51
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The effect of PLGA-based hydrogel scaffold for improving the drug maximum-tolerated dose for in situ osteosarcoma treatment. Colloids Surf B Biointerfaces 2018; 172:387-394. [PMID: 30193198 DOI: 10.1016/j.colsurfb.2018.08.048] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 08/12/2018] [Accepted: 08/22/2018] [Indexed: 01/09/2023]
Abstract
Although hydrogel-based therapeutic agents have shown great potential for localized cancer treatments, the maximum tolerated dose (MTD) of these methods remains uncertain. To confirm this, doxorubicin (DOX) loaded PLGA-PEG-PLGA hydrogel was employed to investigate the MTD of DOX for localized osteosarcoma treatment. This hydrogel showed good injectable and biodegradable properties in vivo. And the drug remaining time was also obviously prolonged in the tumor site. Different doses of DOX (5.0, 15, 30 mg/kg) with/without hydrogel were adopted to the treatment of tumor-bearing mice. Despite both localized administrations of 5.0 mg/kg DOX showing no obvious systemic toxicity, this dose failed to control the persistent growth of tumors or prolong the survival time in comparison with the control groups. Localized administration of 30 mg/kg DOX showed a high efficacy for suppressing tumor growth, but exhibited obvious body weight losing at the same time. Correspondingly, the DOX-loaded hydrogel with the dose of 15 mg/kg achieved significantly improved anti-tumor efficacy and prolonged mean survival time compared with both the free DOX (15 mg/kg) and other control groups. Furthermore, during the whole therapeutic process, the mice showed no obvious body weight loss, major organs damage or death in this group. The MTD of DOX-loaded agent based on the PLGA-PEG-PLGA hydrogel gave a 2-fold increase compared to the MTD of free DOX (7.5 mg/kg, intravenous injection) for the mouse without significant systemic toxicity.
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52
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Onoda M, Ueki T, Tamate R, Akimoto AM, Hall CC, Lodge TP, Yoshida R. Precisely Tunable Sol-Gel Transition Temperature by Blending Thermoresponsive ABC Triblock Terpolymers. ACS Macro Lett 2018; 7:950-955. [PMID: 35650971 DOI: 10.1021/acsmacrolett.8b00477] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Here, we report a facile methodology to control the sol-gel transition temperature (Tgel) of a physically cross-linked hydrogel by blending two kinds of ABC triblock terpolymers. Well-defined triblock terpolymers including thermosensitive N-isopropylacrylamide (NIPAAm), ABC1, and ABC2, were prepared by sequential reversible addition-fragmentation chain transfer polymerization. The chemical structure as well as the molecular weight of the A and B blocks for both polymers are identical, whereas the C blocks are different. The C block of ABC1 (C1) is a statistical copolymer of NIPAAm with hydrophobic n-butyl acrylate (BA), while that of ABC2 (C2) is a PNIPAAm homopolymer. Independently prepared ABC triblock terpolymer solutions exhibit well-defined sol-gel transitions. The Tgel of ABC1 is lower than that of ABC2 since hydrophobic BA is copolymerized into block C1. Remarkably, the Tgel varies linearly within this temperature range by simply blending the two polymers, while the resultant gel strength (∼G') remains almost unchanged. Therefore, the Tgel can be precisely adjusted by the mixing ratio of the two polymers. This method for straightforward manipulation of Tgel has great potential for various soft material applications such as biomaterials for tissue engineering, drug delivery systems, and injectable gels.
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Affiliation(s)
- Michika Onoda
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takeshi Ueki
- International Research Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Ryota Tamate
- Department of Chemistry & Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Aya M. Akimoto
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Cecilia C. Hall
- Department of Chemistry, University of Minnesota, 207 Pleasant Street S.E., Minneapolis, Minnesota 55455, United States
| | - Timothy P. Lodge
- Department of Chemistry, University of Minnesota, 207 Pleasant Street S.E., Minneapolis, Minnesota 55455, United States
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue S.E., Minneapolis, Minnesota 55455, United States
| | - Ryo Yoshida
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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53
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Cui S, Yu L, Ding J. Semi-bald Micelles and Corresponding Percolated Micelle Networks of Thermogels. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01014] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Shuquan Cui
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Lin Yu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Jiandong Ding
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
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54
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Synthesis and hydrogelation of star-shaped poly(l-lysine) polypeptides modified with different functional groups. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.07.051] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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55
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van Midwoud PM, Sandker M, Hennink WE, de Leede LGJ, Chan A, Weinans H. In vivo pharmacokinetics of celecoxib loaded endcapped PCLA-PEG-PCLA thermogels in rats after subcutaneous administration. Eur J Pharm Biopharm 2018; 131:170-177. [PMID: 30075312 DOI: 10.1016/j.ejpb.2018.07.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 07/27/2018] [Accepted: 07/30/2018] [Indexed: 12/16/2022]
Abstract
Injectable thermogels based on poly(ε-caprolactone-co-lactide)-b-poly(ethylene glycol)-b-poly(ε-caprolactone-co-lactide) (PCLA-PEG-PCLA) containing an acetyl- or propyl endcap and loaded with celecoxib were developed for local drug release. The aim of this study was to determine the effects of the composition of the celecoxib/PCLA-PEG-PCLA formulation on their in vivo drug release characteristics. Furthermore, we want to obtain insight into the in vitro-in vivo correlation. Different formulations were injected subcutaneously in rats and blood samples were taken for a period of 8 weeks. Celecoxib half-life in blood increased from 5 h for the bolus injection of celecoxib to more than 10 days for the slowest releasing gel formulation. Sustained release of celecoxib was obtained for at least 8 weeks after subcutaneous administration. The release period was prolonged from 3 to 6-8 weeks by increasing the injected volume from 100 to 500 µL, which also led to higher serum concentrations in time. Propyl endcapping of the polymer also led to a prolonged release compared to the acetyl endcapped polymer (49 versus 21 days) and at equal injected dose of the drug in lower serum concentrations. Increasing the celecoxib loading from 10 mg/mL to 50 mg/mL surprisingly led to prolonged release (28 versus 56 days) as well as higher serum concentrations per time point, even when corrected for the higher dose applied. The in vivo release was about twice as fast compared to the in vitro release for all formulations. Imaging of organs of mice, harvested 15 weeks after subcutaneous injection with polymer solution loaded with infrared-780 labelled dye showed no accumulation in any of these harvested organs except for traces in the kidneys, indicating renal clearance. Due to its simplicity and versatility, this drug delivery system has great potential for designing an injectable to locally treat osteoarthritis, and to enable tuning the gel to meet patient-specific needs.
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Affiliation(s)
| | - Marjan Sandker
- Department of Orthopaedics, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Wim E Hennink
- Department of Pharmaceutics, Utrecht University, The Netherlands
| | | | - Alan Chan
- Percuros BV, Leiden, The Netherlands; Department of Radiology, Leiden University Medical Center, The Netherlands
| | - Harrie Weinans
- Department of Orthopaedics and Department of Rheumatology, UMC Utrecht, The Netherlands; Department of Biomechanical Engineering, TU Delft, The Netherlands
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56
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Yu S, Wang C, Yu J, Wang J, Lu Y, Zhang Y, Zhang X, Hu Q, Sun W, He C, Chen X, Gu Z. Injectable Bioresponsive Gel Depot for Enhanced Immune Checkpoint Blockade. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1801527. [PMID: 29786888 DOI: 10.1002/adma.201801527] [Citation(s) in RCA: 192] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 04/06/2018] [Indexed: 06/08/2023]
Abstract
Although cancer immunotherapy based on immune checkpoint inhibitors holds great promise toward many types of cancers, several challenges still remain, associated with low objective response of patient rate as well as systemic side effects. Here, a combination immunotherapy strategy is developed based on a thermogelling reactive oxygen species (ROS)-responsive polypeptide gel for sustained release of anti-programmed cell death-ligand 1 antibody and dextro-1-methyl tryptophan, inhibitor of indoleamine-2,3-dioxygenase with leveraging the ROS level in the tumor microenvironment. This bioresponsive gel depot can effectively reduce the local ROS level and facilitate release of immunotherapeutics, which leads to enhanced anti-melanoma efficacy in vivo.
