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Super stretchability, strong adhesion, flexible sensor based on Fe3+ dynamic coordination sodium alginate/polyacrylamide dual-network hydrogel. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Sethi S, Bhatia S, Kamboj S, Singh RS, Rana V. Assessing the viability of carbamoylethyl pullulan-g-stearic acid based smart polymeric micelles for tumor targeting of raloxifene. Drug Dev Ind Pharm 2021; 47:1986-1997. [PMID: 35645171 DOI: 10.1080/03639045.2022.2083153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The present investigation entails the synthesis of smart pullulan polymeric micelles for evaluating its tumor targeting potential. For this purpose, two step polymerization synthesis reactions were conducted. In the first step, carbamoylethylation occurs by reaction of the free alcoholic moieties at 6th position of glucopyranose unit of pullulan with acrylamide in presence of alkali to obtain carbamoylethyl pullulan (CmP). In the second step, CmP undergoes graft polymerization with stearic acid (SA) to obtain CmP-g-stearic acid diblock co-polymer (CmP-g-SA) as evident from FTIR and NMR analysis. The XpRD spectra showed crystalline nature that was further confirmed by SEM indicating rough and poly-porous morphology. The QbD based optimized formulations of raloxifene HCl (RLX) loaded polymeric micelles (RLX PMs) exhibited pH-dependent release profile with added advantage of 1.2 times reduction in percentage hemolysis giving substantial compatibility with erythrocytes. In vivo pharmacokinetic performance of RLX PMs suggested enhanced mean residence time and volume of distribution. Besides, the biodistribution study of RLX PMs manifested enhanced entry of RLX in mammary carcinoma tissues as compared to normal tissues suggested that CmP-g-SA based micelles enhanced the anti-tumor activity of RLX. Overall, the findings pointed toward the biocompatibility of CmP-g-SA as a potential carrier system for the delivery of RLX.
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Affiliation(s)
- Sheshank Sethi
- Pharmaceutics Division, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, India
| | - Sachin Bhatia
- Pharmaceutics Division, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, India
| | | | - Ram Sarup Singh
- Department of Biotechnology, Carbohydrate and Protein Biotechnology Laboratory, Punjabi University, Patiala, India
| | - Vikas Rana
- Pharmaceutics Division, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, India
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3
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Xie J, Shen K, Zheng H, Yao Y, Chen Y, Gao C. Grafting of CAG peptides and (polyethylene glycol) on unsaturated polyurethane films to promote selective adhesion and migration of urethral epithelial cells. J Mater Chem B 2021; 9:6201-6211. [PMID: 34312649 DOI: 10.1039/d1tb00547b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Selective adhesion and migration of urethral epithelial cells (HUCs) over fibroblasts (FIBs) are very important in the reconstruction of the urethral epithelial layer and prevention of ureteral scarring and stenosis. In this study, unsaturated polyurethane (PPFU-CO-SS) films were co-grafted with a cell-resisting poly(ethylene glycol) (PEG) layer and HUC-selective Cys-Ala-Gly (CAG) peptides, whose physicochemical changes were confirmed by X-ray photon spectroscopy, fluorescence spectroscopy and water contact angle measurements. The adhesion and activation of platelets on the PEG/CAG grafted surface were significantly reduced compared to those on the PPFU-CO-SS, resulting in a similar status as that on a PEG-grafted surface. The HUC-selective material could obviously promote the adhesion and migration of HUCs. The ratio of the urethral epithelial cells to fibroblasts on the PEG/CAG grafted surface was nearly 3-fold that on the unmodified PPFU-CO-SS in a co-culture competitive environment. The urethral epithelial cells cultured on the PEG/CAG grafted surface also had the highest migration rate, which was 2.24-fold compared to that on the PPFU-CO-SS control.
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Affiliation(s)
- Jieqi Xie
- Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou 310027, China.
