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Punyanitya S, Thiansem S, Raksanti A, Chankachang P, Koonawoot R. Preparation and characterization of glyceryl stearate/cassava starch composite for wax therapy. Int J Biol Macromol 2024; 261:129681. [PMID: 38272417 DOI: 10.1016/j.ijbiomac.2024.129681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 01/17/2024] [Accepted: 01/21/2024] [Indexed: 01/27/2024]
Abstract
Glyceryl stearate and cassava starch (CS) composites were prepared by an esterification process. Formulations containing starch at various concentrations were prepared, being 1, 1.5, 3, 5, 10, 15, 20, and 30 % by weight, respectively. The characteristics of pH, moisture content, FTIR, melting point, latent heat, thermal energy storage, and specific heat capacity of composites were elucidated. The optimal formulation contained 1 % w/w CS, this indicated that the composite was able to maintain its temperature for 9.4 ± 0.5 min, with a melting temperature of 51.9 ± 0.3 °C, solidification temperature of 36.1 ± 1.6 °C, latent heat of fusion of 120 ± 10 J/g, and latent heat of solidification of 126 ± 3 J/g, and specific heat capacity of 2.6 ± 0.2 J/g.K. New bonds were formed in the composite structure of glyceryl stearate and CS at these levels. The composite had a pH that was safe for contact with human skin and a moisture content that could be kept stable for a prolonged time. The innovation and the advantages of a composite materials: 1. The main components are derived from natural materials. 2. Costs effective 3. Sustainability 4. Safety, and 5. Efficacy. Therefore, composites have a high potential as are replacement for paraffin wax bath therapy.
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Affiliation(s)
| | - Sakdiphon Thiansem
- Department of Industrial Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Anucha Raksanti
- Science and Technology Research Institute, Chiang Mai University, Chiang Mai 50200, Thailand.
| | - Phanlob Chankachang
- Faculty of Management Science, Sakon Nakhon Rajabhat University, Sakon Nakhon 47000, Thailand.
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2
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Bercea M, Plugariu IA, Dinu MV, Pelin IM, Lupu A, Bele A, Gradinaru VR. Poly(Vinyl Alcohol)/Bovine Serum Albumin Hybrid Hydrogels with Tunable Mechanical Properties. Polymers (Basel) 2023; 15:4611. [PMID: 38232047 PMCID: PMC10708397 DOI: 10.3390/polym15234611] [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: 10/31/2023] [Revised: 11/26/2023] [Accepted: 11/29/2023] [Indexed: 01/19/2024] Open
Abstract
In this study, a new strategy was adopted for obtaining polymer/protein hybrid hydrogels with shape stability and tunable mechanical or rheological characteristics by using non-toxic procedures. A chemical network was created using a poly(vinyl alcohol)(PVA)/bovine serum albumin (BSA) mixture in aqueous solution in the presence of genipin and reduced glutathione (GSH). Then, a second physical network was formed through PVA after applying freezing/thawing cycles. In addition, the protein macromolecules formed intermolecular disulfide bridges in the presence of GSH. In these conditions, multiple crosslinked networks were obtained, determining the strengthening and stiffening into relatively tough porous hydrogels with tunable viscoelasticity and a self-healing ability. A SEM analysis evidenced the formation of networks with interconnected pores of sizes between 20 μm and 50 μm. The mechanical or rheological investigations showed that the hydrogels' strength and response in different conditions of deformation were influenced by the composition and crosslinking procedure. Thus, the dynamics of the hybrid hydrogels can be adjusted to mimic the viscoelastic properties of the native tissues. The dynamic water vapor-sorption ability, swelling behavior in an aqueous environment, and bioadhesive properties were also investigated and are discussed in this paper. The hybrid hydrogels with tunable viscoelasticity can be designed on request, and they are promising candidates for tissue engineering, bioinks, and wound dressing applications.
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Affiliation(s)
- Maria Bercea
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.-A.P.); (M.V.D.); (I.M.P.); (A.L.); (A.B.)
| | - Ioana-Alexandra Plugariu
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.-A.P.); (M.V.D.); (I.M.P.); (A.L.); (A.B.)
| | - Maria Valentina Dinu
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.-A.P.); (M.V.D.); (I.M.P.); (A.L.); (A.B.)
| | - Irina Mihaela Pelin
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.-A.P.); (M.V.D.); (I.M.P.); (A.L.); (A.B.)
| | - Alexandra Lupu
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.-A.P.); (M.V.D.); (I.M.P.); (A.L.); (A.B.)
| | - Adrian Bele
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.-A.P.); (M.V.D.); (I.M.P.); (A.L.); (A.B.)
| | - Vasile Robert Gradinaru
- Faculty of Chemistry, Alexandru Ioan Cuza University of Iasi, 11 Carol I Bd., 700506 Iasi, Romania;
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3
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Jones DS, Yu T, Li S, Pick L, Andrews GP. A new mathematical model derived from transient (creep) analysis to estimate the vaginal retention of semi-solid dosage forms. Int J Pharm 2023; 632:122521. [PMID: 36563794 DOI: 10.1016/j.ijpharm.2022.122521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 12/10/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022]
Abstract
The performance of vaginal drug delivery systems is dependent on their retention. This study presents a novel mathematical method to estimate the vaginal retention of semi-solids. Using creep analysis, the elastic and residual compliances are determined from the discrete retardation spectrum and used to determine the retention times (RT), defined as the time required for the formulations to enter the terminal viscous zone of deformation and hence flow. RT of commercially available products (CAP) and selected prototype formulations were determined, the estimated RT of CAP broadly aligning with their prescribed clinical usage. Candidate formulations composed of hydroxyethylcellulose (HEC, 3%/5%w/w) and polyacrylic acid (PAA, 1%/3%w/w) were manufactured using, and further diluted with simulant vaginal fluid (SVF) or simulant seminal fluid (SSF) and their RT subsequently determined. Increasing polymer concentration and pH enhanced the estimated RT whereas dilution reduced RT. Notably, the formulation composed of 5%HEC/3% PAA (SSF) maintained its RT on dilution due to swelling of suspended PAA particles, thus representing a strategy to develop vaginal semi-solids that are resistant to dilution and hence removal. The mathematical model described is reproducible, straightforward to use and is recommended as a tool in formulation development to estimate the retention of vaginal semi-solids.
