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Wei Z, Wang S, Hirvonen J, Santos HA, Li W. Microfluidics Fabrication of Micrometer-Sized Hydrogels with Precisely Controlled Geometries for Biomedical Applications. Adv Healthc Mater 2022; 11:e2200846. [PMID: 35678152 DOI: 10.1002/adhm.202200846] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Indexed: 01/24/2023]
Abstract
Micrometer-sized hydrogels are cross-linked three-dimensional network matrices with high-water contents and dimensions ranging from several to hundreds of micrometers. Due to their excellent biocompatibility and capability to mimic physiological microenvironments in vivo, micrometer-sized hydrogels have attracted much attention in the biomedical engineering field. Their biological properties and applications are primarily influenced by their chemical compositions and geometries. However, inhomogeneous morphologies and uncontrollable geometries limit traditional micrometer-sized hydrogels obtained by bulk mixing. In contrast, microfluidic technology holds great potential for the fabrication of micrometer-sized hydrogels since their geometries, sizes, structures, compositions, and physicochemical properties can be precisely manipulated on demand based on the excellent control over fluids. Therefore, micrometer-sized hydrogels fabricated by microfluidic technology have been applied in the biomedical field, including drug encapsulation, cell encapsulation, and tissue engineering. This review introduces micrometer-sized hydrogels with various geometries synthesized by different microfluidic devices, highlighting their advantages in various biomedical applications over those from traditional approaches. Overall, emerging microfluidic technologies enrich the geometries and morphologies of hydrogels and accelerate translation for industrial production and clinical applications.
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Affiliation(s)
- Zhenyang Wei
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, 00014, Finland
| | - Shiqi Wang
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, 00014, Finland
| | - Jouni Hirvonen
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, 00014, Finland
| | - Hélder A Santos
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, 00014, Finland.,Department of Biomedical Engineering, W.J. Kolff Institute for Biomedical Engineering and Materials Science, University Medical Center Groningen/University of Groningen, Ant. Deusinglaan 1, Groningen, 9713 AV, The Netherlands
| | - Wei Li
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, 00014, Finland
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Non-invasive monitoring of in vivo degradation of a radiopaque thermoreversible hydrogel and its efficacy in preventing post-operative adhesions. Acta Biomater 2017; 55:396-409. [PMID: 28363786 DOI: 10.1016/j.actbio.2017.03.042] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 03/07/2017] [Accepted: 03/27/2017] [Indexed: 01/19/2023]
Abstract
In vivo behavior of hydrogel-based biomaterials is very important for rational design of hydrogels for various biomedical applications. Herein, we developed a facile method for in situ fabrication of radiopaque hydrogel. An iodinated functional diblock copolymer of poly(ethylene glycol) and aliphatic polyester was first synthesized by coupling the hydroxyl end of the diblock copolymer with 2,3,5-triiodobenzoic acid (TIB) and then a radiopaque thermoreversible hydrogel was obtained by mixing it with the virgin diblock copolymer. A concentrated aqueous solution of the copolymer blend was injectable at room temperature and spontaneously turned into an in situ hydrogel at body temperature after injection. The introduction of TIB moieties affords the capacity of X-ray opacity, enabling in vivo visualization of the hydrogel using Micro-CT. A rat model with cecum and abdominal defects was utilized to evaluate the efficacy of the radiopaque hydrogel in the prevention of post-operative adhesions, and a significant reduction of the post-operative adhesion formation was confirmed. Meanwhile, the maintenance of the radiopaque hydrogel in the abdomen after administration was non-destructively detected via Micro-CT scanning. The reconstructed three-dimensional images showed that the radiopaque hydrogel with an irregular morphology was located on the injured abdominal wall. The time-dependent profile of the volume of the radiopaque hydrogel determined by Micro-CT imaging was well consistent with the trend obtained from the dissection observation. Therefore, the radiopaque thermoreversible hydrogel can serve as a potential visualized biomedical implant and this practical mixing approach is also useful for further extension into the in vivo monitoring of other biomaterials. STATEMENT OF SIGNIFICANCE While a variety of biomaterials have been extensively studied, it is rare to monitor in vivo degradation and medical efficacy of a material after being implanted deeply into the body. Herein, the radiopaque thermoreversible hydrogel developed by us not only holds desirable performance on the prevention of post-operative abdominal adhesions, but also allows non-invasive monitoring of its in vivo degradation with CT imaging in a real-time, quantitative and three-dimensional manner. The methodology based on CT imaging provides important insights into the in vivo fate of the hydrogel after being deeply implanted into mammals for different biomedical applications and significantly reduces the amount of animals sacrificed.
