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Manna S, Karmakar S, Sen O, Sinha P, Jana S, Jana S. Recent updates on guar gum derivatives in colon specific drug delivery. Carbohydr Polym 2024; 334:122009. [PMID: 38553200 DOI: 10.1016/j.carbpol.2024.122009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 04/02/2024]
Abstract
Colon specific delivery of therapeutics have gained much attention of pharmaceutical researchers in the recent past. Colonic specific targeting of drugs is used not only for facilitating absorption of protein or peptide drugs, but also localization of therapeutic agents in colon to treat several colonic disorders. Among various biopolymers, guar gum (GG) exhibits pH dependent swelling, which allows colon specific release of drug. GG also shows microbial degradation in the colonic environment which makes it a suitable excipient for developing colon specific drug delivery systems. The uncontrolled swelling and hydration of GG can be controlled by structural modification or by grafting with another polymeric moiety. Several graft copolymerized guar gum derivatives are investigated for colon targeting of drugs. The efficacy of various guar gum derivatives are evaluated for colon specific delivery of drugs. The reviewed literature evidenced the potentiality of guar gum in localizing drugs in the colonic environment. This review focuses on the synthesis of several guar gum derivatives and their application in developing various colon specific drug delivery systems including matrix tablets, coated formulations, nano or microparticulate delivery systems and hydrogels.
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Affiliation(s)
- Sreejan Manna
- Department of Pharmaceutical Technology, Brainware University, Barasat, Kolkata, West Bengal 700125, India
| | - Sandip Karmakar
- Department of Pharmacy, Sanaka Educational Trust's Group of Institutions, Durgapur, West Bengal 713212, India
| | - Olivia Sen
- Department of Pharmaceutical Technology, Brainware University, Barasat, Kolkata, West Bengal 700125, India
| | - Puspita Sinha
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak, Madhya Pradesh 484887, India
| | - Subrata Jana
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak, Madhya Pradesh 484887, India
| | - Sougata Jana
- Department of Health and Family Welfare, Directorate of Health Services, Kolkata-700091, West Bengal, India.
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2
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Rashid H, Lucas H, Busse K, Kressler J, Mäder K, Trutschel ML. Development of Poly(sorbitol adipate)- g-poly(ethylene glycol) Mono Methyl Ether-Based Hydrogel Matrices for Model Drug Release. Gels 2023; 10:17. [PMID: 38247740 PMCID: PMC10815636 DOI: 10.3390/gels10010017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 12/19/2023] [Accepted: 12/19/2023] [Indexed: 01/23/2024] Open
Abstract
Hydrogels were prepared by Steglich esterification and by crosslinking pre-synthesized poly(sorbitol adipate)-graft-poly(ethylene glycol) mono methyl ether (PSA-g-mPEG) using different-chain-length-based disuccinyl PEG. PSA and PSA-g-mPEG were investigated for polymer degradation as a function of time at different temperatures. PSA-g-mPEG hydrogels were then evaluated for their most crucial properties of swelling that rendered them suitable for many pharmaceutical and biomedical applications. Hydrogels were also examined for their Sol-Gel content in order to investigate the degree of cross-linking. Physical structural parameters of the hydrogels were theoretically estimated using the modified Flory-Rehner theory to obtain approximate values of polymer volume fraction, the molecular weight between two crosslinks, and the mesh size of the hydrogels. X-ray diffraction was conducted to detect the presence or absence of crystalline regions in the hydrogels. PSA-g-mPEG hydrogels were then extensively examined for higher and lower molecular weight solute release through analysis by fluorescence spectroscopy. Finally, the cytotoxicity of the hydrogels was also investigated using a resazurin reduction assay. Experimental results show that PSA-g-mPEG provides an option as a biocompatible polymer to be used for pharmaceutical applications.
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Affiliation(s)
- Haroon Rashid
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Henrike Lucas
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Karsten Busse
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Jörg Kressler
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Karsten Mäder
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Marie-Luise Trutschel
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
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Habanjar O, Diab-Assaf M, Caldefie-Chezet F, Delort L. 3D Cell Culture Systems: Tumor Application, Advantages, and Disadvantages. Int J Mol Sci 2021; 22:12200. [PMID: 34830082 PMCID: PMC8618305 DOI: 10.3390/ijms222212200] [Citation(s) in RCA: 154] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/05/2021] [Accepted: 11/07/2021] [Indexed: 01/09/2023] Open
Abstract
The traditional two-dimensional (2D) in vitro cell culture system (on a flat support) has long been used in cancer research. However, this system cannot be fully translated into clinical trials to ideally represent physiological conditions. This culture cannot mimic the natural tumor microenvironment due to the lack of cellular communication (cell-cell) and interaction (cell-cell and cell-matrix). To overcome these limitations, three-dimensional (3D) culture systems are increasingly developed in research and have become essential for tumor research, tissue engineering, and basic biology research. 3D culture has received much attention in the field of biomedicine due to its ability to mimic tissue structure and function. The 3D matrix presents a highly dynamic framework where its components are deposited, degraded, or modified to delineate functions and provide a platform where cells attach to perform their specific functions, including adhesion, proliferation, communication, and apoptosis. So far, various types of models belong to this culture: either the culture based on natural or synthetic adherent matrices used to design 3D scaffolds as biomaterials to form a 3D matrix or based on non-adherent and/or matrix-free matrices to form the spheroids. In this review, we first summarize a comparison between 2D and 3D cultures. Then, we focus on the different components of the natural extracellular matrix that can be used as supports in 3D culture. Then we detail different types of natural supports such as matrigel, hydrogels, hard supports, and different synthetic strategies of 3D matrices such as lyophilization, electrospiding, stereolithography, microfluid by citing the advantages and disadvantages of each of them. Finally, we summarize the different methods of generating normal and tumor spheroids, citing their respective advantages and disadvantages in order to obtain an ideal 3D model (matrix) that retains the following characteristics: better biocompatibility, good mechanical properties corresponding to the tumor tissue, degradability, controllable microstructure and chemical components like the tumor tissue, favorable nutrient exchange and easy separation of the cells from the matrix.
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Affiliation(s)
- Ola Habanjar
- Université Clermont-Auvergne, INRAE, UNH, Unité de Nutrition Humaine, CRNH-Auvergne, 63000 Clermont-Ferrand, France; (O.H.); (F.C.-C.)
| | - Mona Diab-Assaf
- Equipe Tumorigénèse Pharmacologie Moléculaire et Anticancéreuse, Faculté des Sciences II, Université Libanaise Fanar, Beyrouth 1500, Liban;
| | - Florence Caldefie-Chezet
- Université Clermont-Auvergne, INRAE, UNH, Unité de Nutrition Humaine, CRNH-Auvergne, 63000 Clermont-Ferrand, France; (O.H.); (F.C.-C.)
| | - Laetitia Delort
- Université Clermont-Auvergne, INRAE, UNH, Unité de Nutrition Humaine, CRNH-Auvergne, 63000 Clermont-Ferrand, France; (O.H.); (F.C.-C.)
