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Pal J, Kola P, Samanta P, Mandal M, Dhara D. Polymer Nanoparticles for Preferential Delivery of Drugs Only by Exploiting the Slightly Elevated Temperature of Cancer Cells and Real-Time Monitoring of Drug Release. Biomacromolecules 2024; 25:5181-5197. [PMID: 38943659 DOI: 10.1021/acs.biomac.4c00572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2024]
Abstract
Rapid proliferation and a faster rate of glycolysis in cancer cells often result in an elevated local temperature (40-43 °C) at the tumor site. Nanoparticles prepared from polymers with two lower critical solution temperatures (LCSTs) can be utilized to take advantage of this subtle temperature elevation to deliver anticancer drugs preferably to the cancer cells, thereby enhancing the overall therapeutic efficacy and reducing side effects. In this direction, we synthesized N-vinyl-2-pyrrolidone (NVP) and substituted NVP (sub-NVP: C2-NVP, C4-NVP)-based polymers with precisely controlled LCSTs by varying the ratio of NVP and sub-NVP. The first LCST (LCST1) was kept below 37 °C to promote self-assembly, drug loading, and structural stability in physiological conditions and the second LCST (LCST2) was in the range of 40-43 °C to ensure mild hyperthermia-induced drug release. Additionally, covalent attachment of tetraphenylethylene (TPE, AIEgen) resulted in aggregation-induced emission in thermoresponsive micellar nanoparticles in which TPE acted as a Förster Resonance Energy Transfer (FRET) pair with the loaded anticancer drug doxorubicin (DOX). Tracking of FRET-induced fluorescence recovery of TPE molecules was utilized to confirm the real-time thermoresponsive release of DOX from nanoparticles and eventual localization of TPE in the cytoplasm and DOX in the nucleus. In vitro cellular studies such as cytotoxicity, cellular uptake, and thermoresponsive drug release showed that the DOX-loaded polymeric nanoparticles were nontoxic to normal cells (HEK-293) but significantly more effective in cancer cells (MCF-7) at 40 °C. To our knowledge, this is the first report of preferential delivery of anticancer drugs only by exploiting the slightly elevated temperature of cancer cells.
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Gupta C, Singh P, Vaidya S, Ambre P, Coutinho E. A novel thermoresponsive nano carrier matrix of hyaluronic acid, methotrexate and chitosan to target the cluster of differentiation 44 receptors in tumors. Int J Biol Macromol 2023; 243:125238. [PMID: 37290545 DOI: 10.1016/j.ijbiomac.2023.125238] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 05/28/2023] [Accepted: 06/04/2023] [Indexed: 06/10/2023]
Abstract
Major challenges in current cancer chemotherapy include drug resistance, low efficacy and non-selectivity, resulting in undesirable side effects. In this study, we demonstrate a solution to these challenges that involves a dual targeting approach for tumors that overexpress CD44 receptors. The approach employs a nano-formulation (tHAC-MTX nano assembly), fabricated from hyaluronic acid (HA), the natural ligand for CD44, conjugated with methotrexate (MTX) and complexed with the thermoresponsive polymer 6-O-carboxymethylchitosan (6-OCMC) graft poly(N-isopropylacrylamide) [6-OCMC-g-PNIPAAm]. The thermoresponsive component was designed to have a lower critical solution temperature of 39 °C (the temperature of tumor tissues). In-vitro drug release studies reveal faster release of the drug at the higher temperatures of the tumor tissue likely due to the conformation changes in the thermoresponsive component of the nano assembly. Drug release was also enhanced in the presence of hyaluronidase enzyme. Higher cellular uptake and greater cytotoxicity of the nanoparticles were demonstrated in cancer cells that overexpress CD44 receptors suggesting a receptor binding and cellular uptake mechanism. Such nano-assemblies which incorporate multiple targeting mechanisms have the potential to improve efficacy and decrease side effects of cancer chemotherapy.
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Affiliation(s)
- Chandan Gupta
- Department of Pharmaceutical Chemistry, Bombay College of Pharmacy, Kalina, Santacruz (E), Mumbai 400098, Maharashtra, India
| | - Pinky Singh
- Haffkine Institute for Training, Research and Testing, Acharya Donde Marg, Parel, Mumbai 400012, Maharashtra, India
| | - Shashikant Vaidya
- Haffkine Institute for Training, Research and Testing, Acharya Donde Marg, Parel, Mumbai 400012, Maharashtra, India
| | - Premlata Ambre
- Department of Pharmaceutical Chemistry, Bombay College of Pharmacy, Kalina, Santacruz (E), Mumbai 400098, Maharashtra, India.
| | - Evans Coutinho
- Department of Pharmaceutical Chemistry, Bombay College of Pharmacy, Kalina, Santacruz (E), Mumbai 400098, Maharashtra, India; St John Institute of Pharmacy and Research, Vevoor, Manor Road, Palghar East, Palghar 401404, India
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3
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Thermoresponsive Polymer Assemblies: From Molecular Design to Theranostics Application. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Dually Responsive Poly(N-vinylcaprolactam)-b-poly(dimethylsiloxane)-b-poly(N-vinylcaprolactam) Polymersomes for Controlled Delivery. Molecules 2022; 27:molecules27113485. [PMID: 35684423 PMCID: PMC9182360 DOI: 10.3390/molecules27113485] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 05/19/2022] [Accepted: 05/25/2022] [Indexed: 11/24/2022] Open
Abstract
Limited tissue selectivity and targeting of anticancer therapeutics in systemic administration can produce harmful side effects in the body. Various polymer nano-vehicles have been developed to encapsulate therapeutics and prevent premature drug release. Dually responsive polymeric vesicles (polymersomes) assembled from temperature-/pH-sensitive block copolymers are particularly interesting for the delivery of encapsulated therapeutics to targeted tumors and inflamed tissues. We have previously demonstrated that temperature-responsive poly(N-vinylcaprolactam) (PVCL)-b-poly(dimethylsiloxane) (PDMS)-b-PVCL polymersomes exhibit high loading efficiency of anticancer therapeutics in physiological conditions. However, the in-vivo toxicity of these polymersomes as biocompatible materials has not yet been explored. Nevertheless, developing an advanced therapeutic nanocarrier must provide the knowledge of possible risks from the material’s toxicity to support its future clinical research in humans. Herein, we studied pH-induced degradation of PVCL10-b-PDMS65-b-PVCL10 vesicles in-situ and their dually (pH- and temperature-) responsive release of the anticancer drug, doxorubicin, using NMR, DLS, TEM, and absorbance spectroscopy. The toxic potential of the polymersomes was evaluated in-vivo by intravenous injection (40 mg kg−1 single dose) of PVCL10-PDMS65-PVCL10 vesicles to mice. The sub-acute toxicity study (14 days) included gravimetric, histological, and hematological analyses and provided evidence for good biocompatibility and non-toxicity of the biomaterial. These results show the potential of these vesicles to be used in clinical research.
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Han JO, Lee HJ, Jeong B. Thermosensitive core-rigid micelles of monomethoxy poly(ethylene glycol)-deoxy cholic acid. Biomater Res 2022; 26:16. [PMID: 35484562 PMCID: PMC9052506 DOI: 10.1186/s40824-022-00263-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 03/28/2022] [Indexed: 11/30/2022] Open
Abstract
Background Thermosensitive micelles with rigid cores that exhibit a reversible lower critical solution temperature at 30–35 °C can be applied for drug delivery. Method Hydrophilic monomethoxy poly(ethylene glycol) was conjugated to hydrophobic deoxycholic acid to prepare monomethoxy poly(ethylene glycol)-deoxycholic acid (mPEG-DC). Micelle formation and thermosensitive solution behavior were studied using various methods, including hydrophobic dye solubilization, transmission electron microscopy, dynamic light scattering, turbidity measurement, microcalorimetry, and 1H-NMR spectroscopy. Drug release from the thermosensitive micelles was demonstrated using estradiol, a model drug. Results The mPEG-DC formed micelles with a critical micelle concentration of 0.05 wt.% and an average size of 15 nm. Aqueous mPEG-DC solutions exhibit a lower critical solution temperature (LCST) that is independent of concentration and reversible over heating and cooling cycles. The LCST transition is an entropically driven process involving dehydration of the PEG shell. The thermosensitive mPEG-DC micelles with rigid DC cores were applied as an estradiol delivery system in which estradiol was released, without initial burst, over the 16 days in a diffusion-controlled manner. Conclusions This study suggests that mPEG-DCs form thermosensitive micelles with rigid cores that can function as an excellent diffusion-controlled hydrophobic drug delivery system without initial burst release. Graphical Abstract Thermosensitive core-rigid micelles of monomethoxy poly(ethylene glycol)-deoxy cholic acid![]() Supplementary Information The online version contains supplementary material available at 10.1186/s40824-022-00263-9.
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Affiliation(s)
- Jin Ok Han
- Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, Korea
| | - Hyun Jung Lee
- Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, Korea
| | - Byeongmoon Jeong
- Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, Korea.
