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Dmour I. Absorption enhancement strategies in chitosan-based nanosystems and hydrogels intended for ocular delivery: Latest advances for optimization of drug permeation. Carbohydr Polym 2024; 343:122486. [PMID: 39174104 DOI: 10.1016/j.carbpol.2024.122486] [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: 01/30/2024] [Revised: 06/24/2024] [Accepted: 07/09/2024] [Indexed: 08/24/2024]
Abstract
Ophthalmic diseases can be presented as acute diseases like allergies, ocular infections, etc., or chronic ones that can be manifested as a result of systemic disorders, like diabetes mellitus, thyroid, rheumatic disorders, and others. Chitosan (CS) and its derivatives have been widely investigated as nanocarriers in the delivery of drugs, genes, and many biological products. The biocompatibility and biodegradability of CS made it a good candidate for ocular delivery of many ingredients, including immunomodulating agents, antibiotics, ocular hypertension medications, etc. CS-based nanosystems have been successfully reported to modulate ocular diseases by penetrating biological ocular barriers and targeting and controlling drug release. This review provides guidance to drug delivery formulators on the most recently published strategies that can enhance drug permeation to the ocular tissues in CS-based nanosystems, thus improving therapeutic effects through enhancing drug bioavailability. This review will highlight the main ocular barriers to drug delivery observed in the nano-delivery system. In addition, the CS physicochemical properties that contribute to formulation aspects are discussed. It also categorized the permeation enhancement strategies that can be optimized in CS-based nanosystems into four aspects: CS-related physicochemical properties, formulation components, fabrication conditions, and adopting a novel delivery system like implants, inserts, etc. as described in the published literature within the last ten years. Finally, challenges encountered in CS-based nanosystems and future perspectives are mentioned.
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Affiliation(s)
- Isra Dmour
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, The Hashemite University, Zarqa, Jordan.
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2
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Wei J, Mu J, Tang Y, Qin D, Duan J, Wu A. Next-generation nanomaterials: advancing ocular anti-inflammatory drug therapy. J Nanobiotechnology 2023; 21:282. [PMID: 37598148 PMCID: PMC10440041 DOI: 10.1186/s12951-023-01974-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 06/29/2023] [Indexed: 08/21/2023] Open
Abstract
Ophthalmic inflammatory diseases, including conjunctivitis, keratitis, uveitis, scleritis, and related conditions, pose considerable challenges to effective management and treatment. This review article investigates the potential of advanced nanomaterials in revolutionizing ocular anti-inflammatory drug interventions. By conducting an exhaustive analysis of recent advancements and assessing the potential benefits and limitations, this review aims to identify promising avenues for future research and clinical applications. The review commences with a detailed exploration of various nanomaterial categories, such as liposomes, dendrimers, nanoparticles (NPs), and hydrogels, emphasizing their unique properties and capabilities for accurate drug delivery. Subsequently, we explore the etiology and pathophysiology of ophthalmic inflammatory disorders, highlighting the urgent necessity for innovative therapeutic strategies and examining recent preclinical and clinical investigations employing nanomaterial-based drug delivery systems. We discuss the advantages of these cutting-edge systems, such as biocompatibility, bioavailability, controlled release, and targeted delivery, alongside potential challenges, which encompass immunogenicity, toxicity, and regulatory hurdles. Furthermore, we emphasize the significance of interdisciplinary collaborations among material scientists, pharmacologists, and clinicians in expediting the translation of these breakthroughs from laboratory environments to clinical practice. In summary, this review accentuates the remarkable potential of advanced nanomaterials in redefining ocular anti-inflammatory drug therapy. We fervently support continued research and development in this rapidly evolving field to overcome existing barriers and improve patient outcomes for ophthalmic inflammatory disorders.