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Affiliation(s)
- David S Jones
- School of Pharmacy, The Queen's University of Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, United Kingdom.
| | - Tao Yu
- School of Pharmacy, The Queen's University of Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, United Kingdom
| | - Shu Li
- School of Pharmacy, The Queen's University of Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, United Kingdom
| | - Louise Pick
- School of Mechanical and Aerospace Engineering, Stranmillis Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
| | - Gavin P Andrews
- 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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Santos KP, Rodero CF, Ribeiro CM, Gremião MPD, Peccinini RG, Pavan FR, Pearce C, Gonzalez-Juarrero M, Chorilli M. Development of a Mucoadhesive Liquid Crystal System for the Administration of Rifampicin Applicable in Tuberculosis Therapy. LIFE (BASEL, SWITZERLAND) 2022; 12:life12081138. [PMID: 36013317 PMCID: PMC9409883 DOI: 10.3390/life12081138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 07/18/2022] [Accepted: 07/22/2022] [Indexed: 12/03/2022]
Abstract
Since 1966, rifampicin (RIF) has been considered one of the most potent drugs in the treatment of tuberculosis (TB), which is caused by infection with M. tuberculosis (Mtb). New nanostructured formulations for RIF delivery and alternative routes of administration have been studied as potential forms of treatment. This study evaluates a liquid crystal system for RIF delivery, using alternative drug delivery routes. The systems developed are composed of surfactant, oleylamine, and soy phosphatidylcholine. With the aid of polarized light microscopy, it was possible to determine that the developed systems had a hexagonal mesophase. All systems developed showed non-Newtonian pseudoplasticity and a high degree of thixotropy. Liquid crystal systems with RIF showed an increase in elastic potential, indicating greater mu-coadhesiveness. The evaluation of mucoadhesive forces revealed an increase in the mucoadhesive potential in the presence of mucus, indicating the presence of satisfactory mucoadhesive forces. The 9DR and 10DR liquid crystal systems, when submitted to Differential Scanning Calorimetry analysis, remained structured even at temperatures above 100 °C, showing excellent stability. The developed liquid crystal systems showed a tolerable degree of cytotoxicity and bactericidal potential, for example, the 9DR system demonstrated a reduction in bacterial load after the third day and reached zero CFU on the seventh day of the test. The developed systems were also evaluated in the preclinical model of Mtb-infected mice, using the nasal, sublingual, and cutaneous route for the delivery of RIF associated with a nanostructured liquid crystal system as a possible tool in the treatment of TB.
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Affiliation(s)
- Kaio Pini Santos
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, Brazil; (C.F.R.); (M.P.D.G.); (M.C.)
- Correspondence:
| | - Camila Fernanda Rodero
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, Brazil; (C.F.R.); (M.P.D.G.); (M.C.)
| | - Camila Maríngolo Ribeiro
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, Brazil; (C.M.R.); (R.G.P.); (F.R.P.)
| | - Maria P. D. Gremião
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, Brazil; (C.F.R.); (M.P.D.G.); (M.C.)
| | - Rosângela Gonçalves Peccinini
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, Brazil; (C.M.R.); (R.G.P.); (F.R.P.)
| | - Fernando Rogerio Pavan
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, Brazil; (C.M.R.); (R.G.P.); (F.R.P.)
| | - Camron Pearce
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology & Pathology, Colorado State University, Fort Collins, CO 80523, USA; (C.P.); (M.G.-J.)
| | - Mercedes Gonzalez-Juarrero
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology & Pathology, Colorado State University, Fort Collins, CO 80523, USA; (C.P.); (M.G.-J.)
| | - Marlus Chorilli
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, Brazil; (C.F.R.); (M.P.D.G.); (M.C.)
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5
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Borghi-Pangoni FB, Bassi da Silva J, Dos Santos RS, Trevisan AP, Hott FCDC, Gonçalves MC, Kobayashi RK, de Souza MVF, Consolaro MEL, Castro-Hoshino LVD, Baesso ML, Bruschi ML. Thermosensitive gel based on cellulose derivative for topical delivery of propolis in acne treatment. Pharm Dev Technol 2022; 27:490-501. [PMID: 35587564 DOI: 10.1080/10837450.2022.2080221] [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: 10/18/2022]
Abstract
Thermosensitive bioadhesive formulations can display increased retention time, skin permeation, and improve the topical therapy of many drugs. Acne is an inflammatory process triggered by several factors like the proliferation of the bacteria Propionibacterium acnes. Aiming a new alternative treatment with a natural source, propolis displays great potential due to its antibiotic, anti-inflammatory and healing properties. This study describes the development of bioadhesive thermoresponsive platform with cellulose derivatives and poloxamer 407 for propolis skin delivery. Propolis ethanolic extract (PES) was added to the formulations with sodium carboxymethylcellulose (CMC) or hydroxypropyl methylcellulose (HPMC) and poloxamer 407 (Polox). The formulations were characterized as rheology, bioadhesion and mechanical analysis. The selected formulations were investigated as in vitro propolis release, cytotoxicity, ex vivo skin permeation by Fourier Transform Infrared Photoacoustic Spectroscopy, and the activity against P. acnes. Formulations showed suitable sol-gel transition temperature, shear-thinning behavior and texture profile. CMC presence decreased cohesiveness and adhesiveness of formulations. Polox/HPMC/PES system displayed less cytotoxicity, modified propolis release governed by anomalous transport, skin permeation and activity against P. acnes. These results indicate important advantages in the topical treatment of acne and suggest a potential formulation for clinical evaluation.
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Affiliation(s)
- Fernanda Belincanta Borghi-Pangoni
- Laboratory of Research and Development of Drug Delivery Systems, Postgraduate Program in Pharmaceutical Sciences, Department of Pharmacy, State University of Maringa, 87020-900, Maringa, Parana, 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, 87020-900, Maringa, Parana, Brazil
| | - Rafaela Said Dos Santos
- Laboratory of Research and Development of Drug Delivery Systems, Postgraduate Program in Pharmaceutical Sciences, Department of Pharmacy, State University of Maringa, 87020-900, Maringa, Parana, Brazil
| | - Ana Paula Trevisan
- Laboratory of Research and Development of Drug Delivery Systems, Postgraduate Program in Pharmaceutical Sciences, Department of Pharmacy, State University of Maringa, 87020-900, Maringa, Parana, Brazil
| | - Francyelle Carolyne de Castro Hott
- Laboratory of Research and Development of Drug Delivery Systems, Postgraduate Program in Pharmaceutical Sciences, Department of Pharmacy, State University of Maringa, 87020-900, Maringa, Parana, Brazil
| | - Marcelly Chue Gonçalves
- Laboratory of basic and applied bacteriology NIP3, Department of Microbiology, Center of Biological Sciences, State University of Londrina, 86057-970, Londrina, Parana, Brazil
| | - Renata KatsukoTakayama Kobayashi
- Laboratory of basic and applied bacteriology NIP3, Department of Microbiology, Center of Biological Sciences, State University of Londrina, 86057-970, Londrina, Parana, Brazil
| | - Maria Vitória Felipe de Souza
- Laboratory of Clinical Cytology, building B09, Department of Clinical Analysis, Center of Health Sciences, State University of Maringa, 87020-900, Maringa, Parana, Brazil
| | - Marcia Edilaine Lopes Consolaro
- Laboratory of Clinical Cytology, building B09, Department of Clinical Analysis, Center of Health Sciences, State University of Maringa, 87020-900, Maringa, Parana, Brazil
| | | | - Mauro Luciano Baesso
- Postgraduate Program in Physics, Department of Physics, State University of Maringa, 87020-900, Maringa, Parana, Brazil
| | - Marcos Luciano Bruschi
- Laboratory of Research and Development of Drug Delivery Systems, Postgraduate Program in Pharmaceutical Sciences, Department of Pharmacy, State University of Maringa, 87020-900, Maringa, Parana, Brazil
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6
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Sulejmani E, Boran O, Huppertz T, Hayaloglu A. Rheology, microstructure and sensory properties of low-fat milk jam: Influence of inulin type, sucrose content, sodium bicarbonate and calcium chloride. Int Dairy J 2021. [DOI: 10.1016/j.idairyj.2021.105162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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7
