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Binkhathlan Z, Ali R, Alomrani AH, Abul Kalam M, Alshamsan A, Lavasanifar A. Role of Polymeric Micelles in Ocular Drug Delivery: An Overview of Decades of Research. Mol Pharm 2023; 20:5359-5382. [PMID: 37769017 DOI: 10.1021/acs.molpharmaceut.3c00598] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
Local drug delivery to the eye through conventional means has faced many challenges due to three essential barriers: (a) the complex structure of the cornea limiting drug absorption, (b) the capacity of ocular absorptive cells in drug metabolism, and (c) the washing effect of eye tears. Polymeric micelles (PMs) have been the focus of much interest for ocular drug delivery due to several advantages they provide for this application, including the capacity for the solubilization of hydrophobic drugs, nonirritability, nanoscopic diameter, and the clarity of their aqueous solution not interfering with vision. The potential to increase the release and residence time of incorporated medication at the site of absorption is also a bonus advantage for these delivery systems. This Review covers research conducted on single or mixed micelles prepared from small amphiphilic molecules, copolymers (diblock, triblock, and graft), and gel systems containing micelles. The purpose of this review is to provide an update on the status of micellar ocular delivery systems for different indications, with a focus on preclinical and clinical drug development. In this context, we are discussing the anatomy of the eye, various ocular barriers, different micellar formulations, and their benefits in ocular drug delivery, as well as the role of PMs in the management of ocular diseases both in preclinical models and in clinic. The encouraging preclinical effectiveness findings from experiments conducted in both laboratory settings and live animals have paved the way for the advancement of micellar systems in clinical trials for ocular administration and the first nanomicallar formulation approved for clinical use by the United States Food and Drug Administration (marketed as Cequa by Sun Pharmaceuticals).
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Affiliation(s)
- Ziyad Binkhathlan
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
- Nanobiotechnology Research Unit, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Raisuddin Ali
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
- Nanobiotechnology Research Unit, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Abdullah H Alomrani
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
- Nanobiotechnology Research Unit, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Mohd Abul Kalam
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
- Nanobiotechnology Research Unit, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Aws Alshamsan
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
- Nanobiotechnology Research Unit, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Afsaneh Lavasanifar
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta T6G 2H7, Canada
- Department of Chemical and Material Engineering, University of Alberta, Edmonton, Alberta T6G 2 V4, Canada
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Wei D, Pu N, Li SY, Zhao N, Song ZM, Tao Y. Application of Hydrogels in the Device of Ophthalmic Iontophoresis: Theory, Developments and Perspectives. Gels 2023; 9:519. [PMID: 37504398 PMCID: PMC10379725 DOI: 10.3390/gels9070519] [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: 05/30/2023] [Revised: 06/20/2023] [Accepted: 06/22/2023] [Indexed: 07/29/2023] Open
Abstract
The human eye is a consolidated organ with delicate structures and unique immune privileges. Ocular diseases are intractable due to the intrinsic biological barriers within the eyeball. Hydrogels are excellent drug-carrying substances with soft material and excellent properties. They have been extensively used to deliver drugs into ocular tissue via iontophoresis devices. Ophthalmic iontophoresis is an electrochemical technique using tiny electrical currents to deliver drugs into the eye non-invasively. The early infantile iontophoresis technique often required long applying time to achieve therapeutic dose in the posterior ocular segment. The potential limitations in the initial drug concentration and the maximum safe currents would also impede the efficiency and safety of iontophoresis. Moreover, the poor patient compliance always leads to mechanical damage to the cornea and sclera during application. Advantageously, the flexible drug-carrying hydrogel can be in direct contact with the eye during iontophoresis, thereby reducing mechanical damage to the ocular surface. Moreover, the water absorption and adjustable permeability of hydrogels can reduce the electrochemical (EC) reactions and enhance the efficiency of iontophoresis. In this review, we focus on recent developments of hydrogels iontophoresis in ophthalmologic practice. Refinements of the knowledge would provide an outlook for future application of hydrogels in treating ocular disease.
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Affiliation(s)
- Dong Wei
- Henan Eye Institute, Henan Eye Hospital, Henan Provincial People's Hospital (People's Hospital of Zhengzhou University), Zhengzhou 450003, China
- College of Medicine, Zhengzhou University, Zhengzhou 450001, China
| | - Ning Pu
- Henan Eye Institute, Henan Eye Hospital, Henan Provincial People's Hospital (People's Hospital of Zhengzhou University), Zhengzhou 450003, China
- College of Medicine, Zhengzhou University, Zhengzhou 450001, China
| | - Si-Yu Li
- College of Medicine, Zhengzhou University, Zhengzhou 450001, China
| | - Na Zhao
- College of Medicine, Zhengzhou University, Zhengzhou 450001, China
| | - Zong-Ming Song
- Henan Eye Institute, Henan Eye Hospital, Henan Provincial People's Hospital (People's Hospital of Zhengzhou University), Zhengzhou 450003, China
| | - Ye Tao
- Henan Eye Institute, Henan Eye Hospital, Henan Provincial People's Hospital (People's Hospital of Zhengzhou University), Zhengzhou 450003, China
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Dewan M, Adhikari A, Dutta K, Chattopadhyay D. Impact of Poly (Vinyl Alcohol) on The Thermogelation Property and Drug Release Profile of Ophthalmic Formulations Based on Poloxamer 407. ChemistrySelect 2023. [DOI: 10.1002/slct.202203528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- Mitali Dewan
- Department of Polymer Science & Technology University of Calcutta 92 A.P.C. Road Kolkata 700009 India
- Department of Chemistry Shahid Matangini Hazra Govt.General Degree College for Women Chakshrikrishnapur Kulberia, Tamluk, Purba Medinipur West Bengal -721649 India
| | - Arpita Adhikari
- Department of Polymer Science & Technology University of Calcutta 92 A.P.C. Road Kolkata 700009 India
| | - Koushik Dutta
- Department of Polymer Science & Technology University of Calcutta 92 A.P.C. Road Kolkata 700009 India
| | - Dipankar Chattopadhyay
- Department of Polymer Science & Technology University of Calcutta 92 A.P.C. Road Kolkata 700009 India
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Belamkar A, Harris A, Zukerman R, Siesky B, Oddone F, Verticchio Vercellin A, Ciulla TA. Sustained release glaucoma therapies: Novel modalities for overcoming key treatment barriers associated with topical medications. Ann Med 2022; 54:343-358. [PMID: 35076329 PMCID: PMC8794062 DOI: 10.1080/07853890.2021.1955146] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Glaucoma is a progressive optic neuropathy and a leading cause of irreversible blindness. The disease has conventionally been characterized by an elevated intraocular pressure (IOP); however, recent research has built the consensus that glaucoma is not only dependent on IOP but rather represents a multifactorial optic neuropathy. Although many risk factors have been identified ranging from demographics to co-morbidities to ocular structural predispositions, IOP is currently the only modifiable risk factor, most often treated by topical IOP-lowering medications. However, topical hypotensive regimens are prone to non-adherence and are largely inefficient, leading to disease progression in spite of treatment. As a result, several companies are developing sustained release (SR) drug delivery systems as alternatives to topical delivery to potentially overcome these barriers. Currently, Bimatoprost SR (DurystaTM) from Allergan plc is the only FDA-approved SR therapy for POAG. Other SR therapies under investigation include: bimatoprost ocular ring (Allergan) (ClinicalTrials.gov identifier: NCT01915940), iDose® (Glaukos Corporation) (NCT03519386), ENV515 (Envisia Therapeutics) (NCT02371746), OTX-TP (Ocular Therapeutix) (NCT02914509), OTX-TIC (Ocular Therapeutix) (NCT04060144), and latanoprost free acid SR (PolyActiva) (NCT04060758). Additionally, a wide variety of technologies for SR therapeutics are under investigation including ocular surface drug delivery systems such as contact lenses and nanotechnology. While challenges remain for SR drug delivery technology in POAG management, this technology may shift treatment paradigms and dramatically improve outcomes.
