1
|
Kämmerer PW, Heimes D, Zaage F, Ganz C, Frerich B, Gerber T, Dau M. Improving material properties of a poloxamer P407 hydrogel-based hydroxyapatite bone substitute material by adding silica-A comparative in vivo study. J Biomed Mater Res B Appl Biomater 2024; 112:e35405. [PMID: 38701384 DOI: 10.1002/jbm.b.35405] [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: 10/26/2023] [Revised: 03/05/2024] [Accepted: 04/02/2024] [Indexed: 05/05/2024]
Abstract
The structure and handling properties of a P407 hydrogel-based bone substitute material (BSM) might be affected by different poloxamer P407 and silicon dioxide (SiO2) concentrations. The study aimed to compare the mechanical properties and biological parameters (bone remodeling, BSM degradation) of a hydroxyapatite: silica (HA)-based BSM with various P407 hydrogels in vitro and in an in vivo rat model. Rheological analyses for mechanical properties were performed on one BSM with an SiO2-enriched hydrogel (SPH25) as well on two BSMs with unaltered hydrogels in different gel concentrations (PH25 and PH30). Furthermore, the solubility of all BSMs were tested. In addition, 30 male Wistar rats underwent surgical creation of a well-defined bone defect in the tibia. Defects were filled randomly with PH30 (n = 15) or SPH25 (n = 15). Animals were sacrificed after 12 (n = 5 each), 21 (n = 5 each), and 63 days (n = 5 each). Histological evaluation and histomorphometrical quantification of new bone formation (NB;%), residual BSM (rBSM;%), and soft tissue (ST;%) was conducted. Rheological tests showed an increased viscosity and lower solubility of SPH when compared with the other hydrogels. Histomorphometric analyses in cancellous bone showed a decrease of ST in PH30 (p = .003) and an increase of NB (PH30: p = .001; SPH: p = .014) over time. A comparison of both BSMs revealed no significant differences. The addition of SiO2 to a P407 hydrogel-based hydroxyapatite BSM improves its mechanical stability (viscosity, solubility) while showing similar in vivo healing properties compared to PH30. Additionally, the SiO2-enrichment allows a reduction of poloxamer ratio in the hydrogel without impairing the material properties.
Collapse
Affiliation(s)
- Peer W Kämmerer
- Department of Oral, Maxillofacial Plastic Surgery, University Medical Center Mainz, Mainz, Germany
- Department of Oral, Maxillofacial Plastic Surgery, University Medical Center Rostock, Rostock, Germany
| | - Diana Heimes
- Department of Oral, Maxillofacial Plastic Surgery, University Medical Center Mainz, Mainz, Germany
| | | | - Cornelia Ganz
- Institute of Physics, Rostock University, Rostock, Germany
| | - Bernhard Frerich
- Department of Oral, Maxillofacial Plastic Surgery, University Medical Center Rostock, Rostock, Germany
| | - Thomas Gerber
- Institute of Physics, Rostock University, Rostock, Germany
| | - Michael Dau
- Department of Oral, Maxillofacial Plastic Surgery, University Medical Center Rostock, Rostock, Germany
| |
Collapse
|
2
|
Junnila A, Mortier L, Arbiol A, Harju E, Tomberg T, Hirvonen J, Viitala T, Karttunen AP, Peltonen L. Rheological insights into 3D printing of drug products: Drug nanocrystal-poloxamer gels for semisolid extrusion. Int J Pharm 2024; 655:124070. [PMID: 38554740 DOI: 10.1016/j.ijpharm.2024.124070] [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: 02/06/2024] [Revised: 03/27/2024] [Accepted: 03/27/2024] [Indexed: 04/02/2024]
Abstract
The importance of ink rheology to the outcome of 3D printing is well recognized. However, rheological properties of printing inks containing drug nanocrystals have not been widely investigated. Therefore, the objective of this study was to establish a correlation between the composition of nanocrystal printing ink, the ink rheology, and the entire printing process. Indomethacin was used as a model poorly soluble drug to produce nanosuspensions with improved solubility properties through particle size reduction. The nanosuspensions were further developed into semisolid extrusion 3D printing inks with varying nanocrystal and poloxamer 407 concentrations. Nanocrystals were found to affect the rheological properties of the printing inks both by being less self-supporting and having higher yielding resistances. During printing, nozzle blockages occurred. Nevertheless, all inks were found to be printable. Finally, the rheological properties of the inks were successfully correlated with various printing and product properties. Overall, these experiments shed new light on the rheological properties of printing inks containing nanocrystals.