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Song W, Wei J, Li L, Qian Y, Wang Y, Bi Y. Cathepsin B and thermal dual‐stimuli responsive linear‐dendritic block copolymer micelles for anticancer drug delivery. POLYM INT 2021. [DOI: 10.1002/pi.6332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wenjie Song
- College of Chemistry and Chemical Engineering Yunnan Normal University Kunming China
| | - Junwu Wei
- College of Chemistry and Chemical Engineering Yunnan Normal University Kunming China
| | - Lindong Li
- College of Chemistry and Chemical Engineering Yunnan Normal University Kunming China
| | - Yangyang Qian
- College of Chemistry and Chemical Engineering Yunnan Normal University Kunming China
| | - Yujia Wang
- College of Chemistry and Chemical Engineering Yunnan Normal University Kunming China
| | - Yunmei Bi
- College of Chemistry and Chemical Engineering Yunnan Normal University Kunming China
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Suárez-Cruz A, Molina-Pinilla I, Hakkou K, Rangel-Núñez C, Bueno-Martínez M. Novel poly(azoamide triazole)s containing twin azobenzene units in the backbone. Synthesis, characterization, and in vitro degradation studies. Polym Degrad Stab 2021. [DOI: 10.1016/j.polymdegradstab.2021.109726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Gayathri V, Jaisankar SN, Samanta D. Temperature and pH responsive polymers: sensing applications. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2021. [DOI: 10.1080/10601325.2021.1988636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Varnakumar Gayathri
- Polymer Science & Technology division, CSIR-Central Leather Research Institute, Chennai, India
- Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh, India
| | - Sellamuthu Nagappan Jaisankar
- Polymer Science & Technology division, CSIR-Central Leather Research Institute, Chennai, India
- Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh, India
| | - Debasis Samanta
- Polymer Science & Technology division, CSIR-Central Leather Research Institute, Chennai, India
- Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh, India
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Pereira P, Serra AC, Coelho JF. Vinyl Polymer-based technologies towards the efficient delivery of chemotherapeutic drugs. Prog Polym Sci 2021. [DOI: 10.1016/j.progpolymsci.2021.101432] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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10
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Biswas G, Jena BC, Samanta P, Mandal M, Dhara D. Synthesis, self-assembly and drug release study of a new dual-responsive biocompatible block copolymer containing phenylalanine derivative. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2021. [DOI: 10.1080/10601325.2021.1947748] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Gargi Biswas
- Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India
| | - Bikash Chandra Jena
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal, India
| | - Pousali Samanta
- Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India
| | - Mahitosh Mandal
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal, India
| | - Dibakar Dhara
- Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India
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Willinger M, Reimhult E. Thermoresponsive Nanoparticles with Cyclic-Polymer-Grafted Shells Are More Stable than with Linear-Polymer-Grafted Shells: Effect of Polymer Topology, Molecular Weight, and Core Size. J Phys Chem B 2021; 125:7009-7023. [PMID: 34156854 PMCID: PMC8279546 DOI: 10.1021/acs.jpcb.1c00142] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 05/26/2021] [Indexed: 11/27/2022]
Abstract
Polymer brush-grafted superparamagnetic iron oxide nanoparticles can change their aggregation state in response to temperature and are potential smart materials for many applications. Recently, the shell morphology imposed by grafting to a nanoparticle core was shown to strongly influence the thermoresponsiveness through a coupling of intrashell solubility transitions and nanoparticle aggregation. We investigate how a change from linear to cyclic polymer topology affects the thermoresponsiveness of poly(2-isopropyl-2-oxazoline) brush-grafted superparamagnetic iron oxide nanoparticles. Linear and cyclic polymers with three different molecular weights (7, 18, and 24.5 kg mol-1) on two different core sizes (3.7 and 9.2 nm) and as free polymer were investigated. We observed the critical flocculation temperature (CFT) during temperature cycling dynamic light scattering experiments, the critical solution temperature (CST), and the transition enthalpy per monomer during differential scanning calorimetry measurements. When all conditions are identical, cyclic polymers increase the colloidal stability and the critical flocculation temperature compared to their linear counterparts. Furthermore, the cyclic polymer shows only one uniform transition, while we observe multiple transitions for the linear polymer shells. We link the single transition and higher colloidal stability to the absence in cyclic PiPrOx shells of a dilute outer part where the particle shells can interdigitate.
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Affiliation(s)
- Max Willinger
- Institute for Biologically Inspired
Materials, Department of Nanobiotechnology, University of Natural Resources and Life Sciences Vienna, Muthgasse 11, 1190 Vienna, Austria
| | - Erik Reimhult
- Institute for Biologically Inspired
Materials, Department of Nanobiotechnology, University of Natural Resources and Life Sciences Vienna, Muthgasse 11, 1190 Vienna, Austria
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Doi N, Yamauchi Y, Ikegami R, Kuzuya M, Sasai Y, Kondo SI. Photo-responsive polymer micelles from o-nitrobenzyl ester-based amphiphilic block copolymers synthesized by mechanochemical solid-state copolymerization. Polym J 2020. [DOI: 10.1038/s41428-020-0387-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wang C, Zhao N, Yuan W. NIR/Thermoresponsive Injectable Self-Healing Hydrogels Containing Polydopamine Nanoparticles for Efficient Synergistic Cancer Thermochemotherapy. ACS APPLIED MATERIALS & INTERFACES 2020; 12:9118-9131. [PMID: 32009384 DOI: 10.1021/acsami.9b23536] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Injectable and self-healing hydrogels with thermoresponsiveness as smart hydrogels displayed injectability, automatic healing, and phase and volume changes as well. Here, the thermoresponsive self-healing hydrogel was prepared via the formation of dynamic covalent enamine bonds between the amino groups in polyetherimide (PEI) and the acetoacetate groups in the four-armed star-shaped poly(2-(dimethylamino)ethyl methacrylate-co-2-hydroxyethyl methacrylate) modified with tert-butyl acetoacetate (t-BAA), SP(DMAEMA-co-HEMA-AA). After adding polydopamine nanoparticles (PDA NPs), the SP(DMAEMA-co-HEMA-AA)/PEI/PDA-NP nanocomposite hydrogel presented phase change and volume shrinkage under near-infrared (NIR) irradiation. The thermoresponsive nanocomposite hydrogel loaded with the anticancer drug doxorubicin (DOX) could be injected into the 4T1 tumor by intratumoral injection. After NIR laser irradiation, the temperature of the hydrogel increased because of the photothermal effect of PDA NPs inducing local hyperthermia. Because the hydrophilicity-hydrophobicity transition of the hydrogel occurred, DOX molecules were squeezed out from the hydrogel at temperatures higher than its lower critical solution temperature (LCST) and the tumor cells suffered from internal stress from the shrunk hydrogel. The injectable nanocomposite hydrogel not only demonstrated the synergism of highly efficient thermochemotherapy but also showed the function of improving drug utilization and precise treatment to reduce the side effects of drugs.
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Affiliation(s)
- Chunyao Wang
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, School of Materials Science and Engineering , Tongji University , Shanghai 201804 , People's Republic of China
| | - Nuoya Zhao
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, School of Materials Science and Engineering , Tongji University , Shanghai 201804 , People's Republic of China
| | - Weizhong Yuan
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, School of Materials Science and Engineering , Tongji University , Shanghai 201804 , People's Republic of China
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Supramolecular control over self-assembly and double thermoresponsive behavior of an amphiphilic block copolymer. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109537] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abebe Alemayehu Y, Tewabe Gebeyehu B, Cheng CC. Photosensitive Supramolecular Micelles with Complementary Hydrogen Bonding Motifs To Improve the Efficacy of Cancer Chemotherapy. Biomacromolecules 2019; 20:4535-4545. [DOI: 10.1021/acs.biomac.9b01322] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Kozlovskaya V, Liu F, Yang Y, Ingle K, Qian S, Halade GV, Urban VS, Kharlampieva E. Temperature-Responsive Polymersomes of Poly(3-methyl- N-vinylcaprolactam)- block-poly( N-vinylpyrrolidone) To Decrease Doxorubicin-Induced Cardiotoxicity. Biomacromolecules 2019; 20:3989-4000. [PMID: 31503464 DOI: 10.1021/acs.biomac.9b01026] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Despite being one of the most potent chemotherapeutics, doxorubicin (DOX) facilitates cardiac toxicity by irreversibly damaging the cardiac muscle as well as severely dysregulating the immune system and impairing the resolution of cardiac inflammation. Herein, we report synthesis and aqueous self-assembly of nanosized polymersomes from temperature-responsive poly(3-methyl-N-vinylcaprolactam)-block-poly(N-vinylpyrrolidone) (PMVC-PVPON) diblock copolymers and demonstrate their potential to minimize DOX cardiotoxicity compared to liposomal DOX. RAFT polymerization of vinylpyrrolidone and 3-methyl-N-vinylcaprolactam, which are structurally similar monomers but have drastically different hydrophobicity, allows decreasing the cloud point of PMVCm-PVPONn copolymers below 20 °C. The lower critical solution temperature (LCST) of the PMVC58-PVPONn copolymer varied from 19.2 to 18.6 and to 15.2 °C by decreasing the length of the hydrophilic PVPONn block from n = 98 to n = 65 and to n = 20, respectively. The copolymers assembled into stable vesicles at room temperature when PVPON polymerization degrees were 65 and 98. Anticancer drug DOX was entrapped with high efficiency into the aqueous PMVC58-PVPON65 polymersomal core surrounded by the hydrophobic temperature-sensitive PMVC shell and the hydrophilic PVPON corona. Unlike many liposomal, micellar, or synthetic drug delivery systems, these polymersomes exhibit an exceptionally high loading capacity of DOX (49%) and encapsulation efficiency (95%) due to spontaneous loading of the drug at room temperature from aqueous DOX solution. We also show that C57BL/6J mice injected with the lethal dose of DOX at 15 mg kg-1 did not survive the 14 day treatment, resulting in 100% mortality. The DOX-loaded PMVC58-PVPON65 polymersomes did not cause any mortality in mice indicating that they can be used for successful DOX encapsulation. The gravimetric analyses of the animal organs from mice treated with liposome-encapsulated DOX (Lipo-DOX) and PMVC58-PVPON65 polymersomes (Poly-DOX) revealed that the Lipo-DOX injection caused some toxicity manifesting as decreased body weight compared to Poly-DOX and saline control. Masses of the left ventricle of the heart, lung, and spleen reduced in the Lipo-DOX-treated mice compared to the nontoxic saline control, while no significant decrease of those masses was observed for the Poly-DOX-treated mice. Our results provide evidence for superior stability of synthetic polymersomes in vivo and show promise for the development of next-generation drug carriers with minimal side effects.
