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Kim MJ, Park HS, Kim JW, Lee EY, Rhee M, You YH, Khang G, Park CG, Yoon KH. Suppression of Fibrotic Reactions of Chitosan-Alginate Microcapsules Containing Porcine Islets by Dexamethasone Surface Coating. Endocrinol Metab (Seoul) 2021; 36:146-156. [PMID: 33677936 PMCID: PMC7937851 DOI: 10.3803/enm.2021.879] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 11/03/2020] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND The microencapsulation is an ideal solution to overcome immune rejection without immunosuppressive treatment. Poor biocompatibility and small molecular antigens secreted from encapsulated islets induce fibrosis infiltration. Therefore, the aims of this study were to improve the biocompatibility of microcapsules by dexamethasone coating and to verify its effect after xenogeneic transplantation in a streptozotocin-induced diabetes mice. METHODS Dexamethasone 21-phosphate (Dexa) was dissolved in 1% chitosan and was cross-linked with the alginate microcapsule surface. Insulin secretion and viability assays were performed 14 days after microencapsulation. Dexa-containing chitosan-coated alginate (Dexa-chitosan) or alginate microencapsulated porcine islets were transplanted into diabetic mice. The fibrosis infiltration score was calculated from the harvested microcapsules. The harvested microcapsules were stained with trichrome and for insulin and macrophages. RESULTS No significant differences in glucose-stimulated insulin secretion and islet viability were noted among naked, alginate, and Dexa-chitosan microencapsulated islets. After transplantation of microencapsulated porcine islets, nonfasting blood glucose were normalized in both the Dexa-chitosan and alginate groups until 231 days. The average glucose after transplantation were lower in the Dexa-chitosan group than the alginate group. Pericapsular fibrosis and inflammatory cell infiltration of microcapsules were significantly reduced in Dexa-chitosan compared with alginate microcapsules. Dithizone and insulin were positive in Dexa-chitosan capsules. Although fibrosis and macrophage infiltration was noted on the surface, some alginate microcapsules were stained with insulin. CONCLUSION Dexa coating on microcapsules significantly suppressed the fibrotic reaction on the capsule surface after transplantation of xenogenic islets containing microcapsules without any harmful effects on the function and survival of the islets.
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Affiliation(s)
- Min Jung Kim
- Department of Endocrinology and Metabolism, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Heon-Seok Park
- Department of Endocrinology and Metabolism, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Ji-Won Kim
- Department of Endocrinology and Metabolism, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Eun-Young Lee
- Department of Endocrinology and Metabolism, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Marie Rhee
- Department of Endocrinology and Metabolism, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Young-Hye You
- Department of Endocrinology and Metabolism, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Gilson Khang
- Department of Polymer Nano Science and Technology, Department of BIN Fusion Technology and BK-21 Polymer BIN Fusion Research Team, Chonbuk National University, Jeonju, Korea
| | - Chung-Gyu Park
- Department of Microbiology and Immunology, Translational Xenotransplantation Research Centre, Cancer Research Institute, Biomedical Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Kun-Ho Yoon
- Department of Endocrinology and Metabolism, College of Medicine, The Catholic University of Korea, Seoul, Korea
- Department of Endocrinology and Metabolism, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Shaheen MA, Elmeadawy SH, Bazeed FB, Anees MM, Saleh NM. Innovative coenzyme Q 10-loaded nanoformulation as an adjunct approach for the management of moderate periodontitis: preparation, evaluation, and clinical study. Drug Deliv Transl Res 2020; 10:548-564. [PMID: 31953677 DOI: 10.1007/s13346-019-00698-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Periodontal diseases are worldwide chronic inflammatory conditions that are associated with heavy production of reactive oxygen species followed by damage of the tooth-supporting tissues. Although the mechanical approach of scaling and root planing (SRP) for removing of plaque is considered as the key element for controlling periodontitis, the anatomical complexity of the teeth hinders accessibility to deeper points. The aim of this study was to design a micellar nanocarrier of coenzyme Q10 (Q10) to support the management of moderate periodontitis. Q10 was formulated in nanomicelles (NMQ10) and evaluated regarding encapsulation efficiency, loading efficiency, percent yield, hydrodynamic size (Dh), polydispersity index (PDI), and zeta potential (ζ potential). NMQ10 was incorporated to in situ gelling systems and the in vitro release of Q10 was studied. A clinical study including evaluation of periodontal parameters and biochemical assay of total antioxidant capacity (T-AOC) and lipid peroxide was achieved. Results revealed that Q10 was efficiently entrapped in spherical-shaped stable NMQ10 with Dh, PDI, and ζ potential of 154.0 nm, 0.108, and - 31.67 mV, respectively. The clinical study revealed that SRP only exhibited improvement of the periodontal parameters. Also, assay of T-AOC and lipid peroxide revealed that their values diminished by 21.5 and 23.8%, respectively. On the other hand, SRP combined with local application of NMQ10 resulted in a significant management of the periodontal parameters, and likewise, the assayed biomarkers proved enhanced antioxidant activity over SRP alone. In conclusion, NMQ10 can be suggested as a promising nanosystem as an approach to support the management of chronic periodontitis. Such results could be used to conduct larger clinical studies. Graphical abstrac.