Collapse
Affiliation(s)
- Atte Junnila
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland.
| | - Laurence Mortier
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland; Laboratory of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Alba Arbiol
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland
| | - Elina Harju
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland
| | - Teemu Tomberg
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland
| | - Jouni Hirvonen
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland
| | - Tapani Viitala
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland; Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
| | - Anssi-Pekka Karttunen
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland
| | - Leena Peltonen
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland
| |
Collapse
|
3
|
Batista JVDC, Matos APS, Oliveria AP, Ricci Júnior E, Freitas ZM, Oliveira CA, Toma HK, Capella MAM, Rocha LM, Weissenstein U, Baumgartner S, Holandino C. Thermoresponsive Hydrogel Containing Viscum album Extract for Topic and Transdermal Use: Development, Stability and Cytotoxicity Activity. Pharmaceutics 2021; 14:pharmaceutics14010037. [PMID: 35056932 PMCID: PMC8780802 DOI: 10.3390/pharmaceutics14010037] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/16/2021] [Accepted: 12/21/2021] [Indexed: 02/07/2023] Open
Abstract
Viscum album L. (Santalaceae), also known as European mistletoe, is a semi-parasitic plant that grows on different host trees. Our group recently demonstrated the antitumoral activity of ethanolic V. album extracts in vitro, depending on the dose and the host tree, V. album ssp abietis from Abies alba being the most active extract. The goal of this work focused on the development of a new topical formulation containing V. album extracts, evaluation of in vitro toxicity and ex vivo skin permeation assays. The Poloxamer 407 hydrogel containing 5% of dry (VA_DEH) or aqueous (VA_AEH) extract presented dermal compatible pH and microbiological stability for 180 days. The hydrogels flow curve presented a non-linear relation, characteristic of non-Newtonian fluids, and the mean viscosity for the VA_DEH and VA_AEH was 372.5 ± 7.78 and 331.0 ± 2.83 Pa.s, respectively, being statistically different (Welch’s t test; p < 0.01). Additionally, WST-1 in vitro assays revealed a dose-dependent toxicity for both formulations and VA_DEH presented a higher activity than the VA_AEH. The promising cytotoxic potential of VA_DEH lead to the ex vivo skin permeation assay with 2.73 ± 0.19 µg/cm2 of chlorogenic acid, which permeated at 8 h, showing a transdermal potential. These in vitro results support the idea that VA_DEH is a novel promising candidate for mistletoe therapy. Therefore, further in vivo and pre-clinical experiments should be performed to evaluate the safety and efficacy of this new dermic delivery system.
Collapse
Affiliation(s)
- João V. D. C. Batista
- Laboratório Multidisciplinar em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (J.V.D.C.B.); (A.P.O.)
- Hiscia Institute, Society for Cancer Research, 4144 Arlesheim, Switzerland;
| | - Ana Paula S. Matos
- Laboratório de Desenvolvimento Galênico, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (A.P.S.M.); (E.R.J.); (Z.M.F.)
| | - Adriana P. Oliveria
- Laboratório Multidisciplinar em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (J.V.D.C.B.); (A.P.O.)
| | - Eduardo Ricci Júnior
- Laboratório de Desenvolvimento Galênico, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (A.P.S.M.); (E.R.J.); (Z.M.F.)
| | - Zaida M. Freitas
- Laboratório de Desenvolvimento Galênico, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (A.P.S.M.); (E.R.J.); (Z.M.F.)