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Sulejmani EI, Boran OS, Coşkun A, Hayaloglu AA. Physicochemical, sensorial and rheological characterisation of whole‐fat or low‐fat milk jams as influenced by calcium chloride, sodium bicarbonate and sucrose content. Int J Food Sci Technol 2021. [DOI: 10.1111/ijfs.15239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Erhan I. Sulejmani
- Department of Food Technology Faculty of Food Technology and Nutrition University of Tetova Tetovo 1200 North Macedonia
| | - Osman S. Boran
- Department of Food Engineering Inonu University 44280 Malatya Turkey
| | - Aysegul Coşkun
- Department of Chemical Engineering Inonu University 44280 Malatya Turkey
| | - Ali A. Hayaloglu
- Department of Food Engineering Inonu University 44280 Malatya Turkey
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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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Simões A, Miranda M, Cardoso C, Veiga F, Vitorino C. Rheology by Design: A Regulatory Tutorial for Analytical Method Validation. Pharmaceutics 2020; 12:pharmaceutics12090820. [PMID: 32872221 PMCID: PMC7558587 DOI: 10.3390/pharmaceutics12090820] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 08/25/2020] [Accepted: 08/25/2020] [Indexed: 01/09/2023] Open
Abstract
The increasing demand for product and process understanding as an active pursuit in the quality guideline Q8 and, more recently, on the draft guideline on quality and equivalence of topical products, has unveiled the tremendous potential of rheology methods as a tool for microstructure characterization of topical semisolid dosage forms. Accordingly, procedure standardization is a dire need. This work aimed at developing and validating a methodology tutorial for rheology analysis. A 1% hydrocortisone cream was used as model cream formulation. Through a risk assessment analysis, the impact of selected critical method variables (geometry, temperature and application mode) was estimated in a broad range of rheological critical analytical attributes-zero-shear viscosity, upper-shear thinning viscosity, lower-shear thinning viscosity, infinite-shear viscosity, rotational yield point, thixotropic relative area, linear viscoelastic region, oscillatory yield point, storage modulus, loss modulus, and loss tangent. The proposed validation of the approach included the rheometer qualification, followed by the validation of numerous operational critical parameters regarding a rheology profile acquisition. The thixotropic relative area, oscillatory yield point, flow point and viscosity related endpoints proved to be highly sensitive and discriminatory parameters. This rationale provided a standard framework for the development of a reliable and robust rheology profile acquisition.
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Affiliation(s)
- Ana Simões
- Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; (A.S.); (M.M.); (F.V.)
- Associated Laboratory for Green Chemistry of the Network of Chemistry and Technology (LAQV. REQUIMTE) Group of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Margarida Miranda
- Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; (A.S.); (M.M.); (F.V.)
- Coimbra Chemistry Center, Department of Chemistry, University of Coimbra, Rua Larga, 3004-535 Coimbra, Portugal
| | - Catarina Cardoso
- Laboratórios Basi, Mortágua, Parque Industrial Manuel Lourenço Ferreira, lote 15, 3450-232 Mortágua, Portugal;
| | - Francisco Veiga
- Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; (A.S.); (M.M.); (F.V.)
- Associated Laboratory for Green Chemistry of the Network of Chemistry and Technology (LAQV. REQUIMTE) Group of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Carla Vitorino
- Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; (A.S.); (M.M.); (F.V.)
- Coimbra Chemistry Center, Department of Chemistry, University of Coimbra, Rua Larga, 3004-535 Coimbra, Portugal
- Centre for Neurosciences and Cell Biology (CNC), University of Coimbra, Rua Larga, Faculty of Medicine, Pólo I, 1st floor, 3004-504 Coimbra, Portugal
- Correspondence: ; Tel.: +351-239-488-400
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Nova MV, Nothnagel L, Thurn M, Travassos PB, Herculano LS, Bittencourt PR, Novello CR, Bazotte RB, Wacker MG, Bruschi ML. Development study of pectin/Surelease® solid microparticles for the delivery of L-alanyl-L-glutamine dipeptide. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2018.11.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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11
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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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12
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de Alcântara Sica de Toledo L, Rosseto HC, dos Santos RS, Spizzo F, Del Bianco L, Montanha MC, Esposito E, Kimura E, Bonfim-Mendonça PDS, Svidzinski TIE, Cortesi R, Bruschi ML. Thermal Magnetic Field Activated Propolis Release From Liquid Crystalline System Based on Magnetic Nanoparticles. AAPS PharmSciTech 2018; 19:3258-3271. [PMID: 30209790 DOI: 10.1208/s12249-018-1163-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 08/23/2018] [Indexed: 12/30/2022] Open
Abstract
Intra-periodontal pocket drug delivery systems, such as liquid crystalline systems, are widely utilized improving the drug release control and the therapy. Propolis is used in the treatment of periodontal diseases, reducing the inflammatory and infectious conditions. Iron oxide magnetic nanoparticles (MNPs) can improve the treatment when an alternating external magnetic field (AEMF) is applied, increasing the local temperature. The aim of this study was to develop a liquid crystalline system containing MNPs for intra-periodontal pocket propolis release. MNPs were prepared using iron salts and the morphological, size, thermal, x-ray diffraction, magnetometry, and Mössbauer spectroscopy analyses were performed. Cytotoxicity studies using Artemia salina and fibroblasts were also accomplished. The systems were prepared using polyoxyethylene (10) oleyl ether, isopropyl myristate, purified water, and characterized by polarized optical microscopy, rheometry, and in vitro drug release profile using a periodontal pocket simulator apparatus. The antifungal activity of the systems was investigated against Candida spp. using an AEMF. MNPs displayed nanometric size, were monodisperse, and they displayed very low cytotoxicity. Microscopically homogeneous formulations were obtained displaying important physicochemical and biological properties. The system displayed prolonged release of propolis and important in vitro fungicide activity, which was increased when the AEMF was applied, indicating a potentially alternative therapy for the treatment of the periodontal disease.
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Hamed R, AbuRezeq A, Tarawneh O. Development of hydrogels, oleogels, and bigels as local drug delivery systems for periodontitis. Drug Dev Ind Pharm 2018; 44:1488-1497. [PMID: 29669437 DOI: 10.1080/03639045.2018.1464021] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Periodontal disease is a chronic inflammation of gum and tissues that surround and support the teeth. Nonsteroidal anti-inflammatory drugs (NSAIDs) can be used in the treatment of periodontitis to ease swelling and inflammation. One approach of treating periodontitis is loading the NSAIDs in local drug delivery systems. Therefore, the objective of this study was to investigate the local delivery of the NSAIDs model drug ibuprofen to treat periodontitis using different types of gel formulations (hydrogel, oleogel, and bigel). Gel formulations were characterized in terms of their rheological properties (flow behavior, viscoelastic, and bioadhesive properties) using a controlled-stress rheometer. The in vitro drug release of ibuprofen from gel formulations was investigated using Franz diffusion cells. Gels exhibited more solid-like (elastic) behavior. The viscosity and viscoelastic properties were in the order of oleogel > bigel > hydrogel, respectively. In bioadhesion study, mucin dispersion/plain ibuprofen-hydrogel mixture showed a frequency-dependent interaction of ΔG' = -31 and ΔG' = + 53 Pa at 1 and 10 rad/s, respectively. A strong positive interaction (ΔG' = + 6000 and +130,667 Pa at 1 and 10 rad/s, respectively) was found in mucin dispersion/plain ibuprofen-oleogel mixture. The extent of the negative interaction increased in mucin dispersion/plain ibuprofen-bigel mixture (ΔG' = -59,000 and -79,375 Pa at 1 and 10 rad/s, respectively). After 6 h, ibuprofen release from hydrogel, oleogel, and bigel was 59.5 ± 2.2, 80.6 ± 3.9, and 94.6 ± 3.2%, respectively. Results showed that the rheological and bioadhesive properties and in vitro drug release were influenced by the type of gel formulations.
