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Annuryanti F, Domínguez-Robles J, Anjani QK, Adrianto MF, Larrañeta E, Thakur RRS. Fabrication and Characterisation of 3D-Printed Triamcinolone Acetonide-Loaded Polycaprolactone-Based Ocular Implants. Pharmaceutics 2023; 15:243. [PMID: 36678872 PMCID: PMC9863928 DOI: 10.3390/pharmaceutics15010243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 12/13/2022] [Accepted: 12/26/2022] [Indexed: 01/13/2023] Open
Abstract
Triamcinolone acetonide (TA) is a corticosteroid that has been used to treat posterior segment eye diseases. TA is injected intravitreally in the management of neovascular disorders; however, frequent intravitreal injections result in many potential side effects and poor patient compliance. In this work, a 3D bioprinter was used to prepare polycaprolactone (PCL) implants loaded with TA. Implants were manufactured with different shapes (filament-, rectangular-, and circle-shaped) and drug loadings (5, 10, and 20%). The characterisation results showed that TA was successfully mixed and incorporated within the PCL matrix without using solvents, and drug content reached almost 100% for all formulations. The drug release data demonstrate that the filament-shaped implants (SA/V ratio~7.3) showed the highest cumulative drug release amongst all implant shapes over 180 days, followed by rectangular- (SA/V ratio~3.7) and circle-shaped implants (SA/V ratio~2.80). Most implant drug release data best fit the Korsmeyer−Peppas model, indicating that diffusion was the prominent release mechanism. Additionally, a biocompatibility study was performed; the results showed >90% cell viability, thus proving that the TA-loaded PCL implants were safe for ocular application.
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Affiliation(s)
- Febri Annuryanti
- Medical Biology Centre, School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
- Faculty of Pharmacy, Airlangga University, Nanizar Zaman Joenoes Building, C Campus, Mulyorejo, Surabaya 60115, Indonesia
| | - Juan Domínguez-Robles
- Medical Biology Centre, School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Qonita Kurnia Anjani
- Medical Biology Centre, School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Muhammad Faris Adrianto
- Medical Biology Centre, School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
- Faculty of Pharmacy, Airlangga University, Nanizar Zaman Joenoes Building, C Campus, Mulyorejo, Surabaya 60115, Indonesia
| | - Eneko Larrañeta
- Medical Biology Centre, School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Raghu Raj Singh Thakur
- Medical Biology Centre, School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
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2
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Amran M, Khafagy ES, Mokhtar HI, Zaitone SA, Moustafa YM, Gad S. Formulation and Evaluation of Novel Additive-Free Spray-Dried Triamcinolone Acetonide Microspheres for Pulmonary Delivery: A Pharmacokinetic Study. Pharmaceutics 2022; 14:2354. [PMID: 36365172 PMCID: PMC9693995 DOI: 10.3390/pharmaceutics14112354] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 10/21/2022] [Accepted: 10/27/2022] [Indexed: 09/29/2023] Open
Abstract
This work aimed to establish a simple method to produce additive-free triamcinolone acetonide (TAA) microspheres suitable for pulmonary delivery, and therefore more simple manufacturing steps will be warranted. The spray-drying process involved the optimization of the TAA feed ratio in a concentration range of 1-3% w/v from different ethanol/water compositions with/without adding ammonium bicarbonate as a blowing agent. Characterization of the formulas was performed via scanning electron microscopy, Fourier-transform infrared spectroscopy, differential scanning calorimetry, and powder X-ray diffraction. Our results indicated that the size and morphology of spray-dried TAA particles were dependent on the feed and solvent concentrations in the spray-dried formulations. Furthermore, adding the blowing agent, ammonium bicarbonate, did not produce a significant enhancement in particle characteristics. We prepared additive-free TAA microspheres and found that TAA formulation #1 had optimal physical properties in terms of diameter (2.24 ± 0.27 µm), bulk density (0.95 ± 0.05), tapped density (1.18 ± 0.07), and flowability for deposition during the pulmonary tract, from a centric airway to the alveoli as indicated by Carr's index = 19 ± 0.01. Hence, formulation #1 was selected to be tested for pharmacokinetic characters. Rats received pulmonary doses of TAA formula #1 and then the TTA concentration in plasma, fluid broncho-alveolar lavage, and lung tissues was determined by HPLC. The TAA concentration at 15 min was 0.55 ± 0.02 µg/mL in plasma, 16.74 ± 2 µg/mL in bronchoalveolar lavage, and 8.96 ± 0.65 µg/mL in lung homogenates, while at the 24 h time point, the TAA concentration was 0.03 ± 0.02 µg/mL in plasma, 1.48 ± 0.27 µg/mL in bronchoalveolar lavage, and 3.79 ± 0.33 µg/mL in lung homogenates. We found that TAA remained in curative concentrations in the rat lung tissues for at least 24 h after pulmonary administration. Therefore, we can conclude that additive-free spray-dried TAA microspheres were promising for treating lung diseases. The current novel preparation technology has applications in the design of preparations for TAA or other therapeutic agents designed for pulmonary delivery.
