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Wang T, Li M, Gu Z, Qu C, Segervald J, Salh R, Wågberg T, Wang J, Kou W. Fluoride releasing in polymer blends of poly(ethylene oxide) and poly(methyl methacrylate). Front Chem 2024; 12:1356029. [PMID: 38406557 PMCID: PMC10884178 DOI: 10.3389/fchem.2024.1356029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 01/26/2024] [Indexed: 02/27/2024] Open
Abstract
Introduction: Polymethyl methacrylate is a polymer commonly used in clinical dentistry, including denture bases, occlusal splints and orthodontic retainers. Methods: To augment the polymethyl methacrylate-based dental appliances in counteracting dental caries, we designed a polymer blend film composed of polymethyl methacrylate and polyethylene oxide by solution casting and added sodium fluoride. Results: Polyethylene oxide facilitated the dispersion of sodium fluoride, decreased the surface average roughness, and positively influenced the hydrophilicity of the films. The blend film made of polymethyl methacrylate, polyethylene oxide and NaF with a mass ratio of 10: 1: 0.3 showed sustained release of fluoride ions and acceptable cytotoxicity. Antibacterial activity of all the films to Streptococcus mutans was negligible. Discussion: This study demonstrated that the polymer blends of polyethylene oxide and polymethyl methacrylate could realize the relatively steady release of fluoride ions with high biocompatibility. This strategy has promising potential to endow dental appliances with anti-cariogenicity.
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Affiliation(s)
- Tianxiao Wang
- Department of Odontology, Umeå University, Umeå, Sweden
| | - Menghong Li
- Department of Odontology, Umeå University, Umeå, Sweden
| | - Ziyan Gu
- Department of Odontology, Umeå University, Umeå, Sweden
| | - Chengjuan Qu
- Department of Odontology, Umeå University, Umeå, Sweden
| | | | - Roushdey Salh
- Department of Physics, Umeå University, Umeå, Sweden
| | | | - Jia Wang
- Department of Physics, Umeå University, Umeå, Sweden
| | - Wen Kou
- Department of Odontology, Umeå University, Umeå, Sweden
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Aversa R, Perrotta V, Wang C, Apicella A. Bio-Resorption Control of Magnesium Alloy AZ31 Coated with High and Low Molecular Weight Polyethylene Oxide (PEO) Hydrogels. Gels 2023; 9:779. [PMID: 37888352 PMCID: PMC10606464 DOI: 10.3390/gels9100779] [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: 09/10/2023] [Revised: 09/20/2023] [Accepted: 09/23/2023] [Indexed: 10/28/2023] Open
Abstract
Magnesium AZ31 alloy has been chosen as bio-resorbable temporary prosthetic implants to investigate the degradation processes in a simulating body fluid (SBF) of the bare metal and the ones coated with low and high-molecular-weight PEO hydrogels. Hydrogel coatings are proposed to control the bioresorption rate of AZ31 alloy. The alloy was preliminary hydrothermally treated to form a magnesium hydroxide layer. 2 mm discs were used in bioresorption tests. Scanning electron microscopy was used to characterize the surface morphology of the hydrothermally treated and PEO-coated magnesium alloy surfaces. The variation of pH and the mass of Mg2+ ions present in the SBF corroding medium have been monitored for 15 days. Corrosion current densities (Icorr) and corrosion potentials (Ecorr) were evaluated from potentiodynamic polarisation tests on the samples exposed to the SBF solution. Kinetics of cumulative Mg ions mass released in the corroding solution have been evaluated regarding cations diffusion and mass transport parameters. The initial corrosion rates for the H- and L-Mw PEO-coated specimens were similar (0.95 ± 0.12 and 1.82 ± 0.52 mg/cm2day, respectively) and almost 4 to 5 times slower than that of the uncoated system (6.08 mg/cm2day). Results showed that the highly swollen PEO hydrogel coatings may extend into the bulk solution, protecting the coated metal and efficiently controlling the degradation rate of magnesium alloys. These findings focus more research effort on investigating such systems as tunable bioresorbable prosthetic materials providing idoneous environments to support cells and bone tissue repair.
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Affiliation(s)
- Raffaella Aversa
- Advanced Materials Lab, Department of Architecture and Industrial Design, University of Campania, Via San Lorenzo, 81031 Aversa, Italy; (R.A.); (V.P.)
| | - Valeria Perrotta
- Advanced Materials Lab, Department of Architecture and Industrial Design, University of Campania, Via San Lorenzo, 81031 Aversa, Italy; (R.A.); (V.P.)
| | - Chao Wang
- Key Laboratory of Biomechanics and Mechanobiology, Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Beihang University, No. 37, Xueyuan Road, Beijing 100083, China;
- State Key Laboratory of Virtual Reality Technology and Systems, Beihang University, No. 37, Xueyuan Road, Beijing 100083, China
| | - Antonio Apicella
- Advanced Materials Lab, Department of Architecture and Industrial Design, University of Campania, Via San Lorenzo, 81031 Aversa, Italy; (R.A.); (V.P.)
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Almotairy A, Alyahya M, Althobaiti A, Almutairi M, Bandari S, Ashour EA, Repka MA. Disulfiram 3D printed film produced via hot-melt extrusion techniques as a potential anticervical cancer candidate. Int J Pharm 2023; 635:122709. [PMID: 36801364 PMCID: PMC10023499 DOI: 10.1016/j.ijpharm.2023.122709] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/26/2023] [Accepted: 02/05/2023] [Indexed: 02/18/2023]
Abstract
Cervical cancer is known globally as one of the most common health problems in women. Indeed, one of the most convenient approaches for its treatment is an appropriate bioadhesive vaginal film. This approach provides a local treatment modality, which inevitably decreases dosing frequency and improves patient compliance. Recently, disulfiram (DSF) has been investigated and demonstrated to possess anticervical cancer activity; therefore, it is employed in this work. The current study aimed to produce a novel, personalized three-dimensional (3D) printed DSF extended-release film using the hot-melt extrusion (HME) and 3D printing technologies. The optimization of the formulation composition and the HME and 3D printing processing temperatures was an important factor for overcoming the DSF heat-sensitivity issue. In addition, the 3D printing speed was specifically the most crucial parameter for alleviating heat-sensitivity concerns, which led to the production of films (F1 and F2) with an acceptable DSF content and good mechanical properties. The bioadhesion film study using sheep cervical tissue indicated a reasonable adhesive peak force (N) of 0.24 ± 0.08 for F1 and 0.40 ± 0.09 for F2, while the work of adhesion (N.mm) for F1 and F2 was 0.28 ± 0.14 and 0.54 ± 0.14, respectively. Moreover, the cumulative in vitro release data indicated that the printed films released DSF for up to 24 h. HME-coupled 3D printing successfully produced a patient-centric and personalized DSF extended-release vaginal film with a reduced dose and longer dosing interval.
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Affiliation(s)
- Ahmed Almotairy
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA; Pharmaceutics and Pharmaceutical Technology Department, College of Pharmacy Taibah University, Al Madinah AlMunawarah 30001, Saudi Arabia
| | - Mohammed Alyahya
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Abdulmajeed Althobaiti
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Mashan Almutairi
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA; Department of Pharmaceutics, College of Pharmacy, University of Hail, Hail 81442, Saudi Arabia
| | - Suresh Bandari
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Eman A Ashour
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Michael A Repka
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA; Pii Center for Pharmaceutical Technology, The University of Mississippi, University, MS 38677, USA.
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Bezerra GSN, de Lima TADM, Colbert DM, Geever J, Geever L. Formulation and Evaluation of Fenbendazole Extended-Release Extrudes Processed by Hot-Melt Extrusion. Polymers (Basel) 2022; 14:polym14194188. [PMID: 36236135 PMCID: PMC9573241 DOI: 10.3390/polym14194188] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/03/2022] [Accepted: 10/04/2022] [Indexed: 11/16/2022] Open
Abstract
This study aimed to demonstrate the feasibility of hot-melt extrusion in the development of extended-release formulations of Fenbendazole (Fen) dispersed in PEO/PCL blend-based matrices. Their thermal, physical, chemical and viscosity properties were assessed by differential scanning calorimetry, thermogravimetric analysis/derivative thermogravimetry, Fourier transform infrared spectroscopy, X-ray diffraction spectroscopy, and melt flow index. Drug dispersion was analyzed by scanning electron microscopy with electron dispersive X-ray spectroscopy, and drug release was evaluated by ultraviolet-visible spectroscopy. A thermal analysis indicated the conversion of the drug to its amorphous state. FTIR analysis endorsed the thermal studies pointing to a decrease in the drug's crystallinity with the establishment of intermolecular interactions. XRD analysis confirmed the amorphous nature of Fen. MFI test revealed that PCL acts as a plasticizer when melt-processed with PEO. SEM images displayed irregular surfaces with voids and pores, while EDX spectra demonstrated a homogeneous drug distribution throughout the polymeric carrier. Dissolution testing revealed that PCL retards the drug release proportionally to the content of such polymer incorporated. These melt-extruded matrices showed that the drug release rate in a PEO/PCL blend can easily be tailored by altering the ratio of PCL to address the issues related to the multiple-dosing regimen of Fen in ruminants.