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Affiliation(s)
| | | | | | | | - Shuo Qian
- Neutron Scattering Division, Neutron Sciences Directorate , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | | | - Volker S Urban
- Neutron Scattering Division, Neutron Sciences Directorate , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
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Wei J, Lin F, You D, Qian Y, Wang Y, Bi Y. Self-Assembly and Enzyme Responsiveness of Amphiphilic Linear-Dendritic Block Copolymers Based on Poly( N-vinylpyrrolidone) and Dendritic Phenylalanyl-lysine Dipeptides. Polymers (Basel) 2019; 11:E1625. [PMID: 31597356 PMCID: PMC6836210 DOI: 10.3390/polym11101625] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 09/29/2019] [Accepted: 10/04/2019] [Indexed: 12/23/2022] Open
Abstract
In this study, we present the synthesis, self-assembly, and enzyme responsive nature of a unique class of well-defined amphiphilic linear-dendritic block copolymers (PNVP-b-dendr(Phe-Lys)n, n = 1-3) based on linear poly(N-vinylpyrrolidone) (PNVP) and dendritic phenylalanyl-lysine (Phe-Lys) dipeptides. The copolymers were prepared via a combination ofreversible addition-fragmentation chain transfer (RAFT) /xanthates (MADIX) polymerization of N-vinylpyrrolidone and stepwise peptide chemistry. The results of fluorescence spectroscopy, 1H NMR analyses, transmission electron microscopy (TEM), and particle size analysis demonstrated that the copolymers self-assemble in aqueous solution into micellar nanocontainers that can disassemble and release encapsulated anticancer drug doxorubicin or hydrophobic dye Nile red by trigger of a serine protease trypsin under physiological conditions. The disassembly of the formed micelles and release rates of the drug or dye can be adjusted by changing the generation of dendrons in PNVP-b-dendr(Phe-Lys)n. Furthermore, the cytocompatibility of the copolymers have been confirmed using human lung epithelial cells (BEAS-2B) and human liver cancer cells (SMMC-7721). Due to the fact of their enzyme responsive properties and good biocompatibility, the copolymers may have potential applicability in smart controlled release systems capable of site-specific response.
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Affiliation(s)
- Junwu Wei
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, China
| | - Feng Lin
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, China
| | - Dan You
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, China
| | - Yangyang Qian
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, China
| | - Yujia Wang
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, China
| | - Yunmei Bi
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, China.
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Niu S, Williams GR, Wu J, Wu J, Zhang X, Chen X, Li S, Jiao J, Zhu LM. A chitosan-based cascade-responsive drug delivery system for triple-negative breast cancer therapy. J Nanobiotechnology 2019; 17:95. [PMID: 31506085 PMCID: PMC6737697 DOI: 10.1186/s12951-019-0529-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 08/31/2019] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND It is extremely difficult to develop targeted treatments for triple-negative breast (TNB) cancer, because these cells do not express any of the key biomarkers usually exploited for this goal. RESULTS In this work, we develop a solution in the form of a cascade responsive nanoplatform based on thermo-sensitive poly(N-vinylcaprolactam) (PNVCL)-chitosan (CS) nanoparticles (NPs). These are further modified with the cell penetrating peptide (CPP) and loaded with the chemotherapeutic drug doxorubicin (DOX). The base copolymer was optimized to undergo a phase change at the elevated temperatures of the tumor microenvironment. The acid-responsive properties of CS provide a second trigger for drug release, and the inclusion of CPP should ensure the formulations accumulate in cancerous tissue. The resultant CPP-CS-co-PNVCL NPs could self-assemble in aqueous media into spherical NPs of size < 200 nm and with low polydispersity. They are able to accommodate a high DOX loading (14.8% w/w). The NPs are found to be selectively taken up by cancerous cells both in vitro and in vivo, and result in less off-target cytotoxicity than treatment with DOX alone. In vivo experiments employing a TNB xenograft mouse model demonstrated a significant reduction in tumor volume and prolonging of life span, with no obvious systemic toxicity. CONCLUSIONS The system developed in this work has the potential to provide new therapies for hard-to-treat cancers.
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Affiliation(s)
- Shiwei Niu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, People's Republic of China
| | - Gareth R Williams
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, UK
| | - Jianrong Wu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, People's Republic of China
| | - Junzi Wu
- School of Basic Medicine, Yunnan University of Traditional Chinese Medicine, Kunming, 650500, People's Republic of China
| | - Xuejing Zhang
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, People's Republic of China
| | - Xia Chen
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, People's Republic of China
| | - Shude Li
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Kunming Medical University, Kunming, 650500, People's Republic of China
| | - Jianlin Jiao
- Technology Transfer Center, Kunming Medical University, Kunming, 650031, China.
| | - Li-Min Zhu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, People's Republic of China.
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Sponchioni M, Capasso Palmiero U, Moscatelli D. Thermo-responsive polymers: Applications of smart materials in drug delivery and tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 102:589-605. [PMID: 31147031 DOI: 10.1016/j.msec.2019.04.069] [Citation(s) in RCA: 164] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/02/2019] [Accepted: 04/22/2019] [Indexed: 01/01/2023]
Abstract
Synthetic polymers are attracting great attention in the last decades for their use in the biomedical field as nanovectors for controlled drug delivery, hydrogels and scaffolds enabling cell growth. Among them, polymers able to respond to environmental stimuli have been recently under growing consideration to impart a "smart" behavior to the final product, which is highly desirable to provide it with a specific dynamic and an advanced function. In particular, thermo-responsive polymers, materials able to undergo a discontinuous phase transition or morphological change in response to a temperature variation, are among the most studied. The development of the so-called controlled radical polymerization techniques has paved the way to a high degree of engineering for the polymer architecture and properties, which in turn brought to a plethora of sophisticated behaviors for these polymers by simply switching the external temperature. These can be exploited in many different fields, from separation to advanced optics and biosensors. The aim of this review is to critically discuss the latest advances in the development of thermo-responsive materials for biomedical applications, including a highly controlled drug delivery, mediation of cell growth and bioseparation. The focus is on the structural and design aspects that are required to exploit such materials for cutting-edge applications in the biomedical field.
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Affiliation(s)
- Mattia Sponchioni
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milano, Italy; Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland.
| | - Umberto Capasso Palmiero
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Davide Moscatelli
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milano, Italy
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21
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Peng J, Tang D, Lv H, Wang N, Yang X, Sun Z, Yu Z. Thermal phase transition of poly(N-vinyl caprolactam)-based copolymers: the distribution of hydrophilic units within polymeric chains. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04537-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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22
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Yang Y, Alford A, Kozlovskaya V, Zhao S, Joshi H, Kim E, Qian S, Urban V, Cropek D, Aksimentiev A, Kharlampieva E. Effect of temperature and hydrophilic ratio on the structure of poly(N-vinylcaprolactam)-block-poly(dimethylsiloxane)-block-poly(N-vinylcaprolactam) polymersomes. ACS APPLIED POLYMER MATERIALS 2019; 1:722-736. [PMID: 31828238 PMCID: PMC6905513 DOI: 10.1021/acsapm.8b00259] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Nanosized polymeric vesicles (polymersomes) assembled from ABA triblock copolymers of poly(N-vinylcaprolactam)-poly(dimethylsiloxane)-poly(N-vinylcaprolactam) (PVCL-PDMS-PVCL) are a promising platform for biomedical applications, as the temperature-responsiveness of the PVCL blocks enables reversible vesicle shrinkage and permeability of the polymersome shell at elevated temperatures. Herein, we explore the effects of molecular weight, polymer block weight ratios, and temperature on the structure of these polymersomes via electron microscopy, dynamic light scattering, small angle neutron scattering (SANS), and all-atom molecular dynamic methods. We show that the shell structure and overall size of the polymersome can be tuned by varying the hydrophilic (PVCL) weight fraction of the polymer: at room temperature, polymers of smaller hydrophilic ratios form larger vesicles that have thinner shells, whereas polymers with higher PVCL content exhibit interchain aggregation of PVCL blocks within the polymersome shell above 50 °C. Model fitting and model-free analysis of the SANS data reveals that increasing the mass ratio of PVCL to the total copolymer weight from 0.3 to 0.56 reduces the temperature-induced change in vesicle diameter by a factor of 3 while simultaneously increasing the change in shell thickness by a factor of 1.5. Finally, by analysis of the shell structures and overall size of polymersomes with various PVCL weight ratios and those without temperature-dependent polymer components, we bring into focus the mechanism of temperature-triggered drug release reported in a previous study. This work provides new fundamental perspectives on temperature-responsive polymersomes and elucidates important structure-property relationships of their constituent polymers.