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4
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Mishra AK, Lim J, Lee J, Park S, Seo Y, Hwang H, Kim JK. Control drug release behavior by highly stable and pH sensitive poly(N-vinylpyrrolidone)-block-poly(4-vinylpyridine) copolymer micelles. POLYMER 2021. [DOI: 10.1016/j.polymer.2020.123329] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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5
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Synthesis and characterization of novel high transparency polymer films bearing adamantanol groups. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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6
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Kim S, Traore YL, Chen Y, Ho EA, Liu S. Switchable On-Demand Release of a Nanocarrier from a Segmented Reservoir Type Intravaginal Ring Filled with a pH-Responsive Supramolecular Polyurethane Hydrogel. ACS APPLIED BIO MATERIALS 2018; 1:652-662. [DOI: 10.1021/acsabm.8b00146] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Seungil Kim
- Biomedical Engineering, Faculty of Engineering, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Yannick Leandre Traore
- Laboratory for Drug Delivery and Biomaterials, School of Pharmacy, University of Waterloo, Kitchener, Ontario N2G 1C5, Canada
| | - Yufei Chen
- Laboratory for Drug Delivery and Biomaterials, School of Pharmacy, University of Waterloo, Kitchener, Ontario N2G 1C5, Canada
| | - Emmanuel A. Ho
- Laboratory for Drug Delivery and Biomaterials, School of Pharmacy, University of Waterloo, Kitchener, Ontario N2G 1C5, Canada
| | - Song Liu
- Biomedical Engineering, Faculty of Engineering, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
- Department of Biosystems Engineering, Faculty of Agricultural and Food Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
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Jommanee N, Chanthad C, Manokruang K. Preparation of injectable hydrogels from temperature and pH responsive grafted chitosan with tuned gelation temperature suitable for tumor acidic environment. Carbohydr Polym 2018; 198:486-494. [PMID: 30093026 DOI: 10.1016/j.carbpol.2018.06.099] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 06/21/2018] [Accepted: 06/22/2018] [Indexed: 11/15/2022]
Abstract
In this present work, stimuli responsive polymers that can respond to the temperature and pH of the environment were prepared. A series of temperature responsive diblock copolymers based on poly(ethylene glycol) methyl ether (mPEG) and ε-caprolactone (CL) were synthesized. Subsequently, the diblock copolymers were grafted onto chitosan, a pH responsive biopolymer. These chitosan-graft-(mPEG-block-PCL) (chitosan-g-(mPEG-b-PCL)) graft copolymers were structurally characterized by 1H NMR and FTIR and their sol-gel phase transitions were analyzed by the test tube inversion method as well as dynamic rheological measurements. These chitosan-g-(mPEG-b-PCL) graft copolymers demonstrated tunable temperature and pH responsive sol-gel phase transitions that correspond well with body temperature and pH of acidic tumor microenvironments. Gelation temperature (Tgel) decreased with increasing pH of the system, increasing PCL composition in the diblock copolymers, increasing solution concentration and decreasing grafting content of the diblock copolymers on chitosan. The graft copolymer hydrogels successfully showed the sustained release of both doxorubicin and curcumin for up to 2 weeks. The designed system was based on chitosan-g-(mPEG-b-PCL) graft copolymers, of which chitosan showed pH responsive properties and mPEG-b-PCL acted as a temperature sensitive moiety. In addition, mPEG and PCL are recognized as biocompatible polymers and chitosan has been engaged in various pharmaceutical research. Thus, this system could be considered an alternative choice for drug delivery applications.
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Affiliation(s)
- Natnicha Jommanee
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Chalathorn Chanthad
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
| | - Kiattikhun Manokruang
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
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Abstract
This article reviews stimuli-responsive and biostable polyurethanes (PUs) and discusses biomedical applications of smart PUs with a particular focus on long-term implantable PU biomaterials such as PU generated artificial blood vessels, artificial intervertebral discs (IVDs), and intravaginal rings (IVRs). Recently, smart PUs have been actively researched to enhance bioactivity, biocompatibility, and reduce drug side effects. Although biodegradability is important in regenerative medicine, biostability of PU plays a key role for long-term implantable biomaterials. This article reviews recent publications of research and inventions of stimuli-responsive and biostable PUs. Applications of smart PUs in long-term implantable biomaterials are discussed and linked to the future outlook of smart biostable PU biomaterials.
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Affiliation(s)
- Seungil Kim
- Biomedical Engineering, Faculty of Engineering, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Song Liu
- Biomedical Engineering, Faculty of Engineering, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada.,Department of Biosystems Engineering, Faculty of Agricultural and Food Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada.,Department of Medical Microbiology, Rady Faculty of Health Science, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
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9
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Xia LY, Zhang X, Cao M, Chen Z, Wu FG. Enhanced Fluorescence Emission and Singlet Oxygen Generation of Photosensitizers Embedded in Injectable Hydrogels for Imaging-Guided Photodynamic Cancer Therapy. Biomacromolecules 2017; 18:3073-3081. [PMID: 28820580 DOI: 10.1021/acs.biomac.7b00725] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Benefiting from their inherent localized and controlled release properties, hydrogels are ideal delivery systems for therapeutic drugs or nanoparticles. In particular, applications of hydrogels for the delivery and release of photoresponsive drugs or nanoparticles are receiving increasing attention. However, the effect of the hydrogel matrix on the fluorescence emission and singlet oxygen generation efficiency of the embedded photosensitizers (PSs) has not been clarified. Herein, meso-tetrakis(1-methylpyridinium-4-yl)porphyrin (TMPyP) as a water-soluble PS was encapsulated into an injectable hydrogel formed by glycol chitosan and dibenzaldehyde-terminated telechelic poly(ethylene glycol). Compared to free TMPyP solution, the TMPyP encapsulated in the hydrogel exhibits three distinct advantages: (1) more singlet oxygen was generated under the same laser irradiation condition; (2) much longer tumor retention was observed due to the low fluidity of the hydrogel; and (3) the fluorescence intensity of TMPyP was significantly enhanced in the hydrogel due to its decreased self-quenching effect. These excellent characteristics lead to remarkable anticancer efficacy and superior fluorescence emission property of the TMPyP-hydrogel system, promoting the development of imaging-guided photodynamic therapy.