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Affiliation(s)
| | - Samah H Elmeadawy
- Department of Oral Medicine and Periodontology, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Fagr B Bazeed
- Department of Medical Biochemistry, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Mohamed M Anees
- Department of Oral Medicine and Periodontology, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Noha M Saleh
- Department of Pharmaceutics, Faculty of Pharmacy, Mansoura University, Gomhoreyah St., Mansoura, 35516, Egypt.
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Lai WF, Susha AS, Rogach AL, Wang G, Huang M, Hu W, Wong WT. Electrospray-mediated preparation of compositionally homogeneous core–shell hydrogel microspheres for sustained drug release. RSC Adv 2017. [DOI: 10.1039/c7ra07568e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Compositionally homogeneous core–shell hydrogel microspheres were prepared for sustained drug release.
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Affiliation(s)
- Wing-Fu Lai
- School of Pharmaceutical Sciences
- Health Science Centre
- Shenzhen University
- Shenzhen
- China
| | - Andrei S. Susha
- Department of Materials Science and Engineering & Centre for Functional Photonics (CFP)
- City University of Hong Kong
- Hong Kong
| | - Andrey L. Rogach
- Department of Materials Science and Engineering & Centre for Functional Photonics (CFP)
- City University of Hong Kong
- Hong Kong
| | - Guoan Wang
- School of Pharmaceutical Sciences
- Health Science Centre
- Shenzhen University
- Shenzhen
- China
| | - Minjian Huang
- School of Pharmaceutical Sciences
- Health Science Centre
- Shenzhen University
- Shenzhen
- China
| | - Weijie Hu
- School of Pharmaceutical Sciences
- Health Science Centre
- Shenzhen University
- Shenzhen
- China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Hong Kong
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4
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Lai WF, He ZD. Design and fabrication of hydrogel-based nanoparticulate systems for in vivo drug delivery. J Control Release 2016; 243:269-282. [DOI: 10.1016/j.jconrel.2016.10.013] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Revised: 10/12/2016] [Accepted: 10/12/2016] [Indexed: 12/27/2022]
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Formulation, functional evaluation and ex vivo performance of thermoresponsive soluble gels - A platform for therapeutic delivery to mucosal sinus tissue. Eur J Pharm Sci 2016; 96:499-507. [PMID: 27771516 DOI: 10.1016/j.ejps.2016.10.017] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 10/14/2016] [Accepted: 10/17/2016] [Indexed: 11/20/2022]
Abstract
Mucoadhesive in situ gelling systems (soluble gels) have received considerable attention recently as effective stimuli-transforming vectors for a range of drug delivery applications. Considering this fact, the present work involves systematic formulation development, optimization, functional evaluation and ex vivo performance of thermosensitive soluble gels containing dexamethasone 21-phosphate disodium salt (DXN) as the model therapeutic. A series of in situ gel-forming systems comprising the thermoreversible polymer poloxamer-407 (P407), along with hydroxypropyl methyl cellulose (HPMC) and chitosan were first formulated. The optimized soluble gels were evaluated for their potential to promote greater retention at the mucosal surface, for improved therapeutic efficacy, compared to existing solution/suspension-based steroid formulations used clinically. Optimized soluble gels demonstrated a desirable gelation temperature with Newtonian fluid behaviour observed under storage conditions (4-8°C), and pseudoplastic fluid behaviour recorded at nasal cavity/sinus temperature (≈34°C). The in vitro characterization of formulations including rheological evaluation, textural analysis and mucoadhesion studies of the gel form were investigated. Considerable improvement in mechanical properties and mucoadhesion was observed with incorporation of HPMC and chitosan into the gelling systems. The lead poloxamer-based soluble gels, PGHC4 and PGHC7, which were carried through to ex vivo permeation studies displayed extended drug release profiles in conditions mimicking the human nasal cavity, which indicates their suitability for treating a range of conditions affecting the nasal cavity/sinuses.