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Affiliation(s)
- Yiming Yang
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama 35205, United States
| | - Aaron Alford
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama 35205, United States
| | - Veronika Kozlovskaya
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama 35205, United States
| | - Shidi Zhao
- Department of Physics, Beckman Institute, University of Illinois at Urbana Champaign, Urbana, Illinois 61801, United States
| | - Himanshu Joshi
- Department of Physics, Beckman Institute, University of Illinois at Urbana Champaign, Urbana, Illinois 61801, United States
| | - Eunjung Kim
- U.S. Army Engineer Research and Development Center, Construction Engineering Research Laboratory, Champaign, Illinois 61822, United States
| | - Shuo Qian
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Volker Urban
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Donald Cropek
- U.S. Army Engineer Research and Development Center, Construction Engineering Research Laboratory, Champaign, Illinois 61822, United States
| | - Aleksei Aksimentiev
- Department of Physics, Beckman Institute, University of Illinois at Urbana Champaign, Urbana, Illinois 61801, United States
| | - Eugenia Kharlampieva
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama 35205, United States
- Center for Nanoscale Materials and Biointegration, University of Alabama at Birmingham, Birmingham, Alabama 35205, United States
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23
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Rumyantsev AM, Leermakers FAM, Zhulina EB, Potemkin II, Borisov OV. Temperature-Induced Re-Entrant Morphological Transitions in Block-Copolymer Micelles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:2680-2691. [PMID: 30720279 DOI: 10.1021/acs.langmuir.8b03747] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Using a combination of a mean-field theoretical method and the numerical Scheutjens-Fleer self-consistent field approach, we predict that it is possible to have re-entrant morphological transitions in nanostructures of diblock copolymers upon variation in temperature-mediated solubility of the associating blocks. This peculiar effect is explained by the different rates in variation of the density of the collapsed core domains and the corresponding interfacial energy as a function of the temperature. The theoretical findings are supported by existing experimental observations of reversed sequences of the morphological transitions occurring upon temperature variation in solutions of amphiphilic block copolymers.
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Affiliation(s)
- Artem M Rumyantsev
- Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, UMR 5254 CNRS UPPA , Pau 64053 , France
- DWI Leibniz Institute for Interactive Materials , Aachen 52056 , Germany
| | - Frans A M Leermakers
- Physical Chemistry and Soft Matter , Wageningen University and Research , Wageningen 6708 WE , The Netherlands
| | - Ekaterina B Zhulina
- Institute of Macromolecular Compounds , Russian Academy of Sciences , St. Petersburg 199004 , Russia
| | - Igor I Potemkin
- DWI Leibniz Institute for Interactive Materials , Aachen 52056 , Germany
- Faculty of Physics , Lomonosov Moscow State University , Moscow 119991 , Russia
- National Research South Ural State University , Chelyabinsk 454080 , Russian Federation
| | - Oleg V Borisov
- Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, UMR 5254 CNRS UPPA , Pau 64053 , France
- Institute of Macromolecular Compounds , Russian Academy of Sciences , St. Petersburg 199004 , Russia
- Peter the Great St. Petersburg State Polytechnic University , 195251 St. Petersburg , Russia
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24
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Pal A, Sarkar AN, Karmakar PD, Pal S. Amphiphilic graft copolymeric micelle using dextrin and poly (N-vinyl caprolactam) via RAFT polymerization: Development and application. Int J Biol Macromol 2018; 119:954-961. [DOI: 10.1016/j.ijbiomac.2018.07.198] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 07/17/2018] [Accepted: 07/31/2018] [Indexed: 11/26/2022]
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25
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Yu J, Chao H, Li G, Tang R, Liu Z, Liu Z, Jiang J. Backbone-Based LCST-Type Hyperbranched Poly(oligo(ethylene glycol)) with CO2
-Reversible Iminoboronate Linkers. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201800346] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jiabao Yu
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an Shaanxi Province 710062 P. R. China
| | - Huan Chao
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an Shaanxi Province 710062 P. R. China
| | - Guo Li
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an Shaanxi Province 710062 P. R. China
| | - Rupei Tang
- Engineering Research Center for Biomedical Materials; School of Life Sciences; Anhui University; Hefei Anhui Province 230601 P. R. China
| | - Zhaotie Liu
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an Shaanxi Province 710062 P. R. China
| | - Zhongwen Liu
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an Shaanxi Province 710062 P. R. China
| | - Jinqiang Jiang
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an Shaanxi Province 710062 P. R. China
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26
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Lee J, Lee B, Park J, Oh J, Kim T, Seo M, Kim SY. Synthesis and phase transition behavior of well-defined Poly(arylene ether sulfone)s by chain growth condensation polymerization in organic media. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.08.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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27
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Zhong Q, Mi L, Metwalli E, Bießmann L, Philipp M, Miasnikova A, Laschewsky A, Papadakis CM, Cubitt R, Schwartzkopf M, Roth SV, Wang J, Müller-Buschbaum P. Effect of chain architecture on the swelling and thermal response of star-shaped thermo-responsive (poly(methoxy diethylene glycol acrylate)-block-polystyrene) 3 block copolymer films. SOFT MATTER 2018; 14:6582-6594. [PMID: 30052259 DOI: 10.1039/c8sm00965a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The effect of chain architecture on the swelling and thermal response of thin films obtained from an amphiphilic three-arm star-shaped thermo-responsive block copolymer poly(methoxy diethylene glycol acrylate)-block-polystyrene ((PMDEGA-b-PS)3) is investigated by in situ neutron reflectivity (NR) measurements. The PMDEGA and PS blocks are micro-phase separated with randomly distributed PS nanodomains. The (PMDEGA-b-PS)3 films show a transition temperature (TT) at 33 °C in white light interferometry. The swelling capability of the (PMDEGA-b-PS)3 films in a D2O vapor atmosphere is better than that of films from linear PS-b-PMDEGA-b-PS triblock copolymers, which can be attributed to the hydrophilic end groups and limited size of the PS blocks in (PMDEGA-b-PS)3. However, the swelling kinetics of the as-prepared (PMDEGA-b-PS)3 films and the response of the swollen film to a temperature change above the TT are significantly slower than that in the PS-b-PMDEGA-b-PS films, which may be related to the conformation restriction by the star-shape. Unlike in the PS-b-PMDEGA-b-PS films, the amount of residual D2O in the collapsed (PMDEGA-b-PS)3 films depends on the final temperature. It decreases from (9.7 ± 0.3)% to (7.0 ± 0.3)% or (6.0 ± 0.3)% when the final temperatures are set to 35 °C, 45 °C and 50 °C, respectively. This temperature-dependent reduction of embedded D2O originates from the hindrance of chain conformation from the star-shaped chain architecture.
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Affiliation(s)
- Qi Zhong
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Engineering Research Center for Eco-Dyeing & Finishing of Textiles, Ministry of Education, National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, 310018 Hangzhou, China. and Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien/Fachgebiet Physik Weicher Materie, James-Franck-Str. 1, 85748 Garching, Germany.
| | - Lei Mi
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Engineering Research Center for Eco-Dyeing & Finishing of Textiles, Ministry of Education, National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, 310018 Hangzhou, China.
| | - Ezzeldin Metwalli
- Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien/Fachgebiet Physik Weicher Materie, James-Franck-Str. 1, 85748 Garching, Germany.
| | - Lorenz Bießmann
- Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien/Fachgebiet Physik Weicher Materie, James-Franck-Str. 1, 85748 Garching, Germany.
| | - Martine Philipp
- Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien/Fachgebiet Physik Weicher Materie, James-Franck-Str. 1, 85748 Garching, Germany.
| | - Anna Miasnikova
- Universität Potsdam, Institut für Chemie, Karl-Liebknecht-Str. 24-25, 14476 Potsdam-Golm, Germany
| | - Andre Laschewsky
- Universität Potsdam, Institut für Chemie, Karl-Liebknecht-Str. 24-25, 14476 Potsdam-Golm, Germany and Fraunhofer Institut für Angewandte Polymerforschung, Geiselbergstr. 69, 14476 Potsdam-Golm, Germany
| | - Christine M Papadakis
- Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien/Fachgebiet Physik Weicher Materie, James-Franck-Str. 1, 85748 Garching, Germany.
| | - Robert Cubitt
- Institut Laue-Langevin, 6 rue Jules Horowitz, 38000 Grenoble, France
| | - Matthias Schwartzkopf
- Deutsches Elektronen-Synchrotron (DESY), Photon Science, Notkestr. 85, 22607 Hamburg, Germany
| | - Stephan V Roth
- Deutsches Elektronen-Synchrotron (DESY), Photon Science, Notkestr. 85, 22607 Hamburg, Germany and KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Jiping Wang
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Engineering Research Center for Eco-Dyeing & Finishing of Textiles, Ministry of Education, National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, 310018 Hangzhou, China.
| | - Peter Müller-Buschbaum
- Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien/Fachgebiet Physik Weicher Materie, James-Franck-Str. 1, 85748 Garching, Germany.
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Davaran S, Fazeli H, Ghamkhari A, Rahimi F, Molavi O, Anzabi M, Salehi R. Synthesis and characterization of novel P(HEMA-LA-MADQUAT) micelles for co-delivery of methotrexate and Chrysin in combination cancer chemotherapy. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2018; 29:1265-1286. [DOI: 10.1080/09205063.2018.1456026] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Soodabeh Davaran
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamed Fazeli
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Fariborz Rahimi
- Department of Electrical Engineering, University of Bonab, Bonab, Iran
| | - Ommoleila Molavi
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Maryam Anzabi
- Center of Functionally Integrative Neuroscience (CFIN) and MINDLab, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Department of Radiology, Neurovascular Research Laboratory, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Roya Salehi
- Drug Applied Research Center and Department of Medical Nanotechnology, School of Advanced Medical Science, Tabriz University of Medical Sciences, Tabriz, Iran
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29
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Ghamkhari A, Massoumi B, Agbolaghi S. An in vitro
focus on doxorubicin hydrochloride delivery of novel pH-responsive poly(2-succinyloxyethylmethacrylate) and poly[(N
-4-vinylbenzyl),N
,N
-diethylamine] diblock copolymers. POLYM INT 2018. [DOI: 10.1002/pi.5504] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | - Samira Agbolaghi
- Chemical Engineering Department, Faculty of Engineering; Azarbaijan Shahid Madani University; Tabriz Iran
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30
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Kumar S, Deike S, Binder WH. One-Pot Synthesis of Thermoresponsive Amyloidogenic Peptide-Polymer Conjugates via Thio-Bromo "Click" Reaction of RAFT Polymers. Macromol Rapid Commun 2017; 39. [PMID: 29076195 DOI: 10.1002/marc.201700507] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 09/13/2017] [Indexed: 11/09/2022]
Abstract
A synthetic strategy to efficiently prepare main-chain peptide-polymer conjugates probing their aggregation in solution is described. An in situ tandem reaction based on aminolysis/thio-bromo "click" reaction is performed to tether an amyloidogenic peptide fragment amyloid-β17-20 (Leu-Val-Phe-Phe (LVFF)) to the ω-chain end of poly(diethylene glycol methyl ether acrylate) (PDEGA), prepared via reversible addition fragmentation chain transfer polymerization. Structural confirmation of the constructed conjugates PDEGA-LVFF (Mn,SEC = 5600, Ð = 1.21), (Mn,SEC = 7600, Ð = 1.16), and (Mn,SEC = 8900, Ð = 1.15) is successfully made by combined studies of 1 H NMR, size-exclusion chromatography, matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry, and electrospray ionization time-of-flight (ESI-TOF) mass spectrometry. The effect of the peptidic constituent on the thermoresponsive behavior of the polymer is examined by UV-vis spectroscopy, and the self-assembly behavior of the amphiphilic conjugate is further exploited, exhibiting micellar morphology in aqueous solution.
