it has many ophthalmology-related applications, such as in intravitreal injection, dry eye treatment, and contact lenses. Due to its broad range of applications, the identification and quantification of HA is a critical topic. This review article discusses current methods for analyzing HA. Contact lenses have become a widely used medical device, with HA commonly used as an additive to their production material, surface coating, and multipurpose solution. HA molecules on contact lenses retain moisture and increase the wearer’s comfort. HA absorbed by contact lenses can also gradually release to the anterior segment of the eyes to treat dry eye. This review discusses applications of HA in ophthalmology.
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Affiliation(s)
- Wan-Hsin Chang
- Research and Development Center, Yung Sheng Optical Company, Daya District, Taichung 42881, Taiwan; (W.-H.C.); (P.-Y.L.); (M.-H.L.); (C.-J.L.); (H.-Y.C.); (C.-Y.N.)
| | - Pei-Yi Liu
- Research and Development Center, Yung Sheng Optical Company, Daya District, Taichung 42881, Taiwan; (W.-H.C.); (P.-Y.L.); (M.-H.L.); (C.-J.L.); (H.-Y.C.); (C.-Y.N.)
| | - Min-Hsuan Lin
- Research and Development Center, Yung Sheng Optical Company, Daya District, Taichung 42881, Taiwan; (W.-H.C.); (P.-Y.L.); (M.-H.L.); (C.-J.L.); (H.-Y.C.); (C.-Y.N.)
| | - Chien-Ju Lu
- Research and Development Center, Yung Sheng Optical Company, Daya District, Taichung 42881, Taiwan; (W.-H.C.); (P.-Y.L.); (M.-H.L.); (C.-J.L.); (H.-Y.C.); (C.-Y.N.)
| | - Hsuan-Yi Chou
- Research and Development Center, Yung Sheng Optical Company, Daya District, Taichung 42881, Taiwan; (W.-H.C.); (P.-Y.L.); (M.-H.L.); (C.-J.L.); (H.-Y.C.); (C.-Y.N.)
| | - Chih-Yu Nian
- Research and Development Center, Yung Sheng Optical Company, Daya District, Taichung 42881, Taiwan; (W.-H.C.); (P.-Y.L.); (M.-H.L.); (C.-J.L.); (H.-Y.C.); (C.-Y.N.)
| | - Yuan-Ting Jiang
- Research and Development Center, Yung Sheng Optical Company, Daya District, Taichung 42881, Taiwan; (W.-H.C.); (P.-Y.L.); (M.-H.L.); (C.-J.L.); (H.-Y.C.); (C.-Y.N.)
- Correspondence: (Y.-T.J.); (Y.-H.H.H.); Tel.: +886-4-25658384 (ext. 3706) (Y.-T.J.); +886-4-23590121 (ext. 32238) (Y.-H.H.H.)
| | - Yuan-Hao Howard Hsu
- Department of Chemistry, Tunghai University, Xitun District, Taichung 40704, Taiwan
- Correspondence: (Y.-T.J.); (Y.-H.H.H.); Tel.: +886-4-25658384 (ext. 3706) (Y.-T.J.); +886-4-23590121 (ext. 32238) (Y.-H.H.H.)
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8
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Kumara BN, Shambhu R, Prasad KS. Why chitosan could be apt candidate for glaucoma drug delivery - An overview. Int J Biol Macromol 2021; 176:47-65. [PMID: 33581206 DOI: 10.1016/j.ijbiomac.2021.02.057] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 02/03/2021] [Accepted: 02/07/2021] [Indexed: 12/15/2022]
Abstract
Most of the people in the world are affected by glaucoma, which leads to irreversible blindness. Several patient friendly treatments are available, nevertheless medications lack an easy and efficient way of sustained delivery. To make the delivery with enhanced bioavailability, biodegradable and non-biodegradable polymers-based drug carriers are explored. However, ocular drug delivery issues have not been resolved yet due to less adhesiveness, poor penetration ability, pH, and temperature dependent burst releases. Chitosan is found to be effective for ocular drug delivery due to excellent physio-chemical properties in terms of overcoming the existing issues. In this review, we aim to highlight why it has been chosen and the holy grail for ocular drug delivery. Besides, we have comprehensively reviewed recent patents on chitosan as a platform for ocular drug delivery and future perspectives on factors, lacunae and challenges that need to be addressed for better ocular delivery methods for glaucoma management.
