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Palvai S, Kpeglo D, Newham G, Peyman SA, Evans SD, Ong ZY. Free-Standing Hierarchically Porous Silica Nanoparticle Superstructures: Bridging the Nano- to Microscale for Tailorable Delivery of Small and Large Therapeutics. ACS APPLIED MATERIALS & INTERFACES 2024; 16:5568-5581. [PMID: 38270578 PMCID: PMC10859928 DOI: 10.1021/acsami.3c16463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 12/13/2023] [Accepted: 01/08/2024] [Indexed: 01/26/2024]
Abstract
Nanoscale colloidal self-assembly is an exciting approach to yield superstructures with properties distinct from those of individual nanoparticles. However, the bottom-up self-assembly of 3D nanoparticle superstructures typically requires extensive chemical functionalization, harsh conditions, and a long preparation time, which are undesirable for biomedical applications. Here, we report the directional freezing of porous silica nanoparticles (PSiNPs) as a simple and versatile technique to create anisotropic 3D superstructures with hierarchical porosity afforded by microporous PSiNPs and newly generated meso- and macropores between the PSiNPs. By varying the PSiNP building block size, the interparticle pore sizes can be readily tuned. The newly created hierarchical pores greatly augment the loading of a small molecule-anticancer drug, doxorubicin (Dox), and a large macromolecule, lysozyme (Lyz). Importantly, Dox loading into both the micro- and meso/macropores of the nanoparticle assemblies not only gave a pore size-dependent drug release but also significantly extended the drug release to 25 days compared to a much shorter 7 or 11 day drug release from Dox loaded into either the micro- or meso/macropores only. Moreover, a unique temporal drug release profile, with a higher and faster release of Lyz from the larger interparticle macropores than Dox from the smaller PSiNP micropores, was observed. Finally, the formulation of the Dox-loaded superstructures within a composite hydrogel induces prolonged growth inhibition in a 3D spheroid model of pancreatic ductal adenocarcinoma. This study presents a facile modular approach for the rapid assembly of drug-loaded superstructures in fully aqueous environments and demonstrates their potential as highly tailorable and sustained delivery systems for diverse therapeutics.
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Affiliation(s)
- Sandeep Palvai
- School
of Physics and Astronomy, University of
Leeds, Leeds LS2 9JT, U.K.
| | - Delanyo Kpeglo
- School
of Physics and Astronomy, University of
Leeds, Leeds LS2 9JT, U.K.
| | - George Newham
- School
of Physics and Astronomy, University of
Leeds, Leeds LS2 9JT, U.K.
| | - Sally A. Peyman
- School
of Physics and Astronomy, University of
Leeds, Leeds LS2 9JT, U.K.
- Leeds
Institute of Medical Research at St James, School of Medicine, University of Leeds, Leeds LS2 9JT, U.K.
| | - Stephen D. Evans
- School
of Physics and Astronomy, University of
Leeds, Leeds LS2 9JT, U.K.
| | - Zhan Yuin Ong
- School
of Physics and Astronomy, University of
Leeds, Leeds LS2 9JT, U.K.
- Leeds
Institute of Medical Research at St James, School of Medicine, University of Leeds, Leeds LS2 9JT, U.K.
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Balan GA, Precupas A, Matei I. Gelation Behaviour of Pluronic F127/Polysaccharide Systems Revealed via Thioflavin T Fluorescence. Gels 2023; 9:939. [PMID: 38131925 PMCID: PMC10742936 DOI: 10.3390/gels9120939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/27/2023] [Accepted: 11/28/2023] [Indexed: 12/23/2023] Open
Abstract
Fast, reliable methods for characterizing the micelle-to-gel transition in emerging Pluronic F127/polysaccharide materials are essential for tailoring their applications as in situ gelling delivery systems. This study describes a simple fluorimetric method based on the response to gelation of the molecular probe thioflavin T (ThT). The techniques employed are (second derivative) steady-state and synchronous fluorescence. The capabilities of ThT as gelation reporter are tested for three model systems: Pluronic F127 (P16.6%), Pluronic F127/alginate (P16.6%ALG2%) and Pluronic F127/hyaluronic acid (P16.6%HA0.5%). We demonstrate that the changes in the short and long wavelength emissions of ThT allow accurate determination of the critical gelation temperatures in the investigated systems. The spectroscopic data providing information at molecular level are complemented with differential scanning microcalorimetric results revealing additional macroscopic insight into the micellization process. The gelation study is preceded by a solvatochromic analysis of ThT.