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Affiliation(s)
- Mohammed Amran
- Department of Pharmacy, Faculty of Medicine and Health Sciences, Thamar University, Thamar 425897, Yemen
- Department of Pharmacy, Al-Manara College for Medical Sciences, Maysan 62001, Iraq
| | - El-Sayed Khafagy
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Hatem I. Mokhtar
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Sinai University, Kantra 41636, Egypt
| | - Sawsan A. Zaitone
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, University of Tabuk, Tabuk 71491, Saudi Arabia
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt
| | - Yasser M. Moustafa
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Badr University in Cairo, Cairo 11829, Egypt
| | - Shadeed Gad
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt
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3
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Hilgeroth PS, Thümmler JF, Binder WH. 3D Printing of Triamcinolone Acetonide in Triblock Copolymers of Styrene–Isobutylene–Styrene as a Slow-Release System. Polymers (Basel) 2022; 14:polym14183742. [PMID: 36145892 PMCID: PMC9504042 DOI: 10.3390/polym14183742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 08/31/2022] [Accepted: 09/01/2022] [Indexed: 11/29/2022] Open
Abstract
Additive manufacturing has a wide range of applications and has opened up new methods of drug formulation, in turn achieving attention in medicine. We prepared styrene–isobutylene–styrene triblock copolymers (SIBS; Mn = 10 kDa–25 kDa, PDI 1,3–1,6) as a drug carrier for triamcinolone acetonide (TA), further processed by fused deposition modeling to create a solid drug release system displaying improved bioavailability and applicability. Living carbocationic polymerization was used to exert control over block length and polymeric architecture. Thermorheological properties of the SIBS polymer (22.3 kDa, 38 wt % S) were adjusted to the printability of SIBS/TA mixtures (1–5% of TA), generating an effective release system effective for more than 60 days. Continuous drug release and morphological investigations were conducted to probe the influence of the 3D printing process on the drug release, enabling 3D printing as a formulation method for a slow-release system of Triamcinolone.
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4
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Kodetova M, Hobzova R, Sirc J, Uhlik J, Dunovska K, Svojgr K, Cocarta AI, Felsoova A, Slanar O, Sima M, Kozak I, Pochop P. The Role of Cryotherapy in Vitreous Concentrations of Topotecan Delivered by Episcleral Hydrogel Implant. Pharmaceutics 2022; 14:pharmaceutics14050903. [PMID: 35631489 PMCID: PMC9144907 DOI: 10.3390/pharmaceutics14050903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/13/2022] [Accepted: 04/18/2022] [Indexed: 01/16/2023] Open
Abstract
Transscleral diffusion delivery of chemotherapy is a promising way to reach the vitreal seeds of retinoblastoma, the most common intraocular malignancy in childhood. In this in vivo study, the delivery of topotecan via lens-shaped, bi-layered hydrogel implants was combined with transconjunctival cryotherapy to assess whether cryotherapy leads to higher concentrations of topotecan in the vitreous. The study included 18 New Zealand albino rabbits; nine rabbits received a topotecan-loaded implant episclerally and another nine rabbits received transconjunctival cryotherapy superotemporally 2 weeks before implant administration. Median vitreous total topotecan exposures (area under the curve, AUC) were 455 ng·h/mL for the cryotherapy group and 281 ng·h/mL for the non-cryotherapy group, and were significantly higher in the cryotherapy group, similar to maximum levels. Median plasma AUC were 50 ng·h/mL and 34 ng·h/mL for the cryotherapy and non-cryotherapy groups, respectively, with no statistically significant differences between them. In both groups, AUC values in the vitreous were significantly higher than in plasma, with plasma exposure at only approximately 11–12% of the level of vitreous exposure. The results confirmed the important role of the choroidal vessels in the pharmacokinetics of topotecan during transscleral administration and showed a positive effect of cryotherapy on intravitreal penetration, resulting in a significantly higher total exposure in the vitreous.
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Affiliation(s)
- Martina Kodetova
- Department of Ophthalmology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, 150 06 Prague, Czech Republic; (M.K.); (P.P.)
| | - Radka Hobzova
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06 Prague, Czech Republic; (R.H.); (A.-I.C.)
| | - Jakub Sirc
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06 Prague, Czech Republic; (R.H.); (A.-I.C.)
- Correspondence:
| | - Jiri Uhlik
- Department of Histology and Embryology, 2nd Faculty of Medicine, Charles University, 150 06 Prague, Czech Republic; (J.U.); (A.F.)
| | - Katerina Dunovska
- Department of Medical Chemistry and Clinical Biochemistry, 2nd Faculty of Medicine, Charles University and Motol University Hospital, 150 06 Prague, Czech Republic;
| | - Karel Svojgr
- Department of Pediatric Hematology and Oncology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, 150 06 Prague, Czech Republic;
| | - Ana-Irina Cocarta
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06 Prague, Czech Republic; (R.H.); (A.-I.C.)
| | - Andrea Felsoova
- Department of Histology and Embryology, 2nd Faculty of Medicine, Charles University, 150 06 Prague, Czech Republic; (J.U.); (A.F.)