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Affiliation(s)
- Aditya Belamkar
- Indiana University School of Medicine, Indianapolis, IN, USA
| | - Alon Harris
- Department of Opthalmology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Ryan Zukerman
- Department of Opthalmology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Department of Opthalmology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Brent Siesky
- Department of Opthalmology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | | | - Thomas A Ciulla
- Indiana University School of Medicine, Indianapolis, IN, USA.,Vitreoretinal Medicine and Surgery, Midwest Eye Institute, Indianapolis, IN, USA
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Batista JVDC, Matos APS, Oliveria AP, Ricci Júnior E, Freitas ZM, Oliveira CA, Toma HK, Capella MAM, Rocha LM, Weissenstein U, Baumgartner S, Holandino C. Thermoresponsive Hydrogel Containing Viscum album Extract for Topic and Transdermal Use: Development, Stability and Cytotoxicity Activity. Pharmaceutics 2021; 14:pharmaceutics14010037. [PMID: 35056932 PMCID: PMC8780802 DOI: 10.3390/pharmaceutics14010037] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/16/2021] [Accepted: 12/21/2021] [Indexed: 02/07/2023] Open
Abstract
Viscum album L. (Santalaceae), also known as European mistletoe, is a semi-parasitic plant that grows on different host trees. Our group recently demonstrated the antitumoral activity of ethanolic V. album extracts in vitro, depending on the dose and the host tree, V. album ssp abietis from Abies alba being the most active extract. The goal of this work focused on the development of a new topical formulation containing V. album extracts, evaluation of in vitro toxicity and ex vivo skin permeation assays. The Poloxamer 407 hydrogel containing 5% of dry (VA_DEH) or aqueous (VA_AEH) extract presented dermal compatible pH and microbiological stability for 180 days. The hydrogels flow curve presented a non-linear relation, characteristic of non-Newtonian fluids, and the mean viscosity for the VA_DEH and VA_AEH was 372.5 ± 7.78 and 331.0 ± 2.83 Pa.s, respectively, being statistically different (Welch’s t test; p < 0.01). Additionally, WST-1 in vitro assays revealed a dose-dependent toxicity for both formulations and VA_DEH presented a higher activity than the VA_AEH. The promising cytotoxic potential of VA_DEH lead to the ex vivo skin permeation assay with 2.73 ± 0.19 µg/cm2 of chlorogenic acid, which permeated at 8 h, showing a transdermal potential. These in vitro results support the idea that VA_DEH is a novel promising candidate for mistletoe therapy. Therefore, further in vivo and pre-clinical experiments should be performed to evaluate the safety and efficacy of this new dermic delivery system.
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Affiliation(s)
- João V. D. C. Batista
- Laboratório Multidisciplinar em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (J.V.D.C.B.); (A.P.O.)
- Hiscia Institute, Society for Cancer Research, 4144 Arlesheim, Switzerland;
| | - Ana Paula S. Matos
- Laboratório de Desenvolvimento Galênico, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (A.P.S.M.); (E.R.J.); (Z.M.F.)
| | - Adriana P. Oliveria
- Laboratório Multidisciplinar em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (J.V.D.C.B.); (A.P.O.)
| | - Eduardo Ricci Júnior
- Laboratório de Desenvolvimento Galênico, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (A.P.S.M.); (E.R.J.); (Z.M.F.)
| | - Zaida M. Freitas
- Laboratório de Desenvolvimento Galênico, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (A.P.S.M.); (E.R.J.); (Z.M.F.)
| | - Catarina A. Oliveira
- Laboratório de Alimentos, Instituto Federal de Educacão, Ciência e Tecnologia do Rio de Janeiro, Rio de Janeiro 20270-021, RJ, Brazil;
| | - Helena K. Toma
- Laboratório de Diagnóstico Molecular e Hematologia, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil;
| | - Marcia A. M. Capella
- LaRBio Carlos Chagas Filho, Biophysics Institute, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil;
| | - Leandro M. Rocha
- Laboratório de Tecnologia de Produtos Naturais, Departamento de Tecnologia Farmacêutica, Universidade Federal Fluminense, Niteroi 24241-000, RJ, Brazil;
| | | | - Stephan Baumgartner
- Hiscia Institute, Society for Cancer Research, 4144 Arlesheim, Switzerland;
- Institute of Complementary and Integrative Medicine, University of Bern, 3012 Bern, Switzerland
- Institute for Integrative Medicine, University of Witten/Herdecke, 58455 Herdecke, Germany
- Correspondence: (S.B.); (C.H.)
| | - Carla Holandino
- Laboratório Multidisciplinar em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (J.V.D.C.B.); (A.P.O.)
- Hiscia Institute, Society for Cancer Research, 4144 Arlesheim, Switzerland;
- Correspondence: (S.B.); (C.H.)
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El Hoffy NM, Abdel Azim EA, Hathout RM, Fouly MA, Elkheshen SA. Glaucoma: Management and Future Perspectives for Nanotechnology-Based Treatment Modalities. Eur J Pharm Sci 2020; 158:105648. [PMID: 33227347 DOI: 10.1016/j.ejps.2020.105648] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/12/2020] [Accepted: 11/13/2020] [Indexed: 12/11/2022]
Abstract
Glaucoma, being asymptomatic for relatively late stage, is recognized as a worldwide cause of irreversible vision loss. The eye is an impervious organ that exhibits natural anatomical and physiological barriers which renders the design of an efficient ocular delivery system a formidable task and challenge scientists to find alternative formulation approaches. In the field of glaucoma treatment, smart delivery systems for targeting have aroused interest in the topical ocular delivery field owing to its potentiality to oppress many treatment challenges associated with many of glaucoma types. The current momentum of nano-pharmaceuticals, in the development of advanced drug delivery systems, hold promises for much improved therapies for glaucoma to reduce its impact on vision loss. In this review, a brief about glaucoma; its etiology, predisposing factors and different treatment modalities has been reviewed. The diverse ocular drug delivery systems currently available or under investigations have been presented. Additionally, future foreseeing of new drug delivery systems that may represent potential means for more efficient glaucoma management are overviewed. Finally, a gab-analysis for the required investigation to pave the road for commercialization of ocular novel-delivery systems based on the nano-technology are discussed.