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Affiliation(s)
- Liu-Yuan Xia
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University , 2 Sipailou Road, Nanjing 210096, P. R. China
| | - Xiaodong Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University , 2 Sipailou Road, Nanjing 210096, P. R. China
| | - Meng Cao
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University , 2 Sipailou Road, Nanjing 210096, P. R. China
| | - Zhan Chen
- Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Fu-Gen Wu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University , 2 Sipailou Road, Nanjing 210096, P. R. China
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Wang W, Zhou Z, Pan Y, Liu W, Zhou H, Liu Q, Yan H, Zhang Q. Preparation and Properties of 2, 4-2-Isocyanic Acid Methyl Ester/Poly(ϵ-caprolactone)/Diethylene Glycol Hydrogels. J MACROMOL SCI B 2017. [DOI: 10.1080/00222348.2017.1293364] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Wei Wang
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, P. R. China
| | - Zhihua Zhou
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, P. R. China
- Key Laboratory of Theoretical Organic Chemistry and Functional molecular, Hunan University of Science and Technology, Xiangtan, P. R. China
- Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, Hunan University of Science and Technology, Xiangtan, P. R. China
- Hunan Province College Key Laboratory of QSAR/QSPR, Hunan University of Science and Technology, Xiangtan, P. R. China
| | - Yifeng Pan
- Xiangya Hospital of Central South University, Changsha, P. R. China
| | - Wenjuan Liu
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, P. R. China
| | - Hu Zhou
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, P. R. China
| | - Qingquan Liu
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, P. R. China
| | - Hua Yan
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, P. R. China
| | - Qiao Zhang
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, P. R. China
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Kim S, Chen Y, Ho EA, Liu S. Reversibly pH-responsive polyurethane membranes for on-demand intravaginal drug delivery. Acta Biomater 2017; 47:100-112. [PMID: 27717914 DOI: 10.1016/j.actbio.2016.10.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 09/23/2016] [Accepted: 10/04/2016] [Indexed: 10/20/2022]
Abstract
To provide better protection for women against sexually transmitted infections, on-demand intravaginal drug delivery was attempted by synthesizing reversibly pH-sensitive polyether-polyurethane copolymers using poly(ethylene glycol) (PEG) and 1,4-bis(2-hydroxyethyl)piperazine (HEP). Chemical structure and thermo-characteristics of the synthesized polyurethanes were confirmed by attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), 1H-nuclear magnetic resonance (1H-NMR), and melting point testing. Membranes were cast by solvent evaporation method using the prepared pH-sensitive polyurethanes. The impact of varying pH on membrane swelling and surface morphology was evaluated via swelling ratio change and scanning electron microscopy (SEM). The prepared pH-responsive membranes showed two times higher swelling ratio at pH 4 than pH 7 and pH-triggered switchable surface morphology change. The anionic anti-inflammatory drug diclofenac sodium (NaDF) was used as a model compound for release studies. The prepared pH-responsive polyurethane membranes allowed continuous NaDF release for 24h and around 20% release of total NaDF within 3h at pH 7 but little-to-no drug release at pH 4.5. NaDF permeation across the prepared membranes demonstrated a reversible pH-responsiveness. The pH-responsive polyurethane membranes did not show any noticeable negative impact on vaginal epithelial cell viability or induction of pro-inflammatory cytokine production compared to controls. Overall, the non-cytotoxic HEP-based pH-responsive polyurethane demonstrated its potential to be used in membrane-based implants such as intravaginal rings to achieve on-demand "on-and-off" intravaginal drug delivery. STATEMENT OF SIGNIFICANCE A reversible and sharp switch between "off" and "on" drug release is achieved for the first time through new pH-sensitive polyurethane membranes, which can serve as window membranes in reservoir-type intravaginal rings for on-demand drug delivery to prevent sexually transmitted infections (STIs). Close to zero drug release occurs at the normal vaginal pH (4.5) for minimal side effects. Drug release is only triggered by elevation of pH to 7 during heterosexual intercourse. The reversibly sharp and fast "on-and-off" switch arises from the creative incorporation of a pH-sensitive monomer in the soft segment of polyurethane. This polyurethane biomaterial holds great potential to better protect women who are generally at higher risk and are more vulnerable to STIs.
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12
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Abou El Fadl FI. Synthesis and characterization of chitosan–poly(acrylamide–co-acrylic acid) magnetic nanocomposite hydrogels for use in catalysis. RUSS J APPL CHEM+ 2016. [DOI: 10.1134/s1070427216100177] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Sulfamethazine-based pH-sensitive hydrogels with potential application for transcatheter arterial chemoembolization therapy. Acta Biomater 2016; 41:253-63. [PMID: 27184404 DOI: 10.1016/j.actbio.2016.05.018] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 05/10/2016] [Accepted: 05/11/2016] [Indexed: 02/07/2023]
Abstract
UNLABELLED Transcatheter arterial chemoembolization (TACE) is the most common palliative therapy for unresectable hepatocellular carcinoma (HCC). The conventional TACE technique, which employs the Lipiodol® emulsion, has been widely used for human cancer treatments. However, this delivery system seems to be inconsistent and unstable in maintaining a high concentration of drugs at tumor sites. An alternative approach for TACE is loading drugs into a liquid embolic solution that exists as an injectable solution and can exhibit a sol-to-gel phase transition to form a solidified state once delivered to the tumor site. Here, we develop a novel sulfamethazine-based anionic pH-sensitive block copolymer with potential application as a radiopaque embolic material. The copolymer, named PCL-PEG-SM, and comprised of poly(ε-caprolactone), sulfamethazine, and poly(ethylene glycol), was fabricated by free radical polymerization. An aqueous solution of the developed copolymer underwent a sol-to-gel phase transition upon lowering the environmental pH to create a gel region that covered the physiological condition (pH 7.4, 37°C) and the low pH conditions at tumor sites (pH 6.5-7.0, 37°C). The release of doxorubicin (DOX) from DOX-loaded copolymer hydrogels could be sustained for more than 4weeks in vitro, and the released DOX retained its fully bioactivity via inhibition the proliferation of hepatic cancer cells. The radiopaque embolic formulations that were prepared by mixing copolymer solutions at pH 8.0 with Lipiodol®, a long-lasting X-ray contrast agent, could exhibit the gelation inside the tumor after intratumoral injection or intraarterial administration using a VX2 carcinoma hepatic tumor rabbit model. These results suggest that a novel anionic pH-sensitive copolymer has been developed with a potential application as a liquid radiopaque embolic solution for TACE of HCC. STATE OF SIGNIFICANCE Transcatheter arterial chemoembolization (TACE) has been widely used as a palliative treatment therapy for unresectable hepatocellular carcinoma (HCC). Conventional TACE technique, which usually employs emulsion of DOX-in-Lipiodol®, followed by an embolic agent, has significant limitation of inconsistency and lack of controlled release ability. To address these limitations of conventional TACE material system, we introduced a novel liquid radiopaque embolic material from our pH-sensitive hydrogel. The material has low viscosity that can be injected via a microcatheter, rather biocompatibility, and drug controlled release ability. Importantly, it can form gel in the tumor as well as tumoral vasculature in response to the lowered pH at the tumor site, which proved the potential for the use to treat HCC by TACE therapy.