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Affiliation(s)
- B N Kumara
- Nanomaterial Research Laboratory [NMRL], Nano Division, Yenepoya Research Centre, Yenepoya [Deemed to be University], Deralakatte, Mangalore 575 018, India
| | - Rashmi Shambhu
- Department of Ophthalmology, Yenepoya Medical College, Yenepoya [Deemed to be University], Deralakatte, Mangalore 575 018, India
| | - K Sudhakara Prasad
- Nanomaterial Research Laboratory [NMRL], Nano Division, Yenepoya Research Centre, Yenepoya [Deemed to be University], Deralakatte, Mangalore 575 018, India; Centre for Nutrition Studies, Yenepoya [Deemed to be University], Deralakatte, Mangalore 575 018, India.
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9
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Hewitt MG, Morrison PWJ, Boostrom HM, Morgan SR, Fallon M, Lewis PN, Whitaker D, Brancale A, Varricchio C, Quantock AJ, Burton MJ, Heard CM. In Vitro Topical Delivery of Chlorhexidine to the Cornea: Enhancement Using Drug-Loaded Contact Lenses and β-Cyclodextrin Complexation, and the Importance of Simulating Tear Irrigation. Mol Pharm 2020; 17:1428-1441. [PMID: 32125863 DOI: 10.1021/acs.molpharmaceut.0c00140] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Microbial keratitis is a severe, sight-threatening condition caused by various pathogens. Eyedrops are the standard delivery modality for treating these disorders; however, blinking reflex, elevated tear production, and nasolacrimal drainage eliminate much of the instilled dose within a few seconds. Therefore, eyedrops must be applied repeatedly for prolonged periods. The present study aimed to probe more effective ocular delivery of chlorhexidine based upon drug-loaded hydrogel contact lenses and β-cyclodextrin (β-CD), while also determining the effect of constant irrigation with simulated tear fluid (STF) in in vitro experiments. Chlorhexidine digluconate (as 0.2 and 2% solutions, β-CD inclusion complexes, and loaded hydrogel contact lenses) were applied to enucleated porcine eyes as single or multiple 10 μL doses, or as drug-loaded contact lenses, with and without β-CD. The corneas were then excised and drug-extracted quantified by high-performance liquid chromatography (HPLC). The effect of constant irrigation by STF was evaluated to test the effect of increased tear production on corneal delivery. Potential antimicrobial activity of the delivered drug was also assessed. Results showed that drug-loaded contact lenses delivered the greatest amount of chlorhexidine into the cornea over a 24 h period, while the eyedrop solution comparator delivered the least. The β-CD significantly enhanced chlorhexidine delivery to the cornea from eyedrop solution, although contact lenses loaded with chlorhexidine-β-CD failed to enhance delivery. β-CD within the hydrogel matrix impeded drug release. Constant irrigation with STF significantly reduced the amount of drug delivered to the cornea in all cases. Chlorhexidine retained antimicrobial activity in all delivery methods. Hydrogel contact lenses loaded with chlorhexidine delivered significantly higher levels to the cornea compared to eyedrops, either multiple hourly doses or a single dose. They also offer reduced application, in particular, to a nonulcerated corneal infection. Finally, the importance of fully accounting for tear production in in vitro ocular delivery experiments was highlighted.