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Affiliation(s)
- Jing Wei
- School of Ophthalmology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - Jinyu Mu
- School of Ophthalmology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - Yong Tang
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability Evaluation, Education Ministry Key Laboratory of Medical Electrophysiology, School of Pharmacy, Southwest Medical University, Luzhou, 646000, China
| | - Dalian Qin
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability Evaluation, Education Ministry Key Laboratory of Medical Electrophysiology, School of Pharmacy, Southwest Medical University, Luzhou, 646000, China
| | - Junguo Duan
- School of Ophthalmology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China.
| | - Anguo Wu
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability Evaluation, Education Ministry Key Laboratory of Medical Electrophysiology, School of Pharmacy, Southwest Medical University, Luzhou, 646000, China.
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3
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Chitosan/HPMC-based mucoadhesive film co-loaded with fluconazole and ofloxacin for management of polymicrobial keratitis. Int J Biol Macromol 2022; 222:2785-2795. [DOI: 10.1016/j.ijbiomac.2022.10.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/07/2022] [Accepted: 10/07/2022] [Indexed: 11/05/2022]
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Afarid M, Mahmoodi S, Baghban R. Recent achievements in nano-based technologies for ocular disease diagnosis and treatment, review and update. J Nanobiotechnology 2022; 20:361. [PMID: 35918688 PMCID: PMC9344723 DOI: 10.1186/s12951-022-01567-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 07/19/2022] [Indexed: 11/10/2022] Open
Abstract
Ocular drug delivery is one of the most challenging endeavors among the various available drug delivery systems. Despite having suitable drugs for the treatment of ophthalmic disease, we have not yet succeeded in achieving a proper drug delivery approach with the least adverse effects. Nanotechnology offers great opportunities to overwhelm the restrictions of common ocular delivery systems, including low therapeutic effects and adverse effects because of invasive surgery or systemic exposure. The present review is dedicated to highlighting and updating the recent achievements of nano-based technologies for ocular disease diagnosis and treatment. While further effort remains, the progress illustrated here might pave the way to new and very useful ocular nanomedicines.
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Affiliation(s)
- Mehrdad Afarid
- Poostchi Ophthalmology Research Center, Department of Ophthalmology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Shirin Mahmoodi
- Department of Medical Biotechnology, School of Medicine, Fasa University of Medical Sciences, Fasa, Iran
| | - Roghayyeh Baghban
- Poostchi Ophthalmology Research Center, Department of Ophthalmology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.
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Lee K, Lee G, Lee S, Park CY. Advances in ophthalmic drug delivery technology for postoperative management after cataract surgery. Expert Opin Drug Deliv 2022; 19:945-964. [PMID: 35917497 DOI: 10.1080/17425247.2022.2109624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Cataract surgery is becoming more common due to an aging world population. Intraocular lenses and surgical technique have developed remarkably recently, but the development of postoperative medication to prevent postsurgery complications has been relatively delayed. We still largely depend on eye drops for the management of post-cataract-surgery patients. Mental and physical problems that often occur in elderly cataract patients make it difficult for patients to apply eye drops by themselves. It is necessary to develop new effective drug delivery methods. AREAS COVERED This updated review article provides a brief review of why drug management is needed following cataract surgery and an overview of current developments in new drug delivery methods for ophthalmic treatment. In particular, various novel drug delivery methods that can be used for post-cataract-surgery management and their current development stages are extensively reviewed. EXPERT OPINION Rapidly developing technologies, such as intraocular and external ophthalmic implants, polymers, and nanotechnology, are being actively applied to develop novel drug delivery systems for safe and effective management after cataract surgery. Their goal is to achieve sufficient drug release for the desired duration with a single application. These will largely replace the inconvenience of eye drops for elderly patients in the future.