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Affiliation(s)
- Shuangjiang Yu
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, 27695, USA
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Chao Wang
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, 27695, USA
| | - Jicheng Yu
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, 27695, USA
| | - Jinqiang Wang
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, 27695, USA
| | - Yue Lu
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, 27695, USA
| | - Yuqi Zhang
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, 27695, USA
| | - Xudong Zhang
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, 27695, USA
| | - Quanyin Hu
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, 27695, USA
| | - Wujin Sun
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, 27695, USA
| | - Chaoliang He
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Xuesi Chen
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Zhen Gu
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, 27695, USA
- Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, NC, 27599, USA
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57
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Liu M, Lu X, Gao L, Wang S, Huo Y, Chen ZN. Polyvinyl Alcohol-Based Thermogel with Tunable Gelation and Self-Healing Property. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201800162] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mengjuan Liu
- School of Chemical Engineering and Light Industry; Department of Applied Chemistry; Guangdong University of Technology; Guangzhou 510006 China
| | - Xiaoxuan Lu
- School of Chemical Engineering and Light Industry; Department of Applied Chemistry; Guangdong University of Technology; Guangzhou 510006 China
| | - Liang Gao
- School of Chemical Engineering and Light Industry; Department of Applied Chemistry; Guangdong University of Technology; Guangzhou 510006 China
| | - Shuting Wang
- School of Chemical Engineering and Light Industry; Department of Applied Chemistry; Guangdong University of Technology; Guangzhou 510006 China
| | - Yanping Huo
- School of Chemical Engineering and Light Industry; Department of Applied Chemistry; Guangdong University of Technology; Guangzhou 510006 China
| | - Zhe-Ning Chen
- Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; 155 Yangqiao Road West Fuzhou 350002 P. R. China
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58
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59
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Li B, Thompson ME. Phase transition in amphiphilic poly(N-isopropylacrylamide): controlled gelation. Phys Chem Chem Phys 2018; 20:13623-13631. [PMID: 29737361 DOI: 10.1039/c8cp01609g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Thermally reversible gelation of polymers is of converging interest in both the fundamental research and practical biomedical or pharmaceutical applications. While the block structure is widely reported to favor gelation, there are few studies regarding the behavior of amphiphilic random copolymers. Herein, hydrophobically modified poly(N-isopropylacrylamide) (pNIPAM) polymers were designed and synthesized by reversible addition-fragmentation chain transfer (RAFT) copolymerization of NIPAM and butyl acrylate (BA). A library of polymer systems was created by varying the BA : NIPAM ratio, molecular weight (Mw) and concentrations. While a coil-to-globule transition induced microphase separation occurred in the dilute solution, diverse phase behaviors were observed by phase diagram study. A transparent gel phase was identified in p(NIPAM-co-BA) systems, which was missing in its block counterpart pNIPAM-b-pBA, and existed over a wider temperature range with increased BA content, Mw and concentrations. A dynamic rheological analysis revealed that the gel properties were strongly dependent on temperature, which regulated the interchain hydrophobic association, and the gel proved to be highly elastic, stable, reversible and self-healable under the optimized conditions. The p(NIPAM-co-BA) system will be highly desirable for injectable in situ forming hydrogel materials, and the study demonstrated here can be potentially extended to other amphiphilic pNIPAM copolymers.
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Affiliation(s)
- Bin Li
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Mark E Thompson
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA and Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, USA.
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60
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Ren H, Chen D, Shi Y, Yu H, Fu Z, Yang W. Charged End-Group Terminated Poly(N-isopropylacrylamide)-b-poly(carboxylic azo) with Unusual Thermoresponsive Behaviors. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02640] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hao Ren
- School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Dong Chen
- School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yan Shi
- School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Haifeng Yu
- Department of Material Science and Engineering, College of Engineering and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China
| | - Zhifeng Fu
- School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Wantai Yang
- School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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61
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Turabee MH, Thambi T, Lym JS, Lee DS. Bioresorbable polypeptide-based comb-polymers efficiently improves the stability and pharmacokinetics of proteins in vivo. Biomater Sci 2018; 5:837-848. [PMID: 28287223 DOI: 10.1039/c7bm00128b] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Stimuli-responsive polypeptides are a promising class of biomaterials due to their tunable physicochemical and biological properties. Herein, a series of novel pH- and thermo-responsive block copolymers based on polypeptides were synthesized by ring-opening polymerization of γ-benzyl-l-glutamate-N-carboxyanhydride in the presence of poly(ethylene glycol)-diamine macroinitiator followed by aminolysis. The resulting polypeptide-based triblock copolymer, poly[(2-(dibutylamino)ethyl-l-glutamate)-co-(γ-benzyl-l-glutamate)]-poly(ethylene glycol)-b-poly[(2-(dibutylamino)ethyl-l-glutamate)-co-(γ-benzyl-l-glutamate)] (PNLG-co-PBLG-b-PEG-b-PBLG-co-PNLG), exists as a low viscous sol at low pH and temperature (≤pH 6.4, 25 °C) but it transforms to a soft gel under physiological conditions (pH 7.4 and 37 °C). The physical properties of the polypeptide gel can be tuned by controlling the ratio between hydrophobic PBLG and pH-sensitive PNLG blocks. The polypeptide-based copolymer did not show any noticeable cytotoxicity to fibroblast cells in vitro. It was found that subcutaneous injection of the polypeptide copolymer solution into the dorsal region of Sprague-Dawley (SD) rats formed a gel instantly without major inflammation. The gels were completely biodegraded in six weeks and found to be bioresorbable. Human growth hormone (hGH)-loaded polypeptide-based biodegradable copolymer sols readily formed a viscoelastic gel that inhibited an initial burst and prolonged the hGH release for one week. Overall, due to their bioresorbable and sustained release protein characteristics, polypeptide hydrogels may serve as viable platforms for therapeutic protein delivery and the surface tunable properties of polypeptide hydrogels can be exploited for other potential therapeutic proteins.
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Affiliation(s)
- Md Hasan Turabee
- School of Chemical Engineering, Theranostic Macromolecules Research Center, Sungkyunkwan University, Suwon, Republic of Korea.
| | - Thavasyappan Thambi
- School of Chemical Engineering, Theranostic Macromolecules Research Center, Sungkyunkwan University, Suwon, Republic of Korea.
| | - Jae Seung Lym
- School of Chemical Engineering, Theranostic Macromolecules Research Center, Sungkyunkwan University, Suwon, Republic of Korea.
| | - Doo Sung Lee
- School of Chemical Engineering, Theranostic Macromolecules Research Center, Sungkyunkwan University, Suwon, Republic of Korea.
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62
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Rao ZK, Chen R, Zhu HY, Li Y, Liu Y, Hao JY. Carboxylic Terminated Thermo-Responsive Copolymer Hydrogel and Improvement in Peptide Release Profile. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E338. [PMID: 29495382 PMCID: PMC5872917 DOI: 10.3390/ma11030338] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 02/22/2018] [Accepted: 02/22/2018] [Indexed: 02/04/2023]
Abstract
To improve the release profile of peptide drugs, thermos-responsive triblock copolymer poly (ε-caprolactone-co-p-dioxanone)-b-poly (ethylene glycol)-b-poly (ε-caprolactone-co-p-dioxanone) (PECP) was prepared and end capped by succinic anhydride to give its carboxylic terminated derivative. Both PCEP block copolymer and its end group modified derivative showed temperature-dependent reversible sol-gel transition in water. The carboxylic end group could significantly decrease the sol-gel transition temperature by nearly 10 °C and strengthen the gel due to enhanced intermolecular force among triblock copolymer chains. Furthermore, compared with the original PECP triblock copolymer, HOOC-PECP-COOH copolymer displayed a retarded and sustained release profile for leuprorelin acetate over one month while effectively avoiding the initial burst. The controlled release was believed to be related to the formation of conjugated copolymer-peptide pair by ionic interaction and enhanced solubility of drug molecules into the hydrophobic domains of the hydrogel. Therefore, carboxyl terminated HOOC-PECP-COOH hydrogel was a promising and well-exhibited sustained release carrier for peptide drugs with the advantage of being able to develop injectable formulation by simple mixing.
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Affiliation(s)
- Zi-Kun Rao
- School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, No.4, Section 2, North Jian'she Road, Chengdu 610054, China.
| | - Rui Chen
- School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, No.4, Section 2, North Jian'she Road, Chengdu 610054, China.
| | - Hong-Yu Zhu
- School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, No.4, Section 2, North Jian'she Road, Chengdu 610054, China.
| | - Yang Li
- School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, No.4, Section 2, North Jian'she Road, Chengdu 610054, China.
| | - Yu Liu
- School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, No.4, Section 2, North Jian'she Road, Chengdu 610054, China.
| | - Jian-Yuan Hao
- School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, No.4, Section 2, North Jian'she Road, Chengdu 610054, China.