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Luan J, Cui S, Wang J, Shen W, Yu L, Ding J. Positional isomeric effects of coupling agents on the temperature-induced gelation of triblock copolymer aqueous solutions. Polym Chem 2017. [DOI: 10.1039/c7py00232g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The linking angles of positional isomers in the middle of thermogelling mPEG-PLGA-mPEG polymers were found to affect their microscopic conformations and macroscopic properties.
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Affiliation(s)
- Jiabin Luan
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Shuquan Cui
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Juntao Wang
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Wenjia Shen
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Lin Yu
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Jiandong Ding
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
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Lei K, Ma Q, Yu L, Ding J. Functional biomedical hydrogels for in vivo imaging. J Mater Chem B 2016; 4:7793-7812. [DOI: 10.1039/c6tb02019d] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In vivo imaging of biomedical hydrogels enables real-time and non-invasive visualization of the status of structure and function of hydrogels.
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Affiliation(s)
- Kewen Lei
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Qian Ma
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Lin Yu
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Jiandong Ding
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
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Nguyen QV, Lym JS, Huynh CT, Kim BS, Jae HJ, Kim YI, Lee DS. A novel sulfamethazine-based pH-sensitive copolymer for injectable radiopaque embolic hydrogels with potential application in hepatocellular carcinoma therapy. Polym Chem 2016. [DOI: 10.1039/c6py01141a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
After transcatheter delivery through hepatic artery, a hydrogel can be formed within tumor vasculature by the decrease of environmental pH, block the blood vessel and control the release of loaded anticancer drugs.
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Affiliation(s)
- Quang Vinh Nguyen
- Theranostic Macromolecules Research Center and School of Chemical Engineering
- Sungkyunkwan University
- Suwon
- Korea
| | - Jae Seung Lym
- Theranostic Macromolecules Research Center and School of Chemical Engineering
- Sungkyunkwan University
- Suwon
- Korea
| | - Cong Truc Huynh
- Theranostic Macromolecules Research Center and School of Chemical Engineering
- Sungkyunkwan University
- Suwon
- Korea
- Department of Biomedical Engineering
| | - Bong Sup Kim
- Theranostic Macromolecules Research Center and School of Chemical Engineering
- Sungkyunkwan University
- Suwon
- Korea
| | - Hwan Jun Jae
- Department of Radiology
- Seoul National University Hospital
- Seoul
- Korea
| | - Young Il Kim
- Department of Radiology
- Seoul National University Hospital
- Seoul
- Korea
- Department of Radiology
| | - Doo Sung Lee
- Theranostic Macromolecules Research Center and School of Chemical Engineering
- Sungkyunkwan University
- Suwon
- Korea
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Sustained intra-articular release of celecoxib from in situ forming gels made of acetyl-capped PCLA-PEG-PCLA triblock copolymers in horses. Biomaterials 2015; 53:426-36. [DOI: 10.1016/j.biomaterials.2015.02.109] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 02/24/2015] [Accepted: 02/24/2015] [Indexed: 01/10/2023]
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Petit A, Sandker M, Müller B, Meyboom R, van Midwoud P, Bruin P, Redout EM, Versluijs-Helder M, van der Lest CH, Buwalda SJ, de Leede LG, Vermonden T, Kok RJ, Weinans H, Hennink WE. Release behavior and intra-articular biocompatibility of celecoxib-loaded acetyl-capped PCLA-PEG-PCLA thermogels. Biomaterials 2014; 35:7919-28. [DOI: 10.1016/j.biomaterials.2014.05.064] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 05/21/2014] [Indexed: 01/26/2023]