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Affiliation(s)
- Sonu Kumar
- Chair of Macromolecular Chemistry, Faculty of Natural Science II (Chemistry Physics and Mathematics), Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 4, Halle (Saale), D-06120, Germany
| | - Stefanie Deike
- Chair of Macromolecular Chemistry, Faculty of Natural Science II (Chemistry Physics and Mathematics), Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 4, Halle (Saale), D-06120, Germany
| | - Wolfgang H Binder
- Chair of Macromolecular Chemistry, Faculty of Natural Science II (Chemistry Physics and Mathematics), Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 4, Halle (Saale), D-06120, Germany
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31
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Shalaeva YV, Morozova JE, Syakaev VV, Kazakova EK, Ermakova AM, Nizameev IR, Kadirov MK, Konovalov AI. Novel thermoresponsive water-soluble oligomers based on amphiphilic calixresorcinarenes. Supramol Chem 2017. [DOI: 10.1080/10610278.2017.1298765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ya. V. Shalaeva
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
- Department of Organic Chemistry, A. M. Butlerov Institute of Chemistry, Kazan Federal University, Kazan, Russian Federation
| | - Ju. E. Morozova
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
- Department of Organic Chemistry, A. M. Butlerov Institute of Chemistry, Kazan Federal University, Kazan, Russian Federation
| | - V. V. Syakaev
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
| | - E. Kh. Kazakova
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
| | - A. M. Ermakova
- Department of Organic Chemistry, A. M. Butlerov Institute of Chemistry, Kazan Federal University, Kazan, Russian Federation
| | - I. R. Nizameev
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
- Department of Physics, Kazan National Research Technical University, Kazan, Russian Federation
| | - M. K. Kadirov
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
| | - A. I. Konovalov
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
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Xue B, Wang W, Qin JJ, Nijampatnam B, Murugesan S, Kozlovskaya V, Zhang R, Velu SE, Kharlampieva E. Highly efficient delivery of potent anticancer iminoquinone derivative by multilayer hydrogel cubes. Acta Biomater 2017; 58:386-398. [PMID: 28583901 PMCID: PMC5736006 DOI: 10.1016/j.actbio.2017.06.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 05/15/2017] [Accepted: 06/02/2017] [Indexed: 01/04/2023]
Abstract
We report a novel delivery platform for a highly potent anticancer drug, 7-(benzylamino)-3,4-dihydro-pyrrolo[4,3,2-de]quinolin-8(1H)-one (BA-TPQ), using pH- and redox-sensitive poly(methacrylic acid) (PMAA) hydrogel cubes of micrometer size as the encapsulating matrix. The hydrogels are obtained upon cross-linking PMAA with cystamine in PMAA/poly(N-vinylpyrrolidone) multilayers assembled within mesoporous sacrificial templates. The BA-TPQ-loaded hydrogels maintain their cubical shape and pH-sensitivity after lyophilization, which is advantageous for long-term storage. Conversely, the particles degrade in vitro in the presence of glutathione (5mM) providing 80% drug release within 24h. Encapsulating BA-TPQ into hydrogels significantly increases its transport via Caco-2 cell monolayers used as a model for oral delivery where the apparent permeability of BA-TPQ-hydrogel cubes was∼2-fold higher than that of BA-TPQ. BA-TPQ-hydrogel cubes exhibit better anticancer activity against HepG2 (IC50=0.52µg/mL) and Huh7 (IC50=0.29µg/mL) hepatoma cells with a 40% decrease in the IC50 compared to the non-encapsulated drug. Remarkably, non-malignant liver cells have a lower sensitivity to BA-TPQ-hydrogel cubes with 2-fold increased IC50 values compared to those of cancer cells. In addition, encapsulating BA-TPQ in the hydrogels amplifies the potency of the drug via down-regulation of MDM2 oncogenic protein and upregulation of p53 (a tumor suppressor) and p21 (cell proliferation suppressor) expression in HepG2 liver cancer cells. Moreover, enhanced inhibition of MDM2 protein expression by BA-TPQ-hydrogel cubes is independent of p53 status in Huh7 cells. This drug delivery platform of non-spherical shape provides a facile method for encapsulation of hydrophobic drugs and can facilitate the enhanced efficacy of BA-TPQ for liver cancer therapy. STATEMENT OF SIGNIFICANCE Many potent anticancer drugs are hydrophobic and lack tumor selectivity, which limits their application in cancer therapy. Although cubical hydrogels of poly(methacrylic acid) exhibit excellent biocompatibility and versatility, they have not been investigated for hydrophobic drug delivery due to poor mechanical stability and incompatibility between hydrophobic drugs and a hydrophilic hydrogel network. In this study, we provide a facile method to prepare a multilayer hydrogel-based platform with controlled nanostructure, cubical shape and redox-responsiveness for delivery of highly potent anticancer therapeutics, hydrophobic BA-TPQ. The BA-TPQ-hydrogel cubes have exceptional structural stability upon lyophilization which is advantageous for a long-term storage. The greatly enhanced trans-epithelial permeability and amplified anti-tumor activity of BA-TPQ are achieved by encapsulation in these hydrogel cubes. Furthermore, the anticancer BA-TPQ-hydrogel platform retains the selective activity of BA-TPQ to hepatocellular carcinoma cells. Overall, the produced BA-TPQ-hydrogel cubes demonstrate a high potential for clinical liver cancer therapy.
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Affiliation(s)
- Bing Xue
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, AL 35294, United States
| | - Wei Wang
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX 79106, United States; Cancer Biology Center, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX 79106, United States
| | - Jiang-Jiang Qin
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX 79106, United States
| | - Bhavitavya Nijampatnam
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, AL 35294, United States
| | - Srinivasan Murugesan
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, AL 35294, United States
| | - Veronika Kozlovskaya
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, AL 35294, United States
| | - Ruiwen Zhang
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX 79106, United States; Cancer Biology Center, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX 79106, United States.
| | - Sadanandan E Velu
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, AL 35294, United States; Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL 35294-3300, United States.
| | - Eugenia Kharlampieva
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, AL 35294, United States; Center of Nanoscale Materials and Biointegration, University of Alabama at Birmingham, Birmingham, AL 35294, United States.
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Kozlovskaya V, Liu F, Xue B, Ahmad F, Alford A, Saeed M, Kharlampieva E. Polyphenolic Polymersomes of Temperature-Sensitive Poly(N-vinylcaprolactam)-block-Poly(N-vinylpyrrolidone) for Anticancer Therapy. Biomacromolecules 2017; 18:2552-2563. [PMID: 28700211 DOI: 10.1021/acs.biomac.7b00687] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report a versatile synthesis for polyphenolic polymersomes of controlled submicron (<500 nm) size for intracellular delivery of high and low molecular weight compounds. The nanoparticles are synthesized by stabilizing the vesicular morphology of thermally responsive poly(N-vinylcaprolactam)n-b-poly(N-vinylpyrrolidone)m (PVCLn-PVPONm) diblock copolymers with tannic acid (TA), a hydrolyzable polyphenol, via hydrogen bonding at a temperature above the copolymer's lower critical solution temperature (LCST). The PVCL179-PVPONm diblock copolymers are produced by controlled reversible addition-fragmentation chain transfer (RAFT) polymerization of PVPON using PVCL as a macro-chain transfer agent. The size of the TA-locked (PVCL179-PVPONm) polymersomes at room temperature and upon temperature variations are controlled by the PVPON chain length and TA:PVPON molar unit ratio. The particle diameter decreases from 1000 to 950, 770, and 250 nm with increasing PVPON chain length (m = 107, 166, 205, 234), and it further decreases to 710, 460, 290, and 190 nm, respectively, upon hydrogen bonding with TA at 50 °C. Lowering the solution temperature to 25 °C results in a slight size increase for vesicles with longer PVPON. We also show that TA-locked polymersomes can encapsulate and store the anticancer drug doxorubicin (DOX) and higher molecular weight fluorescein isothiocyanate (FITC)-dextran in a physiologically relevant pH and temperature range. Encapsulated DOX is released in the nuclei of human alveolar adenocarcinoma tumor cells after 6 h incubation via biodegradation of the TA shell with the cytotoxicity of DOX-loaded polymersomes being concentration-dependent. Our approach offers biocompatible and intracellular degradable nanovesicles of controllable size for delivery of a variety of encapsulated materials. Considering the particle monodispersity, high loading capacity, and a facile two-step aqueous assembly based on the reversible temperature-responsiveness of PVCL, these polymeric vesicles have significant potential as novel drug nanocarriers and provide a new perspective for fundamental studies on thermo-triggered polymer assemblies in solutions.