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63
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Ko DY, Patel M, Lee HJ, Jeong B. Coordinating Thermogel for Stem Cell Spheroids and Their Cyto-Effectiveness. ADVANCED FUNCTIONAL MATERIALS 2018; 28:1706286. [DOI: 10.1002/adfm.201706286] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Affiliation(s)
- Du Young Ko
- Department of Chemistry and Nanoscience; Ewha Womans University; 52 Ewhayeodae-gil Seodaemun-gu Seoul 03760 Korea
| | - Madhumita Patel
- Department of Chemistry and Nanoscience; Ewha Womans University; 52 Ewhayeodae-gil Seodaemun-gu Seoul 03760 Korea
| | - Hyun Jung Lee
- Department of Chemistry and Nanoscience; Ewha Womans University; 52 Ewhayeodae-gil Seodaemun-gu Seoul 03760 Korea
| | - Byeongmoon Jeong
- Department of Chemistry and Nanoscience; Ewha Womans University; 52 Ewhayeodae-gil Seodaemun-gu Seoul 03760 Korea
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64
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Ruttala HB, Ramasamy T, Madeshwaran T, Hiep TT, Kandasamy U, Oh KT, Choi HG, Yong CS, Kim JO. Emerging potential of stimulus-responsive nanosized anticancer drug delivery systems for systemic applications. Arch Pharm Res 2017; 41:111-129. [DOI: 10.1007/s12272-017-0995-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 11/21/2017] [Indexed: 01/05/2023]
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65
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Thambi T, Li Y, Lee DS. Injectable hydrogels for sustained release of therapeutic agents. J Control Release 2017; 267:57-66. [DOI: 10.1016/j.jconrel.2017.08.006] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 07/31/2017] [Accepted: 08/03/2017] [Indexed: 12/17/2022]
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66
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Liu M, Song X, Wen Y, Zhu JL, Li J. Injectable Thermoresponsive Hydrogel Formed by Alginate-g-Poly(N-isopropylacrylamide) That Releases Doxorubicin-Encapsulated Micelles as a Smart Drug Delivery System. ACS APPLIED MATERIALS & INTERFACES 2017; 9:35673-35682. [PMID: 28937214 DOI: 10.1021/acsami.7b12849] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work, we have synthesized a thermoresponsive copolymer, alginate-g-poly(N-isopropylacrylamide) (alginate-g-PNIPAAm) by conjugating PNIPAAm to alginate, where PNIPAAm with different molecular weights and narrow molecular weight distribution was synthesized by atomic transfer radical polymerization. The copolymer dissolved in water or phosphate-buffered saline buffer solution at room temperature and formed self-assembled micelles with low critical micellization concentrations when the temperature increased to above their critical micellization temperatures. At higher concentration, that is, 7.4 wt % in water, the copolymer formed solutions at 25 °C and turned into thermosensitive hydrogels when temperature increased to the body temperature (37 °C). Herein, we hypothesized that the thermoresponsive hydrogels could produce self-assembled micelles with the dissolution of the alginate-g-PNIPAAm hydrogels in a biological fluid or drug release medium. If the drug was hydrophobic, the hydrogel eventually could release and produce drug-encapsulated micelles. In our experiments, we loaded the anticancer drug doxorubicin (DOX) into the alginate-g-PNIPAAm hydrogels and demonstrated that the hydrogels released DOX-encapsulated micelles in a sustained manner. The slowly released DOX-loaded micelles enhanced the cellular uptake of DOX in multidrug resistant AT3B-1 cells, showing the effect of overcoming the drug resistance and achieving better efficiency for killing the cancer cells. Therefore, the injectable thermoresponsive hydrogels formed by alginate-g-PNIPAAm and loaded with DOX turned into a smart drug delivery system, releasing DOX-encapsulated micelles in a sustained manner, showing great potential for overcoming the drug resistance in cancer therapy.
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Affiliation(s)
- Min Liu
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore , 7 Engineering Drive 1, Singapore 117574, Singapore
- NUS Graduate School for Integrative Sciences & Engineering (NGS), National University of Singapore , 28 Medical Drive, Singapore 117456, Singapore
| | - Xia Song
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore , 7 Engineering Drive 1, Singapore 117574, Singapore
| | - Yuting Wen
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore , 7 Engineering Drive 1, Singapore 117574, Singapore
| | - Jing-Ling Zhu
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore , 7 Engineering Drive 1, Singapore 117574, Singapore
| | - Jun Li
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore , 7 Engineering Drive 1, Singapore 117574, Singapore
- NUS Graduate School for Integrative Sciences & Engineering (NGS), National University of Singapore , 28 Medical Drive, Singapore 117456, Singapore
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Vidyasagar A, Ku SH, Kim M, Kim M, Lee HS, Pearce TR, McCormick AV, Bates FS, Kokkoli E. Design and Characterization of a PVLA-PEG-PVLA Thermosensitive and Biodegradable Hydrogel. ACS Macro Lett 2017; 6:1134-1139. [PMID: 35650931 DOI: 10.1021/acsmacrolett.7b00523] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A set of poly(δ-valerolactone-co-d,l-lactide)-b-poly(ethylene glycol)-b-poly(δ-valerolactone-co-d,l-lactide) (PVLA-PEG-PVLA) triblock copolymers was synthesized and the solution properties were characterized using rheology, cryo-TEM, cryo-SEM, SANS, and degradation studies. This polymer self-assembles into a low viscosity fluid with flowerlike spherical micelles in water at room temperature and transforms into a wormlike morphology upon heating, accompanied by gelation. At even higher temperatures syneresis is observed. At physiological temperature (37 °C) the hydrogel's average pore size is around 600 nm. The PVLA-PEG-PVLA gel degrades in about 45 days in cell media, making this unique hydrogel a promising candidate for biomedical applications.
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Affiliation(s)
- Ajay Vidyasagar
- Department
of Chemical Engineering and Materials Science and ∥Department of
Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Sook Hee Ku
- Department
of Chemical Engineering and Materials Science and ∥Department of
Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Minchul Kim
- Department
of Chemical Engineering and Materials Science and ∥Department of
Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Mihee Kim
- Department
of Chemical Engineering and Materials Science and ∥Department of
Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Han Seung Lee
- Department
of Chemical Engineering and Materials Science and ∥Department of
Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Timothy R. Pearce
- Department
of Chemical Engineering and Materials Science and ∥Department of
Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Alon V. McCormick
- Department
of Chemical Engineering and Materials Science and ∥Department of
Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Frank S. Bates
- Department
of Chemical Engineering and Materials Science and ∥Department of
Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Efrosini Kokkoli
- Department
of Chemical Engineering and Materials Science and ∥Department of
Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
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68
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Nagasaki Y, Mizukoshi Y, Gao Z, Feliciano CP, Chang K, Sekiyama H, Kimura H. Development of a local anesthetic lidocaine-loaded redox-active injectable gel for postoperative pain management. Acta Biomater 2017; 57:127-135. [PMID: 28457963 DOI: 10.1016/j.actbio.2017.04.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 04/12/2017] [Accepted: 04/26/2017] [Indexed: 12/15/2022]
Abstract
Although local anesthesia is commonly applied for pain relief, there are several issues such as its short duration of action and low effectiveness at the areas of inflammation due to the acidic pH. The presence of excessive amount of reactive oxygen species (ROS) is known to induce inflammation and aggravate pain. To resolve these issues, we developed a redox-active injectable gel (RIG) with ROS-scavenging activity. RIG was prepared by mixing polyamine-b-poly(ethylene glycol)-b-polyamine with nitroxide radical moieties as side chains on the polyamine segments (PMNT-b-PEG-b-PMNT) with a polyanion, which formed a flower-type micelle via electrostatic complexation. Lidocaine could be stably incorporated in its core. When the temperature of the solution was increased to 37°C, the PIC-type flower micelle transformed to gel. The continuous release of lidocaine from the gel was observed for more than three days, without remarkable initial burst, which is probably owing to the stable entrapment of lidocaine in the PIC core of the gel. We evaluated the analgesic effect of RIG in carrageenan-induced arthritis mouse model. Results showed that lidocaine-loaded RIG has stronger and longer analgesic effect when administered in inflamed areas. In contrast, while the use of non-complexed lidocaine did not show analgesic effect one day after its administration. Note that no effect was observed when PIC-type flower micelle without ROS-scavenging ability was used. These findings suggest that local anesthetic-loaded RIG can effectively reduce the number of injection times and limit the side effects associated with the use of anti-inflammatory drugs for postoperative pain management. STATEMENT OF SIGNIFICANCE 1. We have been working on nanomaterials, which effectively eliminate ROS, avoiding dysfunction of mitochondria in healthy cells. 2. We designed redox injectable gel using polyion complexed flower type micelle, which can eliminates ROS locally. 3. We could prepare local anesthesia-loaded redox injectable gel (lido@RIG). 4. Drug release could be extended by local administration of lido@RIG. 5. Deprotonation of lidocaine improved anesthetic effect because ROS were eliminated locally by RIG. 6. Local inflammation could be also suppressed by lido@RIG.