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Bami MS, Raeisi Estabragh MA, Khazaeli P, Ohadi M, Dehghannoudeh G. pH-responsive drug delivery systems as intelligent carriers for targeted drug therapy: Brief history, properties, synthesis, mechanism and application. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102987] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Samiei M, Fathi M, Barar J, Fathi N, Amiryaghoubi N, Omidi Y. Bioactive hydrogel-based scaffolds for the regeneration of dental pulp tissue. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Okada S, Sato E. Thermo- and Photoresponsive Behaviors of Dual-Stimuli-Responsive Organogels Consisting of Homopolymers of Coumarin-Containing Methacrylate. Polymers (Basel) 2021; 13:polym13030329. [PMID: 33494152 PMCID: PMC7864332 DOI: 10.3390/polym13030329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 01/15/2021] [Accepted: 01/18/2021] [Indexed: 11/16/2022] Open
Abstract
Coumarin-containing vinyl homopolymers, such as poly(7-methacryloyloxycoumarin) (P1a) and poly(7-(2'-methacryloyloxyethoxy)coumarin) (P1b), show a lower critical solution temperature (LCST) in chloroform, which can be controlled by the [2 + 2] photochemical cycloaddition of the coumarin moiety, and they are recognized as monofunctional dual-stimuli-responsive polymers. A single functional group of monofunctional dual-stimuli-responsive polymers responds to dual stimuli and can be introduced more uniformly and densely than those of dual-functional dual-stimuli-responsive polymers. In this study, considering a wide range of applications, organogels consisting of P1a and P1b, i.e., P1a-gel and P1b-gel, respectively, were synthesized, and their thermo- and photoresponsive behaviors in chloroform were investigated in detail. P1a-gel and P1b-gel in a swollen state (transparent) exhibited phase separation (turbid) through a temperature jump and reached a shrunken state (transparent), i.e., an equilibrium state, over time. Moreover, the equilibrium degree of swelling decreased non-linearly with increasing temperature. Furthermore, different thermoresponsive sites were photopatterned on the organogel through the photodimerization of the coumarin unit. The organogels consisting of homopolymers of coumarin-containing methacrylate exhibited unique thermo- and photoresponsivities and behaved as monofunctional dual-stimuli-responsive organogels.
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Affiliation(s)
| | - Eriko Sato
- Correspondence: ; Tel./Fax: +81-6-6605-2982
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Mude L, Sanapalli BKR, V AN, Singh SK, Karri VVSR. Overview of in situ gelling injectable hydrogels for diabetic wounds. Drug Dev Res 2021; 82:503-522. [PMID: 33432634 DOI: 10.1002/ddr.21788] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 12/15/2020] [Accepted: 12/24/2020] [Indexed: 01/01/2023]
Abstract
Diabetes mellitus (DM) is an endocrine disorder that causes increased blood glucose than usual due to insulin impairment. In DM, several complications arise in which diabetic wound (DW) is the most devastating complication. About 25% of patients with DM expected to develop DWs in their lifetime and undergo limb amputations. Even though several treatments such as surgery, debridement, wound dressings, advanced therapies were available, the overall conclusion has been that with very few exceptions, patients still suffer from limitations like pain, frequent dress changing, high rates of failure, and cost involvement. Further, the treatments involving the delivery of therapeutic agents in treating DWs have limited success due to abnormal levels of proteases in the DW environment. In this backdrop, in situ gelling injectable hydrogels have gained special attention due to their easy encapsulation of therapeutic medications and prolonged release, filling the wound defect areas, ease of handling, and minimally invasive surgical procedures. Though the in situ gelling injectable hydrogels are developed a couple of decades ago, their use for treating DW has not yet been explored thoroughly. Thus, in this review, we have covered the sequential events of DW healing, pathophysiology, current treatments, and its limitations, along with a particular emphasis on the mechanism of action of these in situ gelling injectable hydrogels treating DWs.
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Affiliation(s)
- Lavanya Mude
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty, Nilgiris, Tamil Nadu, India
| | - Bharat Kumar Reddy Sanapalli
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty, Nilgiris, Tamil Nadu, India
| | - Anoop Narayanan V
- Department of Pharmaceutics, NGSM Institute of Pharmaceutical Sciences, NITTE Deemed to be University, Paneer, Deralakatte, Mangalore, Karnataka, India
| | - Sachin Kumar Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India
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Chitosan based thermosensitive injectable hydrogels for controlled delivery of loxoprofen: development, characterization and in-vivo evaluation. Int J Biol Macromol 2019; 129:233-245. [DOI: 10.1016/j.ijbiomac.2019.02.031] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/05/2019] [Accepted: 02/05/2019] [Indexed: 12/14/2022]
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9
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Rasool A, Ata S, Islam A. Stimuli responsive biopolymer (chitosan) based blend hydrogels for wound healing application. Carbohydr Polym 2018; 203:423-429. [PMID: 30318231 DOI: 10.1016/j.carbpol.2018.09.083] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 09/13/2018] [Accepted: 09/29/2018] [Indexed: 12/18/2022]
Abstract
Stimuli responsive chitosan (CS) and poly (N-vinyl-2-pyrrolidone) (PVP) have attained hydrogel properties in the presence of 74% neutralized poly acrylic acid (PAA) which can be exploited for wound healing applications. The FTIR spectra confirmed the presence of all specific functional groups and the developed interactions in the hydrogels. The thermal analysis explained that the hydrogel samples are thermally more stable than individual chitosan and PVP. The antimicrobial analysis revealed that all the samples show antibacterial activity against E. coli and the biodegradation analysis is performed to confirm the hydrogels degradation. The hydrogels showed enhanced responsive swelling behavior against different media depending upon the amount of PVP. The %age swelling in water is decreased with the increase in the amount of PVP. The most considerable swelling behavior is observed against pH, as they manifested low swelling at acidic pH and high swelling at neutral pH while at pH 8, the prominent values are obtained. This distinctive behavior of hydrogels and their biocompatibility made them pertinent to drug delivery and their release profile is examined spectrophotometrically using silver sulfadiazine (antibiotic for burnt wounds) showed 91.2% of drug release for a period of 1 h in phosphate buffer saline (PBS) in a consistent and controlled manner.
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Affiliation(s)
- Atta Rasool
- Institute of Chemistry, University of the Punjab, Lahore, Pakistan; Department of Polymer Engineering and Technology, University of the Punjab, Lahore, Pakistan
| | - Sadia Ata
- Institute of Chemistry, University of the Punjab, Lahore, Pakistan.
| | - Atif Islam
- Department of Polymer Engineering and Technology, University of the Punjab, Lahore, Pakistan.
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10
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Komez A, Buyuksungur S, Hasirci V, Hasirci N. Effect of chemical structure on properties of polyurethanes: Temperature responsiveness and biocompatibility. J BIOACT COMPAT POL 2018. [DOI: 10.1177/0883911518783233] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Polyurethanes are known as one of the most biocompatible and inherently blood-compatible materials and have a wide range of applications in the medical field due to their controllable structure and properties. Durability, elasticity, elastomeric structure, fatigue resistance, versatility, and easy acceptance by the biological media after the application makes these polymers preferable in medical area. In this study, polyurethane films were prepared using poly(propylene-ethylene glycol) and either toluene-2,4-diisocyanate or 4,4′-methylenediphenyl diisocyanate without adding any other ingredients such as solvent, catalyst, or chain extender to prevent negative effects of leachable molecules. Mechanical tests were performed at room temperature while swelling tests were conducted in water and phosphate-buffered saline at 4°C, 25°C, and 37°C. Temperature responsiveness was observed for the samples synthesized using toluene-2,4-diisocyanate and poly(propylene-ethylene glycol). These samples had more than 100% swelling at 4°C and about 4% swelling at 25°C and 37°C. Cytocompatibility tests were performed by culturing the samples and their extracts with mouse fibroblast cells (L929). Viability of human umbilical vein endothelial cells was studied to examine the compatibility of the films for blood contacting devices. Both toluene-2,4-diisocyanate and 4,4-methylenediphenyl diisocyanate–based polyurethane films showed no cytotoxic effect and good biocompatibility. Oxygen plasma treatment enhanced hydrophilicity of the films. After plasma treatment, human umbilical vein endothelial cell attachment on toluene-2,4-diisocyanate–based polyurethane films improved and 4,4-methylenediphenyl diisocyanate–based polyurethane films maintained their high cell affinity. Polyurethanes presenting temperature responsiveness, high biocompatibility, and high affinity for human umbilical vein endothelial cells were synthesized in medical purity and in a reaction media involving only diisocyanate and diol components without addition of any solvent, chain extender, or catalyst. Polyurethanes with these properties and as produced in this study are reported for the first time in the literature.