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Affiliation(s)
- Rania Hamed
- a Department of Pharmacy, Faculty of Pharmacy , Al-Zaytoonah University of Jordan , Amman , Jordan
| | - Ala'a AbuRezeq
- a Department of Pharmacy, Faculty of Pharmacy , Al-Zaytoonah University of Jordan , Amman , Jordan
| | - Ola Tarawneh
- a Department of Pharmacy, Faculty of Pharmacy , Al-Zaytoonah University of Jordan , Amman , Jordan
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Gupta A, Govila V, Pant VA, Gupta R, Verma UP, Ahmad H, Mohan S. A randomized controlled clinical trial evaluating the efficacy of zoledronate gel as a local drug delivery system in the treatment of chronic periodontitis: A clinical and radiological correlation. Natl J Maxillofac Surg 2018; 9:22-32. [PMID: 29937655 PMCID: PMC5996659 DOI: 10.4103/njms.njms_12_18] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Background This study aimed to evaluate the efficacy of local drug delivery system of zoledronate (ZLN) gel as an adjunct to scaling and root planing (SRP) for the treatment of human periodontal intrabony defects clinically and radiographically. Materials and Methods Forty intrabony defects (three walled and combined defects without involving furcation) in moderate to severely affected forty chronic periodontitis patients (range, 30-50 years) were randomly divided into two groups and treated either with 0.05% ZLN gel (ZLN n = 20; 1 dropout) or placebo gel (control group [CG] n = 20) after SRP. Clinical parameters such as plaque index (PI), gingival index (GI), tooth-specific pocket probing depth (Ts PPD), and clinical attachment levels (TsCAL) were assessed at baseline and at 3 and 6 months using occlusal acrylic stent. Radiographic parameters were assessed at baseline and 6 months, utilizing "ONIS 2.5 PROFESSIONAL" and "SYNGO" software compatible with DentaScan to measure the volumetric bone changes in intrabony defects. Results In intragroup comparisons, both groups showed significant PI and GI reduction (P < 0.001) after treatment at 3 and 6 months. In intergroup comparisons, Ts PPD reduction and Ts CAL gain were significant only in ZLN at 6 months from both baseline and 3 months. Radiographically, significant reduction in defect depth and buccolingual width with volumetric defect gain of 40.24% ± 7.44% in ZLN compared to insignificant gain of 1.60% ± 4.06% in CG was observed at 6 months. Conclusion ZLN gel applied subgingivally in intrabony defects resulted in significant improvements both clinically and radiographically.
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Affiliation(s)
- Abhaya Gupta
- Department of Periodontology, Faculty of Dental Sciences, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Vivek Govila
- Department of Periodontology, Babu Banarasi Das College of Dental Sciences, Babu Banarasi Das University, Lucknow, Uttar Pradesh, India
| | - Vandana A Pant
- Department of Periodontology, Babu Banarasi Das College of Dental Sciences, Babu Banarasi Das University, Lucknow, Uttar Pradesh, India
| | - Rajiv Gupta
- Department of Pharmacognosy, Faculty of Pharmacy, Babu Banarasi Das National Institute of Technology and Management, Babu Banarasi Das University, Lucknow, Uttar Pradesh, India
| | - Umesh P Verma
- Department of Periodontology, Faculty of Dental Sciences, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Hafsa Ahmad
- Division of Pharmaceutics, Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Sumedha Mohan
- Department of Periodontology, Babu Banarasi Das College of Dental Sciences, Babu Banarasi Das University, Lucknow, Uttar Pradesh, India
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Sharma A, Raman A, Pradeep AR. Role of 1% alendronate gel as adjunct to mechanical therapy in the treatment of chronic periodontitis among smokers. J Appl Oral Sci 2017; 25:243-249. [PMID: 28678942 PMCID: PMC5482246 DOI: 10.1590/1678-7757-2016-0201] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 08/22/2016] [Indexed: 02/06/2023] Open
Abstract
Objective Alendronate (ALN) inhibits osteoclastic bone resorption and triggers osteostimulative properties both in vivo and in vitro, as shown by increase in matrix formation. This study aimed to explore the efficacy of 1% ALN gel as local drug delivery (LDD) in adjunct to scaling and root planing (SRP) for the treatment of chronic periodontitis among smokers. Material and Methods 75 intrabony defects were treated in 46 male smokers either with 1% ALN gel or placebo gel. ALN gel was prepared by adding ALN into carbopol-distilled water mixture. Clinical parameters [modified sulcus bleeding index, plaque index, probing depth (PD), and periodontal attachment level (PAL)] were recorded at baseline, at 2 months, and at 6 months, while radiographic parameters were recorded at baseline and at 6 months. Defect fill at baseline and at 6 months was calculated on standardized radiographs by using the image analysis software. Results Mean PD reduction and mean PAL gain were found to be greater in the ALN group than in the placebo group, both at 2 and 6 months. Furthermore, a significantly greater mean percentage of bone fill was found in the ALN group (41.05±11.40%) compared to the placebo group (2.5±0.93%). Conclusions The results of this study showed 1% ALN stimulated a significant increase in PD reduction, PAL gain, and an improved bone fill compared to placebo gel in chronic periodontitis among smokers. Thus, 1% ALN, along with SRP, is effective in the treatment of chronic periodontitis in smokers.
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Affiliation(s)
| | | | - Avani Raju Pradeep
- Government Dental College and Research Institute, Department of Periodontics, Bangalore, Karnataka, India
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Jones DKF, Andrews GP, Jones DS. Strontium-containing, carbohydrate-based polymer networks as tooth-adherent systems for the treatment of dentine hypersensitivity. Carbohydr Polym 2017; 157:400-408. [PMID: 27987944 DOI: 10.1016/j.carbpol.2016.09.066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Revised: 09/20/2016] [Accepted: 09/20/2016] [Indexed: 11/27/2022]
Abstract
This study describes the design/physicochemical properties of strontium-containing, mucoadhesive carbohydrate polymeric platforms, designed as treatments for dentine hypersensitivity. Interactive networks were composed of strontium chloride (10% w/w), one of two base polymers (sodium carboxymethylcellulose, NaCMC or hydroxyethylcellulose, HEC), polycarbophil (PC) and, when required, polyvinylpyrrolidone (PVP). The physicochemical properties were characterised using oscillatory and flow rheometry, texture profile analysis, mucoadhesion analysis and, additionally, the strontium release properties were examined. All platforms exhibited pseudoplastic flow. Increasing polymer concentrations increased network viscoelasticity, consistency, hardness, compressibility, gel strength, adhesiveness, mucoadhesion and, retarded strontium release. Principally zero-order strontium release was observed from all platforms. Incorporation of strontium reduced the network elasticity, consistency, hardness, compressibility, gel strength and mucoadhesion; HEC-based platforms being affected to a greater extent than NaCMC platforms. NaCMC-based platforms containing 10% strontium chloride, PVP (3% w/w) and PC (3% w/w) potentially displayed the correct balance of physicochemical properties for the treatment of dentine sensitivity.