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Affiliation(s)
- Melissa G Hewitt
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Wales, Cardiff CF10 3NB, U.K
| | - Peter W J Morrison
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Wales, Cardiff CF10 3NB, U.K.,School of Optometry and Vision Sciences, Cardiff University, Wales, Cardiff CF24 4HQ, U.K
| | - Hannah M Boostrom
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Wales, Cardiff CF10 3NB, U.K
| | - Siân R Morgan
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Wales, Cardiff CF10 3NB, U.K.,School of Optometry and Vision Sciences, Cardiff University, Wales, Cardiff CF24 4HQ, U.K
| | - Melissa Fallon
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Wales, Cardiff CF10 3NB, U.K.,School of Optometry and Vision Sciences, Cardiff University, Wales, Cardiff CF24 4HQ, U.K
| | - Philip N Lewis
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Wales, Cardiff CF10 3NB, U.K.,School of Optometry and Vision Sciences, Cardiff University, Wales, Cardiff CF24 4HQ, U.K
| | - David Whitaker
- School of Optometry and Vision Sciences, Cardiff University, Wales, Cardiff CF24 4HQ, U.K.,School of Healthcare Sciences, Cardiff University, Wales, Cardiff CF24 4HQ, U.K
| | - Andrea Brancale
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Wales, Cardiff CF10 3NB, U.K
| | - Carmine Varricchio
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Wales, Cardiff CF10 3NB, U.K
| | - Andrew J Quantock
- School of Optometry and Vision Sciences, Cardiff University, Wales, Cardiff CF24 4HQ, U.K
| | - Matthew J Burton
- International Centre for Eye Health, Faculty of Infectious & Tropical Diseases, London School of Hygiene and Tropical Medicine, London WC1E 7HT, U.K.,Moorfields Eye Hospital NHS Foundation Trust, London EC1V 2PD, U.K
| | - Charles M Heard
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Wales, Cardiff CF10 3NB, U.K
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10
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Alvarez-Lorenzo C, Anguiano-Igea S, Varela-García A, Vivero-Lopez M, Concheiro A. Bioinspired hydrogels for drug-eluting contact lenses. Acta Biomater 2019; 84:49-62. [PMID: 30448434 DOI: 10.1016/j.actbio.2018.11.020] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 10/29/2018] [Accepted: 11/14/2018] [Indexed: 12/14/2022]
Abstract
Efficient ocular drug delivery that can overcome the challenges of topical application has been largely pursued. Contact lenses (CLs) may act as light-transparent cornea/sclera bandages for prolonged drug release towards the post-lens tear fluid, if their composition and inner architecture are fitted to the features of the drug molecules. In this review, first the foundations and advantages of using CLs as ocular drug depots are revisited. Then, pros and cons of common strategies to prepare drug-loaded CLs are analyzed on the basis of recent examples, and finally the main section focuses on bioinspired strategies that can overcome some limitations of current designs. Most bioinspired strategies resemble a reverse engineering process to create artificial receptors for the drug inside the CL network by mimicking the human natural binding site of the drug. Related bioinspired strategies are being also tested for designing CLs that elute comfort ingredients mimicking the blinking-associated renewal of eye mucins. Other bioinspired approaches exploit the natural eye variables as stimuli to trigger drug release or take benefit of bio-glues to specifically bind active components to the CL surface. Overall, biomimicking approaches are being revealed as valuable tools to fit the amounts loaded and the release profiles to the therapeutic demands of each pathology. STATEMENT OF SIGNIFICANCE: Biomimetic and bioinspired strategies are remarkable tools for the optimization of drug delivery systems. Translation of the knowledge about how drugs interact with the natural pharmacological receptor and about components and dynamics of anterior eye segment may shed light on the design criteria for obtaining efficient drug-eluting CLs. Current strategies for endowing CLs with controlled drug release performance still require optimization regarding amount loaded, drug retained in the CL structure during storage, regulation of drug release once applied onto the eye, and maintenance of CL physical properties. All these limitations may be addressed through a variety of recently growing bioinspired approaches, which are expected to pave the way of medicated CLs towards the clinics.
