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Meissner S, Rees S, Nguyen L, Connor B, Barker D, Harland B, Raos B, Svirskis D. Encapsulation of the growth factor neurotrophin-3 in heparinised poloxamer hydrogel stabilises bioactivity and provides sustained release. BIOMATERIALS ADVANCES 2024; 159:213837. [PMID: 38522310 DOI: 10.1016/j.bioadv.2024.213837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/03/2024] [Accepted: 03/19/2024] [Indexed: 03/26/2024]
Abstract
Poloxamer-based hydrogels show promise to stabilise and sustain the delivery of growth factors in tissue engineering applications, such as following spinal cord injury. Typically, growth factors such as neurotrophin-3 (NT-3) degrade rapidly in solution. Similarly, poloxamer hydrogels also degrade readily and are, therefore, only capable of sustaining the release of a payload over a small number of days. In this study, we focused on optimising a hydrogel formulation, incorporating both poloxamer 188 and 407, for the sustained delivery of bioactive NT-3. Hyaluronic acid blended into the hydrogels significantly reduced the degradation of the gel. We identified an optimal hydrogel composition consisting of 20 % w/w poloxamer 407, 5 % w/w poloxamer 188, 0.6 % w/w NaCl, and 1.5 % w/w hyaluronic acid. Heparin was chemically bound to the poloxamer chains to enhance interactions between the hydrogel and the growth factor. The unmodified and heparin-modified hydrogels exhibited sustained release of NT-3 for 28 days while preserving the bioactivity of NT-3. Moreover, these hydrogels demonstrated excellent cytocompatibility and had properties suitable for injection into the intrathecal space, underscoring their suitability as a growth factor delivery system. The findings presented here contribute valuable insights to the development of effective delivery strategies for therapeutic growth factors for tissue engineering approaches, including the treatment of spinal cord injury.
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Affiliation(s)
- Svenja Meissner
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Grafton, Auckland 1023, New Zealand
| | - Shaun Rees
- School of Chemical Sciences, University of Auckland, Auckland 1010, New Zealand
| | - Linh Nguyen
- Department of Pharmacology & Clinical Pharmacology, Centre of Brain Research, School of Medical Science, Faculty of Medical and Health Sciences, University of Auckland, Grafton, Auckland 1023, New Zealand
| | - Bronwen Connor
- Department of Pharmacology & Clinical Pharmacology, Centre of Brain Research, School of Medical Science, Faculty of Medical and Health Sciences, University of Auckland, Grafton, Auckland 1023, New Zealand
| | - David Barker
- School of Chemical Sciences, University of Auckland, Auckland 1010, New Zealand
| | - Bruce Harland
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Grafton, Auckland 1023, New Zealand
| | - Brad Raos
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Grafton, Auckland 1023, New Zealand
| | - Darren Svirskis
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Grafton, Auckland 1023, New Zealand.
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2
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Andrews GP, Laverty T, Jones DS. Mucoadhesive Polymeric Polyologels Designed for the Treatment of Periodontal and Related Diseases of the Oral Cavity. Polymers (Basel) 2024; 16:589. [PMID: 38475273 DOI: 10.3390/polym16050589] [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: 12/31/2023] [Revised: 02/03/2024] [Accepted: 02/12/2024] [Indexed: 03/14/2024] Open
Abstract
The study objective was to design and characterise herein unreported polyologels composed of a range of diol and triol solvents and polyvinyl methyl ether-co-maleic acid (PVM/MA) and, determine their potential suitability for the treatment of periodontal and related diseases in the oral cavity using suitable in vitro methodologies. Polyologel flow and viscoelastic properties were controlled by the choice of solvent and the concentration of polymer. At equivalent polymer concentrations, polyologels prepared with glycerol (a triol) exhibited the greatest elasticity and resistance to deformation. Within the diol solvents (PEG 400, pentane 1,5-diol, propane 1,2-diol, propane 1,3-diol, and ethylene glycol), PEG 400 polyologels possessed the greatest elasticity and resistance to deformation, suggesting the importance of distance of separation between the diol groups. Using Raman spectroscopy bond formation between the polymer carbonyl group and the diol hydroxyl groups was observed. Polyologel mucoadhesion was influenced by viscoelasticity; maximum mucoadhesion was shown by glycerol polyologels at the highest polymer concentration (20% w/w). Similarly, the choice of solvent and concentration of PVM/MA affected the release of tetracycline from the polyologels. The controlled release of tetracycline for at least 10 h was observed for several polyologels, which, in combination with their excellent mucoadhesion and flow properties, offer possibilities for the clinical use of these systems to treat diseases within the oral cavity.
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Affiliation(s)
- Gavin P Andrews
- School of Pharmacy, Queen's University of Belfast, 97, Lisburn Road, Belfast BT9 7BL, UK
| | - Thomas Laverty
- School of Pharmacy, Queen's University of Belfast, 97, Lisburn Road, Belfast BT9 7BL, UK
| | - David S Jones
- School of Pharmacy, Queen's University of Belfast, 97, Lisburn Road, Belfast BT9 7BL, UK
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3
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Bhujel B, Yang SS, Kim HR, Kim SB, Min BH, Choi BH, Han I. An Injectable Engineered Cartilage Gel Improves Intervertebral Disc Repair in a Rat Nucleotomy Model. Int J Mol Sci 2023; 24:3146. [PMID: 36834559 PMCID: PMC9966384 DOI: 10.3390/ijms24043146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/19/2023] [Accepted: 02/03/2023] [Indexed: 02/09/2023] Open
Abstract
Lower back pain is a major problem caused by intervertebral disc degeneration. A common surgical procedure is lumbar partial discectomy (excision of the herniated disc causing nerve root compression), which results in further disc degeneration, severe lower back pain, and disability after discectomy. Thus, the development of disc regenerative therapies for patients who require lumbar partial discectomy is crucial. Here, we investigated the effectiveness of an engineered cartilage gel utilizing human fetal cartilage-derived progenitor cells (hFCPCs) on intervertebral disc repair in a rat tail nucleotomy model. Eight-week-old female Sprague-Dawley rats were randomized into three groups to undergo intradiscal injection of (1) cartilage gel, (2) hFCPCs, or (3) decellularized extracellular matrix (ECM) (n = 10/each group). The treatment materials were injected immediately after nucleotomy of the coccygeal discs. The coccygeal discs were removed six weeks after implantation for radiologic and histological analysis. Implantation of the cartilage gel promoted degenerative disc repair compared to hFCPCs or hFCPC-derived ECM by increasing the cellularity and matrix integrity, promoting reconstruction of nucleus pulposus, restoring disc hydration, and downregulating inflammatory cytokines and pain. Our results demonstrate that cartilage gel has higher therapeutic potential than its cellular or ECM component alone, and support further translation to large animal models and human subjects.