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Affiliation(s)
- Aylin Komez
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University (METU), Ankara, Turkey
- Graduate Department of Biotechnology, Middle East Technical University (METU), Ankara, Turkey
| | - Senem Buyuksungur
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University (METU), Ankara, Turkey
- Graduate Department of Biotechnology, Middle East Technical University (METU), Ankara, Turkey
| | - Vasif Hasirci
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University (METU), Ankara, Turkey
- Graduate Department of Biotechnology, Middle East Technical University (METU), Ankara, Turkey
- Department of Biological Sciences, Middle East Technical University (METU), Ankara, Turkey
| | - Nesrin Hasirci
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University (METU), Ankara, Turkey
- Graduate Department of Biotechnology, Middle East Technical University (METU), Ankara, Turkey
- Department of Chemistry, Middle East Technical University (METU), Ankara, Turkey
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Mandl GA, Rojas-Gutierrez PA, Capobianco JA. A NIR-responsive azobenzene-based supramolecular hydrogel using upconverting nanoparticles. Chem Commun (Camb) 2018; 54:5847-5850. [PMID: 29726556 DOI: 10.1039/c8cc03101k] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
To circumvent the need for direct UV excitation in a supramolecular hydrogel composed of an azobenzene-modified poly(acrylic acid) copolymer and deoxycholate-β-cyclodextrin as a crosslinker, we modified this system for use with LiYF4:Tm3+/Yb3+ upconverting nanoparticles, which emit UV light upon NIR excitation. A complete gel-sol transition was observed in 60 minutes upon 980 nm irradiation. No change was observed under similar conditions of a control sample over the same period of time.
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Affiliation(s)
- Gabrielle A Mandl
- Department of Chemistry and Biochemistry and Centre for NanoScience Research Concordia University, 7141 Sherbrooke St. West Montreal, Quebec H4B 1R6, Canada.
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Vieira VMP, Hay LL, Smith DK. Multi-component hybrid hydrogels - understanding the extent of orthogonal assembly and its impact on controlled release. Chem Sci 2017; 8:6981-6990. [PMID: 29147525 PMCID: PMC5642149 DOI: 10.1039/c7sc03301j] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 08/18/2017] [Indexed: 12/20/2022] Open
Abstract
This paper reports self-assembled multi-component hybrid hydrogels including a range of nanoscale systems and characterizes the extent to which each component maintains its own unique functionality, demonstrating that multi-functionality can be achieved by simply mixing carefully-chosen constituents. Specifically, the individual components are: (i) pH-activated low-molecular-weight gelator (LMWG) 1,3;2,4-dibenzylidenesorbitol-4',4''-dicarboxylic acid (DBS-COOH), (ii) thermally-activated polymer gelator (PG) agarose, (iii) anionic biopolymer heparin, and (iv) cationic self-assembled multivalent (SAMul) micelles capable of binding heparin. The LMWG still self-assembles in the presence of PG agarose, is slightly modified on the nanoscale by heparin, but is totally disrupted by the micelles. However, if the SAMul micelles are bound to heparin, DBS-COOH self-assembly is largely unaffected. The LMWG endows hybrid materials with pH-responsive behavior, while the PG provides mechanical robustness. The rate of heparin release can be controlled through network density and composition, with the LMWG and PG behaving differently in this regard, while the presence of the heparin binder completely inhibits heparin release through complexation. This study demonstrates that a multi-component approach can yield exquisite control over self-assembled materials. We reason that controlling orthogonality in such systems will underpin further development of controlled release systems with biomedical applications.
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Affiliation(s)
- Vânia M P Vieira
- Department of Chemistry , University of York , Heslington , York , YO10 5DD , UK . ; http://www.york.ac.uk/chemistry/staff/academic/o-s/dsmith/
| | - Laura L Hay
- Department of Chemistry , University of York , Heslington , York , YO10 5DD , UK . ; http://www.york.ac.uk/chemistry/staff/academic/o-s/dsmith/
| | - David K Smith
- Department of Chemistry , University of York , Heslington , York , YO10 5DD , UK . ; http://www.york.ac.uk/chemistry/staff/academic/o-s/dsmith/
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Yi P, Wang Y, He P, Zhan Y, Sun Z, Li Y, Zhang Y. Study on β-cyclodextrin-complexed nanogels with improved thermal response for anticancer drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 78:773-779. [DOI: 10.1016/j.msec.2017.04.096] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 04/14/2017] [Accepted: 04/16/2017] [Indexed: 02/03/2023]
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Dadoo N, Landry SB, Bomar JD, Gramlich WM. Synthesis and Spatiotemporal Modification of Biocompatible and Stimuli-Responsive Carboxymethyl Cellulose Hydrogels Using Thiol-Norbornene Chemistry. Macromol Biosci 2017; 17. [DOI: 10.1002/mabi.201700107] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 05/16/2017] [Indexed: 12/17/2022]
Affiliation(s)
- Nayereh Dadoo
- Department of Chemistry; University of Maine; 5706 Aubert Hall Room 154 Orono ME 04469-5706 USA
| | - Samuel B. Landry
- Department of Chemical and Biological Engineering; University of Maine; 5737 Jenness Hall Room 117 Orono ME 04469-5737 USA
| | - Jonathan D. Bomar
- Graduate School of Biomedical Science and Engineering; University of Maine; Orono ME 04469 USA
| | - William M. Gramlich
- Department of Chemistry; University of Maine; 5706 Aubert Hall Room 154 Orono ME 04469-5706 USA
- Graduate School of Biomedical Science and Engineering; University of Maine; Orono ME 04469 USA
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Rizwan M, Yahya R, Hassan A, Yar M, Azzahari AD, Selvanathan V, Sonsudin F, Abouloula CN. pH Sensitive Hydrogels in Drug Delivery: Brief History, Properties, Swelling, and Release Mechanism, Material Selection and Applications. Polymers (Basel) 2017; 9:E137. [PMID: 30970818 PMCID: PMC6432076 DOI: 10.3390/polym9040137] [Citation(s) in RCA: 316] [Impact Index Per Article: 45.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 04/06/2017] [Accepted: 04/06/2017] [Indexed: 01/01/2023] Open
Abstract
Improving the safety efficacy ratio of existing drugs is a current challenge to be addressed rather than the development of novel drugs which involve much expense and time. The efficacy of drugs is affected by a number of factors such as their low aqueous solubility, unequal absorption along the gastrointestinal (GI) tract, risk of degradation in the acidic milieu of the stomach, low permeation of the drugs in the upper GI tract, systematic side effects, etc. This review aims to enlighten readers on the role of pH sensitive hydrogels in drug delivery, their mechanism of action, swelling, and drug release as a function of pH change along the GI tract. The basis for the selection of materials, their structural features, physical and chemical properties, the presence of ionic pendant groups, and the influence of their pKa and pKb values on the ionization, consequent swelling, and targeted drug release are also highlighted.
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Affiliation(s)
- Muhammad Rizwan
- Department of Chemistry, Universiti Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Rosiyah Yahya
- Department of Chemistry, Universiti Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Aziz Hassan
- Department of Chemistry, Universiti Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Muhammad Yar
- Interdisciplinary Research Center in Biomedical Materials, COMSATS Institute of Information Technology, 54000 Lahore, Pakistan.
| | | | - Vidhya Selvanathan
- Department of Chemistry, Universiti Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Faridah Sonsudin
- Centre for Foundation Studies in Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Cheyma Naceur Abouloula
- Department of Physics, Faculty of Science Semlalia Marrakesh, Cadi Ayyad University, 40000 Marrakesh, Morocco.