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Polo Fonseca L, Bergamo Trinca R, Isabel Felisberti M. Thermo-responsive polyurethane hydrogels based on poly(ethylene glycol) and poly(caprolactone): Physico-chemical and mechanical properties. J Appl Polym Sci 2016. [DOI: 10.1002/app.43573] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Lucas Polo Fonseca
- Institute of Chemistry, University of Campinas (UNICAMP); P.O. Box 6154, 13083-970 Campinas SP Brazil
| | - Rafael Bergamo Trinca
- Institute of Chemistry, University of Campinas (UNICAMP); P.O. Box 6154, 13083-970 Campinas SP Brazil
| | - Maria Isabel Felisberti
- Institute of Chemistry, University of Campinas (UNICAMP); P.O. Box 6154, 13083-970 Campinas SP Brazil
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Nguyen QV, Huynh DP, Park JH, Lee DS. Injectable polymeric hydrogels for the delivery of therapeutic agents: A review. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.03.016] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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16
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Li J, Ma L, Chen G, Zhou Z, Li Q. A high water-content and high elastic dual-responsive polyurethane hydrogel for drug delivery. J Mater Chem B 2015; 3:8401-8409. [PMID: 32262893 DOI: 10.1039/c5tb01702e] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Stimuli-responsive hydrogels are soft, biocompatible and smart biomaterials; however, the poor mechanical properties of the hydrogels limit their application. Herein, we prepared a reductant- and light-responsive polyurethane hydrogel which was made of polyethylene glycol, 1,6-diisocyanatohexane, azobenzene, cyclodextrin and disulfide. Attenuated Total Reflectance Infrared Spectra and 1H NMR were used to characterize the structure of the hydrogel. The hydrogel has a high elasticity (a tensile modulus of 36.5 ± 0.5 kPa and a storage modulus of 52.9 ± 1.2 kPa) at a high water content (91.2 ± 0.4%). Swelling, mechanical and rheological properties of the hydrogel can be tuned by the content of the crosslinker, light and reductant. The hydrogel has low cytotoxicity and it can be used for drug delivery. Ultraviolet irradiation helped to load drugs and the reductant accelerated the drug release. With its high mechanical properties and light- and reductant-responsiveness, the hydrogel is hopefully to be used as a drug carrier.
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Affiliation(s)
- Jinze Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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Akash MSH, Rehman K, Chen S. Polymeric-based particulate systems for delivery of therapeutic proteins. Pharm Dev Technol 2015; 21:367-78. [DOI: 10.3109/10837450.2014.999785] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Muhammad Sajid Hamid Akash
- Institute of Pharmacology, Toxicology, and Biochemical Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China,
- Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad, Pakistan, and
| | - Kanwal Rehman
- Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad, Pakistan, and
- Department of Toxicology, School of Medicine and Public Health, Zhejiang University, Hangzhou, China
| | - Shuqing Chen
- Institute of Pharmacology, Toxicology, and Biochemical Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China,
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18
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Zhang L, Ma Y, Zhao C, Zhu X, Chen R, Yang W. Synthesis of pH-responsive hydrogel thin films grafted on PCL substrates for protein delivery. J Mater Chem B 2015; 3:7673-7681. [DOI: 10.1039/c5tb01149c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new visible light induced graft polymerization method was utilized to prepare pH-sensitive hydrogel layers covalently attached to polymer substrates for drug delivery.
