1
|
Sarmout M, Xiao Y, Hu X, Rakhmetova A, Koole LH. A novel approach to achieve semi-sustained drug delivery to the eye through asymmetric loading of soft contact lenses. Heliyon 2023; 9:e16916. [PMID: 37484374 PMCID: PMC10360931 DOI: 10.1016/j.heliyon.2023.e16916] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/31/2023] [Accepted: 06/01/2023] [Indexed: 07/25/2023] Open
Abstract
Soft contact lenses are increasingly being explored as a vehicle for controlled delivery of ophthalmic drugs. However, traditional methods of drug-loading by soaking have limitations such as burst delivery and the release of drugs at the front side of the lens, leading to poor drug efficacy and systemic side effects. This study introduces a new methodology, termed asymmetric drug loading, whereby the ophthalmic drug 'Rebamipide' is attached to and released from the post-lens (=cornea-contacting) surface exclusively. The methodology involves using polymeric microparticles that carry a lipophilic crystalline ophthalmic drug at their surface. These drug-loaded microparticles first transfer the drug to the concave surface of the contact lens, and when worn, the drug is transferred again, now from the lens to the cornea. This is achieved through the diffusion of the drug from one hydrophobic microenvironment (the silicone moieties of the contact lens polymer network) to another hydrophobic microenvironment (the corneal epithelium) over a short pathway. The second drug transfer was observed and studied in experiments using an ex vivo porcine eye model. The results show that the drug amount that was absorbed by the cornea after applying the rebamipide-loaded contact lenses is approximately 3× (10.7 ± 3.1 μg) as much as the amount of rebamipide that gets transferred after the instillation of one eye drop (1% solution (p < 0.001). The new drug-loading method offers a practical and reproducible means of delivering ophthalmic drugs to the cornea through soft contact lenses. The drug payloads achieved are comparable to dosages used during eye drop therapy.
Collapse
Affiliation(s)
| | | | | | | | - Leo H. Koole
- Corresponding author. The Eye Hospital of Wenzhou Medical University, School of Ophthalmology & Optometry, School of Biomedical Engineering, 270 Xueyuan Road, Wenzhou, Zhejiang, 325027, China.
| |
Collapse
|
2
|
Karina A, Benzina A, Tazhibayeva S, Fan H, Koole LH. Polymer microparticles with a cavity designed for transarterial chemo-embolization with crystalline drug formulations. J Biomed Mater Res B Appl Biomater 2020; 109:401-409. [PMID: 32860336 DOI: 10.1002/jbm.b.34708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 07/29/2020] [Accepted: 08/04/2020] [Indexed: 11/05/2022]
Abstract
Transarterial chemo-embolization with drug-eluting embolic beads (DEB-TACE) is still evolving. Recent developments include the introduction of radiopaque (X-ray imageable) drug-eluting particles. Here, we report on conceptually different radiopaque polymeric drug-eluting embolic particles, which are (i), cross-linked poly(methacrylates); (ii), radiopaque; (iii), microporous. Furthermore, the particles are not perfectly spherical: they have a large indentation in the sense that they are either a spherical/cup-shaped or ellipsoid/mouth-shaped. The micropores and the large indentation can confer useful features upon the particles, since they can be filled with a crystalline lipophilic chemotherapeutic drug. It is important, in this respect that (i), many potent chemotherapeutics are lipophilic and crystalline; (ii), available drug-eluting beads (DEBs) have the limitation that they can only be used in combination with water-soluble chemotherapeutic agents. Cup- and mouth-shaped particles were obtained in a Cu(0) catalyzed free-radical polymerization reaction. The microparticles could be charged with crystalline drug, in such a manner that the crystals reside in both the micropores and the large cavity, and in quantities that would be required for effective local chemotherapy. The antifungal drug voriconazole, lipophilic, and crystalline, was used to demonstrate this. We believe that the ability of the microporous/cavitated DEBs to carry lipophilic chemotherapeutic drugs is especially important. DEB-TACE is likely to become a cornerstone method of interventional oncology in the years ahead, and the new embolic particles described herein hold the promise of becoming scope widening for the technique.