| | - Catarina A. Oliveira
- Laboratório de Alimentos, Instituto Federal de Educacão, Ciência e Tecnologia do Rio de Janeiro, Rio de Janeiro 20270-021, RJ, Brazil;
| | - Helena K. Toma
- Laboratório de Diagnóstico Molecular e Hematologia, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil;
| | - Marcia A. M. Capella
- LaRBio Carlos Chagas Filho, Biophysics Institute, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil;
| | - Leandro M. Rocha
- Laboratório de Tecnologia de Produtos Naturais, Departamento de Tecnologia Farmacêutica, Universidade Federal Fluminense, Niteroi 24241-000, RJ, Brazil;
| | | | - Stephan Baumgartner
- Hiscia Institute, Society for Cancer Research, 4144 Arlesheim, Switzerland;
- Institute of Complementary and Integrative Medicine, University of Bern, 3012 Bern, Switzerland
- Institute for Integrative Medicine, University of Witten/Herdecke, 58455 Herdecke, Germany
- Correspondence: (S.B.); (C.H.)
| | - Carla Holandino
- Laboratório Multidisciplinar em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (J.V.D.C.B.); (A.P.O.)
- Hiscia Institute, Society for Cancer Research, 4144 Arlesheim, Switzerland;
- Correspondence: (S.B.); (C.H.)
| |
Collapse
|
4
|
Caricato D, Primavilla S, Scuota S, Ricci M, Perioli L, Marinozzi M, Giovagnoli S. Rojo Duro Red Onion Extract Loaded Spray Thermogel as a Sustainable Platform for the Treatment of Oral Mucosa Lesions. J Pharm Sci 2021; 110:2974-2985. [PMID: 33865864 DOI: 10.1016/j.xphs.2021.04.004] [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: 01/04/2021] [Revised: 03/30/2021] [Accepted: 04/05/2021] [Indexed: 02/02/2023]
Abstract
The urgent need for new green and sustainable models is ground for the current demand of innovative renewable resource based pharmaceutical products. We propose a Rojo Duro skin onion extract loaded poloxamer/chitosan spray mucoadhesive thermogel aimed at solving current limitations in oral mucosits treatment. Being among the main side effects of radio- and chemotherapy, effective treatment of buccal lesions still represents an unmet medical need. The obtained thermogel combined optimal gelling capacity, release behavior, sprayability, mucoadhesion properties, while maintaining the extract antioxidant and antimicrobial properties. The product preserved all properties when stored for 1 month as a freeze-dried powder at 4 °C. This potential new product is highly translational, as it combines a recognized safety to administration/application advantages, as well as simplicity and sustainability.
Collapse
Affiliation(s)
- Debora Caricato
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123, Perugia, Italy
| | - Sara Primavilla
- Zooprophylactic Institute of Marche and Umbria, via G. Salvemini 1, 06126, Perugia, Italy
| | - Stefania Scuota
- Zooprophylactic Institute of Marche and Umbria, via G. Salvemini 1, 06126, Perugia, Italy
| | - Maurizio Ricci
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123, Perugia, Italy
| | - Luana Perioli
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123, Perugia, Italy
| | - Maura Marinozzi
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123, Perugia, Italy
| | - Stefano Giovagnoli
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123, Perugia, Italy.
| |
Collapse
|
5
|
Williams RMJ, McKeage JW, Ruddy BP, Nielsen PMF, Taberner AJ. Viscous Heating Assists Jet Formation During Needle-Free Jet Injection of Viscous Drugs. IEEE Trans Biomed Eng 2019; 66:3472-3479. [DOI: 10.1109/tbme.2019.2906356] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
6
|
Aljaeid BM, El-Say KM, Hosny KM. Chitosan-TPP nanoparticles stabilized by poloxamer for controlling the release and enhancing the bioavailability of doxazosin mesylate: in vitro, and in vivo evaluation. Drug Dev Ind Pharm 2019; 45:1130-1139. [PMID: 30884977 DOI: 10.1080/03639045.2019.1597105] [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] [Indexed: 10/27/2022]
Abstract
Objective: Control the release and enhance the bioavailability of chitosan-doxazosin mesylate nanoparticles (DM-NPs). Significance: Improve DM bioavailability for the treatment of benign prostatic hyperplasia and hypertension. Methods: Plackett-Burman design was utilized to screen the variables affecting the quality of DM-NPs prepared by ionic gelation method. The investigated variables were initial drug load (X1), chitosan percentage (X2), tripolyphosphate sodium (TPP) percentage (X3), poloxamer percentage (X4), homogenization speed (X5), homogenization time (X6) and TPP addition rate (X7). The prepared DM-loaded NPs have been fully evaluated for particle size (Y1), Zeta potential (Y2), production yield (Y3), entrapment efficiency (Y4), loading capacity (Y5), initial burst (Y6), and cumulative drug release (Y7). Finally, DM pharmacokinetic has been investigated on healthy albino male rabbits by means of non-compartmental analysis. Results: The combination of variables showed variability of Y1, Y2, and Y3 equal to 122-710 nm, 3.49-23.63 mV, and 47.31-92.96%, respectively. While Y4 and Y5, reached 99.87%, and 8.53%, respectively. The prepared NPs revealed that X2, X3, and X4 are the variables that play the important role in controlling the release behavior of DM from the NPs. The in vivo pharmacokinetic results indicated the enhancement in bioavailability of DM by 7 folds compared to drug suspension and the mean residence time prolonged to 23.72 h compared to 4.7 h of drug suspension. Conclusion: The study proved that controlling the release of DM from NPs enhance its bioavailability and improve the compliance of patients with hypertension or benign prostatic hyperplasia.