- Clinical and Transplant Pathology Centre, Institute for Clinical and Experimental Medicine, 140 21 Prague, Czech Republic
| | - Ondrej Slanar
- Department of Pharmacology, First Faculty of Medicine, Charles University and General University Hospital in Prague, 128 00 Prague, Czech Republic; (O.S.); (M.S.)
| | - Martin Sima
- Department of Pharmacology, First Faculty of Medicine, Charles University and General University Hospital in Prague, 128 00 Prague, Czech Republic; (O.S.); (M.S.)
| | - Igor Kozak
- Moorfields Eye Hospital, Abu Dhabi P.O. Box 62807, United Arab Emirates;
| | - Pavel Pochop
- Department of Ophthalmology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, 150 06 Prague, Czech Republic; (M.K.); (P.P.)
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5
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García-Estrada P, García-Bon MA, López-Naranjo EJ, Basaldúa-Pérez DN, Santos A, Navarro-Partida J. Polymeric Implants for the Treatment of Intraocular Eye Diseases: Trends in Biodegradable and Non-Biodegradable Materials. Pharmaceutics 2021; 13:701. [PMID: 34065798 PMCID: PMC8151640 DOI: 10.3390/pharmaceutics13050701] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/26/2021] [Accepted: 04/28/2021] [Indexed: 12/15/2022] Open
Abstract
Intraocular/Intravitreal implants constitute a relatively new method to treat eye diseases successfully due to the possibility of releasing drugs in a controlled and prolonged way. This particularity has made this kind of method preferred over other methods such as intravitreal injections or eye drops. However, there are some risks and complications associated with the use of eye implants, the body response being the most important. Therefore, material selection is a crucial factor to be considered for patient care since implant acceptance is closely related to the physical and chemical properties of the material from which the device is made. In this regard, there are two major categories of materials used in the development of eye implants: non-biodegradables and biodegradables. Although non-biodegradable implants are able to work as drug reservoirs, their surgical requirements make them uncomfortable and invasive for the patient and may put the eyeball at risk. Therefore, it would be expected that the human body responds better when treated with biodegradable implants due to their inherent nature and fewer surgical concerns. Thus, this review provides a summary and discussion of the most common non-biodegradable and biodegradable materials employed for the development of experimental and commercially available ocular delivery implants.
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Affiliation(s)
- Paulina García-Estrada
- Departamento de Ingenieria de Proyectos-CUCEI, Universidad de Guadalajara, C.P. 45157 Zapopan, Mexico; (P.G.-E.); (M.A.G.-B.); (E.J.L.-N.); (D.N.B.-P.)
| | - Miguel A. García-Bon
- Departamento de Ingenieria de Proyectos-CUCEI, Universidad de Guadalajara, C.P. 45157 Zapopan, Mexico; (P.G.-E.); (M.A.G.-B.); (E.J.L.-N.); (D.N.B.-P.)
| | - Edgar J. López-Naranjo
- Departamento de Ingenieria de Proyectos-CUCEI, Universidad de Guadalajara, C.P. 45157 Zapopan, Mexico; (P.G.-E.); (M.A.G.-B.); (E.J.L.-N.); (D.N.B.-P.)
| | - Dulce N. Basaldúa-Pérez
- Departamento de Ingenieria de Proyectos-CUCEI, Universidad de Guadalajara, C.P. 45157 Zapopan, Mexico; (P.G.-E.); (M.A.G.-B.); (E.J.L.-N.); (D.N.B.-P.)
| | - Arturo Santos
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Campus Guadalajara, C.P. 45138 Zapopan, Mexico;
| | - Jose Navarro-Partida
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Campus Guadalajara, C.P. 45138 Zapopan, Mexico;
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6
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Wu S, Bian C, Li X, Chen M, Yang J, Jin Y, Shen Y, Cheng L. Controlled release of triamcinolone from an episcleral micro film delivery system for open-globe eye injuries and proliferative vitreoretinopathy. J Control Release 2021; 333:76-90. [PMID: 33771623 DOI: 10.1016/j.jconrel.2021.03.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 03/05/2021] [Accepted: 03/16/2021] [Indexed: 11/16/2022]
Abstract
Open globe trauma is the major cause for single eye blindness that stem from subsequent proliferative vitreoretinopathy (PVR). Though biomaterials and tissue engineering have significantly advanced drug delivery and management of human diseases, currently there is no effective drug formulation or device to pharmacologically mitigate PVR formation after open-globe eye trauma. This highlighted the challenge we are facing to bring the technology from bench to bedside. The current study reported an engineered episcleral drug film using biodegradable material, Poly(L-lactide)-co-poly(ɛ-caprolactone), and triamcinolone acetonide (TA) as a model drug. The film can be conveniently sized into any shape to fit the configuration of the eye globe trauma and easily installed onto the ruptured sclera during primary trauma repair surgery. The film allows therapeutic TA to slow release for at least 6 months without toxicity and demonstrated a significant benefit to reduce the odds of developing severe PVR by 5.7 times when compared with a no-drug film control on a rabbit trauma PVR model. Our results suggested this micro episcleral drug film as promising drug delivery carrier for the targeted treatment of various unwanted retinal proliferation diseases.