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Affiliation(s)
- Kangmin Lee
- Department of Ophthalmology, Dongguk University, Ilsan Hospital, Goyang, South Korea
| | - Gahye Lee
- Department of Ophthalmology, Dongguk University, Ilsan Hospital, Goyang, South Korea
| | - Soomin Lee
- Department of Ophthalmology, Dongguk University, Ilsan Hospital, Goyang, South Korea
| | - Choul Yong Park
- Department of Ophthalmology, Dongguk University, Ilsan Hospital, Goyang, South Korea
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Sustained ocular delivery of desmopressin acetate via thermoreversible in situ gel formulation: preparation and in vitro/in vivo evaluation. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2022. [DOI: 10.1007/s40005-022-00592-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ricci F, Racaniello GF, Lopedota A, Laquintana V, Arduino I, Lopalco A, Cutrignelli A, Franco M, Sigurdsson HH, Denora N. Chitosan/sulfobutylether-β-cyclodextrin based nanoparticles coated with thiolated hyaluronic acid for indomethacin ophthalmic delivery. Int J Pharm 2022; 622:121905. [PMID: 35697201 DOI: 10.1016/j.ijpharm.2022.121905] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 06/03/2022] [Accepted: 06/07/2022] [Indexed: 12/18/2022]
Abstract
Indomethacin (IND) is topically administered for the treatment of the anterior segment diseases such as conjunctivitis, uveitis, and inflammation prevention for post-cataract surgery, as well as posterior segment diseases as macular edema. Currently IND is available as 0.1% w/v hydroxypropyl-β-cyclodextrin-based eye drop formulation and its bioavailability is limited by several drawbacks such as the nasolacrimal duct draining, the reflex blinking and the low volume of the conjunctival sac. In this study, chitosan (CS)/sulfobutylether-β-cyclodextrin (SBE-β-CD) based nanoparticles (NPs) with a mean diameter of 340 (±7) nm, a ζ-potential value of +18.3 (±0.5) mV and coated with thiolated low molecular weight hyaluronic acid were formulated to improve both the solubility and the residential time in the conjunctival sac of the loaded drug IND. The NPs were prepared through the ionotropic gelation technique, exploiting the interaction between the positively charged amino group of CS and the negatively charged sulfonic group of SBE-β-CD. The mucoadhesive properties of the NPs were evaluated on chicken trachea and esophagus tissues using a texture analyser. The irritability effects of NPs were disclaimed with Hecam test. The developed coated NPs showed increased residential time in the conjunctival sac, displayed no irritancy or toxicity for local administration, making them an optimal and innovative drug delivery system for the treatment of anterior segment inflammation diseases. On the other hand, the uncoated NPs displayed better permeating properties since they are smaller and could be further exploited for the treatment of posterior segment diseases.
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Affiliation(s)
- Fabrizio Ricci
- Department of Pharmacy - Pharmaceutical Sciences, University of Bari "Aldo Moro", 70125 Bari, Italy; Department of Pharmaceutical Technology, University of Innsbruck, Institute of Pharmacy, Center for Chemistry and Biomedicine, 6020 Innsbruck, Austria
| | | | - Angela Lopedota
- Department of Pharmacy - Pharmaceutical Sciences, University of Bari "Aldo Moro", 70125 Bari, Italy
| | - Valentino Laquintana
- Department of Pharmacy - Pharmaceutical Sciences, University of Bari "Aldo Moro", 70125 Bari, Italy
| | - Ilaria Arduino
- Department of Pharmacy - Pharmaceutical Sciences, University of Bari "Aldo Moro", 70125 Bari, Italy
| | - Antonio Lopalco
- Department of Pharmacy - Pharmaceutical Sciences, University of Bari "Aldo Moro", 70125 Bari, Italy
| | - Annalisa Cutrignelli
- Department of Pharmacy - Pharmaceutical Sciences, University of Bari "Aldo Moro", 70125 Bari, Italy
| | - Massimo Franco
- Department of Pharmacy - Pharmaceutical Sciences, University of Bari "Aldo Moro", 70125 Bari, Italy
| | | | - Nunzio Denora
- Department of Pharmacy - Pharmaceutical Sciences, University of Bari "Aldo Moro", 70125 Bari, Italy.
