99901
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Wang M, Fu J, Zhang Y, Chen Z, Wang M, Zhu J, Cui W, Zhang J, Xu Q. Removal of Rhodamine B, a Cationic Dye From Aqueous Solution Using Poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) Nanotubes. Journal of Macromolecular Science, Part A 2015. [DOI: 10.1080/10601325.2015.980745] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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99902
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Mahadev Patil R, Ghanwat AA, Ganugapati S, Gnaneshwar R. Synthesis and Characterization of Four-Arm Star Poly(ϵ-caprolactone)-Block-Poly(cyclic-carbonate methacrylate) Copolymers by Combining Ring-Opening Polymerization With Atom Transfer Radical Polymerization. Journal of Macromolecular Science, Part A 2015. [DOI: 10.1080/10601325.2015.980761] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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99903
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Asadian M, Rashidi A, Majidi M, Mehrjoo M, Emami BA, Tavassoli H, Asl MP, Bonakdar S. Nanofiber protein adsorption affected by electrospinning physical processing parameters. J IRAN CHEM SOC 2015. [DOI: 10.1007/s13738-014-0569-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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99904
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Zhou R, Shi X, Gao Y, Cai N, Jiang Z, Xu X. Anti-inflammatory activity of guluronate oligosaccharides obtained by oxidative degradation from alginate in lipopolysaccharide-activated murine macrophage RAW 264.7 cells. J Agric Food Chem 2015; 63:160-168. [PMID: 25483391 DOI: 10.1021/jf503548a] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Alginate has notably diverse pharmacological activities. The present study investigated the anti-inflammatory activity of the guluronate oligosaccharides prepared by oxidative degradation (GOS-OD) from alginate. GOS-OD significantly attenuated the production of nitric oxide (NO), prostaglandin E2 (PGE2), and reactive oxygen species (ROS), the expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase (COX)-2, and the secretion of pro-inflammatory cytokines in lipopolysaccharide (LPS)-activated murine macrophage RAW 264.7 cells. Moreover, GOS-OD potently decreased the binding of LPS to the cell surface and LPS-induced Toll-like receptor 4 (TLR4) and cluster of differentiation (CD) 14 expression. Additionally, GOS-OD could remarkably inhibit the LPS-induced activation of nuclear factor (NF)-κB and mitogen-activated protein (MAP) kinase pathways in RAW 264.7 cells. These results indicate that GOS-OD may reduce the LPS-stimulated inflammatory responses through blocking the activation of NF-κB and MAP kinases, suggesting that GOS-OD may be considered as a potential nutraceutical for inflammation.
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99905
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99906
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Nie JJ, Dou XB, Hu H, Yu B, Chen DF, Wang RX, Xu FJ. Poly(aspartic acid)-based degradable assemblies for highly efficient gene delivery. ACS Appl Mater Interfaces 2015; 7:553-562. [PMID: 25434705 DOI: 10.1021/am506730t] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Due to its good properties such as low cytotoxicity, degradability, and biocompatibility, poly(aspartic acid) (PAsp) is a good candidate for the development of new drug delivery systems. In this work, a series of new PAsp-based degradable supramolecular assemblies were prepared for effective gene therapy via the host-guest interactions between the cyclodextrin (CD)-cored PAsp-based polycations and the pendant benzene group-containing PAsp backbones. Such supramolecular assemblies exhibited good degradability, enhanced pDNA condensation ability, and low cytotoxicity. More importantly, the gene transfection efficiencies of supramolecular assemblies were much higher than those of CD-cored PAsp-based counterparts at various N/P ratios. In addition, the effective antitumor ability of assemblies was demonstrated with a suicide gene therapy system. The present study would provide a new means to produce degradable supramolecular drug delivery systems.
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Affiliation(s)
- Jing-Jun Nie
- State Key Laboratory of Chemical Resource Engineering, College of Materials Science & Engineering, Beijing University of Chemical Technology , Beijing 100029, China
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99907
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Jain K, Verma AK, Mishra PR, Jain NK. Characterization and evaluation of amphotericin B loaded MDP conjugated poly(propylene imine) dendrimers. Nanomedicine 2015; 11:705-13. [PMID: 25596078 DOI: 10.1016/j.nano.2014.11.008] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 11/10/2014] [Accepted: 11/23/2014] [Indexed: 12/29/2022]
Abstract
This paper describes a novel strategy for targeted delivery of amphotericin B (AmB) to macrophages with muramyl dipeptide (MDP) conjugated multimeric poly(propyleneimine) (PPI) dendrimers. Synergistic antiparasitic activity due to immunostimulation by multimeric presentation of MDP on dendrimers was anticipated. MDP conjugated 5.0G PPI (MdPPI) dendrimers were synthesized and characterized. Therapeutic activity and toxicity of dendrimeric formulation of AmB (MdPPIA) were compared with marketed formulations of AmB. Highly significant (P<0.01) reduction in toxicity was observed in hemolytic toxicity and cytotoxicity studies in erythrocytes and J774A.1 macrophage cells, respectively. Formulation MdPPIA showed appreciable macrophage targeting potential and higher or equivalent antiparasitic activity against parasite infected macrophage cell lines and in vivo infection in Balb/c mice. These results suggest the developed MDP conjugated dendrimeric formulation of AmB as a promising immunostimulant targeted drug delivery system and a safer alternative to marketed formulations. From the clinical editor: Parasitic infections remain a significant issue in the clinical setting. The authors in this article studied the use of ligand anchored dendrimeric formulation of Amphotericin B to target infected macrophages and showed reduced toxicity, high anti-leishmanial activity. This may add another treatment option to available formulations in the future.
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Affiliation(s)
- Keerti Jain
- Pharmaceutics Research Laboratory, Department of Pharmaceutical Sciences, Dr. H. S. Gour Central University, Sagar, India; Pharmaceutical Nanotechnology Research Laboratory, ISF College of Pharmacy, Moga, India
| | - Ashwni Kumar Verma
- Pharmaceutics Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, India
| | - Prabhat Ranjan Mishra
- Pharmaceutics Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, India
| | - Narendra Kumar Jain
- Pharmaceutics Research Laboratory, Department of Pharmaceutical Sciences, Dr. H. S. Gour Central University, Sagar, India; Pharmaceutical Nanotechnology Research Laboratory, ISF College of Pharmacy, Moga, India.