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Affiliation(s)
- Lihua Zhang
- Beijing Laboratory of Biomedical Materials
- Beijing University of Chemical Technology
- Beijing 100029
- China
- State Key Laboratory of Chemical Resource Engineering
| | - Yuhong Ma
- Key Laboratory of Carbon Fiber and Functional Polymers
- Ministry of Education
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Changwen Zhao
- Beijing Laboratory of Biomedical Materials
- Beijing University of Chemical Technology
- Beijing 100029
- China
- State Key Laboratory of Chemical Resource Engineering
| | - Xing Zhu
- Beijing Laboratory of Biomedical Materials
- Beijing University of Chemical Technology
- Beijing 100029
- China
- State Key Laboratory of Chemical Resource Engineering
| | - Ruichao Chen
- Beijing Laboratory of Biomedical Materials
- Beijing University of Chemical Technology
- Beijing 100029
- China
- State Key Laboratory of Chemical Resource Engineering
| | - Wantai Yang
- Beijing Laboratory of Biomedical Materials
- Beijing University of Chemical Technology
- Beijing 100029
- China
- State Key Laboratory of Chemical Resource Engineering
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Singh NK, Lee DS. In situ gelling pH- and temperature-sensitive biodegradable block copolymer hydrogels for drug delivery. J Control Release 2014; 193:214-27. [DOI: 10.1016/j.jconrel.2014.04.056] [Citation(s) in RCA: 200] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 04/28/2014] [Accepted: 04/29/2014] [Indexed: 12/22/2022]
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Abstract
Functional polymers bear specified chemical groups, and have specified physical, chemical, biological, pharmacological, or other uses. To adjust the properties while keeping material usage low, a method for direct synthesis of functional polymers is indispensable. Here we show that various functional polymers can be synthesized by in situ cross-linked polymerization/copolymerization. We demonstrate that the polymers synthesized by the facile method using different functional monomers own outstanding pH-sensitivity and pH-reversibility, antifouling property, antibacterial, and anticoagulant property. Our study opens a route for the functionalization of commodity polymers, which lead to important advances in polymeric materials applications.
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Li X, Wang Y, Chen J, Wang Y, Ma J, Wu G. Controlled release of protein from biodegradable multi-sensitive injectable poly(ether-urethane) hydrogel. ACS APPLIED MATERIALS & INTERFACES 2014; 6:3640-3647. [PMID: 24460175 DOI: 10.1021/am405927f] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The synthesis and characterization of multi-sensitive polymers for use as injectable hydrogels for controlled protein/drug delivery is reported. A series of biodegradable multi-sensitive poly(ether-urethane)s were prepared through a simple one-pot condensation of poly(ethylene glycol), 2,2'-dithiodiethanol, N-methyldiethanolamine, and hexamethylene diisocyanate. The sol-gel phase transition behaviors of the obtained copolymers were investigated. Experimental results showed that the aqueous medium comprising the multi-segment copolymers underwent a sol-to-gel phase transition with increasing temperature and pH. At a certain concentration, the copolymer solution could immediately change to a gel under physiological conditions (37 °C and pH 7.4), indicating their suitability as in situ injectable hydrogels in vivo. Insulin was used as a model protein drug for evaluation of the injectable hydrogels as a site-specific drug delivery system. The controlled release of insulin from the hydrogel devices was demonstrated by degradation of the copolymer, which is modulated via the 2,2'-dithiodiethanol content in the poly(ether-urethane)s. These hydrogels having multi-responsive properties may prove to be promising candidates for injectable and controllable protein drug delivery devices.
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Affiliation(s)
- Xiaomeng Li
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, Nankai University , Tianjin 300071, China
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Tang Y, Zhang S, Wang M, Zhu J, Sun T, Jiang G. A glucose-based diblock copolymer: synthesis, characterization and its injectable/temperature-sensitive behaviors. JOURNAL OF POLYMER RESEARCH 2014. [DOI: 10.1007/s10965-014-0390-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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23
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Khoee S, Kavand A. Preparation, co-assembling and interfacial crosslinking of photocurable and folate-conjugated amphiphilic block copolymers for controlled and targeted drug delivery: smart armored nanocarriers. Eur J Med Chem 2013; 73:18-29. [PMID: 24374349 DOI: 10.1016/j.ejmech.2013.11.033] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2013] [Revised: 11/08/2013] [Accepted: 11/23/2013] [Indexed: 11/30/2022]
Abstract
Novel pH-sensitive, biodegradable and biocompatible copolymers based on polycaprolactone-poly(ethylene glycol) (PCL/PEG) were synthesized and further modified with folic acid and/or acryloyl chloride. The mixed polymeric micelles were formed by self-assembling of folated-copolymer and non-folated-copolymer with different compositions via nanoprecipitation method. The solubilization of quercetin as anti-cancer drug by the mixed micelle with the optimized composition (folated/non-folated 20/80) was more efficient than those made of each one alone. Nanogels with different crosslinking density were produced in the presence of ethylene glycol dimethacrylate (EGDMA) as the crosslinker via a photochemical method. Interfacial crosslinking of acrylated groups were utilized to produce a core-shell spherical nanoparticle to evaluate their in-vitro drug release and degradation rate.
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Affiliation(s)
- Sepideh Khoee
- Polymer Laboratory, Chemistry Department, School of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran.