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Affiliation(s)
- Basanta Bhujel
- Department of Biomedical Science, College of Life Sciences, CHA University, Seongnam 13496, Republic of Korea
| | | | | | - Sung Bum Kim
- Department of Neurosurgery, Kyung Hee University, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Byoung-Hyun Min
- ATEMs Inc., Seoul 02447, Republic of Korea
- Wake Forest Institute of Regenerative Medicine, School of Medicine, Wake Forest University, Winston Salem, NC 27101, USA
| | - Byung Hyune Choi
- ATEMs Inc., Seoul 02447, Republic of Korea
- Department of Biomedical Sciences, Inha University College of Medicine, Incheon 22212, Republic of Korea
| | - Inbo Han
- Department of Neurosurgery, CHA Bundang Medical Center, School of Medicine, CHA University, Seongnam 13496, Republic of Korea
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4
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Yadav E, Sebastian S, Gupta MK. Aminopyridinyl Tricosanamide Based Pseudoplastic and Thermoreversible Oleogels for pH‐Dependant
in vitro
Release of Metronidazole. ChemistrySelect 2022. [DOI: 10.1002/slct.202203014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Eqvinshi Yadav
- Department of Chemistry School of Basic Sciences Central University of Haryana Mahendergarh-123 031 Haryana India
| | - Sharol Sebastian
- Department of Chemistry School of Basic Sciences Central University of Haryana Mahendergarh-123 031 Haryana India
| | - Manoj K. Gupta
- Department of Chemistry School of Basic Sciences Central University of Haryana Mahendergarh-123 031 Haryana India
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5
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Rençber S, Köse FA, Karavana SY. Development of novel mucoadhesive gels containing nanoparticle for buccal administration of dexamethasone. BRAZ J PHARM SCI 2022. [DOI: 10.1590/s2175-97902022e20041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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6
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Ion-Triggered In Situ Gelling Nanoemulgel as a Platform for Nose-to-Brain Delivery of Small Lipophilic Molecules. Pharmaceutics 2021; 13:pharmaceutics13081216. [PMID: 34452177 PMCID: PMC8400950 DOI: 10.3390/pharmaceutics13081216] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 07/19/2021] [Accepted: 07/21/2021] [Indexed: 11/26/2022] Open
Abstract
Background: Intranasal route offers a direct nose-to-brain delivery via olfactory and trigeminal nerves and minimizes the systemic exposure of the drug. Although reliable and non-invasive, intranasal administration of lipophilic neuroprotective agents for brain targeting is still challenging. Literature focuses on naturally-derived compounds as a promising therapeutics for chronic brain diseases. Naringin, a natural flavonoid obtained from citrus fruits possesses neuroprotective effects. By regulating multiple crucial cellular signaling pathways, naringin acts on several therapeutic targets that make it suitable for the treatment of neurodegenerative diseases like Alzheimer’s disease and making it a suitable candidate for nasal administration. However, the hydrophobicity of naringin is the primary challenge to formulate it in an aqueous system for nasal administration. Method: We designed a lipid-based nanoemulsifying drug delivery system of naringin using Acrysol K140 as an oil, Tween 80 as a surfactant and Transcutol HP as a cosolvent, to improve solubility and harness the benefits of nanosizing like improved cellular penetration. Intranasal instillations of therapeutic agents have limited efficacy due to drug washout and inadequate adherence to the nasal mucosa. Therefore, we reconstituted the naringin self-emulsifying system in a smart, biodegradable, ion-triggered in situ gelling hydrogel and optimized for desirable gel characteristics. The naringin-loaded composition was optimized and characterized for various physicochemical and rheological properties. Results: The formulation showed a mean droplet size 152.03 ± 4.6 nm with a polydispersity index <0.23. Ex vivo transmucosal permeation kinetics of the developed formulation through sheep nasal mucosa showed sustained diffusion and enhanced steady-state flux and permeability coefficient. Scanning and transmission electron microscopy revealed the spherical shape of emulsion droplets and entrapment of droplets in a gel structure. The formulation showed excellent biocompatibility as analyzed from the viability of L929 fibroblast cells and nasal mucosa histopathology after treatment. In vivo biodistribution studies revealed significantly higher drug transport and brain targeting efficiency. Conclusion: In situ gelling system with nanoemulsified naringin demonstrated a safe nasal delivery providing a new dimension to the treatment of chronic neurodegenerative diseases using small hydrophobic phytoconstituents with minimization of dose and related systemic adverse effects.
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7
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Ay Şenyiğit Z, Coşkunmeriç N, Çağlar EŞ, Öztürk İ, Atlıhan Gündoğdu E, Siafaka PI, Üstündağ Okur N. Chitosan-bovine serum albumin-Carbopol 940 nanogels for mupirocin dermal delivery: ex-vivo permeation and evaluation of cellular binding capacity via radiolabeling. Pharm Dev Technol 2021; 26:852-866. [PMID: 34193003 DOI: 10.1080/10837450.2021.1948570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The goal of this study was to develop and examine the nanogel-based topical delivery system of mupirocin. Nanogels were prepared with chitosan and bovine serum albumin by ionic gelation and Carbopol 940 was added to improve the gelling/adhesive properties. Detailed characterization studies were performed and the cellular binding capacity of radiolabeled nanogels was investigated on CCD-1070Sk cell lines. Results indicate the successful formation of nanogels with particle size and zeta potential ranged between 341.920-603.320 nm and 13.120-24.300 mV, respectively. The mechanical and rheological studies proved pseudoplastic and strong elastic gel behavior (G' > G''). Mupirocin was successfully entrapped into nanogels with a ratio of more than 95% and the loaded drug was slowly released up to 93.89 ± 3.07% within 24 h. The ex vivo penetration and permeation percentages of mupirocin were very low (1.172 ± 0.202% and 0.161 ± 0.136%) indicating the suitability of nanogels for dermal use against superficial skin infections. The microbiological studies pointed out the effectiveness of nanogels against Staphylococcus aureus strains. Nanogels did not show toxicity signs and the cell binding capacity of radiolabeled formulations was found to be higher than [99mTc]NaTcO4 to CCD-1070Sk cell line. Overall, mupirocin nanogels might be considered as a potential and safe topical treatment option for bacterial skin infections.
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Affiliation(s)
- Zeynep Ay Şenyiğit
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Izmir Katip Celebi University, Izmir, Turkey
| | - Nesrin Coşkunmeriç
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Ege University, Izmir, Turkey
| | - Emre Şefik Çağlar
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Health Sciences, Istanbul, Turkey
| | - İsmail Öztürk
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Izmir Katip Celebi University, Izmir, Turkey
| | | | - Panoraia I Siafaka
- Department of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece.,KES College, Nicosia, Cyprus
| | - Neslihan Üstündağ Okur
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Health Sciences, Istanbul, Turkey
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8
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Bonkovoski LC, Vilsinski BH, Panice MR, Nunes CS, Braga G, Lazarin-Bidóia D, Nakamura CV, Martins AF, Muniz EC. Cytocompatible drug delivery devices based on poly[(2-dimethylamino) ethyl methacrylate]/chondroitin sulfate polyelectrolyte complexes prepared in ionic liquids. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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9
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Jones DS, Rafferty GP, Andrews GP. Drug release from hydroxypropylcellulose gels cannot be statistically predicted from their viscometric and initial viscoelastic properties. Carbohydr Polym 2021; 256:117512. [PMID: 33483033 DOI: 10.1016/j.carbpol.2020.117512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 12/06/2020] [Accepted: 12/09/2020] [Indexed: 01/16/2023]
Abstract
This study questioned whether rheological properties can predict drug (metronidazole) release from Hydroxypropylcellulose (HPC) platforms. Viscometric and viscoelastic properties of aqueous, alcohols/diols and mixed solvent HPC solutions and gels were determined using viscometry and oscillatory analysis. Drug release was conducted at pH 7.4 under sink conditions. Relationships between rheological parameters and drug release were modelled using multiple linear stepwise regression. Viscometry identified ethanol and water as good solvents for HPC. Diol solvents were predicted to exhibit greater interactions with HPC (COSMO modelling) but possessed lowest intrinsic viscosities. Pentanediol or ethylene glycol prepared gels exhibited greatest elasticity. No relationships were observed between dilute solution properties and initial gel viscoelasticity. Drug release from HPC gels occurred via gel erosion and diffusion. No relationships were observed between initial gel viscoelasticity and drug release and thus, for gel platforms that undergo erosion in aqueous media, drug release cannot be predicted from initial gel viscoelasticity.
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Affiliation(s)
- David S Jones
- School of Pharmacy, Queen's University of Belfast, Belfast, Antrim, Northern Ireland, United Kingdom.
| | - Gerard P Rafferty
- School of Pharmacy, Queen's University of Belfast, Belfast, Antrim, Northern Ireland, United Kingdom
| | - Gavin P Andrews
- School of Pharmacy, Queen's University of Belfast, Belfast, Antrim, Northern Ireland, United Kingdom
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10
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Rosseto HC, de Toledo LDAS, Said dos Santos R, de Francisco LMB, Vecchi CF, Esposito E, Cortesi R, Bruschi ML. Design of propolis-loaded film forming systems for topical administration: The effect of acrylic acid derivative polymers. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114514] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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11
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The effect of carbomer 934P and different vegetable oils on physical stability, mechanical and rheological properties of emulsion-based systems containing propolis. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112969] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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12
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Engineered cartilage utilizing fetal cartilage-derived progenitor cells for cartilage repair. Sci Rep 2020; 10:5722. [PMID: 32235934 PMCID: PMC7109068 DOI: 10.1038/s41598-020-62580-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 01/29/2020] [Indexed: 01/01/2023] Open
Abstract
The aim of this study was to develop a fetal cartilage-derived progenitor cell (FCPC) based cartilage gel through self-assembly for cartilage repair surgery, with clinically useful properties including adhesiveness, plasticity, and continued chondrogenic remodeling after transplantation. Characterization of the gels according to in vitro self-assembly period resulted in increased chondrogenic features over time. Adhesion strength of the cartilage gels were significantly higher compared to alginate gel, with the 2-wk group showing a near 20-fold higher strength (1.8 ± 0.15 kPa vs. 0.09 ± 0.01 kPa, p < 0.001). The in vivo remodeling process analysis of the 2 wk cultured gels showed increased cartilage repair characteristics and stiffness over time, with higher integration-failure stress compared to osteochondral autograft controls at 4 weeks (p < 0.01). In the nonhuman primate investigation, cartilage repair scores were significantly better in the gel group compared to defects alone after 24 weeks (p < 0.001). Cell distribution analysis at 24 weeks showed that human cells remained within the transplanted defects only. A self-assembled, FCPC-based cartilage gel showed chondrogenic repair potential as well as adhesive properties, beneficial for cartilage repair.