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Wustoni S, Nikiforidis G, Ohayon D, Inal S, Indartono YS, Suendo V, Yuliarto B. Performance of PEDOTOH/PEO-based Supercapacitors in Agarose Gel Electrolyte. Chem Asian J 2022; 17:e202200427. [PMID: 35735047 DOI: 10.1002/asia.202200427] [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: 04/23/2022] [Revised: 06/22/2022] [Indexed: 11/12/2022]
Abstract
Poly(3,4-ethylenedioxythiophene) (PEDOT) is a prime example of conducting polymers materials for supercapacitors electrodes that offer ease of processability and sophisticated chemical stability during operation and storage in aqueous environments. Yet, continuous improvement on its electrochemical capacitance and stability upon long cycles remains a major interest in the field, such as the developing PEDOT-based composites. This work evaluates the electrochemical performances of hydroxymethyl PEDOT (PEDOTOH) coupled with hydrogel additives, namely poly(ethylene oxide) (PEO), poly(acrylic acid) (PAA), and polyethyleneimine (PEI), fabricated via a single-step electrochemical polymerization method in an aqueous solution. The PEDOTOH/PEO composite exhibits the highest capacitance (195.2 F g-1) compared to pristine PEDOTOH (153.9 F g-1), PEDOTOH/PAA (129.9 F g-1), and PEDOTOH/PEI (142.3 F g-1) at a scan rate of 10 mV s-1. The PEDOTOH/PEO electrodes were then assembled into a symmetrical supercapacitor in an agarose gel. The type of supporting electrolytes and salt concentrations were further examined to identify the optimal agarose-based gel electrolyte. The supercapacitors comprising 2 M agarose-LiClO4 achieved a specific capacitance of 27.6 F g-1 at a current density of 2 A g-1, a capacitance retention of ~94% after 10,000 charge/discharge cycles at 10.6 A g-1, delivering a maximum energy and power densities of 11.2 Wh kg-1 and 3.45 kW kg-1, respectively. The performance of the proposed supercapacitor outperformed several reported PEDOT-based supercapacitors, including PEDOT/carbon fiber, PEDOT/CNT, and PEDOT/graphene composites. This study provides insights into the effect of incorporated hydrogel in the PEDOTOH network and the optimal conditions of agarose-based gel electrolytes for high-performance PEDOT-based supercapacitor devices.
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Affiliation(s)
- Shofarul Wustoni
- Institut Teknologi Bandung, Chemistry, Jalan Ganeca No 10, 40132, Bandung, INDONESIA
| | - Georgios Nikiforidis
- University College London, UCL Institute for Materials Discovery, UNITED KINGDOM
| | - David Ohayon
- King Abdullah University of Science and Technology, BESE, SAUDI ARABIA
| | - Sahika Inal
- King Abdullah University of Science and Technology, BESE, SAUDI ARABIA
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Redefinition to bilayer osmotic pump tablets as subterranean river system within mini-earth via three-dimensional structure mechanism. Acta Pharm Sin B 2022; 12:2568-2577. [PMID: 35646529 PMCID: PMC9136608 DOI: 10.1016/j.apsb.2021.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/11/2021] [Accepted: 10/24/2021] [Indexed: 11/24/2022] Open
Abstract
Defining and visualizing the three-dimensional (3D) structures of pharmaceuticals provides a new and important tool to elucidate the phenomenal behavior and underlying mechanisms of drug delivery systems. The mechanism of drug release from complex structured dosage forms, such as bilayer osmotic pump tablets, has not been investigated widely for most solid 3D structures. In this study, bilayer osmotic pump tablets undergoing dissolution, as well as after dissolution in a desiccated solid state were examined, and visualized by synchrotron radiation micro-computed tomography (SR-μCT). In situ formed 3D structures at different in vitro drug release states were characterized comprehensively. A distinct movement pattern of NaCl crystals from the push layer to the drug layer was observed, beneath the semi-permeable coating in the desiccated tablet samples. The 3D structures at different dissolution time revealed that the pushing upsurge in the bilayer osmotic pump tablet was directed via peripheral "roadways". Typically, different regions of the osmotic front, infiltration region, and dormant region were classified in the push layer during the dissolution of drug from tablet samples. According to the observed 3D microstructures, a "subterranean river model" for the drug release mechanism has been defined to explain the drug release mechanism.
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7
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On the Efficacy of ZnO Nanostructures against SARS-CoV-2. Int J Mol Sci 2022; 23:ijms23063040. [PMID: 35328455 PMCID: PMC8950216 DOI: 10.3390/ijms23063040] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/08/2022] [Accepted: 03/09/2022] [Indexed: 12/23/2022] Open
Abstract
In 2019, the new coronavirus disease (COVID-19), related to the severe acute respiratory syndrome coronavirus (SARS-CoV-2), started spreading around the word, giving rise to the world pandemic we are still facing. Since then, many strategies for the prevention and control of COVID-19 have been studied and implemented. In addition to pharmacological treatments and vaccines, it is mandatory to ensure the cleaning and disinfection of the skin and inanimate surfaces, especially in those contexts where the contagion could spread quickly, such as hospitals and clinical laboratories, schools, transport, and public places in general. Here, we report the efficacy of ZnO nanoparticles (ZnONPs) against SARS-CoV-2. NPs were produced using an ecofriendly method and fully characterized; their antiviral activity was tested in vitro against SARS-CoV-2, showing a decrease in viral load between 70% and 90%, as a function of the material’s composition. Application of these nano-antimicrobials as coatings for commonly touched surfaces is envisaged.
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8
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Sharma PK, Choudhury D, Yadav V, Murty USN, Banerjee S. 3D printing of nanocomposite pills through desktop vat photopolymerization (stereolithography) for drug delivery reasons. 3D Print Med 2022; 8:3. [PMID: 35038049 PMCID: PMC8762875 DOI: 10.1186/s41205-022-00130-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 12/22/2021] [Indexed: 12/18/2022] Open
Abstract
Background The desktop vat polymerization process or stereolithography printing is an ideal approach to develop multifunctional nanocomposites wherein a conventional solid dosage form is used as a reservoir for compliant administration of drug-loaded nanocarriers. Methods In this study, a nanocomposite drug delivery system, that is, hydrogel nanoparticles of an approved nutraceutical, berberine entrapped within vat photopolymerized monoliths, was developed for drug delivery applications. For the fabrication of the nanocomposite drug delivery systems/pills, a biocompatible vat photopolymerized resin was selected as an optimum matrix capable of efficiently delivering berberine from stereolithography mediated 3D printed nanocomposite pill. Results The obtained data reflected the efficient formation of berberine-loaded hydrogel nanoparticles with a mean particle diameter of 95.05 ± 4.50 nm but low loading. Stereolithography-assisted fabrication of monoliths was achieved with high fidelity (in agreement with computer-aided design), and photo-crosslinking was ascertained through Fourier-transform infrared spectroscopy. The hydrogel nanoparticles were entrapped within the pills during the stereolithography process, as evidenced by electron microscopy. The nanocomposite pills showed a higher swelling in an acidic environment and consequently faster berberine release of 50.39 ± 3.44% after 4 h. The overall results suggested maximal release within the gastrointestinal transit duration and excretion of the exhausted pills. Conclusions We intended to demonstrate the feasibility of making 3D printed nanocomposite pills achieved through the desktop vat polymerization process for drug delivery applications.
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Affiliation(s)
- Peeyush Kumar Sharma
- Department of Pharmaceutics, National Institute of Pharmaceutical Education & Research (NIPER)-Guwahati, Changsari, Assam, 781101, India.,National Centre for Pharmacoengineering, NIPER-Guwahati, Changsari, Assam, 781101, India
| | - Dinesh Choudhury
- Department of Pharmaceutics, National Institute of Pharmaceutical Education & Research (NIPER)-Guwahati, Changsari, Assam, 781101, India.,National Centre for Pharmacoengineering, NIPER-Guwahati, Changsari, Assam, 781101, India
| | - Vivek Yadav
- Department of Pharmaceutics, National Institute of Pharmaceutical Education & Research (NIPER)-Guwahati, Changsari, Assam, 781101, India
| | - U S N Murty
- National Centre for Pharmacoengineering, NIPER-Guwahati, Changsari, Assam, 781101, India.,NIPER-Guwahati, Changsari, Assam, 781101, India
| | - Subham Banerjee
- Department of Pharmaceutics, National Institute of Pharmaceutical Education & Research (NIPER)-Guwahati, Changsari, Assam, 781101, India. .,National Centre for Pharmacoengineering, NIPER-Guwahati, Changsari, Assam, 781101, India.