| | - Alireza Kavand
- Polymer Laboratory, Chemistry Department, School of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran
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24
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Wennink J, Signori F, Karperien M, Bronco S, Feijen J, Dijkstra P. Introducing small cationic groups into 4-armed PLLA–PEG copolymers leads to preferred micellization over thermo-reversible gelation. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.11.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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25
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Manokruang K, Lee DS. Albumin-Conjugated pH/Thermo Responsive Poly(amino urethane) Multiblock Copolymer as an Injectable Hydrogel for Protein Delivery. Macromol Biosci 2013; 13:1195-203. [DOI: 10.1002/mabi.201300236] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 06/20/2013] [Indexed: 02/05/2023]
Affiliation(s)
- Kiattikhun Manokruang
- Faculty of Science; Department of Chemistry and Materials Science Research Center; Chiang Mai University; Chiang Mai 50200 Thailand
| | - Doo Sung Lee
- Department of Polymer Science and Chemical Engineering; Theranostic Macromolecules Research Center; Sungkyunkwan University; Suwon Gyeonggi-do 440-746 South Korea
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26
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Preparation and swelling properties of “click” hydrogel from polyaspartamide derivatives using tri-arm PEG and PEG-co-poly(amino urethane) azides as crosslinking agents. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.01.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Gradinaru LM, Ciobanu C, Vlad S, Bercea M, Popa M. Thermoreversible Poly(isopropyl lactate diol)-Based Polyurethane Hydrogels: Effect of Isocyanate on Some Physical Properties. Ind Eng Chem Res 2012. [DOI: 10.1021/ie301690e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Synthesis and characterization of poly(amino urea urethane)-based block copolymer and its potential application as injectable pH/temperature-sensitive hydrogel for protein carrier. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.07.031] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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29
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Jin N, Zhang H, Jin S, Dadmun MD, Zhao B. Shifting Sol–Gel Phase Diagram of a Doubly Thermosensitive Hydrophilic Diblock Copolymer Poly(methoxytri(ethylene glycol) acrylate-co-acrylic acid)-b-poly(ethoxydi(ethylene glycol) acrylate-co-acrylic acid) in Aqueous Solution. Macromolecules 2012. [DOI: 10.1021/ma300791y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Naixiong Jin
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Hao Zhang
- Department of Chemistry, College of Staten Island, CUNY, Staten Island, New
York 10314, United States
| | - Shi Jin
- Department of Chemistry, College of Staten Island, CUNY, Staten Island, New
York 10314, United States
| | - Mark D. Dadmun
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Bin Zhao
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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30
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Loh XJ, Yee BJH, Chia FS. Sustained delivery of paclitaxel using thermogelling poly(PEG/PPG/PCL urethane)s for enhanced toxicity against cancer cells. J Biomed Mater Res A 2012; 100:2686-94. [DOI: 10.1002/jbm.a.34198] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Revised: 02/19/2012] [Accepted: 03/30/2012] [Indexed: 01/31/2023]
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31
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Xia Y, Wang J, Xu S, Liao Q, Zhu X, Wang Y, Wang Y. Dually stimuli-responsive hyperbranched polyethylenimine with LCST transition based on hydrophilic-hydrophobic balance. J Appl Polym Sci 2012. [DOI: 10.1002/app.37743] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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32
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Li G, Wen Q, Zhang T, Ju Y. Synthesis and properties of silver nanoparticles in chitosan-based thermosensitive semi-interpenetrating hydrogels. J Appl Polym Sci 2012. [DOI: 10.1002/app.37609] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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33
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Li G, Guo L, Chang X, Yang M. Thermo-sensitive chitosan based semi-IPN hydrogels for high loading and sustained release of anionic drugs. Int J Biol Macromol 2012; 50:899-904. [DOI: 10.1016/j.ijbiomac.2012.02.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Huynh CT, Nguyen MK, Jeong IK, Kim SW, Lee DS. Synthesis, Characteristics and Potential Application of Poly(β-Amino Ester Urethane)-Based Multiblock Co-Polymers as an Injectable, Biodegradable and pH/Temperature-Sensitive Hydrogel System. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 23:1091-106. [DOI: 10.1163/092050611x575423] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Cong Truc Huynh
- a Theranostic Macromolecules Research Center, Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, South Korea
| | - Minh Khanh Nguyen
- b Theranostic Macromolecules Research Center, Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, South Korea; Department of Biomedical Engineering, Case Western Reverse University, Cleveland, OH 44106, USA
| | - In Ki Jeong
- c Theranostic Macromolecules Research Center, Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, South Korea
| | - Sung Wan Kim
- d Center for Controlled Chemical Delivery, Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT 84112, USA; Department of Bioengineering, College of Engineering, Hanyang University, Seoul, South Korea
| | - Doo Sung Lee
- e Theranostic Macromolecules Research Center, Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, South Korea.