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Affiliation(s)
- Shaoqun Wu
- School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China
| | - Chengying Bian
- School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China
| | - Xiaoli Li
- School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China
| | - Miao Chen
- School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China
| | - Jie Yang
- School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China
| | - Yuanhui Jin
- School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China
| | - Yu Shen
- School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China
| | - Lingyun Cheng
- School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China.
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7
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Jiang G, Jia H, Qiu J, Mo Z, Wen Y, Zhang Y, Wen Y, Xie Q, Ban J, Lu Z, Chen Y, Wu H, Ni Q, Chen F, Lu J, Wang Z, Li H, Chen J. PLGA Nanoparticle Platform for Trans-Ocular Barrier to Enhance Drug Delivery: A Comparative Study Based on the Application of Oligosaccharides in the Outer Membrane of Carriers. Int J Nanomedicine 2020; 15:9373-9387. [PMID: 33262593 PMCID: PMC7699454 DOI: 10.2147/ijn.s272750] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 09/24/2020] [Indexed: 12/31/2022] Open
Abstract
Purpose The trans-ocular barrier is a key factor limiting the therapeutic efficacy of triamcinolone acetonide. We developed a poly(lactic-co-glycolic acid) nanoparticles (PLGA NPs) surface modified respectively with 2-hydroxypropyl-β-cyclodextrin (2-HP-β-CD), chitosan oligosaccharide and trehalose. Determination of the drug/nanoparticles interactions, characterization of the nanoparticles, in vivo ocular compatibility tests, comparisons of their corneal permeability and their pharmacokinetics in aqueous humor were carried out. Methods All PLGA NPs were prepared by the single emulsion and evaporation method and the drug-nanoparticle interaction was studied. The physiochemical features and in vitro corneal permeability of NPs were characterized while the aqueous humor pharmacokinetics was performed to evaluate in vivo corneal permeability of NPs. Ocular compatibility of NPs was investigated through Draize and histopathological test. Results The PLGA NPs with lactide/glycolide ratio of 50:50 and small particle size (molecular weight 10 kDa) achieved optimal drug release and corneal permeability. Surface modification with different oligosaccharides resulted in uniform particle sizes and similar drug-nanoparticle interactions, although 2-HP-β-CD/PLGA NPs showed the highest entrapment efficiency. In vitro evaluation and aqueous humor pharmacokinetics further revealed that 2-HP-β-CD/PLGA NPs had greater trans-ocular permeation and retention compared to chitosan oligosaccharide/PLGA and trehalose/PLGA NPs. No ocular irritation in vivo was detected after applying modified/unmodified PLGA NPs to rabbit's eyes. Conclusion 2-HP-β-CD/PLGA NPs are a promising nanoplatform for localized ocular drug delivery through topical administration.
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Affiliation(s)
- Ge Jiang
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Huanhuan Jia
- Key Laboratory of Guangdong Laboratory Animals, Guangdong Laboratory Animals Monitoring Institute, Guangzhou, People's Republic of China
| | - Jindi Qiu
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Zhenjie Mo
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yifeng Wen
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yan Zhang
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yuqin Wen
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Qingchun Xie
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Innovation Team for Controlled-Release Microparticle Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Junfeng Ban
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Innovation Team for Controlled-Release Microparticle Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Zhufen Lu
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Innovation Team for Controlled-Release Microparticle Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yanzhong Chen
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Innovation Team for Controlled-Release Microparticle Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Hao Wu
- Community Health Service Center of South China Agricultural University, Guangzhou, People's Republic of China
| | - Qingchun Ni
- Guangzhou General Pharmaceutical Research Institute Co., Ltd, Guangzhou, People's Republic of China
| | - Fohua Chen
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Jiashu Lu
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Zhijiong Wang
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Haoting Li
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Junming Chen
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
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8
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Hao P, Wu X, Wang L, Wei S, Xu H, Huang W, Li Y, Zhang T, Zan X. One-Pot Generating Subunit Vaccine with High Encapsulating Efficiency and Fast Lysosome Escape for Potent Cellular Immune Response. Bioconjug Chem 2020; 31:1917-1927. [PMID: 32639141 DOI: 10.1021/acs.bioconjchem.0c00274] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Utilizing nanoparticles to deliver subunit vaccine is considered to be a promising strategy to improve immune response. However, currently reported systems suffered from one or more points, for example, delicate design on molecular structures and elaborate synthesis process, low antigen and/or adjuvant encapsulation efficiency, involvement of toxic materials, and denaturing of bioactivity of antigen and/or adjuvant. To address these issues, here, for the first time, we developed a one-pot method to produce a subunit vaccine by using hexa-histidine metal assembly (HmA) to codeliver tumor-associated antigens (GP100, a peptide KTWGQYWQV) and adjuvant (CpG). The generation of subunit vaccines was detailedly characterized by various techniques, including dynamic scatter, scanning electron microscopy, transmission electron microscopy, UV-visible spectroscopy, agarose gel electrophoresis, etc. HmA displayed high efficiency on encapsulating both subunits (GP100 and CpG) under mild conditions, and the generated subunit vaccine showed a pH-dependent release profile of loaded subunits. In the cellular tests, these subunit vaccines behaved with a quick endocytosis into immune cells and a fast endo/lysosomes escape, inducing maturation of antigen presentative cells and stimulating a potent cellular immune response. These results suggested that HmA is a robust platform for fabricating subunit vaccine, with immense potential for the immunotherapy of various diseases.