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99908
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Li D, Wen S, Shi X. Dendrimer-entrapped metal colloids as imaging agents. Wiley Interdiscip Rev Nanomed Nanobiotechnol 2015; 7:678-90. [PMID: 25641958 DOI: 10.1002/wnan.1331] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Revised: 11/09/2014] [Accepted: 12/05/2014] [Indexed: 01/23/2023]
Abstract
This review reports the recent advances in dendrimer-entrapped metal colloids as contrast agents for biomedical imaging applications. The versatile dendrimer scaffolds with 3-dimensional spherical shape, highly branched internal cavity, tunable surface conjugation chemistry, and excellent biocompatibility and nonimmunogenicity afford their uses as templates to create multifunctional dendrimer-entrapped metal colloids for mono- or multi- mode molecular imaging applications. In particular, multifunctional dendrimer-entrapped gold nanoparticles with different surface modifications have been used for fluorescence imaging, targeted tumor computed tomography (CT) imaging, enhanced blood pool CT imaging, dual mode CT/MR imaging, and tumor theranostics (combined CT imaging and chemotherapy) will be introduced and discussed in detail.
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Affiliation(s)
- Du Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, People's Republic of China
| | - Shihui Wen
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, People's Republic of China
| | - Xiangyang Shi
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, People's Republic of China.,College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, People's Republic of China
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99909
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Bingjun Q, Jung J, Zhao Y. Impact of Acidity and Metal Ion on the Antibacterial Activity and Mechanisms of β- and α-Chitosan. Appl Biochem Biotechnol 2015; 175:2972-85. [DOI: 10.1007/s12010-014-1413-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2014] [Accepted: 11/17/2014] [Indexed: 11/27/2022]
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99910
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Svobodová J, Proks V, Karabiyik Ö, Çalıkoğlu Koyuncu AC, Torun Köse G, Rypáček F, Studenovská H. Poly(amino acid)-based fibrous scaffolds modified with surface-pendant peptides for cartilage tissue engineering. J Tissue Eng Regen Med 2015; 11:831-842. [DOI: 10.1002/term.1982] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Revised: 08/07/2014] [Accepted: 11/28/2014] [Indexed: 12/19/2022]
Affiliation(s)
- Jana Svobodová
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Square 2 162 06 Prague 6 Czech Republic
| | - Vladimír Proks
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Square 2 162 06 Prague 6 Czech Republic
| | - Özge Karabiyik
- Yeditepe University; Department of Genetics and Bioengineering; 34755 Istanbul Turkey
| | | | - Gamze Torun Köse
- Yeditepe University; Department of Genetics and Bioengineering; 34755 Istanbul Turkey
- BIOMATEN Centre of Excellence in Biomaterials and Tissue Engineering; METU; Ankara Turkey
| | - František Rypáček
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Square 2 162 06 Prague 6 Czech Republic
| | - Hana Studenovská
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Square 2 162 06 Prague 6 Czech Republic
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99911
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Xu J, Yang J, Ye X, Ma C, Zhang G, Pispas S. Synthesis and properties of amphiphilic and biodegradable poly(ε-caprolactone-co
-glycidol) copolymers. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27515] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jinbao Xu
- Faculty of Materials Science and Engineering; South China University of Technology; Guangzhou 510640 People's Republic of China
| | - Jinxian Yang
- Hefei National Laboratory for Physical Sciences at Microscale; Department of Chemical Physics; University of Science and Technology of China; Hefei 230026 People's Republic of China
| | - Xiaodong Ye
- Hefei National Laboratory for Physical Sciences at Microscale; Department of Chemical Physics; University of Science and Technology of China; Hefei 230026 People's Republic of China
| | - Chunfeng Ma
- Faculty of Materials Science and Engineering; South China University of Technology; Guangzhou 510640 People's Republic of China
| | - Guangzhao Zhang
- Faculty of Materials Science and Engineering; South China University of Technology; Guangzhou 510640 People's Republic of China
- Hefei National Laboratory for Physical Sciences at Microscale; Department of Chemical Physics; University of Science and Technology of China; Hefei 230026 People's Republic of China
| | - Stergios Pispas
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation; 48 Vassileos Constantinou Avenue 11635 Athens Greece
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99912
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Augustine R, Saha A, Jayachandran VP, Thomas S, Kalarikkal N. Dose-Dependent Effects of Gamma Irradiation on the Materials Properties and Cell Proliferation of Electrospun Polycaprolactone Tissue Engineering Scaffolds. INT J POLYM MATER PO 2015. [DOI: 10.1080/00914037.2014.977900] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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99913
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Affiliation(s)
- Xuepei Miao
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
| | - Yan Meng
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
| | - Xiaoyu Li
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
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99914
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Park W, Na K. Advances in the synthesis and application of nanoparticles for drug delivery. Wiley Interdiscip Rev Nanomed Nanobiotechnol 2015; 7:494-508. [PMID: 25583540 DOI: 10.1002/wnan.1325] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 11/08/2014] [Indexed: 01/17/2023]
Abstract
The continuous development of drug delivery systems (DDSs) has been extensively researched by the need to maximize therapeutic efficacy while minimizing undesirable side effects. Nanoparticle technology was recently shown to hold great promise for drug delivery applications in nanomedicine due to its beneficial properties, such as better encapsulation, bioavailability, control release, and lower toxic effect. Despite the great progress in nanomedicine, there remain many limitations for clinical application. To overcome these limitations, advanced nanoparticles for drug delivery have been developed to enable the spatially and temporally controlled release of drugs in response to specific stimuli at disease sites. Furthermore, the controlled self-assembly of organic and inorganic materials may enable their use in theranostic applications. This review presents an overview of a recent advanced nanoparticulate system that can be used as a potential drug delivery carrier and focuses on the potential applications of nanoparticles in various biomedical fields for human health care.
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Affiliation(s)
- Wooram Park
- Department of Biotechnology, The Catholic University of Korea, Bucheon-si, Korea
| | - Kun Na
- Department of Biotechnology, The Catholic University of Korea, Bucheon-si, Korea
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99915
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Sato K, Matsubara K, Hagiwara S, Saito K, Yagi M, Takagi S, Yui T. Remarkable stimulation of emission quenching on a clay surface. Langmuir 2015; 31:27-31. [PMID: 25540843 DOI: 10.1021/la504597t] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Tetra-cationic pyrene derivative (Py(4+)) and tris(bipyridine)ruthenium(II) (Ru(2+)) were hybridized onto the surface of a synthesized clay. We observed the remarkable stimulation of excited Py(4+) emission quenching on the clay surface, with a very large apparent quenching rate constant (kq = 7.4 ± 0.7 × 10(15) L mol(-1) s(-1)).