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Affiliation(s)
| | | | - Iulia Matei
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania
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3
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Lupu A, Gradinaru LM, Rusu D, Bercea M. Self-Healing of Pluronic® F127 Hydrogels in the Presence of Various Polysaccharides. Gels 2023; 9:719. [PMID: 37754400 PMCID: PMC10528848 DOI: 10.3390/gels9090719] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/01/2023] [Accepted: 09/02/2023] [Indexed: 09/28/2023] Open
Abstract
Thermoresponsive Pluronic® F127 (PL) gels in water were investigated through rheological tests in different shear conditions. The gel strength was tuned with the addition of 1% polysaccharide solution. In the presence of xanthan gum (XG), the viscoelastic behavior of PL-based hydrogels was improved in aqueous environment, but the rheological behavior was less changed with the addition of XG in PBS solutions, whereas in the presence of 0.1 M NaCl, the viscoelastic parameters decreased. PL micellar networks exhibited a self-healing ability, recovering their initial structure after applying cycles of high strain. The rheological characteristics of the PL hydrogel changed with the addition of 1% polysaccharides (xanthan gum, alginate, κ-carrageenan, gellan, or chitosan). PL/polysaccharide systems form temperature-responsive hydrogels with shear thinning behavior, yield stress, and self-healing ability, being considered a versatile platform for injectable biomaterials or bioinks. Thus, in the presence of xanthan gum in aqueous medium, the gel strength was improved after applying a high strain (the values of elastic modulus increased). The other investigated natural polymers induced specific self-healing behaviors. Good performances were observed with the addition of gellan gum, alginate, and κ-carrageenan, but for high values of strain, the ability to recover the initial structure decreased. A modest self-healing behavior was observed in the presence of chitosan and xanthan gum dissolved in NaCl solution.
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Affiliation(s)
- Alexandra Lupu
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (L.M.G.); (D.R.)
| | | | | | - Maria Bercea
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (L.M.G.); (D.R.)
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Jahanbekam S, Mozafari N, Bagheri-Alamooti A, Mohammadi-Samani S, Daneshamooz S, Heidari R, Azarpira N, Ashrafi H, Azadi A. Ultrasound-responsive hyaluronic acid hydrogel of hydrocortisone to treat osteoarthritis. Int J Biol Macromol 2023; 240:124449. [PMID: 37072059 DOI: 10.1016/j.ijbiomac.2023.124449] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 04/10/2023] [Accepted: 04/11/2023] [Indexed: 04/20/2023]
Abstract
One of the practical ways to manage the disease flares of arthritis is using an intra-articular depot formulation of glucocorticoids. Hydrogels, as controllable drug delivery systems, are hydrophilic polymers with distinctive properties, such as remarkable water capacity and biocompatibility. This study aimed to design an injectable thermo-ultrasound-triggered drug carrier based on Pluronic® F-127, hyaluronic acid, and gelatin. The in situ hydrogel loaded by hydrocortison was developed and D-optimal design was used to formulate the process. The optimized hydrogel was combined with four different surfactants to better regulate the release rate. In situ gels composed of the hydrocortisone-loaded hydrogel and hydrocortisone-loaded mixed-micelle hydrogel were characterized. The hydrocortisone-loaded hydrogel and selected hydrocortisone-loaded mixed-micelle hydrogel showed a spherical shape and were nano-sized with a unique thermo-responsive nature able to prolong drug release. The ultrasound-triggered release study showed that drug release was time-dependent. By inducing osteoarthritis in a rat model, behavioral tests and histopathological analyses were carried out on the hydrocortisone-loaded hydrogel and a particular hydrocortisone-loaded mixed-micelle hydrogel. In vivo results showed that the selected hydrocortisone-loaded mixed-micelle hydrogel improved the status of the disease. Results highlighted the potential of ultrasound-responsive in situ-forming hydrogels as hopeful formulas for efficient treatment of arthritis.
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Affiliation(s)
- Sheida Jahanbekam
- Department of Pharmaceutics, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Negin Mozafari
- Department of Pharmaceutics, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Azar Bagheri-Alamooti
- Department of Pharmaceutics, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Soliman Mohammadi-Samani
- Department of Pharmaceutics, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran; Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Saeid Daneshamooz
- Department of Pharmaceutics, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Reza Heidari
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Negar Azarpira
- Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hajar Ashrafi
- Department of Pharmaceutics, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Amir Azadi
- Department of Pharmaceutics, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran; Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
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5
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Li Q, Wang L, Chen F, Constantinou AP, Georgiou TK. Thermoresponsive oligo(ethylene glycol) methyl ether methacrylate based copolymers: composition and comonomer effect. Polym Chem 2022. [DOI: 10.1039/d1py01688a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Thermoresponsive polymers based on oligo(ethylene glycol) (OEG) methyl ether methacrylate monomers from unimers to micelles to precipitation.