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Affiliation(s)
- Nada M El Hoffy
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Future University in Egypt
| | - Engy A Abdel Azim
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Future University in Egypt
| | - Rania M Hathout
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | | | - Seham A Elkheshen
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
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Jiang Q, Zhang P, Li J. Elucidation of Colloid Performances of Thermosensitive In Situ–Forming Ophthalmic Gel Formed by Poloxamer 407 for Loading Drugs. J Pharm Sci 2020; 109:1703-1713. [DOI: 10.1016/j.xphs.2020.01.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 12/28/2019] [Accepted: 01/23/2020] [Indexed: 11/29/2022]
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Dewan M, Dutta K, Rana D, Basu A, Bhattacharya A, Adhikary A, Chattopadhyay D. Effect of tamarind seed polysaccharide on thermogelation property and drug release profile of poloxamer 407-based ophthalmic formulation. NEW J CHEM 2020. [DOI: 10.1039/d0nj02767g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, the potential impact of tamarind seed polysaccharide (TSP) on the gelation nature and in vitro release of a particular drug, pilocarpine hydrochloride, from different poloxamer 407-based ophthalmic formulations were evaluated.
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Affiliation(s)
- Mitali Dewan
- Department of Polymer Science & Technology
- University of Calcutta
- Calcutta 700009
- India
- Department of Chemistry
| | - Koushik Dutta
- Department of Polymer Science & Technology
- University of Calcutta
- Calcutta 700009
- India
| | - Dipak Rana
- Department of Chemical and Biological Engineering
- Industrial Membrane Research Institute
- University of Ottawa
- 161 Louis Pasteur St
- Ottawa
| | - Arijita Basu
- Department of Polymer Science & Technology
- University of Calcutta
- Calcutta 700009
- India
| | - Amartya Bhattacharya
- Department of Polymer Science & Technology
- University of Calcutta
- Calcutta 700009
- India
| | - Arghya Adhikary
- Centre for Research in Nanoscience and Nanotechnology, University of Calcutta, JD-2, Sector III
- Salt Lake
- Kolkata 700106
- India
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Abd El Razek AM, Hasan AA, Sabry SA, Mahdy MA, Hamed EE. Metoclopramide hydrochloride thermally sensitive rectal in situ gelling system, a novel out-patient treatment for vomiting in pediatric age. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Song K, Xin M, Yu H, Zheng Z, Li J, Li M, Guo H, Tan Y, Wu X. Novel ultra-small micelles based on rebaudioside A: A potential nanoplatform for ocular drug delivery. Int J Pharm 2018; 552:265-276. [DOI: 10.1016/j.ijpharm.2018.10.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 09/21/2018] [Accepted: 10/03/2018] [Indexed: 12/11/2022]
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Sun H, Huang Y, Zhang L, Li B, Wang X. Co-culture of bone marrow stromal cells and chondrocytes in vivo for the repair of the goat condylar cartilage defects. Exp Ther Med 2018; 16:2969-2977. [PMID: 30214515 PMCID: PMC6125981 DOI: 10.3892/etm.2018.6551] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 05/11/2017] [Indexed: 01/14/2023] Open
Abstract
This study explored the feasibility of inducing the differentiation of BMSCs into chondrocytes through co-culture with chondrocytes in hydrogel constructs (Pluronic F-127 gel) in vivo for the repair of goat mandibular condylar cartilage defects. Chondrocytes and BMSCs were isolated from goat auricular cartilage and bone marrow, respectively, and were mixed at a ratio of 3:7. BMSCs were labelled with green fluorescence protein (GFP) using a retrovirus vector for tracing. Mixed cells were re-suspended in 30% Pluronic F-127 at a concentration of 5×107 cells/ml to form a gel-cell complex. The gel-cell complex was implanted into the temporomandibular joint condylar articular cartilage defects. The whole temporomandibular joint and adjacent tissues were harvested at 4, 8, and 12 weeks after surgery, and gross observation, histology and collagen II expression were evaluated. In the co-culture group, cartilage-like tissues were formed, and abundant type II collagen could be detected by immunohistochemistry in the condylar cartilage defects. Confocal microscopy revealed that implanted GFP-labelled BMSCs were embedded in cartilage-like tissues. The co-culture system described herein provides a chondrogenic microenvironment to induce the chondrogenic differentiation of BMSCs in vivo without any additional cellular factors.
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Affiliation(s)
- Hao Sun
- Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, P.R. China
| | - Yue Huang
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian 350005, P.R. China
| | - Lei Zhang
- Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, P.R. China
| | - Biao Li
- Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, P.R. China
| | - Xudong Wang
- Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, P.R. China
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Codelivery of doxorubicin-containing thermosensitive hydrogels incorporated with docetaxel-loaded mixed micelles enhances local cancer therapy. Colloids Surf B Biointerfaces 2016; 143:260-270. [DOI: 10.1016/j.colsurfb.2016.03.054] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Revised: 03/10/2016] [Accepted: 03/14/2016] [Indexed: 01/09/2023]
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13
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Evaluation of hydrogel composing of Pluronic F127 and carboxymethyl hexanoyl chitosan as injectable scaffold for tissue engineering applications. Colloids Surf B Biointerfaces 2016; 146:204-11. [PMID: 27318966 DOI: 10.1016/j.colsurfb.2016.05.094] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 05/30/2016] [Accepted: 05/31/2016] [Indexed: 12/23/2022]
Abstract
This study demonstrated a novel hydrogel system composing of Pluronic F127, carboxymethyl hexanoyl chitosan (CA) and glutaraldehyde (GA) for encapsulating fibroblasts (L-929). The thermal behavior of the hydrogel was evaluated using TGA, the swelling behavior of the hydrogel was evaluated in Dulbecco's Modified Eagle's medium (DMEM), and the mechanical properties were determined through dynamic mechanical analysis. Cells were encapsulated by simple mixing, and the viability of encapsulated cells was determined using alamar blue cell viability assay and the cells morphology was examined using fluorescent imaging. The results indicated that the Tgel of this system was around 30°C, where sol-gel transformation occurred within 90s. Although the addition of CA and GA reduced the shear moduli slightly, the F127/CA/GA gel was able to remain in gelling state in the medium for more than 1 month. In vitro cell culture study revealed that F-127/CA/GA hydrogels were non-cytotoxic. Moreover, the viability of encapsulated L929 was 106% after incubation for 5 days. Based on these results, these F127/CA/GA hydrogels can be used to encapsulate cells for tissue engineering applications.
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Pragatheeswaran AM, Chen SB. The influence of poly(acrylic acid) on micellization and gelation characteristics of aqueous Pluronic F127 copolymer system. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3757-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Nanomicelle formulation for topical delivery of cyclosporine A into the cornea: in vitro mechanism and in vivo permeation evaluation. Sci Rep 2015. [PMCID: PMC4549686 DOI: 10.1038/srep12968] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A stable topical ophthalmic cyclosporine A (CsA) formulation with good tolerance and high efficacy is still a desire in pharmaceutics and clinics. This article describes the preparation of CsA containing nanomicelles using a polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol (PVCL-PVA-PEG) graft copolymer. Both the polymer itself and the CsA nanomicelles were evaluated for cytotoxicity and ocular irritation. The in vitro uptake and intracellular fate of nanomicelles were characterized. In vivo cornea permeation test performed with 0.5 mg/mL CsA containing nanomicelles, and compared with a commercially available CsA (10 mg/mL) oil-based ophthalmic solution. The CsA nanomicelle ophthalmic solution was simple to prepare and remained storage stable. PVCL-PVA-PEG had no cytotoxicity as its monomer solution, and as its micelle solution (IC50(48 h) = 14.02 mg/mL). CsA nanomicelles also had excellent ocular tolerance in rabbits. The use of nanomicelles significantly improved in vitro cellular uptake, apparently by an energy dependent intracellular endocytosis pathway that involved early endosomes, late endosomes, lysosomes, and ER. In vivo permeation showed that 0.5 mg/mL CsA nanomicelles delivered high levels of CsA into the cornea, when compared to the oil-based 10 mg/mL CsA ophthalmic solution. These findings indicated PVCL-PVA-PEG nanomicelles could be a promising topical delivery system for ocular administration of CsA.