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Affiliation(s)
- Pengyan Hao
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325035, Zhejiang Province, P. R. China
| | - Xiaoxiao Wu
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325035, Zhejiang Province, P. R. China
| | - Liwen Wang
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325035, Zhejiang Province, P. R. China
| | - Shaoyin Wei
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325035, Zhejiang Province, P. R. China
| | - Hongyan Xu
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325035, Zhejiang Province, P. R. China
| | - Wenjuan Huang
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325035, Zhejiang Province, P. R. China
| | - Yana Li
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, P. R. China
| | - Tinghong Zhang
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, P. R. China
| | - Xingjie Zan
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325035, Zhejiang Province, P. R. China.,Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, P. R. China
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9
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Zhang L, Xu H, Wu X, Huang W, Zhang T, Hao P, Peng B, Zan X. A Strategy to Fight against Triple-Negative Breast Cancer: pH-Responsive Hexahistidine-Metal Assemblies with High-Payload Drugs. ACS APPLIED BIO MATERIALS 2020; 3:5331-5341. [PMID: 35021707 DOI: 10.1021/acsabm.0c00653] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Long Zhang
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325035, China
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou325001, China
| | - Hongyan Xu
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325035, China
| | - Xiaoxiao Wu
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325035, China
| | - Wenjuan Huang
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325035, China
| | - Tinghong Zhang
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou325001, China
| | - Pengyan Hao
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325035, China
| | - Bo Peng
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou325001, China
| | - Xingjie Zan
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou 325035, China
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou325001, China
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10
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Depot formulations to sustain periocular drug delivery to the posterior eye segment. Drug Discov Today 2019; 24:1458-1469. [DOI: 10.1016/j.drudis.2019.03.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 01/25/2019] [Accepted: 03/22/2019] [Indexed: 12/27/2022]
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11
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Huang W, Hao P, Qin J, Luo S, Zhang T, Peng B, Chen H, Zan X. Hexahistidine-metal assemblies: A promising drug delivery system. Acta Biomater 2019; 90:441-452. [PMID: 30953803 DOI: 10.1016/j.actbio.2019.03.058] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 03/23/2019] [Accepted: 03/29/2019] [Indexed: 10/27/2022]
Abstract
It is of considerable interest to construct an ideal drug delivery system (i.e., high drug payload, minimal cytotoxicity, rapid endocytosis, and lysosomal escape) under mild conditions for disease treatment, tissue engineering, bioimaging, etc. Inspired by the coordinative interactions between histidine and metal ions, we present the facile synthesis of hexahistidine (His6)-metal assembly (HmA) particles under mild conditions for the first time. The HmA particles presented a high loading capacity, a wide variety of loadable drugs, minimal cytotoxicity, quick internalization, the ability to bypass the lysosomes, and rapid intracellular drug release. In addition, HmA encapsulation largely improved the antitumor ability of camptothecin (CPT) relative to free CPT. By capitalizing on these promising features in drug delivery, HmA will have great potential in various biomedical fields. STATEMENT OF SIGNIFICANCE: It is of considerable interest to construct an ideal drug delivery system (i.e., high drug payload, minimal cytotoxicity, rapid endocytosis, and lysosomal escape) under mild conditions. Inspired by the coordinative interactions between histidine and metal ions, we present for the first time the facile synthesis of Hexahistidine (His6)-metal assembly (HmA) particles under mild conditions. The HmA particles exhibited a high loading capacity, a wide variety of loadable drugs, minimal cytotoxicity, quick internalization, the ability to bypass the lysosomes, and rapid intracellular drug release. By capitalizing on these promising features in drug delivery, HmA will have great potential in various biomedical fields.