Collapse
Affiliation(s)
- Bader M Aljaeid
- a Department of Pharmaceutics, Faculty of Pharmacy , King Abdulaziz University , Jeddah , Saudi Arabia
| | - Khalid M El-Say
- a Department of Pharmaceutics, Faculty of Pharmacy , King Abdulaziz University , Jeddah , Saudi Arabia.,b Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy , Al-Azhar University , Cairo , Egypt
| | - Khaled M Hosny
- a Department of Pharmaceutics, Faculty of Pharmacy , King Abdulaziz University , Jeddah , Saudi Arabia.,c Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy , Beni-Suef University , Beni-Suef , Egypt
| |
Collapse
|
7
|
Choi JY, Cho CS, Han YK. Application of thermoreversible hydrogel (poloxamer 407) to protect the corneal endothelium during phacoemulsification in porcine and rabbit eyes. J Cataract Refract Surg 2018; 44:1254-1260. [PMID: 30139637 DOI: 10.1016/j.jcrs.2018.04.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 04/06/2018] [Accepted: 04/20/2018] [Indexed: 11/17/2022]
Abstract
PURPOSE To evaluate the effectiveness of thermoreversible (poloxamer) hydrogels as a substitute for ophthalmic viscosurgical devices (OVDs) during phacoemulsification in porcine and rabbit eyes and compare their endothelial protective effect with that of hyaluronic acid-based OVDs. SETTING Department of Ophthalmology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, South Korea. DESIGN Experimental study. METHODS Fluorescein-stained poloxamer hydrogels (20%, 22%, 24%, and 26% [weight/weight%]) and cohesive (sodium hyaluronate 1.0% [Provisc]) and dispersive (sodium hyaluronate 3.0%-chondroitin sulfate 4.0% [Viscoat]) OVDs were injected into the anterior chamber of porcine eyes incubated at 32°C. In the in vitro study, the retention time was measured in 3 groups of 45 porcine eyes during continuous phacoemulsification. In the in vivo study, the endothelial cell count (ECC) was measured before and 3 days after intermittent phacoemulsification in 12 rabbit eyes randomized to a poloxamer hydrogel or a dispersive OVD group. RESULTS The optimum concentration of thermosensitive hydrogel was 26%, at which no gel-to-sol phase transition occurred in the anterior chamber, with a 21°C irrigation solution. In the in vitro study, the mean retention times were 5.53 seconds ± 1.77 (SD), 125.00 ± 29.34 seconds, and 221.53 ± 42.48 seconds in the cohesive OVD, dispersive OVD, and 26% poloxamer hydrogel groups, respectively (P < .001). Throughout the 5-minute intermittent phacoemulsification, the 26% poloxamer hydrogel remained in the anterior chamber as a semisolid gel. In the in vivo study, the mean decrease in ECC was significantly lower in the 26% poloxamer hydrogel group than in the dispersive OVD group (P = .029). CONCLUSION Thermoreversible hydrogels might be suitable substitutes for hyaluronic acid-based OVDs for corneal endothelial protection during phacoemulsification.