Collapse
Affiliation(s)
- Aigerim Karina
- Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, Kazakhstan
| | - Abderazak Benzina
- Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, Kazakhstan
| | - Samal Tazhibayeva
- Department of Biology, School of Science and Humanities, Nazarbayev University, Nur-Sultan, Kazakhstan
| | - Haiyan Fan
- Department of Chemistry, School of Science and Humanities, Nazarbayev University, Nur-Sultan, Kazakhstan
| | - Levinus H Koole
- Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, Kazakhstan
| |
Collapse
|
3
|
Sang L, Luo D, Wei Z, Qi M. X-ray visible and doxorubicin-loaded beads based on inherently radiopaque poly(lactic acid)-polyurethane for chemoembolization therapy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:1389-1398. [PMID: 28415430 DOI: 10.1016/j.msec.2017.03.069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 03/03/2017] [Accepted: 03/10/2017] [Indexed: 12/19/2022]
Abstract
The aim of current study was to develop drug-loaded polymeric beads with intrinsic X-ray visibility as embolic agents, targeting for noninvasive intraoperative location and postoperative examination during chemoembolization therapy. To endow polymer with inherent radiopacity, 4,4'-isopropylidinedi-(2,6-diiodophenol) (IBPA) was firstly synthesized and employed as a contrast agent, and then a set of radiopaque iodinated poly(lactic acid)-polyurethanes (I-PLAUs) via chain extender method were synthesized and characterized. These I-PLAU copolymers possessed sufficient radiopacity, in vitro non-cytotoxicity with human adipose-derived stem cells, and in vivo biocompatibility and degradability in rabbit model via intramuscular implantation. Doxorubicin (DOX), as a chemotherapeutic agent, was further incorporated into I-PLAU beads via a double emulsification (W/O/W) method. For drug release, two ratios of DOX-loaded I-PLAU beads exhibited calibrated size (200-550μm), porous internal structure, good X-ray visibility, evenly drug loading as well as tunable drug release. A preliminary test on in vitro tumor cell toxicity demonstrated that the DOX-loaded I-PLAU beads performed efficient anti-tumor effect. This study highlights novel X-ray visible drug-loaded I-PLAU beads used as promising embolic agents for non-invasive in situ X-ray tracking and efficient chemotherapy, which could bring opportunities to the next generation of multifunctional embolic agents.
Collapse
Affiliation(s)
- Lin Sang
- School of Automotive Engineering, Dalian University of Technology, Dalian 116024, China
| | - Dongdong Luo
- Department of Endocrinology, Second Affiliated Hospital of Dalian Medical University, Dalian 116023, China
| | - Zhiyong Wei
- Department of Polymer Science and Materials, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
| | - Min Qi
- School of Material Science and Engineering, Dalian University of Technology, Dalian 116024, China
| |
Collapse
|
4
|
Kiran S, Sunny MC, Joseph R. Inherently X-ray opaque polyurethane microspheres for biomedical applications. INT J POLYM MATER PO 2016. [DOI: 10.1080/00914037.2016.1201764] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- S. Kiran
- Division of Polymeric Medical Devices, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| | - M. C. Sunny
- Division of Polymeric Medical Devices, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| | - Roy Joseph
- Division of Polymeric Medical Devices, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| |
Collapse
|
5
|
Kiran S, Joseph R. Synthesis and characterization of X-ray opaque polycarbonate urethane: Effect of a dihalogenated chain extender on radiopacity and hemocompatibility. J Biomed Mater Res A 2014; 103:2214-24. [DOI: 10.1002/jbm.a.35359] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 10/14/2014] [Indexed: 12/21/2022]
Affiliation(s)
- S. Kiran
- Polymer Processing Laboratory; Biomedical Technology Wing; Sree Chitra Tirunal Institute for Medical Sciences and Technology; Trivandrum 695012 Kerala India
| | - Roy Joseph
- Polymer Processing Laboratory; Biomedical Technology Wing; Sree Chitra Tirunal Institute for Medical Sciences and Technology; Trivandrum 695012 Kerala India
| |
Collapse
|
6
|
Ma Y, Wan J, Qian K, Geng S, He N, Zhou G, Zhao Y, Yang X. The studies on highly concentrated complex dispersions of gold nanoparticles and temperature-sensitive nanogels and their application as new blood-vessel-embolic materials with high-resolution angiography. J Mater Chem B 2014; 2:6044-6053. [DOI: 10.1039/c4tb00748d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
High colloid stability of highly concentrated Au nanoparticles (GNPs) for use in blood-pool imaging was achieved, using p(N-isopropylacrylamide-co-butyl methylacrylate) nanogels.