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Yin A, Luo R, Li J, Mo X, Wang Y, Zhang X. Coaxial electrospinning multicomponent functional controlled-release vascular graft: Optimization of graft properties. Colloids Surf B Biointerfaces 2017; 152:432-439. [DOI: 10.1016/j.colsurfb.2017.01.045] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 01/20/2017] [Accepted: 01/24/2017] [Indexed: 11/29/2022]
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Tang S, Bhandari R, Delaney SP, Munson EJ, Dziubla TD, Hilt JZ. Synthesis and characterization of thermally responsive N-isopropylacrylamide hydrogels copolymerized with novel hydrophobic polyphenolic crosslinkers. MATERIALS TODAY. COMMUNICATIONS 2017; 10:46-53. [PMID: 28989952 PMCID: PMC5628756 DOI: 10.1016/j.mtcomm.2016.12.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Two series of thermosensitive hydrogels were synthesized by copolymerizing N-isopropylacrylamide (NIPAAm) with various contents of novel hydrophobic crosslinkers, curcumin multiacrylate (CMA) and quercetin multiacrylate (QMA). The compositions of the resulting hydrogels were characterized using solid state-NMR (ss-NMR), and the temperature dependent swelling behavior and lower critical solution temperature (LCST) were characterized using swelling studies and differential scanning calorimetry (DSC). Increasing the crosslinker content resulted in a significant decrease in the LCST and swelling ratio of hydrogels, which could be attributed to the increased hydrophobicity introduced by CMA or QMA. All of the hydrogels demonstrated temperature responsive swelling with the extent of swelling decreasing with increasing crosslinker content. The lower crosslinker content gels displayed sharper phase transitions, while the high crosslinker content gels had broader phase transitions.
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Affiliation(s)
- Shuo Tang
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Rohit Bhandari
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Sean P Delaney
- Department of Pharmaceutical Sciences, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Eric J Munson
- Department of Pharmaceutical Sciences, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Thomas D Dziubla
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
| | - J Zach Hilt
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
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18
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Taktak F, Alnıaçik T. Rapid Deswelling of Porous Poly[2-(N-morpholino)ethyl methacrylate] Hydrogel and Controlled Release of Ibuprofen. J MACROMOL SCI B 2016. [DOI: 10.1080/00222348.2017.1274098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Fulya Taktak
- Department of Chemical Engineering, Uşak University, Uşak, Turkey
- Department of Polymer Science and Technology, Uşak University, Uşak, Turkey
| | - Talip Alnıaçik
- Department of Polymer Science and Technology, Uşak University, Uşak, Turkey
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19
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Giammona G, Pitarresi G, Carlisi B, Cavallaro G. Crosslinked α,β-Polyasparthydrazide Micromatrices for Controlled Release of Anticancer Drugs. J BIOACT COMPAT POL 2016. [DOI: 10.1177/088391159501000104] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The preparation of new hydrogels by the reaction of α,β- polyasparthydrazide and glutaraldehyde is reported. A different crosslinking degree was obtained by varying the ratio crosslinking agent/polymer which influenced the swelling behavior of the gel. 5-Fluorouracil, was incorporated into the matrices during the crosslinking reaction and in vitro release studies were performed in simulated gastric juice (pH 1.1) and pH 7.4 buffer solution. The hydrogels prepared were chemically stable in the dissolution media. The observed data show the potential application of these new matrices for peroral administration of anticancer agents.
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Affiliation(s)
- Gaetano Giammona
- Dipartimento di Chimica e Tecnologie Farmaceutiche, Università di Palermo, Via Archirafi 32-90123-Palermo (Italy)
| | - Giovanna Pitarresi
- Dipartimento di Chimica e Tecnologie Farmaceutiche, Università di Palermo, Via Archirafi 32-90123-Palermo (Italy)
| | - Bianca Carlisi
- Dipartimento di Chimica e Tecnologie Farmaceutiche, Università di Palermo, Via Archirafi 32-90123-Palermo (Italy)
| | - Gennara Cavallaro
- Dipartimento di Chimica e Tecnologie Farmaceutiche, Università di Palermo, Via Archirafi 32-90123-Palermo (Italy)
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20
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Monnier A, Rombouts C, Kouider D, About I, Fessi H, Sheibat-Othman N. Preparation and characterization of biodegradable polyhydroxybutyrate-co-hydroxyvalerate/polyethylene glycol-based microspheres. Int J Pharm 2016; 513:49-61. [PMID: 27593898 DOI: 10.1016/j.ijpharm.2016.08.066] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 08/30/2016] [Accepted: 08/31/2016] [Indexed: 01/25/2023]
Abstract
The in vivo effectiveness of biomolecules may be limited by their rapid diffusion in the body and short half-life time. Encapsulation of these biomolecules allows protecting them against degradation and ensuring a controlled release over time. In this work, the production of polyhydroxybutyrate-co-hydroxyvalerate/polyethylene glycol-based microspheres loaded with heparin by double emulsion-solvent evaporation is investigated. Significant improvements are achieved after blending PHB-HV microspheres with PEG. First of all, an important decrease of the initial burst effect is ensured. Moreover, lower degradation of the microspheres is observed after 30days in the release medium. Finally, the release rate could be controlled using different PEG molecular weights and concentrations. A toxic effect of PHB-HV 30% PEG 1100gmol-1 microspheres is observed whereas PHB-HV and PHB-HV 30% PEG 10,000gmol-1 microspheres are not toxic. These microspheres seem to be most suited for further tissue engineering applications. The effectiveness of direct PEG blending to PHB-HV is proved, limiting the use of chemical reagents for PHB-HV/PEG copolymer synthesis and steps for chemical reagents removal from the copolymer.
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Affiliation(s)
- Alexandre Monnier
- Université de Lyon, Univ. Lyon 1, CNRS, CPE, UMR 5007, Laboratoire d'Automatisme et de Génie des procédés (LAGEP), 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
| | | | - Dania Kouider
- Université de Lyon, Univ. Lyon 1, CNRS, CPE, UMR 5007, Laboratoire d'Automatisme et de Génie des procédés (LAGEP), 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Imad About
- Aix Marseille Université, CNRS, ISM UMR 7287, Marseille, France
| | - Hatem Fessi
- Université de Lyon, Univ. Lyon 1, CNRS, CPE, UMR 5007, Laboratoire d'Automatisme et de Génie des procédés (LAGEP), 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Nida Sheibat-Othman
- Université de Lyon, Univ. Lyon 1, CNRS, CPE, UMR 5007, Laboratoire d'Automatisme et de Génie des procédés (LAGEP), 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France.
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21
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Wo Y, Brisbois EJ, Bartlett RH, Meyerhoff ME. Recent advances in thromboresistant and antimicrobial polymers for biomedical applications: just say yes to nitric oxide (NO). Biomater Sci 2016; 4:1161-83. [PMID: 27226170 PMCID: PMC4955746 DOI: 10.1039/c6bm00271d] [Citation(s) in RCA: 170] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Biomedical devices are essential for patient diagnosis and treatment; however, when blood comes in contact with foreign surfaces or homeostasis is disrupted, complications including thrombus formation and bacterial infections can interrupt device functionality, causing false readings and/or shorten device lifetime. Here, we review some of the current approaches for developing antithrombotic and antibacterial materials for biomedical applications. Special emphasis is given to materials that release or generate low levels of nitric oxide (NO). Nitric oxide is an endogenous gas molecule that can inhibit platelet activation as well as bacterial proliferation and adhesion. Various NO delivery vehicles have been developed to improve NO's therapeutic potential. In this review, we provide a summary of the NO releasing and NO generating polymeric materials developed to date, with a focus on the chemistry of different NO donors, the polymer preparation processes, and in vitro and in vivo applications of the two most promising types of NO donors studied thus far, N-diazeniumdiolates (NONOates) and S-nitrosothiols (RSNOs).
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Affiliation(s)
- Yaqi Wo
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA.