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35
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Liu Y, Chen W, Kim HI. pH-responsive release behavior of genipin-crosslinked chitosan/poly(ethylene glycol) hydrogels. J Appl Polym Sci 2012. [DOI: 10.1002/app.36899] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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36
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Controlling the properties of poly(amino ester urethane)–poly(ethylene glycol)–poly(amino ester urethane) triblock copolymer pH/temperature-sensitive hydrogel. Colloid Polym Sci 2012. [DOI: 10.1007/s00396-012-2624-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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37
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Jin N, Zhang H, Jin S, Dadmun MD, Zhao B. Tuning of thermally induced sol-to-gel transitions of moderately concentrated aqueous solutions of doubly thermosensitive hydrophilic diblock copolymers poly(methoxytri(ethylene glycol) acrylate)-b-poly(ethoxydi(ethylene glycol) acrylate-co-acrylic acid). J Phys Chem B 2012; 116:3125-37. [PMID: 22352399 DOI: 10.1021/jp300298a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
We report in this article a method to tune the sol-to-gel transitions of moderately concentrated aqueous solutions of doubly thermosensitive hydrophilic diblock copolymers that consist of two blocks exhibiting distinct lower critical solution temperatures (LCSTs) in water. A small amount of weak acid groups is statistically incorporated into the lower LCST block so that its LCST can be tuned by varying solution pH. Well-defined diblock copolymers, poly(methoxytri(ethylene glycol) acrylate)-b-poly(ethoxydi(ethylene glycol) acrylate-co-acrylic acid) (PTEGMA-b-P(DEGEA-co-AA)), were prepared by reversible addition-fragmentation chain transfer polymerization and postpolymerization modification. PTEGMA and PDEGEA are thermosensitive water-soluble polymers with LCSTs of 58 and 9 °C, respectively, in water. A 25 wt % aqueous solution of PTEGMA-b-P(DEGEA-co-AA) with a molar ratio of DEGEA to AA units of 100:5.2 at pH = 3.24 underwent multiple phase transitions upon heating, from a clear, free-flowing liquid (<15 °C) to a clear, free-standing gel (15-46 °C) to a clear, free-flowing hot liquid (47-56 °C), and a cloudy mixture (≥57 °C). With the increase of pH, the sol-to-gel transition temperature (T(sol-gel)) shifted to higher values, while the gel-to-sol transition (T(gel-sol)) and the clouding temperature (T(clouding)) of the sample remained essentially the same. These transitions and the tunability of T(sol-gel) originated from the thermosensitive properties of two blocks of the diblock copolymer and the pH dependence of the LCST of P(DEGEA-co-AA), which were confirmed by dynamic light scattering and differential scanning calorimetry studies. Using the vial inversion test method, we mapped out the C-shaped sol-gel phase diagrams of the diblock copolymer in aqueous buffers in the moderate concentration range at three different pH values (3.24, 5.58, and 5.82, all measured at ~0 °C). While the upper temperature boundaries overlapped, the lower temperature boundary shifted upward and the critical gelation concentration increased with the increase of pH. The AA content in PTEGMA-b-P(DEGEA-co-AA) was found to have a significant effect on the pH dependence of T(sol-gel). For PTEGMA-b-P(DEGEA-co-AA) with a molar ratio of DEGEA to AA units of 100:10, the T(sol-gel) of its 25 wt % aqueous solution increased faster with the increase of pH than that of PTEGMA-b-P(DEGEA-co-AA) with a DEGEA-to-AA molar ratio of 100:5.2.
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Affiliation(s)
- Naixiong Jin
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA
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38
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Zhang X, Xiao Y, Lang M. Synthesis and Self-Assembly Behaviors of Four-Arm Star Block Copolymers Poly(ϵ-caprolactone)-b-poly(2- (diethylamino) ethyl methacrylate)) in Aqueous Solution. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2012. [DOI: 10.1080/10601325.2012.641907] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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39
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Liu G, Song J. Electroresponsive behavior of 2-hydroxypropyltrimethyl ammonium chloride chitosan/poly(vinyl alcohol) interpenetrating polymer network hydrogel. POLYM INT 2011. [DOI: 10.1002/pi.3212] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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40
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41
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Karg M, Reinicke S, Lapp A, Hellweg T, Schmalz H. Temperature-Dependent Gelation Behaviour of Double Responsive P2VP-b-PEO-b-P(GME-co-EGE) Triblock Terpolymers: A SANS Study. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.201000142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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42
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Huynh CT, Nguyen MK, Lee DS. Injectable Block Copolymer Hydrogels: Achievements and Future Challenges for Biomedical Applications. Macromolecules 2011. [DOI: 10.1021/ma201261m] [Citation(s) in RCA: 203] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Cong Truc Huynh
- Theranostic Macromolecules Research Center, Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, South Korea
| | - Minh Khanh Nguyen
- Theranostic Macromolecules Research Center, Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, South Korea
- Department of Biomedical Engineering, Case Western Reverse University, Cleveland, Ohio 44106, United States
| | - Doo Sung Lee
- Theranostic Macromolecules Research Center, Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, South Korea
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43
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Biodegradable pH/temperature-sensitive oligo(β-amino ester urethane) hydrogels for controlled release of doxorubicin. Acta Biomater 2011; 7:3123-30. [PMID: 21601018 DOI: 10.1016/j.actbio.2011.05.004] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Revised: 04/19/2011] [Accepted: 05/04/2011] [Indexed: 11/21/2022]
Abstract
An injectable biodegradable pH/temperature-sensitive oligo(β-amino ester urethane) (OAEU) was synthesized. The OAEU was synthesized by addition polymerization between the isocyanate groups of 1,6-diisocyanato hexamethylene and the hydroxyl groups of a synthesized monomer piperazine dihydroxyl amino ester (monomer PDE) in chloroform in the presence of dibutyltin dilaurate as a catalyst. The synthesized OAEU was characterized by (1)H NMR spectroscopy, Fourier transform infrared spectroscopy and gel permeation chromatography. The aqueous solutions of OAEU showed a sol-to-gel-to-sol phase transition as a function of temperature and pH. The gel window covered the physiological conditions (37°C, pH 7.4) and could be controlled by changing the OAEU concentration. After a subcutaneous injection of the OAEU solution into Sprague-Dawley rats, a gel formed rapidly in situ and remained in the body for more than 2 weeks. The in vitro cytotoxicity test and in vitro degradation showed that the OAEU hydrogel was non-cytotoxic and biodegradable. The in vitro release of doxorubicin from this OAEU hydrogel was sustained for more than 10 days. This injectable biodegradable pH/temperature-sensitive OAEU hydrogel is a potential candidate as a drug/protein carrier and in biomedical applications.