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Polyethylene oxide matrix tablet swelling evolution: The impact of molecular mass and tablet composition. ACTA PHARMACEUTICA (ZAGREB, CROATIA) 2021; 71:215-243. [PMID: 33151172 DOI: 10.2478/acph-2021-0018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/06/2020] [Indexed: 01/19/2023]
Abstract
This article describes the designing of matrix tablets composed of polyethylene oxides (PEOs) with relative molecular masses of 1 × 106, 2 × 106, and 4 × 106. Percolation thresholds were determined for all of the selected PEO formulations (18, 16, and 12 %, m/m), taking into consideration excipients and tablet surface area which significantly increased the percolation threshold. Moreover, the robustness of the gel layer in PEO matrix tablets was evaluated by magnetic resonance imaging under various mechanical stresses (no flow, 12 mL min-1, and 64 mL-1 of medium flow). Correlations between the percolation threshold and gel thickness (R2 = 0.86), gel thickness and the erosion coefficient (R2 = 0.96) was detected. Furthermore, small-angle X-ray scattering of the selected PEOs detected differences in polymer molecular complexity at the nanoscale. Finally, the ratio of the heat of coalescence to the heat of fusion has confirmed the PEO molecular mass-dependent percolation threshold.
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Aversa R, Petrescu RV, Petrescu FIT, Perrotta V, Apicella D, Apicella A. Biomechanically Tunable Nano-Silica/P-HEMA Structural Hydrogels for Bone Scaffolding. Bioengineering (Basel) 2021; 8:bioengineering8040045. [PMID: 33916623 PMCID: PMC8065879 DOI: 10.3390/bioengineering8040045] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 03/24/2021] [Accepted: 04/02/2021] [Indexed: 11/17/2022] Open
Abstract
Innovative tissue engineering biomimetic hydrogels based on hydrophilic polymers have been investigated for their physical and mechanical properties. 5% to 25% by volume loading PHEMA-nanosilica glassy hybrid samples were equilibrated at 37 °C in aqueous physiological isotonic and hypotonic saline solutions (0.15 and 0.05 M NaCl) simulating two limiting possible compositions of physiological extracellular fluids. The glassy and hydrated hybrid materials were characterized by both dynamo-mechanical properties and equilibrium absorptions in the two physiological-like aqueous solutions. The mechanical and morphological modifications occurring in the samples have been described. The 5% volume nanosilica loading hybrid nanocomposite composition showed mechanical characteristics in the dry and hydrated states that were comparable to those of cortical bone and articular cartilage, respectively, and then chosen for further sorption kinetics characterization. Sorption and swelling kinetics were monitored up to equilibrium. Changes in water activities and osmotic pressures in the water-hybrid systems equilibrated at the two limiting solute molarities of the physiological solutions have been related to the observed anomalous sorption modes using the Flory-Huggins interaction parameter approach. The bulk modulus of the dry and glassy PHEMA-5% nanosilica hybrid at 37 °C has been observed to be comparable with the values of the osmotic pressures generated from the sorption of isotonic and hypotonic solutions. The anomalous sorption modes and swelling rates are coherent with the difference between osmotic swelling pressures and hybrid glassy nano-composite bulk modulus: the lower the differences the higher the swelling rate and equilibrium solution uptakes. Bone tissue engineering benefits of the use of tuneable biomimetic scaffold biomaterials that can be “designed” to act as biocompatible and biomechanically active hybrid interfaces are discussed.
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Affiliation(s)
- Raffaella Aversa
- Advanced Materials Lab, Department of Architecture and Industrial Design, Second University of Naples, Abazia di San Lorenzo, 81031 Aversa, Italy; (R.A.); (V.P.)
| | - Relly Victoria Petrescu
- IFToMM, ARoTMM, Bucharest Polytechnic University, Splaiul Independenței 313, 060042 Bucharest, Romania; (R.V.P.); (F.I.T.P.)
| | - Florian Ion T. Petrescu
- IFToMM, ARoTMM, Bucharest Polytechnic University, Splaiul Independenței 313, 060042 Bucharest, Romania; (R.V.P.); (F.I.T.P.)
| | - Valeria Perrotta
- Advanced Materials Lab, Department of Architecture and Industrial Design, Second University of Naples, Abazia di San Lorenzo, 81031 Aversa, Italy; (R.A.); (V.P.)
| | | | - Antonio Apicella
- Advanced Materials Lab, Department of Architecture and Industrial Design, Second University of Naples, Abazia di San Lorenzo, 81031 Aversa, Italy; (R.A.); (V.P.)
- Correspondence:
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Application of Focus Variation Microscopy and Dissolution Imaging in Understanding the Behaviour of Hydrophilic Matrices. Pharmaceutics 2020; 12:pharmaceutics12121162. [PMID: 33260657 PMCID: PMC7759878 DOI: 10.3390/pharmaceutics12121162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/13/2020] [Accepted: 11/24/2020] [Indexed: 12/13/2022] Open
Abstract
Hydrophilic matrix systems can be found in a wide range of extended release pharmaceutical formulations. The main principle of these systems is that upon contact with water, the hydrophilic component swells to form a hydrated gel layer which controls drug release. The following work demonstrates an explorative study into the use of dissolution imaging and focus variation microscopy with hydrophilic polymers. This study investigated the surface properties of xanthan gum (XG), polyethylene oxide (PEO), and hypromellose (hydroxypropyl methylcellulose, HPMC) compacts with each of these three hydrophilic polymers from one of each classification of natural, semi-synthetic, or synthetic polymer using a focus variation instrument. The auto correlation length (Sal) showed all surface profiles from the compacts displayed a value below 0.1 mm, indicating that only high frequency components (i.e., roughness) were considered and that the analysis had been successful. The developed interfacial area ratio (Sdr) displayed values below 5% in line with ISO guidelines for all the polymers studied with their texture aspect ratio values (Str) > 0.5, indicating uniformity of the surfaces of the produced compacts. Of the various parameters studied, areal material ratio (Smr2) predicted XG to wet and hydrate quicker than PEO, with PEO also wetting and hydrating quicker than the HPMC. The dissolution imaging and initial swelling studies proved to concur with the findings from the areal material ratio (Smr2) parameter, suggesting porosity was not an indicator for the ease with which water ingress occurs. This study suggests the Smr2 surface parameter to potentially predict wetting and initial hydration of hydrophilic polymers, however care should be taken as this study consists of a selected number of hydrophilic polymers.
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12
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Mankovsky D, Lepage D, Lachal M, Caradant L, Aymé-Perrot D, Dollé M. Water content in solid polymer electrolytes: the lost knowledge. Chem Commun (Camb) 2020; 56:10167-10170. [PMID: 32747887 DOI: 10.1039/d0cc03556d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We reproducibly quantify the water content in different SPE systems through various processing/drying conditions and tie the residual amounts of water to heightened ionic conductivities. Moreover, we emphasise on the need to control the sample preparation and isolation as hydration occurs instantly when the dried sample encounters air.
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Affiliation(s)
- Denis Mankovsky
- Département de Chimie, Université de Montréal, CP6128 Succursale Centre-Ville, Montréal, QC H3T 1J4, Canada.
| | - David Lepage
- Département de Chimie, Université de Montréal, CP6128 Succursale Centre-Ville, Montréal, QC H3T 1J4, Canada.
| | - Marie Lachal
- Département de Chimie, Université de Montréal, CP6128 Succursale Centre-Ville, Montréal, QC H3T 1J4, Canada.
| | - Léa Caradant
- Département de Chimie, Université de Montréal, CP6128 Succursale Centre-Ville, Montréal, QC H3T 1J4, Canada.
| | | | - Mickaël Dollé
- Département de Chimie, Université de Montréal, CP6128 Succursale Centre-Ville, Montréal, QC H3T 1J4, Canada.