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Kim I, Kim H, Park K, Karki S, Khadka P, Jo K, Kim SY, Ro J, Lee J. Viscoelastic interactions between polydeoxyribonucleotide and ophthalmic excipients. Drug Dev Ind Pharm 2015; 42:231-7. [PMID: 26023993 DOI: 10.3109/03639045.2015.1040417] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study investigated the interaction between polydeoxyribonucleotide (PDRN) and several ionic and nonionic isotonic agents, thickeners and a preservative that were employed as excipients in ophthalmic preparations. Interaction of each individual excipient and PDRN aqueous solution was evaluated by analyzing their rheological properties. Rheological properties of PDRN solutions were evaluated by dynamic oscillatory shear tests and values of elastic modulus (G'), viscous modulus (G″) and loss tangent (tan δ) were used to assess the relative changes in viscoelastic properties. At given concentrations, sodium chloride was found to show alteration in viscoelastic properties of PDRN solution while nonionic isotonic agents like d-glucose and d-sorbitol did not alter them. Similarly, nonionic water soluble polymers like polyvinylpyrrolidone (PVP) and hydroxypropyl methylcellulose (HPMC) also did not interact with PDRN to alter the viscoelastic properties. However, there were changes observed when carbopol 940 was used as a thickener. Therefore, PDRN was found to interact with ionic excipients and the interactions were negligible when nonionic materials were examined, which suggests that nonionic excipients are suitable to be formulated with PDRN.
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Affiliation(s)
- Iksoo Kim
- a Pharmaceutical Formulation Design Laboratory , College of Pharmacy, Chung-Ang University , Seoul , Korea
| | - Hyeongmin Kim
- a Pharmaceutical Formulation Design Laboratory , College of Pharmacy, Chung-Ang University , Seoul , Korea
| | - Kyunghee Park
- a Pharmaceutical Formulation Design Laboratory , College of Pharmacy, Chung-Ang University , Seoul , Korea
| | - Sandeep Karki
- a Pharmaceutical Formulation Design Laboratory , College of Pharmacy, Chung-Ang University , Seoul , Korea
| | - Prakash Khadka
- a Pharmaceutical Formulation Design Laboratory , College of Pharmacy, Chung-Ang University , Seoul , Korea
| | - Kanghee Jo
- a Pharmaceutical Formulation Design Laboratory , College of Pharmacy, Chung-Ang University , Seoul , Korea
| | - Seong Yeon Kim
- a Pharmaceutical Formulation Design Laboratory , College of Pharmacy, Chung-Ang University , Seoul , Korea
| | - Jieun Ro
- a Pharmaceutical Formulation Design Laboratory , College of Pharmacy, Chung-Ang University , Seoul , Korea
| | - Jaehwi Lee
- a Pharmaceutical Formulation Design Laboratory , College of Pharmacy, Chung-Ang University , Seoul , Korea
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Dewan M, Bhowmick B, Sarkar G, Rana D, Bain MK, Bhowmik M, Chattopadhyay D. Effect of methyl cellulose on gelation behavior and drug release from poloxamer based ophthalmic formulations. Int J Biol Macromol 2014; 72:706-10. [PMID: 25256549 DOI: 10.1016/j.ijbiomac.2014.09.021] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 08/27/2014] [Accepted: 09/09/2014] [Indexed: 11/18/2022]
Abstract
The effect of weight average molecular weight (Mw) of methyl cellulose (MC) on the gelation behavior of Poloxamer 407 (PM) and in vitro release of Ketorolac Tromethamine (KT) from different ophthalmic formulations based on PM is examined. A drop of gelation temperature of PM is observed using MC of various M(w) by test tube tilting method, UV-vis spectroscopy, viscometry and rheometry. It is also observed that the viscosity and gel strength of all the formulations are increased with the increase in Mw of MC. PM with highest Mw of MC provides best drug release property among all the formulations. It is evident from this investigation that there is a distinct effect of M(w) of MC on the gelation behavior of PM as well as on the drug release profile of KT from PM-MC based ophthalmic formulations.
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Affiliation(s)
- Mitali Dewan
- Department of Polymer Science and Technology, University College of Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, India
| | - Biplab Bhowmick
- Department of Polymer Science and Technology, University College of Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, India
| | - Gunjan Sarkar
- Department of Polymer Science and Technology, University College of Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, India
| | - Dipak Rana
- Department of Chemical and Biological Engineering, Industrial Membrane Research Institute, University of Ottawa, 161 Louis Pasteur St., Ottawa, ON K1N 6N5, Canada
| | - Mrinal Kanti Bain
- Contai Polytechnic, Directorate of Technical Education & Training, Contai, East Midnapur, West Bengal-721401, India
| | - Manas Bhowmik
- Himalayan Pharmacy Institute, Sikkim University, Majhitar, Rangpo, East Sikkim-737136, India
| | - Dipankar Chattopadhyay
- Department of Polymer Science and Technology, University College of Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, India.
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18
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Micellization and gelation of PEO-PPO-PEO binary mixture with non-identical PPO block lengths in aqueous solution. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.08.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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In situ gelling systems: a strategy to improve the bioavailability of ophthalmic pharmaceutical formulations. Drug Discov Today 2014; 19:400-12. [DOI: 10.1016/j.drudis.2013.10.001] [Citation(s) in RCA: 137] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 08/26/2013] [Accepted: 10/01/2013] [Indexed: 11/24/2022]
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20
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Souza JG, Dias K, Pereira TA, Bernardi DS, Lopez RFV. Topical delivery of ocular therapeutics: carrier systems and physical methods. ACTA ACUST UNITED AC 2013; 66:507-30. [PMID: 24635555 DOI: 10.1111/jphp.12132] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 07/23/2013] [Indexed: 12/17/2022]
Abstract
OBJECTIVE The basic concepts, major mechanisms, technological developments and advantages of the topical application of lipid-based systems (microemulsions, nanoemulsions, liposomes and solid lipid nanoparticles), polymeric systems (hydrogels, contact lenses, polymeric nanoparticles and dendrimers) and physical methods (iontophoresis and sonophoresis) will be reviewed. KEY FINDINGS Although very convenient for patients, topical administration of conventional drug formulations for the treatment of eye diseases requires high drug doses, frequent administration and rarely provides high drug bioavailability. Thus, strategies to improve the efficacy of topical treatments have been extensively investigated. In general, the majority of the successful delivery systems are present on the ocular surface over an extended period of time, and these systems typically improve drug bioavailability in the anterior chamber whereas the physical methods facilitate drug penetration over a very short period of time through ocular barriers, such as the cornea and sclera. SUMMARY Although in the early stages, the combination of these delivery systems with physical methods would appear to be a promising tool to decrease the dose and frequency of administration; thereby, patient compliance and treatment efficacy will be improved.