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22
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Dadoo N, Gramlich WM. Spatiotemporal Modification of Stimuli-Responsive Hyaluronic Acid/Poly(N-isopropylacrylamide) Hydrogels. ACS Biomater Sci Eng 2016; 2:1341-1350. [DOI: 10.1021/acsbiomaterials.6b00259] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Nayereh Dadoo
- Department of Chemistry, 5706 Aubert Hall,
Room 154, University of Maine, Orono, Maine 04469-5706, United States
| | - William M. Gramlich
- Department of Chemistry, 5706 Aubert Hall,
Room 154, University of Maine, Orono, Maine 04469-5706, United States
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23
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Marchioli G, Luca AD, de Koning E, Engelse M, Van Blitterswijk CA, Karperien M, Van Apeldoorn AA, Moroni L. Hybrid Polycaprolactone/Alginate Scaffolds Functionalized with VEGF to Promote de Novo Vessel Formation for the Transplantation of Islets of Langerhans. Adv Healthc Mater 2016; 5:1606-16. [PMID: 27113576 DOI: 10.1002/adhm.201600058] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 03/16/2016] [Indexed: 12/26/2022]
Abstract
Although regarded as a promising treatment for type 1 diabetes, clinical islet transplantation in the portal vein is still hindered by a low transplantation outcome. Alternative transplantation sites have been proposed, but the survival of extra-hepatically transplanted islets of Langerhans critically depends on quick revascularization after engraftment. This study aims at developing a new 3D scaffold platform that can actively boost vascularization and may find an application for extra-hepatic islet transplantation. The construct consists of a 3D ring-shaped polycaprolactone (PCL) scaffold with heparinized surface to electrostatically bind vascular endothelial growth factor (VEGF), surrounding a hydrogel core for islets encapsulation. Heparin immobilization improves the amount of VEGF retained by the construct, up to 3.6 fold, compared to untreated PCL scaffolds. In a chicken chorioallanthoic membrane model, VEGF immobilized on the construct enhances angiogenesis in close proximity and on the surface of the scaffolds. After 7 days, islets encapsulated in the alginate core show functional response to glucose stimuli comparable to free-floating islets. Thus, the developed platform has the potential to support rapid vascularization and islet endocrine function.
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Affiliation(s)
- Giulia Marchioli
- Department of Developmental BioEngineering; MIRA Institute for Biomedical Technology and Technical Medicine; Faculty of Science and Technology; University of Twente; Drienerlolaan 5 7522 NB Enschede The Netherlands
| | - Andrea Di Luca
- Department of Tissue Regeneration; MIRA Institute for Biomedical Technology and Technical Medicine; Faculty of Science and Technology; University of Twente; Drienerlolaan 5 7522 NB Enschede The Netherlands
| | - Eelco de Koning
- Department of Nephrology and Department of Endocrinology; Leiden University Medical Center; Albinusdreef 2 2333 ZA Leiden The Netherlands
| | - Marten Engelse
- Department of Nephrology and Department of Endocrinology; Leiden University Medical Center; Albinusdreef 2 2333 ZA Leiden The Netherlands
| | - Clemens A. Van Blitterswijk
- Department of Tissue Regeneration; MIRA Institute for Biomedical Technology and Technical Medicine; Faculty of Science and Technology; University of Twente; Drienerlolaan 5 7522 NB Enschede The Netherlands
- Department of Complex Tissue Regeneration; MERLN Institute for Technology Inspired Regenerative Medicine; Maastricht University; Universiteitssingel 40 6229 ER Maastricht The Netherlands
| | - Marcel Karperien
- Department of Developmental BioEngineering; MIRA Institute for Biomedical Technology and Technical Medicine; Faculty of Science and Technology; University of Twente; Drienerlolaan 5 7522 NB Enschede The Netherlands
| | - Aart A. Van Apeldoorn
- Department of Developmental BioEngineering; MIRA Institute for Biomedical Technology and Technical Medicine; Faculty of Science and Technology; University of Twente; Drienerlolaan 5 7522 NB Enschede The Netherlands
| | - Lorenzo Moroni
- Department of Tissue Regeneration; MIRA Institute for Biomedical Technology and Technical Medicine; Faculty of Science and Technology; University of Twente; Drienerlolaan 5 7522 NB Enschede The Netherlands
- Department of Complex Tissue Regeneration; MERLN Institute for Technology Inspired Regenerative Medicine; Maastricht University; Universiteitssingel 40 6229 ER Maastricht The Netherlands
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24
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Yu R, Zheng S. Poly(acrylic acid)-grafted poly(N-isopropyl acrylamide) networks: preparation, characterization and hydrogel behavior. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2016; 22:2305-24. [PMID: 21092421 DOI: 10.1163/092050610x538722] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Poly(acrylic acid)-grafted poly(N-isopropylacrylamide) co-polymer networks (PNIPAAm-g-PAA) were prepared via the reversible addition-fragmentation transfer (RAFT) polymerization of N-isopropyl- acrylamide (NIPAAm) with trithiocarbonate-terminated PAA as a macromolecular chain-transfer agent in the presence of N,N-methylenebisacrylamide. The PNIPAAm-g-PAA co-polymer networks were characterized by means of Fourier transform infrared spectroscopy, differential scanning calorimetry and small-angle X-ray scattering. It is found that the PNIPAAm-g-PAA co-polymer networks were microphase-separated, in which the microdomains of PNIPAAm-PAA interpolymer complexes were dispersed into the PNIPAAm matrix. The PNIPAAm-g-PAA hydrogels displayed a dual response to temperature and pH values. The thermoresponsive properties of PNIPAAm-g-PAA networks were investigated. Below the volume phase transition temperatures, the PNIPAAm-g-PAA hydrogels possessed much higher swelling ratios than control PNIPAAm hydrogel. In terms of swelling, deswelling and reswelling tests, it is judged that the PNIPAAm-g-PAA hydrogels displayed faster response to the external temperature changes than control PNIPAAm hydrogel. The improved thermoresponsive properties of hydrogels are ascribed to the formation of PAA-grafted PNIPAAm networks, in which the water-soluble PAA chains behave as the hydrophiphilic tunnels and allow water molecules to go through and, thus, to accelerate the diffusion of water molecules.
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Affiliation(s)
- Rentong Yu
- a Department of Polymer Science and Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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25
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Ou R, Wei J, Jiang L, Simon GP, Wang H. Robust Thermoresponsive Polymer Composite Membrane with Switchable Superhydrophilicity and Superhydrophobicity for Efficient Oil-Water Separation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:906-914. [PMID: 26704724 DOI: 10.1021/acs.est.5b03418] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Herein, we report for the first time on the fabrication of a robust, thermoresponsive polymer membrane produced by the combination of an elastic polyurethane (TPU) microfiber web and poly(N-isopropylacrylamide) (PNIPAM). PNIPAM hydrogel is evenly coated on the surface of TPU microfibers, and thus, the wettability of TPU-PNIPAM membrane is amplified by taking advantage of the hierarchical structure and increased surface roughness. The TPU-PNIPAM membrane possesses switchable superhydrophilicity and superhydrophobicity as the temperature of membrane changes from 25 to 45 °C. The composite membrane is shown successfully able to separate a 1 wt % oil-in-water emulsion and 1 wt % water-in-oil emulsion at 25 and 45 °C, respectively, with a high separation efficiency of ≥99.26%. Furthermore, the composite membranes show excellent mechanical properties, and they are highly flexible and mechanically tough. The smart composite membranes reported here have shown great potential for further development for practical high-efficiency oil-water separations.