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Ferreira SBDS, Braga G, Oliveira ÉL, da Silva JB, Rosseto HC, de Castro Hoshino LV, Baesso ML, Caetano W, Murdoch C, Colley HE, Bruschi ML. Design of a nanostructured mucoadhesive system containing curcumin for buccal application: from physicochemical to biological aspects. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2019; 10:2304-2328. [PMID: 31886108 PMCID: PMC6902884 DOI: 10.3762/bjnano.10.222] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 10/23/2019] [Indexed: 05/04/2023]
Abstract
Mucoadhesive nanostructured systems comprising poloxamer 407 and Carbopol 974P® have already demonstrated good mucoadhesion, as well as improved mechanical and rheological properties. Curcumin displays excellent biological activity, mainly in oral squamous cancer; however, its physicochemical characteristics hinder its application. Therefore, the aim of this study was to develop nanostructured formulations containing curcumin for oral cancer therapy. The photophysical interactions between curcumin and the formulations were elucidated by incorporation kinetics and location studies. They revealed that the drug was quickly incorporated and located in the hydrophobic portion of nanometer-sized polymeric micelles. Moreover, the systems displayed plastic behavior with rheopexy characteristics at 37 °C, viscoelastic properties and a gelation temperature of 36 °C, which ensures increased retention after application in the oral cavity. The mucoadhesion results confirmed the previous findings with the nanostructured systems showing a residence time of 20 min in porcine oral mucosa under flow system conditions. Curcumin was released after 8 h and could permeate through the porcine oral mucosa. Cytotoxicity testing revealed that the formulations were selective to cancer cells over healthy cells. Therefore, these systems could improve the physicochemical characteristics of curcumin by providing improved release and permeation, while selectivity targeting cancer cells.
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Affiliation(s)
- Sabrina Barbosa de Souza Ferreira
- Laboratory of Research and Development of Drug Delivery Systems, Postgraduate Program in Pharmaceutical Sciences, Department of Pharmacy, State University of Maringa, Maringa, Brazil
| | - Gustavo Braga
- Department of Chemistry, State University of Maringa, Maringa, Brazil
| | | | - Jéssica Bassi da Silva
- Laboratory of Research and Development of Drug Delivery Systems, Postgraduate Program in Pharmaceutical Sciences, Department of Pharmacy, State University of Maringa, Maringa, Brazil
| | - Hélen Cássia Rosseto
- Laboratory of Research and Development of Drug Delivery Systems, Postgraduate Program in Pharmaceutical Sciences, Department of Pharmacy, State University of Maringa, Maringa, Brazil
| | | | | | - Wilker Caetano
- Department of Chemistry, State University of Maringa, Maringa, Brazil
| | - Craig Murdoch
- The School of Clinical Dentistry, The University of Sheffield, Sheffield, UK
| | | | - Marcos Luciano Bruschi
- Laboratory of Research and Development of Drug Delivery Systems, Postgraduate Program in Pharmaceutical Sciences, Department of Pharmacy, State University of Maringa, Maringa, Brazil
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14
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In-situ mineralization of calcium carbonate in pectin based edible hydrogel for the delivery of protein at colon. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.101137] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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15
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Wang H, Kong L, Ziegler GR. Fabrication of starch - Nanocellulose composite fibers by electrospinning. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2018.11.047] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Gonzalez-Obeso C, Girotti A, Rodriguez-Cabello JC. A transferrin receptor-binding mucoadhesive elastin-like recombinamer: In vitro and in vivo characterization. Acta Biomater 2019; 88:241-250. [PMID: 30794989 DOI: 10.1016/j.actbio.2019.02.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 02/12/2019] [Accepted: 02/18/2019] [Indexed: 12/24/2022]
Abstract
The development of mucoadhesive materials is of great interest and is also a major challenge. Being adsorption sites, mucosae are suitable targets for drug delivery, but as defensive barriers they are complex biological surfaces to interact with, mainly due to their protective mucus layer. As such, first- and second-generation mucoadhesives focused on material-mucus interactions, whereas the third generation of mucoadhesives introduced structural motifs that are able to interact with the cells beneath the mucus layer. The combination of different prerequisites (water solubility, soft gel formation at body temperature and able to interact with the mucus) in a single molecule is easily achieved using elastin-like recombinamers (ELRs) given their multiple block design. Moreover, we have been able to introduce a short amino-acid sequence known as T7 that is able to bind to transferrin receptors in the epithelial cell layer. The T7 sequence enhances the cell-binding properties of the mucoadhesive ELR (MELR), as demonstrated using a Caco-2 epithelial cell model. In vivo experiments confirmed the mucoadhesive properties found in vitro. STATEMENT OF SIGNIFICANCE: The development of a mucoadhesive material is a major challenge. Mucosae are suitable targets for drug delivery, but as defense barriers, they are complex surfaces to interact with. In this work we report the first ELR that combines different functional blocks, in a single molecule, which provide it with the properties of soft-gel forming at body temperature and being able of efficiently adhering to the mucus layer of mucosas, as well as to the underlying epithelial cell layer, as demonstrated in vitro and in vivo. The rationally designed materials presented in this work sets the basis for developing ELR-based, mucosa-directed drug delivery systems, which could improve patient's compliance, enhancing drug retention at the mucosal site.
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17
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Jones DS, Yu T, Andrews GP. A statistical determination of the contribution of viscoelasticity of aqueous carbohydrate polymer networks to drug release. Carbohydr Polym 2019; 206:511-519. [DOI: 10.1016/j.carbpol.2018.10.072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 07/10/2018] [Accepted: 10/24/2018] [Indexed: 10/28/2022]
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18
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Karavana SY, Şenyiğit ZA, Çalışkan Ç, Sevin G, Özdemir Dİ, Erzurumlu Y, Şen S, Baloğlu E. Gemcitabine hydrochloride microspheres used for intravesical treatment of superficial bladder cancer: a comprehensive in vitro/ex vivo/in vivo evaluation. Drug Des Devel Ther 2018; 12:1959-1975. [PMID: 29997433 PMCID: PMC6033088 DOI: 10.2147/dddt.s164704] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION Bladder cancer is responsible for more than 130,000 deaths annually worldwide. Intravesical delivery of chemotherapeutic agents provides effective drug localization to the target area to reduce toxicity and increase efficacy. This study aimed to develop an intravesical delivery system of gemcitabine HCl (Gem-HCl) to provide a sustained-release profile, to prolong residence time, and to enhance its efficiency in the treatment of bladder cancer. MATERIALS AND METHODS For this purpose, bioadhesive microspheres were successfully prepared with average particle size, encapsulation efficiency, and loading capacity of 98.4 µm, 82.657%±5.817%, and 12.501±0.881 mg, respectively. For intravesical administration, bioadhesive microspheres were dispersed in mucoadhesive chitosan or in situ poloxamer gels and characterized in terms of gelation temperature, viscosity, mechanical, syringeability, and bioadhesive and rheological properties. The cytotoxic effects of Gem-HCl solution, Gem-HCl microspheres, and Gem-HCl microsphere-loaded gel formulations were evaluated in two different bladder cancer cell lines: T24 (ATCC HTB4TM) and RT4 (ATCC HTB2TM). RESULTS According to cell-culture studies, Gem-HCl microsphere-loaded poloxamer gel was more cytotoxic than Gem-HCl microsphere-loaded chitosan gel. Antitumor efficacy of newly developed formulations were investigated by in vivo studies using bladder-tumor-induced rats. CONCLUSION According to in vivo studies, Gem-HCl microsphere-loaded poloxamer gel was found to be an effective and promising alternative for current intravesical delivery-system therapies.