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Affiliation(s)
- Keita Sato
- Department of Material Science and Technology, Faculty of Engineering, and Center for Transdisciplinary Research, Niigata University , 8050 Ikarashi-2, Niigata 950-2181, Japan
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99916
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Affiliation(s)
- Hendrik Kattner
- Institut für Physikalische
Chemie, Georg-August-Universität Göttingen, Tammannstr.
6, D-37077 Göttingen, Germany
| | - Michael Buback
- Institut für Physikalische
Chemie, Georg-August-Universität Göttingen, Tammannstr.
6, D-37077 Göttingen, Germany
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99917
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Wang H, Thorling CA, Liang X, Bridle KR, Grice JE, Zhu Y, Crawford DHG, Xu ZP, Liu X, Roberts MS. Diagnostic imaging and therapeutic application of nanoparticles targeting the liver. J Mater Chem B 2015; 3:939-958. [PMID: 32261972 DOI: 10.1039/c4tb01611d] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Liver diseases, particularly viral hepatitis, cirrhosis and hepatocellular carcinoma, are common in clinical practice with high morbidity and mortality worldwide. Many substances for diagnostic imaging and therapy of liver diseases may have either severe adverse effects or insufficient effectiveness in vivo because of their nonspecific uptake. Therefore, by targeting the delivery of drugs into the liver or specific liver cells, drug efficiency may be largely improved. This review summarizes the up-to-date research progress focusing on nanoparticles targeting the liver for both diagnostic and therapeutic purposes. Targeting strategies, mechanisms of enhanced effects, and clinical applications of nanoparticles are discussed specifically. We believe that new targeting nanotechnology such as nanoprobes for multi-modality imaging and multifunctional nanoparticles would facilitate significant advancements in this active research area in the near future.
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Affiliation(s)
- Haolu Wang
- Therapeutics Research Centre, School of Medicine, The University of Queensland, Princess Alexandra Hospital, Woolloongabba, QLD 4102, Australia.
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99918
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Davachi SM, Kaffashi B. Preparation and Characterization of Poly L-Lactide/Triclosan Nanoparticles for Specific Antibacterial and Medical Applications. INT J POLYM MATER PO 2015. [DOI: 10.1080/00914037.2014.977897] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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99919
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Ifuku S, Hori T, Izawa H, Morimoto M, Saimoto H. Preparation of zwitterionically charged nanocrystals by surface TEMPO-mediated oxidation and partial deacetylation of α-chitin. Carbohydr Polym 2015; 122:1-4. [PMID: 25817635 DOI: 10.1016/j.carbpol.2014.12.060] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 12/24/2014] [Accepted: 12/27/2014] [Indexed: 11/26/2022]
Abstract
Zwitterionic nanocrystals were prepared by TEMPO-mediated oxidation, partial deacetylation, and subsequent mechanical disintegration of α-chitin. The pH dependence of the morphology, transparency, and viscosity of the nanocrystals were evaluated. After those reactions, the carboxylate and amino group contents of the chitin derivative were 0.45 and 1.26 mmol/g, respectively. After mechanical treatment, the water dispersion consisted of nanocrystals approximately 250 nm long and 10nm thick. Under acidic and basic conditions, the water dispersions were highly transparent. On the other hand, under neutral conditions, the dispersion was turbid due to the ionic interaction between the cationic and anionic groups on the nanocrystal surface. Although the surface zwitterionic nanocrystals collected from acidic and basic dispersion were randomly oriented due to electrostatic repulsions, nanocrystals formed aggregates in neutral water due to the cationic and anionic interaction between them. Nanocrystals in neutral water had higher viscosity than those in acidic and basic water, since ionic interaction caused nanocrystal networks to form in water.
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Affiliation(s)
- Shinsuke Ifuku
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama-cho, Minami 680-8552, Tottori, Japan.
| | - Taishi Hori
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama-cho, Minami 680-8552, Tottori, Japan
| | - Hironori Izawa
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama-cho, Minami 680-8552, Tottori, Japan
| | - Minoru Morimoto
- Research Center for Bioscience and Technology, Tottori University, 4-101 Koyama-cho, Minami 680-8550, Tottori, Japan
| | - Hiroyuki Saimoto
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama-cho, Minami 680-8552, Tottori, Japan
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99920
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Huang CL, Peng SY, Wang YJ, Chen WC, Lin JH. Microstructure and characterization of electrospun poly(vinyl alcohol) nanofiber scaffolds filled with graphene nanosheets. J Appl Polym Sci 2015. [DOI: 10.1002/app.41891] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Chien-Lin Huang
- Department of Fiber and Composite Materials; Feng Chia University; Taichung 40724 Taiwan
| | - Sheng-Yin Peng
- Department of Fiber and Composite Materials; Feng Chia University; Taichung 40724 Taiwan
| | - Yu-Jyun Wang
- Department of Fiber and Composite Materials; Feng Chia University; Taichung 40724 Taiwan
| | - Wen-Cheng Chen
- Department of Fiber and Composite Materials; Feng Chia University; Taichung 40724 Taiwan
| | - Jia-Horng Lin
- Department of Fiber and Composite Materials; Feng Chia University; Taichung 40724 Taiwan
- School of Chinese Medicine; China Medical University; Taichung 40402 Taiwan
- Department of Biotechnology; Asia University; Taichung 41354 Taiwan
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99921
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99922
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Toughraï S, Malinova V, Masciadri R, Menon S, Tanner P, Palivan C, Bruns N, Meier W. Reduction-sensitive amphiphilic triblock copolymers self-assemble into stimuli-responsive micelles for drug delivery. Macromol Biosci 2015; 15:481-9. [PMID: 25641960 DOI: 10.1002/mabi.201400400] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 11/19/2014] [Indexed: 11/09/2022]
Abstract
Polymeric nanostructures obtained through self-assembly of reduction-sensitive amphiphilic triblock copolymers were investigated as potential drug delivery systems. The characteristic feature of these polymers is their cleavable disulfide bond in the center of the hydrophobic block. Therefore, the triblock copolymers can be cleaved into amphiphilic diblock copolymers. A poly(2-hydroxyethyl methacrylate)-b-poly(butyl methacrylate)-S-S-poly(butyl methacrylate)-b-poly(2-hydroxyethyl methacrylate) (PHEMA-b-(PBMA-S-S-PBMA)-b-PHEMA) triblock copolymer was synthesized. It self-assembled into micelles which were used to encapsulate hydrophobic dye molecules (Nile Red, BodiPy 630/650) as model payloads. The self-assembled nanostructures disintegrated upon reduction of the disulfide bond, releasing their cargo and yielding larger particles that formed aggregates in solution after 24 h. A burst release of payload was shown within the first 15 min, followed by a constant release over several hours. As concentration gradients of reducing agents are commonly found in biological systems, the micelles could be used as redox-sensitive nanocarriers for the intracellular delivery of drugs.