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Affiliation(s)
- Ranwen Ou
- Department of Chemical Engineering, Monash University , Clayton, Victoria 3800, Australia
| | - Jing Wei
- Department of Chemical Engineering, Monash University , Clayton, Victoria 3800, Australia
| | - Lei Jiang
- Institute of Chemistry, Chinese Academy of Sciences , Beijing, 100190, China
- Department of Chemical Engineering, Monash University , Clayton, Victoria 3800, Australia
| | - George P Simon
- Department of Materials Engineering, Monash University , Clayton, Victoria 3800, Australia
| | - Huanting Wang
- Department of Chemical Engineering, Monash University , Clayton, Victoria 3800, Australia
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26
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Tong NAN, Nguyen TH, Nguyen DH, Nguyen CK, Tran NQ. Preparation of the Cationic Dendrimer-Based Hydrogels for Controlled Heparin Release. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2015. [DOI: 10.1080/10601325.2015.1067043] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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27
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Ullah F, Othman MBH, Javed F, Ahmad Z, Md Akil H. Classification, processing and application of hydrogels: A review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 57:414-33. [PMID: 26354282 DOI: 10.1016/j.msec.2015.07.053] [Citation(s) in RCA: 653] [Impact Index Per Article: 72.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 06/23/2015] [Accepted: 07/25/2015] [Indexed: 01/11/2023]
Abstract
This article aims to review the literature concerning the choice of selectivity for hydrogels based on classification, application and processing. Super porous hydrogels (SPHs) and superabsorbent polymers (SAPs) represent an innovative category of recent generation highlighted as an ideal mould system for the study of solution-dependent phenomena. Hydrogels, also termed as smart and/or hungry networks, are currently subject of considerable scientific research due to their potential in hi-tech applications in the biomedical, pharmaceutical, biotechnology, bioseparation, biosensor, agriculture, oil recovery and cosmetics fields. Smart hydrogels display a significant physiochemical change in response to small changes in the surroundings. However, such changes are reversible; therefore, the hydrogels are capable of returning to its initial state after a reaction as soon as the trigger is removed.
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Affiliation(s)
- Faheem Ullah
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Seri Ampangan, 14300 Nibong Tebal, Pulau Pinang, Malaysia
| | - Muhammad Bisyrul Hafi Othman
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Seri Ampangan, 14300 Nibong Tebal, Pulau Pinang, Malaysia
| | - Fatima Javed
- Department of Chemistry, Quaid-e-Azam University Islamabad, 45320 Islamabad, Pakistan
| | - Zulkifli Ahmad
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Seri Ampangan, 14300 Nibong Tebal, Pulau Pinang, Malaysia
| | - Hazizan Md Akil
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Seri Ampangan, 14300 Nibong Tebal, Pulau Pinang, Malaysia.
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28
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Radiation synthesis and characterization of Poly(butyl methacrylate/acrylamide) copolymeric hydrogels and heparin controlled drug release. Polym Bull (Berl) 2015. [DOI: 10.1007/s00289-015-1433-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Zhong Z. Professor Jan Feijen: A pioneer in biomedical polymers and controlled drug release. J Control Release 2015; 205:3-6. [DOI: 10.1016/j.jconrel.2015.03.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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31
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Li J, Cong H, Li L, Zheng S. Thermoresponse improvement of poly(N-isopropylacrylamide) hydrogels via formation of poly(sodium p-styrenesulfonate) nanophases. ACS APPLIED MATERIALS & INTERFACES 2014; 6:13677-13687. [PMID: 25036696 DOI: 10.1021/am503148v] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The block copolymer networks composed of poly(N-isopropylacrylamide) (PNIPAM) and poly(sodium p-styrenesulfonate) were synthesized via sequential reversible addition-fragmentation chain transfer (RAFT) polymerization with α,ω-didithiobenzoate-terminated poly(sodium p-styrenesulfonate) (PSSNa) as the macromolecular chain transfer agent. It was found that the block copolymer networks were microphase-separated as evidenced by means of transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS). In the block copolymer networks, spherical or cylindrical PSSNa microdomains were finely dispersed into continuous PNIPAM matrixes. In comparison with unmodified PNIPAM hydrogel, the nanostructured hydrogels displayed improved thermoresponsive properties. In addition, the swelling ratios of the PSSNa-modified PNIPAM hydrogels were significantly higher than that of plain PNIPAM hydrogel. The improvement of thermoresponse was attributable to the formation of the PSSNa nanophases, which promoted the transportation of water molecules in the cross-linked networks.
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Affiliation(s)
- Jingang Li
- Department of Polymer Science and Engineering and the State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University , Shanghai 200240, People's Republic of China
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32
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Cong H, Zheng S. Poly(N-isopropylacrylamide)-block-poly(acrylic acid) hydrogels: synthesis and rapid thermoresponsive properties. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3314-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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33
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Nagase K, Kobayashi J, Kikuchi A, Akiyama Y, Kanazawa H, Okano T. Monolithic Silica Rods Grafted with Thermoresponsive Anionic Polymer Brushes for High-Speed Separation of Basic Biomolecules and Peptides. Biomacromolecules 2014; 15:1204-15. [DOI: 10.1021/bm401779r] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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
| | - Jun Kobayashi
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University, TWIns, 8-1 Kawadacho, Shinjuku,
Tokyo 162-8666, Japan
| | - Akihiko Kikuchi
- Department
of Materials Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo 125-8585, Japan
| | - Yoshikatsu Akiyama
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University, TWIns, 8-1 Kawadacho, Shinjuku,
Tokyo 162-8666, Japan
| | - Hideko Kanazawa
- Faculty
of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo 105-8512, 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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34
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Anirudhan TS, Mohan AM. Novel pH switchable gelatin based hydrogel for the controlled delivery of the anti cancer drug 5-fluorouracil. RSC Adv 2014. [DOI: 10.1039/c3ra47991a] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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35
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El-Sherbiny IM, Yacoub MH. Hydrogel scaffolds for tissue engineering: Progress and challenges. Glob Cardiol Sci Pract 2013; 2013:316-42. [PMID: 24689032 PMCID: PMC3963751 DOI: 10.5339/gcsp.2013.38] [Citation(s) in RCA: 413] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 10/11/2013] [Indexed: 12/18/2022] Open
Abstract
Designing of biologically active scaffolds with optimal characteristics is one of the key factors for successful tissue engineering. Recently, hydrogels have received a considerable interest as leading candidates for engineered tissue scaffolds due to their unique compositional and structural similarities to the natural extracellular matrix, in addition to their desirable framework for cellular proliferation and survival. More recently, the ability to control the shape, porosity, surface morphology, and size of hydrogel scaffolds has created new opportunities to overcome various challenges in tissue engineering such as vascularization, tissue architecture and simultaneous seeding of multiple cells. This review provides an overview of the different types of hydrogels, the approaches that can be used to fabricate hydrogel matrices with specific features and the recent applications of hydrogels in tissue engineering. Special attention was given to the various design considerations for an efficient hydrogel scaffold in tissue engineering. Also, the challenges associated with the use of hydrogel scaffolds were described.
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Affiliation(s)
- Ibrahim M El-Sherbiny
- Center for Materials Science, University of Science and Technology, Zewail City of Science and Technology, 6th October City, 12588 Giza, Egypt
| | - Magdi H Yacoub
- Harefield Heart Science Centre, National Heart and Lung Institute, Imperial College, London, UK
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36
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Li HC, Hsieh FJ, Chen CP, Chang MY, Hsieh PCH, Chen CC, Hung SU, Wu CC, Chang HC. The hemocompatibility of oxidized diamond nanocrystals for biomedical applications. Sci Rep 2013; 3:3044. [PMID: 24157697 PMCID: PMC6505714 DOI: 10.1038/srep03044] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 10/07/2013] [Indexed: 11/24/2022] Open
Abstract
Low-dimensional carbon-based nanomaterials have recently received enormous attention for biomedical applications. However, increasing evidence indicates that they are cytotoxic and can cause inflammatory responses in the body. Here, we show that monocrystalline nanodiamonds (NDs) synthesized by high-pressure-high-temperature (HPHT) methods and purified by air oxidation and strong oxidative acid treatments have excellent hemocompatibility with negligible hemolytic and thrombogenic activities. Cell viability assays with human primary endothelial cells suggested that the oxidized HPHT-NDs (dimensions of 35-500 nm) are non-cytotoxic. No significant elevation of the inflammatory cytokine levels of IL-1β and IL-6 was detected in mice after intravenous injection of the nanocrystals in vivo. Using a hindlimb-ischemia mouse model, we demonstrated that 35-nm NDs after covalent conjugation with polyarginine are useful as a drug delivery vehicle of heparin for prolonged anticoagulation treatment. The present study lays a solid foundation for further therapeutic applications of NDs in biomedicine.