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MESH Headings
- Administration, Intravesical
- Animals
- Antimetabolites, Antineoplastic/administration & dosage
- Antimetabolites, Antineoplastic/chemistry
- Antimetabolites, Antineoplastic/therapeutic use
- Cell Line, Tumor
- Deoxycytidine/administration & dosage
- Deoxycytidine/analogs & derivatives
- Deoxycytidine/chemistry
- Deoxycytidine/therapeutic use
- Drug Compounding
- Humans
- In Vitro Techniques
- Microscopy, Electron, Scanning
- Microspheres
- Neoplasms, Experimental/drug therapy
- Neoplasms, Experimental/pathology
- Particle Size
- Rats
- Rats, Sprague-Dawley
- Rheology
- Urinary Bladder Neoplasms/drug therapy
- Urinary Bladder Neoplasms/pathology
- Viscosity
- Gemcitabine
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Affiliation(s)
- Sinem Yaprak Karavana
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Ege University, Izmir, Turkey,
| | - Zeynep Ay Şenyiğit
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Izmir Katip Çelebi University, Izmir, Turkey
| | - Çağrı Çalışkan
- Department of Radiopharmacy, Faculty of Pharmacy, Ege University, Izmir, Turkey
| | - Gülnur Sevin
- Department of Pharmacology, Faculty of Pharmacy, Ege University, Izmir, Turkey
| | - Derya İlem Özdemir
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Izmir Katip Çelebi University, Izmir, Turkey
| | - Yalçın Erzurumlu
- Department of Biochemistry, Faculty of Pharmacy, Ege University, Izmir, Turkey
| | - Sait Şen
- Department of Pathology, Faculty of Medicine, Ege University, Izmir, Turkey
| | - Esra Baloğlu
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Ege University, Izmir, Turkey,
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19
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Salawi A, Nazzal S. The rheological and textural characterization of Soluplus®/Vitamin E composites. Int J Pharm 2018; 546:255-262. [PMID: 29792987 DOI: 10.1016/j.ijpharm.2018.05.049] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/17/2018] [Accepted: 05/19/2018] [Indexed: 11/16/2022]
Abstract
Soluplus® is a graft amphiphilic copolymer that is frequently used as an excipient in solid dosage forms as a dissolution and a solubility enhancer. We discovered that Soluplus® can be dissolved in vitamin E. The result is a tacky and highly adhesive material. Our research objective was to evaluate the rheological, adhesive, and textural properties of the Soluplus®/Vitamin E composites. In this study, Soluplus® was dissolved under heat in vitamin E at increasing concentrations from 0 to 40% (by weight). The flow behavior of the Soluplus®/Vitamin E composites was determined by applying shear stress using an advanced AR2000 rheometer. Under the linear viscoelastic region (LVR), the rheological properties of the blends such as dynamic viscosity (η'), storage modulus (G'), loss modulus (G″), and the phase angle tangent (tan δ) were measured. Hardness, adhesiveness, and cohesiveness of the blends were also measured with a TA.XT plus texture analyzer. Rheological analysis showed that the viscosity of the Soluplus®/Vitamin E composites increased with an increase in Soluplus® concentration but decreased as the temperature increased from 20 to 90 °C. The adhesiveness of the blends also significantly increased with an increase in Soluplus® concentration. The results from this study indicated that Soluplus®/Vitamin E composites have the potential to be exploited in applications where the use of highly adhesive material is desirable.
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Affiliation(s)
- Ahmad Salawi
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Sami Nazzal
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA.
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20
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Eren B, Tuncay Tanrıverdi S, Aydın Köse F, Özer Ö. Antioxidant properties evaluation of topical astaxanthin formulations as anti‐aging products. J Cosmet Dermatol 2018; 18:242-250. [DOI: 10.1111/jocd.12665] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/09/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Bilge Eren
- Faculty of Pharmacy Department of Pharmaceutical Technology Ege University IzmirTurkey
| | | | - Fadime Aydın Köse
- Faculty of Pharmacy Department of Biochemistry Ege University Izmir Turkey
| | - Özgen Özer
- Faculty of Pharmacy Department of Pharmaceutical Technology Ege University IzmirTurkey
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21
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Assessing Mucoadhesion in Polymer Gels: The Effect of Method Type and Instrument Variables. Polymers (Basel) 2018; 10:polym10030254. [PMID: 30966289 PMCID: PMC6415125 DOI: 10.3390/polym10030254] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 02/08/2018] [Accepted: 02/27/2018] [Indexed: 11/17/2022] Open
Abstract
The process of mucoadhesion has been widely studied using a wide variety of methods, which are influenced by instrumental variables and experiment design, making the comparison between the results of different studies difficult. The aim of this work was to standardize the conditions of the detachment test and the rheological methods of mucoadhesion assessment for semisolids, and introduce a texture profile analysis (TPA) method. A factorial design was developed to suggest standard conditions for performing the detachment force method. To evaluate the method, binary polymeric systems were prepared containing poloxamer 407 and Carbopol 971P®, Carbopol 974P®, or Noveon® Polycarbophil. The mucoadhesion of systems was evaluated, and the reproducibility of these measurements investigated. This detachment force method was demonstrated to be reproduceable, and gave different adhesion when mucin disk or ex vivo oral mucosa was used. The factorial design demonstrated that all evaluated parameters had an effect on measurements of mucoadhesive force, but the same was not observed for the work of adhesion. It was suggested that the work of adhesion is a more appropriate metric for evaluating mucoadhesion. Oscillatory rheology was more capable of investigating adhesive interactions than flow rheology. TPA method was demonstrated to be reproducible and can evaluate the adhesiveness interaction parameter. This investigation demonstrates the need for standardized methods to evaluate mucoadhesion and makes suggestions for a standard study design.
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22
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Kenechukwu FC, Attama AA, Ibezim EC, Nnamani PO, Umeyor CE, Uronnachi EM, Gugu TH, Momoh MA, Ofokansi KC, Akpa PA. Surface-modified mucoadhesive microgels as a controlled release system for miconazole nitrate to improve localized treatment of vulvovaginal candidiasis. Eur J Pharm Sci 2017; 111:358-375. [PMID: 28986195 DOI: 10.1016/j.ejps.2017.10.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 09/23/2017] [Accepted: 10/02/2017] [Indexed: 01/27/2023]
Abstract
The use of conventional vaginal formulations of miconazole nitrate (MN) in the treatment of deep-seated VVC (vulvovaginal candidiasis) is limited by poor penetration capacity and low solubility of MN, short residence time and irritation at the application site. Surface-modified mucoadhesive microgels were developed to minimize local irritation, enhance penetration capacity and solubility and prolong localized vaginal delivery of MN for effective treatment of deep-seated VVC. Solid lipid microparticles (SLMs) were prepared from matrices consisting of hydrogenated palm oil (Softisan® 154, SF) and super-refined sunseed oil (SO) with or without polyethylene glycol (PEG)-4000, characterized for physicochemical performance and used to prepare mucoadhesive microgels (MMs) encapsulating MN, employing Polycarbophil as bioadhesive polymer. The MMs were evaluated for physicochemical performance and in vitro drug release in simulated vaginal fluid (pH=4.2), whereas mucoadhesive, rheological and stability tests, anticandidal efficacy in immunosuppressed estrogen-dependent female rats and vaginal tolerance test in rabbits were performed with optimized formulation. The amorphicity of 1:9 phytolipid blend (SO:SF) was increased in the presence of PEG-4000. The physicochemical properties of the SLMs and MMs indicated their suitability for vaginal drug delivery. Overall, MN-loaded PEGylated MMs exhibited significantly (p<0.05) more prolonged drug release than non-PEGylated MMs. Additionally, optimized PEGylated MMs was stable at 40±2°C over a period of 6months, viscoelastic, mucoadhesive, non-sensitizing, histopathologically safe and gave remarkably (p<0.05) higher reduction in Candida albicans load (86.06%) than Daktarin® (75.0%) and MN-loaded polymeric-hydrogel (47.74%) in treated rats in 12days. Thus, PEGylated MMs is promising for effective and convenient treatment of VVC.