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Affiliation(s)
- Smahan Toughraï
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland
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99923
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Mallakpour S, Dinari M, Azadi E. Poly(vinyl alcohol) Chains Grafted onto the Surface of Copper Oxide Nanoparticles: Application in Synthesis and Characterization of Novel Optically Active and Thermally Stable Nanocomposites Based on Poly(amide-imide) ContainingN-trimellitylimido-L-valine Linkage. International Journal of Polymer Analysis and Characterization 2015. [DOI: 10.1080/1023666x.2015.976396] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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99924
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Bicciocchi E, Haeussler M, Rizzardo E, Scully AD, Ghiggino KP. Donor-acceptor rod-coil block copolymers comprising poly[2,7-(9,9-dihexylfluorene)-alt
-bithiophene] and fullerene as compatibilizers for organic photovoltaic devices. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27514] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Erika Bicciocchi
- School of Chemistry, The University of Melbourne; Victoria 3010 Australia
- CSIRO Manufacturing Flagship, Clayton; Victoria 3168 Australia
| | | | - Ezio Rizzardo
- School of Chemistry, The University of Melbourne; Victoria 3010 Australia
- CSIRO Manufacturing Flagship, Clayton; Victoria 3168 Australia
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99925
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Zhiltsov A, Gritsenko O, Kazakova V, Gorbatsevitch O, Bessonova N, Askadskii A, Serenko O, Muzafarov A. Polylactide and hybrid silicasol nanoparticle-based composites. J Appl Polym Sci 2015. [DOI: 10.1002/app.41894] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Andrey Zhiltsov
- N.S. Enikolopov Institute of Synthetic Polymeric Materials, Russian Academy of Sciences; Moscow 117393 Russia
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences; Moscow 119991 Russia
| | - Oleg Gritsenko
- N.S. Enikolopov Institute of Synthetic Polymeric Materials, Russian Academy of Sciences; Moscow 117393 Russia
| | - Valentina Kazakova
- N.S. Enikolopov Institute of Synthetic Polymeric Materials, Russian Academy of Sciences; Moscow 117393 Russia
| | - Olga Gorbatsevitch
- N.S. Enikolopov Institute of Synthetic Polymeric Materials, Russian Academy of Sciences; Moscow 117393 Russia
| | | | - Andrey Askadskii
- N.S. Enikolopov Institute of Synthetic Polymeric Materials, Russian Academy of Sciences; Moscow 117393 Russia
| | - Olga Serenko
- N.S. Enikolopov Institute of Synthetic Polymeric Materials, Russian Academy of Sciences; Moscow 117393 Russia
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences; Moscow 119991 Russia
| | - Aziz Muzafarov
- N.S. Enikolopov Institute of Synthetic Polymeric Materials, Russian Academy of Sciences; Moscow 117393 Russia
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences; Moscow 119991 Russia
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99926
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Zhou Z, He S, Huang T, Peng C, Zhou H, Liu Q, Zeng W, Liu L, Huang H, Xiang L, Yan H. Preparation of gelatin/hyaluronic acid microspheres with different morphologies for drug delivery. Polym Bull (Berl) 2015. [DOI: 10.1007/s00289-015-1300-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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99927
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Pietropaolo A, Wang Y, Nakano T. Predicting the switchable screw sense in fluorene-based polymers. Angew Chem Int Ed Engl 2015; 54:2688-92. [PMID: 25641571 DOI: 10.1002/anie.201411313] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 12/09/2014] [Indexed: 11/05/2022]
Abstract
A chirality-switching free-energy landscape was reconstructed on a 43-mer of poly(9,9-dioctylfluoren-2,7-diyl) (PDOF). The simulations were conducted on amorphous silica surface as well as in the vacuum phase for a single chain or for a group of sixteen chains. The achiral-to-chiral transition occurs only on amorphous silica (activation free-energy 35 kcal mol(-1) ), where the enantiomeric (homochiral) basins are detected. This was supported by the experiments where effective chirality induction to PDOF using circularly polarized light (CPL) was attained only for a film deposited on a quartz glass and not for a solution or a suspension. These results indicate that interactions of PDOF with amorphous silica play a crucial role in chirality switching. Importance of chain assembling was also indicated. Theoretical ECD spectra of the enantiomeric basins containing a 51 helix reproduce the experimental spectra.
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Affiliation(s)
- Adriana Pietropaolo
- Dipartimento di Scienze della Salute, Università di Catanzaro, Viale Europa, 88100 Catanzaro (Italy).
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99928
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99929
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Abstract
Chemistry, pure and applied, is a science and an industry. By its power over the expressions of matter, it also displays the creativity of art. It has expanded from molecular to supramolecular chemistry and then, by way of constitutional dynamic chemistry, towards adaptive chemistry. Constitutional dynamics allow for adaptation, through component exchange and selection in response to physical stimuli (e.g. light, photoselection), to chemical effectors (e.g. metal ions, metalloselection) or to environmental effects (e.g. phase change) in equilibrium or out-of-equilibrium conditions, towards the generation of the best-adapted/fittest constituent(s) in a dynamic set. Such dynamic systems can be represented by two-dimensional or three-dimensional dynamic networks that define the agonistic and antagonistic relationships between the different constituents linked through component exchange. The introduction of constitutional dynamics into materials science opens perspectives towards adaptive materials and technologies, presenting attractive behavioral features (such as self-healing). In particular, dynamic polymers may undergo modification of their properties (mechanical, optical, etc.) through component exchange and recombination in response to physical or chemical agents. Constitutional adaptive materials open towards a systems materials science and offer numerous opportunities for soft-matter technologies.
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Affiliation(s)
- Jean-Marie Lehn
- ISIS, Institut de Science et d'Ingénierie Supramoléculaires, 8, allée Gaspard Monge 67000 Strasbourg (France).
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99930
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Liu J, Liu W, Weitzhandler I, Bhattacharyya J, Li X, Wang J, Qi Y, Bhattacharjee S, Chilkoti A. Ring-opening polymerization of prodrugs: a versatile approach to prepare well-defined drug-loaded nanoparticles. Angew Chem Int Ed Engl 2015; 54:1002-6. [PMID: 25427831 PMCID: PMC4293338 DOI: 10.1002/anie.201409293] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 10/21/2014] [Indexed: 12/14/2022]
Abstract
The synthesis of polymer-drug conjugates from prodrug monomers consisting of a cyclic polymerizable group that is appended to a drug through a cleavable linker is achieved by organocatalyzed ring-opening polymerization. The monomers polymerize into well-defined polymer prodrugs that are designed to self-assemble into nanoparticles and release the drug in response to a physiologically relevant stimulus. This method is compatible with structurally diverse drugs and allows different drugs to be copolymerized with quantitative conversion of the monomers. The drug loading can be controlled by adjusting the monomer(s)/initiator feed ratio and drug release can be encoded into the polymer by the choice of linker. Initiating these monomers from a poly(ethylene glycol) macroinitiator results in amphiphilic diblock copolymers that spontaneously self-assemble into micelles with a long plasma circulation, which is useful for systemic therapy.