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44
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Hilborn J. In vivo
injectable gels for tissue repair. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2011; 3:589-606. [DOI: 10.1002/wnan.91] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jons Hilborn
- Department of Materials Chemistry, Uppsala University, Uppsala 75121, Sweden
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45
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Woodcock JW, Jiang X, Wright RAE, Zhao B. Enzyme-Induced Formation of Thermoreversible Micellar Gels from Aqueous Solutions of Multiresponsive Hydrophilic ABA Triblock Copolymers. Macromolecules 2011. [DOI: 10.1021/ma200991d] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeremiah W. Woodcock
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Xueguang Jiang
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Roger A. E. Wright
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Bin Zhao
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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46
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Jin N, Woodcock JW, Xue C, O’Lenick TG, Jiang X, Jin S, Dadmun MD, Zhao B. Tuning of Thermo-Triggered Gel-to-Sol Transition of Aqueous Solution of Multi-Responsive Diblock Copolymer Poly(methoxytri(ethylene glycol) acrylate-co-acrylic acid)-b-poly(ethoxydi(ethylene glycol) acrylate). Macromolecules 2011. [DOI: 10.1021/ma200384k] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Naixiong Jin
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Jeremiah W. Woodcock
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Chenming Xue
- Department of Chemistry, College of Staten Island, CUNY, Staten Island, New York 10314, United States
| | - Thomas G. O’Lenick
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Xueguang Jiang
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Shi Jin
- Department of Chemistry, College of Staten Island, CUNY, Staten Island, New York 10314, United States
| | - Mark D. Dadmun
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Bin Zhao
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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47
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Zhou W, An X, Gong J, Shen W, Chen Z, Wang X. Synthesis, characteristics, and phase behavior of a thermosensitive and pH-sensitive polyelectrolyte. J Appl Polym Sci 2011. [DOI: 10.1002/app.33833] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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48
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O'Lenick TG, Jin N, Woodcock JW, Zhao B. Rheological properties of aqueous micellar gels of a thermo- and pH-sensitive ABA triblock copolymer. J Phys Chem B 2011; 115:2870-81. [PMID: 21370841 DOI: 10.1021/jp2001332] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This article presents a systematic study of the effect of pH on the rheological properties of aqueous micellar gels formed from 10.0 wt % aqueous solutions of a thermo- and pH-sensitive ABA triblock copolymer, poly(ethoxydi(ethylene glycol) acrylate-co-acrylic acid)-b-poly(ethylene oxide)-b-poly(ethoxydi(ethylene glycol) acrylate-co-acrylic acid) (P(DEGEA-co-AA)-b-PEO-b-P(DEGEA-co-AA)). The block copolymer was synthesized by atom transfer radical polymerization of DEGEA and tert-butyl acrylate with a molar ratio of 100:5 from a difunctional PEO macroinitiator and subsequent removal of tert-butyl groups using trifluoroacetic acid. PDEGEA is a thermosensitive water-soluble polymer with a cloud point of 9 °C in water. The thermo-induced sol-gel transition temperature (T(sol-gel)) of the 10.0 wt % aqueous solution of P(DEGEA-co-AA)-b-PEO-b-P(DEGEA-co-AA) can be continuously and reversibly tuned over a wide temperature range by varying the solution pH. The sol-gel transition became broader with the increase of pH, which stemmed from the weaker and broader LCST transition of P(DEGEA-co-AA) blocks at higher pH values. The maximum value of dynamic storage modulus, obtained from heating ramp, and the plateau storage moduli (G(N)), evaluated from frequency sweeps at three normalized temperatures (T/T(sol-gel) = 1.025, 1.032, and 1.039), decreased with the increase of pH from 3.00 to 5.40 with the sharpest drop observed at pH = ∼4.7. The decrease in G(N) reflects the reduction of the number of bridging polymer chains and simultaneously the increase of the numbers of loops and dangling polymer chains. The ionization of carboxylic acid groups at higher pH values introduced charges onto the thermosensitive blocks and made the polymer chains more hydrophilic, facilitating the formation of loops and dangling chains in the gels. The increase in the number of dangling polymer chains with the increase of pH was supported by fluorescence spectroscopy studies, which showed that the critical micelle concentration of P(DEGEA-co-AA)-b-PEO-b-P(DEGEA-co-AA) at a temperature corresponding to T(sol-gel) was higher at a higher pH. The results reported in this article showed that both T(sol-gel) and gel strength can be tuned by varying the solution pH, providing greater design flexibility for potential applications.
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Affiliation(s)
- Thomas G O'Lenick
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA
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49
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Zhou L, Yu L, Ding M, Li J, Tan H, Wang Z, Fu Q. Synthesis and Characterization of pH-Sensitive Biodegradable Polyurethane for Potential Drug Delivery Applications. Macromolecules 2011. [DOI: 10.1021/ma102346a] [Citation(s) in RCA: 135] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lijuan Zhou
- College of Polymer Science and Engineering, State key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Lunquan Yu
- College of Polymer Science and Engineering, State key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Mingming Ding
- College of Polymer Science and Engineering, State key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Jiehua Li
- College of Polymer Science and Engineering, State key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Hong Tan
- College of Polymer Science and Engineering, State key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Zhigao Wang
- College of Polymer Science and Engineering, State key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Qiang Fu
- College of Polymer Science and Engineering, State key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
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50
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Song J, Liu G, Yang S. Electroresponsive Behavior of 2-Hydroxypropyltrimethyl Ammonium Chloride Chitosan Hydrogel Under DC Electric Field. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2010. [DOI: 10.1080/10601325.2011.537532] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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