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Affiliation(s)
- Yukio Nagasaki
- Department of Material Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan; Master's School of Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan; Satellite Laboratory, International Center of Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan.
| | - Yutaro Mizukoshi
- Department of Material Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan
| | - Zhenyu Gao
- Department of Material Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan
| | - Chitho P Feliciano
- Department of Material Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan; Biomedical Research Section, Atomic Research Division, Philippine Nuclear Research Institute, Department of Science and Technology (PNRI-DOST), Commonwealth Avenue, Diliman, Quezon City, Philippines
| | - Kyungho Chang
- Department of Medical Engineering, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Hiroshi Sekiyama
- Department of Anesthesiology, Teikyo University School of Medicine, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - Hiroyuki Kimura
- Department of Analytical and Bioinorganic Chemistry, Kyoto Pharmaceutical University, Misasagi-Nakauchicho 5, Yamashinaku, Kyoto 607-8414, Japan
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69
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Huang P, Song H, Zhang Y, Liu J, Cheng Z, Liang XJ, Wang W, Kong D, Liu J. FRET-enabled monitoring of the thermosensitive nanoscale assembly of polymeric micelles into macroscale hydrogel and sequential cognate micelles release. Biomaterials 2017; 145:81-91. [PMID: 28858720 DOI: 10.1016/j.biomaterials.2017.07.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 07/04/2017] [Accepted: 07/09/2017] [Indexed: 01/02/2023]
Abstract
Thermosensitive "micellar hydrogel" is prepared based on poly(ε-caprolactone-co- 1,4,8-trioxa[4.6]spiro-9-undecanone)-b-poly(ethylene glycol)- b-poly(ε-caprolactone- co-1,4,8-trioxa[4.6]spiro-9-undecanone) (PECT) triblock copolymer. Fluorescence resonance energy transfer (FRET) is adopted to explore its assembly (formation) and disassembly (degradation) mechanism within the range of 10 nm. Results prove that the thermosensitive non-covalent aggregation of micelles facilitates the hydrogel formation and the sustained shedding of cognate micelles induces the hydrogel degradation, during which polymers are steadily incorporated in micelles without any micelle disassembly or reassembly. It is confirmed that using multiple-tags based imaging technology, such as FRET imaging, the fate of macro biodegradable materials in vitro and in vivo can be followed at a precise nano even molecular level. Such an unique hydrogel composed of nothing more than PECT micelles can act as not only an injectable nanomedicine reservoir by subcutaneous or peri-tissue administration, but also an advanced "combo" macroscale platform for co-delivery of multi-modal therapeutic agents. Our findings also indicate that biological stimuli (e.g., temperature, enzymes)-induced non-covalent micelle self-assembly may provide us an effective strategy to prepare a macroscale device from nanoscale subunits.
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Affiliation(s)
- Pingsheng Huang
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
| | - Huijuan Song
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
| | - Yumin Zhang
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
| | - Jinjian Liu
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
| | - Zhen Cheng
- Molecular Imaging Program at Stanford and Bio-X Program, Canary Center at Stanford for Cancer Early Detection, Stanford University, Stanford, CA 94305-5484, USA
| | - Xing-Jie Liang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology of China, Beijing 100190, China
| | - Weiwei Wang
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China.
| | - Deling Kong
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
| | - Jianfeng Liu
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China.
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70
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Fan J, Li R, Wang H, He X, Nguyen TP, Letteri RA, Zou J, Wooley KL. Multi-responsive polypeptide hydrogels derived from N-carboxyanhydride terpolymerizations for delivery of nonsteroidal anti-inflammatory drugs. Org Biomol Chem 2017; 15:5145-5154. [PMID: 28574067 PMCID: PMC5551480 DOI: 10.1039/c7ob00931c] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A polypeptide-based hydrogel system, when prepared from a diblock polymer with a ternary copolypeptide as one block, exhibited thermo-, mechano- and enzyme-responsive properties, which enabled the encapsulation of naproxen (Npx) during the sol-gel transition and its release in the gel state. Statistical terpolymerizations of l-alanine (Ala), glycine (Gly) and l-isoleucine (Ile) NCAs at a 1 : 1 : 1 feed ratio initiated by monomethoxy monoamino-terminated poly(ethylene glycol) afforded a series of methoxy poly(ethylene glycol)-block-poly(l-alanine-co-glycine-co-l-isoleucine) (mPEG-b-P(A-G-I)) block polymers. β-Sheets were the dominant secondary structures within the polypeptide segments, which facilitated a heat-induced sol-to-gel transition, resulting from the supramolecular assembly of β-sheets into nanofibrils. Deconstruction of the three-dimensional networks by mechanical force (sonication) triggered the reverse gel-to-sol transition. Certain enzymes could accelerate the breakdown of the hydrogel, as determined by in vitro gel weight loss profiles. The hydrogels were able to encapsulate and release Npx over 6 days, demonstrating the potential application of these polypeptide hydrogels as an injectable local delivery system for small molecule drugs.
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Affiliation(s)
- Jingwei Fan
- Departments of Chemistry, Chemical Engineering, Materials Science and Engineering, and Laboratory for Synthetic-Biologic Interactions, Taxes A&M University, P.O. BOX 30012, 3255 TAMU, College Station, TX 77842, USA.
| | - Richen Li
- Departments of Chemistry, Chemical Engineering, Materials Science and Engineering, and Laboratory for Synthetic-Biologic Interactions, Taxes A&M University, P.O. BOX 30012, 3255 TAMU, College Station, TX 77842, USA.
| | - Hai Wang
- Departments of Chemistry, Chemical Engineering, Materials Science and Engineering, and Laboratory for Synthetic-Biologic Interactions, Taxes A&M University, P.O. BOX 30012, 3255 TAMU, College Station, TX 77842, USA.
| | - Xun He
- Departments of Chemistry, Chemical Engineering, Materials Science and Engineering, and Laboratory for Synthetic-Biologic Interactions, Taxes A&M University, P.O. BOX 30012, 3255 TAMU, College Station, TX 77842, USA.
| | - Tan P Nguyen
- Departments of Chemistry, Chemical Engineering, Materials Science and Engineering, and Laboratory for Synthetic-Biologic Interactions, Taxes A&M University, P.O. BOX 30012, 3255 TAMU, College Station, TX 77842, USA.
| | - Rachel A Letteri
- Departments of Chemistry, Chemical Engineering, Materials Science and Engineering, and Laboratory for Synthetic-Biologic Interactions, Taxes A&M University, P.O. BOX 30012, 3255 TAMU, College Station, TX 77842, USA.
| | - Jiong Zou
- Departments of Chemistry, Chemical Engineering, Materials Science and Engineering, and Laboratory for Synthetic-Biologic Interactions, Taxes A&M University, P.O. BOX 30012, 3255 TAMU, College Station, TX 77842, USA.
| | - Karen L Wooley
- Departments of Chemistry, Chemical Engineering, Materials Science and Engineering, and Laboratory for Synthetic-Biologic Interactions, Taxes A&M University, P.O. BOX 30012, 3255 TAMU, College Station, TX 77842, USA.
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71
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Kim HA, Lee HJ, Hong JH, Moon HJ, Ko DY, Jeong B. α,ω-Diphenylalanine-End-Capping of PEG-PPG-PEG Polymers Changes the Micelle Morphology and Enhances Stability of the Thermogel. Biomacromolecules 2017; 18:2214-2219. [PMID: 28605182 DOI: 10.1021/acs.biomac.7b00626] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Pluronics F127 (P, PEG-PPG-PEG triblock copolymer) was coupled with diphenylalanine (FF) to prepare FF-end-capped Pluronics (FFPFF). With increasing temperature from 10 to 60 °C, the FFPFF self-assembled to vesicles in water. The unimer-to-vesicle transition accompanies endothermic enthalpy of 53.9 kcal/mol. Aqueous P and FFPFF solutions exhibited thermogelation in 15.0-24.0 wt %. The gel phase of FFPFF was stable up to 90 °C, whereas that of P turned into a sol again at 55-86 °C, indicating that end-capping with FF improved the gel stability against heat. In addition, the carboxylic acids of the FF end-groups can form coordination bonds with metal ions, and the gel modulus at 37 °C increased from 15-21 KPa (P) to 20-25 KPa (FFPFF) to 24-28 KPa (FFPFF-Zn), and the duration of gel against water-erosion increased from 24 h (P) to 60 h (FFPFF-Zn), leading to a useful biomaterial for sustained drug delivery. The FFPFF-Zn gels implanted in the rats' subcutaneous layer induced a mild inflammatory responses. Contrary to the previous end-capping of Pluronics by poly(lactic acid), polycarprolactone, carboxylic acid, and so on that weakened the gel stability, the diphenylalanine end-capping strengthened the stability of Pluronics gel against heat and water-erosion. This paper suggests that the control of polymer nanoassemblies directed by FF end-groups improves the mechanical properties and stability of the resulting thermogel and, thus, provides a useful drug delivery carrier with prolonged durability.