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13
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Tort S, Mutlu Agardan NB, Han D, Steckl AJ. In vitro and in vivo evaluation of microneedles coated with electrosprayed micro/nanoparticles for medical skin treatments. J Microencapsul 2020; 37:517-527. [DOI: 10.1080/02652048.2020.1809725] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Serdar Tort
- Nanoelectronics Laboratory, Department of Electrical Engineering and Computer Science, University of Cincinnati, Cincinnati, OH, USA
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Gazi University, Ankara, Turkey
| | | | - Daewoo Han
- Nanoelectronics Laboratory, Department of Electrical Engineering and Computer Science, University of Cincinnati, Cincinnati, OH, USA
| | - Andrew J. Steckl
- Nanoelectronics Laboratory, Department of Electrical Engineering and Computer Science, University of Cincinnati, Cincinnati, OH, USA
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14
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Vanza JD, Patel RB, Dave RR, Patel MR. Polyethylene oxide and its controlled release properties in hydrophilic matrix tablets for oral administration. Pharm Dev Technol 2020; 25:1169-1187. [PMID: 32772604 DOI: 10.1080/10837450.2020.1808015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Polymers are excipients that modify the rate of drug release from pharmaceutical dosage forms. Hydrophilic polymer-based controlled drug delivery system is more advantageous as compared to the conventional delivery system as it reduces the dosing frequency, improves therapeutic efficacy, reduces side-effects, and probably enhances patient compliance. Polyethylene oxide (PEO), a nonionic hydrophilic polymer, is one of the most widely used polymers for extending the drug release. This review mainly focuses on the PEO marketed by, but not limited to, The Dow Chemical Company under the trade name of POLYOXTM. It is commercially available polyethylene oxide polymer existing in various molecular weight and viscosity grades depending upon the application. This study essentially discusses chemistry, physicochemical properties, and the impact of formulation and processing variables on the release of drug from hydrophilic PEO matrix tablets. Moreover, it also summarizes the stability, patents, and regulatory perspectives of POLYOX that can further influence the future developments of controlled release dosage forms.
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Affiliation(s)
- Jigar D Vanza
- Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology (CHARUSAT), Changa, India
| | - Rashmin B Patel
- Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology (CHARUSAT), Changa, India
| | - Richa R Dave
- Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology (CHARUSAT), Changa, India
| | - Mrunali R Patel
- Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology (CHARUSAT), Changa, India
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15
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Rapid-Release Griffithsin Fibers for Dual Prevention of HSV-2 and HIV-1 Infections. Antimicrob Agents Chemother 2020; 64:AAC.02139-19. [PMID: 32229493 DOI: 10.1128/aac.02139-19] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 03/21/2020] [Indexed: 12/18/2022] Open
Abstract
The biologic griffithsin (GRFT) has recently emerged as a candidate to safely prevent sexually transmitted infections (STIs), including human immunodeficiency virus type 1 (HIV-1) and herpes simplex virus 2 (HSV-2). However, to date, there are few delivery platforms that are available to effectively deliver biologics to the female reproductive tract (FRT). The goal of this work was to evaluate rapid-release polyethylene oxide (PEO), polyvinyl alcohol (PVA), and polyvinylpyrrolidone (PVP) fibers that incorporate GRFT in in vitro (HIV-1 and HSV-2) and in vivo (HSV-2) infection models. GRFT loading was determined via enzyme-linked immunosorbent assay (ELISA), and the bioactivity of GRFT fibers was assessed using in vitro HIV-1 pseudovirus and HSV-2 plaque assays. Afterwards, the efficacy of GRFT fibers was assessed in a murine model of lethal HSV-2 infection. Finally, murine reproductive tracts and vaginal lavage samples were evaluated for histology and cytokine expression, 24 and 72 h after fiber administration, to determine safety. All rapid-release formulations achieved high levels of GRFT incorporation and were completely efficacious against in vitro HIV-1 and HSV-2 infections. Importantly, all rapid-release GRFT fibers provided potent protection in a murine model of HSV-2 infection. Moreover, histology and cytokine levels, evaluated from collected murine reproductive tissues and vaginal lavage samples treated with blank fibers, showed no increased cytokine production or histological aberrations, demonstrating the preliminary safety of rapid-release GRFT fibers in vaginal tissue.
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16
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Modified release of furosemide from Eudragits® and poly(ethylene oxide)-based matrices and dry-coated tablets. ACTA PHARMACEUTICA (ZAGREB, CROATIA) 2020; 70:49-61. [PMID: 31677367 DOI: 10.2478/acph-2020-0010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/04/2019] [Indexed: 01/19/2023]
Abstract
Modified release of furosemide from tablet formulations is preferred by patients, because of physiological problems, acute diuresis being the most serious, compared to the forms designed for immediate release. With this in view, we aimed at achieving furosemide's longer gastric retention and waste minimization by preparing matrix and compression coated tablets incorporating different grades of Eudragit® and poly(ethylene oxide) (PEO), polyvinylpyrrolidone (PVP) and lactose monohydrate. Dissolution profiles of the new formulations were compared with that of the main stream drug Lasix®, 40 mg tablets. The results indicate that the use of Eudragit® in conjunction with either PVP or lactose monohydrate led to a slower release rate in the intestinal fluids compared to Lasix®. Moreover, furosemide release in the intestinal pH from matrix tablets and compression coated tablets was not noticeably different. Formulations incorporating PEO led to sustained release, in intestinal fluids, which depended on the molecular weight of PEO.
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17
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Feng X, Zidan A, Kamal NS, Xu X, Sun D, Walenga R, Boyce H, Cruz CN, Ashraf M. Assessing Drug Release from Manipulated Abuse Deterrent Formulations. AAPS PharmSciTech 2020; 21:40. [PMID: 31897805 DOI: 10.1208/s12249-019-1595-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 11/27/2019] [Indexed: 01/22/2023] Open
Abstract
There is a need to develop in vitro dissolution methods that discriminate for particle size of the manipulated abuse deterrent formulation (ADF) and that can be used for in vivo predictive models since dissolution methods developed for intact formulation might not be suitable for manipulated ones. A vertical diffusion cell (VDC) and United States Pharmacopeia (USP) Apparatus 1, 2, and 4 were evaluated for measuring the dissolution of intact and manipulated metoprolol succinate tablets with abuse deterrent-like properties. These tablets were physically manipulated to produce fine (106-500 μm) and coarse (500-1000 μm) powder samples. The VDC method was not able to discriminate the effect of particle size on drug release with varied stirring rate (200 to 800 rpm), molecular weight cut-off (MWCO, 3-5 kDa to 12-14 kDa) of the diffusion membrane, or composition and ionic strength (0.45% and 0.9%) of receiver medium. Standard and modified USP Apparatus 1 and 2 methods were assessed; however, large variations (RSD > 20%) were observed with USP Apparatus 1 for manipulated product dissolution and floating powder samples caused failure of auto-sampling when using standard USP Apparatus 2. For the USP Apparatus 4 dissolution method, packing configuration (1, 3, 8 layers and blend), ionic strength of dissolution medium (0.017, 0.077, and 0.154 M additional NaCl), and flow rate (4, 8, 16 mL/min) were studied to discriminate the effect of particle size on release. The USP Apparatus 4 dissolution method was optimized by using a packaging configuration of 8 layers with 8 mL/min flow rate which exhibited low variability and complete drug release and it could be used for in vivo predictive models. The dissolution method variables can be optimized for a specific product for desirable reproducibility and discriminatory power when using USP Apparatus 4.
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18
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Draksler P, Janković B, Abramović Z, Lavrič Z, Meden A. Assessment of critical material attributes of polyethylene oxide for formulation of prolonged-release tablets. Drug Dev Ind Pharm 2019; 45:1949-1958. [PMID: 31752546 DOI: 10.1080/03639045.2019.1689991] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Physicochemical evaluation of polyethylene oxide (PEO) polymers with various molecular weights was performed at molecular (polymeric dispersion) and bulk level (powders, polymeric films, and tablets) with the aim of specifying polymer critical material attributes with the main contribution to drug release from prolonged-release tablets (PRTs). For this purpose, grades of PEO with low, medium, and high viscosity were used for formulating PRTs with a good soluble drug substance (dose solubility volume 15 ml). The results revealed a good correlation (r2=0.88) between in vivo data (pharmacokinetic parameters: Cmax and AUC) and the elastic property of PEO films determined with the nanoindentation method, demonstrating that film level can also be used for the in vivo prediction of drug dissolution. The study confirmed that polymer molecular weight and its viscosity are the most important critical material attributes affecting drug dissolution (in vitro) and in vivo bioavailability (e.g. Cmax and AUC). Our research revealed that the nanoindentation technique can distinguish well between various types of polymers, classifying PEO as the most ductile and polyvinyl alcohol as the most brittle. Finally, our study provides an approach for the determination of exact physical attributes of PEO as a critical material attribute from clinically relevant data, and it therefore fulfills the basic principles of product development by Quality by Design.