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Affiliation(s)
- Hung-Cheng Li
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
- These authors contributed equally to this work
| | - Feng-Jen Hsieh
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
- These authors contributed equally to this work
| | - Ching-Pin Chen
- Institute of Clinical Medicine, National Cheng Kung University & Hospital, Tainan 704, Taiwan
- Department of Biomedical Engineering, National Cheng Kung University & Hospital, Tainan 704, Taiwan
| | - Ming-Yao Chang
- Institute of Clinical Medicine, National Cheng Kung University & Hospital, Tainan 704, Taiwan
- Department of Biomedical Engineering, National Cheng Kung University & Hospital, Tainan 704, Taiwan
| | - Patrick C. H. Hsieh
- Institute of Clinical Medicine, National Cheng Kung University & Hospital, Tainan 704, Taiwan
- Department of Biomedical Engineering, National Cheng Kung University & Hospital, Tainan 704, Taiwan
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Chia-Chun Chen
- Department of Chemistry, National Taiwan Normal University, Taipei 116, Taiwan
| | - Shain-Un Hung
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou 545, Taiwan
| | - Che-Chih Wu
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou 545, Taiwan
| | - Huan-Cheng Chang
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
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37
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Affiliation(s)
- Samaneh Khanlari
- Department of Chemical and Biological Engineering; Centre for Catalysis Research and Innovation; University of Ottawa; 161 Louis Pasteur Pvt. Ottawa ON, Canada K1N 6N5
| | - Marc A. Dubé
- Department of Chemical and Biological Engineering; Centre for Catalysis Research and Innovation; University of Ottawa; 161 Louis Pasteur Pvt. Ottawa ON, Canada K1N 6N5
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38
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París R, Marcos-Fernández Á, Quijada-Garrido I. Synthesis and characterization of poly(ethylene glycol)-based thermo-responsive polyurethane hydrogels for controlled drug release. POLYM ADVAN TECHNOL 2013. [DOI: 10.1002/pat.3181] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Rodrigo París
- Instituto de Ciencia y Tecnología de Polímeros; Consejo Superior de Investigaciones Científicas (ICTP-CSIC); c/ Juan de la Cierva 3. E-28006 Madrid Spain
| | - Ángel Marcos-Fernández
- Instituto de Ciencia y Tecnología de Polímeros; Consejo Superior de Investigaciones Científicas (ICTP-CSIC); c/ Juan de la Cierva 3. E-28006 Madrid Spain
| | - Isabel Quijada-Garrido
- Instituto de Ciencia y Tecnología de Polímeros; Consejo Superior de Investigaciones Científicas (ICTP-CSIC); c/ Juan de la Cierva 3. E-28006 Madrid Spain
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39
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Poly methacrylic acid modified CDHA nanocomposites as potential pH responsive drug delivery vehicles. Colloids Surf B Biointerfaces 2013; 108:219-28. [DOI: 10.1016/j.colsurfb.2013.02.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Revised: 01/08/2013] [Accepted: 02/06/2013] [Indexed: 11/15/2022]
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40
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Razmjou A, Barati MR, Simon GP, Suzuki K, Wang H. Fast deswelling of nanocomposite polymer hydrogels via magnetic field-induced heating for emerging FO desalination. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:6297-6305. [PMID: 23663180 DOI: 10.1021/es4005152] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Freshwater shortage is one of the most pressing global issues. Forward osmosis (FO) desalination technology is emerging for freshwater production from saline water, which is potentially more energy-efficient than the current reverse osmosis process. However, the lack of a suitable draw solute is the major hurdle for commercial implementation of the FO desalination technology. We have previously reported that thermoresponsive hydrogels can be used as the draw agent for a FO process, and this new hydrogel-driven FO process holds promise for further development for practical application. In the present work, magnetic field-induced heating is explored for the purpose of developing a more effective way to recover water from swollen hydrogel draw agents. The composite hydrogel particles are prepared by copolymerization of sodium acrylate and N-isopropylacrylamide in the presence of magnetic nanoparticles (γ-Fe2O3, <50 nm). The results indicate that the magnetic heating is an effective and rapid method for dewatering of hydrogels by generating the heat more uniformly throughout the draw agent particles, and thus, a dense skin layer commonly formed via conventional heating from the outside of the particle is minimized. The FO dewatering performance is affected by the loading of magnetic nanoparticles and magnetic field intensity. Significantly enhanced liquid water recovery (53%) is achieved under magnetic heating, as opposed to only around 7% liquid water recovery obtained via convection heating. Our study shows that the magnetic heating is an attractive alternative stimulus for the extraction of highly desirable liquid water from the draw agent in the polymer hydrogel-driven forward osmosis process.
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Affiliation(s)
- Amir Razmjou
- Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia
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41
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Huang C, Wang S, Qiu L, Ke Q, Zhai W, Mo X. Heparin loading and pre-endothelialization in enhancing the patency rate of electrospun small-diameter vascular grafts in a canine model. ACS APPLIED MATERIALS & INTERFACES 2013; 5:2220-2226. [PMID: 23465348 DOI: 10.1021/am400099p] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We herein proved that the two commonly used antithrombotic methods, heparin loading and pre-endothelialization could both greatly enhance the patency rate of a small-diameter graft in a canine model. Tubular grafts having an inner diameter of 4 mm were prepared by electrospinning poly(l-lactide-co-ε-caprolactone) (P(LLA-CL)) and heparin through a coaxial electrospinning technique. Seventy-two percent of heparin was found to be released sustainably from the graft within 14 days. To prepare the pre-endothelialized grafts, we seeded endothelial cells isolated from the femoral artery and cultured then dynamically on the lumen until a cell monolayer was formed. Digital subtraction angiography (DSA) and color Doppler flow imaging (CDFI) were used to monitor the patency without sacrificing the animals. Histological analyses revealed that following the direction of blood flow, a cell monolayer was formed at the proximal end of the heparin-loaded grafts, but such a monolayer could be found in the middle or distal region of the grafts. In contrast, the whole luminal surface of the pre-endothelialized graft was covered by a cell monolayer, suggesting the in vivo survival of the preseeded cells. This demonstrated that heparin was a comparatively simple method to achieve good patency, but the pre-endothelialization had better mechanical properties and cellular compatibility.
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Affiliation(s)
- Chen Huang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China
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42
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Tiwari A, Sharma Y, Hattori S, Terada D, Sharma AK, Turner APF, Kobayashi H. Influence of poly(n-isopropylacrylamide)-CNT-polyaniline three-dimensional electrospun microfabric scaffolds on cell growth and viability. Biopolymers 2013; 99:334-41. [DOI: 10.1002/bip.22170] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Revised: 09/15/2012] [Accepted: 09/28/2012] [Indexed: 11/10/2022]
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43
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Nagase K, Kobayashi J, Kikuchi A, Akiyama Y, Kanazawa H, Okano T. Thermally modulated cationic copolymer brush on monolithic silica rods for high-speed separation of acidic biomolecules. ACS APPLIED MATERIALS & INTERFACES 2013; 5:1442-1452. [PMID: 23394252 DOI: 10.1021/am302889j] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Poly(N-isopropylacrylamide (IPAAm)-co-2-(dimethylamino)ethylmethacrylate(DMAEMA)-co-tert-butylacrylamide (tBAAm)), a thermoresponsive-cationic-copolymer, brush-grafted monolithic-silica column was prepared through surface-initiated atom transfer radical polymerization (ATRP) for effective thermoresponsive anion-exchange chromatography matrices. ATRP-initiator was grafted on monolithic silica-rod surfaces by flowing a toluene solution containing ATRP initiator into monolithic silica-rod columns. IPAAm, DMAEMA, and tBAAm monomers and CuCl/CuCl₂/Me₆TREN, an ATRP catalytic system, were dissolved in 2-propanol, and the reaction solution was pumped into the preprepared initiator modified columns at 25 °C for 16 h. The constructed copolymer-brush structure on monolithic silica-rod surface was confirmed by X-ray photoelectron spectroscopy (XPS), elemental analysis, scanning electron microscopy (SEM) observation, and gel permeation chromatography (GPC) measurement of grafted copolymer. The prepared monolithic silica-rod columns were also characterized by chromatographic analysis. The cationic copolymer brush modified monolithic silica-rod columns were able to separate adenosine nucleotides with a shorter analysis time (4 min) than thermoresponsive copolymer brush-modified silica-bead-packed columns, because of the reduced diffusion path length of monolithic supporting materials. These results indicated that thermoresponsive cationic copolymer brush grafted monolithic silica-rod column prepared by ATRP was a promising tool for analyzing acidic-bioactive compounds with a remarkably short analysis time.