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Affiliation(s)
- Carmen Alvarez-Lorenzo
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, R+D Pharma Group (GI-1645), Facultad de Farmacia and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Soledad Anguiano-Igea
- HGBeyond Materials Science S.L, Edificio Emprendia, Campus Vida s/n, 15782 Santiago de Compostela, Spain
| | - Angela Varela-García
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, R+D Pharma Group (GI-1645), Facultad de Farmacia and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain; HGBeyond Materials Science S.L, Edificio Emprendia, Campus Vida s/n, 15782 Santiago de Compostela, Spain
| | - María Vivero-Lopez
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, R+D Pharma Group (GI-1645), Facultad de Farmacia and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Angel Concheiro
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, R+D Pharma Group (GI-1645), Facultad de Farmacia and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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11
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Electrically atomised formulations of timolol maleate for direct and on-demand ocular lens coatings. Eur J Pharm Biopharm 2017. [DOI: 10.1016/j.ejpb.2017.06.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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12
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Battistini F, Tártara L, Boiero C, Guzmán M, Luciani-Giaccobbe L, Palma S, Allemandi D, Manzo R, Olivera M. The role of hyaluronan as a drug carrier to enhance the bioavailability of extended release ophthalmic formulations. Hyaluronan-timolol ionic complexes as a model case. Eur J Pharm Sci 2017; 105:188-194. [DOI: 10.1016/j.ejps.2017.05.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 04/20/2017] [Accepted: 05/11/2017] [Indexed: 12/01/2022]
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13
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Approaches in topical ocular drug delivery and developments in the use of contact lenses as drug-delivery devices. Ther Deliv 2017. [DOI: 10.4155/tde-2017-0018] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Drug-delivery approaches have diversified over the last two decades with the emergence of nanotechnologies, smart polymeric systems and multimodal functionalities. The intended target for specific treatment of disease is the key defining developing parameter. One such area which has undergone significant advancements relates to ocular delivery. This has been expedited by the development of material advancement, mechanistic concepts and through the deployment of advanced process technologies. This review will focus on the developments within lens-based drug delivery while touching on conventional and current methods of topical ocular drug delivery. A summary table will provide quick reference to note the key findings in this area. In addition, the review also elucidates current theranostic and diagnostic approaches based on ocular lenses.
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Molecularly imprinted polymers based drug delivery devices: a way to application in modern pharmacotherapy. A review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:1344-1353. [PMID: 28482502 DOI: 10.1016/j.msec.2017.02.138] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Revised: 12/14/2016] [Accepted: 02/24/2017] [Indexed: 01/26/2023]
Abstract
This review presents the current status of molecularly imprinted polymers (MIPs) for drug delivery, in particular the studies that focus on biocompatibility, cytotoxicity, and in vitro or in vivo behavior of MIPs. It also shows the limitations that hamper the introduction of MIPs to pharmacotherapy and prevent this class of polymers from commercialization. MIPs are promising materials in the construction of drug delivery devices because they can provide improved delivery profiles or longer release times and deliver the drugs in the feedback regulated way, which is extremely important in modern pharmacotherapy. Here, a brief overview of the imprinting process and a concise description of drug release mechanisms from the imprinted materials will be presented followed by the discussion of potential MIP drug delivery devices for ocular, dermal, intravenous and oral routes of administration. Finally, future prospects for imprinted drug delivery forms will be outlined.
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15
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Qin G, Zhu Z, Li S, McDermott AM, Cai C. Development of ciprofloxacin-loaded contact lenses using fluorous chemistry. Biomaterials 2017; 124:55-64. [PMID: 28188995 DOI: 10.1016/j.biomaterials.2017.01.046] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 01/17/2017] [Accepted: 01/29/2017] [Indexed: 02/06/2023]
Abstract
In this work, we developed a simple method to load drugs into commercially available contact lenses utilizing fluorous chemistry. We demonstrated this method using model compounds including fluorous-tagged fluorescein and antibiotic ciprofloxacin. We showed that fluorous interactions facilitated the loading of model molecules into fluorocarbon-containing contact lenses, and that the release profiles exhibited sustained release. Contact lenses loaded with fluorous-tagged ciprofloxacin exhibited antimicrobial activity against Pseudomonas aeruginosa in vitro, while no cytotoxicity towards human corneal epithelial cells was observed. To mimic the tear turnover, we designed a porcine eye infection model under flow conditions. Significantly, the modified lenses also exhibited antimicrobial efficacy against Pseudomonas aeruginosa in the ex vivo infection model. Overall, utilizing fluorous chemistry, we can construct a drug delivery system that exhibits high drug loading capacity, sustained drug release, and robust biological activity.
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Affiliation(s)
- Guoting Qin
- College of Optometry, University of Houston, Houston, TX, 77204, USA.
| | - Zhiling Zhu
- Department of Chemistry, University of Houston, Houston, TX, 77204, USA
| | - Siheng Li
- Department of Chemistry, University of Houston, Houston, TX, 77204, USA
| | | | - Chengzhi Cai
- Department of Chemistry, University of Houston, Houston, TX, 77204, USA.