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12
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Li X, Ding X, Bian C, Wu S, Chen M, Wang W, Wang J, Cheng L. Hydrophobic drug adsorption loss to syringe filters from a perspective of drug delivery. J Pharmacol Toxicol Methods 2019; 95:79-85. [DOI: 10.1016/j.vascn.2018.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 12/01/2018] [Accepted: 12/03/2018] [Indexed: 01/18/2023]
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13
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Kaji H, Nagai N, Nishizawa M, Abe T. Drug delivery devices for retinal diseases. Adv Drug Deliv Rev 2018; 128:148-157. [PMID: 28690136 DOI: 10.1016/j.addr.2017.07.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 06/29/2017] [Accepted: 07/04/2017] [Indexed: 12/16/2022]
Abstract
Retinal degenerative diseases are a leading cause of irreversible blindness and visual impairment, affecting millions of people worldwide. Although intravitreal injection can directly deliver drugs to the posterior segment of the eye, it is invasive and associated with serious side effects. The design of drug delivery systems targeting the posterior segment of the eye in a less invasive manner has still been challenging because of various anatomical and physiological barriers. In this review, we provide an overview of the current implant device-based approaches used for treating retinal degenerative diseases. We then offer our perspectives on future directions and challenges that remain for developing more effective device-based therapies for retinal diseases.
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Affiliation(s)
- Hirokazu Kaji
- Department of Finemechanics, Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki, Aoba-ku, Sendai 980-8579, Japan.
| | - Nobuhiro Nagai
- Division of Clinical Cell Therapy, United Centers for Advanced Research and Translational Medicine (ART), Tohoku University Graduate School of Medicine, 2-1 Seiryo, Aoba-ku, Sendai 980-8575, Japan
| | - Matsuhiko Nishizawa
- Department of Finemechanics, Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki, Aoba-ku, Sendai 980-8579, Japan
| | - Toshiaki Abe
- Division of Clinical Cell Therapy, United Centers for Advanced Research and Translational Medicine (ART), Tohoku University Graduate School of Medicine, 2-1 Seiryo, Aoba-ku, Sendai 980-8575, Japan
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14
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Huang X, Liu S, Yang Y, Duan Y, Lin D. Controllable continuous sub-tenon drug delivery of dexamethasone disodium phosphate to ocular posterior segment in rabbit. Drug Deliv 2017; 24:452-458. [PMID: 28165816 PMCID: PMC8241022 DOI: 10.1080/10717544.2016.1264498] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Revised: 11/14/2016] [Accepted: 11/21/2016] [Indexed: 12/16/2022] Open
Abstract
Corticosteroids have been used for treatment of posterior segment eye diseases, but the delivery of drug to the posterior segments is still a problem to resolve. In our study, we explore the feasibility of Sub-tenon's Controllable Continuous Drug Delivery to ocular posterior segment. Controllable continuous sub-tenon drug delivery (CCSDD) system, intravenous injections (IV) and sub-conjunctival injections (SC) were used to deliver dexamethasone disodium phosphate (DEXP) in rabbits, the dexamethasone concentration was measured in the ocular posterior segment tissue by Shimadzu LC-MS 2010 system at different time points in 24 h after first dose injection. Levels of dexamethasone were significantly higher at 12, 24 h in CCSDD than two other approaches, and at 3, 6 h in CCSDD than IV in vitreous body (p < 0.01); at 6, 12, 24 h in CCSDD than two other approaches, and at 1, 3 h in CCSDD than IV in retinal/choroidal compound (p < 0.01); at 3, 6, 12, 24 h in CCSDD than two other approaches, and at 1 h in CCSDD than IV in sclera (p < 0.05). The AUC0-24 in CCSDD group is higher than two other groups in all ocular posterior segment tissue. Our results demonstrated that dexamethasone concentration could be sustained moderately higher in the posterior segment by CCSDD than SC and IV, indicating that CCSDD might be a therapeutic alternative to treat a variety of intractable posterior segment diseases.
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Affiliation(s)
- Xuetao Huang
- Department of Ophthalmology, Changsha Aier Hospital, Aier School of Ophthalmology, Central South University, Changsha, China, and
| | - Shaogang Liu
- Advanced Research Center, Central South University, Changsha, China
| | - Yezhen Yang
- Department of Ophthalmology, Changsha Aier Hospital, Aier School of Ophthalmology, Central South University, Changsha, China, and
| | - Yiqin Duan
- Department of Ophthalmology, Changsha Aier Hospital, Aier School of Ophthalmology, Central South University, Changsha, China, and
| | - Ding Lin
- Department of Ophthalmology, Changsha Aier Hospital, Aier School of Ophthalmology, Central South University, Changsha, China, and
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15
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Huang J, Ni Z, Finch P. Gasserian Ganglion and Retrobulbar Nerve Block in the Treatment of Ophthalmic Postherpetic Neuralgia: A Case Report. Pain Pract 2017; 17:961-967. [DOI: 10.1111/papr.12547] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 10/12/2016] [Accepted: 10/19/2016] [Indexed: 01/02/2023]
Affiliation(s)
- Jie Huang
- Department of Physical and Rehabilitation Medicine; Shenyang Medical College; Shenyang China
| | - Zhongge Ni
- Department of Physical and Rehabilitation Medicine; Shenyang Medical College; Shenyang China
- Shenyang Dong-Ao Pain Management Clinic; Shenyang China
| | - Philip Finch