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Affiliation(s)
- Dary K F Jones
- School of Pharmacy, Queen's University of Belfast, Belfast, Antrim, Northern Ireland, UK
| | - Gavin P Andrews
- School of Pharmacy, Queen's University of Belfast, Belfast, Antrim, Northern Ireland, UK
| | - David S Jones
- School of Pharmacy, Queen's University of Belfast, Belfast, Antrim, Northern Ireland, UK.
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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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18
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Statistical modelling of the rheological and mucoadhesive properties of aqueous poly(methylvinylether-co-maleic acid) networks: Redefining biomedical applications and the relationship between viscoelasticity and mucoadhesion. Colloids Surf B Biointerfaces 2016; 144:125-134. [DOI: 10.1016/j.colsurfb.2016.03.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 02/29/2016] [Accepted: 03/02/2016] [Indexed: 11/30/2022]
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Jiang B, Hom WL, Chen X, Yu P, Pavelka LC, Kisslinger K, Parise JB, Bhatia SR, Grubbs RB. Magnetic Hydrogels from Alkyne/Cobalt Carbonyl-Functionalized ABA Triblock Copolymers. J Am Chem Soc 2016; 138:4616-25. [PMID: 26958699 DOI: 10.1021/jacs.6b01271] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A series of alkyne-functionalized poly(4-(phenylethynyl)styrene)-block-poly(ethylene oxide)-block-poly(4-(phenylethynyl)styrene) (PPES-b-PEO-b-PPES) ABA triblock copolymers was synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. PESn[Co2(CO)6]x-EO800-PESn[Co2(CO)6]x ABA triblock copolymer/cobalt adducts (10-67 wt % PEO) were subsequently prepared by reaction of the alkyne-functionalized PPES block with Co2(CO)8 and their phase behavior was studied by TEM. Heating triblock copolymer/cobalt carbonyl adducts at 120 °C led to cross-linking of the PPES/Co domains and the formation of magnetic cobalt nanoparticles within the PPES/Co domains. Magnetic hydrogels could be prepared by swelling the PEO domains of the cross-linked materials with water. Swelling tests, rheological studies and actuation tests demonstrated that the water capacity and modulus of the hydrogels were dependent upon the composition of the block copolymer precursors.
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Affiliation(s)
- Bingyin Jiang
- Department of Chemistry, Stony Brook University , Stony Brook, New York 11794-3400, United States
| | - Wendy L Hom
- Department of Chemistry, Stony Brook University , Stony Brook, New York 11794-3400, United States
| | - Xianyin Chen
- Department of Chemistry, Stony Brook University , Stony Brook, New York 11794-3400, United States
| | - Pengqing Yu
- Department of Chemistry, Stony Brook University , Stony Brook, New York 11794-3400, United States
| | - Laura C Pavelka
- Department of Chemistry, Stony Brook University , Stony Brook, New York 11794-3400, United States
| | - Kim Kisslinger
- Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States
| | - John B Parise
- Department of Chemistry, Stony Brook University , Stony Brook, New York 11794-3400, United States.,Department of Geosciences, Stony Brook University , Stony Brook, New York 11794-2100, United States
| | - Surita R Bhatia
- Department of Chemistry, Stony Brook University , Stony Brook, New York 11794-3400, United States
| | - Robert B Grubbs
- Department of Chemistry, Stony Brook University , Stony Brook, New York 11794-3400, United States
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Andrews GP, Laverty TP, Jones DS. Rheological Analysis of Polymer Interactions and Ageing of Poly(Methylvinylether-Co-Maleic Anhydride)/Poly(Vinyl Alcohol) Binary Networks and Their Effects on Mucoadhesion. J Pharm Sci 2015; 104:4329-4338. [DOI: 10.1002/jps.24679] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Revised: 08/22/2015] [Accepted: 08/26/2015] [Indexed: 11/11/2022]
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21
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Screening and In Vitro Evaluation of Mucoadhesive Thermoresponsive System Containing Methylene Blue for Local Photodynamic Therapy of Colorectal Cancer. Pharm Res 2015; 33:776-91. [DOI: 10.1007/s11095-015-1826-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 11/03/2015] [Indexed: 12/22/2022]
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Boopathy M, Subramanian K. Preparation of Polycyclic Pendant Chalcone Moiety Based Antimicrobial Polyacrylamides. ADVANCES IN POLYMER TECHNOLOGY 2015. [DOI: 10.1002/adv.21606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Mani Boopathy
- Department of chemistry; Anna University; Chennai 600 025 India
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Singh V, Pal K, Banerjee I, Pramanik K, Anis A, Al-Zahrani S. Novel organogel based lyotropic liquid crystal physical gels for controlled delivery applications. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.05.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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24
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Villanova J, Ayres E, Oréfice R. Design, characterization and preliminary in vitro evaluation of a mucoadhesive polymer based on modified pectin and acrylic monomers with potential use as a pharmaceutical excipient. Carbohydr Polym 2015; 121:372-81. [DOI: 10.1016/j.carbpol.2014.12.052] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Revised: 12/17/2014] [Accepted: 12/18/2014] [Indexed: 12/23/2022]
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25
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Sagiri S, Singh VK, Pal K, Banerjee I, Basak P. Stearic acid based oleogels: A study on the molecular, thermal and mechanical properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 48:688-99. [DOI: 10.1016/j.msec.2014.12.018] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 11/01/2014] [Accepted: 12/05/2014] [Indexed: 11/17/2022]
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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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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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Singh VK, Pal K, Pradhan DK, Pramanik K. Castor oil and sorbitan monopalmitate based organogel as a probable matrix for controlled drug delivery. J Appl Polym Sci 2013. [DOI: 10.1002/app.39315] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Vinay K. Singh
- Department of Biotechnology and Medical Engineering; National Institute of Technology; Rourkela; 769008; India
| | - Kunal Pal
- Department of Biotechnology and Medical Engineering; National Institute of Technology; Rourkela; 769008; India
| | - Dillip K. Pradhan
- Department of Physics; National Institute of Technology; Rourkela; 769008; India
| | - Krishna Pramanik
- Department of Biotechnology and Medical Engineering; National Institute of Technology; Rourkela; 769008; India