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Affiliation(s)
- Petra Draksler
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia.,Sandoz Development Center, Ljubljana, Slovenia
| | - Biljana Janković
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia.,Sandoz Development Center, Ljubljana, Slovenia
| | | | - Zoran Lavrič
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Anton Meden
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
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19
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Fontana A, Guernelli S, Di Crescenzo A, Di Profio P, Palomba F, De Crescentini L, Baschieri A, Amorati R. Cardanol-like co-surfactants solubilized in pegylated micelles keep their antioxidant activity and preserve polyethylene glycol chains from oxidation. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111465] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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20
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Xu X, Siddiqui A, Srinivasan C, Mohammad A, Rahman Z, Korang-Yeboah M, Feng X, Khan M, Ashraf M. Evaluation of Abuse-Deterrent Characteristics of Tablets Prepared via Hot-Melt Extrusion. AAPS PharmSciTech 2019; 20:230. [PMID: 31227939 DOI: 10.1208/s12249-019-1448-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 06/03/2019] [Indexed: 01/28/2023] Open
Abstract
In this study, the effect of formulation variables and process parameters on the abuse-deterrent (AD) characteristics of a matrix tablet manufactured using hot-melt extrusion (HME) was investigated. The formulation variables included polyethylene oxide (PEO) grades and its input level, while the HME process parameters varied were barrel temperature profile and die diameter. Depending on the diameter of the extrudate (2.5 mm or 5.0 mm), two different downstream processes were used to prepare the tablets: cryo-milling followed by compression for the 2.5 mm extrudate, and cutting followed by compression for the 5.0 mm extrudate. A D-optimal statistical design was used to evaluate the impact of formulation and process parameters on various responses, including tablet physical strength, particle size after manipulation, syringeability and injectability, solution viscosity, extractability in solvents, and dissolution rates. It was found that the post-HME extrusion processing method played a critical role in affecting the AD characteristics of abuse-deterrent formulations, likely through changing the tablet compactability and porosity. When the extrudates were cryo-milled-compressed, the tablets could be readily manipulated by milling, which led to high degree of extractability. Under high alcohol concentration, burst drug release was observed for the tablets compressed from cryo-milled extrudates. Additionally, heat exposure during HME process caused significant drop in PEO solution viscosity, likely due to thermal degradation.
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21
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3D printed oral theophylline doses with innovative ‘radiator-like’ design: Impact of polyethylene oxide (PEO) molecular weight. Int J Pharm 2019; 564:98-105. [DOI: 10.1016/j.ijpharm.2019.04.017] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 04/03/2019] [Accepted: 04/06/2019] [Indexed: 01/29/2023]
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22
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Cannuli A, Caccamo MT, Castorina G, Colombo F, Magazù S. Laser Techniques on Acoustically Levitated Droplets. EPJ WEB OF CONFERENCES 2018. [DOI: 10.1051/epjconf/201816705010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
This work reports the results of an experimental study where laser techniques are applied to
acoustically levitated droplets of trehalose aqueous solutions in order to perform spectroscopic analyses as a function of concentration and to test the theoretical diameter law. The study of such systems is important in order to better understand the behaviour of trehalose-synthesizing extremophiles that live in extreme environments. In particular, it will be shown how acoustic levitation, combined with optical spectroscopic instruments allows to explore a wide concentration range and to test the validity of the diameter law as a function of levitation lag time, i.e. the D2 vs t law. On this purpose a direct diameter monitoring by a video camera and a laser pointer was first performed; then the diameter was also evaluated by an indirect measure through an OH/CH band area ratio analysis of collected Raman and Infrared spectra. It clearly emerges that D2 vs t follows a linear trend for about 20 minutes, reaching then a plateau at longer time. This result shows how trehalose is able to avoid total water evaporation, this property being essential for the surviving of organisms under extreme environmental conditions.
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23
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McGinity M, Floyd JR, McGinity J, Zhang F. Implant compositions for the unidirectional delivery of drugs to the brain. Drug Dev Ind Pharm 2017; 43:1421-1429. [DOI: 10.1080/03639045.2017.1318904] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Michael McGinity
- Department of Neurosurgery, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - John R. Floyd
- Department of Neurosurgery, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - James McGinity
- College of Pharmacy, The University of Texas at Austin, Austin, TX, USA
| | - Feng Zhang
- College of Pharmacy, The University of Texas at Austin, Austin, TX, USA
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24
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Cantin O, Siepmann F, Danede F, Willart J, Karrout Y, Siepmann J. PEO hot melt extrudates for controlled drug delivery: Importance of the molecular weight. J Drug Deliv Sci Technol 2016. [DOI: 10.1016/j.jddst.2016.09.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Martin Lo Y, Fermin BC, Weiss LV, Golt C, Yang M, Kuo CF. Menthol as the Flavour Quality Indicator for Tablets Containing Peppermint Oil. FOOD SCI TECHNOL INT 2016. [DOI: 10.1106/108201302028117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
A procedure to assess the flavour quality of water-swellable and soluble tablets containing peppermint oil was developed. Menthol, the predominant ingredient in peppermint oil, was extracted and then analysed using gas chromatography (GC). Sample tablets containing peppermint oil were pulverised, dissolved in double distilled water and then extracted prior to GC analysis. Methyl tert-butyl ether (MTBE) was found to be the most effective amongst the four solvents evaluated for menthol extraction. With the GC column temperature initially held at 60°C for 5 min, a linear program from 60 to 200°C at 4°C/min followed by holding at 200°C for 9 min gave the highest signal-to-noise ratios (SNRs). A discrete peak of menthol was obtained at 19.92 min of retention time. An excellent representation of the total amount of peppermint oil in the tablets was achieved by using the amount of menthol detected by GC, as compared to the results from the Soxhlet method. The most dramatic loss of flavour happened during the first month, whereas only 0.01% reduction was observed afterwards. It is suggested that the proposed procedure could be used for routine quality control of peppermint flavour in water-swellable and soluble tablets.
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Affiliation(s)
- Y. Martin Lo
- Dept. of Nutrition and Food Science, University of Maryland, College Park, MD 20742, USA,
| | - Brenda C. Fermin
- Dept. of Nutrition and Food Science, University of Maryland, College Park, MD 20742, USA
| | - Lori V. Weiss
- Dept. of Animal and Food Sciences, University of Delaware, Newark, DE 19716, USA
| | - C.M. Golt
- Dept. of Plant and Soil Sciences, University of Delaware, Newark, DE 19716, USA
| | - M.L. Yang
- SPI Polyols, New Castle, Delaware 19720, USA
| | - C.-F. Kuo
- Dept. of Foods and Nutrition, Shih Chien University, Taipei, Taiwan
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26
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Jin M, Yu DG, Geraldes CFGC, Williams GR, Bligh SWA. Theranostic Fibers for Simultaneous Imaging and Drug Delivery. Mol Pharm 2016; 13:2457-65. [DOI: 10.1021/acs.molpharmaceut.6b00197] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Miao Jin
- UCL
School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, U.K
| | - Deng-Guang Yu
- School of Materials Science & Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Carlos F. G. C. Geraldes
- Department
of Life Sciences and Coimbra Chemistry Center - CQC, Faculty of Science
and Technology, University of Coimbra, 3000-393 Coimbra, Portugal
| | - Gareth R. Williams
- UCL
School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, U.K
| | - S. W. Annie Bligh
- Department
of Life Sciences, Faculty of Science and Technology, University of Westminster, 115 New Cavendish Street, London W1W 6UW, U.K
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27
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Jin M, Yu DG, Wang X, Geraldes CFGC, Williams GR, Bligh SWA. Electrospun Contrast-Agent-Loaded Fibers for Colon-Targeted MRI. Adv Healthc Mater 2016; 5:977-85. [PMID: 26899401 DOI: 10.1002/adhm.201500872] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 12/23/2015] [Indexed: 01/03/2023]
Abstract
Magnetic resonance imaging is a diagnostic tool used for detecting abnormal organs and tissues, often using Gd(III) complexes as contrast-enhancing agents. In this work, core-shell polymer fibers have been prepared using coaxial electrospinning, with the intent of delivering gadolinium (III) diethylenetriaminepentaacetate hydrate (Gd(DTPA)) selectively to the colon. The fibers comprise a poly(ethylene oxide) (PEO) core loaded with Gd(DTPA), and a Eudragit S100 shell. They are homogeneous, with distinct core-shell phases. The components in the fibers are dispersed in an amorphous fashion. The proton relaxivities of Gd(DTPA) are preserved after electrospinning. To permit easy visualization of the release of the active ingredient from the fibers, analogous materials are prepared loaded with the dye rhodamine B. Very little release is seen in a pH 1.0 buffer, while sustained release is seen at pH 7.4. The fibers thus have the potential to selectively deliver Gd(DTPA) to the colon. Mucoadhesion studies reveal there are strong adhesive forces between porcine colon mucosa and PEO from the core, and the dye-loaded fibers can be successfully used to image the porcine colon wall. The electrospun core-shell fibers prepared in this work can thus be developed as advanced functional materials for effective imaging of colonic abnormalities.