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Chen J, Zhou R, Li L, Li B, Zhang X, Su J. Mechanical, rheological and release behaviors of a poloxamer 407/ poloxamer 188/carbopol 940 thermosensitive composite hydrogel. Molecules 2013; 18:12415-25. [PMID: 24108402 PMCID: PMC6269880 DOI: 10.3390/molecules181012415] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 09/18/2013] [Accepted: 09/26/2013] [Indexed: 11/17/2022] Open
Abstract
The aims of this study were to prepare a thermosensitive composite hydrogel (TCH) by mixing 24% (w/v) poloxamer 407 (P407), 16% (w/v) poloxamer 188 (P188) and 0.1% (w/v) carbopol 940 (C940), and to determine the effect of natural borneol/ (2-hydroxypropyl)-β-cyclodextrin (NB/HP-β-CD) inclusion complex on the phase transition temperature, mechanical, rheological properties, and release behaviors of the TCH using the tube inversion method, a texture analyzer, a rheometer, and in vitro release , respectively. The results showed that as the concentration of NB/HP-β-CD increased, the phase transition temperature of the TCH was increased from 37.26 to 38.34 °C and the mechanical properties of the TCH showed that the hardness, cohesiveness, strength, and adhesiveness were increased from 0.025 to 0.064 kg, 0.022 to 0.064 kg, 0.110 to 0.307 kg and 0.036 to 0.105 kg, respectively, but the rheological properties of the TCH showed that G', G'' and η were decreased from 7,760 to 157.50 Pa, 1,274 to 36.28 Pa and 1,252 to 25.37 Pas, respectively. The in vitro release showed that an increasing NB/HP-β-CD concentration decreased the release rate of NB from the TCH, but the amount of NB released was more than 96% at 60 min, which showed the TCH had good release behavior.
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Affiliation(s)
- Jianping Chen
- College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, Guangdong, China.
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9
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Sandker MJ, Petit A, Redout EM, Siebelt M, Müller B, Bruin P, Meyboom R, Vermonden T, Hennink WE, Weinans H. In situ forming acyl-capped PCLA–PEG–PCLA triblock copolymer based hydrogels. Biomaterials 2013; 34:8002-11. [DOI: 10.1016/j.biomaterials.2013.07.046] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Accepted: 07/12/2013] [Indexed: 11/25/2022]
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10
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Petit A, Müller B, Meijboom R, Bruin P, van de Manakker F, Versluijs-Helder M, de Leede LGJ, Doornbos A, Landin M, Hennink WE, Vermonden T. Effect of Polymer Composition on Rheological and Degradation Properties of Temperature-Responsive Gelling Systems Composed of Acyl-Capped PCLA-PEG-PCLA. Biomacromolecules 2013; 14:3172-82. [DOI: 10.1021/bm400804w] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Audrey Petit
- InGell Laboratories BV, Groningen, The Netherlands
- Department of Pharmaceutics,
Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Benno Müller
- InGell Laboratories BV, Groningen, The Netherlands
| | | | - Peter Bruin
- InGell Laboratories BV, Groningen, The Netherlands
| | | | - Marjan Versluijs-Helder
- Department of Inorganic Chemistry
and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, The Netherlands
| | | | - Albert Doornbos
- Innocore Technology BV, Zernike Park 6−8, 9747 AN Groningen, The
Netherlands
| | - Mariana Landin
- Departamento
de Farmacia y Tecnología
Farmacéutica, Facultad de Farmacia, Universidad de Santiago, Campus Vida 15782 Santiago de Compostela,
Spain
| | - Wim E. Hennink
- Department of Pharmaceutics,
Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Tina Vermonden
- Department of Pharmaceutics,
Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
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Payyappilly S, Dhara S, Chattopadhyay S. Thermoresponsive biodegradable PEG-PCL-PEG based injectable hydrogel for pulsatile insulin delivery. J Biomed Mater Res A 2013; 102:1500-9. [DOI: 10.1002/jbm.a.34800] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 05/07/2013] [Accepted: 05/09/2013] [Indexed: 01/09/2023]
Affiliation(s)
- Sanal Payyappilly
- Rubber Technology Centre; Indian Institute of Technology; Kharagpur 721302 India
| | - Santanu Dhara
- School of Medical Science and Technology, Indian Institute of Technology; Kharagpur 721302 India
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12
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Petit A, Müller B, Bruin P, Meyboom R, Piest M, Kroon-Batenburg LM, de Leede LG, Hennink WE, Vermonden T. Modulating rheological and degradation properties of temperature-responsive gelling systems composed of blends of PCLA-PEG-PCLA triblock copolymers and their fully hexanoyl-capped derivatives. Acta Biomater 2012; 8:4260-7. [PMID: 22877819 DOI: 10.1016/j.actbio.2012.07.044] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 07/13/2012] [Accepted: 07/31/2012] [Indexed: 11/08/2022]
Abstract
In this study, the ability to modulate rheological and degradation properties of temperature-responsive gelling systems composed of aqueous blends of poly(ε-caprolactone-co-lactide)-b-poly(ethylene glycol)-b-poly(ε-caprolactone-co-lactide) (PCLA-PEG-PCLA) triblock copolymers (i.e. uncapped) and their fully capped derivatives was investigated. Uncapped and capped PCLA-PEG-PCLA triblock copolymers, abbreviated as degree of modification 0 and 2 (DM0 and DM2, respectively), were composed of identical PCLA and PEG blocks but different end groups: namely hydroxyl and hexanoyl end groups. DM0 was synthesized by ring opening polymerization of l-lactide and ε-caprolactone in toluene using PEG as initiator and tin(II) 2-ethylhexanoate as the catalyst. A portion of DM0 was subsequently reacted with an excess of hexanoyl chloride in solution to yield DM2. The cloud point and phase behaviour of DM0 and DM2 in buffer as well as that of their blends were determined by light scattering in a diluted state and by vial tilting and rheological measurements in a concentrated state. Degradation/dissolution properties of temperature-responsive gelling systems were studied in vitro at pH 7.4 and 37°C. The cloud points of DM0/DM2 blends were ratio-dependent and could be tailored from 15 to 40°C for blends containing 15 to 100wt.% DM0. Vial tilting and rheological experiments showed that, with solid contents between 20 and 30wt.%, DM0/DM2 blends (15/85 to 25/75w/w) had a sol-to-gel transition temperature at 10-20°C, whereas blends with less than 15wt.% DM0 formed gels below 4°C and the ones with more than 25wt.% DM0 did not show a sol-to-gel transition up to 50°C. Complete degradation of temperature-responsive gelling systems took ∼100days, independent of the DM0 fraction and the initial solid content. Analysis of residual gels in time by GPC and (1)H-NMR showed no chemical polymer degradation, but indicated gel degradation by dissolution. Preferential dissolution of lactoyl-rich polymers induced enrichment of the residual gels in caproyl-rich polymers. To the best of our knowledge, degradation of temperature-responsive gelling systems by dissolution has not been reported or hypothesized as being the consequence of acylation of polymers. In conclusion, blending of PCLA-PEG-PCLA triblock polymers composed of identical backbones but different end groups provides for a straightforward preparation of temperature-responsive gelling systems with well-characterized rheological properties and potential in drug delivery. Furthermore, acylation of triblock copolymers may allow for the design of bioerodible systems with control over degradation by polymer dissolution.