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Affiliation(s)
- Franklin C Kenechukwu
- Drug Delivery and Nanomedicines Research Group, Department of Pharmaceutics, University of Nigeria, Nsukka 410001, Enugu State, Nigeria.
| | - Anthony A Attama
- Drug Delivery and Nanomedicines Research Group, Department of Pharmaceutics, University of Nigeria, Nsukka 410001, Enugu State, Nigeria
| | - Emmanuel C Ibezim
- Drug Delivery and Nanomedicines Research Group, Department of Pharmaceutics, University of Nigeria, Nsukka 410001, Enugu State, Nigeria
| | - Petra O Nnamani
- Drug Delivery and Nanomedicines Research Group, Department of Pharmaceutics, University of Nigeria, Nsukka 410001, Enugu State, Nigeria
| | - Chukwuebuka E Umeyor
- Nanomedicines and Drug Delivery Unit, Department of Pharmaceutics and Pharmaceutical Technology, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria
| | - Emmanuel M Uronnachi
- Nanomedicines and Drug Delivery Unit, Department of Pharmaceutics and Pharmaceutical Technology, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria
| | - Thaddeus H Gugu
- Drug Delivery and Nanomedicines Research Group, Department of Pharmaceutics, University of Nigeria, Nsukka 410001, Enugu State, Nigeria
| | - Mumuni A Momoh
- Drug Delivery and Nanomedicines Research Group, Department of Pharmaceutics, University of Nigeria, Nsukka 410001, Enugu State, Nigeria
| | - Kenneth C Ofokansi
- Drug Delivery and Nanomedicines Research Group, Department of Pharmaceutics, University of Nigeria, Nsukka 410001, Enugu State, Nigeria
| | - Paul A Akpa
- Drug Delivery and Nanomedicines Research Group, Department of Pharmaceutics, University of Nigeria, Nsukka 410001, Enugu State, Nigeria
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De Souza Ferreira SB, Da Silva JB, Volpato Junqueira M, Belincanta Borghi-Pangoni F, Guttierres Gomes R, Luciano Bruschi M. The importance of the relationship between mechanical analyses and rheometry of mucoadhesive thermoresponsive polymeric materials for biomedical applications. J Mech Behav Biomed Mater 2017; 74:142-153. [DOI: 10.1016/j.jmbbm.2017.05.040] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 05/28/2017] [Accepted: 05/31/2017] [Indexed: 01/14/2023]
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24
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Linear correlation between rheological, mechanical and mucoadhesive properties of polycarbophil polymer blends for biomedical applications. J Mech Behav Biomed Mater 2017; 68:265-275. [DOI: 10.1016/j.jmbbm.2017.02.016] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 02/10/2017] [Accepted: 02/12/2017] [Indexed: 12/15/2022]
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25
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Design of binary polymeric platforms containing ɩ-carrageenan and hydroxypropylcellulose for use in cataract surgery. Carbohydr Polym 2016; 154:296-304. [DOI: 10.1016/j.carbpol.2016.06.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 05/22/2016] [Accepted: 06/10/2016] [Indexed: 11/20/2022]
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26
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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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27
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Hao J, Zhao J, Zhang S, Tong T, Zhuang Q, Jin K, Chen W, Tang H. Fabrication of an ionic-sensitive in situ gel loaded with resveratrol nanosuspensions intended for direct nose-to-brain delivery. Colloids Surf B Biointerfaces 2016; 147:376-386. [PMID: 27566226 DOI: 10.1016/j.colsurfb.2016.08.011] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 08/08/2016] [Accepted: 08/09/2016] [Indexed: 02/01/2023]
Abstract
The objective of this study was to fabricate a composite in situ gelling formulation combining nanoparticulates and an ionic-triggered deacetylated gellan gum (DGG) matrix for challenging intranasal drug delivery. The prepared resveratrol nanosuspensions (Res-NSs) were distributed in DGG solutions. Parameters such as the in situ gelation capability, particle size, rheological properties, and texture profiles were used to describe the properties of the in situ gel. Pharmacokinetic and brain-targeting efficiency studies were performed after intranasal and intravenous administration, respectively. Biodistribution and localization using in vivo imaging systems and fluorescence microscopy are also described. The formulation containing 0.6% w/v DGG displayed a favorable gelling ability and the desired viscosity. The rheology results established that the DGG in situ gel possesses the characteristics of shear thinning, thixotropy and yield stress. The results of the textural profile revealed an increase in adhesiveness and viscosity for the in situ gel compared to the DGG solution. In vitro penetration studies followed a Higuchi mathematic model. Pharmacokinetics revealed a 2.88-times increase of bioavailability in the brain by intranasal Res-NSs in situ gel formulation. The drug targeting efficiency (458.2%) and direct transport percentages (78.18%) demonstrated direct delivery via the nose-brain pathway. The distribution and localization further illustrated the existence of direct nose-to-brain transport, bypassing the BBB. In sum, this hybrid in situ gel system is a promising approach for intranasal application in terms of the enhancement of nasal mucosal permeability and increased nasal cavity residence time by a nanotechnology delivery system and in situ gelling technology.
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Affiliation(s)
- Jifu Hao
- College of Pharmacy, Taishan Medical University, Taian 271016, PR China.
| | - Jing Zhao
- College of Pharmacy, Taishan Medical University, Taian 271016, PR China
| | - Shupeng Zhang
- Pathology Department, Taishan Medical University Affiliated Hospital, Taian 271016, PR China
| | - Tiantian Tong
- College of Pharmacy, Taishan Medical University, Taian 271016, PR China
| | - Qiannan Zhuang
- College of Pharmacy, Taishan Medical University, Taian 271016, PR China
| | - Kai Jin
- College of Pharmacy, Taishan Medical University, Taian 271016, PR China
| | - Wei Chen
- College of Pharmacy, Taishan Medical University, Taian 271016, PR China
| | - Hua Tang
- College of Pharmacy, Taishan Medical University, Taian 271016, PR China.
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28
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The Monoglyceride Content Affects the Self-Assembly Behavior, Rheological Properties, Syringeability, and Mucoadhesion of In Situ–Gelling Liquid Crystalline Phase. J Pharm Sci 2016; 105:2355-64. [DOI: 10.1016/j.xphs.2016.05.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 04/24/2016] [Accepted: 05/03/2016] [Indexed: 10/21/2022]
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29
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Rençber S, Karavana SY, Şenyiğit ZA, Eraç B, Limoncu MH, Baloğlu E. Mucoadhesive in situ gel formulation for vaginal delivery of clotrimazole: formulation, preparation, and in vitro/in vivo evaluation. Pharm Dev Technol 2016; 22:551-561. [PMID: 27055376 DOI: 10.3109/10837450.2016.1163385] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The purpose of this study was to develop a suitable mucoadhesive in situ gel formulation of clotrimazole (CLO) for the treatment of vaginal candidiasis. For this aim, the mixture of poloxamer (PLX) 407 and 188 were used to prepare in situ gels. Hydroxypropyl methylcellulose (HPMC) K100M or E50 was added to in situ gels in 0.5% ratio to improve the mucoadhesive and mechanical properties of formulations and to prolong the residence time in vaginal cavity. After the preparation of mucoadhesive in situ gels; gelation temperature/time, viscosity, mechanical, mucoadhesive, syringeability, spreadibility and rheological properties, in vitro release behavior, and anticandidal activities were determined. Moreover vaginal retention of mucoadhesive in situ gels was investigated with in vivo distribution studies in rats. Based on the obtained results, it was found that gels prepared with 20% PLX 407, 10% PLX 188 and 0.5% HPMC K100M/E50 might be suitable for vaginal administration of CLO. In addition, the results of in vivo distribution studies showed that gel formulations remained on the vaginal mucosa even 24 h after application. In conclusion, the mucoadhesive in situ gels of CLO would be alternative candidate for treatment of vaginal candidiasis since it has suitable gel properties with good vaginal retention.