- Perth Pain Management Centre; South Perth Western Australia Australia
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16
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Li J, Lan B, Li X, Sun S, Lu P, Cheng L. Effect of intraocular pressure (IOP) and choroidal circulation on controlled episcleral drug delivery to retina/vitreous. J Control Release 2016; 243:78-85. [DOI: 10.1016/j.jconrel.2016.10.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 09/21/2016] [Accepted: 10/02/2016] [Indexed: 01/24/2023]
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17
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Sun S, Li J, Li X, Lan B, Zhou S, Meng Y, Cheng L. Episcleral drug film for better-targeted ocular drug delivery and controlled release using multilayered poly-ε-caprolactone (PCL). Acta Biomater 2016; 37:143-54. [PMID: 27071973 DOI: 10.1016/j.actbio.2016.04.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Revised: 03/17/2016] [Accepted: 04/08/2016] [Indexed: 11/19/2022]
Abstract
UNLABELLED Triamcinolone acetonide (TA) and poly-ε-caprolactone (PCL) were engineered into a micro drug film for episcleral application to better manage chronic vitreoretinal diseases such as proliferative vitreoretinopathy (PVR). Compared to an intravitreal drug injection, this drug film is much safer without breaking into ocular barriers. Compared to a traditional subtenon injection, this drug film demonstrated superior therapeutic duration, better drug bioavailability in the choroid and retina, and better-targeted drug delivery ability. The rabbit eye study demonstrated that using the PCL-TA film led to 5.6 and 3.4 times higher drug AUC in the choroid and the retina respectively than in eyes following a subtenon drug injection. The mean drug residence time in the rabbit choroid was also doubled by using the episcleral TA film (86days versus 43days). Remaining TA in the drug film was consistently higher than that in the subtenon space, indicating controlled release of TA by the PCL-TA film. The pharmacokinetics of triamcinolone in the choroid and retina were optimized from typical first-order kinetics to a more sustained release by use of this film. This episcleral film system worked better on rabbit eyes than on guinea pig eyes, indicating that scleral thickness and eye size may be crucial aspects to consider when choosing an animal model or when designing a transscleral delivery device for human use. This engineered drug film may be very useful in preventing and managing PVR associated with open globe trauma or surgical repair for retinal detachment. STATEMENT OF SIGNIFICANCE This study demonstrated a novel micro episcleral drug film that is made from the engineering of triamcinolone acetonide (TA) into poly-ε-caprolactone (PCL). The film can be conveniently placed at the injury or disease site during primary surgery and provide controlled release of TA for four months that covers the high-risk time window for developing proliferative vitreoretinopathy (PVR). This engineered drug film may be very useful in preventing and managing PVR associated with open globe trauma or intraocular surgery.
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Affiliation(s)
- Shumao Sun
- Institute of Ocular Pharmacology, School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China; Institute of Brain Science, School of Medicine, Shanxi Datong University, Datong, Shanxi 037009, China
| | - Jie Li
- Institute of Ocular Pharmacology, School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China
| | - Xiaoli Li
- Institute of Ocular Pharmacology, School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China
| | - Bifei Lan
- Institute of Ocular Pharmacology, School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China
| | - Shiyu Zhou
- Institute of Ocular Pharmacology, School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China
| | - Yongchun Meng
- Institute of Ocular Pharmacology, School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China
| | - Lingyun Cheng
- Institute of Ocular Pharmacology, School of Ophthalmology and Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang 325027, China; Jacob's Retina Center at Shiley Eye Center, Department of Ophthalmology, University of California San Diego, 9415 Campus Point Drive, La Jolla, CA 92037-0946, United States.
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18
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Si J, Cui Z, Wang Q, Liu Q, Liu C. Biomimetic composite scaffolds based on mineralization of hydroxyapatite on electrospun poly(ɛ-caprolactone)/nanocellulose fibers. Carbohydr Polym 2016; 143:270-8. [PMID: 27083369 DOI: 10.1016/j.carbpol.2016.02.015] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2015] [Revised: 02/03/2016] [Accepted: 02/04/2016] [Indexed: 11/24/2022]
Abstract
A biomimetic nanocomposite scaffold with HA formation on the electrospun poly(ɛ-caprolactone) (PCL)/nanocellulose (NC) fibrous matrix was developed in this study. The electrospun PCL/NC fiber mat was built and then biomineralized by treatment in simulated body fluid (SBF). Using such a rapid and effective procedure, a continuous biomimetic crystalline HA layer could be successfully formed without the need of any additional chemical modification of the substrate surface. The results showed that the introduction of NC into composite fibers is an effective approach to induce the deposition of HA nucleus as well as to improve their distribution and growth of a crystalline HA layer on the fibrous scaffolds. The water contact angle (WCA) of the PCL/NC/HA scaffolds decreases with increasing NC content and mineralization time, resulting in the enhancement of their hydrophilicity. These results indicated that HA-mineralized on PCL/NC fiber can be prepared directly by simply using SBF immersion.