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Affiliation(s)
- Miao Jin
- UCL School of Pharmacy; University College London; 29-39 Brunswick Square; London WC1N 1AX UK
| | - Deng-Guang Yu
- School of Materials Science and Engineering; University of Shanghai for Science and Technology; Shanghai 200093 China
| | - Xia Wang
- School of Materials Science and Engineering; University of Shanghai for Science and Technology; Shanghai 200093 China
| | - Carlos F. G. C. Geraldes
- Department of Life Sciences and Coimbra Chemistry Center - CQC; Faculty of Science and Technology; University of Coimbra; Coimbra 3000-393 Portugal
| | - Gareth R. Williams
- UCL School of Pharmacy; University College London; 29-39 Brunswick Square; London WC1N 1AX UK
| | - S. W. Annie Bligh
- Faculty of Science and Technology; University of Westminster; 115 New Cavendish Street London W1W 6UW UK
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28
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Shojaee S, Emami P, Mahmood A, Rowaiye Y, Dukulay A, Kaialy W, Cumming I, Nokhodchi A. An Investigation on the Effect of Polyethylene Oxide Concentration and Particle Size in Modulating Theophylline Release from Tablet Matrices. AAPS PharmSciTech 2015; 16:1281-9. [PMID: 25771738 PMCID: PMC4666262 DOI: 10.1208/s12249-015-0295-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 01/15/2015] [Indexed: 11/30/2022] Open
Abstract
Polyethylene oxide has been researched extensively as an alternative polymer to hydroxypropyl methylcellulose (HPMC) in controlled drug delivery due to its desirable swelling properties and its availability in a number of different viscosity grades. Previous studies on HPMC have pointed out the importance of particle size on drug release, but as of yet, no studies have investigated the effect of particle size of polyethylene oxide (polyox) on drug release. The present study explored the relationship between polymer level and particle size to sustain the drug release. Tablets produced contained theophylline as their active ingredient and consisted of different polyethylene oxide particle size fractions (20-45, 45-90, 90-180 and 180-425 μm). It was shown that matrices containing smaller particle sizes of polyox produced harder tablets than when larger polyox particles were used. The release studies showed that matrices consisting of large polyox particles showed a faster release rate than matrices made from smaller particles. Molecular weight (MW) of the polymer was a key determining step in attaining sustained release, with the high MW of polyox resulting in a delayed release profile. The results showed that the effect of particle size on drug release was more detrimental when a low concentration of polyox was used. This indicates that care must be taken when low levels of polyox with different particle size fractions are used. More robust formulations could be obtained when the concentration of polyox is high. Differential scanning calorimetry (DSC) traces showed that particle size had no major effect on the thermal behaviour of polyox particles.
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Affiliation(s)
- Saeed Shojaee
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham, ME4 4 TB, UK
| | - Parastou Emami
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham, ME4 4 TB, UK
| | - Ahmad Mahmood
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham, ME4 4 TB, UK
| | - Yemisi Rowaiye
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham, ME4 4 TB, UK
| | - Alusine Dukulay
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham, ME4 4 TB, UK
| | - Waseem Kaialy
- School of Pharmacy, Faculty of Science and Engineering, University of Wolverhampton, Wolverhampton, WV1 1LY, UK
| | - Iain Cumming
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham, ME4 4 TB, UK
| | - Ali Nokhodchi
- School of Life Sciences, University of Sussex, Falmer, Brighton, BN1 9QG, UK.
- Drug Applied Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
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29
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Shojaee S, Emami P, Mahmood A, Rowaiye Y, Dukulay A, Kaialy W, Cumming I, Nokhodchi A. An Investigation on the Effect of Polyethylene Oxide Concentration and Particle Size in Modulating Theophylline Release from Tablet Matrices. AAPS PharmSciTech 2015. [PMID: 25771738 DOI: 10.1208/s12249-015-0295-z.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Polyethylene oxide has been researched extensively as an alternative polymer to hydroxypropyl methylcellulose (HPMC) in controlled drug delivery due to its desirable swelling properties and its availability in a number of different viscosity grades. Previous studies on HPMC have pointed out the importance of particle size on drug release, but as of yet, no studies have investigated the effect of particle size of polyethylene oxide (polyox) on drug release. The present study explored the relationship between polymer level and particle size to sustain the drug release. Tablets produced contained theophylline as their active ingredient and consisted of different polyethylene oxide particle size fractions (20-45, 45-90, 90-180 and 180-425 μm). It was shown that matrices containing smaller particle sizes of polyox produced harder tablets than when larger polyox particles were used. The release studies showed that matrices consisting of large polyox particles showed a faster release rate than matrices made from smaller particles. Molecular weight (MW) of the polymer was a key determining step in attaining sustained release, with the high MW of polyox resulting in a delayed release profile. The results showed that the effect of particle size on drug release was more detrimental when a low concentration of polyox was used. This indicates that care must be taken when low levels of polyox with different particle size fractions are used. More robust formulations could be obtained when the concentration of polyox is high. Differential scanning calorimetry (DSC) traces showed that particle size had no major effect on the thermal behaviour of polyox particles.
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Affiliation(s)
- Saeed Shojaee
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham, ME4 4 TB, UK
| | - Parastou Emami
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham, ME4 4 TB, UK
| | - Ahmad Mahmood
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham, ME4 4 TB, UK
| | - Yemisi Rowaiye
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham, ME4 4 TB, UK
| | - Alusine Dukulay
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham, ME4 4 TB, UK
| | - Waseem Kaialy
- School of Pharmacy, Faculty of Science and Engineering, University of Wolverhampton, Wolverhampton, WV1 1LY, UK
| | - Iain Cumming
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham, ME4 4 TB, UK
| | - Ali Nokhodchi
- School of Life Sciences, University of Sussex, Falmer, Brighton, BN1 9QG, UK. .,Drug Applied Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
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30
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Cassani DAD, Altomare L, De Nardo L, Variola F. Physicochemical and nanomechanical investigation of electrodeposited chitosan:PEO blends. J Mater Chem B 2015; 3:2641-2650. [DOI: 10.1039/c4tb02044h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cathodic electrodeposition is a bottom up process that is emerging as a simple yet efficient strategy to engineer thin polymeric films with well-defined physicochemical properties.
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Affiliation(s)
- Davide A. D. Cassani
- Department of Chemistry
- Materials and Chemical Engineering
- “G. Natta”
- Politecnico di Milano
- Milano
| | | | - Luigi De Nardo
- Department of Chemistry
- Materials and Chemical Engineering
- “G. Natta”
- Politecnico di Milano
- Milano
| | - Fabio Variola
- Department of Mechanical Engineering
- University of Ottawa
- Ottawa
- Canada
- Department of Physics
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31
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Ma L, Deng L, Chen J. Applications of poly(ethylene oxide) in controlled release tablet systems: a review. Drug Dev Ind Pharm 2013; 40:845-51. [DOI: 10.3109/03639045.2013.831438] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Shojaee S, Asare-Addo K, Kaialy W, Nokhodchi A, Cumming I. An investigation into the stabilization of diltiazem HCl release from matrices made from aged polyox powders. AAPS PharmSciTech 2013; 14:1190-8. [PMID: 23900884 PMCID: PMC3755153 DOI: 10.1208/s12249-013-0013-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Accepted: 07/15/2013] [Indexed: 11/30/2022] Open
Abstract
Matrices containing PEO fail to provide stable drug release profiles when stored at elevated temperatures for a period of time. The present study aims to stabilize diltiazem HCl release from matrices made from various molecular weights of polyox powders. To this end, various molecular weights of polyox with and without vitamin E (0.25, 0.5 and 1% w/w) were stored at 40°C for 0, 2, 4 and 8 weeks. The aged polyox powders were then mixed with the model drug at a ratio of 1:1 and compressed into tablets. At different time intervals, the aged polyox with vitamin E were taken out of oven and mixed with the drug (1:1 ratio) and compressed into tablets. Dissolution studies showed a significant increase in diltiazem HCl release rate to occur with increased storage time at 40°C ± 1 from tablets made from the aged polyox (no vitamin E). This was as a result of depolymerization of the aged polyox powders as compared to the fresh polyox samples. This was confirmed by differential scanning calorimetry (DSC) which showed a reduction in the melting point of the aged samples. Concentrations of vitamin E as low as 0.25% w/w was able to overcome the quick release of drug from the matrices made from aged polyox powders. DSC traces showed that the melting point of aged polyox samples containing vitamin E remained the same as that of the fresh samples. The presence of vitamin E is essential to stabilize the drug release from polyox matrices containing diltiazem HCl.