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8
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Kesharwani P, Bisht A, Alexander A, Dave V, Sharma S. Biomedical applications of hydrogels in drug delivery system: An update. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102914] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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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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10
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Yu H, Wu W, Lin X, Feng Y. Polysaccharide-Based Nanomaterials for Ocular Drug Delivery: A Perspective. Front Bioeng Biotechnol 2020; 8:601246. [PMID: 33363130 PMCID: PMC7758246 DOI: 10.3389/fbioe.2020.601246] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 11/05/2020] [Indexed: 12/30/2022] Open
Abstract
Ocular drug delivery is one of the most challenging issues in ophthalmology because of the complex physiological structure of the eye. Polysaccharide-based nanomaterials have been extensively investigated in recent years as ideal carriers for enhancing the bioavailability of drugs in the ocular system because of their biocompatibility and drug solubilization. From this perspective, we discuss the structural instability of polysaccharides and its impact on the synthesis process; examine the potential for developing bioactive polysaccharide-based ocular drug nanocarriers; propose four strategies for designing novel drug delivery nanomaterials; and suggest reviewing the behavior of nanomaterials in ocular tissues.
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Affiliation(s)
- Haozhe Yu
- Institute of Medical Technology, Peking University Health Science Center, Beijing, China
- Department of Ophthalmology, Peking University Third Hospital, Beijing, China
| | - Wenyu Wu
- Department of Ophthalmology, Peking University Third Hospital, Beijing, China
| | - Xiang Lin
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, China
| | - Yun Feng
- Institute of Medical Technology, Peking University Health Science Center, Beijing, China
- Department of Ophthalmology, Peking University Third Hospital, Beijing, China
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Zamboulis A, Nanaki S, Michailidou G, Koumentakou I, Lazaridou M, Ainali NM, Xanthopoulou E, Bikiaris DN. Chitosan and its Derivatives for Ocular Delivery Formulations: Recent Advances and Developments. Polymers (Basel) 2020; 12:E1519. [PMID: 32650536 PMCID: PMC7407599 DOI: 10.3390/polym12071519] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/03/2020] [Accepted: 07/03/2020] [Indexed: 02/06/2023] Open
Abstract
Chitosan (CS) is a hemi-synthetic cationic linear polysaccharide produced by the deacetylation of chitin. CS is non-toxic, highly biocompatible, and biodegradable, and it has a low immunogenicity. Additionally, CS has inherent antibacterial properties and a mucoadhesive character and can disrupt epithelial tight junctions, thus acting as a permeability enhancer. As such, CS and its derivatives are well-suited for the challenging field of ocular drug delivery. In the present review article, we will discuss the properties of CS that contribute to its successful application in ocular delivery before reviewing the latest advances in the use of CS for the development of novel ophthalmic delivery systems. Colloidal nanocarriers (nanoparticles, micelles, liposomes) will be presented, followed by CS gels and lenses and ocular inserts. Finally, instances of CS coatings, aiming at conferring mucoadhesiveness to other matrixes, will be presented.
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Affiliation(s)
- Alexandra Zamboulis
- Laboratory of Polymer Chemistry & Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (S.N.); (G.M.); (I.K.); (M.L.); (N.M.A.); (E.X.)
| | | | | | | | | | | | | | - Dimitrios N. Bikiaris
- Laboratory of Polymer Chemistry & Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (S.N.); (G.M.); (I.K.); (M.L.); (N.M.A.); (E.X.)