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Affiliation(s)
- Seda Rençber
- a Department of Pharmaceutical Technology , Ege University , Bornova , Izmir , Turkey
| | - Sinem Yaprak Karavana
- a Department of Pharmaceutical Technology , Ege University , Bornova , Izmir , Turkey
| | - Zeynep Ay Şenyiğit
- a Department of Pharmaceutical Technology , Ege University , Bornova , Izmir , Turkey
| | - Bayri Eraç
- b Department of Pharmaceutical Microbiology, Faculty of Pharmacy , Ege University , Bornova , Izmir , Turkey
| | - Mine Hoşgör Limoncu
- b Department of Pharmaceutical Microbiology, Faculty of Pharmacy , Ege University , Bornova , Izmir , Turkey
| | - Esra Baloğlu
- a Department of Pharmaceutical Technology , Ege University , Bornova , Izmir , Turkey
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30
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Jones DS, Margetson DN, McAllister MS, Andrews GP. Reprint of “Characterisation and modelling of the thermorheological properties of pharmaceutical polymers and their blends using capillary rheometry: Implications for hot melt processing of dosage forms”. Int J Pharm 2015; 496:86-94. [DOI: 10.1016/j.ijpharm.2015.10.060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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31
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De Souza Ferreira SB, Moço TD, Borghi-Pangoni FB, Junqueira MV, Bruschi ML. Rheological, mucoadhesive and textural properties of thermoresponsive polymer blends for biomedical applications. J Mech Behav Biomed Mater 2015; 55:164-178. [PMID: 26590909 DOI: 10.1016/j.jmbbm.2015.10.026] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 10/28/2015] [Accepted: 10/30/2015] [Indexed: 11/19/2022]
Abstract
The development of binary polymeric mixtures (polymer blends) containing bioadhesive and thermoresponsive polymers can provide new materials for biomedical applications, with higher contact, increased adhesion, prolonged residence time, protection, and in determined cases, secured absorption of an active agent from the site of application. Mixtures were prepared using a wide range of poloxamer 407 and Carbopol 971P(®) amounts. The rheological (flow and oscillatory), sol-gel transition temperature, mechanical (hardness, compressibility, adhesiveness, cohesiveness and elasticity), softness, and mucoadhesive properties of formulations were investigated. Moreover, the interaction between the different proportions of polymers was also analyzed. Continuous shear and oscillatory rheometry identified the plastic flow with various degrees of thixotropy, besides the viscoelastic behavior of formulations. The determination of gelation temperature displayed values ranged from 27.17 to 41.09°C. It was also found that low carbomer concentrations were enough to provide positive interaction parameter. However, the highest values were obtained for the polymeric blends with higher concentration of poloxamer 407. The mucoadhesion and softness index were greater in preparations containing 20% (w/w) poloxamer 407. The rheological, mechanical and mucoadhesive properties of the polymeric blends can be manipulated by changing the concentrations of the polymers and they suggest the blends are worthy of biomedical applications.
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Affiliation(s)
- Sabrina Barbosa De Souza Ferreira
- Postgraduate Program in Pharmaceutical Sciences, Maringá, Paraná, Brazil; Laboratory of Research and Development of Drug Delivery Systems, Maringá, Paraná, Brazil
| | - Talita Dias Moço
- Laboratory of Research and Development of Drug Delivery Systems, Maringá, Paraná, Brazil
| | - Fernanda Belincanta Borghi-Pangoni
- Postgraduate Program in Pharmaceutical Sciences, Maringá, Paraná, Brazil; Laboratory of Research and Development of Drug Delivery Systems, Maringá, Paraná, Brazil
| | - Mariana Volpato Junqueira
- Postgraduate Program in Pharmaceutical Sciences, Maringá, Paraná, Brazil; Laboratory of Research and Development of Drug Delivery Systems, Maringá, Paraná, Brazil
| | - Marcos Luciano Bruschi
- Postgraduate Program in Pharmaceutical Sciences, Maringá, Paraná, Brazil; Laboratory of Research and Development of Drug Delivery Systems, Maringá, Paraná, Brazil; Department of Pharmacy, State University of Maringá, Maringá, Paraná, Brazil.
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32
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Şenyiğit ZA, Karavana SY, İlem-Özdemir D, Çalışkan Ç, Waldner C, Şen S, Bernkop-Schnürch A, Baloğlu E. Design and evaluation of an intravesical delivery system for superficial bladder cancer: preparation of gemcitabine HCl-loaded chitosan-thioglycolic acid nanoparticles and comparison of chitosan/poloxamer gels as carriers. Int J Nanomedicine 2015; 10:6493-507. [PMID: 26508855 PMCID: PMC4610785 DOI: 10.2147/ijn.s93750] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
This study aimed to develop an intravesical delivery system of gemcitabine HCl for superficial bladder cancer in order to provide a controlled release profile, to prolong the residence time, and to avoid drug elimination via urination. For this aim, bioadhesive nanoparticles were prepared with thiolated chitosan (chitosan–thioglycolic acid conjugate) and were dispersed in bioadhesive chitosan gel or in an in situ gelling poloxamer formulation in order to improve intravesical residence time. In addition, nanoparticle-loaded gels were diluted with artificial urine to mimic in vivo conditions in the bladder and were characterized regarding changes in gel structure. The obtained results showed that chitosanthioglycolic acid nanoparticles with a mean diameter of 174.5±3.762 nm and zeta potential of 32.100±0.575 mV were successfully developed via ionotropic gelation and that the encapsulation efficiency of gemcitabine HCl was nearly 20%. In vitro/ex vivo characterization studies demonstrated that both nanoparticles and nanoparticle-loaded chitosan and poloxamer gels might be alternative carriers for intravesical administration of gemcitabine HCl, prolonging its residence time in the bladder and hence improving treatment efficacy. However, when the gel formulations were diluted with artificial urine, poloxamer gels lost their in situ gelling properties at body temperature, which is in conflict with the aimed formulation property. Therefore, 2% chitosan gel formulation was found to be a more promising carrier system for intravesical administration of nanoparticles.
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Affiliation(s)
- Zeynep Ay Şenyiğit
- Faculty of Pharmacy, Department of Pharmaceutical Technology, Ege University, Bornova, İzmir, Turkey
| | - Sinem Yaprak Karavana
- Faculty of Pharmacy, Department of Pharmaceutical Technology, Ege University, Bornova, İzmir, Turkey
| | - Derya İlem-Özdemir
- Faculty of Pharmacy, Department of Radiopharmacy, Ege University, Bornova, İzmir, Turkey
| | - Çağrı Çalışkan
- Faculty of Pharmacy, Department of Radiopharmacy, Ege University, Bornova, İzmir, Turkey
| | | | - Sait Şen
- Faculty of Medicine, Department of Pathology, Ege University, Bornova, İzmir, Turkey
| | - Andreas Bernkop-Schnürch
- Institute of Pharmacy, Department of Pharmaceutical Technology, University of Innsbruck, Innsbruck, Austria
| | - Esra Baloğlu
- Faculty of Pharmacy, Department of Pharmaceutical Technology, Ege University, Bornova, İzmir, Turkey
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33
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Jones DS, Margetson DN, McAllister MS, Andrews GP. Characterisation and modelling of the thermorheological properties of pharmaceutical polymers and their blends using capillary rheometry: Implications for hot melt processing of dosage forms. Int J Pharm 2015; 493:251-9. [DOI: 10.1016/j.ijpharm.2015.07.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 06/26/2015] [Accepted: 07/08/2015] [Indexed: 11/25/2022]
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34
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Podaralla S, Alt C, Shankar GN. Formulation development and evaluation of innovative two-polymer (SR-2P) bioadhesive vaginal gel. AAPS PharmSciTech 2014; 15:928-38. [PMID: 24781671 DOI: 10.1208/s12249-014-0124-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Accepted: 04/01/2014] [Indexed: 11/30/2022] Open
Abstract
The main objective of this investigation was to study the feasibility of developing a vaginal bioadhesive microbicide using a SRI's proprietary two-polymer gel platform (SR-2P). Several formulations were prepared with different combinations of temperature-sensitive polymer (Pluronic® F-127) and mucoadhesive polymer (Noveon® AA-1), producing gels of different characteristics. Prototype polymeric gels were evaluated for pH, osmolality, buffering capacity, and viscosity under simulated vaginal semen dilutions, and bioadhesivity using ex vivo mini pig vaginal tissues and texture analyzer. The pH of the polymeric gel formulations ranged from 5.1 to 6.4; the osmolality varied from 13 to 173 mOsm. Absolute viscosity ranged from 513 to 3,780 cPs, and was significantly reduced (1.5- to 3-fold) upon incubation with simulated vaginal and semen fluid mixture. Among the tested gels (indicated in the middle row as a molar ratio of a mixture of Noveon vs. Pluronic), only SR-2P retained gel structure upon dilution with simulated fluids and mild simulated coital stress. The pH of the SR-2P gel was maintained at about 4.6 in simulated vaginal fluid and also showed high peak force of adhesion in mini pig vaginal tissue. Furthermore, SR-2P gel caused no or only minimal irritation in a mouse vaginal irritation model. The results of this preliminary study demonstrated the potential application of SR-2P gel as a vaginal microbicide vehicle for delivery of anti-HIV agents.