Collapse
Affiliation(s)
- Jung Yeol Choi
- From the Department of Ophthalmology (Choi), Jeju National University School of Medicine, Jeju, the Research Institute for Agriculture and Life Science (Cho), Seoul National University, the Department of Ophthalmology (Han), Seoul Metropolitan Government-Seoul National University Boramae Medical Center, and the Department of Ophthalmology (Han), Seoul National University College of Medicine, Seoul, South Korea
| | - Chong-Su Cho
- From the Department of Ophthalmology (Choi), Jeju National University School of Medicine, Jeju, the Research Institute for Agriculture and Life Science (Cho), Seoul National University, the Department of Ophthalmology (Han), Seoul Metropolitan Government-Seoul National University Boramae Medical Center, and the Department of Ophthalmology (Han), Seoul National University College of Medicine, Seoul, South Korea
| | - Young Keun Han
- From the Department of Ophthalmology (Choi), Jeju National University School of Medicine, Jeju, the Research Institute for Agriculture and Life Science (Cho), Seoul National University, the Department of Ophthalmology (Han), Seoul Metropolitan Government-Seoul National University Boramae Medical Center, and the Department of Ophthalmology (Han), Seoul National University College of Medicine, Seoul, South Korea.
| |
Collapse
|
8
|
Ghaouar N, Baroudi M, Othman T. Contribution to the explanation of the association process of two triblock poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) copolymers and their mixtures in an aqueous solution. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.09.123] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
9
|
Alkhatib Y, Dewaldt M, Moritz S, Nitzsche R, Kralisch D, Fischer D. Controlled extended octenidine release from a bacterial nanocellulose/Poloxamer hybrid system. Eur J Pharm Biopharm 2016; 112:164-176. [PMID: 27889415 DOI: 10.1016/j.ejpb.2016.11.025] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 11/18/2016] [Accepted: 11/21/2016] [Indexed: 12/28/2022]
Abstract
Although bacterial nanocellulose (BNC) has been widely investigated in the last 10years as drug delivery system, up to now no long-term controlled release of drugs could be realized. Therefore, the aim of the present work was the development of a BNC-based drug delivery system that provides prolonged retention time for the antiseptic octenidine up to one week with improved mechanical and antimicrobial properties as well as a high biocompatibility. BNC was modified by incorporation of differently concentrated Poloxamers 338 and 407 as micelles and gels that were extensively investigated regarding size, surface charge, and dynamic viscosity. Depending on type and concentration of the Poloxamer, a retarded octenidine release up to one week could be accomplished. Additionally, superior material properties such as high compression stability and water binding could be achieved. The antimicrobial activity of octenidine against Staphylococcus aureus and Pseudomonas aeruginosa was not changed by the use of Poloxamers. Excellent biocompatibility of the Poloxamer loaded BNC could be demonstrated after local administration in a shell-less hen's egg model. In conclusion, a long-term delivery system consisting of BNC and Poloxamer could be developed for octenidine as a ready-to-use system e.g. for long-term dermal wound treatment.
Collapse
Affiliation(s)
- Y Alkhatib
- Department of Pharmaceutical Technology, Friedrich-Schiller-University Jena, Otto-Schott-Straße 41, 07745 Jena, Germany.
| | - M Dewaldt
- Department of Pharmaceutical Technology, Friedrich-Schiller-University Jena, Otto-Schott-Straße 41, 07745 Jena, Germany.
| | - S Moritz
- Department of Pharmaceutical Technology, Friedrich-Schiller-University Jena, Otto-Schott-Straße 41, 07745 Jena, Germany.
| | - R Nitzsche
- Malvern Instruments GmbH, Rigipsstraße 19, 71083 Herrenberg, Germany.
| | - D Kralisch
- Department of Pharmaceutical Technology, Friedrich-Schiller-University Jena, Otto-Schott-Straße 41, 07745 Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich-Schiller-University Jena, Philosophenweg 7, 07743 Jena, Germany.
| | - D Fischer
- Department of Pharmaceutical Technology, Friedrich-Schiller-University Jena, Otto-Schott-Straße 41, 07745 Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich-Schiller-University Jena, Philosophenweg 7, 07743 Jena, Germany.