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12
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Lynch CR, Kondiah PPD, Choonara YE, du Toit LC, Ally N, Pillay V. Hydrogel Biomaterials for Application in Ocular Drug Delivery. Front Bioeng Biotechnol 2020; 8:228. [PMID: 32266248 PMCID: PMC7099765 DOI: 10.3389/fbioe.2020.00228] [Citation(s) in RCA: 91] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 03/05/2020] [Indexed: 12/13/2022] Open
Abstract
There are many challenges involved in ocular drug delivery. These are a result of the many tissue barriers and defense mechanisms that are present with the eye; such as the cornea, conjunctiva, the blinking reflex, and nasolacrimal drainage system. This leads to many of the conventional ophthalmic preparations, such as eye drops, having low bioavailability profiles, rapid removal from the administration site, and thus ineffective delivery of drugs. Hydrogels have been investigated as a delivery system which is able to overcome some of these challenges. These have been formulated as standalone systems or with the incorporation of other technologies such as nanoparticles. Hydrogels are able to be formulated in such a way that they are able to change from a liquid to gel as a response to a stimulus; known as "smart" or stimuli-responsive biotechnology platforms. Various different stimuli-responsive hydrogel systems are discussed in this article. Hydrogel drug delivery systems are able to be formulated from both synthetic and natural polymers, known as biopolymers. This review focuses on the formulations which incorporate biopolymers. These polymers have a number of benefits such as the fact that they are biodegradable, biocompatible, and non-cytotoxic. The biocompatibility of the polymers is essential for ocular drug delivery systems because the eye is an extremely sensitive organ which is known as an immune privileged site.
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Affiliation(s)
- Courtney R. Lynch
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Pierre P. D. Kondiah
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Yahya E. Choonara
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Lisa C. du Toit
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Naseer Ally
- Division of Ophthalmology, Department of Neurosciences, School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Viness Pillay
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
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Abstract
Glaucoma is the second leading cause of blindness worldwide. Even though significant advances have been made in its management, currently available antiglaucoma therapies suffer from considerable drawbacks. Typically, the success and efficacy of glaucoma medications are undermined by their limited bioavailability to target tissues and the inadequate adherence demonstrated by patients with glaucoma. The latter is due to a gradual decrease in tolerability of lifelong topical therapies and the significant burden to patients of prescribed stepwise antiglaucoma regimens with frequent dosing which impact quality of life. On the other hand, glaucoma surgery is restricted by the inability of antifibrotic agents to efficiently control the wound healing process without causing severe collateral damage and long-term complications. Evolution of the treatment paradigm for patients with glaucoma will ideally include prevention of retinal ganglion cell degeneration by the successful delivery of neurotrophic factors, anti-inflammatory drugs, and gene therapies. Nanotechnology-based treatments may surpass the limitations of currently available glaucoma therapies through optimized targeted drug delivery, increased bioavailability, and controlled release. This review addresses the recent advances in glaucoma treatment strategies employing nanotechnology, including medical and surgical management, neuroregeneration, and neuroprotection.
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Schiff base functionalized chitosan anion exchange membranes with 1,4-dichlorobutane as the crosslinker. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.06.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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Abilova GK, Kaldybekov DB, Ozhmukhametova EK, Saimova AZ, Kazybayeva DS, Irmukhametova GS, Khutoryanskiy VV. Chitosan/poly(2-ethyl-2-oxazoline) films for ocular drug delivery: Formulation, miscibility, in vitro and in vivo studies. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.04.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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16
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Mehta P, Al-Kinani AA, Arshad MS, Singh N, van der Merwe SM, Chang MW, Alany RG, Ahmad Z. Engineering and Development of Chitosan-Based Nanocoatings for Ocular Contact Lenses. J Pharm Sci 2019; 108:1540-1551. [DOI: 10.1016/j.xphs.2018.11.036] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 10/28/2018] [Accepted: 11/07/2018] [Indexed: 12/15/2022]
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Cross-linked hyaluronan films loaded with acetazolamide-cyclodextrin-triethanolamine complexes for glaucoma treatment. Ther Deliv 2019; 9:205-220. [PMID: 29424292 DOI: 10.4155/tde-2017-0087] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
AIM This work aimed to design and characterize cross-linked hyaluronic acid-itaconic acid films loaded with acetazolamide-hydroxypropyl β cyclodextrin-triethanolamine complexes. MATERIALS & METHODS Films were cross-linked with itaconic acid and poly(ethyleneglycol)-diglycidylether. Biopharmaceutical properties were assessed by evaluating in vitro drug release rate, biocompatibility in a human corneal epithelial cell line, bioadhesiveness with pig gastric mucin, in vivo bioadhesion and efficacy. RESULTS Showed good mechanical properties and oxygen permeability. Proliferation rate of corneal cells was affected by highest acetazolamide concentration. Bioadhesive interaction exhibited a water movement from pig mucin to the film; in vivo experiments showed strong bioadhesion for 8 h and hypotensive effect for almost 20 h. CONCLUSION Experimental set showed promising performance and encouraged future studies to optimize formulation. [Formula: see text].
