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Lacroce E, Rossi F. Polymer-based thermoresponsive hydrogels for controlled drug delivery. Expert Opin Drug Deliv 2022; 19:1203-1215. [PMID: 35575265 DOI: 10.1080/17425247.2022.2078806] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION controlled drug delivery through hydrogels is generally limited by the poor barrier that polymeric network can create to diffusion mechanism. Stimuli responsive polymers can help in this way guaranteeing that delivery can be sustained and finely controlled using an external stimulus. AREA COVERED this review provides an overview of recent studies about the use of temperature as an external stimulus able to work as an efficient new route of drug's administration. Thermoresponsive hydrogels are discussed and compared in terms of physical properties and mechanism of drug release considering their classification in intrinsically (formed by thermosensitive polymers) and non-intrinsically (polymers with thermosensitive moieties) hydrogels. EXPERT OPINION thermoresponsive hydrogels can be developed by using different polymers added or not with micro/nanoparticles of organic or inorganic origin. In both cases the final system represents an innovative way for the local and sustained drug delivery in a specific site of the body. In particular, it is possible to obtain an on-demand release of drug by applying a local increase of temperature to the system.
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Affiliation(s)
- Elisa Lacroce
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via Mancinelli 7, 20131 Milano, Italy
| | - Filippo Rossi
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via Mancinelli 7, 20131 Milano, Italy
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2
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Gonsalves A, Tambe P, Le D, Thakore D, Wadajkar AS, Yang J, Nguyen KT, Menon JU. Synthesis and characterization of a novel pH-responsive drug-releasing nanocomposite hydrogel for skin cancer therapy and wound healing. J Mater Chem B 2021; 9:9533-9546. [PMID: 34757371 PMCID: PMC8725646 DOI: 10.1039/d1tb01934a] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Local skin cancer recurrence occurs in ∼12% of the patients post-surgery due to persistent growth of residual cancer cells. Wound infection is another significant complication following surgery. We report a novel in situ-forming nanocomposite hydrogel (NCH) containing PLGA-carboxymethyl chitosan nanoparticles (186 nm) for localized pH-responsive skin cancer therapy and wound healing. This injectable hydrogel, comprising of a citric acid-derived polymer backbone, gelled within 5 minutes, and demonstrated excellent swelling (283% of dry weight) and compressive strengths (∼5.34 MPa). Nanoparticle incorporation did not significantly affect hydrogel properties. The NCH effluents were cytocompatible with human dermal fibroblasts at 500 μg ml-1 concentration and demonstrated pH-dependent drug release and promising therapeutic efficacy against A431 and G361 skin cancer cells in vitro. Significant zones of inhibition were observed in S. aureus and E. coli cultures on NCH treatment, confirming its antibacterial properties. Our studies show that the pH-responsive NCH can be potentially used for adjuvant skin cancer treatment and wound healing.
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Affiliation(s)
- Andrea Gonsalves
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, 7 Greenhouse Road, Kingston, RI 02881, USA.
| | - Pranjali Tambe
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Department of Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Duong Le
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, 7 Greenhouse Road, Kingston, RI 02881, USA.
| | - Dheeraj Thakore
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Department of Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Aniket S Wadajkar
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Department of Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Jian Yang
- Department of Biomedical Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - Kytai T Nguyen
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Department of Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jyothi U Menon
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, 7 Greenhouse Road, Kingston, RI 02881, USA.
- Department of Chemical Engineering, University of Rhode Island, Kingston, RI 02881, USA
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Dadvand Koohi A, Nasimi F. Influence of Salt and Surfactant on Copper Removal by Xanthan Gum-g-Itaconic Acid/Bentonite Hydrogel Composite from Water Using Fractional Factorial Design. CHEM ENG COMMUN 2017. [DOI: 10.1080/00986445.2017.1322071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ahmad Dadvand Koohi
- Chemical Engineering Department, Engineering Faculty, University of Guilan, Rasht, Iran
| | - Fatemeh Nasimi
- Chemical Engineering Department, Engineering Faculty, University of Guilan, Rasht, Iran
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Shukla SK, Shukla SK, Govender PP, Giri NG. Biodegradable polymeric nanostructures in therapeutic applications: opportunities and challenges. RSC Adv 2016. [DOI: 10.1039/c6ra15764e] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Biodegradable polymeric nanostructures (BPNs) have shown great promise in different therapeutic applications such as diagnosis, imaging, drug delivery, cosmetics, organ implants, and tissue engineering.