| |
Collapse
|
10
|
Formulation, functional evaluation and ex vivo performance of thermoresponsive soluble gels - A platform for therapeutic delivery to mucosal sinus tissue. Eur J Pharm Sci 2016; 96:499-507. [PMID: 27771516 DOI: 10.1016/j.ejps.2016.10.017] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 10/14/2016] [Accepted: 10/17/2016] [Indexed: 11/20/2022]
Abstract
Mucoadhesive in situ gelling systems (soluble gels) have received considerable attention recently as effective stimuli-transforming vectors for a range of drug delivery applications. Considering this fact, the present work involves systematic formulation development, optimization, functional evaluation and ex vivo performance of thermosensitive soluble gels containing dexamethasone 21-phosphate disodium salt (DXN) as the model therapeutic. A series of in situ gel-forming systems comprising the thermoreversible polymer poloxamer-407 (P407), along with hydroxypropyl methyl cellulose (HPMC) and chitosan were first formulated. The optimized soluble gels were evaluated for their potential to promote greater retention at the mucosal surface, for improved therapeutic efficacy, compared to existing solution/suspension-based steroid formulations used clinically. Optimized soluble gels demonstrated a desirable gelation temperature with Newtonian fluid behaviour observed under storage conditions (4-8°C), and pseudoplastic fluid behaviour recorded at nasal cavity/sinus temperature (≈34°C). The in vitro characterization of formulations including rheological evaluation, textural analysis and mucoadhesion studies of the gel form were investigated. Considerable improvement in mechanical properties and mucoadhesion was observed with incorporation of HPMC and chitosan into the gelling systems. The lead poloxamer-based soluble gels, PGHC4 and PGHC7, which were carried through to ex vivo permeation studies displayed extended drug release profiles in conditions mimicking the human nasal cavity, which indicates their suitability for treating a range of conditions affecting the nasal cavity/sinuses.
Collapse
|
11
|
Baloglu E, Karavana SY, Senyigit ZA, Hilmioglu-Polat S, Metin DY, Zekioglu O, Guneri T, Jones DS. In-situ gel formulations of econazole nitrate: preparation and in-vitro and in-vivo evaluation. ACTA ACUST UNITED AC 2011; 63:1274-82. [PMID: 21899542 DOI: 10.1111/j.2042-7158.2011.01315.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVES This study describes the in-situ gelling of econazole nitrate containing thermosensitive polymers composed of poloxamer 407 and 188 as a novel treatment platform for vaginal candidiasis. METHODS Aqueous thermosensitive formulations containing 1% of econazole nitrate and poloxamer 407 and/or 188 were prepared and their rheological, mechanical and drug-release properties determined at 20 ± 0.1°C and/or 37 ± 0.1°C. Based on their biologically suitable thermorheological properties, formulations containing the mixtures of poloxamer 407 and 188 in ratios of 15:15 (F1), 15:20 (F2) and 20:10 (F3) were chosen for comprehensive analysis. KEY FINDINGS Formulations based on F3 exhibited typical gel-type mechanical spectra (G' > G″) at 37°C whereas formulations based on F1 and F2 exhibited properties akin to weakly cross-linked gels. Texture profile analysis demonstrated that F3 showed the highest cohesiveness, adhesiveness, hardness and compressibility. No statistically significant differences (P > 0.5) were observed in the release of econazole nitrate from the formulations at pH 4.5, which in all cases followed anomalous diffusion kinetics. Formulations based on 20% poloxamer 407:10% poloxamer 188 were chosen for in-vivo studies and were shown to be effective for the treatment of the vaginal candidiasis. Histopathologic evaluation also supported the effectiveness of the thermosensitive formulation administered intravaginally. CONCLUSION By careful engineering of the rheological properties, in-situ thermosensitive gel formulations of econazole nitrate were prepared and were shown to be efficacious in the treatment of vaginal candidiasis.