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Yu L, Sheng W, Yang D, Ding J. Design of molecular parameters to achieve block copolymers with a powder form at dry state and a temperature-induced sol-gel transition in water without unexpected gelling prior to heating. Macromol Res 2012. [DOI: 10.1007/s13233-013-1021-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Garripelli VK, Namgung R, Kim WJ, Jo S. Drug release from a pH-sensitive multiblock co-polymer thermogel. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 23:1505-19. [PMID: 21771392 DOI: 10.1163/092050611x584414] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A Pluronic(®)-based pH-sensitive multiblock co-polymer thermogel has been proposed for sustained release of therapeutic agents. Hydrophobic small-molecule drugs (paclitaxel and camptothecin) and model hy-drophilic macromolecules (fluorescein-labeled dextrans of molecular mass 10, 20, 40, 150 and 250 kDa) were successfully loaded into and released from the thermogels. Drug-loaded polymer solutions were characterized for gelation behavior and micelle size. Drug loading increased the size of the multiblock co-polymer micelles from 20 to 100 nm. The co-polymer improved paclitaxel and camptothecin loading in an aqueous solution by 6900- and 1050-fold, respectively, compared to their solubility in water. The ther-mogels released loaded drugs in a pH-dependent fashion, regardless of their properties. At pH 5.0 and 6.5, paclitaxel and camptothecin completely released in 4 and 15 days, respectively, by a combined mechanism of diffusion and erosion. At neutral pH, diffusion predominated gel erosion to sustain the drug release up to 40 days. Fluorescein-labeled dextran release from the thermogels showed a similar pH-dependent trend as the hydrophobic small molecule drugs. However, dextran release at neutral pH was entirely dependent on the molecular mass of the dextran. Low-molecular-mass (10 and 20 kDa) dextrans were completely released in 12 and 21 days, respectively, while high-molecular-mass (⩾40 kDa) dextrans being continuously released over 36 days, indicating that the threshold of molecular weight necessary for sustained release of a hydrophilic macromolecule from this thermogel (e.g., enzymes, monoclonal antibodies and immunotoxins) is 40 kDa. Taken together, the MBCP thermogel showed potential as a controlled drug-delivery system that showed sustained release of both hydrophilic and lipophilic molecules.
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Affiliation(s)
- Vivek Kumar Garripelli
- a Department of Pharmaceutics, School of Pharmacy , The University of Mississippi , University , MS-38677 , USA
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Abstract
A nanocomposite thermogel composed of Pluronic®-based multiblock copolymer and laponite nanoclay was developed to sustain delivery of low-molecular-weight proteins. The rapid release of low-molecular-weight proteins from multiblock copolymer thermogels has been a problem for sustained delivery but was solved by using nanocomposite thermogel. Lysozyme (Mw = 14,700), a relatively low-molecular-weight protein, was successfully loaded into and released from nanocomposite thermogel. In addition, interactions among multiblock copolymer, laponite, and lysozyme were studied in terms of gelation, micellization, particle size, and zeta potential. Critical micellization temperatures and sol–gel transition temperatures of multiblock copolymer solutions were lowered with laponite addition. Positively charged lysozyme was adsorbed onto anionic surface of laponite, which increased with an increase in the lysozyme concentration. Particle size and zeta potential of the laponite–lysozyme complex were also dependent on the lysozyme concentration. The nanocomposite thermogel sustained lysozyme release to 40 days, whereas lysozyme release from multiblock copolymer thermogel lasted for only 18 days. The structural stability of released lysozyme was confirmed by circular dichroism spectroscopy and differential scanning calorimetry.
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Affiliation(s)
- Vivek K Garripelli
- Department of Pharmaceutics, School of Pharmacy, The University of Mississippi, University, MS, USA
| | - Seongbong Jo
- Department of Pharmaceutics, School of Pharmacy, The University of Mississippi, University, MS, USA
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16
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Affiliation(s)
- Tina Vermonden
- Department of Pharmaceutics, Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands.
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Garripelli VK, Kim JK, Son S, Kim WJ, Repka MA, Jo S. Matrix metalloproteinase-sensitive thermogelling polymer for bioresponsive local drug delivery. Acta Biomater 2011; 7:1984-92. [PMID: 21300184 DOI: 10.1016/j.actbio.2011.02.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Revised: 01/18/2011] [Accepted: 02/02/2011] [Indexed: 10/18/2022]
Abstract
Development of a successful bioresponsive drug delivery system requires exquisite engineering of the materials so that they are able to respond to signals stemming from the physiological environment. In this study we propose a new Pluronic(®) based thermogelling system containing matrix metalloproteinase-2 (MMP2) responsive peptide sequences. A novel thermosensitive multiblock co-polymer comprising an MMP2-labile octapeptide (Gly-Pro-Val-Gly-Leu-Ile-Gly-Lys) was synthesized from a Pluronic(®) triblock co-polymer. The polymer was designed to form a thermogel at body temperature and degrade in the presence of MMP overexpressed in a tumor. The synthesized polymer was a multiblock co-polymer with ∼2.5 U of Pluronic(®). The multiblock co-polymer solutions exhibited reverse thermal gelation around body temperature. The gelation temperatures of the multiblock co-polymer solutions were lower than those of the corresponding Pluronic(®) monomer at a particular concentration. The cytotoxicity of the synthesized polymer was lower compared with the monomer. The solubility of the hydrophobic anticancer drug paclitaxel was enhanced in the polymer solutions by micelle formation. The synthesized polymer was preferentially degraded in the presence of MMP. Paclitaxel release was dependent on the enzyme concentration. These findings suggest that the synthesized polymer has potential as a controlled drug delivery system due to its unique phase transition and bioresponsive behavior.