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Affiliation(s)
- Junhui Si
- School of Materials Science and Engineering, Zhengzhou University, Henan 450001, China; School of Materials Science and Engineering, Fujian University of Technology, Fujian 350118, China
| | - Zhixiang Cui
- School of Materials Science and Engineering, Fujian University of Technology, Fujian 350118, China; National Center for International Research of Micro-nano Molding Technology & Key Laboratory for Micro Molding Technology of Henan Province, Henan 450001, China.
| | - Qianting Wang
- School of Materials Science and Engineering, Fujian University of Technology, Fujian 350118, China
| | - Qiong Liu
- School of Materials Science and Engineering, Fujian University of Technology, Fujian 350118, China
| | - Chuntai Liu
- School of Materials Science and Engineering, Zhengzhou University, Henan 450001, China.
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19
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Lee YK, Choi JK, Kang YJ, Kim HW, Kim SW, Park CK, Khang D, Kim SH. Triamcinolone–carbon nanotube conjugation inhibits inflammation of human arthritis synovial fibroblasts. J Mater Chem B 2016; 4:1660-1671. [DOI: 10.1039/c5tb01693b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Repetitive intra-articular corticosteroid injections are inevitable for treating synovial inflammation in advanced arthritis.
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Affiliation(s)
- Yeon Kyung Lee
- Department of Molecular Medicine
- School of Medicine
- Gachon University
- Incheon 406-840
- South Korea
| | - Jin Kyeong Choi
- CMRI
- Department of Pharmacology
- School of Medicine
- Kyungpook National University
- Daegu 700-422
| | - Youn Joo Kang
- Department of Rehabilitation Medicine
- School of Medicine
- Eulji Hospital
- Eulji University
- Seoul 139-872
| | - Hye Won Kim
- Division of Rheumatology
- School of Medicine
- Eulji Hospital
- Eulji University
- Seoul 139-872
| | - Sang-Woo Kim
- Department of Molecular Medicine
- School of Medicine
- Gachon University
- Incheon 406-840
- South Korea
| | - Chul-Kyu Park
- Department of Physiology
- School of Medicine
- Gachon University
- Incheon 406-840
- South Korea
| | - Dongwoo Khang
- Department of Molecular Medicine
- School of Medicine
- Gachon University
- Incheon 406-840
- South Korea
| | - Sang-Hyun Kim
- CMRI
- Department of Pharmacology
- School of Medicine
- Kyungpook National University
- Daegu 700-422
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20
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Safety and pharmacodynamics of suprachoroidal injection of triamcinolone acetonide as a controlled ocular drug release model. J Control Release 2015; 203:109-17. [PMID: 25700623 DOI: 10.1016/j.jconrel.2015.02.021] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 02/07/2015] [Accepted: 02/15/2015] [Indexed: 11/21/2022]
Abstract
Suprachoroidal injection is an emerging technique for drug delivery to the posterior segment, which is hard to reach by non-invasive approaches. However, the injection technique varies and the associated ocular safety is not well understood. In addition, it is not clear if drug formulation is a major factor in optimizing pharmacodynamics using this technique. The current study was designed to compare the suprachoroidal injection of different drug formulations and to characterize the safety and pharmacodynamics of triamcinolone acetonide (TA) delivered by this technique. Both indocyanine green (ICG) solution and TA suspension, at 50μL, 100μL, and 150μL, were suprachoroidally injected and intraocular pressure (IOP) tonometry, fundus photography, and electroretinography were performed over multiple time points up to eight weeks. After 50μL TA (Kenalog-40) suprachoroidal injection, 4-5 animals at 7 time points were sacrificed for aqueous, vitreous, retina, and plasma collections. TA was quantitated using ultra-performance liquid chromatography tandem mass spectrometry. For comparative efficacy study, 50μL (2mg) suprachoroidal TA versus 20mg subtenon TA were performed 4weeks before induction of experimental uveitis with 10ng of intravitreal lipopolysaccharide. After suprachoroidal injection, IOP had an acute elevation, higher volume caused higher IOP (p<0.0001). Equivalent volume of ICG solution led to a significantly smaller IOP elevation than after TA suprachoroidal injection. This finding suggests better distribution of ICG solution than TA suspension in the suprachoroidal space. Following a 50μL suprachoroidal injection, peak TA concentration in the aqueous was below 1ng/mL. In contrast, the posterior vitreous and retina had 1912ng/mL and 400,369ng/mL TA, respectively. Maximum TA in plasma was 11.6ng/mL. Drug exposure to the posterior retina was 523,910 times more than that to the aqueous and 29,516 times more than systemic TA exposure. In the treatment of lipopolysaccharide-induced uveitis, compared with 20mg subtenon injection, suprachoroidal 2mg TA demonstrated much better efficacy with significantly less aqueous humor cells and lower vitreous opacity scores (p<0.05). Histology showed much less vitreous inflammation in the suprachoroidal injection group (p<0.0001). It seems that a 50μL suprachoroidal injection of TA was well tolerated in rabbit eyes and demonstrated excellent penetration into the posterior retina, providing better therapeutic effect than subtenon 20mg TA.
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