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Mirzaeei S, Berenjian K, Khazaei R. Preparation of the Potential Ocular Inserts by Electrospinning Method to Achieve the Prolong Release Profile of Triamcinolone Acetonide. Adv Pharm Bull 2018; 8:21-27. [PMID: 29670835 PMCID: PMC5896392 DOI: 10.15171/apb.2018.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 02/12/2018] [Accepted: 02/13/2018] [Indexed: 01/13/2023] Open
Abstract
Purpose: The poor bioavailability of drugs in the ocular delivery systems is an important issue and development of delivery systems with prolonged release profile could be in a major importance. This study aims to develop an ocular delivery system using electrospun nanofibers to be a candidate insert for delivery of triamcinolone acetonide. Methods: For this purpose, three different chitosan-based formulations were prepared by electrospinning method, and electrospun nanofibers were compared to a formulation comprising hydrophobic polymers (Eudragit S100 and Zein). The electrospun nanofibers were characterized by SEM and FTIR analyses. The release profile and release kinetic models of all the formulations were also examined. Results: The SEM photographs of electrospun nanofibers revealed that among the four designed formulations, formulation obtained by electrospinning of chitosan and PVP possessed the best quality and the minimum size (120 ±30 nm) , which resulted the most uniform and bead-free nanofibers. This formulation also possessed the prolonged release profile of triamcinolone acetonide and was the only electrospun nanofiber following the zero-order kinetic profile. Due to the small diameter and uniformity of this formulation, the prolonged and well controlled release profile, it could be taken into account as a candidate to overcome the drawbacks of the commonly used ocular delivery systems and be used as ocular insert. Conclusion: This study confirmed the ability of electrospun nanofibers to be used as ocular inserts for delivery of ophthalmic drugs.
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Affiliation(s)
- Shahla Mirzaeei
- Pharmaceutical Sciences Research Center, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran.,Nano Drug Delivery Research Center, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Kaveh Berenjian
- Student Research Committee, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Rasol Khazaei
- Student Research Committee, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran
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Nanogel-based natural polymers as smart carriers for the controlled delivery of Timolol Maleate through the cornea for glaucoma. Int J Biol Macromol 2017; 109:955-962. [PMID: 29154878 DOI: 10.1016/j.ijbiomac.2017.11.090] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 11/10/2017] [Accepted: 11/13/2017] [Indexed: 11/22/2022]
Abstract
Despite frequent scientific efforts, efficient ocular drug delivery is a major challenge for pharmaceutical scientists. Poor bioavailability of ophthalmic solutions can be overcome by using smart ophthalmic drug-delivery systems. In this research, loading and delivery of Timolol Maleate (TM) through the cornea by synthesized nanoparticles based on biopolymers (chitosan-alginate) were studied. The physico-chemical properties of these nanoparticles were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and dynamic light scattering (DLS). Loading and release were evaluated by a UV-vis spectrometer and the ex vivo permeation study was carried out using the Franz Diffusion Cell and fluorescent microscopy studies. The results indicated that morphology and size of nanoparticles were spherical and in the range of 80-100nm. The loading capacity and encapsulation efficiency were about 42% and 94% respectively. They illustrated a burst release in the first hour followed by a slower and more sustained drug release during the next 24h. Also, the results indicated that the cornea penetration of TM loaded in nanoparticles was twice than that of TM. Hence, this nanocarrier can be considered as a suitable candidate for controlled TM delivery and release through the cornea.