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Affiliation(s)
- Jinyao Liu
- Department of Biomedical Engineering, Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, NC 27708 USA
| | - Wenge Liu
- Department of Biomedical Engineering, Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, NC 27708 USA
| | - Isaac Weitzhandler
- Department of Biomedical Engineering, Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, NC 27708 USA
| | - Jayanta Bhattacharyya
- Department of Biomedical Engineering, Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, NC 27708 USA
| | - Xinghai Li
- Department of Biomedical Engineering, Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, NC 27708 USA
| | - Jing Wang
- Department of Biomedical Engineering, Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, NC 27708 USA
| | - Yizhi Qi
- Department of Biomedical Engineering, Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, NC 27708 USA
| | - Somnath Bhattacharjee
- Department of Biomedical Engineering, Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, NC 27708 USA
| | - Ashutosh Chilkoti
- Department of Biomedical Engineering, Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, NC 27708 USA
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99931
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Teixeira FC, Rangel CM, Teixeira APS. Synthesis of New Azole Phosphonate Precursors for Fuel Cells Proton Exchange Membranes. Heteroatom Chem 2015. [DOI: 10.1002/hc.21254] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Fátima C. Teixeira
- Laboratório Nacional de Energia e Geologia, I.P; Estrada do Paço do Lumiar, 22 1649-038 Lisboa Portugal
| | - C. M. Rangel
- Laboratório Nacional de Energia e Geologia, I.P; Estrada do Paço do Lumiar, 22 1649-038 Lisboa Portugal
| | - António P. S. Teixeira
- Departamento de Química, Escola de Ciências e Tecnologia; Centro de Química de Évora; Instituto de Investigação e Formação Avançada; Universidade de Évora; R. Romão Ramalho, 59 7000-671 Évora Portugal
- Centro de Química Estrutural, IST; Universidade de Lisboa; Av. Rovisco Pais, 1 1049-001 Lisboa Portugal
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99932
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Masoud SM, Mailyan AK, Dorcet V, Roisnel T, Dixneuf PH, Bruneau C, Osipov SN. Metathesis Catalysts with Fluorinated Unsymmetrical NHC Ligands. Organometallics 2015. [DOI: 10.1021/om501077w] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Salekh M. Masoud
- A.N.
Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str. 28, 119991, Moscow, Russia
- UMR 6226 CNRS-Université de Rennes 1, Institut des Sciences Chimiques de Rennes, Organométalliques:
Matériaux et Catalyse, Centre for Catalysis and Green Chemistry, Campus de Beaulieu, 35042 Rennes, France
| | - Artur K. Mailyan
- A.N.
Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str. 28, 119991, Moscow, Russia
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
| | - Vincent Dorcet
- UMR 6226 CNRS-Université de Rennes 1, Institut des Sciences Chimiques de Rennes, Centre de Diffractométrie
X, Campus de Beaulieu, 35042 Rennes, France
| | - Thierry Roisnel
- UMR 6226 CNRS-Université de Rennes 1, Institut des Sciences Chimiques de Rennes, Centre de Diffractométrie
X, Campus de Beaulieu, 35042 Rennes, France
| | - Pierre H. Dixneuf
- UMR 6226 CNRS-Université de Rennes 1, Institut des Sciences Chimiques de Rennes, Organométalliques:
Matériaux et Catalyse, Centre for Catalysis and Green Chemistry, Campus de Beaulieu, 35042 Rennes, France
| | - Christian Bruneau
- UMR 6226 CNRS-Université de Rennes 1, Institut des Sciences Chimiques de Rennes, Organométalliques:
Matériaux et Catalyse, Centre for Catalysis and Green Chemistry, Campus de Beaulieu, 35042 Rennes, France
| | - Sergey N. Osipov
- A.N.
Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str. 28, 119991, Moscow, Russia
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99933
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Chen D, Wei Z, Yao Y, Liu B. A tree-step computational approach to simplify conformational determination of cellobiose and lactose. Carbohydr Res 2015; 401:51-7. [PMID: 25464081 DOI: 10.1016/j.carres.2014.10.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 10/27/2014] [Accepted: 10/29/2014] [Indexed: 11/29/2022]
Abstract
Great theoretical attentions have been paid on the conformational preference of individual molecular building blocks of carbohydrates because it is helpful for assignments of the experimental signals and explorations of the biological implications. A tree-step approach is applied here to simplify the conformational determination of phenyl β-cellobioside and benzyl β-lactoside, for which 35 and 23 initial structures are built, respectively. After the high-level calculations, low-energy conformers are determined and then compared with previous experimental and theoretical results. The low-energy conformers are reconstructed in our work for both cellobiose and lactose and the results show a quantitative agreement between the experimental signature and the predicted IR vibration assignment. In addition, two low-energy conformers, which are predicted in our work, have not been reported by the previous work using the traditional method. The tree-step computational approach provides an alternative timesaving and accurate method to focus on determining the preferred conformations of disaccharides.
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Affiliation(s)
- Dong Chen
- Institute of Photo-Biophysics, Physics and Electronics Department, Henan University, 475004 Kaifeng, China.
| | - Zhichao Wei
- Institute of Photo-Biophysics, Physics and Electronics Department, Henan University, 475004 Kaifeng, China
| | - Yuheng Yao
- Institute of Photo-Biophysics, Physics and Electronics Department, Henan University, 475004 Kaifeng, China
| | - Bo Liu
- Institute of Photo-Biophysics, Physics and Electronics Department, Henan University, 475004 Kaifeng, China.