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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
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44
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Cong H, Li L, Zheng S. Poly(N-isopropylacrylamide)-block-poly(vinyl pyrrolidone) block copolymer networks: Synthesis and rapid thermoresponse of hydrogels. POLYMER 2013. [DOI: 10.1016/j.polymer.2012.12.069] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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45
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Swamy BY, Prasad CV, Reddy CLN, Chung I, Rao KC, Subha MCS. Temperature-Sensitive Microspheres for Controlled Release of Enalprilmaleate. INT J POLYM MATER PO 2013. [DOI: 10.1080/00914037.2011.641631] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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46
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47
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Overstreet DJ, Huynh R, Jarbo K, McLemore RY, Vernon BL. In situ forming, resorbable graft copolymer hydrogels providing controlled drug release. J Biomed Mater Res A 2012; 101:1437-46. [PMID: 23114985 DOI: 10.1002/jbm.a.34443] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 07/30/2012] [Accepted: 08/28/2012] [Indexed: 11/09/2022]
Abstract
In situ forming hydrogels are promising drug delivery vehicles due to their ease of delivery as liquids and their ability to be used in sites with irregular geometries. In this work, we report on in situ forming, resorbable hydrogels based on N-isopropylacrylamide (NIPAAm) as a fluid-like controlled release gel. These gels are the first resorbable NIPAAm-based gels providing controlled release without relying on affinity between the drug and device. Therefore, these gels provide a more flexible delivery system which can be used to deliver any drug at a controlled rate. The polymers contain repeat units of NIPAAm with (R)-α-Acryloyloxy-β,β-dimethyl-γ-butyrolactone (DBLA) and varying amounts of hydrophilic Jeffamine® M-1000 acrylamide (JAAm) grafts. The graft copolymer architecture allows the water content of the hydrogels to be tuned over a wide range while keeping the initial gelation temperature below body temperature. Incorporation of JAAm in the polymers led to greater water content, faster gel degradation, and reduced burst release. Sustained release of the antimicrobial drugs cefazolin and vancomycin (over about 5 and 7 days, respectively) was observed from gels containing an intermediate amount of grafts which combined reduced phase separation with a degradation time of 40 days. The degradation byproducts of one hydrogel formulation were cytocompatible to NIH 3T3 fibroblasts at concentrations up to 2.5 wt %. This class of terpolymer hydrogels is a promising local delivery system for a wide variety of drugs, particularly for applications involving irregular geometries such as implant interfaces.
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Affiliation(s)
- Derek J Overstreet
- Center for Interventional Biomaterials, School of Biological and Health Systems Engineering, Arizona State University, Tempe, Arizona 85287-9709, USA
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48
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Fathi M, Entezami AA, Ebrahimi A, Safa KD. Synthesis of thermosensitive nanohydrogels by crosslinker free method based on N-isopropylacrylamide: Applicable in the naltrexone sustained release. Macromol Res 2012. [DOI: 10.1007/s13233-012-0181-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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49
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Olejnik A, Goscianska J, Nowak I. Active compounds release from semisolid dosage forms. J Pharm Sci 2012; 101:4032-45. [PMID: 22886492 DOI: 10.1002/jps.23289] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 07/17/2012] [Accepted: 07/18/2012] [Indexed: 11/09/2022]
Abstract
The aim of this paper is to review all the aspects of the in vitro release testing (IVRT) from semisolid dosage forms. Although none of the official dissolution methods has been specified for use with semisolid dosage forms, their utility for assessing release rates of drugs from semisolid dosage forms has become a topic of considerable interest. One can expect to overcome such complexity in the future, when the official "Topical and Transdermal Drug Products-Product Performance Tests" will be published in an issue of the Pharmacopeial Forum. Many factors such as type of the dissolution medium, membrane, temperature, and speed have an influence on the mechanism and kinetics of the release testing from gels, creams, and ointments; therefore, those parameters have been widely discussed.
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Affiliation(s)
- Anna Olejnik
- Adam Mickiewicz University in Poznan, Faculty of Chemistry, ul. Umultowska 89b, 61-714 Poznań, Poland.
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50
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Baldwin AD, Robinson KG, Militar J, Derby CD, Kiick KL, Akins RE. In situ crosslinkable heparin-containing poly(ethylene glycol) hydrogels for sustained anticoagulant release. J Biomed Mater Res A 2012; 100:2106-18. [PMID: 22615105 PMCID: PMC4096162 DOI: 10.1002/jbm.a.34050] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2011] [Accepted: 11/29/2011] [Indexed: 11/08/2022]
Abstract
Low-molecular weight heparin (LMWH) is widely used in anticoagulation therapies and for the prevention of thrombosis. LMWH is administered by subcutaneous injection usually once or twice per day. This frequent and invasive delivery modality leads to compliance issues for individuals on prolonged therapeutic courses, particularly pediatric patients. Here, we report a long-term delivery method for LMWH via subcutaneous injection of long-lasting hydrogels. LMWH is modified with reactive maleimide groups so that it can be crosslinked into continuous networks with four-arm thiolated poly(ethylene glycol) (PEG-SH). Maleimide-modified LMWH (Mal-LMWH) retains bioactivity as indicated by prolonged coagulation time. Hydrogels comprising PEG-SH and Mal-LMWH degrade via hydrolysis, releasing bioactive LMWH by first-order kinetics with little initial burst release. Separately dissolved Mal-LMWH and PEG-SH solutions were co-injected subcutaneously in New Zealand White rabbits. The injected solutions successfully formed hydrogels in situ and released LMWH as measured via chromogenic assays on plasma samples, with accumulation of LMWH occurring at day 2 and rising to near-therapeutic dose equivalency by day 5. These results demonstrate the feasibility of using LMWH-containing, crosslinked hydrogels for sustained and controlled release of anticoagulants.
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Affiliation(s)
- Aaron D. Baldwin
- Department of Materials Science and Engineering, 201 DuPont Hall, University of Delaware, Newark, DE 19716, USA
| | - Karyn G. Robinson
- Tissue Engineering and Regenerative Medicine Laboratory, Nemours Biomedical Research, Alfred I. duPont Hospital for Children, Wilmington, DE 19803, USA
| | - Jaimee Militar
- Tissue Engineering and Regenerative Medicine Laboratory, Nemours Biomedical Research, Alfred I. duPont Hospital for Children, Wilmington, DE 19803, USA
| | - Christopher D. Derby
- Tissue Engineering and Regenerative Medicine Laboratory, Nemours Biomedical Research, Alfred I. duPont Hospital for Children, Wilmington, DE 19803, USA
| | - Kristi L. Kiick
- Department of Materials Science and Engineering, 201 DuPont Hall, University of Delaware, Newark, DE 19716, USA
- Tissue Engineering and Regenerative Medicine Laboratory, Nemours Biomedical Research, Alfred I. duPont Hospital for Children, Wilmington, DE 19803, USA
- Delaware Biotechnology Institute, 15 Innovation Way, Newark, DE 19716, USA
| | - Robert E. Akins
- Tissue Engineering and Regenerative Medicine Laboratory, Nemours Biomedical Research, Alfred I. duPont Hospital for Children, Wilmington, DE 19803, USA
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