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Affiliation(s)
- Saeed Shojaee
- />Chemistry and Drug Delivery Group, Medway School of Pharmacy, University of Kent, Kent, UK
| | - Kofi Asare-Addo
- />School of Applied Science, University of Huddersfield, Huddersfield, UK
| | - Waseem Kaialy
- />Chemistry and Drug Delivery Group, Medway School of Pharmacy, University of Kent, Kent, UK
- />Pharmaceutics and Pharmaceutical Technology Department, School of Pharmacy, University of Damascus, Damascus, Syria
| | - Ali Nokhodchi
- />Chemistry and Drug Delivery Group, Medway School of Pharmacy, University of Kent, Kent, UK
| | - Iain Cumming
- />Chemistry and Drug Delivery Group, Medway School of Pharmacy, University of Kent, Kent, UK
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The influence of vitamin E succinate on the stability of polyethylene oxide PEO controlled release matrix tablets. Colloids Surf B Biointerfaces 2013; 111:486-92. [PMID: 23880087 DOI: 10.1016/j.colsurfb.2013.06.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Revised: 06/14/2013] [Accepted: 06/18/2013] [Indexed: 11/23/2022]
Abstract
Hydrophilic matrices are a principal technology used for extended release (ER) oral dosage forms and a recent review concluded that their development is currently one of the most important challenges in pharmaceutical research. High molecular weight polyethylene oxides (PEOs) have been proposed as an alternative to hydroxypropylmethylcellulose (HPMC) for the manufacture of controlled release matrix tablets. It is known that PEO's are prone to oxidative degradation which can occur by chain scission and can be catalyzed by metal ions. In this study, we investigated the stability of PEO matrix tablets, of different molecular weight, containing diltiazem hydrochloride, when stored at 40 °C. The results show that there were dramatic increases in the release rate of the diltiazem following storage over only a few weeks, resulting in immediate release profiles after eight weeks, even for the highest molecular weight grade. We employed Gel permeation chromatography (GPC), viscosity and differential scanning calorimetry (DSC) techniques to try and determine the underlying causes of these dramatic shifts in dissolution profiles on storage. The results showed that there were significant decreases in the molecular weight of the PEO's during storage. The second part of the study looked at the addition of three different levels of vitamin E succinate to the tablets. The results clearly demonstrate the ability of the added antioxidant to reverse the significant reductions in molecular weight seen using GPC, viscosity and DSC. Importantly the addition of the antioxidant was able to stabilize the release profile of the diltiazem especially when present at a 1% level. Researchers and those working in pharmaceutical development should be aware of the potential stability risks when making matrix tablets containing PEO's and may wish to consider the addition of an antioxidant to the tablet formulation.
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Agarwal R, Alam MS, Gupta B. Polyvinyl alcohol-polyethylene oxide-carboxymethyl cellulose membranes for drug delivery. J Appl Polym Sci 2013. [DOI: 10.1002/app.39144] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Mejía A, García N, Guzmán J, Tiemblo P. Confinement and nucleation effects in poly(ethylene oxide) melt-compounded with neat and coated sepiolite nanofibers: Modulation of the structure and semicrystalline morphology. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2012.09.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Park JS, Shin JH, Lee DH, Kim MS, Rhee JM, Lee HB, Khang G. A squeeze-type osmotic tablet for controlled delivery of nifedipine. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 19:31-45. [DOI: 10.1163/156856208783227622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Jung Soo Park
- a BK-21 Polymer BIN Fusion Research Team, Chonbuk National University, 664-14 Dukjin, Jeonju 561-756, South Korea
| | - Jun Hyun Shin
- b BK-21 Polymer BIN Fusion Research Team, Chonbuk National University, 664-14 Dukjin, Jeonju 561-756, South Korea
| | - Dong Hun Lee
- c BK-21 Polymer BIN Fusion Research Team, Chonbuk National University, 664-14 Dukjin, Jeonju 561-756, South Korea
| | - Moon Suk Kim
- d Nanobiomaterials Laboratory, Korea Research Institutes of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-606, South Korea
| | - John M. Rhee
- e BK-21 Polymer BIN Fusion Research Team, Chonbuk National University, 664-14 Dukjin, Jeonju 561-756, South Korea
| | - Hai Bang Lee
- f Nanobiomaterials Laboratory, Korea Research Institutes of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-606, South Korea
| | - Gilson Khang
- g BK-21 Polymer BIN Fusion Research Team, Chonbuk National University, 664-14 Dukjin, Jeonju 561-756, South Korea
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Tran PHL, Tran TTD, Park JB, Lee BJ. Controlled Release Systems Containing Solid Dispersions: Strategies and Mechanisms. Pharm Res 2011; 28:2353-78. [DOI: 10.1007/s11095-011-0449-y] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Accepted: 04/07/2011] [Indexed: 10/18/2022]
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Quinten T, De Beer T, Almeida A, Vlassenbroeck J, Van Hoorebeke L, Remon J, Vervaet C. Development and evaluation of injection-molded sustained-release tablets containing ethylcellulose and polyethylene oxide. Drug Dev Ind Pharm 2010; 37:149-59. [DOI: 10.3109/03639045.2010.498426] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Körner A, Larsson A, Andersson Å, Piculell L. Swelling and polymer erosion for poly(ethylene oxide) tablets of different molecular weights polydispersities. J Pharm Sci 2010; 99:1225-38. [DOI: 10.1002/jps.21892] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Yang L, Fassihi R. Accessibility of solid core tablet for dissolution in an asymmetric triple-layer matrix system. J Pharm Pharmacol 2010; 55:1331-7. [PMID: 14607013 DOI: 10.1211/0022357021927] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
The importance of glassy matrix surface area to ensure constant drug release and the effect of barrier layer thickness on the duration of linear release in an asymmetric triple-layer tablet with zero-order release kinetics were investigated. Poly(ethylene oxide) of different molecular weights and hydroxypropylmethylcellulose K4M were the major polymeric constituents, and verapamil hydrochloride was used as a drug model. The contribution of diffusion and polymer relaxation towards drug release was evaluated based on drug release data using a non-linear regression analysis algorithm. The results demonstrated that application of barrier layers to the central core tablet enables polymer relaxation to be the predominant mechanism in controlling drug release and leads to the often desired zero-order release kinetics. The duration of linear release from the asymmetric triple-layer tablet depends on the barrier layer thickness and composition. It was further indicated that the magnitude of diffusion and polymer relaxation in controlling drug release is affected by the accessibility of the drug core tablet for dissolution, as well as the inherent swelling and erosion characteristics of the release rate-controlling polymer.
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Affiliation(s)
- Libo Yang
- Department of Pharmaceutical Sciences, Temple University School of Pharmacy, 3307 N. Broad Street, Philadelphia, PA 19140, USA.
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Mallipeddi R, Saripella KK, Neau SH. Use of coarse ethylcellulose and PEO in beads produced by extrusion–spheronization. Int J Pharm 2010; 385:53-65. [DOI: 10.1016/j.ijpharm.2009.10.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2009] [Revised: 09/28/2009] [Accepted: 10/12/2009] [Indexed: 10/20/2022]
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Körner A, Piculell L, Iselau F, Wittgren B, Larsson A. Influence of different polymer types on the overall release mechanism in hydrophilic matrix tablets. Molecules 2009; 14:2699-716. [PMID: 19701117 PMCID: PMC6255376 DOI: 10.3390/molecules14082699] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Revised: 07/10/2009] [Accepted: 07/15/2009] [Indexed: 11/16/2022] Open
Abstract
The effect of three different types of polymer chain structures on the polymer release from hydrophilic matrix tablets was investigated by comparing a synthetic semi-crystalline linear polymer (PEO), a branched amorphous polysaccharide (dextran) and an amorphous substituted cellulose derivative (HPMC). The polymer release rates for tablets containing mixtures of high and low molecular weight grades in different ratios were determined by using a modified USP II method and a SEC-RI chromatography system. The results showed that independent of polymer type: (i) plots of the release versus time had similar shapes, (ii) the release of long and short polymer chains was equal and no fractionation occurred during the release and (iii) the release rate could be related to the average intrinsic viscosity of the polymer mixtures. This confirms the hypothesis that the release rate can be related to a constant viscosity on the surface of the hydrophilic matrix tablet and that it is valid for all the investigated polymers.