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Szigiato AA, Podbielski DW, Ahmed IIK. Sustained drug delivery for the management of glaucoma. EXPERT REVIEW OF OPHTHALMOLOGY 2017. [DOI: 10.1080/17469899.2017.1280393] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | - Dominik W. Podbielski
- Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, ON, Canada
| | - Iqbal Ike K. Ahmed
- Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, ON, Canada
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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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Liu R, Wang S, Sun L, Fang S, Wang J, Huang X, You Z, He X, Liu C. A novel cationic nanostructured lipid carrier for improvement of ocular bioavailability: Design, optimization, in vitro and in vivo evaluation. J Drug Deliv Sci Technol 2016. [DOI: 10.1016/j.jddst.2016.03.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Thermosensitive chitosan-based hydrogel as a topical ocular drug delivery system of latanoprost for glaucoma treatment. Carbohydr Polym 2016; 144:390-9. [DOI: 10.1016/j.carbpol.2016.02.080] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 02/25/2016] [Accepted: 02/29/2016] [Indexed: 12/11/2022]
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25
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De Souza JF, Maia KN, De Oliveira Patrício PS, Fernandes-Cunha GM, Da Silva MG, De Matos Jensen CE, Da Silva GR. Ocular inserts based on chitosan and brimonidine tartrate: Development, characterization and biocompatibility. J Drug Deliv Sci Technol 2016. [DOI: 10.1016/j.jddst.2016.01.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Siafaka PI, Titopoulou A, Koukaras EN, Kostoglou M, Koutris E, Karavas E, Bikiaris DN. Chitosan derivatives as effective nanocarriers for ocular release of timolol drug. Int J Pharm 2015; 495:249-264. [DOI: 10.1016/j.ijpharm.2015.08.100] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 08/29/2015] [Accepted: 08/29/2015] [Indexed: 12/11/2022]
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Liu R, Sun L, Fang S, Wang S, Chen J, Xiao X, Liu C. Thermosensitive in situ nanogel as ophthalmic delivery system of curcumin: development, characterization, in vitro permeation and in vivo pharmacokinetic studies. Pharm Dev Technol 2015; 21:576-82. [DOI: 10.3109/10837450.2015.1026607] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Rui Liu
- School of Traditional Chinese Materia Medica and
| | - Lu Sun
- School of Traditional Chinese Materia Medica and
| | - Shiming Fang
- Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, P.R. China, and
| | - Shuting Wang
- School of Traditional Chinese Materia Medica and
| | | | - Xuefeng Xiao
- School of Traditional Chinese Materia Medica and
| | - Changxiao Liu
- Center for Drug Evaluation Research, Tianjin Institute of Pharmaceutical Research, Tianjin, P.R. China
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Cassani DAD, Altomare L, De Nardo L, Variola F. Physicochemical and nanomechanical investigation of electrodeposited chitosan:PEO blends. J Mater Chem B 2015; 3:2641-2650. [DOI: 10.1039/c4tb02044h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cathodic electrodeposition is a bottom up process that is emerging as a simple yet efficient strategy to engineer thin polymeric films with well-defined physicochemical properties.
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Affiliation(s)
- Davide A. D. Cassani
- Department of Chemistry
- Materials and Chemical Engineering
- “G. Natta”
- Politecnico di Milano
- Milano
| | | | - Luigi De Nardo
- Department of Chemistry
- Materials and Chemical Engineering
- “G. Natta”
- Politecnico di Milano
- Milano
| | - Fabio Variola
- Department of Mechanical Engineering
- University of Ottawa
- Ottawa
- Canada
- Department of Physics
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Wentz SM, Kim NJ, Wang J, Amireskandari A, Siesky B, Harris A. Novel therapies for open-angle glaucoma. F1000PRIME REPORTS 2014; 6:102. [PMID: 25580256 PMCID: PMC4229725 DOI: 10.12703/p6-102] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Open-angle glaucoma is a multifactorial optic neuropathy characterized by progressive loss of retinal ganglion cells and their axons. It is an irreversible disease with no established cure. The only currently approved treatment is aimed at lowering intraocular pressure, the most significant risk factor known to date. However, it is now clear that there are other risk factors involved in glaucoma's pathophysiology. To achieve future improvements in glaucoma management, new approaches to therapies and novel targets must be developed. Such therapies may include new tissue targets for lowering intraocular pressure, molecules influencing ocular hemodynamics, and treatments providing neuroprotection of retinal ganglion cells. Furthermore, novel drug delivery systems are in development that may improve patient compliance, increase bioavailability, and decrease adverse side effects.