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De Araújo Pereira RR, Godoy JSR, Svidzinski TIS, Bruschi ML. Preparation and Characterization of Mucoadhesive Thermoresponsive Systems Containing Propolis for the Treatment of Vulvovaginal Candidiasis. J Pharm Sci 2013; 102:1222-34. [DOI: 10.1002/jps.23451] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 12/19/2012] [Accepted: 01/03/2012] [Indexed: 11/09/2022]
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Arduino P, Carbone M, Della Ferrera F, Elia A, Conrotto D, Gambino A, Comba A, Calogiuri P, Broccoletti R. Pimecrolimus vs. tacrolimus for the topical treatment of unresponsive oral erosive lichen planus: a 8 week randomized double-blind controlled study. J Eur Acad Dermatol Venereol 2013; 28:475-82. [DOI: 10.1111/jdv.12128] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Accepted: 02/04/2013] [Indexed: 12/17/2022]
Affiliation(s)
- P.G. Arduino
- Department of Surgical Sciences; Oral Medicine Section; University of Turin; Turin Italy
| | - M. Carbone
- Department of Surgical Sciences; Oral Medicine Section; University of Turin; Turin Italy
| | - F. Della Ferrera
- Department of Surgical Sciences; Oral Medicine Section; University of Turin; Turin Italy
| | - A. Elia
- Department of Surgical Sciences; Oral Medicine Section; University of Turin; Turin Italy
| | - D. Conrotto
- Department of Surgical Sciences; Oral Medicine Section; University of Turin; Turin Italy
| | - A. Gambino
- Department of Surgical Sciences; Oral Medicine Section; University of Turin; Turin Italy
| | - A. Comba
- Department of Surgical Sciences; Oral Medicine Section; University of Turin; Turin Italy
| | - P.L. Calogiuri
- Department of Surgical Sciences; Oral Medicine Section; University of Turin; Turin Italy
| | - R. Broccoletti
- Department of Surgical Sciences; Oral Medicine Section; University of Turin; Turin Italy
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Pradeep A, Kumari M, Rao NS, Naik SB. 1% Alendronate Gel as Local Drug Delivery in the Treatment of Class II Furcation Defects: A Randomized Controlled Clinical Trial. J Periodontol 2013; 84:307-15. [DOI: 10.1902/jop.2012.110729] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Barbre Pedersen P, Pajander J, Müllertz A, Vilmann P, Jørgensen L, Baldursdottir S. Towards the understanding of complex fluids in pharmaceutical sciences. J Drug Deliv Sci Technol 2013. [DOI: 10.1016/s1773-2247(13)50056-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Sagiri SS, Behera B, Pal K, Basak P. Lanolin-based organogels as a matrix for topical drug delivery. J Appl Polym Sci 2012. [DOI: 10.1002/app.38590] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Perez AP, Mundiña-Weilenmann C, Romero EL, Morilla MJ. Increased brain radioactivity by intranasal P-labeled siRNA dendriplexes within in situ-forming mucoadhesive gels. Int J Nanomedicine 2012; 7:1373-85. [PMID: 22457595 PMCID: PMC3310412 DOI: 10.2147/ijn.s28261] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Molecules taken up by olfactory and trigeminal nerve neurons directly access the brain by the nose-to-brain pathway. In situ-forming mucoadhesive gels would increase the residence time of intranasal material, favoring the nose-to-brain delivery. In this first approach, brain radioactivity after intranasal administration of (32)P-small interference RNA (siRNA) complexed with poly(amidoamine) G7 dendrimers (siRNA dendriplexes) within in situ-forming mucoadhesive gels, was determined. MATERIALS (32)P-siRNA dendriplexes were incorporated into in situ-forming mucoadhesive gels prepared by blending thermosensitive poloxamer (23% w/w) with mucoadhesive chitosan (1% w/w, PxChi) or carbopol (0.25% w/w, PxBCP). Rheological properties, radiolabel release profile, and local toxicity in rat nasal mucosa were determined. The best-suited formulation was intranasally administered to rats, and blood absorption and brain distribution of radioactivity were measured. RESULTS The gelation temperature of both formulations was 23°C. The PxChi liquid showed non-Newtonian pseudoplastic behavior of high consistency and difficult manipulation, and the gel retained 100% of radiolabel after 150 minutes. The PxCBP liquid showed a Newtonian behavior of low viscosity and easy manipulation, while in the gel phase showed apparent viscosity similar to that of the mucus but higher than that of aqueous solution. The gel released 35% of radiolabel and the released material showed silencing activity in vitro. Three intranasal doses of dendriplexes in PxCBP gel did not damage the rat nasal mucosa. A combination of (32)P-siRNA complexation with dendrimers, incorporation of the dendriplexes into PxCBP gel, and administration of two intranasal doses was necessary to achieve higher brain radioactivity than that achieved by intravenous dendriplexes or intranasal naked siRNA. CONCLUSION The increased radioactivity within the olfactory bulb suggested that the combination above mentioned favored the mediation of a direct brain delivery.
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Affiliation(s)
- Ana Paula Perez
- Programa de Nanomedicinas, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Saenz Peña 352, Bernal, Buenos Aires, Argentina
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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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Pradeep AR, Sharma A, Rao NS, Bajaj P, Naik SB, Kumari M. Local drug delivery of alendronate gel for the treatment of patients with chronic periodontitis with diabetes mellitus: a double-masked controlled clinical trial. J Periodontol 2012; 83:1322-8. [PMID: 22264208 DOI: 10.1902/jop.2012.110292] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND Alendronate (ALN) increases alveolar bone density with systemic use and, has been found to increase bone formation on local delivery into the periodontal pocket. The purpose of the present study is to explore the efficacy of 1% ALN gel as a local drug delivery system in adjunct to scaling and root planing (SRP) for the treatment of intrabony defects in patients with chronic periodontitis (CP) with type 2 diabetes (DM) compared to a placebo gel. METHODS Seventy intrabony defects were treated with either 1% ALN or placebo gel. Clinical parameters were recorded at baseline, 2 months, and 6 months. Radiographic parameters were recorded at baseline and 6 months. Defect fill at baseline and 6 months was calculated on standardized radiographs using image analysis software. RESULTS Mean probing depth (PD) reduction and mean clinical attachment level (CAL) gain was greater in the ALN group than the placebo group at both 2 and 6 months. Furthermore, significantly greater mean percentage of bone fill was found in the ALN group (44.2% ± 11.78%) compared to the placebo group (2.8% ± 1.61%). CONCLUSIONS In patients with type 2 DM and CP, local delivery of 1% ALN into periodontal pockets resulted in a significant increase in the PD reduction, CAL gain, and improved bone fill compared to placebo gel as an adjunct to SRP. Thus, ALN can be used as an adjunct to SRP to provide a new dimension in the periodontal therapy in the near future.
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Affiliation(s)
- A R Pradeep
- Department of Periodontics, Government Dental College and Research Institute, Bangalore, Karnataka, India.