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Affiliation(s)
- Veronika Kozlovskaya
- Department of Chemistry, University of Alabama at Birmingham , Birmingham, Alabama 35294, United States
| | - Fei Liu
- Department of Chemistry, University of Alabama at Birmingham , Birmingham, Alabama 35294, United States
| | - Bing Xue
- Department of Chemistry, University of Alabama at Birmingham , Birmingham, Alabama 35294, United States
| | - Fahim Ahmad
- Department of Infectious Disease, Drug Discovery Division, Southern Research , Birmingham, Alabama 35205, United States
| | - Aaron Alford
- Department of Chemistry, University of Alabama at Birmingham , Birmingham, Alabama 35294, United States
| | - Mohammad Saeed
- Department of Infectious Disease, Drug Discovery Division, Southern Research , Birmingham, Alabama 35205, United States
| | - Eugenia Kharlampieva
- Department of Chemistry, University of Alabama at Birmingham , Birmingham, Alabama 35294, United States.,Center for Nanoscale Materials and Biointegration, University of Alabama at Birmingham , Birmingham, Alabama 35294, United States
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Zavgorodnya O, Carmona-Moran CA, Kozlovskaya V, Liu F, Wick TM, Kharlampieva E. Temperature-responsive nanogel multilayers of poly(N-vinylcaprolactam) for topical drug delivery. J Colloid Interface Sci 2017; 506:589-602. [PMID: 28759859 DOI: 10.1016/j.jcis.2017.07.084] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 07/20/2017] [Accepted: 07/21/2017] [Indexed: 10/19/2022]
Abstract
We report nanothin temperature-responsive hydrogel films of poly(N-vinylcaprolactam) nanoparticles (νPVCL) with remarkably high loading capacity for topical drug delivery. Highly swollen (νPVCL)n multilayer hydrogels, where n denotes the number of nanoparticle layers, are produced by layer-by-layer hydrogen-bonded assembly of core-shell PVCL-co-acrylic acid nanoparticles with linear PVPON followed by cross-linking of the acrylic acid shell with either ethylene diamine (EDA) or adipic acid dihydrazide (AAD). We demonstrate that a (νPVCL)5 film undergoes dramatic and reversible swelling up to 9 times its dry thickness at pH = 7.5, indicating 89v/v % of water inside the network. These hydrogels exhibit highly reversible ∼3-fold thickness changes with temperature variations from 25 to 50°C at pH = 5, the average pH of human skin. We also show that a (νPVCL)30 hydrogel loaded with ∼120µgcm-2 sodium diclofenac, a non-steroidal anti-inflammatory drug used for osteoarthritis pain management, provides sustained permeation of this drug through an artificial skin membrane for up to 24h at 32°C (the average human skin surface temperature). The cumulative amount of diclofenac transported at 32°C from the (νPVCL)30 hydrogel after 24h is 12 times higher than that from the (νPVCL)30 hydrogel at 22°C. Finally, we demonstrate that the (νPVCL) hydrogels can be used for multiple drug delivery by inclusion of Nile red, fluorescein and DAPI dyes within the νPVCL nanoparticles prior to hydrogel assembly. Using confocal microscopy we observed the presence of separate dye-loaded νPVCL compartments within the hydrogel matrix with all three dyes confined to the nanogel particles without intermixing between the dyes. Our study provides opportunity for development of temperature-responsive multilayer hydrogel coatings made via the assembly of core-shell nanogel particles which can be used for skin-sensitive materials for topical drug delivery.
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Affiliation(s)
- Oleksandra Zavgorodnya
- Department of Chemistry, The University of Alabama at Birmingham, 901 14thSt South, CHEM294, Birmingham, AL, 35294, USA.
| | - Carlos A Carmona-Moran
- Department of Biomedical Engineering, The University of Alabama at Birmingham, 1075 13th Street South, Birmingham, AL 35294, USA.
| | - Veronika Kozlovskaya
- Department of Chemistry, The University of Alabama at Birmingham, 901 14thSt South, CHEM294, Birmingham, AL, 35294, USA.
| | - Fei Liu
- Department of Chemistry, The University of Alabama at Birmingham, 901 14thSt South, CHEM294, Birmingham, AL, 35294, USA.
| | - Timothy M Wick
- Department of Biomedical Engineering, The University of Alabama at Birmingham, 1075 13th Street South, Birmingham, AL 35294, USA.
| | - Eugenia Kharlampieva
- Department of Chemistry, The University of Alabama at Birmingham, 901 14thSt South, CHEM294, Birmingham, AL, 35294, USA; Center for Nanoscale Materials and Biointegration, The University of Alabama at Birmingham, Birmingham, AL 35294, USA.
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35
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Ramasamy T, Ruttala HB, Chitrapriya N, Poudal BK, Choi JY, Kim ST, Youn YS, Ku SK, Choi HG, Yong CS, Kim JO. Engineering of cell microenvironment-responsive polypeptide nanovehicle co-encapsulating a synergistic combination of small molecules for effective chemotherapy in solid tumors. Acta Biomater 2017; 48:131-143. [PMID: 27794477 DOI: 10.1016/j.actbio.2016.10.034] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 10/21/2016] [Accepted: 10/25/2016] [Indexed: 11/17/2022]
Abstract
In this study, we report a facile method to construct a bioactive (poly(phenylalanine)-b-poly(l-histidine)-b-poly(ethylene glycol) polypeptide nanoconstruct to co-load doxorubicin (DOX) and quercetin (QUR) (DQ-NV). The smart pH-sensitive nanovehicle was fabricated with precisely tailored drug-to-carrier ratio that resulted in accelerated, sequential drug release. As a result of ratiometric loading, QUR could significantly enhance the cytotoxic potential of DOX, induced marked cell apoptosis; change cell cycle patterns, inhibit the migratory capacity of sensitive and resistant cancer cells. In particular, pro-oxidant QUR from DQ-NV remarkably reduced the GSH/GSSG ratio, indicating high oxidative stress and damage to cellular components. DQ-NV induced tumor shrinkage more effectively than the single drugs in mice carrying subcutaneous SCC-7 xenografts. DQ-NV consistently induced high expression of caspase-3 and PARP and low expression of Ki67 and CD31 immunomarkers. In summary, we demonstrate the development of a robust polypeptide-based intracellular nanovehicle for synergistic delivery of DOX/QUR in cancer chemotherapy. STATEMENT OF SIGNIFICANCE In this study, we report a facile method to construct bioactive and biodegradable polypeptide nanovehicles as an advanced platform technology for application in cancer therapy. We designed a robust (poly(phenylalanine)-b-poly(l-histidine)-b-poly(ethylene glycol) nanoconstruct to co-load doxorubicin (DOX) and quercetin (QUR) (DQ-NV). The conformational changes of the histidine block at tumor pH resulted in accelerated, sequential drug release. QUR could significantly enhance the cytotoxic potential of DOX, induce marked cell apoptosis, change cell cycle patterns, and inhibit the migratory capacity of sensitive and resistant cancer cells. DQ-NV induced tumor shrinkage more effectively than the single drugs and the 2-drug cocktail in tumor xenografts. In summary, we demonstrate the development of an intracellular nanovehicle for synergistic delivery of DOX/QUR in cancer chemotherapy.
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Affiliation(s)
- Thiruganesh Ramasamy
- College of Pharmacy, Yeungnam University, 214-1, Dae-dong, Gyeongsan 712-749, Republic of Korea
| | - Hima Bindu Ruttala
- College of Pharmacy, Yeungnam University, 214-1, Dae-dong, Gyeongsan 712-749, Republic of Korea
| | - Nataraj Chitrapriya
- Biophysical Chemistry Lab, Yeungnam University, 214-1, Dae-dong, Gyeongsan 712-749, Republic of Korea
| | - Bijay Kumar Poudal
- College of Pharmacy, Yeungnam University, 214-1, Dae-dong, Gyeongsan 712-749, Republic of Korea
| | - Ju Yeon Choi
- College of Pharmacy, Yeungnam University, 214-1, Dae-dong, Gyeongsan 712-749, Republic of Korea
| | - Ssang Tae Kim
- College of Pharmacy, Yeungnam University, 214-1, Dae-dong, Gyeongsan 712-749, Republic of Korea
| | - Yu Seok Youn
- School of Pharmacy, SungKyunKwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon, 440-746, Republic of Korea
| | - Sae Kwang Ku
- College of Korean Medicine, Daegu Haany University, Gyeongsan 712-715, Republic of Korea
| | - Han-Gon Choi
- College of Pharmacy, Institute of Pharmaceutical Science and Technology, Hanyang University, 55, Hanyangdaehak-ro, Sangnok-gu, Ansan 426-791, Republic of Korea.
| | - Chul Soon Yong
- College of Pharmacy, Yeungnam University, 214-1, Dae-dong, Gyeongsan 712-749, Republic of Korea.
| | - Jong Oh Kim
- College of Pharmacy, Yeungnam University, 214-1, Dae-dong, Gyeongsan 712-749, Republic of Korea.