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Affiliation(s)
- Qian Li
- Department of Materials, Imperial College London, Royal School of Mines, Exhibition Road, SW7 2AZ, London, UK
| | - Lezhi Wang
- Department of Materials, Imperial College London, Royal School of Mines, Exhibition Road, SW7 2AZ, London, UK
| | - Feihong Chen
- Department of Materials, Imperial College London, Royal School of Mines, Exhibition Road, SW7 2AZ, London, UK
| | - Anna P. Constantinou
- Department of Materials, Imperial College London, Royal School of Mines, Exhibition Road, SW7 2AZ, London, UK
| | - Theoni K. Georgiou
- Department of Materials, Imperial College London, Royal School of Mines, Exhibition Road, SW7 2AZ, London, UK
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Poloxamer 407 Based Gel Formulations for Transungual Delivery of Hydrophobic Drugs: Selection and Optimization of Potential Additives. Polymers (Basel) 2021; 13:polym13193376. [PMID: 34641190 PMCID: PMC8512385 DOI: 10.3390/polym13193376] [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: 09/02/2021] [Revised: 09/23/2021] [Accepted: 09/24/2021] [Indexed: 11/21/2022] Open
Abstract
The current study aimed to develop poloxamer 407 (P407) gel for transungual delivery of antifungal hydrophobic drugs with sufficient gel strength and drug loading. Gel strength and drug loading of P407 gel was improved by use of functional additives. Hydration enhancement effect was used to select optimum nail penetration enhancer. Face-centered central composite design (FCCCD) was used to observe the effect of the selected penetration enhancer (thioglycolic acid (TGA)) and cosolvent (ethanol) on gelation behavior to develop formulation with enough loading of hydrophobic drug, i.e., terbinafine HCl (TBN), and its permeation across the nail plate without compromising on gel strength. It was observed that increasing concentration of P407 and TGA significantly reduced gelation temperature and enhanced the gel strength of P407 gel and can be used to improve P407 gel strength. Under the scanning electron microscope, the significant effect of TGA as an ungual penetration enhancer was observed on the morphology of the nail plate. Optimized P407 gel prepared with modified cold method showed a gelation temperature of 8.7 ± 0.16 °C, gel strength of 122 ± 7.5 s and drug loading of 1.2% w/w, which was four times more than the drug loading in the gels prepared with conventional cold method. Rheological behavior was pseudoplastic with 47.75 ± 3.48% of gel erosion after 12 washings and 67.21 ± 2.16% of drug release after 12 h. A cumulative amount of TBN permeated from P407 gel with and without PE after 24 h was 27.30 ± 4.18 and 16.69 ± 2.31 µg/cm2, respectively. Thioglycolic acid can be used as a nail penetration enhancer without the chemical modification or addition of extra additives while retaining the gel strength. Water miscible cosolvents with moderate evaporability such as ethanol, can be incorporated to P407 gel by minor modification in method of preparation to load the required dose of hydrophobic drugs. Developed P407 gel formulation with sufficient gel strength and drug loading will be a promising carrier for transungual delivery of hydrophobic antifungal agents.
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The Controlled Release and Anti-Inflammatory Activity of a Tetramethylpyrazine-Loaded Thermosensitive Poloxamer Hydrogel. Pharm Res 2019; 36:52. [DOI: 10.1007/s11095-019-2580-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Accepted: 01/22/2019] [Indexed: 11/25/2022]
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Boonlai W, Tantishaiyakul V, Hirun N, Sangfai T, Suknuntha K. Thermosensitive Poloxamer 407/Poly(Acrylic Acid) Hydrogels with Potential Application as Injectable Drug Delivery System. AAPS PharmSciTech 2018; 19:2103-2117. [PMID: 29696613 DOI: 10.1208/s12249-018-1010-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 04/03/2018] [Indexed: 12/26/2022] Open
Abstract
Thermosensitive hydrogels are of great interest for in situ gelling drug delivery. The thermosensitive vehicle with a gelation temperature in a range of 30-36°C would be convenient to be injected as liquid and transform into gel after injection. To prepare novel hydrogels gelling near body temperature, the gelation temperature of poloxamer 407 (PX) were tailored by mixing PX with poly(acrylic acid) (PAA). The gelation behaviors of PX/PAA systems as well as the interaction mechanism were investigated by tube inversion, viscoelastic, shear viscosity, DSC, SEM, and FTIR studies. The gelation temperature of the plain PX solutions at high concentration of 18, 20, and 22% (w/w) gelled at temperature below 28°C, which is out of the suitable temperature range. Mixing PX with PAA to obtain 18 and 20% (w/w) PX with 1% (w/w) PAA increased the gelation temperature to the desired temperature range of 30-36°C. The intermolecular entanglements and hydrogen bonds between PX and PAA may be responsible for the modulation of the gelation features of PX. The mixtures behaved low viscosity liquid at room temperature with shear thinning behavior enabling their injectability and rapidly gelled at body temperature. The gel strength increased, while the pore size decreased with increasing PX concentration. Metronidazole, an antibiotic used for periodontitis, was incorporated into the matrices, and the drug did not hinder their gelling ability. The gels showed the sustained drug release characteristic. The thermosensitive PX/PAA hydrogel could be a promising injectable in situ gelling system for periodontal drug delivery.