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Affiliation(s)
- Hae An Kim
- Department of Chemistry and Nanoscience, Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Hyun Jung Lee
- Department of Chemistry and Nanoscience, Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Ja Hye Hong
- Department of Chemistry and Nanoscience, Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Hyo Jung Moon
- Department of Chemistry and Nanoscience, Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Du Young Ko
- Department of Chemistry and Nanoscience, Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Byeongmoon Jeong
- Department of Chemistry and Nanoscience, Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
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72
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Aso A, Taki K, Maeda T, Toma K, Tamiaki H, Hotta A. Composition‐dependent sol‐gel transition of amphiphilic blend of PEG with hydrophobic gallamide components. J Appl Polym Sci 2017. [DOI: 10.1002/app.45402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Akihiro Aso
- Department of Mechanical EngineeringKeio University3‐14‐1, Hiyoshi, Kohoku‐ku, Yokohama223‐8522 Japan
| | - Kazutaka Taki
- Graduate School of Life SciencesRitsumeikan UniversityNoji‐higashi 1‐1‐1, Kusatsu Shiga525‐8577 Japan
| | - Tomoki Maeda
- Department of Mechanical EngineeringKeio University3‐14‐1, Hiyoshi, Kohoku‐ku, Yokohama223‐8522 Japan
| | - Kazunori Toma
- Asahi Kasei Corporation2‐1, Samejima, Fuji Shizuoka416‐8501 Japan
| | - Hitoshi Tamiaki
- Graduate School of Life SciencesRitsumeikan UniversityNoji‐higashi 1‐1‐1, Kusatsu Shiga525‐8577 Japan
| | - Atsushi Hotta
- Department of Mechanical EngineeringKeio University3‐14‐1, Hiyoshi, Kohoku‐ku, Yokohama223‐8522 Japan
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73
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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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74
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Nielsen JE, Zhu K, Sande SA, Kováčik L, Cmarko D, Knudsen KD, Nyström B. Structural and Rheological Properties of Temperature-Responsive Amphiphilic Triblock Copolymers in Aqueous Media. J Phys Chem B 2017; 121:4885-4899. [PMID: 28430448 DOI: 10.1021/acs.jpcb.7b01174] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Thermoresponsive amphiphilic biodegradable block copolymers of the type poly(ε-caprolactone-co-lactide)-poly(ethylene glycol)-poly(ε-caprolactone-co-lactide) (PCLA-PEGm-PCLA) have great potential for various biomedical applications. In the present study, we have surveyed the effects of PEG spacer length (m = 1000 and 1500), temperature, and polymer concentration on the self-assembling process to form supramolecular structures in aqueous solutions of the PCLA-PEGm-PCLA copolymer. This copolymer has a lower critical solution temperature, and the cloud point depends on both concentration and PEG length. Thermoreversible hydrogels are formed in the semidilute regime; the gel windows in the phase diagrams can be tuned by the concentration and length of the PEG spacer. The rheological properties of both dilute and semidilute samples were characterized; especially the sol-to-gel transition was examined. Small-angle neutron scattering (SANS) experiments reveal fundamental structural differences between the two copolymers for both dilute and semidilute samples. The intensity profiles for the copolymer with the long PEG spacer could be described by a spherical core-shell model over a broad temperature domain, whereas the copolymer with the short hydrophilic spacer forms rod-like species over an extended temperature range. This finding is supported by cryo-TEM images. At temperatures approaching macroscopic phase separation, both copolymers seem to assume extended rod-like structures.
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Affiliation(s)
- Josefine Eilsø Nielsen
- School of Pharmacy, Department of Pharmaceutics, University of Oslo , P.O. Box 1068, Blindern, N-0316 Oslo, Norway.,Department of Chemistry, University of Oslo , P.O. Box 1033, Blindern, N-0315 Oslo, Norway
| | - Kaizheng Zhu
- Department of Chemistry, University of Oslo , P.O. Box 1033, Blindern, N-0315 Oslo, Norway
| | - Sverre Arne Sande
- School of Pharmacy, Department of Pharmaceutics, University of Oslo , P.O. Box 1068, Blindern, N-0316 Oslo, Norway
| | - Lubomír Kováčik
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague , Albertov 4, Prague, 128 01, Czech Republic
| | - Dušan Cmarko
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague , Albertov 4, Prague, 128 01, Czech Republic
| | - Kenneth D Knudsen
- Department of Physics, Institute for Energy Technology , P.O. Box 40, N-2027 Kjeller, Norway
| | - Bo Nyström
- Department of Chemistry, University of Oslo , P.O. Box 1033, Blindern, N-0315 Oslo, Norway
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75
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Efficacy of Poly(D,L-Lactic Acid-co-Glycolic acid)-Poly(Ethylene Glycol)-Poly(D,L-Lactic Acid-co-Glycolic Acid) Thermogel As a Barrier to Prevent Spinal Epidural Fibrosis in a Postlaminectomy Rat Model. Clin Spine Surg 2017; 30:E283-E290. [PMID: 28323713 DOI: 10.1097/bsd.0000000000000221] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
STUDY DESIGN Experimental animal study. OBJECTIVE The authors conducted a study to determine the efficacy and safety of the poly(D,L-lactic acid-co-glycolic acid)-poly(ethylene glycol)-poly(D,L-lactic acid-co-glycolic acid) (PLGA-PEG-PLGA) thermogel to prevent peridural fibrosis in an adult rat laminectomy model. SUMMARY OF BACKGROUND DATA Peridural fibrosis often occurs after spinal laminectomy. It might cause persistent back and/or leg pain postoperatively and make a reoperation more difficult and dangerous. Various materials have been used to prevent epidural fibrosis, but only limited success has been achieved. MATERIALS AND METHODS The PLGA-PEG-PLGA thermogel was synthesized by us. Total L3 laminectomies were performed on 24 rats. The PLGA-PEG-PLGA thermogel or chitosan (CHS) gel (a positive control group) was applied to the operative sites in a blinded manner. In the control group, the L3 laminectomy was performed and the defect was irrigated with the NS solution 3 times. All the rats were killed 4 weeks after the surgery. RESULTS The cytotoxicity of this thermogel was evaluated in vitro and the result demonstrated that no evidence of cytotoxicity was observed. The extent of epidural fibrosis, the area of epidural fibrosis, and the density of the fibroblasts and blood vessel were evaluated histologically. There were statistical differences among the PLGA-PEG-PLGA thermogel or CHS gel group compared with the control group. Although there was no difference between the PLGA-PEG-PLGA thermogel and CHS gel, the efficiency of the PLGA-PEG-PLGA thermogel was shown to be slightly improved compared with the CHS gel. CONCLUSIONS The biocompatibility of the PLGA-PEG-PLGA thermogel was proven well. The application of this thermogel effectively reduced epidural scarring and prevented the subsequent adhesion to the dura mater. No side effects were noted in the rats.
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76
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Wang P, Chu W, Zhuo X, Zhang Y, Gou J, Ren T, He H, Yin T, Tang X. Modified PLGA–PEG–PLGA thermosensitive hydrogels with suitable thermosensitivity and properties for use in a drug delivery system. J Mater Chem B 2017; 5:1551-1565. [DOI: 10.1039/c6tb02158a] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
PLGA–PEG–PLGA (PPP) triblock copolymer is the most widely studied thermosensitive hydrogel owing to its non-toxic, biocompatible, biodegradable, and thermosensitive properties.
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Affiliation(s)
- Puxiu Wang
- Department of Pharmaceutics
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Wei Chu
- Department of Pharmaceutics
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Xuezhi Zhuo
- Department of Pharmaceutics
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Yu Zhang
- Department of Pharmaceutics
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Jingxin Gou
- Department of Pharmaceutics
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Tianyang Ren
- Department of Pharmaceutics
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Haibing He
- Department of Pharmaceutics
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Tian Yin
- School of Functional Food and Wine
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Xing Tang
- Department of Pharmaceutics
- Shenyang Pharmaceutical University
- Shenyang
- China
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77
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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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78
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Li P, Zhang J, Dong CM. Photosensitive poly(o-nitrobenzyloxycarbonyl-l-lysine)-b-PEO polypeptide copolymers: synthesis, multiple self-assembly behaviors, and the photo/pH-thermo-sensitive hydrogels. Polym Chem 2017. [DOI: 10.1039/c7py01574g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We synthesize a photosensitive poly(o-nitrobenzyloxycarbonyl-l-lysine)-b-poly(ethylene glycol) block copolymer and fabricate three kinds of dual-sensitive (i.e., photo/pH-thermo) polypeptide normal and reverse micellar hydrogels.
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Affiliation(s)
- Pan Li
- School of Chemistry and Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Jiacheng Zhang
- School of Chemistry and Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Chang-Ming Dong
- School of Chemistry and Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
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79
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Ma Q, Lei K, Ding J, Yu L, Ding J. Design, synthesis and ring-opening polymerization of a new iodinated carbonate monomer: a universal route towards ultrahigh radiopaque aliphatic polycarbonates. Polym Chem 2017. [DOI: 10.1039/c7py01411b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A universal route towards ultrahigh radiopaque aliphatic polycarbonates was developed based on a new iodinated carbonate monomer.