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Affiliation(s)
- Joel G Souza
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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21
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Lihong W, Xin C, Yongxue G, Yiying B, Gang C. Thermoresponsive ophthalmic poloxamer/tween/carbopolin situgels of a poorly water-soluble drug fluconazole: preparation andin vitro–in vivoevaluation. Drug Dev Ind Pharm 2013; 40:1402-10. [DOI: 10.3109/03639045.2013.828221] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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22
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Pragatheeswaran AM, Chen SB. Effect of chain length of PEO on the gelation and micellization of the pluronic F127 copolymer aqueous system. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:9694-701. [PMID: 23855644 DOI: 10.1021/la401639g] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The effect of adding homopolymer poly(ethylene oxide) (PEO) on the sol/gel behavior of amphiphilic triblock copolymer Pluronic F127 ((EO)98(PO)67(EO)98) in aqueous media is explored. Emphasis is placed on the influence of the PEO molecular weight and concentration on micellization and gelation and the exploration of their correlation. PEO is always found to lower the critical micellization temperature modestly. However, short PEO chains promote the gelation of F127, and long chains delay or even curb gel formation. Micelle size measurements and cryo-TEM micrographs provide evidence for micellar aggregation via the bridging of long PEO chains or depletion flocculation, thereby impeding the ordering of micelles for gel formation.
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23
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Li YY, Li L, Dong HQ, Cai XJ, Ren TB. Pluronic F127 nanomicelles engineered with nuclear localized functionality for targeted drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:2698-707. [DOI: 10.1016/j.msec.2013.02.036] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2012] [Revised: 01/15/2013] [Accepted: 02/19/2013] [Indexed: 11/17/2022]
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24
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Almeida H, Amaral MH, Lobão P, Sousa Lobo JM. Applications of poloxamers in ophthalmic pharmaceutical formulations: an overview. Expert Opin Drug Deliv 2013; 10:1223-37. [DOI: 10.1517/17425247.2013.796360] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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25
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Injected Depot DDS. Biomater Sci 2013. [DOI: 10.1016/b978-0-08-087780-8.00098-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Baek EJ, Shin BK, Nho YC, Lim YM, Park JS, Park JS, Huh KM. Preparation of Poloxamer-based Hydrogels Using Electron Beam and Their Evaluation for Buccal Mucoadhesive Drug Delivery. POLYMER-KOREA 2012. [DOI: 10.7317/pk.2012.36.2.182] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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27
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Thrimawithana T, Rupenthal I, Young S, Alany R. Environment-sensitive polymers for ophthalmic drug delivery. J Drug Deliv Sci Technol 2012. [DOI: 10.1016/s1773-2247(12)50015-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Sutariya V, Miladore N, Geldenhuys W, Bhatia D, Wehrung D, Nakamura H. Thermoreversible gel for delivery of activin receptor-like kinase 5 inhibitor SB-505124 for glaucoma filtration surgery. Pharm Dev Technol 2011; 18:957-62. [PMID: 22206499 DOI: 10.3109/10837450.2011.647035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The purpose of this study is to investigate a thermoreversible gel using Pluronic F-127 to deliver an activin receptor-like kinase 5 (ALK-5) inhibitor SB-505124 in glaucoma filtration surgery (GFS). The gel was characterized for in vitro drug release and viscosity studies. Cytotoxicity of Pluronic F-127 was examined by MTT assay using cultured rabbit subconjunctival fibroblasts. In addition, Pluronic F-127 gel (18% w/v) containing 5 mg of SB-505124 was applied at the surgical site in an in vivo rabbit GFS model. In the in vitro viscosity study, the gel showed a change in viscosity (from 1000 cps to 45,000 cps) from low temperature (10°C) to body temperature (37°C). The in vitro drug release study demonstrated 100% drug release within 12 h. The gel did not show cytotoxicity to the cultured rabbit subconjunctival cells by MTT assay. In the in vivo rabbit GFS model, the drug was successfully delivered by injection and no severe post-surgical complications were observed. A thermoreversible gel system with SB-505124 was successfully prepared and delivered for the rabbit GFS model, and it may provide a novel delivery system in GFS.
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Affiliation(s)
- Vijaykumar Sutariya
- Department of Pharmaceutical Sciences, Northeast Ohio Medical University, Rootstown, OH, USA.
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29
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Nesseem DI. Ophthalmic delivery of sparfloxacin from in situ gel formulation for treatment of experimentally induced bacterial keratitis. Drug Test Anal 2010; 3:106-15. [DOI: 10.1002/dta.170] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2010] [Revised: 07/06/2010] [Accepted: 07/22/2010] [Indexed: 11/08/2022]
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30
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Chen E, Chen J, Cao SL, Zhang QZ, Jiang XG. Preparation of nasal temperature-sensitive in situ gel of Radix Bupleuri and evaluation of the febrile response mechanism. Drug Dev Ind Pharm 2010; 36:490-6. [PMID: 19857161 DOI: 10.3109/03639040903264371] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE This study developed a nasal temperature-sensitive in situ gel system for Radix Bupleuri. METHOD Using 20% Poloxamer 407 as the gel base and 6% PEG 4000 adjusting the gelation temperature. RESULTS The system is liquid at 4 degrees C. It can change its phase to gel above 30 degrees C, which is close to the temperature in nasal cavity. The antipyretic effect produced by Radix Bupleuri in situ gel formulation was investigated in fevered rabbits. The results show that it can prolong the effective time to 24 hours compared with 4-6 hours in Radix Bupleuri intranasal solution. The antipyretic response mechanism was researched by evaluating the relationship between body temperature and concentrations of cyclic adenosine monophosphate in cerebrospinal fluid. The results showed that the two parameters were positively correlated (r = 0.9435, P < 0.05). Six hours later after given in situ gel, the concentrations of cAMP were significantly lower than those in the solution group. It confirmed that temperature-sensitive Radix Bupleuri in situ gel applied in the nasal sprays had a longer residence and release time. CONCLUSION Radix Bupleuri nasal temperature-sensitive in situ gel has a higher medical effect and a longer effective time. Compared to the traditional nasal spray, it is more applicable for the treatment of fever.