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Park D, Wu W, Wang Y. A functionalizable reverse thermal gel based on a polyurethane/PEG block copolymer. Biomaterials 2011; 32:777-86. [PMID: 20937526 DOI: 10.1016/j.biomaterials.2010.09.044] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Accepted: 09/19/2010] [Indexed: 11/28/2022]
Abstract
Injectable reverse thermal gels have great potentials as biomaterials for tissue engineering and drug delivery. However, most existing gels lack functional groups that can be modified with biomolecules that can guide cell/material interactions. We created an amine-functionalized ABA block copolymer, poly(ethylene glycol)-poly(serinol hexamethylene urethane), or ESHU. This reverse thermal gel consists of a hydrophobic block (B): poly(serinol hexamethylene urethane) and a hydrophilic block (A): poly(ethylene glycol). The polymer was characterized by GPC, FTIR and (1)H FTNMR. Rheological study demonstrated that ESHU solution in phosphate-buffered saline initiated phase transition at 32 °C and reached maximum elastic modulus at 37 °C. The in vitro degradation tests performed in PBS and cholesterol esterase solutions revealed that the polymer was hydrolyzable and the presence of cholesterol esterase greatly accelerated the hydrolysis. The in vitro cytotoxicity tests carried out using baboon smooth muscle cells demonstrated that ESHU had good cytocompatibility with cell viability indistinguishable from tissue culture treated polystyrene. Subcutaneous implantation in rats revealed well tolerated accurate inflammatory response with moderate ED-1 positive macrophages in the early stages, which largely resolved 4 weeks post-implantation. We functionalized ESHU with a hexapeptide, Ile-Lys-Val-Ala-Val-Ser (IKVAVS), which gelled rapidly at body temperature. We expect this new platform of functionalizable reverse thermal gels to provide versatile biomaterials in tissue engineering and regenerative medicine.
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Affiliation(s)
- Daewon Park
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA
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Kim YT, Shin BK, Garripelli VK, Kim JK, Davaa E, Jo S, Park JS. A thermosensitive vaginal gel formulation with HPγCD for the pH-dependent release and solubilization of amphotericin B. Eur J Pharm Sci 2010; 41:399-406. [DOI: 10.1016/j.ejps.2010.07.009] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Revised: 06/11/2010] [Accepted: 07/14/2010] [Indexed: 10/19/2022]
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Prolongation and enhancement of the anti-apoptotic effects of PTD-Hsp27 fusion proteins using an injectable thermo-reversible gel in a rat myocardial infarction model. J Control Release 2010; 144:181-9. [DOI: 10.1016/j.jconrel.2010.02.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2009] [Accepted: 02/07/2010] [Indexed: 12/31/2022]
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Grondin P, Roubeau O, Castro M, Saadaoui H, Colin A, Clérac R. Multifunctional gels from polymeric spin-crossover metallo-gelators. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:5184-95. [PMID: 20099819 DOI: 10.1021/la903653d] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The gelation abilities toward organic solvents of a series of triazole-based coordination polymers of formula [M(C(n)trz)(3)]A(2) (M = Fe(II) or Zn(II); C(n)trz = 4-n-alkyl-1,2,4-triazole with n = 13, 16, 18; A = monovalent anions, abbreviated as MC(n)A) have been studied to form thermally responsive multifunctional metallogels, in particular for the iron polymers that present the spin-crossover phenomenon. Indeed thermo-reversible physical gels exhibiting thermally reversible magnetic and optical crossovers are formed in decane and toluene. The FeC(18)ptol/decane and FeC(18)ptol/toluene phase diagrams are described (ptol = p-toluene sulfonate anion), together with the rheological properties of the gels determined as a function of the solvent, the gelator concentration as well as temperature. Microscopic observations of the gel structure are correlated to the composition and rheological properties of the gels. Magnetic and thermal studies show that both the gel-liquid and spin-crossover phenomena can be adjusted through the composition of the gel mixture.