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Choi WI, Hwang Y, Sahu A, Min K, Sung D, Tae G, Chang JH. An injectable and physical levan-based hydrogel as a dermal filler for soft tissue augmentation. Biomater Sci 2018; 6:2627-2638. [DOI: 10.1039/c8bm00524a] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A novel levan-based injectable hydrogel was developed as a dermal filler having better in vivo stability and efficacy compared to HA-based hydrogel.
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Affiliation(s)
- Won Il Choi
- Center for Convergence Bioceramic Materials
- Convergence R&D Division
- Korea Institute of Ceramic Engineering and Technology
- Republic of Korea
| | - Youngmin Hwang
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology
- Gwangju 61005
- Republic of Korea
| | - Abhishek Sahu
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology
- Gwangju 61005
- Republic of Korea
| | - Kiyoon Min
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology
- Gwangju 61005
- Republic of Korea
| | - Daekyung Sung
- Center for Convergence Bioceramic Materials
- Convergence R&D Division
- Korea Institute of Ceramic Engineering and Technology
- Republic of Korea
| | - Giyoong Tae
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology
- Gwangju 61005
- Republic of Korea
| | - Jeong Ho Chang
- Center for Convergence Bioceramic Materials
- Convergence R&D Division
- Korea Institute of Ceramic Engineering and Technology
- Republic of Korea
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Boonlai W, Tantishaiyakul V, Hirun N, Phaisan S, Uma T. The effect of the preservative methylparaben on the thermoresponsive gelation behavior of aqueous solutions of poloxamer 407. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.05.120] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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11
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Kim M, Hwang Y, Tae G. The enhanced anti-tissue adhesive effect of injectable pluronic-HA hydrogel by poly(γ-glutamic acid). Int J Biol Macromol 2016; 93:1603-1611. [DOI: 10.1016/j.ijbiomac.2016.02.064] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 02/23/2016] [Accepted: 02/24/2016] [Indexed: 10/22/2022]
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12
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Interactions between a triblock copolymer and hydroxyethyl cellulose in aqueous solution and their use in the solubilization of Amiodarone. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.05.057] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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13
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Poloxamer-hydroxyethyl cellulose-α-cyclodextrin supramolecular gels for sustained release of griseofulvin. Int J Pharm 2016; 500:11-9. [DOI: 10.1016/j.ijpharm.2016.01.015] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 01/07/2016] [Accepted: 01/08/2016] [Indexed: 01/24/2023]
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Fabrication of pluronic and methylcellulose for etidronate delivery and their application for osteogenesis. Int J Pharm 2015; 499:110-118. [PMID: 26748362 DOI: 10.1016/j.ijpharm.2015.12.070] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 12/09/2015] [Accepted: 12/27/2015] [Indexed: 11/23/2022]
Abstract
Novel hydrogels were prepared by blending 4% (w/w) methylcellulose (MC) with various concentrations of 12, 14, 16, 18 and 20% (w/w) pluronic F127 (PF) to form injectable implant drug delivery systems. The blends formed gels using lower concentrations of PF compared to when using PF alone. Etidronate sodium (EDS) at a concentration of 4×10(-3)M was loaded into these blends for producing an osteogenesis effect. The pure gels or EDS loaded gels exhibited cytocompatibility to both the osteoblast (MC3T3-E1) and myoblast (C2C12) cell lines whereas the gels of 16PF, 18PF and 20PF were very cytotoxic to the cells. The EDS loaded gels demonstrated significantly greater alkaline phosphatase (ALP) activities compared to the pure gels. The longer exposure time periods of the samples to the cells, the greater was the ALP activity. These EDS loaded gels significantly increased proliferation of both cell lines thus indicating a bone regeneration effect. The PF/MC blends prolonged the in vitro release of EDS for more than 28 days. Based on the in vitro degradation test, the MC extensively improved the gel strength of the PF and delayed the degradation of the gels thus making them more functional for a sustained drug delivery for osteogenesis.
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Kjøniksen AL, Calejo MT, Zhu K, Nyström B, Sande SA. Stabilization of Pluronic Gels by Hydrophobically Modified Hydroxyethylcellulose. INT J POLYM MATER PO 2014. [DOI: 10.1080/00914037.2014.886245] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Liu C, Mei Q, Zhang J, Kang X, Peng L, Han B, Xue Z, Sang X, Yang X, Wu Z, Li Z, Mo G. CO2as a smart gelator for Pluronic aqueous solutions. Chem Commun (Camb) 2014; 50:14233-6. [DOI: 10.1039/c4cc06623e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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