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99934
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Lopez CG, Watanabe T, Martel A, Porcar L, Cabral JT. Microfluidic-SANS: flow processing of complex fluids. Sci Rep 2015; 5:7727. [PMID: 25578326 PMCID: PMC4289890 DOI: 10.1038/srep07727] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 12/09/2014] [Indexed: 11/09/2022] Open
Abstract
Understanding and engineering the flow-response of complex and non-Newtonian fluids at a molecular level is a key challenge for their practical utilisation. Here we demonstrate the coupling of microfluidics with small angle neutron scattering (SANS). Microdevices with high neutron transmission (up to 98%), low scattering background (≲10⁻² cm⁻¹), broad solvent compatibility and high pressure tolerance (≈3-15 bar) are rapidly prototyped via frontal photo polymerisation. Scattering from single microchannels of widths down to 60 μm, with beam footprint of 500 μm diameter, was successfully obtained in the scattering vector range 0.01-0.3 Å(-1), corresponding to real space dimensions of ≃10-600 Å. We demonstrate our approach by investigating the molecular re-orientation and alignment underpinning the flow response of two model complex fluids, namely cetyl trimethylammonium chloride/pentanol/D₂O and sodium lauryl sulfate/octanol/brine lamellar systems. Finally, we assess the applicability and outlook of microfluidic-SANS for high-throughput and flow processing studies, with emphasis of soft matter.
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Affiliation(s)
- Carlos G Lopez
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Takaichi Watanabe
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Anne Martel
- Institute Laue-Langevin, BP 1566 rue Jules Horowitz, 380 42 Cedex 9 Grenoble, France
| | - Lionel Porcar
- Institute Laue-Langevin, BP 1566 rue Jules Horowitz, 380 42 Cedex 9 Grenoble, France
| | - João T Cabral
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK
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99935
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Liu D, Zhang C, Zhang X, Zhen Z, Wang P, Li J, Yi D, Jin Y, Yang D. Permeation measurement of gestodene for some biodegradable materials using Franz diffusion cells. Saudi Pharm J 2015; 23:413-20. [PMID: 27134544 PMCID: PMC4834674 DOI: 10.1016/j.jsps.2015.01.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 01/01/2015] [Indexed: 01/21/2023] Open
Abstract
Biodegradable poly(d,l-lactide) (PDLLA), Poly(trimethylene carbonate) (PTMC), polycaprolactone (PCL), poly(caprolactone-co-d,l-lactide) (PCDLLA) and poly(trimethylene carbonate-co-caprolactone) (PTCL) are recently used for clinical drug delivery system such as subcutaneous contraceptive implant capsule due to their biodegradable properties that they could possess long-term stable performance in vivo without removal, however their permeation rate is unknown. In the work, biodegradable material membranes were prepared by solvent evaporation using chloroform, and commercial silicone rubber membrane served as a control. Gestodene was used as a model drug. Gestodene has high biologic progestational activity which allows for high contraceptive reliability at very low-dose levels. The permeation rate of gestodene for several biodegradable materials was evaluated. In vitro diffusion studies were done using Franz diffusion cells with a diffusion area of 1.33 cm2. Phosphate buffer solution (PBS, pH 7.4), 10% methanol solution and distilled water were taken in donor and receiver chambers at temperature of 37 °C respectively. The in vitro experiments were conducted over a period of 24 h during which samples were collected at regular intervals. The withdrawn samples were appropriately diluted and measured on UV–vis spectrophotometer at 247 nm. Conclusion data from our study showed that permeation rate of PCDLLA with CL ratio more than 70% could be more excellent than commercial silicone rubber membrane. They may be suitable as a candidate carrier for gestodene subcutaneous contraceptive implants in contraceptive fields.
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Affiliation(s)
| | - Chong Zhang
- Corresponding author. Tel.: +86 24 86800665; fax: +86 24 86806307.
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99936
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99937
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Abstract
Currently used plastics are mostly produced from petrochemical products, but there is a growing demand for eco-friendly plastics. The use of bio-based plastics, which are produced from renewable resources, and biodegradable plastics, which are degraded in the environment, will lead to a more sustainable society and help us solve global environmental and waste management problems.
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Affiliation(s)
- Tadahisa Iwata
- Laboratory of Science of Polymeric Materials, Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657 (Japan).
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99938
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Abstract
Hydrogels provide mechanical support and a hydrated environment that offer good cytocompatibility and controlled release of molecules, and myriad hydrogels thus have been studied for biomedical applications. In the past few decades, research in these areas has shifted increasingly to multicomponent hydrogels that better capture the multifunctional nature of native biological environments and that offer opportunities to selectively tailor materials properties. This review summarizes recent approaches aimed at producing multicomponent hydrogels, with descriptions of contemporary chemical and physical approaches for forming networks, and of the use of both synthetic and biologically derived molecules to impart desired properties. Specific multicomponent materials with enhanced mechanical properties are presented, as well as materials in which multiple biological functions are imparted for applications in tissue engineering, cancer treatment, and gene therapies. The progress in the field suggests significant promise for these approaches in the development of biomedically relevant materials.
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Affiliation(s)
- Hang Kuen Lau
- Department of Materials Science and Engineering and ‡Biomedical Engineering, University of Delaware , Newark Delaware 19716, United States
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99939
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Radula-janik K, Kupka T, Ejsmont K, Daszkiewicz Z, Sauer SPA. Molecular modeling and experimental studies on structure and NMR parameters of 9-benzyl-3,6-diiodo-9H-carbazole. Struct Chem 2015; 26:997-1006. [DOI: 10.1007/s11224-014-0554-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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99940
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Lattin JR, Pitt WG. Factors affecting ultrasonic release from eLiposomes. J Pharm Sci 2015; 104:1373-84. [PMID: 25641709 DOI: 10.1002/jps.24344] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 11/12/2014] [Accepted: 12/08/2014] [Indexed: 11/07/2022]
Abstract
Liposomes containing emulsion droplets (eLiposomes) were studied as ultrasound-responsive liposomal drug carriers. This paper presents the effects of temperature, eLiposome size, and ultrasound parameters on the ultrasonically actuated release of calcein, to test hypotheses concerning the physics of acoustic droplet vaporization with regard to vapor pressure and Laplace pressure. Small (200 nm) eLiposomes containing 100-nm emulsion droplets were formed and compared with large (800 nm) eLiposomes containing 100- or 450-nm droplets. Calcein release was quantified by spectroscopic methods. Various experiments examined the influence of perfluorocarbon (PFC) droplet size, vesicle size, temperature, PFC composition and vapor pressure, insonation time, and insonation frequency. Results showed that eLiposome samples released significantly more calcein than their conventional liposome counterparts. Surprisingly, temperature (which directly controls vapor pressure) did not have a strong effect on ultrasound-induced calcein release. In general, calcein release decreased with decreasing droplet size, as hypothesized based on Laplace pressure. Release decreased with increased ultrasound frequency if the pressure amplitude and exposure time were maintained constant, indicating that the gas-phase nucleation rate may have an important role in rupture of eLiposomes. Interestingly, when ultrasound of the same mechanical index was applied at two frequencies, the amount of release correlated strongly with the mechanical index.