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Affiliation(s)
- Pauline Grondin
- CNRS, UPR 8641, Centre de Recherche Paul Pascal, Equipe Matériaux Moléculaires Magnétiques, 115 avenue du Dr. Albert Schweitzer, Pessac, F-33600, France
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Garripelli V, Kim JK, Namgung R, Kim W, Repka M, Jo S. A novel thermosensitive polymer with pH-dependent degradation for drug delivery. Acta Biomater 2010; 6:477-85. [PMID: 19596093 DOI: 10.1016/j.actbio.2009.07.005] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Revised: 06/10/2009] [Accepted: 07/07/2009] [Indexed: 10/20/2022]
Abstract
A class of thermosensitive biodegradable multiblock copolymers with acid-labile acetal linkages were synthesized from Pluronic triblock copolymers (Pluronic P85 and P104) and di-(ethylene glycol) divinyl ether. The novel polymers were engineered to form thermogels at body temperature and degrade in an acidic environment. The Pluronic-based acid-labile polymers were characterized using nuclear magnetic resonance, gel permeation chromatography and differential scanning calorimetry. In vitro biocompatibility of the synthesized polymers was evaluated using calorimetric 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay. The polymers showed reverse thermogelling behavior in water around body temperature. The sol-gel transition temperatures of the polymers synthesized from Pluronic P85 and P104 were lowered from 70.3 to 30 degrees C and from 68.5 to 26.9 degrees C, respectively, when the synthesized polymers were compared with corresponding Pluronic block copolymers at a concentration of 25wt.%. The hydrophobic dye solubilization confirmed the formation of polymeric micelles in the aqueous solution. The sizes of the multiblock copolymers increased on a rise in temperature, indicating that thermal gelation was mediated by micellar aggregation. The thermally driven hydrogels showed preferential polymer degradation at acidic pH. At pH 5.0 and 6.5, the release of 40kDa fluorescein isothiocyanate-dextran (FITC-dextran) from the thermally formed hydrogels was completed within 2 and 9 days, respectively. However, FITC-dextran was continuously released up to 30 days at neutral pH. The mechanism of FITC-dextran release at pH 5.0 was mainly an acid-catalyzed degradation, whereas both diffusion and pH-dependent degradation resulted in FITC-dextran release at pH 6.5. The novel polymers hold great potential as a pH-sensitive controlled drug delivery system owing to their interesting phase transition behavior and biocompatibility.