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35
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López-Cebral R, Romero-Caamaño V, Seijo B, Alvarez-Lorenzo C, Martín-Pastor M, Concheiro Á, Landin M, Sanchez A. Spermidine Cross-Linked Hydrogels as a Controlled Release Biomimetic Approach for Cloxacillin. Mol Pharm 2014; 11:2358-71. [DOI: 10.1021/mp500067z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Rita López-Cebral
- Department
of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Vanessa Romero-Caamaño
- Department
of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Begoña Seijo
- Department
of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
- Molecular
Image Group, University of Santiago de Compostela Clinical Hospital, Travesía
da Choupana, 15706 Santiago de Compostela, Spain
| | - Carmen Alvarez-Lorenzo
- Department
of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Manuel Martín-Pastor
- Nuclear
Magnetic Resonance Unit, University of Santiago de Compostela, Campus
Vida, 15706 Santiago
de Compostela, Spain
| | - Ángel Concheiro
- Department
of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Mariana Landin
- Department
of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Alejandro Sanchez
- Department
of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
- Molecular
Image Group, University of Santiago de Compostela Clinical Hospital, Travesía
da Choupana, 15706 Santiago de Compostela, Spain
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36
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Satapathy D, Sagiri S, Pal K, Pramanik K. Development of mustard oil- and groundnut oil-based span 40 organogels as matrices for controlled drug delivery. Des Monomers Polym 2013. [DOI: 10.1080/15685551.2013.869652] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Affiliation(s)
- D. Satapathy
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, India
| | - S.S. Sagiri
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, India
| | - K. Pal
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, India
| | - K. Pramanik
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, India
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37
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Lecithin-based emulsions for potential use as saliva substitutes in patients with xerostomia – viscoelastic properties. Int J Pharm 2013; 456:560-8. [DOI: 10.1016/j.ijpharm.2013.08.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Revised: 08/07/2013] [Accepted: 08/10/2013] [Indexed: 11/21/2022]
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38
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Keshavarz M, Kaffashi B. The ability of retention, drug release and rheological properties of nanogel bioadhesives based on cellulose derivatives. Pharm Dev Technol 2013; 19:952-9. [PMID: 24160773 DOI: 10.3109/10837450.2013.846371] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The rheological and drug release behavior of biopolymer nanocomposite gels based on the cellulose derivatives, formulated as the bioadhesive drug delivery platforms, were investigated. The bioadhesive gel is composed of the microcrystalline cellulose, sodium carboxymethyl cellulose and phosphate buffered saline (pH = 7.4 at 20 °C) as the dissolution and release medium. The reinforcing nanofillers such as MMT-clay, fumed porous silica and porous starch were used as additives in the nanogel bioadhesive. The constant steady state viscosities of this nanogels upon incorporation of various nanofillers into the systems is the sign of structural stability. Hence, this system is suitable for use in the controlled drug delivery systems in contact with the biological tissues. Based on the rheological measurements, the shear flow properties (i.e. zero shear viscosity and yield stress) were influenced by the concentration of polymers and nanoparticles. The results indicate that the nonlinear rheological data are fitted properly by the Giesekus model. Furthermore, the results showed that the nonlinear viscoelastic parameters (λ and α) are highly affected by the biogel and nanoparticles concentrations. Finally, the drug release was measured, and the results indicated that the biopolymer-clay nanocomposites have appropriate release pattern as the release is better controlled compared to the other nanogel formulations.
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Affiliation(s)
- M Keshavarz
- Department of Polymer Engineering, School of Chemical Engineering, University of Tehran , Tehran , Iran
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39
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Wyatt NB, Grillet AM. Rheology, adhesion, and debonding mechanisms in fluorosilicone polymer gels. J Appl Polym Sci 2013. [DOI: 10.1002/app.40034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Nicholas B. Wyatt
- Materials Science and Engineering Division; Sandia National Laboratories; P.O. Box 5800 MS - 0958 Albuquerque New Mexico 87185
| | - Anne M. Grillet
- Engineering Sciences Division; Sandia National Laboratories; P.O. Box 5800 MS - 0346 Albuquerque New Mexico 87185
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40
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Berretta AA, de Castro PA, Cavalheiro AH, Fortes VS, Bom VP, Nascimento AP, Marquele-Oliveira F, Pedrazzi V, Ramalho LNZ, Goldman GH. Evaluation of Mucoadhesive Gels with Propolis (EPP-AF) in Preclinical Treatment of Candidiasis Vulvovaginal Infection. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2013; 2013:641480. [PMID: 23997797 PMCID: PMC3749595 DOI: 10.1155/2013/641480] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Revised: 06/12/2013] [Accepted: 06/13/2013] [Indexed: 12/23/2022]
Abstract
Vulvovaginal candidiasis is the second cause of vaginal infection in the USA. Clinical treatment of C. albicans infections is routinely performed with polyenes and azole derivatives. However, these drugs are responsible for undesirable side effects and toxicity. In addition, C. albicans azole and echinocandin resistance has been described. Propolis is a bee product traditionally used due to its antimicrobial, anti-inflammatory, and other properties. Therefore, the present work aimed to evaluate different propolis presentations in order to evaluate their in vitro and in vivo efficacy. The methodologies involved antifungal evaluation, chemical analysis, and the effects of the rheological and mucoadhesive properties of propolis based gels. The obtained results demonstrated the fungicide action of propolis extracts against all three morphotypes (yeast, pseudohyphae, and hyphae) studied. The highest level of fungal cytotoxicity was reached at 6-8 hours of propolis cell incubation. Among the based gel formulations developed, the rheological and mucoadhesive results suggest that propolis based carbopol (CP1%) and chitosan gels were the most pseudoplastic ones. CP1% was the most mucoadhesive preparation, and all of them presented low thixotropy. Results of in vivo efficacy demonstrated that propolis based gels present antifungal action similar to clotrimazole cream, suggesting that future clinical studies should be performed.