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Lavik E, Kuehn MH, Shoffstall AJ, Atkins K, Dumitrescu AV, Kwon YH. Sustained Delivery of Timolol Maleate for Over 90 Days by Subconjunctival Injection. J Ocul Pharmacol Ther 2016; 32:642-649. [PMID: 27835065 PMCID: PMC5165680 DOI: 10.1089/jop.2016.0042] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 09/03/2016] [Indexed: 12/29/2022] Open
Abstract
PURPOSE Medical treatment of glaucoma relies on intraocular pressure (IOP)-lowering medications, typically administered daily by the patient. While these medications are effective when applied correctly, patient adherence is a major obstacle in glaucoma treatment. We have developed a sustained-release formulation of timolol maleate that can be injected subconjunctivally to avoid patient noncompliance. METHODS A biodegradable microsphere formulation for timolol maleate was injected subconjunctivally in normal rabbits. We measured timolol levels in tears, aqueous humor, vitreous humor, and serum of study rabbits. Furthermore, IOP profiles were recorded longitudinally. Tissue compatibility and side effects were evaluated using histochemistry. RESULTS The microsphere formulation led to measureable amounts of timolol in the aqueous humor and the tear film for up to 90 days. Timolol was not detectable in the serum at any time. A significant reduction of IOP was observed in treated eyes. Clinically, the subconjunctival administration of the microspheres was well tolerated with no signs of inflammation or infection. The absence of local inflammation was confirmed by histology. CONCLUSIONS A single subconjunctival administration of timolol microspheres achieved delivery and IOP reduction in rabbits for up to 90 days without local or systemic inflammation or toxicity. This approach has the potential to improve the management of glaucoma in patient populations, who are challenged to adhere to a regimen of daily eye drops.
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Affiliation(s)
- Erin Lavik
- Department of Chemical, Biochemical, and Environmental Engineering, University of Maryland-Baltimore County, Baltimore, Maryland
| | - Markus H. Kuehn
- Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, Iowa
- Iowa City Veterans Affairs Center for the Prevention and Treatment of Visual Loss, Iowa City, Iowa
| | - Andrew J. Shoffstall
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio
| | - Kristyn Atkins
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio
| | - Alina V. Dumitrescu
- Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, Iowa
| | - Young H. Kwon
- Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, Iowa
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Lee D, Cho S, Park HS, Kwon I. Ocular Drug Delivery through pHEMA-Hydrogel Contact Lenses Co-Loaded with Lipophilic Vitamins. Sci Rep 2016; 6:34194. [PMID: 27678247 PMCID: PMC5039753 DOI: 10.1038/srep34194] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 09/08/2016] [Indexed: 12/04/2022] Open
Abstract
Ocular drug delivery through hydrogel contact lenses has great potential for the treatment of ocular diseases. Previous studies showed that the loading of lipophilic vitamin E to silicone-hydrogel contact lenses was beneficial in ocular drug delivery. We hypothesized that vitamin E loading to another type of popular hydrogel contact lenses, pHEMA-hydrogel contact lenses, improves ocular drug delivery by increasing the drug loading or the duration of drug release. Loading of vitamin E to pHEMA-hydrogel contact lenses significantly increased the loading of a hydrophilic drug surrogate (Alexa Fluor 488 dye) and two hydrophilic glaucoma drugs (timolol and brimonidine) to the lenses by 37.5%, 19.1%, and 18.7%, respectively. However, the release duration time was not significantly altered. Next, we hypothesized that the lipophilic nature of vitamin E attributes to the enhanced drug loading. Therefore, we investigated the effects of co-loading of another lipophilic vitamin, vitamin A, on drug surrogate delivery. We found out that vitamin A loading also increased the loading of the drug surrogate to pHEMA-hydrogel contact lenses by 30.3%. Similar to vitamin E loading, vitamin A loading did not significantly alter the release duration time of the drug or drug surrogate.