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Affiliation(s)
- James R Lattin
- Chemical Engineering Department, Brigham Young University, Provo, Utah, 84602
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99941
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Rossi F, Ferrari R, Castiglione F, Mele A, Perale G, Moscatelli D. Polymer hydrogel functionalized with biodegradable nanoparticles as composite system for controlled drug delivery. Nanotechnology 2015; 26:015602. [PMID: 25490351 DOI: 10.1088/0957-4484/26/1/015602] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The possibility to direct pharmacological treatments targeting specific cell lines using polymer nanoparticles is one of the main novelties and perspectives in nanomedicine. However, sometimes, the ability to maintain NPs localized at the site of the injection that work as a drug reservoir can represent a good and complementary option. In this direction we built a composite material made of polymeric hydrogel functionalized with polymer NPs. ϵ-caprolactone and polyethylene glycol have been copolymerized in a two-step synthesis of PEGylated NPs, while hydrogel was synthesized through polycondensation between NPs, agarose and branched polyacrylic acid. NP functionalization was verified with Fourier transform infrared spectroscopy (FTIR), high resolution magic angle spinning-nuclear magnetic resonance (HRMAS-NMR) spectroscopy and release kinetics from a hydrogel matrix and compared with NPs only physically entrapped into a hydrogel matrix. The characteristics of the resulting composite hydrogel-NPs system were studied both in terms of rheological properties and in its ability to sustain the release of To-Pro3, used as a drug mimetic compound to represent a promising drug delivery device.
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99942
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Pozza GME, Crotty S, Rawiso M, Schubert US, Lutz PJ. Molecular and Structural Characterization of Hybrid Poly(ethylene oxide)–Polyhedral Oligomeric Silesquioxanes Star-Shaped Macromolecules. J Phys Chem B 2015; 119:1669-80. [DOI: 10.1021/jp505191d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Gladys M.-E. Pozza
- University of Strasbourg, Institut Charles Sadron, CNRS UPR 22, 23, rue du Loess 67034, Strasbourg, France
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Sarah Crotty
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
| | - Michel Rawiso
- University of Strasbourg, Institut Charles Sadron, CNRS UPR 22, 23, rue du Loess 67034, Strasbourg, France
| | - Ulrich S. Schubert
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
- Jena
Center for Soft Matter (JCSM), Friedrich Schiller University, Philosophenweg 7, 07743 Jena, Germany
| | - Pierre J. Lutz
- University of Strasbourg, Institut Charles Sadron, CNRS UPR 22, 23, rue du Loess 67034, Strasbourg, France
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
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99943
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Mahmood R. Purification of anti-bromelain antibodies by affinity precipitation using pNIPAm-linked bromelain. Prep Biochem Biotechnol 2015; 46:161-4. [PMID: 25569629 DOI: 10.1080/10826068.2014.996232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Affinity precipitation has emerged as a very useful technique for the purification of proteins. Here it has been employed for the purification of anti-bromelain antibodies from rabbit serum. A system has been developed for reversibly binding and thermoprecipitating antibodies. Anti-bromelain antibodies were raised in rabbit by immunizing it with bromelain. Poly-N-isopropylacrylamide (pNIPAm)-bromelain conjugate was prepared and incubated with rabbit serum. After that the temperature was raised for thermal precipitation of the polymer. Antibodies were then eluted from the complex by incubating it with a small volume of buffer, pH 3.0. This method is very effective in concentrating the antibodies. Purity and specificity of the antibodies were checked by gel electrophoresis and enzyme-linked immunosorbent assay (ELISA), respectively. The study of the effect of pH and temperature on the binding of the antibodies to the conjugate showed that the optimum binding occurred at pH 8.0 and 25°C.The polymer enzyme conjugate was further used for another cycle.
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Affiliation(s)
- Rubab Mahmood
- a Interdisciplinary Biotechnology Unit , Aligarh Muslim University , Aligarh , India
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99944
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Nagase K, Hatakeyama Y, Shimizu T, Matsuura K, Yamato M, Takeda N, Okano T. Thermoresponsive Cationic Copolymer Brushes for Mesenchymal Stem Cell Separation. Biomacromolecules 2015; 16:532-40. [DOI: 10.1021/bm501591s] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Kenichi Nagase
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), 8-1 Kawadacho, Shinjuku,
Tokyo 162-8666, Japan
| | - Yuri Hatakeyama
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), 8-1 Kawadacho, Shinjuku,
Tokyo 162-8666, Japan
- Department
of Life Science and Medical Bioscience, School of Advanced Science
and Engineering, Waseda University (TWIns), 2-2 Wakamatsucho, Shinjuku, Tokyo 162-8480, Japan
| | - Tatsuya Shimizu
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), 8-1 Kawadacho, Shinjuku,
Tokyo 162-8666, Japan
| | - Katsuhisa Matsuura
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), 8-1 Kawadacho, Shinjuku,
Tokyo 162-8666, Japan
| | - Masayuki Yamato
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), 8-1 Kawadacho, Shinjuku,
Tokyo 162-8666, Japan
| | - Naoya Takeda
- Department
of Life Science and Medical Bioscience, School of Advanced Science
and Engineering, Waseda University (TWIns), 2-2 Wakamatsucho, Shinjuku, Tokyo 162-8480, Japan
| | - Teruo Okano
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), 8-1 Kawadacho, Shinjuku,
Tokyo 162-8666, Japan
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99945
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Wan T, Xu M, Chen L, Wu D, Cheng W, Li R, Zou C. Synthesis and properties of a dual responsive hydrogel by inverse microemulsion polymerization. J CHEM SCI 2014; 126:1623-7. [DOI: 10.1007/s12039-014-0743-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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99946
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AGRAWAL SEEMA, NARULA ANUDEEPKUMAR. Facile synthesis of new thermally stable and organosoluble polyamide-imides based on non-coplaner phosphorus and silicon containing amines. J CHEM SCI 2015. [DOI: 10.1007/s12039-014-0727-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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99947
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Jiang Y, Freyer JL, Cotanda P, Brucks SD, Killops KL, Bandar JS, Torsitano C, Balsara NP, Lambert TH, Campos LM. The evolution of cyclopropenium ions into functional polyelectrolytes. Nat Commun 2015; 6:5950. [PMID: 25575214 PMCID: PMC4354017 DOI: 10.1038/ncomms6950] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 11/24/2014] [Indexed: 12/17/2022] Open
Abstract
Versatile polyelectrolytes with tunable physical properties have the potential to be transformative in applications such as energy storage, fuel cells and various electronic devices. Among the types of materials available for these applications, nanostructured cationic block copolyelectrolytes offer mechanical integrity and well-defined conducting paths for ionic transport. To date, most cationic polyelectrolytes bear charge formally localized on heteroatoms and lack broad modularity to tune their physical properties. To overcome these challenges, we describe herein the development of a new class of functional polyelectrolytes based on the aromatic cyclopropenium ion. We demonstrate the facile synthesis of a series of polymers and nanoparticles based on monomeric cyclopropenium building blocks incorporating various functional groups that affect physical properties. The materials exhibit high ionic conductivity and thermal stability due to the nature of the cationic moieties, thus rendering this class of new materials as an attractive alternative to develop ion-conducting membranes.