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Affiliation(s)
- En Chen
- Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, PR China
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31
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Pepić I, Hafner A, Lovrić J, Pirkić B, Filipović-Grcčić J. A Nonionic Surfactant/Chitosan Micelle System in an Innovative Eye Drop Formulation. J Pharm Sci 2010; 99:4317-25. [DOI: 10.1002/jps.22137] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Derakhshandeh K, Fashi M, Seifoleslami S. Thermosensitive Pluronic hydrogel: prolonged injectable formulation for drug abuse. DRUG DESIGN DEVELOPMENT AND THERAPY 2010; 4:255-62. [PMID: 20957216 PMCID: PMC2948935 DOI: 10.2147/dddt.s13289] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2010] [Indexed: 12/03/2022]
Abstract
Objective: The main objective of this study was to investigate thermosensitive Pluronic® F-127 (PF-127) hydrogel for the modified release of a potent alcohol and opioid antagonist, naltrexone (NTX) hydrochloride, in a subcutaneous injectable dosage form. Methods: The NTX hydrogels were prepared by the cold method, and the in vitro release profiles of various formulations were evaluated at 37°C using the Franz diffusion cell system. We examined the different PF-127 concentrations, pH of solution, and inorganic salts on drug release from these gels. Results: The data showed an increase in PF-127 content from 20% to 35%, resulting in a decrease in the rate of NTX release. Among the formulations prepared in different pH solutions, pH 7.4 produced the slowest drug release rate. The addition of inorganic salts had no significant effect on drug release. However, these factors appeared to have limited effects on drug release rate. Therefore, to achieve a sustained-release formulation, a NTX and triacetyl β-cyclodextrin (TAβCD) complex was evaluated. The binary systems of NTX/TAβCD in different molar ratios were prepared by the kneading method, and complex formation was demonstrated by differential scanning calorimetry. Conclusion: The results of the current in vitro study indicate that PF-127 gel formulations containing drug complexes with hydrophobic cyclodextrin could be useful for the preparation of a controlled delivery system of water-soluble drugs such as NTX, for a period of more than 140 hours.
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Affiliation(s)
- Katayoun Derakhshandeh
- Department of Pharmaceutics, Faculty of Pharmacy, University of Medical Science, Kermanshah, Iran.
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33
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Baloglu E, Karavana SY, Senyigit ZA, Guneri T. Rheological and mechanical properties of poloxamer mixtures as a mucoadhesive gel base. Pharm Dev Technol 2010; 16:627-36. [PMID: 20715905 DOI: 10.3109/10837450.2010.508074] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study described the thermosensitive formulations composed of poloxamer mixtures for use as drug delivery platform via mucosal route. It also characterized the poloxamer mixtures' rheological, mechanical and mucoadhesive properties. Poloxamer (Plx) 407 and Plx 188 were used alone and together for preparing the mucosal drug delivery platform. The mixtures of Plx 407 and Plx 188 in ratio of 15:15 (F5); 15:20 (F6); 20:10 (F7) existed liquid at room temperature, but gelled at physiological temperature. Flow rheometry studies and oscillatory analysis of each formulation were performed at 20 ± 0.1°C and 37 ± 0.1°C. F5 and F7 formulations exhibited typical gel-type mechanical spectra (G' > G″) after the determined frequency value at 37°C whereas F6 behaved as weakly cross-linked gel. Texture profile analysis presented that F5 and F7 showed similar mechanical properties and can be used as base for mucosal dosage form. Mucoadhesion studies indicated the difference among the formulations and the effect of the mucosal surface on mucoadhesive properties. Mucin disc, bovine vaginal and buccal mucosa were used as mucosal platform for mucoadhesion studies. It is suggested that these investigations may be usefully combined to provide a more rational basis for selecting the ratio of Plx to prepare a topical thermosensitive drug delivery system for mucosal administration.
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Affiliation(s)
- Esra Baloglu
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Ege University, Bornova, Izmir, Turkey.
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34
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Solubilization of poorly water-soluble drug carbamezapine in Pluronic® micelles: Effect of molecular characteristics, temperature and added salt on the solubilizing capacity. Colloids Surf B Biointerfaces 2009; 72:141-7. [DOI: 10.1016/j.colsurfb.2009.03.027] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2009] [Revised: 03/24/2009] [Accepted: 03/26/2009] [Indexed: 11/16/2022]
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35
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Mansour M, Mansour S, Mortada ND, Abd ElHady SS. Ocular Poloxamer-Based Ciprofloxacin Hydrochloride In Situ Forming Gels. Drug Dev Ind Pharm 2008; 34:744-52. [DOI: 10.1080/03639040801926030] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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36
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Ma WD, Xu H, Nie SF, Pan WS. Temperature-Responsive, Pluronic-g-poly(acrylic acid) Copolymers In Situ Gels for Ophthalmic Drug Delivery: Rheology, In Vitro Drug Release, and In Vivo Resident Property. Drug Dev Ind Pharm 2008; 34:258-66. [DOI: 10.1080/03639040701580622] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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37
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Determination of poloxamer 188 and poloxamer 407 using high-performance thin-layer chromatography in pharmaceutical formulations. J Pharm Biomed Anal 2008; 46:799-803. [DOI: 10.1016/j.jpba.2007.11.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2007] [Revised: 11/20/2007] [Accepted: 11/21/2007] [Indexed: 11/18/2022]
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38
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Abstract
PURPOSE The use of biopolymers in peribulbar injection for controlled drug delivery provides alternative options to eyedrops and intravitreal or surgical methods. Polymerizable biopolymers are especially likely to have a role because of their particular properties. In liquid form, they can be easily injected into the target site and, after polymerization, they provide a prolonged and controlled release of the drug. This study was undertaken to demonstrate the suitability of a thermopolymerizable biopolymer poloxamer (Lutrol F127) for peribulbar injections and controlled drug release. METHODS The toxicity of injected poloxamer compounds was evaluated by visual inspection and histological and immunohistochemical tissue evaluation. The release of marker substances such as 5(6)-carboxyfluorescein (376 Da) or fluorescein isothiocyanate-dextran (FITC-dextran) (4-40 kDa) from poloxamer was used to simulate drug release and penetration into the eye using in vivo fluorometry. RESULTS According to our clinical and pathological analyses, poloxamer was well tolerated in peribulbar injections and did not cause acute toxicity at the site of injection. The marker compounds were released from the site of injection during the first 24 hours. CONCLUSIONS Although poloxamer appears to be suitable for peribulbar injections, a more prolonged period of dissolution is desirable for clinical purposes.
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Affiliation(s)
- Katja Vehanen
- Department of Ophthalmology, University of Kuopio, Kuopio, Finland.
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39
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Talasaz AHH, Ghahremankhani AA, Moghadam SH, Malekshahi MR, Atyabi F, Dinarvand R. In situ gel forming systems of poloxamer 407 and hydroxypropyl cellulose or hydroxypropyl methyl cellulose mixtures for controlled delivery of vancomycin. J Appl Polym Sci 2008. [DOI: 10.1002/app.28163] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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40
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Ma WD, Xu H, Wang C, Nie SF, Pan WS. Pluronic F127-g-poly(acrylic acid) copolymers as in situ gelling vehicle for ophthalmic drug delivery system. Int J Pharm 2007; 350:247-56. [PMID: 17961940 DOI: 10.1016/j.ijpharm.2007.09.005] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2007] [Revised: 08/25/2007] [Accepted: 09/03/2007] [Indexed: 11/30/2022]
Abstract
To prolong the precorneal resident time and improve ocular bioavailability of the drug, Pluronic F127-g-poly(acrylic acid) copolymers were studied as in situ gelling vehicle for ophthalmic drug delivery system. The rheological properties and in vitro drug release of Pluronic-g-PAA copolymer gels were investigated. The rheogram and in vitro drug release studies indicated that the drug release rates decreased as acrylic acid/Pluronic molar ratio and copolymer solution concentration increased. But the drug concentration had no obvious effect on drug release. The release rates of the drug from such copolymer gels were mainly dependent on the gel dissolution. In vivo resident experiments showed the drug resident time and the total resident amount in rabbit's conjunctiveal sac increased by 5.0 and 2.6 folds for in situ gel, compared with eye drops. The decreased loss angle at body temperature and prolonged precorneal resident time also indicated that the copolymer gels had bioadhesive properties. These in vivo experimental results, along with the rheological properties and in vitro drug release studies, demonstrated that in situ gels containing Pluronic-g-PAA copolymer may significantly prolong the drug resident time and thus improve bioavailability. Pluronic-g-PAA copolymer can be a promising in situ gelling vehicle for ophthalmic drug delivery system.