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Affiliation(s)
- Qian Ma
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Kewen Lei
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Jian Ding
- 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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80
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Ci T, Shen Y, Cui S, Liu R, Yu L, Ding J. Achieving High Drug Loading and Sustained Release of Hydrophobic Drugs in Hydrogels through In Situ Crystallization. Macromol Biosci 2016; 17. [DOI: 10.1002/mabi.201600299] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 08/24/2016] [Indexed: 12/31/2022]
Affiliation(s)
- Tianyuan Ci
- State Key Laboratory of Molecular Engineering of Polymers; Department of Macromolecular Science; Fudan University; 220 Handan Road Shanghai 200433 China
| | - Yuning Shen
- State Key Laboratory of Molecular Engineering of Polymers; Department of Macromolecular Science; Fudan University; 220 Handan Road Shanghai 200433 China
| | - Shuquan Cui
- State Key Laboratory of Molecular Engineering of Polymers; Department of Macromolecular Science; Fudan University; 220 Handan Road Shanghai 200433 China
| | - Ruili Liu
- State Key Laboratory of Molecular Engineering of Polymers; Department of Macromolecular Science; Fudan University; 220 Handan Road Shanghai 200433 China
| | - Lin Yu
- State Key Laboratory of Molecular Engineering of Polymers; Department of Macromolecular Science; Fudan University; 220 Handan Road Shanghai 200433 China
| | - Jiandong Ding
- State Key Laboratory of Molecular Engineering of Polymers; Department of Macromolecular Science; Fudan University; 220 Handan Road Shanghai 200433 China
- Key Laboratory of Smart Drug Delivery of Ministry of Education; School of Pharmacy; Fudan University; 826 Zhangheng Road Shanghai 201203 China
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81
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Yang R, Sabharwal V, Okonkwo OS, Shlykova N, Tong R, Lin LY, Wang W, Guo S, Rosowski JJ, Pelton SI, Kohane DS. Treatment of otitis media by transtympanic delivery of antibiotics. Sci Transl Med 2016; 8:356ra120. [PMID: 27629487 PMCID: PMC5615819 DOI: 10.1126/scitranslmed.aaf4363] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 07/28/2016] [Indexed: 01/08/2023]
Abstract
Otitis media is the most common reason U.S. children receive antibiotics. The requisite 7- to 10-day course of oral antibiotics can be challenging to deliver in children, entails potential systemic toxicity, and encourages selection of antimicrobial-resistant bacteria. We developed a drug delivery system that, when applied once to the tympanic membrane through the external auditory canal, delivers an entire course of antimicrobial therapy to the middle ear. A pentablock copolymer poloxamer 407-polybutylphosphoester (P407-PBP) was designed to flow easily during application and then to form a mechanically strong hydrogel on the tympanic membrane. U.S. Food and Drug Administration-approved chemical permeation enhancers within the hydrogel assisted flux of the antibiotic ciprofloxacin across the membrane. This drug delivery system completely eradicated otitis media from nontypable Haemophilus influenzae (NTHi) in 10 of 10 chinchillas, whereas only 62.5% of animals receiving 1% ciprofloxacin alone had cleared the infection by day 7. The hydrogel system was biocompatible in the ear, and ciprofloxacin was undetectable systemically (in blood), confirming local drug delivery and activity. This fast-gelling hydrogel could improve compliance, minimize side effects, and prevent systemic distribution of antibiotics in one of the most common pediatric illnesses, possibly minimizing the development of antibiotic resistance.
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Affiliation(s)
- Rong Yang
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Vishakha Sabharwal
- Division of Pediatric Infectious Diseases, Maxwell Finland Laboratory for Infectious Diseases, Boston Medical Center, Boston, MA 02118, USA
| | - Obiajulu S Okonkwo
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Nadya Shlykova
- Division of Pediatric Infectious Diseases, Maxwell Finland Laboratory for Infectious Diseases, Boston Medical Center, Boston, MA 02118, USA
| | - Rong Tong
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Lily Yun Lin
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Weiping Wang
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Shutao Guo
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - John J Rosowski
- Department of Otology and Laryngology, Eaton-Peabody Laboratories, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA
| | - Stephen I Pelton
- Division of Pediatric Infectious Diseases, Maxwell Finland Laboratory for Infectious Diseases, Boston Medical Center, Boston, MA 02118, USA
| | - Daniel S Kohane
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.
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82
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Chen Y, Li Y, Shen W, Li K, Yu L, Chen Q, Ding J. Controlled release of liraglutide using thermogelling polymers in treatment of diabetes. Sci Rep 2016; 6:31593. [PMID: 27531588 PMCID: PMC4987673 DOI: 10.1038/srep31593] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 07/25/2016] [Indexed: 12/27/2022] Open
Abstract
In treatment of diabetes, it is much desired in clinics and challenging in pharmaceutics and material science to set up a long-acting drug delivery system. This study was aimed at constructing a new delivery system using thermogelling PEG/polyester copolymers. Liraglutide, a fatty acid-modified antidiabetic polypeptide, was selected as the model drug. The thermogelling polymers were presented by poly(ε-caprolactone-co-glycolic acid)-poly(ethylene glycol)-poly(ε-caprolactone-co-glycolic acid) (PCGA-PEG-PCGA) and poly(lactic acid-co-glycolic acid)-poly(ethylene glycol)-poly(lactic acid-co-glycolic acid) (PLGA-PEG-PLGA). Both the copolymers were soluble in water, and their concentrated solutions underwent temperature-induced sol-gel transitions. The drug-loaded polymer solutions were injectable at room temperature and gelled in situ at body temperature. Particularly, the liraglutide-loaded PCGA-PEG-PCGA thermogel formulation exhibited a sustained drug release manner over one week in both in vitro and in vivo tests. This feature was attributed to the combined effects of an appropriate drug/polymer interaction and a high chain mobility of the carrier polymer, which facilitated the sustained diffusion of drug out of the thermogel. Finally, a single subcutaneous injection of this formulation showed a remarkably improved glucose tolerance of mice for one week. Hence, the present study not only developed a promising long-acting antidiabetic formulation, but also put forward a combined strategy for controlled delivery of polypeptide.
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Affiliation(s)
- Yipei Chen
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai, 200433, China
| | - Yuzhuo Li
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai, 200433, China
| | - Wenjia Shen
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai, 200433, China
| | - Kun Li
- National Pharmaceutical Engineering Research Center, China State Institute of Pharmaceutical Industry, Shanghai, 200437, China
| | - Lin Yu
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai, 200433, China
| | - Qinghua Chen
- National Pharmaceutical Engineering Research Center, China State Institute of Pharmaceutical Industry, Shanghai, 200437, China
| | - Jiandong Ding
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai, 200433, China
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83
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Popescu MT, Liontos G, Avgeropoulos A, Voulgari E, Avgoustakis K, Tsitsilianis C. Injectable Hydrogel: Amplifying the pH Sensitivity of a Triblock Copolypeptide by Conjugating the N-Termini via Dynamic Covalent Bonding. ACS APPLIED MATERIALS & INTERFACES 2016; 8:17539-17548. [PMID: 27341446 DOI: 10.1021/acsami.6b03977] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We explore the self-assembly behavior of aqueous solutions of an amphiphilic, pH-sensitive poly(l-alanine)-b-poly(l-glutamic acid)-b-poly(l-alanine), (A5E11A5) triblock copolypeptide, end-capped by benzaldehyde through Schiff base reaction. At elevated concentrations and under physiological pH (7.4) and ionic strength (0.15M), the bare copolypeptide aqueous solutions underwent a sol-gel transition after heating and slow cooling thermal treatment, forming opaque stiff gels due to a hierarchical self-assembly that led to the formation of β-sheet-based twisted super fibers (Popescu et al. Soft Matter 2015, 11, 331-342). The conjugation of the N-termini with benzaldehyde (Bz) through a Schiff base reaction amplifies the copolypeptide pH-sensitivity within a narrow pH window relevant for in vivo applications. Specifically, the dynamic character of the imine bond allowed coupling/decoupling of the Bz upon switching pH. The presence of Bz conjugates to the N-termini of the copolypeptide resulted in enhanced packing of the elementary superfibers into thick and short piles, which inhibited the ability of the system for gelation. However, partial cleavage of Bz upon lowering pH to 6.5 prompted recovery of the hydrogel. The sol-gel transition triggered by pH was reversible, due to the coupling/decoupling of the benzoic-imine dynamic covalent bonding, endowing thus the gelling system with injectability. Undesirably, the gelation temperature window was significantly reduced, which however can be regulated at physiological temperatures by using a suitable mixture of the bare and the Bz-conjugated coplypeptide. This triblock copolypeptide gelator was investigated as a scaffold for the encapsulation of polymersome nanocarriers, loaded with a hydrophilic model drug, calcein. The polymersome/polypeptide complex system showed prolonged probe release in pH 6.5, which is relevant to extracellular tumor environment, rendering the system potentially useful for sustained delivery of anticancer drugs locally in the tumor.