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Han Y, Liu S, Mao H, Tian L, Ning W. Synthesis of Novel Temperature- and pH-Sensitive ABA Triblock Copolymers P(DEAEMA-co-MEO₂MA-co-OEGMA)-b-PEG-b-P(DEAEMA-co-MEO₂MA-co-OEGMA): Micellization, Sol⁻Gel Transitions, and Sustained BSA Release. Polymers (Basel) 2016; 8:E367. [PMID: 30974672 PMCID: PMC6431942 DOI: 10.3390/polym8110367] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 10/01/2016] [Accepted: 10/07/2016] [Indexed: 12/01/2022] Open
Abstract
Novel temperature- and pH-responsive ABA-type triblock copolymers, P(DEAEMA-co-MEO₂MA-co-OEGMA)-b-PEG-b-P(DEAEMA-co-MEO₂MA-co-OEGMA), composed of a poly(ethylene glycol) (PEG) middle block and temperature- and pH-sensitive outer blocks, were synthesized by atom transfer radical polymerization (ATRP). The composition and structure of the copolymer were characterized by ¹H NMR and gel permeation chromatography (GPC). The temperature- and pH-sensitivity, micellization, and the sol⁻gel transitions of the triblock copolymers in aqueous solutions were studied using transmittance measurements, surface tension, viscosity, fluorescence probe technique, dynamic light scattering (DLS), zeta-potential measurements, and transmission electron microscopy (TEM). The lower critical solution temperature (LCST) of the triblock copolymer, which contains a small amount of a weak base group, (N,N-diethylamino) ethyl methacrylate (DEAEMA), can be tuned precisely and reversibly by changing the solution pH. When the copolymer concentration was sufficiently high, increasing temperature resulted in the free-flowing solution transformation into a micellar gel. The sol-to-gel transition temperature (Tsol⁻gel) in aqueous solution will continue to decrease as solution concentration increases.
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Affiliation(s)
- Yanan Han
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Shouxin Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Hongguang Mao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Lei Tian
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Wenyan Ning
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
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Abstract
Drug delivery as a strategy to improve the effect of therapeutic treatment is gaining tremendous interest in biomedical research. The recent advancement in microfluidic technique designed to precisely control the liquid at micro or nano liter level has shed some new lights on reshaping the ongoing drug delivery research. In this aspect, this present mini-review gives an overview on the potential applications of microfluidic technique in the area of drug delivery, which basically covers the fabrication of drug delivery carriers and the design of microfluidic-based smart systems for localized in vivo drug delivery.
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Affiliation(s)
- Wenjian Guan
- Department of Chemical Engineering, Auburn University, 212 Ross Hall, Auburn, AL, 36849, US
| | - Yi Zhang
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 30332-0100, US
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38
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Liu F, Sun Y, Kang C, Zhu H. Pegylated Drug Delivery Systems: From Design to Biomedical Applications. ACTA ACUST UNITED AC 2016. [DOI: 10.1142/s1793984416420022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Pegylation, as a simple procedure to attach hydrophilic polyethylene glycol (PEG) onto therapeutic molecule or drug carriers has been utilized widely to deliver small molecules, proteins and peptides. It was first reported in 1970s by Dr. Frank Davis of Rutgers University and Dr. Abuchowsky in the studies of PEG modified albumin and catalase. The significance of this method at that time was able to successfully modify the enzyme with better hydrophilicity but also keep the enzymatic activity. The employment of PEG has provided superior stability of drug delivery systems (DDS) and enhanced the circulation time in vivo. Simple conjugation of PEG chains with various molecular weights enables the possibility to regulate the properties of desired DDS and led to important contribution in targeting therapy and diagnosis. Pegylation has been reported to be able to protect peptides by shielding antigenic epitopes from reticuloendothelial (RES) clearance and avoid enzymes being recognized by immune system and avoid early degradation. In addition, utilization of PEG in DDS are reported with enhanced delivery efficiency, prolonged circulation time and improved stability, especially active enzymes and peptides drug delivery. In this paper, we will conclude current studies about Pegylated DDS and their biomedical applications from both in vitro and in vivo studies.
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Affiliation(s)
- Fei Liu
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, AL 35209, USA
| | - Yuan Sun
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210, USA
| | - Chen Kang
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, IA 52242, USA
| | - Hongyan Zhu
- Department of Pharmacology, School of Pharmacy, Nantong University, Nantong, Jiangsu, P. R. China
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39
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Sun Y, Kang C, Yao Z, Liu F, Zhou Y. Peptide-Based Ligand for Active Delivery of Liposomal Doxorubicin. ACTA ACUST UNITED AC 2016. [DOI: 10.1142/s1793984416420046] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Doxorubicin (DOX) has been extensively used in the clinic to treat malignant tumors such as leukemias and Hodgkin’s lymphoma. However, the severe cardiotoxicity associated with the use of DOX requests the development of alternative and efficient pharmaceutical formulations. The PEGylated liposome of DOX can significantly reduce the cardiotoxicity but still lacks the active targeting towards cancer cells. Modification of liposomal DOX with active ligands would then be a rational approach to enhance the transportation of the toxin into tumor cells. Currently used targeting ligands include antibodies, proteins, small molecules, and peptides. By virtue of the advantages such as easy preparation, lower cost, and elevated resistance to enzymatic degradation, peptides are attracting a significant amount of interest as active targeting ligands for pharmaceutics. In this paper, we will briefly discuss the application of peptide ligands for the improvement of the therapeutic efficacy of liposomal DOX.
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Affiliation(s)
- Yuan Sun
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, 43210, USA
| | - Chen Kang
- Division of Pharmacology, College of Pharmacy, The Ohio State University, Columbus, OH, 43210, USA
| | - Zhili Yao
- Department of Internal Medicine, The Ohio State University, Columbus, OH, 43210, USA
| | - Fei Liu
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - You Zhou
- College of Biotechnology, Southwest University, Chongqing, 400715, P. R. China
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40
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Zhou Y, Ding R. Quantitative SERS Detection of Trace Glutathione with Internal Reference Embedded Au-core/Ag-shell Nanoparticles. ACTA ACUST UNITED AC 2016. [DOI: 10.1142/s1793984416420034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Surface-enhanced Raman scattering (SERS) has been widely studied and applied for over three decades. However, reliable SERS detection of molecules with low polarizability is still suffering from poor sensitivity and reproducibility. In this paper, we have reported a new strategy for performing quantitative SERS detection of Raman insensitive Glutathione (GSH), based on GSH-induced replacement of a highly Raman sensitive four-mercaptopyridine (MP) adsorbed on the surface of four-aminothiophenol (ATP) embedded Au-core/Ag-shell particles. This replacement led to a strong decrease of the MP SERS signal, which was used to determine the concentration of GSH. The adoption of GSH-induced Raman probe replacement leads to high sensitivity, while the use of internal reference method provides an improved accuracy of the GSH quantification.
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Affiliation(s)
- Yan Zhou
- Department of Chemistry, University of Cincinnati, 2600 Clifton Ave, Cincinnati, OH 45221, USA
| | - Rui Ding
- Department of Chemistry, University of Cincinnati, 2600 Clifton Ave, Cincinnati, OH 45221, USA
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41
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Yao Z, Sun Y, Kang C. Structure and Self-Assembly of Multicolored Naphthalene Diimides Semiconductor. ACTA ACUST UNITED AC 2016. [DOI: 10.1142/s1793984416420071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The one-dimensional (1D) self-assembly of [Formula: see text]-electron molecules offers efficient strategies to enhance energy and charge transfer via highly ordered and conductive [Formula: see text] stacking of the chromophores. The chromophore rich nanostructures have great potential to serve as promising candidate materials for optoelectronic devices. However, the design and control of highly ordered nanostructures with multicolored chromophore redox gradients require finely chosen synthetic strategies and a delicate balance of supramolecular interactions. In this paper, we will introduce new strategies focused on self-assembly of nanofibers based on lysine derivatives functionalized with multi colored chromophores.
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Affiliation(s)
- Zhili Yao
- Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Yuan Sun
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210, USA
| | - Chen Kang
- Division of Pharmacology, College of Pharmacy, The Ohio State University, Columbus, OH 43210, USA
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Morishita K, Murayama S, Araki T, Aoki I, Karasawa S. Thermal- and pH-Dependent Size Variable Radical Nanoparticles and Its Water Proton Relaxivity for Metal-Free MRI Functional Contrast Agents. J Org Chem 2016; 81:8351-62. [PMID: 27541011 DOI: 10.1021/acs.joc.6b01509] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
For development of the metal-free MRI contrast agents, we prepared the supra-molecular organic radical, TEMPO-UBD, carrying TEMPO radical, as well as the urea, alkyl group, and phenyl ring, which demonstrate self-assembly behaviors using noncovalent bonds in an aqueous solution. In addition, TEMPO-UBD has the tertiary amine and the oligoethylene glycol chains (OEGs) for the function of pH and thermal responsiveness. By dynamic light scattering and transmission electron microscopy imaging, the resulting self-assembly was seen to form the spherical nanoparticles 10-150 nm in size. On heating, interestingly, the nanoparticles showed a lower critical solution temperature (LCST) behavior having two-step variation. This double-LCST behavior is the first such example among the supra-molecules. To evaluate of the ability as MRI contrast agents, the values of proton ((1)H) longitudinal relaxivity (r1) were determined using MRI apparatus. In conditions below and above CAC at pH 7.0, the distinguishable r1 values were estimated to be 0.17 and 0.21 mM(-1) s(1), indicating the suppression of fast tumbling motion of TEMPO moiety in a nanoparticle. Furthermore, r1 values became larger in the order of pH 7.0 > 9.0 > 5.0. Those thermal and pH dependencies indicated the possibility of metal-fee MRI functional contrast agents in the future.