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Hermans K, Van den Plas D, Kerimova S, Carleer R, Adriaensens P, Weyenberg W, Ludwig A. Development and characterization of mucoadhesive chitosan films for ophthalmic delivery of cyclosporine A. Int J Pharm 2014; 472:10-9. [DOI: 10.1016/j.ijpharm.2014.06.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 05/21/2014] [Accepted: 06/09/2014] [Indexed: 10/25/2022]
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Jianping Z, Jianfeng G, Yao Z, Jiao Y. Preparation and characterization of cross-linked microspheres C(Dex-g-PSSS) and their drug-carrying and colon-specific drug delivery properties. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2014; 25:1828-41. [DOI: 10.1080/09205063.2014.951246] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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de Oliveira Fulgêncio G, Viana FAB, Silva ROS, Lobato FCF, Ribeiro RR, Fanca JR, Byrro RMD, Faraco AAG, da Silva Cunha-Júnior A. Mucoadhesive chitosan films as a potential ocular delivery system for ofloxacin: preliminaryin vitrostudies. Vet Ophthalmol 2014; 17:150-5. [DOI: 10.1111/vop.12140] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
| | - Fernando Antônio B. Viana
- Ophthalmology Section; School of Veterinary Medicine; Federal University of Minas Gerais; Belo Horizonte Brazil
| | | | | | - Raul R. Ribeiro
- Agricultural Environmental and Biological Sciences; Center of Federal University of Recôncavo of Bahia; Cruz das Almas Brazil
| | - Juçara R. Fanca
- Faculty of Pharmacy; Federal University of Minas Gerais; Belo Horizonte Brazil
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Zarbin MA, Arlow T, Ritch R. Regenerative nanomedicine for vision restoration. Mayo Clin Proc 2013; 88:1480-90. [PMID: 24290123 DOI: 10.1016/j.mayocp.2013.05.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 05/27/2013] [Accepted: 05/30/2013] [Indexed: 11/29/2022]
Abstract
Herein, we discuss recent applications of nanotechnology to ophthalmology, including nanoparticles for drug, gene, and trophic factor delivery; regenerative medicine (in the areas of optogenetics and optic nerve regeneration); and diagnostics (eg, minimally invasive biometric monitoring). Specific applications for the management of choroidal neovascularization, retinal neovascularization, oxidative damage, optic nerve damage, and retinal degenerative disease are considered. Nanotechnology will play an important role in early- and late-stage interventions in the management of blinding diseases.
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Affiliation(s)
- Marco A Zarbin
- Institute of Ophthalmology and Visual Science, New Jersey Medical School, Rutgers University, Newark, NJ.
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Development and characterization of novel polyurethane films impregnated with tolfenamic acid for therapeutic applications. BIOMED RESEARCH INTERNATIONAL 2013; 2013:178973. [PMID: 24073394 PMCID: PMC3773997 DOI: 10.1155/2013/178973] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 07/29/2013] [Indexed: 01/16/2023]
Abstract
The present study deals with the preparation of polyurethane (PU) films impregnated with a nonsteroidal anti-inflammatory drug, tolfenamic acid (TA). Solvent evaporation technique has been employed for the preparation of TA-PU films in two different ratios of 1 : 2 and 1 : 5 in Tetrahydrofuran (THF) or THF-ethanol mixtures. The prepared films were characterized using X-Ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and release studies. The results indicate transformation of crystalline TA to its amorphous form. The degree of crystallinity changes both by increasing the polymer concentration and solvent used for the film preparations. The release profiles of TA were also found to be affected, showing a decrease from approximately 50% to 25% from 1 : 2 to 1 : 5 ratios, respectively.
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