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Maestrelli F, Bragagni M, Mura P. Advanced formulations for improving therapies with anti-inflammatory or anaesthetic drugs: A review. J Drug Deliv Sci Technol 2016. [DOI: 10.1016/j.jddst.2015.09.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Vashist A, Vashist A, Gupta YK, Ahmad S. Recent advances in hydrogel based drug delivery systems for the human body. J Mater Chem B 2014; 2:147-166. [DOI: 10.1039/c3tb21016b] [Citation(s) in RCA: 320] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Sander C, Madsen KD, Hyrup B, Nielsen HM, Rantanen J, Jacobsen J. Characterization of spray dried bioadhesive metformin microparticles for oromucosal administration. Eur J Pharm Biopharm 2013; 85:682-8. [DOI: 10.1016/j.ejpb.2013.05.017] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 05/29/2013] [Accepted: 05/29/2013] [Indexed: 12/18/2022]
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Rattanakit P, Moulton SE, Santiago KS, Liawruangrath S, Wallace GG. Extrusion printed polymer structures: a facile and versatile approach to tailored drug delivery platforms. Int J Pharm 2011; 422:254-63. [PMID: 22101281 DOI: 10.1016/j.ijpharm.2011.11.007] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Revised: 11/01/2011] [Accepted: 11/03/2011] [Indexed: 12/31/2022]
Abstract
A novel extrusion printing system was used to create drug delivery structures wherein dexamethasone-21-phosphate disodium salt (Dex21P) was encapsulated within a biodegradable polymer (PLGA) and water soluble poly(vinyl alcohol) (PVA) configurations. The ability to control the drug release profile through the spatial distribution of drug within the printed 3-dimensional structures is demonstrated. The fabricated configurations were characterised by optical microscopy and SEM to evaluate surface morphology. The results clearly demonstrate the successful encapsulation of dexamethasone within a laminated PLGA:PVA structure. The resulting drug release profiles from the structures show a two stage release profile with distinctly different release rates and minimal initial burst release observed. Dexamethasone release was monitored over a 4-month period. This approach clearly demonstrates that the extrusion printing technique provides a facile and versatile approach to fabrication of novel drug delivery platforms.
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Affiliation(s)
- Parawee Rattanakit
- Department of Chemistry and Centre for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
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Pignatello R, Basile L, Puglisi G. Chitosan glutamate hydrogels with local anesthetic activity for buccal application. Drug Deliv 2009; 16:176-81. [PMID: 19514978 DOI: 10.1080/10717540902861267] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Hydrogels for the buccal application of the anesthetic drug lidocaine hydrochloride (LDC) were prepared using chitosan glutamate (CHG), a soluble salt of chitosan, or a binary mixture of CHG and glycerin, at different weight ratios. The in vitro drug release was studied at the pH value of saliva to assess the effect of the different formulations on drug delivery. The anesthetic activity of mucoadhesive LDC-CHG hydrogels was assessed in vivo after application on the buccal mucosa, compared to commercial semisolid formulations containing the same drug. LDC-loaded hydrogels can be proposed for the symptom relief of aphthosis or other painful mouth diseases.
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Affiliation(s)
- R Pignatello
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Catania, viale A. Doria, 6, Catania I-95125, Italy.
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