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Affiliation(s)
- Wen-Di Ma
- Department of Pharmaceutics, Shenyang Pharmaceutical University, Shenyang, Liaoning, PC 110016, People's Republic of China
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41
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Chiappetta DA, Sosnik A. Poly(ethylene oxide)-poly(propylene oxide) block copolymer micelles as drug delivery agents: improved hydrosolubility, stability and bioavailability of drugs. Eur J Pharm Biopharm 2007; 66:303-17. [PMID: 17481869 DOI: 10.1016/j.ejpb.2007.03.022] [Citation(s) in RCA: 410] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2007] [Revised: 03/23/2007] [Accepted: 03/27/2007] [Indexed: 11/24/2022]
Abstract
The low solubility in biological fluids displayed by about 50% of the drugs still remains the main limitation in oral, parenteral, and transdermal administration. Among the existing strategies to overcome these drawbacks, inclusion of hydrophobic drugs into polymeric micelles is one of the most attractive alternatives. Amphiphilic poly(ethylene oxide)-poly(propylene oxide) block copolymers are thermoresponsive materials that display unique aggregation properties in aqueous medium. Due to their ability to form stable micellar systems in water, these materials are broadly studied as hydrosolubilizers for poorly water-soluble drugs. The present review provides a concise description of the most important applications of PEO-PPO-based copolymers in the Pharmaceutical Technology field as means for attaining improved solubility, stability, release, and bioavailability of drugs.
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Affiliation(s)
- Diego A Chiappetta
- Department of Pharmaceutical Technology, Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina
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42
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Dumortier G, Grossiord JL, Agnely F, Chaumeil JC. A review of poloxamer 407 pharmaceutical and pharmacological characteristics. Pharm Res 2006; 23:2709-28. [PMID: 17096184 DOI: 10.1007/s11095-006-9104-4] [Citation(s) in RCA: 797] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2006] [Accepted: 06/27/2006] [Indexed: 12/16/2022]
Abstract
Poloxamer 407 copolymer (ethylene oxide and propylene oxide blocks) shows thermoreversible properties, which is of the utmost interest in optimising drug formulation (fluid state at room temperature facilitating administration and gel state above sol-gel transition temperature at body temperature promoting prolonged release of pharmacological agents). Pharmaceutical evaluation consists in determining the rheological behaviour (flow curve or oscillatory studies), sol-gel transition temperature, in vitro drug release using either synthetic or physiological membrane and (bio)adhesion characteristics. Poloxamer 407 formulations led to enhanced solubilisation of poorly water-soluble drugs and prolonged release profile for many galenic applications (e.g., oral, rectal, topical, ophthalmic, nasal and injectable preparations) but did not clearly show any relevant advantages when used alone. Combination with other excipients like Poloxamer 188 or mucoadhesive polymers promotes Poloxamer 407 action by optimising sol-gel transition temperature or increasing bioadhesive properties. Inclusion of liposomes or micro(nano)particles in Poloxamer 407 formulations offers interesting prospects, as well. Besides these promising data, Poloxamer 407 has been held responsible for lipidic profile alteration and possible renal toxicity, which compromises its development for parenteral applications. In addition, new findings have demonstrated immuno-modulation and cytotoxicity-promoting properties of Poloxamer 407 revealing significant pharmacological interest and, hence, human trials are in progress to specify these potential applications.
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Affiliation(s)
- Gilles Dumortier
- Laboratoire de Galénique, UPRES EA 2498, Faculté des Sciences Pharmaceutiques et Biologiques (Université Paris 5), 4, Avenue de l'Observatoire, 75270, Paris Cedex 06, France.
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Jin L, Wei G, Lu WY, Xu LJ, Pan J. Quantitative Determination of Acyclovir in Aqueous Humor by LC-MS. Chromatographia 2006. [DOI: 10.1365/s10337-006-0732-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Wei G, Ding PT, Zheng JM, Lu WY. Pharmacokinetics of timolol in aqueous humor sampled by microdialysis after topical administration of thermosetting gels. Biomed Chromatogr 2005; 20:67-71. [PMID: 15954162 DOI: 10.1002/bmc.529] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In order to develop a thermosetting gel-based formulation, the ocular pharmacokinetics of timolol was studied utilizing microdialysis sampling technique after topical administration. A linear microdialysis probe was characterized and implanted in the anterior chamber of a rabbit. Dialysate samples collected from the aqueous humor (AH) were directly injected into the HPLC system without any pre-treatment and no interference was observed in the blank sample. The measured in vitro recovery of the probe was 57.67%; however, the in vivo recovery significantly decreased to 16.78% when assessed by the retrodialysis method, which was used to calculate the timolol concentration in AH. Although in the initial 15 min the drug concentrations in AH were comparable to that of the timolol solution, increased Cmax and significantly improved ocular bioavailability were obtained for the gel. When sodium deoxycholate (DC) was incorporated in the gel as a penetration enhancer, a 2-fold increment in the ocular bioavailability was achieved with an increased Cmax and significantly suspended Tmax. The results demonstrated that microdialysis coupled to HPLC is a powerful tool to investigate the ocular pharmacokinetic, and hence facilitates the design of ophthalmic formulations.
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Affiliation(s)
- Gang Wei
- School of Pharmacy, Fudan University, Shanghai 200032, People's Republic of China.
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Pepić I, Jalsenjak N, Jalsenjak I. Micellar solutions of triblock copolymer surfactants with pilocarpine. Int J Pharm 2004; 272:57-64. [PMID: 15019069 DOI: 10.1016/j.ijpharm.2003.11.032] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2003] [Revised: 11/12/2003] [Accepted: 11/25/2003] [Indexed: 10/26/2022]
Abstract
Solutions of surface active triblock copolymer Pluronic F127 in the vicinity of the critical micellar concentration (cmc) were prepared with or without pilocarpine (either as the hydrochloride salt or the free base) in water and phosphate buffer. The characteristics parameters of the surface activity (cmc, Gamma and a) were determined for F127 solutions. Additionally, it was found that the pilocarpine solutions without F127 in water exhibits a certain surface activity. The solutions containing F127 (2 wt.%) well above the cmc and pilocarpine (2 wt.% for the salt, or equimolar 1.7 wt.% for the base) were further tested in vivo (miotic response) on rabbit eye. Though the entrapment efficiency of the drug in the micelles was rather low (maximal 1.9%) the pharmacokinetic parameters (duration of miotic response and the area under miotic curve) were improved when compared to the standard pilocarpine solutions. The best results were obtained for the micellar pilocarpine base solution which exhibits significant prolongation of miotic activity and an increase of AUC for 64%.