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Affiliation(s)
| | - George Liontos
- Department of Materials Science and Engineering, University of Ioannina , University Campus, 45110 Ioannina, Greece
| | - Apostolos Avgeropoulos
- Department of Materials Science and Engineering, University of Ioannina , University Campus, 45110 Ioannina, Greece
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84
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Gao L, Sun Q, Wang Y, Zhu W, Li X, Luo Q, Li X, Shen Z. Injectable poly(ethylene glycol) hydrogels for sustained doxorubicin release. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3852] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Lilong Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
| | - Qiang Sun
- Affiliated Stomatology Hospital, School of Medicine; Zhejiang University; Hangzhou 310006 China
| | - Ying Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
- Affiliated Stomatology Hospital, School of Medicine; Zhejiang University; Hangzhou 310006 China
| | - Weipu Zhu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
- Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province; Hangzhou 310027 China
| | - Xiaojun Li
- Affiliated Stomatology Hospital, School of Medicine; Zhejiang University; Hangzhou 310006 China
| | - Qiaojie Luo
- The First Affiliated Hospital, College of Medicine; Zhejiang University; Hangzhou 310003 China
| | - Xiaodong Li
- Affiliated Stomatology Hospital, School of Medicine; Zhejiang University; Hangzhou 310006 China
| | - Zhiquan Shen
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
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85
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Wang Z, Nie J, Qin W, Hu Q, Tang BZ. Gelation process visualized by aggregation-induced emission fluorogens. Nat Commun 2016; 7:12033. [PMID: 27337500 PMCID: PMC4931011 DOI: 10.1038/ncomms12033] [Citation(s) in RCA: 155] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 05/24/2016] [Indexed: 12/22/2022] Open
Abstract
Alkaline-urea aqueous solvent system provides a novel and important approach for the utilization of polysaccharide. As one of the most important polysaccharide, chitosan can be well dissolved in this solvent system, and the resultant hydrogel material possesses unique and excellent properties. Thus the sound understanding of the gelation process is fundamentally important. However, current study of the gelation process is still limited due to the absence of direct observation and the lack of attention on the entire process. Here we show the entire gelation process of chitosan LiOH-urea aqueous system by aggregation-induced emission fluorescent imaging. Accompanied by other pseudo in situ investigations, we propose the mechanism of gelation process, focusing on the formation of junction points including hydrogen bonds and crystalline.
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Affiliation(s)
- Zhengke Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Key Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang Province, Hangzhou 310027, China
| | - Jingyi Nie
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Key Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang Province, Hangzhou 310027, China
| | - Wei Qin
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong 999077, China
| | - Qiaoling Hu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Key Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang Province, Hangzhou 310027, China
| | - Ben Zhong Tang
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong 999077, China
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86
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Mao H, Shan G, Bao Y, Wu ZL, Pan P. Thermoresponsive physical hydrogels of poly(lactic acid)/poly(ethylene glycol) stereoblock copolymers tuned by stereostructure and hydrophobic block sequence. SOFT MATTER 2016; 12:4628-4637. [PMID: 27121732 DOI: 10.1039/c6sm00517a] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
CBABC-type poly(lactic acid) (PLA)/poly(ethylene glycol) (PEG) pentablock copolymers composed of a central PEG block (A) and enantiomeric poly(l-lactic acid) (PLLA, B), poly(d-lactic acid) (PDLA, C) blocks were synthesized. Such pentablock copolymers form physical hydrogels at high concentrations in an aqueous solution, which stem from the aggregation and physical bridging of copolymer micelles. These gels are thermoresponsive and turn into sols upon heating. Physical gelation, gel-to-sol transition, crystalline state, microstructure, rheological behavior, biodegradation, and drug release behavior of PLA/PEG pentablock copolymers and their gels were investigated; they were also compared with PLA-PEG-PLA triblock copolymers containing the isotactic PLLA or atactic poly(d,l-lactide) (PDLLA) endblocks and PLLA-PEG-PLLA/PDLA-PEG-PDLA enantiomeric mixtures. PLA hydrophobic domains in pentablock copolymer gels changed from a homocrystalline to stereocomplexed structure as the PLLA/PDLA block length ratio approached 1/1. The gel of symmetric pentablock copolymer exhibited a wider gelation region, higher gel-to-sol transition temperature, higher hydrophobic domain crystallinity, larger intermicellar distance, higher storage modulus, and slower degradation and drug release rate compared to those of the asymmetric PLA/PEG pentablock copolymers or triblock copolymers. SAXS results indicated that the PLLA/PDLA blocks stereocomplexation in pentablock copolymers facilitated the intermicellar aggregation and bridging. Cylindrical ordered structures were observed in all the gels formed from the PLA/PEG pentablock and triblock copolymers. The stereocomplexation degree and intermicellar distance of the pentablock copolymer gels increased with heating.
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Affiliation(s)
- Hailiang Mao
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
| | - Guorong Shan
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
| | - Yongzhong Bao
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
| | - Zi Liang Wu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Pengju Pan
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
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87
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Dissipative self-assembly of vesicular nanoreactors. Nat Chem 2016; 8:725-31. [PMID: 27325101 DOI: 10.1038/nchem.2511] [Citation(s) in RCA: 307] [Impact Index Per Article: 38.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 03/16/2016] [Indexed: 12/11/2022]
Abstract
Dissipative self-assembly is exploited by nature to control important biological functions, such as cell division, motility and signal transduction. The ability to construct synthetic supramolecular assemblies that require the continuous consumption of energy to remain in the functional state is an essential premise for the design of synthetic systems with lifelike properties. Here, we show a new strategy for the dissipative self-assembly of functional supramolecular structures with high structural complexity. It relies on the transient stabilization of vesicles through noncovalent interactions between the surfactants and adenosine triphosphate (ATP), which acts as the chemical fuel. It is shown that the lifetime of the vesicles can be regulated by controlling the hydrolysis rate of ATP. The vesicles sustain a chemical reaction but only as long as chemical fuel is present to keep the system in the out-of-equilibrium state. The lifetime of the vesicles determines the amount of reaction product produced by the system.
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88
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Zhang Y, Wang M, Ye J, Lang M. Pendant groups fine-tuning thermal gelation of poly(ε
-caprolactone)-b
-poly(ethylene glycol)-b
-poly(ε-caprolactone) aqueous solution. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28134] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yan Zhang
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology; Shanghai 200237 China
| | - Miao Wang
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology; Shanghai 200237 China
| | - Jinhai Ye
- Institute of Stomatology, School of Stomatology, Nanjing Medical University; 136 Hanzhong Road Nanjing Jiangsu Province 210029 China
| | - Meidong Lang
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology; Shanghai 200237 China
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89
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Chung HJ, Ko DY, Moon HJ, Jeong B. EF-Hand Mimicking Calcium Binding Polymer. Biomacromolecules 2016; 17:1075-82. [DOI: 10.1021/acs.biomac.5b01694] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Hee Jung Chung
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea
| | - Du Young Ko
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea
| | - Hyo Jung Moon
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea
| | - Byeongmoon Jeong
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea
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90
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Moon HJ, Patel M, Chung H, Jeong B. Nanocomposite versus Mesocomposite for Osteogenic Differentiation of Tonsil-Derived Mesenchymal Stem Cells. Adv Healthc Mater 2016; 5:353-63. [PMID: 26634888 DOI: 10.1002/adhm.201500558] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 09/24/2015] [Indexed: 11/08/2022]
Abstract
Injectable inorganic/organic composite systems consisting of well-defined mesocrystals (4-8 μm) of calcium phosphate and polypeptide thermogel significantly enhance the osteogenic differentiation of the tonsil derived mesenchymal stem cells (TMSCs). Compared to composite systems incorporating nanoparticles (10-100 nm) or pure hydrogel systems, osteogenic biomarkers including alkaline phosphatase (ALP), bone morphogenetic protein 2, and osteocalcin are highly expressed at both the mRNA level and the protein level in the mesocrystal composite systems. ALP activity of differentiated cells is also significantly higher in the mesocomposite systems compared to the nanocomposite systems or the pure hydrogel systems. The mesocomposite systems provide not only hard surfaces for binding the cells/proteins by the inorganic mesocrystals but also a soft matrix for holding the cells by the hydrogel. Through the current research, (1) a novel method of preparing mesocrystals is developed, (2) TMSCs are proved as a new resource of stem cells, and (3) the mesocomposite systems are proved to be a promising tool in controlling stem cell differentiation. (4) Finally, the research emphasizes the significance of mesoscience as a new perspective of science in controlling cell and material interfaces.