Collapse
Affiliation(s)
- Esra Baloglu
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Ege University, Bornova, İzmir, Turkey.
| | | | | | | | | | | | | | | |
Collapse
|
12
|
Brown AF, Jones DS, Woolfson AD. Thermorheology of polaxamer 407: Effect of alcohols and drugs. J Pharm Pharmacol 2011. [DOI: 10.1111/j.2042-7158.1998.tb02359.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A F Brown
- Pharmaceutical Devices Group, School of Pharmacy, The Queen’s University of Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL
| | - D S Jones
- Pharmaceutical Devices Group, School of Pharmacy, The Queen’s University of Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL
| | - A D Woolfson
- Pharmaceutical Devices Group, School of Pharmacy, The Queen’s University of Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL
| |
Collapse
|
13
|
Baloglu E, Karavana SY, Senyigit ZA, Guneri T. Rheological and mechanical properties of poloxamer mixtures as a mucoadhesive gel base. Pharm Dev Technol 2010; 16:627-36. [PMID: 20715905 DOI: 10.3109/10837450.2010.508074] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study described the thermosensitive formulations composed of poloxamer mixtures for use as drug delivery platform via mucosal route. It also characterized the poloxamer mixtures' rheological, mechanical and mucoadhesive properties. Poloxamer (Plx) 407 and Plx 188 were used alone and together for preparing the mucosal drug delivery platform. The mixtures of Plx 407 and Plx 188 in ratio of 15:15 (F5); 15:20 (F6); 20:10 (F7) existed liquid at room temperature, but gelled at physiological temperature. Flow rheometry studies and oscillatory analysis of each formulation were performed at 20 ± 0.1°C and 37 ± 0.1°C. F5 and F7 formulations exhibited typical gel-type mechanical spectra (G' > G″) after the determined frequency value at 37°C whereas F6 behaved as weakly cross-linked gel. Texture profile analysis presented that F5 and F7 showed similar mechanical properties and can be used as base for mucosal dosage form. Mucoadhesion studies indicated the difference among the formulations and the effect of the mucosal surface on mucoadhesive properties. Mucin disc, bovine vaginal and buccal mucosa were used as mucosal platform for mucoadhesion studies. It is suggested that these investigations may be usefully combined to provide a more rational basis for selecting the ratio of Plx to prepare a topical thermosensitive drug delivery system for mucosal administration.
Collapse
Affiliation(s)
- Esra Baloglu
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Ege University, Bornova, Izmir, Turkey.
| | | | | | | |
Collapse
|
14
|
Rodrigues JDA, Nascimento RSV. Synthesis and rheological behavior of hydrophobically modified block copolymers. J Appl Polym Sci 2010. [DOI: 10.1002/app.31797] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
15
|
Preparation and evaluation of procaine gels for the enhanced local anesthetic action. Arch Pharm Res 2008; 31:235-41. [DOI: 10.1007/s12272-001-1147-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
16
|
Shin SC, Cho CW. Enhanced transdermal delivery of pranoprofen from the bioadhesive gels. Arch Pharm Res 2006; 29:928-33. [PMID: 17121190 DOI: 10.1007/bf02973916] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Percutaneous delivery of NSAIDs has advantages of avoiding hepatic first pass effect and delivering the drug for extended period of time at a sustained, concentrated level at the inflammation site that mainly acts at the joint and the related regions. To develop the new topical formulations of pranoprofen that have suitable bioadhesion, the gel was formulated using hydroxypropyl methylcellulose (HPMC) and poloxamer 407. The effects of temperature on drug release was performed at 32 degrees C, 37 degrees C and 42 degrees C according to drug concentration of 0.04%, 0.08%, 0.12%, 0.16%, and 0.2% (w/w) using synthetic cellulose membrane at 37+/-0.5 degrees C. The increase of temperature showed the increased drug release. The activation energy (Ea), which were calculated from the slope of lop P versus 1000/T plots was 11.22 kcal/ mol for 0.04%, 10.79 kcal/mol for 0.08%, 10.41 kcal/mol for 0.12% and 8.88 kcal/mol for 0.16% loading dose from the pranoprofen gel. To increase the drug permeation, some kinds of penetration enhancers such as the ethylene glycols, the propylene glycols, the glycerides, the non-ionic surfactants and the fatty acids were incorporated in the gel formulation. Among the various enhancers used, propylene glycol mono laurate showed the highest enhancing effects with the enhancement factor of 2.74. The results of this study suggest that development of topical gel formulation of pranoprofen containing an enhancer is feasible.