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Ju XJ, Xie R, Yang L, Chu LY. Biodegradable ‘intelligent’ materials in response to physical stimuli for biomedical applications. Expert Opin Ther Pat 2009; 19:493-507. [DOI: 10.1517/13543770902771282] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Kim JY, Park MH, Joo MK, Lee SY, Jeong B. End Groups Adjusting the Molecular Nano-Assembly Pattern and Thermal Gelation of Polypeptide Block Copolymer Aqueous Solution. Macromolecules 2009. [DOI: 10.1021/ma900341m] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jin Young Kim
- Department of Chemistry and Nano Science, Department of Bioinspired Science, Ewha Womans University, Daehyun-Dong, Seodaemun-Ku, Seoul, 120−750, Korea, Department of Life Science, Department of Bioinspired Science, Ewha Womans University, Daehyun-Dong, Seodaemun-Ku, Seoul, 120−750, Korea
| | - Min Hee Park
- Department of Chemistry and Nano Science, Department of Bioinspired Science, Ewha Womans University, Daehyun-Dong, Seodaemun-Ku, Seoul, 120−750, Korea, Department of Life Science, Department of Bioinspired Science, Ewha Womans University, Daehyun-Dong, Seodaemun-Ku, Seoul, 120−750, Korea
| | - Min Kyung Joo
- Department of Chemistry and Nano Science, Department of Bioinspired Science, Ewha Womans University, Daehyun-Dong, Seodaemun-Ku, Seoul, 120−750, Korea, Department of Life Science, Department of Bioinspired Science, Ewha Womans University, Daehyun-Dong, Seodaemun-Ku, Seoul, 120−750, Korea
| | - Soo Young Lee
- Department of Chemistry and Nano Science, Department of Bioinspired Science, Ewha Womans University, Daehyun-Dong, Seodaemun-Ku, Seoul, 120−750, Korea, Department of Life Science, Department of Bioinspired Science, Ewha Womans University, Daehyun-Dong, Seodaemun-Ku, Seoul, 120−750, Korea
| | - Byeongmoon Jeong
- Department of Chemistry and Nano Science, Department of Bioinspired Science, Ewha Womans University, Daehyun-Dong, Seodaemun-Ku, Seoul, 120−750, Korea, Department of Life Science, Department of Bioinspired Science, Ewha Womans University, Daehyun-Dong, Seodaemun-Ku, Seoul, 120−750, Korea
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Joo MK, Park MH, Choi BG, Jeong B. Reverse thermogelling biodegradable polymer aqueous solutions. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b902208b] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bikram M, West JL. Thermo-responsive systems for controlled drug delivery. Expert Opin Drug Deliv 2008; 5:1077-91. [DOI: 10.1517/17425247.5.10.1077] [Citation(s) in RCA: 126] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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In situ gelling stimuli-sensitive block copolymer hydrogels for drug delivery. J Control Release 2008; 127:189-207. [PMID: 18321604 DOI: 10.1016/j.jconrel.2008.01.005] [Citation(s) in RCA: 593] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2007] [Accepted: 01/15/2008] [Indexed: 11/22/2022]
Abstract
Stimuli-sensitive block copolymer hydrogels, which are reversible polymer networks formed by physical interactions and exhibit a sol-gel phase-transition in response to external stimuli, have great potential in biomedical and pharmaceutical applications, especially in site-specific controlled drug-delivery systems. The drug may be mixed with a polymer solution in vitro and the drug-loaded hydrogel can form in situ after the in vivo administration, such as injection; therefore, stimuli-sensitive block copolymer hydrogels have many advantages, such as simple drug formulation and administration procedures, no organic solvent, site-specificity, a sustained drug release behavior, less systemic toxicity and ability to deliver both hydrophilic and hydrophobic drugs. Among the stimuli in the biomedical applications, temperature and pH are the most popular physical and chemical stimuli, respectively. The temperature- and/or pH-sensitive block copolymer hydrogels for biomedical applications have been extensively developed in the past decade. This review focuses on recent development of the preparation and application for drug delivery of the block copolymer hydrogels that respond to temperature, pH or both stimuli, including poly(N-substituted acrylamide)-based block copolymers, poloxamers and their derivatives, poly(ethylene glycol)-polyester block copolymers, polyelectrolyte-based block copolymers and the polyelectrolyte-modified thermo-sensitive block copolymers. In addition, the hydrogels based on other stimuli-sensitive block copolymers are discussed.
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Kim IY, Yoo MK, Kim BC, Park IY, Lee HC, Cho CS. Thermogelling behaviors of poly(caprolactone-b-ethylene glycol-b-caprolactone) triblock copolymer in the presence of hyaluronic acid. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.22702] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Bikram M, Gobin AM, Whitmire RE, West JL. Temperature-sensitive hydrogels with SiO2–Au nanoshells for controlled drug delivery. J Control Release 2007; 123:219-27. [DOI: 10.1016/j.jconrel.2007.08.013] [Citation(s) in RCA: 196] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2007] [Revised: 08/04/2007] [Accepted: 08/09/2007] [Indexed: 11/30/2022]
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