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Sharma A, Pradeep A. Clinical Efficacy of 1% Alendronate Gel in Adjunct to Mechanotherapy in the Treatment of Aggressive Periodontitis: A Randomized Controlled Clinical Trial. J Periodontol 2012; 83:19-26. [DOI: 10.1902/jop.2011.110206] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Sharma A, Pradeep A. Clinical Efficacy of 1% Alendronate Gel as a Local Drug Delivery System in the Treatment of Chronic Periodontitis: A Randomized, Controlled Clinical Trial. J Periodontol 2012; 83:11-8. [DOI: 10.1902/jop.2011.110091] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Jones DS, Muldoon BC, Woolfson A, Andrews GP, McCoy CP, Sanderson F. Moisture‐activated rheological structuring of nonaqueous poloxamine–poly(acrylic acid) systems designed as novel biomedical implants. J Pharm Sci 2010; 99:1838-54. [DOI: 10.1002/jps.21956] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Jones DS, Andrews GP, Gorman SP. Characterization of crosslinking effects on the physicochemical and drug diffusional properties of cationic hydrogels designed as bioactive urological biomaterials. J Pharm Pharmacol 2010; 57:1251-59. [PMID: 16259753 DOI: 10.1211/jpp.57.10.0003] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
This study examined the effects of concentration and type of crosslinker (tetraethyleneglycol diacrylate, TEGDA; diethyleneglycol dimethacrylate, DEGDMA; and polyethyleneglycol dimethacrylate, PEGDMA) on the mechanical and drug diffusional properties of hydrogels that had been selected as candidate coatings for bioactive medical devices. Hydrogels (dimethylaminoethylmethacrylate-covinylpyrrolidone; 1:1) were prepared by free radical polymerization and characterized using tensile analysis, dynamic contact angle analysis and analysis of swelling at pH 6.0. The release of fusidic acid and chlorhexidine was evaluated using buffered medium at pH 6.0 and, in addition, using dissolution medium that had been buffered to pH 9 in the presence and absence of elevated concentrations of calcium, representative of urinary encrustation. Crosslinker concentration, but not type, affected the advancing and receding contact angles. Conversely, both crosslinker type and concentration affected the mechanical and swelling properties of the hydrogels. Maximum swelling and elongation at break were associated with the PEGDMA-crosslinked hydrogels whereas TEGDA-crosslinked hydrogels exhibited the maximum ultimate tensile strength and Young's modulus. Drug release from all systems occurred by diffusion. The mass of chlorhexidine and fusidic acid released was dependent on crosslinker type and concentration, with hydrogels crosslinked with PEGDMA offering the greatest mass of drug released at each sampling period. The mass of fusidic acid but not chlorhexidine released at pH 9.0 in a calcium augmented medium was lower than that released in the same medium devoid of elevated calcium, due to the formation of the poorly soluble calcium salt. In conclusion, this study has uniquely examined the effects of crosslinker type and concentration on physicochemical and drug release properties essential to the clinical and non-clinical performance of bioactive hydrogels for medical device application.
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Affiliation(s)
- David S Jones
- Medical Devices Unit, School of Pharmacy, The Queen's University of Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, UK.
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Karavana SY, Güneri P, Ertan G. Benzydamine hydrochloride buccal bioadhesive gels designed for oral ulcers: preparation, rheological, textural, mucoadhesive and release properties. Pharm Dev Technol 2010; 14:623-31. [PMID: 19883251 DOI: 10.3109/10837450902882351] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study developed and examined the characterization of Benzidamine hydrochloride (BNZ) bioadhesive gels as platforms for oral ulcer treatments. Bioadhesive gels were prepared with four different hydroxypropylmethylcellulose (HPMC) types (E5, E15, E50 and K100M) with different ratios. Each formulation was characterized in terms of drug release, rheological, mechanical properties and adhesion to a buccal bovine mucosa. Drug release was significantly decreased as the concentration and individual viscosity of each polymeric component increased due to improved viscosity of the gel formulations. The amount of drug released for the formulations ranged from 0.76 +/- 0.07 and 1.14 +/- 0.01 (mg/cm2 +/- SD). Formulations exhibited pseudoplastic flow and all formulations, increasing the concentration of HPMC content significantly raised storage modulus (G'), loss modulus (G''), dynamic viscosity (eta') at 37 degrees C. Increasing concentration of each polymeric component also significantly improved the hardness, compressibility, adhesiveness, cohesiveness and mucoadhesion but decreased the elasticity of the gel formulations. All formulations showed non-Fickian diffusion due to the relaxation and swelling of the polymers with water. In conclusion, the formulations studied showed a wide range of mechanical and drug diffusion characteristics. On the basis of the obtained data, the bioadhesive gel formulation which was prepared with 2.5% HPMC K 100M was determined as the most appropriate formulation for buccal application in means of possessing suitable mechanical properties, exhibiting high cohesion and bioadhesion.
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Affiliation(s)
- Sinem Yaprak Karavana
- Faculty of Pharmacy, Department of Pharmaceutical Technology, Ege University, 35100 Bornova, Izmir, Turkey.
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Andrews GP, Donnelly L, Jones DS, Curran RM, Morrow RJ, Woolfson AD, Malcolm RK. Characterization of the rheological, mucoadhesive, and drug release properties of highly structured gel platforms for intravaginal drug delivery. Biomacromolecules 2009; 10:2427-35. [PMID: 19642670 PMCID: PMC2745825 DOI: 10.1021/bm9003332] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2009] [Revised: 06/08/2009] [Indexed: 11/28/2022]
Abstract
This investigation describes the formulation and characterization of rheologically structured vehicles (RSVs) designed for improved drug delivery to the vagina. Interactive, multicomponent, polymeric platforms were manufactured containing hydroxyethylcellulose (HEC, 5% w/w) polyvinylpyrrolidone (PVP, 4% w/w), Pluronic (PL, 0 or 10% w/w), and either polycarbophil (PC, 3% w/w) or poly(methylvinylether-co-maleic anhydride) (Gantrez S97, 3% w/w) as a mucoadhesive agent. The rheological (torsional and dynamic), mechanical (compressional), and mucoadhesive properties were characterized and shown to be dependent upon the mucoadhesive agent used and the inclusion/exclusion of PL. The dynamic rheological properties of the gel platforms were also assessed following dilution with simulated vaginal fluid (to mimic in vivo dilution). RSVs containing PC were more rheologically structured than comparator formulations containing GAN. This trend was also reflected in formulation hardness, compressibility, consistency, and syringeability. Moreover, formulations containing PL (10% w/w) were more rheologically structured than formulations devoid of PL. Dilution with simulated vaginal fluids significantly decreased rheological structure, although RSVs still retained a highly elastic structure (G' > G'' and tan delta < 1). Furthermore, RSVs exhibited sustained drug release properties that were shown to be dependent upon their rheological structure. It is considered that these semisolid drug delivery systems may be useful as site-retentive platforms for the sustained delivery of therapeutic agents to the vagina.
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Affiliation(s)
- Gavin P Andrews
- Drug Delivery and Biomaterials Group, The 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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Bruschi ML, de Freitas O, Lara EHGE, Panzeri H, Gremião MPD, Jones DS. Precursor System of Liquid Crystalline Phase Containing Propolis Microparticles for the Treatment of Periodontal Disease: Development and Characterization. Drug Dev Ind Pharm 2008; 34:267-78. [DOI: 10.1080/03639040701655911] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Jones DS, Muldoon BCO, Woolfson AD, Andrews GP, Sanderson FD. Physicochemical characterization of bioactive polyacrylic acid organogels as potential antimicrobial implants for the buccal cavity. Biomacromolecules 2008; 9:624-33. [PMID: 18220350 DOI: 10.1021/bm700597e] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study describes the formulation and physicochemical characterization of poly(acrylic acid) (PAA) organogels, designed as bioactive implants for improved treatment of infectious diseases of the oral cavity. Organogels were formulated containing a range of concentrations of PAA (3-10% w/w) and metronidazole (2 or 5% w/w, representing a model antimicrobial agent) in different nonaqueous solvents, namely, glycerol (Gly), polyethylene glycol (PEG 400), or propylene glycol (PG). Characterization of the organogels was performed using flow rheometry, compressional analysis, oscillatory rheometry, in vitro mucoadhesion, moisture uptake, and drug release, methods that provide information pertaining to the nonclinical and clinical use of these systems. Increasing the concentration of PAA significantly increased the consistency, compressibility, storage modulus, loss modulus, dynamic viscosity, mucoadhesion, and the rate of drug release. These observations may be accredited to enhanced molecular polymer entanglement. In addition, the choice of solvent directly affected the physicochemical parameters of the organogels, with noticeable differences observed between the three solvents examined. These differences were accredited to the nature of the interaction of PAA with each solvent and, importantly, the density of the resultant physical cross-links. Good correlation was observed between the viscoelastic properties and drug release, with the exception of glycerol-based formulations containing 5 and 10% w/w PAA. This disparity was due to excessive swelling during the dissolution analysis. Ideally, formulations should exhibit controlled drug release, high viscoelasticity, and mucoadhesion, but should flow under minimal stresses. Based on these criteria, PEG 400-based organogels composed of 5% or 10% w/w PAA exhibited suitable physicochemical properties and are suggested to be a potentially interesting strategy for use as bioactive implants designed for use in the oral cavity.