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Affiliation(s)
- Andresa Aparecida Berretta
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, 14040-903 Ribeirão Preto, SP, Brazil
- Laboratório de Pesquisa, Desenvolvimento e Inovação, Apis Flora Indl. Coml. Ltda., 14020-670 Ribeirão Preto, SP, Brazil
| | - Patrícia Alves de Castro
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, 14040-903 Ribeirão Preto, SP, Brazil
| | - Amanda Henriques Cavalheiro
- Laboratório de Pesquisa, Desenvolvimento e Inovação, Apis Flora Indl. Coml. Ltda., 14020-670 Ribeirão Preto, SP, Brazil
| | - Vanessa Silveira Fortes
- Laboratório de Pesquisa, Desenvolvimento e Inovação, Apis Flora Indl. Coml. Ltda., 14020-670 Ribeirão Preto, SP, Brazil
| | - Vinícius Pedro Bom
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, 14040-903 Ribeirão Preto, SP, Brazil
| | - Andresa Piacezzi Nascimento
- Laboratório de Pesquisa, Desenvolvimento e Inovação, Apis Flora Indl. Coml. Ltda., 14020-670 Ribeirão Preto, SP, Brazil
| | - Franciane Marquele-Oliveira
- Laboratório de Pesquisa, Desenvolvimento e Inovação, Apis Flora Indl. Coml. Ltda., 14020-670 Ribeirão Preto, SP, Brazil
| | - Vinícius Pedrazzi
- Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo, 14040-903 Ribeirão Preto, SP, Brazil
| | | | - Gustavo Henrique Goldman
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, 14040-903 Ribeirão Preto, SP, Brazil
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol-CTBE, Caixa Postal 6170, 13083-970 Campinas, SP, Brazil
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41
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Teng Z, Li Y, Luo Y, Zhang B, Wang Q. Cationic β-Lactoglobulin Nanoparticles as a Bioavailability Enhancer: Protein Characterization and Particle Formation. Biomacromolecules 2013; 14:2848-56. [DOI: 10.1021/bm4006886] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Zi Teng
- Department
of Nutrition and
Food Science, University of Maryland, 0112
Skinner Building, College Park, Maryland 20742, United States
| | - Ying Li
- College of Light Industry and
Food Science, South China University of Technology, Tianhe District, Guangzhou, 510640, People’s Republic of
China
| | - Yangchao Luo
- Department
of Nutrition and
Food Science, University of Maryland, 0112
Skinner Building, College Park, Maryland 20742, United States
| | - Boce Zhang
- Department
of Nutrition and
Food Science, University of Maryland, 0112
Skinner Building, College Park, Maryland 20742, United States
| | - Qin Wang
- Department
of Nutrition and
Food Science, University of Maryland, 0112
Skinner Building, College Park, Maryland 20742, United States
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42
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Karavana SY, Gökçe EH, Rençber S, Özbal S, Pekçetin C, Güneri P, Ertan G. A new approach to the treatment of recurrent aphthous stomatitis with bioadhesive gels containing cyclosporine A solid lipid nanoparticles: in vivo/in vitro examinations. Int J Nanomedicine 2012. [PMID: 23180964 PMCID: PMC3497893 DOI: 10.2147/ijn.s36883] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Aim To develop a suitable buccal bioadhesive gel formulation containing cyclosporine A solid lipid nanoparticles (CsA SLNs) for the treatment of recurrent aphthous stomatitis. Methods The suitability of the prepared formulations for buccal application was assessed by means of rheological studies, textural profile analysis, and ex vivo drug-release studies. Plastic flows, typical gel-like spectra, and suitable mechanical properties were obtained from prepared formulations. The retention time was explored in in vivo distribution studies and the effect of the gel containing CsA SLNs on the healing of oral mucosal ulceration was investigated in an animal model. In vivo distribution studies are a very important indicator of the retention time of formulations at the application site. Results Distribution studies showed that 64.76% ± 8.35% of the formulation coded “F8+SLN” remained on the buccal mucosa 6 hours after application. For the second part of the in vivo experiments, 36 rabbits were separated into three groups: the first group was treated with the gel formulation without the active agent; the second group with the gel formulation containing CsA SLNs; and the third group, used as the control group, received no treatment. Wound healing was established by scoring of the rate of wound healing on Days 3, 6, 9, and 12. Histological observations were made on the same days as the scoring studies. The bioadhesive gel formulation that included CsA SLNs increased the rate of mucosal repair significantly. Conclusion This study has shown that the bioadhesive gel formulation containing CsA SLNs reported here is a promising candidate for the topical treatment of recurrent aphthous stomatitis.
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Affiliation(s)
- Sinem Yaprak Karavana
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Ege University, Bornova-Izmir, Turkey.
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43
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Zhang W, Du Z, Wang W, Wang T. Synthesis and aggregation behavior of grafted maleic acid copolymers. J Colloid Interface Sci 2012; 374:187-96. [DOI: 10.1016/j.jcis.2012.01.052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Revised: 01/24/2012] [Accepted: 01/25/2012] [Indexed: 10/14/2022]
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44
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Pliszczak D, Bordes C, Bourgeois S, Marote P, Zahouani H, Tupin S, Mattei CP, Lantéri P. Mucoadhesion evaluation of polysaccharide gels for vaginal application by using rheological and indentation measurements. Colloids Surf B Biointerfaces 2012; 92:168-74. [DOI: 10.1016/j.colsurfb.2011.11.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Revised: 11/18/2011] [Accepted: 11/18/2011] [Indexed: 10/15/2022]
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45
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Gupta PN, Pattani A, Curran RM, Kett VL, Andrews GP, Morrow RJ, Woolfson AD, Malcolm RK. Development of liposome gel based formulations for intravaginal delivery of the recombinant HIV-1 envelope protein CN54gp140. Eur J Pharm Sci 2012; 46:315-22. [PMID: 22360941 DOI: 10.1016/j.ejps.2012.02.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Revised: 01/26/2012] [Accepted: 02/06/2012] [Indexed: 11/19/2022]
Abstract
Mucosally-administered vaccine strategies are widely investigated as a promising means of preventing HIV infection. This study describes the development of liposomal gel formulations, and novel lyophilised variants, comprising HIV-1 envelope glycoprotein, CN54gp140, encapsulated within neutral, positively charged or negatively charged liposomes. The CN54gp140 liposomes were evaluated for mean vesicle diameter, polydispersity, morphology, zeta potential and antigen encapsulation efficiency before being incorporated into hydroxyethyl cellulose (HEC) aqueous gel and subsequently lyophilised to produce a rod-shaped solid dosage form for practical vaginal application. The lyophilised liposome-HEC rods were evaluated for moisture content and redispersibility in simulated vaginal fluid. Since these rods are designed to revert to gel form following intravaginal application, mucoadhesive, mechanical (compressibility and hardness) and rheological properties of the reformed gels were evaluated. The liposomes exhibited good encapsulation efficiency and the gels demonstrated suitable mucoadhesive strength. The freeze-dried liposome-HEC formulations represent a novel formulation strategy that could offer potential as stable and practical dosage form.
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Affiliation(s)
- Prem N Gupta
- School of Pharmacy, The Queen's University of Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, United Kingdom.
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46
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Pliszczak D, Bourgeois S, Bordes C, Valour J, Mazoyer M, Orecchioni A, Nakache E, Lantéri P. Improvement of an encapsulation process for the preparation of pro- and prebiotics-loaded bioadhesive microparticles by using experimental design. Eur J Pharm Sci 2011; 44:83-92. [DOI: 10.1016/j.ejps.2011.06.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 06/15/2011] [Accepted: 06/19/2011] [Indexed: 11/27/2022]
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47
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Baloglu E, Karavana SY, Senyigit ZA, Hilmioglu-Polat S, Metin DY, Zekioglu O, Guneri T, Jones DS. In-situ gel formulations of econazole nitrate: preparation and in-vitro and in-vivo evaluation. ACTA ACUST UNITED AC 2011; 63:1274-82. [PMID: 21899542 DOI: 10.1111/j.2042-7158.2011.01315.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVES This study describes the in-situ gelling of econazole nitrate containing thermosensitive polymers composed of poloxamer 407 and 188 as a novel treatment platform for vaginal candidiasis. METHODS Aqueous thermosensitive formulations containing 1% of econazole nitrate and poloxamer 407 and/or 188 were prepared and their rheological, mechanical and drug-release properties determined at 20 ± 0.1°C and/or 37 ± 0.1°C. Based on their biologically suitable thermorheological properties, formulations containing the mixtures of poloxamer 407 and 188 in ratios of 15:15 (F1), 15:20 (F2) and 20:10 (F3) were chosen for comprehensive analysis. KEY FINDINGS Formulations based on F3 exhibited typical gel-type mechanical spectra (G' > G″) at 37°C whereas formulations based on F1 and F2 exhibited properties akin to weakly cross-linked gels. Texture profile analysis demonstrated that F3 showed the highest cohesiveness, adhesiveness, hardness and compressibility. No statistically significant differences (P > 0.5) were observed in the release of econazole nitrate from the formulations at pH 4.5, which in all cases followed anomalous diffusion kinetics. Formulations based on 20% poloxamer 407:10% poloxamer 188 were chosen for in-vivo studies and were shown to be effective for the treatment of the vaginal candidiasis. Histopathologic evaluation also supported the effectiveness of the thermosensitive formulation administered intravaginally. CONCLUSION By careful engineering of the rheological properties, in-situ thermosensitive gel formulations of econazole nitrate were prepared and were shown to be efficacious in the treatment of vaginal candidiasis.
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Affiliation(s)
- Esra Baloglu
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Ege University, Bornova, İzmir, Turkey.
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48
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Yu T, Malcolm K, Woolfson D, Jones DS, Andrews GP. Vaginal gel drug delivery systems: understanding rheological characteristics and performance. Expert Opin Drug Deliv 2011; 8:1309-22. [DOI: 10.1517/17425247.2011.600119] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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49
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Synergistic performance of cyclodextrin–agar hydrogels for ciprofloxacin delivery and antimicrobial effect. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.03.042] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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50
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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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