Collapse
Affiliation(s)
- Sang-Chul Shin
- College of Pharmacy, Chonnam National University, Gwangju 500-757, Korea
| | | |
Collapse
|
17
|
Lee K, Shin SC, Oh I. Fluorescence spectroscopy studies on micellization of poloxamer 407 solution. Arch Pharm Res 2003; 26:653-8. [PMID: 12967202 DOI: 10.1007/bf02976716] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
It has been reported that at low temperature region, poloxamers existed as a monomer. Upon warming, an equilibrium between unimers and micelles was established, and finally micelle aggregates were formed at higher temperature. In this study, the fluorescence spectroscopy was used to study the micelle formation of the poloxamer 407 in aqueous solution. The excitation and emission spectra of pyrene, a fluorescence probe, were measured as a function of the concentration of poloxamer 407 and temperature. A blue shift in the emission spectrum and a red shift in the excitation spectrum were observed as pyrene transferred from an aqueous to a hydrophobic micellar environment. From the I1/I3 and I339/I333 results, critical micelle concentration (cmc) and critical micelle temperature (cmt) were determined. Also, from the fluorescence spectra of the probe molecules such as 8-anilino-1-naphthalene sulfonic acid and 1-pyrenecarboxaldehyde, the blue shift of the lambdamax was observed. These results suggest a decrease in the polarity of the microenvironment around probe because of micelle formation. The poloxamer 407 above cmc strongly complexed with hydrophobic fluorescent probes and the binding constant of complex increased with increasing the hydrophobicity of the probe.
Collapse
Affiliation(s)
- Kayoung Lee
- College of Pharmacy and Research Institute of Drug Development, Chonnam National University, Korea
| | | | | |
Collapse
|
18
|
Shin SC, Cho CW, Oh IJ. Effects of non-ionic surfactants as permeation enhancers towards piroxicam from the poloxamer gel through rat skins. Int J Pharm 2001; 222:199-203. [PMID: 11427350 DOI: 10.1016/s0378-5173(01)00699-8] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The enhancing effects of non-ionic surfactants on the permeation of piroxicam from the poloxamer gels were evaluated using Franz diffusion cells fitted with excised rat skins. The effectiveness of penetration enhancers, the ratio of piroxicam flux in the presence or absence of enhancers, was defined as the enhancement factor. Among the various non-ionic surfactants tested, polyoxyethylene-2-oleyl ether showed the highest enhancing effects with an enhancement factor of 2.84. To elucidate the mechanisms of the action of enhancers, thermal analysis and histological examinations were carried out. Thermal analysis reveals that various surfactants have different fluidizing effects on stratum corneum. Skin pretreated with the poloxamer 407 gels containing various surfactants showed a loosely layered stratum corneum and wide intercellular space.
Collapse
Affiliation(s)
- S C Shin
- College of Pharmacy, Chonnam National University, 500-757, Kwangju, South Korea
| | | | | |
Collapse
|
19
|
Shin SC, Shin EY, Cho CW. Enhancing effects of fatty acids on piroxicam permeation through rat skins. Drug Dev Ind Pharm 2000; 26:563-6. [PMID: 10789070 DOI: 10.1081/ddc-100101269] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
To increase the skin permeation of piroxicam from the Poloxamer 407 gel, fatty acid was added as a penetration enhancer to the Poloxamer 407 gel containing 1% piroxicam. The enhancing effects of the enhancer on the skin permeation of piroxicam were evaluated using Franz diffusion cells fitted with intact excised rat skins. To elucidate the modes of the action of enhancers, thermal analysis and histological examinations were conducted. Among fatty acids tested, linoleic acid showed the highest enhancing effects, with an enhancement factor (EF) of 1.76. From the thermal analysis results, fatty acids have fluidizing effects on the stratum corneum. The skin pretreated with the Poloxamer 407 gels containing piroxicam including linoleic acid showed a loosely layered stratum corneum and wide intercellular space.
Collapse
Affiliation(s)
- S C Shin
- College of Pharmacy, Chonnam National University, Kwangju, Korea
| | | | | |
Collapse
|