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Affiliation(s)
- David S Jones
- Medical Polymers Research Institute, 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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Jones DS, Muldoon BCO, Woolfson AD, Sanderson FD. An Examination of the Rheological and Mucoadhesive Properties of Poly(Acrylic Acid) Organogels Designed as Platforms for Local Drug Delivery to the Oral Cavity. J Pharm Sci 2007; 96:2632-46. [PMID: 17702045 DOI: 10.1002/jps.20771] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This study examined the rheological/mucoadhesive properties of poly(acrylic acid) PAA organogels as platforms for drug delivery to the oral cavity. Organogels were prepared using PAA (3%, 5%, 10% w/w) dissolved in ethylene glycol (EG), propylene glycol (PG), 1,3-propylene glycol (1,3-PG), 1,5-propanediol (1,5-PD), polyethylene glycol 400 (PEG 400), or glycerol. All organogels exhibited pseudoplastic flow. The increase in storage (G') and loss (G'') moduli of organogels as a function of frequency was minimal, G'' was greater than G'' (at all frequencies), and the loss tangent <1, indicative of gel behavior. Organogels prepared using EG, PG, and 1,3-propanediol (1,3-PD) exhibited similar flow/viscoelastic properties. Enhanced rheological structuring was associated with organogels prepared using glycerol (in particular) and PEG 400 due to their interaction with adjacent carboxylic acid groups on each chain and on adjacent chains. All organogels (with the exception of 1,5-PD) exhibited greater network structure than aqueous PAA gels. Organogel mucoadhesion increased with polymer concentration. Greatest mucoadhesion was associated with glycerol-based formulations, whereas aqueous PAA gels exhibited the lowest mucoadhesion. The enhanced network structure and the excellent mucoadhesive properties of these organogels, both of which may be engineered through choice of polymer concentration/solvent type, may be clinically useful for the delivery of drugs to the oral cavity.
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Affiliation(s)
- David S Jones
- School of Pharmacy, Medical Biology Centre, The Queen's University of Belfast, 97, Lisburn Road, Belfast BT9 7BL, Northern Ireland, UK.
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Bruschi ML, Jones DS, Panzeri H, Gremião MPD, de Freitas O, Lara EHG. Semisolid systems containing propolis for the treatment of periodontal disease: in vitro release kinetics, syringeability, rheological, textural, and mucoadhesive properties. J Pharm Sci 2007; 96:2074-89. [PMID: 17301966 DOI: 10.1002/jps.20843] [Citation(s) in RCA: 144] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Formulations containing poloxamer 407 (P407), carbopol 934P (C934P), and propolis extract (PE) were designed for the treatment of periodontal disease. Gelation temperature, in vitro drug release, rheology, hardness, compressibility, adhesiveness, mucoadhesion, and syringeability of formulations were determined. Propolis release from formulations was controlled by the phenomenon of relaxation of polymer chains. Formulations exhibited pseudoplastic flow and low degrees of thixotropy or rheopexy. In most samples, increasing the concentration of C934P content significantly increased storage modulus (G'), loss modulus (G''), and dynamic viscosity (eta'), at 5 degrees C, G'' exceeded G'. At 25 and 37 degrees C, eta' of each formulation depended on the oscillatory frequency. Formulations showed thermoresponsive behavior, existing as a liquid at room temperature and gel at 34-37 degrees C. Increasing the C934P content or temperature significantly increased formulation hardness, compressibility, and adhesiveness. The greatest mucoadhesion was noted in the formulation containing 15% P407 (w/w) and 0.25% C934P (w/w). The work of syringeability values of all formulations were similar and very desirable with regard to ease of administration. The data obtained in these formulations indicate a potentially useful role in the treatment of periodontitis and suggest they are worthy of clinical evaluation.
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Affiliation(s)
- Marcos L Bruschi
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Zeferino Vaz, s/n, CEP 14040-903, Ribeirão Preto, SP, Brazil.
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Jones DS, Lorimer CJ, Andrews GP, McCoy CP, Gorman SP. An examination of the thermorheological and drug release properties of zinc tetraphenylporphyrin-containing thermoresponsive hydrogels, designed as light activated antimicrobial implants. Chem Eng Sci 2007. [DOI: 10.1016/j.ces.2006.10.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Andrews GP, Jones DS. Rheological characterization of bioadhesive binary polymeric systems designed as platforms for drug delivery implants. Biomacromolecules 2006; 7:899-906. [PMID: 16529429 DOI: 10.1021/bm050620y] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study describes the formulation and characterization of binary interactive polymeric systems, designed as platforms for improved drug delivery to mucosal sites. Binary interactive systems were manufactured containing hydroxyethylcellulose (HEC; 1-5% w/w) and polycarbophil (PC; 1-5% w/w) at pH 7, and their rheological (flow and dynamic), mechanical, and mucoadhesive properties were characterized, both before and after dilution with phosphate buffered saline (designed to mimic dilution by biological fluids). Physical interactions between HEC and PC were confirmed by the observed rheological synergy. Within the binary interactive systems increasing polymer concentration increased the storage modulus (G'), loss modulus (G' '), dynamic viscosity (eta'), hardness, compressibility, consistency, and mucoadhesion yet decreased the loss tangent. This was attributed to enhanced entanglements and interactions between adjacent polymer chains. Dilution with PBS altered the above properties; however, the binary interactive systems, particularly those containing higher concentrations of HEC, still exhibited predominantly elastic properties (high G', low tan delta). In light of this, it is suggested that the rheological and mucoadhesive properties of binary interactive systems composed of HEC (5% w/w) and PC (1-3% w/w) offered particular promise as platforms for topical mucosal drug delivery systems.
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Affiliation(s)
- Gavin P Andrews
- Medical Polymers Research Institute, The 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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Bonacucina G, Ponchel G, Ringard C, Palmieri G, Grossiord JL. Rheological and adhesive properties of new thermoresponsive hyperbranched poly[ethylene oxide-b-propylene oxide-b-ethylene oxide]. J Drug Deliv Sci Technol 2006. [DOI: 10.1016/s1773-2247(06)50009-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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