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Affiliation(s)
- I Pepić
- Department of Pharmaceutics, Faculty of Pharmacy and Biochemistry, University of Zagreb, A. Kovac?ića 1, Zagreb 10000, Croatia
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Coeshott CM, Smithson SL, Verderber E, Samaniego A, Blonder JM, Rosenthal GJ, Westerink MAJ. Pluronic® F127-based systemic vaccine delivery systems. Vaccine 2004; 22:2396-405. [PMID: 15193401 DOI: 10.1016/j.vaccine.2003.11.064] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2003] [Accepted: 11/13/2003] [Indexed: 10/26/2022]
Abstract
We have developed a vaccine delivery system based on the non-ionic block copolymer, Pluronic F127 (F127), combined with selected immunomodulators. F127-based matrices are characterized by a phenomenon known as reverse thermogelation, whereby the formulation undergoes a phase transition from liquid to gel upon reaching physiological temperatures. Protein antigens (tetanus toxoid (TT), diphtheria toxoid (DT) and anthrax recombinant protective antigen (rPA)) were formulated with F127 in combination with CpG motifs or chitosan, as examples of immunomodulators, and were compared to more traditional adjuvants in mice. IgG antibody responses were significantly enhanced by the F127/CpG and F127/chitosan combinations compared to antigens mixed with CpGs or chitosan alone. In addition, the responses were significantly greater than those elicited by aluminum salts. Furthermore, the functional activity of these antibodies was demonstrated using either in vivo tetanus toxin challenge or an anthrax lethal toxin neutralization assay. These studies suggest that a block-copolymer approach could enhance the delivery of a variety of clinically useful antigens in vaccination schemes.
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Affiliation(s)
- Claire M Coeshott
- RxKinetix Inc., 1172 Century Drive Suite 260, Louisville, CO 80027, USA.
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Robinson SN, Chavez JM, Pisarev VM, Mosley RL, Rosenthal GJ, Blonder JM, Talmadge JE. Delivery of Flt3 ligand (Flt3L) using a poloxamer-based formulation increases biological activity in mice. Bone Marrow Transplant 2003; 31:361-9. [PMID: 12634727 DOI: 10.1038/sj.bmt.1703816] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Fms-like tyrosine kinase (Flt3L) is a potent stimulator of hematopoietic progenitor cell (HPC) expansion and mobilization; however, this requires 7-10 days of administration. We investigated whether sustained delivery of Flt3L using a poloxamer-based matrix (PG) could accelerate and/or improve the hematopoietic activity of Flt3L in mice. A single injection of PG-Flt3L stimulated significantly more rapid and greater HPC mobilization to the spleen and peripheral blood than the daily injection of Flt3L formulated in saline. Pharmacokinetic analysis demonstrated that the formulation of Flt3L in PG prolonged its elimination (Tbeta) half-life (2.3-fold) and increased its bioavailability (>two fold) and the time to maximum serum concentration (T(max)) (2.7-fold). Further, coadministration of G-CSF and PG-Flt3L allowed lower doses of Flt3L to be active, with significantly greater hematopoietic and mobilization activity, compared to the same total dose of G-CSF, Flt3L or G-CSF and Flt3L formulated in saline. These data demonstrate that formulation of Flt3L in PG significantly accelerates and increases HPC expansion and mobilization. The observation of increased bioactivity by PG-Flt3L in rodents suggests the potential for improved clinical efficacy of Flt3L by reducing the time required for HPC mobilization.
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Affiliation(s)
- S N Robinson
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska 68198-6395, USA
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Wei G, Xu H, Ding PT, Li SM, Zheng JM. Thermosetting gels with modulated gelation temperature for ophthalmic use: the rheological and gamma scintigraphic studies. J Control Release 2002; 83:65-74. [PMID: 12220839 DOI: 10.1016/s0168-3659(02)00175-x] [Citation(s) in RCA: 177] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
For ophthalmic drug delivery, Pluronic F127 solutions have a phase transition temperature too low for them to be instilled into the eye at room temperature. Refrigerator storage is usually required to make administration easier, whereas the potential irritation of cold to the sensitive ocular tissues may result in poor topical bioavailability. The purpose of this study is to develop a thermosetting gel with a suitable phase transition temperature by combining Pluronic analogs and to examine the influence of incorporating mucoadhesive polysaccharide, sodium hyaluronate (HA-Na), on the ocular retention of the gel. Dynamic rheological method and single photon emission computing tomography (SPECT) technique were used to ex/in vivo evaluate the thermosetting gels, respectively. An optimized formulation containing 21% F127 and 10% F68 increased the phase transition temperature by 9 degrees C as evaluated by elasticity modulus compared to that of individual 21% F127 solution. Rheological behaviors of the Pluronic solutions showed that the combined Pluronic formulation was free flowing liquid below 25 degrees C and converted to a firm gel under the physiological condition. Furthermore, this formulation possessed the highest viscosity both before and after tear dilution at 35 degrees C. Gamma scintigraphic data demonstrated that the clearance of the thermosetting gel labeled with 99mTc-DTPA was significantly delayed with respect to the phosphate buffered solution, and at least a threefold increase of the corneal residence time was achieved. However, no further improvement in the ocular retention was observed when adding HA-Na into the thermosetting gel due to the substantially decreased gel strength.
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Affiliation(s)
- Gang Wei
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
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Abstract
The ability to inject a drug incorporated into a polymer to a localized site and have the polymer form a semi-solid drug depot has a number of advantages. Among these advantages is ease of application and localized, prolonged drug delivery. For these reasons a large number of in situ setting polymeric delivery systems have been developed and investigated for use in delivering a wide variety of drugs. In this article we introduce the various strategies that have been used to prepare in situ setting systems, and outline their advantages and disadvantages as localized drug delivery systems.
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Affiliation(s)
- A Hatefi
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta T6G 2N8, Canada
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Carmignani C, Rossi S, Saettone MF, Burgalassi S. Ophthalmic vehicles containing polymer-solubilized tropicamide: "in vitro/in vivo" evaluation. Drug Dev Ind Pharm 2002; 28:101-5. [PMID: 11858520 DOI: 10.1081/ddc-120001491] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Commercial 1.0% aqueous tropicamide (TR) eyedrops are buffered to pH 4.4-5.0 to produce sufficiently stable solutions of the weakly basic, poorly soluble drug. These acidic solutions, however, are irritants and may induce copious lachrimation, thus reducing the drug bioavailability. The aim of the present study was to evaluate some solubilizing agents for the preparation of 1.0% TR ophthalmic solutions adjusted at physiologically compatible pH, potentially showing increased eye tolerance, activity, and stability when compared with standard commercial eyedrops. The tested solubilizers were two non-ionic surfactants-Tyloxapol (TY) and Cremophor EL (CR) and one polymer, Pluronic P85 (PL). Four stable 1% TR formulations, containing 3% TY, 7.5% CR, 15% PL, or 5% CR + 10% PL were submitted to mydriatic activity tests in rabbits. They improved to a small but statistically significant extent the AUC for mydriatic effect of TR in the test animals when compared with commercial 1.0% TR eyedrops.
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Affiliation(s)
- C Carmignani
- Department of Bioorganic Chemistry and Biopharmaceutics, University of Pisa, Italy
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