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Affiliation(s)
- Hyo Jung Moon
- Department of Chemistry and Nanoscience; Ewha Womans University; 52 Ewhayeodae-gil Seodaemun-guSeoul 120-750 South Korea
| | - Madhumita Patel
- Department of Chemistry and Nanoscience; Ewha Womans University; 52 Ewhayeodae-gil Seodaemun-guSeoul 120-750 South Korea
| | - Heejung Chung
- Department of Chemistry and Nanoscience; Ewha Womans University; 52 Ewhayeodae-gil Seodaemun-guSeoul 120-750 South Korea
| | - Byeongmoon Jeong
- Department of Chemistry and Nanoscience; Ewha Womans University; 52 Ewhayeodae-gil Seodaemun-guSeoul 120-750 South Korea
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91
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Liow SS, Dou Q, Kai D, Karim AA, Zhang K, Xu F, Loh XJ. Thermogels: In Situ Gelling Biomaterial. ACS Biomater Sci Eng 2016; 2:295-316. [DOI: 10.1021/acsbiomaterials.5b00515] [Citation(s) in RCA: 144] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sing Shy Liow
- Institute of Materials Research and Engineering (IMRE), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634
| | - Qingqing Dou
- Institute of Materials Research and Engineering (IMRE), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634
| | - Dan Kai
- Institute of Materials Research and Engineering (IMRE), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634
| | - Anis Abdul Karim
- Institute of Materials Research and Engineering (IMRE), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634
| | - Kangyi Zhang
- Institute of Materials Research and Engineering (IMRE), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634
| | | | - Xian Jun Loh
- Institute of Materials Research and Engineering (IMRE), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634
- Department
of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore
- Singapore Eye Research Institute, 11 Third Hospital Avenue, Singapore 168751, Singapore
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92
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Yang R, Tan L, Cen L, Zhang Z. An injectable scaffold based on crosslinked hyaluronic acid gel for tissue regeneration. RSC Adv 2016. [DOI: 10.1039/c5ra27870h] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An injectable scaffold of crosslinked hyaluronic acid gel for tissue regeneration.
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Affiliation(s)
- Rui Yang
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering
- Department of Product Engineering
- School of Chemical Engineering
- East China University of Science and Technology
- Shanghai
| | - Linhua Tan
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering
- Department of Product Engineering
- School of Chemical Engineering
- East China University of Science and Technology
- Shanghai
| | - Lian Cen
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering
- Department of Product Engineering
- School of Chemical Engineering
- East China University of Science and Technology
- Shanghai
| | - Zhibing Zhang
- School of Chemical Engineering
- The University of Birmingham
- Birmingham
- UK
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93
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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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94
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An injectable hydrogel with or without drugs for prevention of epidural scar adhesion after laminectomy in rats. CHINESE JOURNAL OF POLYMER SCIENCE 2015. [DOI: 10.1007/s10118-016-1740-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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95
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Zhang Y, Zhong Y, Hu M, Xiang N, Fu Y, Gong T, Zhang Z. In vitro and in vivo sustained release of exenatide from vesicular phospholipid gels for type II diabetes. Drug Dev Ind Pharm 2015; 42:1042-9. [PMID: 26558908 DOI: 10.3109/03639045.2015.1107090] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Diabetes is a chronic disease that requires daily treatment to maintain a stable blood glucose level. Sustained-release formulations can thus benefit the treatment of diabetes by reducing the repeated administration of therapeutics. Our study aimed to develop a sustained-release platform for exenatide that is biocompatible and capable of mass production. Vesicular phospholipid gels (VPGs) are semisolid phospholipid dispersions with controlled release profiles. Exenatide-VPGs prepared via simple magnetic stirring showed excellent biocompatibility with an average particle size of about 15 μm after redispersion. VPGs were shown to achieve sustained release for up to 21 days in vitro with no obvious burst effect. The in vivo release study showed that VPGs sustained the release of the exenatide for up to 11 days. Moreover, after subcutaneous injection of the exenatide-VPGs in the diabetic rats, the hypoglycemic effect lasted for 10 days compared with exenatide solution. In sum, the exenatide-VPGs system represents a promising sustained-release formulation for exenatide with a long-acting therapeutic efficacy in vivo.
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Affiliation(s)
- Yu Zhang
- a Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, Sichuan University , Sichuan , People's Republic of China
| | - Ying Zhong
- a Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, Sichuan University , Sichuan , People's Republic of China
| | - Mei Hu
- a Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, Sichuan University , Sichuan , People's Republic of China
| | - Nanxi Xiang
- a Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, Sichuan University , Sichuan , People's Republic of China
| | - Yao Fu
- a Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, Sichuan University , Sichuan , People's Republic of China
| | - Tao Gong
- a Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, Sichuan University , Sichuan , People's Republic of China
| | - Zhirong Zhang
- a Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, Sichuan University , Sichuan , People's Republic of China
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96
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Ko DY, Patel M, Jung BK, Park JH, Jeong B. Phosphorylcholine-Based Zwitterionic Biocompatible Thermogel. Biomacromolecules 2015; 16:3853-62. [DOI: 10.1021/acs.biomac.5b01169] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Du Young Ko
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 120-750, Korea
| | - Madhumita Patel
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 120-750, Korea
| | - Bo Kyoeng Jung
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 120-750, Korea
| | - Jin Hye Park
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 120-750, Korea
| | - Byeongmoon Jeong
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 120-750, Korea
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97
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Zhang L, Shen W, Luan J, Yang D, Wei G, Yu L, Lu W, Ding J. Sustained intravitreal delivery of dexamethasone using an injectable and biodegradable thermogel. Acta Biomater 2015; 23:271-281. [PMID: 26004219 DOI: 10.1016/j.actbio.2015.05.005] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 03/26/2015] [Accepted: 05/09/2015] [Indexed: 12/13/2022]
Abstract
Delivery of therapeutic agents to posterior segment of the eyes is challenging due to the anatomy and physiology of ocular barriers and thus long-acting implantable formulations are much desired. In this study, a thermogelling system composed of two poly(lactic acid-co-glycolic acid)-poly(ethylene glycol)-poly(lactic acid-co-glycolic acid) (PLGA-PEG-PLGA) triblock copolymers was developed as an injectable matrix for intravitreal drug delivery. The thermogel was prepared by mixing a sol and a precipitate of PLGA-PEG-PLGA triblock copolymers with different block ratios, among which a hydrophobic glucocorticoid, dexamethasone (DEX), was incorporated. The DEX-loaded thermogel was a low-viscous liquid at low temperature and formed a non-flowing gel at body temperature. The in vitro release rate of DEX from the thermogel could be conveniently modulated by varying the mixing ratio of the two copolymers. The long-lasting intraocular residence of the thermogel was demonstrated by intravitreal injection of a fluorescence-labeled thermogel to rabbits. Compared with a DEX suspension, the intravitreal retention time of DEX increased from a dozen hours to over 1week when being loaded in the thermogel. Additionally, intravitreal administration of the thermogel did not impair the morphology of retina and cornea. This study reveals that the injectable PLGA-PEG-PLGA thermogel is a biocompatible carrier for sustained delivery of bioactive agents into the eyes, and provides an alternative approach for treatment of posterior segment diseases.
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Affiliation(s)
- Li Zhang
- Key Laboratory of Smart Drug Delivery, Ministry of Education, Department of Pharmaceutics, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Wenjia Shen
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Jiabin Luan
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Dongxiao Yang
- Key Laboratory of Smart Drug Delivery, Ministry of Education, Department of Pharmaceutics, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Gang Wei
- Key Laboratory of Smart Drug Delivery, Ministry of Education, Department of Pharmaceutics, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
| | - Lin Yu
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, 220 Handan Road, Shanghai 200433, China.
| | - Weiyue Lu
- Key Laboratory of Smart Drug Delivery, Ministry of Education, Department of Pharmaceutics, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Jiandong Ding
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, 220 Handan Road, Shanghai 200433, China
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98
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Kim DY, Kwon DY, Kwon JS, Kim JH, Min BH, Kim MS. Stimuli-Responsive InjectableIn situ-Forming Hydrogels for Regenerative Medicines. POLYM REV 2015. [DOI: 10.1080/15583724.2014.983244] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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99
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Jiménez ZA, Yoshida R. Temperature Driven Self-Assembly of a Zwitterionic Block Copolymer That Exhibits Triple Thermoresponsivity and pH Sensitivity. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00769] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Zulma A. Jiménez
- Department of Materials Engineering,
School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Ryo Yoshida
- Department of Materials Engineering,
School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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100
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Chen L, Ci T, Yu L, Ding J. Effects of Molecular Weight and Its Distribution of PEG Block on Micellization and Thermogellability of PLGA–PEG–PLGA Copolymer Aqueous Solutions. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00168] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Liang Chen
- State Key
Laboratory of Molecular Engineering of Polymers, Collaborative Innovation
Center of Polymers and Polymer Composite Materials, Department of
Macromolecular Science, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China
| | - Tianyuan Ci
- State Key
Laboratory of Molecular Engineering of Polymers, Collaborative Innovation
Center of Polymers and Polymer Composite Materials, Department of
Macromolecular Science, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China
| | - Lin Yu
- State Key
Laboratory of Molecular Engineering of Polymers, Collaborative Innovation
Center of Polymers and Polymer Composite Materials, Department of
Macromolecular Science, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China
| | - Jiandong Ding
- State Key
Laboratory of Molecular Engineering of Polymers, Collaborative Innovation
Center of Polymers and Polymer Composite Materials, Department of
Macromolecular Science, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China
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