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Affiliation(s)
- Dasom Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Seungkwon Cho
- GEO medical Co., Ltd, Gwangju 61007, Republic of Korea
| | - Hwa Sung Park
- GEO medical Co., Ltd, Gwangju 61007, Republic of Korea
| | - Inchan Kwon
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.,Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
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Lasowski F, Sheardown H. Atropine and Roscovitine Release from Model Silicone Hydrogels. Optom Vis Sci 2016; 93:404-11. [PMID: 26779867 DOI: 10.1097/opx.0000000000000807] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
PURPOSE Drug delivery to the anterior eye has a low compliance and results in significant drug losses. In pediatric patients, eye diseases such as myopia and retinoblastoma can potentially be treated pharmacologically, but the risk associated with high drug concentrations coupled with the need for regular dosing limits their effectiveness. The current study examined the feasibility of atropine and roscovitine delivery from model silicone hydrogel materials which could potentially be used to treat myopia and retinoblastoma, respectively. METHODS Model silicone hydrogel materials that comprised TRIS and DMA were prepared with the drug incorporated during synthesis. Various materials properties, with and without incorporated drug, were investigated including water uptake, water contact angle, and light transmission. Drug release was evaluated under sink conditions into phosphate buffered saline. RESULTS The results demonstrate that up to 2 wt% of the drugs can be incorporated into model silicone hydrogel materials without adversely affecting critical materials properties such as water uptake, light transmission, and surface hydrophilicity. Equilibrium water content ranged from 15 to 32% and transmission exceeded 89% for materials with at least 70% DMA. Extended release exceeding 14 days was possible with both drugs, with the total amount of drug released from the materials ranging from 16% to over 76%. Although a burst effect was noted, this was thought to be due to surface-bound drug, and therefore storage in an appropriate packaging solution could be used to overcome this if desired. CONCLUSIONS Silicone hydrogel materials have the potential to deliver drugs for over 2 weeks without compromising lens properties. This could potentially overcome the need for regular drop instillation and allow for the maintenance of drug concentration in the tear film over the period of wear. This represents a potential option for treating a host of ophthalmic disorders in children including myopia and retinoblastoma.
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Affiliation(s)
- Frances Lasowski
- *BEng †PhD Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada (all authors)
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Sah AK, Suresh PK. Medical management of glaucoma: focus on ophthalmologic drug delivery systems of timolol maleate. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2016; 45:448-459. [DOI: 10.3109/21691401.2016.1160917] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Abhishek K. Sah
- Faculty of Technology, University Institute of Pharmacy, Pt. Ravishankar Shukla University, Raipur, Chhattishgarh, India
| | - Preeti K. Suresh
- Faculty of Technology, University Institute of Pharmacy, Pt. Ravishankar Shukla University, Raipur, Chhattishgarh, India
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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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Chen YS, Green CR, Danesh-Meyer HV, Rupenthal ID. Neuroprotection in the treatment of glaucoma--A focus on connexin43 gap junction channel blockers. Eur J Pharm Biopharm 2015; 95:182-93. [PMID: 25676338 DOI: 10.1016/j.ejpb.2015.01.031] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 12/23/2014] [Accepted: 01/07/2015] [Indexed: 01/01/2023]
Abstract
Glaucoma is a form of optic neuropathy and a common cause of blindness, affecting over 60 million people worldwide with an expected rise to 80 million by 2020. Successful treatment is challenging due to the various causes of glaucoma, undetectable symptoms at an early stage and inefficient delivery of drugs to the back of the eye. Conventional glaucoma treatments focus on the reduction of elevated intraocular pressure (IOP) using topical eye drops. However, their efficacy is limited to patients who suffer from high IOP glaucoma and do not address the underlying susceptibility of retinal ganglion cells (RGC) to degeneration. Glaucoma is known as a neurodegenerative disease which starts with RGC death and eventually results in damage of the optic nerve. Neuroprotective strategies therefore offer a novel treatment option for glaucoma by not only preventing neuronal loss but also disease progression. This review firstly gives an overview of the pathophysiology of glaucoma as well as current treatment options including conventional and novel delivery strategies. It then summarizes the rational for neuroprotection as a novel therapy for glaucomatous neuropathies and reviews current potential neuroprotective strategies to preserve RGC, with a focus on connexin43 (Cx43) gap junction channel blockers.
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Affiliation(s)
- Ying-Shan Chen
- Buchanan Ocular Therapeutics Unit, Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Colin R Green
- Buchanan Ocular Therapeutics Unit, Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Helen V Danesh-Meyer
- Buchanan Ocular Therapeutics Unit, Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Ilva D Rupenthal
- Buchanan Ocular Therapeutics Unit, Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
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