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Affiliation(s)
- Kosuke Morishita
- Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Shuhei Murayama
- Department of Molecular Imaging and Theranostics, National Institute of Radiological Sciences (NIRS), QST , Anagawa 4-9-1, Inage, Chiba-city 263-8555, Japan
| | - Takeru Araki
- Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Ichio Aoki
- Department of Molecular Imaging and Theranostics, National Institute of Radiological Sciences (NIRS), QST , Anagawa 4-9-1, Inage, Chiba-city 263-8555, Japan
| | - Satoru Karasawa
- Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan.,PRESTO, Japan Science and Technology Agency , Kawaguchi 332-0012, Japan
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Ulbrich K, Holá K, Šubr V, Bakandritsos A, Tuček J, Zbořil R. Targeted Drug Delivery with Polymers and Magnetic Nanoparticles: Covalent and Noncovalent Approaches, Release Control, and Clinical Studies. Chem Rev 2016; 116:5338-431. [DOI: 10.1021/acs.chemrev.5b00589] [Citation(s) in RCA: 1120] [Impact Index Per Article: 140.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Karel Ulbrich
- Institute
of Macromolecular Chemistry, The Czech Academy of Sciences, v.v.i., Heyrovsky Square 2, 162 06 Prague 6, Czech Republic
| | - Kateřina Holá
- Regional
Centre of Advanced Technologies and Materials, Department of Physical
Chemistry, Faculty of Science, Palacky University, 17 Listopadu 1192/12, 771 46 Olomouc, Czech Republic
| | - Vladimir Šubr
- Institute
of Macromolecular Chemistry, The Czech Academy of Sciences, v.v.i., Heyrovsky Square 2, 162 06 Prague 6, Czech Republic
| | - Aristides Bakandritsos
- Regional
Centre of Advanced Technologies and Materials, Department of Physical
Chemistry, Faculty of Science, Palacky University, 17 Listopadu 1192/12, 771 46 Olomouc, Czech Republic
| | - Jiří Tuček
- Regional
Centre of Advanced Technologies and Materials, Department of Physical
Chemistry, Faculty of Science, Palacky University, 17 Listopadu 1192/12, 771 46 Olomouc, Czech Republic
| | - Radek Zbořil
- Regional
Centre of Advanced Technologies and Materials, Department of Physical
Chemistry, Faculty of Science, Palacky University, 17 Listopadu 1192/12, 771 46 Olomouc, Czech Republic
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44
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Tang YH, Li Z, Li X, Deng M, Karniadakis GE. Non-Equilibrium Dynamics of Vesicles and Micelles by Self-Assembly of Block Copolymers with Double Thermoresponsivity. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00365] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Yu-Hang Tang
- Division of Applied Mathematics, Brown University, Providence, Rhode Island 02912, United States
- Collaboratory on Mathematics for Mesoscopic Modeling of Materials, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Zhen Li
- Division of Applied Mathematics, Brown University, Providence, Rhode Island 02912, United States
- Collaboratory on Mathematics for Mesoscopic Modeling of Materials, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Xuejin Li
- Division of Applied Mathematics, Brown University, Providence, Rhode Island 02912, United States
- Collaboratory on Mathematics for Mesoscopic Modeling of Materials, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Mingge Deng
- Division of Applied Mathematics, Brown University, Providence, Rhode Island 02912, United States
- Collaboratory on Mathematics for Mesoscopic Modeling of Materials, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - George Em Karniadakis
- Division of Applied Mathematics, Brown University, Providence, Rhode Island 02912, United States
- Collaboratory on Mathematics for Mesoscopic Modeling of Materials, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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45
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Rao KM, Rao KSVK, Ha CS. Stimuli Responsive Poly(Vinyl Caprolactam) Gels for Biomedical Applications. Gels 2016; 2:E6. [PMID: 30674138 PMCID: PMC6318617 DOI: 10.3390/gels2010006] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 01/08/2016] [Accepted: 01/13/2016] [Indexed: 11/26/2022] Open
Abstract
Poly(vinyl caprolactam) (PNVCL) is one of the most important thermoresponsive polymers because it is similar to poly(N-isopropyl acrylamide). PNVCL precipitates from aqueous solutions in a physiological temperature range (32⁻34 °C). The use of PNVCL instead of PNIPAM is considered advantageous because of the assumed lower toxicity of PNVCL. PNVCL copolymer gels are sensitive to external stimuli, such as temperature and pH; which gives them a wide range of biomedical applications and consequently attracts considerable scientific interest. This review focuses on the recent studies on PNVCL-based stimuli responsive three dimensional hydrogels (macro, micro, and nano) for biomedical applications. This review also covers the future outlooks of PNVCL-based gels for biomedical applications, particularly in the drug delivery field.
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Affiliation(s)
- Kummara Madhusudana Rao
- Department of Polymer Science and Engineering, Pusan National University, Busan 609 735, Korea.
| | - Kummari Subba Venkata Krishna Rao
- Department of Chemistry, Yogi Vemana University, Kadapa 516 003, Andhra Pradesh, India.
- Department of Chemical Engineering and Material Science, Wayne State University, Detroit, MI48202, USA.
| | - Chang-Sik Ha
- Department of Polymer Science and Engineering, Pusan National University, Busan 609 735, Korea.
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Abstract
Responsive polymers with properties designed to interact with their surrounding environment are enabling "smart" design features for custom biomaterials. Numerous applications are being innovated, ranging from diagnostics and imaging to tissue engineering and drug delivery. Herein, I feature a collection of research articles published in ACS Macro Letters that highlight an array of innovative chemical attributes such as pH-triggered hydrolytic degradation, reduction-based release, photomodulation, glucose responsiveness, thermal sensitivity, and membrane permeating peptides. The chemical, physical, mechanical, and morphological properties of polymeric structures can be custom tailored to enhance numerous features such as biological delivery, pharmaceutical potency and safety, disease diagnosis, and antigen/biomaker detection.
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Affiliation(s)
- Theresa M. Reineke
- Department of Chemistry, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455-0431, United States
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47
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Yuan W, Chen X. Star-shaped and star-block polymers with a porphyrin core: from LCST–UCST thermoresponsive transition to tunable self-assembly behaviour and fluorescence performance. RSC Adv 2016. [DOI: 10.1039/c5ra21647h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The micelles self-assembled from star-shaped and star-block copolymers present a transition of LCST–UCST thermoresponsive properties through a facile quaternization reaction.
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Affiliation(s)
- Weizhong Yuan
- School of Materials Science and Engineering
- Key Laboratory of Advanced Civil Materials of Ministry of Education
- Tongji University
- People's Republic of China
| | - Xiangnan Chen
- School of Materials Science and Engineering
- Key Laboratory of Advanced Civil Materials of Ministry of Education
- Tongji University
- People's Republic of China
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48
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Li Q, Li L, Wang W, Zhang X, Li S, Tian Q, Liu J. In situ synthesis of thermo-responsive ACB triblock terpolymer nanoparticles through seeded RAFT polymerization. RSC Adv 2016. [DOI: 10.1039/c6ra08725f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
ACB triblock terpolymer nanoparticles containing two thermo-responsive blocks are prepared by seeded RAFT polymerization and their thermo-response is checked.
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Affiliation(s)
- Quanlong Li
- State Key Laboratory of High Performance Civil Engineering Materials
- Jiangsu Research Institute of Building Science
- Nanjing
- China
- Jiangsu Sobute New Materials Co., Ltd
| | - Lei Li
- State Key Laboratory of High Performance Civil Engineering Materials
- Jiangsu Research Institute of Building Science
- Nanjing
- China
- Jiangsu Sobute New Materials Co., Ltd
| | - Wenbin Wang
- State Key Laboratory of High Performance Civil Engineering Materials
- Jiangsu Research Institute of Building Science
- Nanjing
- China
- Jiangsu Sobute New Materials Co., Ltd
| | - Xiaolei Zhang
- State Key Laboratory of High Performance Civil Engineering Materials
- Jiangsu Research Institute of Building Science
- Nanjing
- China
- Jiangsu Sobute New Materials Co., Ltd
| | - Shentong Li
- State Key Laboratory of High Performance Civil Engineering Materials
- Jiangsu Research Institute of Building Science
- Nanjing
- China
- Jiangsu Sobute New Materials Co., Ltd
| | - Qian Tian
- State Key Laboratory of High Performance Civil Engineering Materials
- Jiangsu Research Institute of Building Science
- Nanjing
- China
- Jiangsu Sobute New Materials Co., Ltd
| | - Jiaping Liu
- College of Materials Science and Engineering
- Southeast University
- Nanjing 211189
- China
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49
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Jia F, Wang S, Zhang X, Xiao C, Tao Y, Wang X. Amino-functionalized poly(N-vinylcaprolactam) derived from lysine: a sustainable polymer with thermo and pH dual stimuli response. Polym Chem 2016. [DOI: 10.1039/c6py01487a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lysine, a renewable feedstock with economic feasibility, was tactfully cyclized to its corresponding cyclic lysine and then subjected to a reaction with acetylenes to yield a sustainable N-vinylcaprolactam (VCL) derivative. Well-defined PVCL with pendent amino groups was prepared via MADIX/RAFT polymerization.
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Affiliation(s)
- Fan Jia
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- People's Republic of China
| | - Shixue Wang
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- People's Republic of China
| | - Xiaojie Zhang
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- People's Republic of China
| | - Chunsheng Xiao
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- People's Republic of China
| | - Youhua Tao
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- People's Republic of China
| | - Xianhong Wang
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- People's Republic of China
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50
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Pineda-Contreras BA, Schmalz H, Agarwal S. pH dependent thermoresponsive behavior of acrylamide–acrylonitrile UCST-type copolymers in aqueous media. Polym Chem 2016. [DOI: 10.1039/c6py00162a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
pH-dependent UCST-transitions and influence of sacrificial additives on the thermoresponsivity of acrylamide- acrylonitrile copolymers is shown.
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Affiliation(s)
- Beatriz A. Pineda-Contreras
- University of Bayreuth
- Faculty of Biology
- Chemistry and Earth Sciences
- Macromolecular Chemistry II
- Bayreuth Center for Colloids and Interfaces
| | - Holger Schmalz
- University of Bayreuth
- Faculty of Biology
- Chemistry and Earth Sciences
- Macromolecular Chemistry II
- Bayreuth Center for Colloids and Interfaces
| | - Seema Agarwal
- University of Bayreuth
- Faculty of Biology
- Chemistry and Earth Sciences
- Macromolecular Chemistry II
- Bayreuth Center for Colloids and Interfaces
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