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Affiliation(s)
- Yivan Jiang
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - Jessica L. Freyer
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - Pepa Cotanda
- Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, USA
| | - Spencer D. Brucks
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - Kato L. Killops
- Edgewood Chemical Biological Center, Aberdeen Proving Ground, Aberdeen, Maryland 21010, USA
| | - Jeffrey S. Bandar
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | | | - Nitash P. Balsara
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, USA
- Materials Sciences Division, Environmental Energy Technologies Division and Joint Center for Energy Storage, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Tristan H. Lambert
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - Luis M. Campos
- Department of Chemistry, Columbia University, New York, New York 10027, USA
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99948
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Izadifar M, Haddadi A, Chen X, Kelly ME. Rate-programming of nano-particulate delivery systems for smart bioactive scaffolds in tissue engineering. Nanotechnology 2015; 26:012001. [PMID: 25474543 DOI: 10.1088/0957-4484/26/1/012001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Development of smart bioactive scaffolds is of importance in tissue engineering, where cell proliferation, differentiation and migration within scaffolds can be regulated by the interactions between cells and scaffold through the use of growth factors (GFs) and extra cellular matrix peptides. One challenge in this area is to spatiotemporally control the dose, sequence and profile of release of GFs so as to regulate cellular fates during tissue regeneration. This challenge would be addressed by rate-programming of nano-particulate delivery systems, where the release of GFs via polymeric nanoparticles is controlled by means of the methods of, such as externally-controlled and physicochemically/architecturally-modulated so as to mimic the profile of physiological GFs. Identifying and understanding such factors as the desired release profiles, mechanisms of release, physicochemical characteristics of polymeric nanoparticles, and externally-triggering stimuli are essential for designing and optimizing such delivery systems. This review surveys the recent studies on the desired release profiles of GFs in various tissue engineering applications, elucidates the major release mechanisms and critical factors affecting release profiles, and overviews the role played by the mathematical models for optimizing nano-particulate delivery systems. Potentials of stimuli responsive nanoparticles for spatiotemporal control of GF release are also presented, along with the recent advances in strategies for spatiotemporal control of GF delivery within tissue engineered scaffolds. The recommendation for the future studies to overcome challenges for developing sophisticated particulate delivery systems in tissue engineering is discussed prior to the presentation of conclusions drawn from this paper.
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Affiliation(s)
- Mohammad Izadifar
- Division of Biomedical Engineering, College of Engineering, 57 Campus Drive, University of Saskatchewan, Saskatoon, SK, S7N5A9, Canada
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99949
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Kyzas GZ, Bikiaris DN. Recent modifications of chitosan for adsorption applications: a critical and systematic review. Mar Drugs 2015; 13:312-37. [PMID: 25584681 PMCID: PMC4306939 DOI: 10.3390/md13010312] [Citation(s) in RCA: 220] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Accepted: 12/30/2014] [Indexed: 12/11/2022] Open
Abstract
Chitosan is considered to be one of the most promising and applicable materials in adsorption applications. The existence of amino and hydroxyl groups in its molecules contributes to many possible adsorption interactions between chitosan and pollutants (dyes, metals, ions, phenols, pharmaceuticals/drugs, pesticides, herbicides, etc.). These functional groups can help in establishing positions for modification. Based on the learning from previously published works in literature, researchers have achieved a modification of chitosan with a number of different functional groups. This work summarizes the published works of the last three years (2012-2014) regarding the modification reactions of chitosans (grafting, cross-linking, etc.) and their application to adsorption of different environmental pollutants (in liquid-phase).
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Affiliation(s)
- George Z Kyzas
- Laboratory of Polymer Chemistry and Technology, Division of Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
| | - Dimitrios N Bikiaris
- Laboratory of Polymer Chemistry and Technology, Division of Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
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99950
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Sivaram AJ, Rajitha P, Maya S, Jayakumar R, Sabitha M. Nanogels for delivery, imaging and therapy. Wiley Interdiscip Rev Nanomed Nanobiotechnol 2015; 7:509-33. [PMID: 25581024 DOI: 10.1002/wnan.1328] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 10/27/2014] [Accepted: 11/08/2014] [Indexed: 12/22/2022]
Abstract
Nanogels are hydrogels having size in nanoregime, which is composed of cross-linked polymer networks. The advantages of nanogels include stimuli-responsive nature, easy drug loading, and higher drug-loading capacity, physical stability, versatility in design, stability of entrapped drug, and controlled release of the anti-inflammatory, antimicrobial, protein, peptide and anticancer drugs. Stimuli-responsive nature of nanogel is of particular importance in anticancer and anti-inflammatory drug delivery, as cancer and inflammation are associated with acidic pH, heat generation, and change in ionic content. Nanogels composed of muco-adhesive polymers provide prolonged residence time and increase the ocular availability of loaded drugs. By forming suitably sized complex with proteins or by acting as artificial chaperones, they thus help to keep the proteins and enzymes in proper confirmation necessary for exerting biological activity; nanogels can increase the stability and activity of protein/peptide drugs. Better drug penetrations achieved by prolonged contact with skin contribute much in transdermal drug delivery. When it comes to cancer drug delivery, the presence of multiple interactive functional groups in nanogels different targeting agents can be conjugated for delivery of the selective drugs. This review focuses on applications of nanogels in cancer drug delivery and imaging, anti-inflammatory, anti-psoriatic, transdermal, ocular and protein/peptide drug delivery and therapy.
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Affiliation(s)
- Amal J Sivaram
- Amrita Centre for Nanosciences and Molecular Medicine, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham University, Kochi, India
| | - P Rajitha
- Amrita School of Pharmacy, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham University, Kochi, India
| | - S Maya
- Amrita Centre for Nanosciences and Molecular Medicine, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham University, Kochi, India
| | - R Jayakumar
- Amrita Centre for Nanosciences and Molecular Medicine, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham University, Kochi, India
| | - M Sabitha
- Amrita School of Pharmacy, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham University, Kochi, India
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