Collapse
Affiliation(s)
- Yingying Ma
- National Engineering Research Center for Nanomedicine
- Huazhong University of Science and Technology
- Wuhan, P. R. China
| | - Jiangshan Wan
- National Engineering Research Center for Nanomedicine
- Huazhong University of Science and Technology
- Wuhan, P. R. China
| | - Kun Qian
- Interventional Radiology Department of Wuhan Union Hospital
- Huazhong University of Science and Technology
- Wuhan, P. R. China
| | - Shinan Geng
- National Engineering Research Center for Nanomedicine
- Huazhong University of Science and Technology
- Wuhan, P. R. China
| | - Nijun He
- National Engineering Research Center for Nanomedicine
- Huazhong University of Science and Technology
- Wuhan, P. R. China
| | - Guofeng Zhou
- Interventional Radiology Department of Wuhan Union Hospital
- Huazhong University of Science and Technology
- Wuhan, P. R. China
| | - Yanbing Zhao
- National Engineering Research Center for Nanomedicine
- Huazhong University of Science and Technology
- Wuhan, P. R. China
| | - Xiangliang Yang
- National Engineering Research Center for Nanomedicine
- Huazhong University of Science and Technology
- Wuhan, P. R. China
| |
Collapse
|
7
|
Kiran S, Joseph R. Synthesis and characterization of a noncytotoxic, X-ray opaque polyurethane containing iodinated hydroquinone bis(2-hydroxyethyl) ether as chain extender for biomedical applications. J Biomed Mater Res A 2013; 102:3207-15. [DOI: 10.1002/jbm.a.34997] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Accepted: 10/09/2013] [Indexed: 11/10/2022]
Affiliation(s)
- S. Kiran
- Polymer Processing Laboratory; Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology; Trivandrum 695012 Kerala India
| | - Roy Joseph
- Polymer Processing Laboratory; Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology; Trivandrum 695012 Kerala India
| |
Collapse
|
8
|
Browne S, Fontana G, Rodriguez BJ, Pandit A. A Protective Extracellular Matrix-Based Gene Delivery Reservoir Fabricated by Electrostatic Charge Manipulation. Mol Pharm 2012; 9:3099-106. [DOI: 10.1021/mp300231d] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shane Browne
- Network of Excellence for Functional
Biomaterials (NFB), National University of Ireland, Galway, Ireland
| | - Gianluca Fontana
- Network of Excellence for Functional
Biomaterials (NFB), National University of Ireland, Galway, Ireland
| | - Brian J. Rodriguez
- Conway
Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
| | - Abhay Pandit
- Network of Excellence for Functional
Biomaterials (NFB), National University of Ireland, Galway, Ireland
| |
Collapse
|
9
|
Kiran S, James NR, Jayakrishnan A, Joseph R. Polyurethane thermoplastic elastomers with inherent radiopacity for biomedical applications. J Biomed Mater Res A 2012; 100:3472-9. [DOI: 10.1002/jbm.a.34295] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Accepted: 05/17/2012] [Indexed: 11/10/2022]
Affiliation(s)
- S. Kiran
- Polymer Processing Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Satelmond Palace Campus, Trivandrum 695 012, Kerala, India
| | - Nirmala R. James
- Indian Institute of Space Sciences and Technology, Trivandrum 695 022, Kerala, India
| | - A. Jayakrishnan
- Department of Biotechnology, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Roy Joseph
- Polymer Processing Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Satelmond Palace Campus, Trivandrum 695 012, Kerala, India
| |
Collapse
|
10
|
SOX9 gene plus heparinized TGF-β 3 coated dexamethasone loaded PLGA microspheres for inducement of chondrogenesis of hMSCs. Biomaterials 2012; 33:7151-63. [PMID: 22795539 DOI: 10.1016/j.biomaterials.2012.06.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 06/15/2012] [Indexed: 11/20/2022]
Abstract
Microparticulated types of scaffolds have been widely applied in stem cell therapy and the tissue engineering field for the regeneration of wound tissues. During application of simple genes or growth factors and cell delivery vehicles, we designed a method that employs dexamethsone loaded PLGA microspheres consisting of polyplexed SOX9 genes plus heparinized TGF-β 3 on the surface of polymeric microspheres prepared using a layer-by-layer (LbL) method. The fabrication of the polyplexed SOX9 genes plus heparinized TGF-β 3 and their subsequent coating onto dexamethsone loaded PLGA microspheres represents a method for functionalization of the polymeric matrix. The use of SOX9 gene plus heparinized TGF-β 3 coated dexamethsone loaded PLGA microspheres was evaluated to determine their potential as both gene carriers and cell delivery vehicle. By adhesion of hMSCs onto SOX9 gene plus heparinized TGF-β 3 coated dexamethsone loaded PLGA microspheres, the chondrogenesis-related specific genes of collagen type II were increased 30 times comparing to control. Also, the specific extracellular matrix of glycosaminoglycan (GAG) production of hMSCs adhered onto SOX9 gene plus heparinized TGF-β 3 coated dexamethasone loaded PLGA microspheres increased more 2.5 times than control group. Not only in vitro culture but in vivo results, the specific genes of COMP, aggrecan, collagen type II, and SOX9 showed much more gene expressions such as 20, 15, 10, 8 times.
Collapse
|
11
|
Natarajan V, Saravanakumar P, Madhan B. Collagen adsorption on quercetin loaded polycaprolactone microspheres: Approach for “stealth” implant. Int J Biol Macromol 2012; 50:1091-4. [DOI: 10.1016/j.ijbiomac.2012.03.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Revised: 03/01/2012] [Accepted: 03/06/2012] [Indexed: 12/30/2022]
|