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Affiliation(s)
- Anna Körner
- SCA Hygiene Products, SE-405 03 Göteborg, Sweden; E-mail: (A.K.)
| | - Lennart Piculell
- Department of Physical Chemistry 1, Lund University, Box 124, SE-221 00, Lund, Sweden; E-mail: (L.P.)
| | - Frida Iselau
- AstraZeneca R&D, SE-431 83, Mölndal, Sweden; E-mails: (F.I.), (B.W.)
| | - Bengt Wittgren
- AstraZeneca R&D, SE-431 83, Mölndal, Sweden; E-mails: (F.I.), (B.W.)
| | - Anette Larsson
- Department of Chemistry and Bioengineering, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden
- Author to whom correspondence should be addressed; E-mail:
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Windbergs M, Strachan CJ, Kleinebudde P. Influence of structural variations on drug release from lipid/polyethylene glycol matrices. Eur J Pharm Sci 2009; 37:555-62. [DOI: 10.1016/j.ejps.2009.04.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Revised: 04/14/2009] [Accepted: 04/17/2009] [Indexed: 11/26/2022]
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Zahirul Khan MI. Recent Trends and Progress in Sustained or Controlled Oral Delivery of Some Water Soluble Drugs: Morphine Salts, Diltiazem and Captopril. Drug Dev Ind Pharm 2008. [DOI: 10.3109/03639049509069803] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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45
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Paroxetine hydrochloride controlled release POLYOX® matrix tablets: Screening of formulation variables using Plackett-Burman screening design. Arch Pharm Res 2008; 31:399-405. [DOI: 10.1007/s12272-001-1170-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2007] [Indexed: 11/29/2022]
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Li H, Hardy RJ, Gu X. Effect of drug solubility on polymer hydration and drug dissolution from polyethylene oxide (PEO) matrix tablets. AAPS PharmSciTech 2008; 9:437-43. [PMID: 18431663 DOI: 10.1208/s12249-008-9060-x] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2007] [Accepted: 02/04/2008] [Indexed: 11/30/2022] Open
Abstract
The purpose of the study was to investigate the effect of drug solubility on polymer hydration and drug dissolution from modified release matrix tablets of polyethylene oxide (PEO). Different PEO matrix tablets were prepared using acetaminophen (ACE) and ibuprofen (IBU) as study compounds and Polyox WSR301 (PEO) as primary hydrophilic matrix polymer. Tablet dissolution was tested using the USP Apparatus II, and the hydration of PEO polymer during dissolution was recorded using a texture analyzer. Drug dissolution from the preparations was dependent upon drug solubility, hydrogel formation and polymer proportion in the preparation. Delayed drug release was attributed to the formation of hydrogel layer on the surface of the tablet and the penetration of water into matrix core through drug dissolution and diffusion. A multiple linear regression model could be used to describe the relationship among drug dissolution, polymer ratio, hydrogel formation and drug solubility; the mathematical correlation was also proven to be valid and adaptable to a series of study compounds. The developed methodology would be beneficial to formulation scientists in dosage form design and optimization.
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47
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Li H, Gu X. Correlation between drug dissolution and polymer hydration: A study using texture analysis. Int J Pharm 2007; 342:18-25. [PMID: 17548178 DOI: 10.1016/j.ijpharm.2007.04.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2007] [Revised: 04/09/2007] [Accepted: 04/23/2007] [Indexed: 10/23/2022]
Abstract
Texture analysis is a new approach in pharmaceutical research and development; this study evaluated the correlation between drug dissolution and polymer hydration from a modified release matrix tablet of pseudoephedrine hydrochloride using a texture analyzer. A series of matrix tablets of pseudoephedrine was designed and prepared. Modified drug release was achieved by combined use of matrix excipients Polyox WSR301 (PEO) and Compritol 888ATO (GB). Dissolution profiles of the tablets were assessed using USP Method II. Polymer swelling behaviors during dissolution were measured using a texture analyzer. Increase in proportion of PEO and GB in the formulation reduced drug dissolution within the first 90 min. However, drug release was complete in 6h due to high aqueous solubility of pseudoephedrine. Linear correlations were observed among drug dissolution, polymer content and parameters of texture analysis including hydrogel thickness and AUC(TA) for formulations that contained hydrophilic PEO. The study demonstrated a unique application of a texture analyzer in characterization of modified release matrix tablets.
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Affiliation(s)
- Hongtao Li
- Faculty of Pharmacy, University of Manitoba, 50 Sifton Road, Winnipeg, Manitoba, Canada R3T 2N2
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48
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Abrahmsén-Alami S, Körner A, Nilsson I, Larsson A. New release cell for NMR microimaging of tablets. Int J Pharm 2007; 342:105-14. [PMID: 17580107 DOI: 10.1016/j.ijpharm.2007.05.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2006] [Revised: 03/24/2007] [Accepted: 05/04/2007] [Indexed: 11/17/2022]
Abstract
A small release cell, in the form of a rotating disc, has been constructed to fit into the MRI equipment. The present work show that both qualitative and quantitative information of the swelling and erosion behavior of hydrophilic extended release (ER) matrix tablets may be obtained using this release cell and non-invasive magnetic resonance imaging (MRI) studies at different time-points during matrix dissolution. The tablet size, core size and the gel layer thickness of ER matrix formulations based on poly(ethylene oxide) have been determined. The dimensional changes as a function of time were found to correspond well to observations made with texture analysis (TA) methodology. Most importantly, the results of the present study show that both the erosion (displacement of the gel-dissolution media interface) and the swelling (decrease of dry tablet core size) proceed with a faster rate in radial than in axial direction using the rotating disk set-up. This behavior was attributed to the higher shear forces experienced in the radial direction. The results also indicate that front synchronization (constant gel layer thickness) is associated with the formation of an almost constant polymer concentration profile through the gel layer at different time-points.
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49
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Körner A, Larsson A, Piculell L, Wittgren B. Molecular information on the dissolution of polydisperse polymers: Mixtures of long and short poly(ethylene oxide). J Phys Chem B 2007; 109:11530-7. [PMID: 16852413 DOI: 10.1021/jp044332s] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A systematic study of the dissolution of dry, polydisperse poly(ethylene oxide) (PEO) samples, obtained from mixtures of low-molecular-weight and high-molecular-weight PEO, was made. During the dissolution process, the individual release of the low- and high-molecular-weight fractions was monitored. The high-molecular-weight/low-molecular-weight ratio controls the release rate, and the fraction of high-molecular-weight polymers dominates the effect on the overall release rate in mixed PEO tablets. Both fractions are released at the same rate during the main part of the dissolution process; however, during the initial dissolution period a fractionation occurs. The release rate is not a unique function of the average molecular weight of the polymer, but also depends on the polydispersity. By contrast, the average dimension of a polymer coil, as given by the intrinsic viscosity, gives a good prediction of the release rate irrespective of the polydispersity or details of the molecular weight distribution.
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Affiliation(s)
- Anna Körner
- Department of Physical Chemistry 1, Lund University, Box 124, SE-221 00, Lund, Sweden
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Prodduturi S, Manek RV, Kolling WM, Stodghill SP, Repka MA. Solid-State Stability and Characterization of Hot-Melt Extruded Poly(ethylene oxide) Films. J Pharm Sci 2005; 94:2232-45. [PMID: 16136579 DOI: 10.1002/jps.20437] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Poly(ethylene oxide) (PEO) was used to prepare thin polymer films containing clotrimazole (CT) utilizing hot-melt extrusion (HME) technology. Films containing PEOs of two different molecular weights and the drug were investigated for solid-state characteristics, moisture-sorption, bioadhesivity, mechanical properties, release characteristics, and physical and chemical stability of the drug within the HME films. The solid-state characterization of the drug and the polymer were performed utilizing differential scanning calorimetry and X-ray diffractometry. A Texture analyzer was utilized to study the bioadhesive and mechanical properties of the HME films. Physical and chemical stability of the films, stored at 25 degrees C/60% RH, was studied for up to 12 months. XRD profiles indicated that the drug was physically unstable (recrystallization of the drug occurred) after storage for 3 months at 25 degrees C/60% RH. Based on the DSC studies, it has been proposed that the recrystallization of the drug may be due to the folding (due to HME) and unfolding (upon storage) of the linear PEO chains. Desirable bioadhesive, mechanical, and thermoplastic properties of PEO qualify it as a promising and potential drug carrier. However, further investigation is necessary to enhance the physical stability of these PEO-drug systems.
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Affiliation(s)
- Suneela Prodduturi
- Food and Drug Administration, Division of Pharmaceutical Analysis, St. Louis, Missouri 63101, USA
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