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Affiliation(s)
- S. K. Shukla
- Department of Polymer Science
- Bhaskaracharya College of Applied Sciences
- University of Delhi
- Delhi-110075
- India
| | - Sudheesh K. Shukla
- Department of Applied Chemistry
- University of Johannesburg
- Johannesburg
- South Africa
| | - Penny P. Govender
- Department of Applied Chemistry
- University of Johannesburg
- Johannesburg
- South Africa
| | - N. G. Giri
- Department of Chemistry
- Shivaji College
- University of Delhi
- New Delhi-110027
- India
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5
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Hosseini H, Tenhu H, Hietala S. Rheological properties of thermoresponsive nanocomposite hydrogels. J Appl Polym Sci 2015. [DOI: 10.1002/app.43123] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hossein Hosseini
- Department of Chemical Engineering; Abadan Branch, Islamic Azad University; Abadan Iran
| | - Heikki Tenhu
- Department of Chemistry; Laboratory of Polymer Chemistry, PB 55, 00014, University of Helsinki; Finland
| | - Sami Hietala
- Department of Chemistry; Laboratory of Polymer Chemistry, PB 55, 00014, University of Helsinki; Finland
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Xie Z, Aphale NV, Kadapure TD, Wadajkar AS, Orr S, Gyawali D, Qian G, Nguyen KT, Yang J. Design of antimicrobial peptides conjugated biodegradable citric acid derived hydrogels for wound healing. J Biomed Mater Res A 2015; 103:3907-18. [PMID: 26014899 DOI: 10.1002/jbm.a.35512] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 05/07/2015] [Accepted: 05/19/2015] [Indexed: 01/13/2023]
Abstract
Wound healing is usually facilitated by the use of a wound dressing that can be easily applied to cover the wound bed, maintain moisture, and avoid bacterial infection. In order to meet all of these requirements, we developed an in situ forming biodegradable hydrogel (iFBH) system composed of a newly developed combination of biodegradable poly(ethylene glycol) maleate citrate (PEGMC) and poly(ethylene glycol) diacrylate (PEGDA). The in situ forming hydrogel systems are able to conform to the wound shape in order to cover the wound completely and prevent bacterial invasion. A 2(k) factorial analysis was performed to examine the effects of polymer composition on specific properties, including the curing time, Young's modulus, swelling ratio, and degradation rate. An optimized iFBH formulation was achieved from the systematic factorial analysis. Further, in vitro biocompatibility studies using adult human dermal fibroblasts (HDFs) confirmed that the hydrogels and degradation products are not cytotoxic. The iFBH wound dressing was conjugated and functionalized with antimicrobial peptides as well. Evaluation against bacteria both in vitro and in vivo in rats demonstrated that the peptide-incorporated iFBH wound dressing offered excellent bacteria inhibition and promoted wound healing. These studies indicated that our in situ forming antimicrobial biodegradable hydrogel system is a promising candidate for wound treatment.
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Affiliation(s)
- Zhiwei Xie
- Department of Biomedical Engineering, Materials Research Institute, the Huck Institutes of the Life Sciences, the Pennsylvania State University, University Park, Pennsylvania, 16802
| | - Nikhil V Aphale
- Department of Bioengineering, the University of Texas at Arlington, Arlington, Texas, 76019.,Joint Biomedical Engineering Program between the University of Texas at Arlington and the University of Texas Southwestern Medical Center, Dallas, Texas, 75390
| | - Tejaswi D Kadapure
- Department of Bioengineering, the University of Texas at Arlington, Arlington, Texas, 76019.,Joint Biomedical Engineering Program between the University of Texas at Arlington and the University of Texas Southwestern Medical Center, Dallas, Texas, 75390
| | - Aniket S Wadajkar
- Department of Bioengineering, the University of Texas at Arlington, Arlington, Texas, 76019.,Joint Biomedical Engineering Program between the University of Texas at Arlington and the University of Texas Southwestern Medical Center, Dallas, Texas, 75390
| | - Sara Orr
- Department of Biomedical Engineering, Materials Research Institute, the Huck Institutes of the Life Sciences, the Pennsylvania State University, University Park, Pennsylvania, 16802
| | - Dipendra Gyawali
- Department of Bioengineering, the University of Texas at Arlington, Arlington, Texas, 76019.,Joint Biomedical Engineering Program between the University of Texas at Arlington and the University of Texas Southwestern Medical Center, Dallas, Texas, 75390
| | - Guoying Qian
- Department of Biology, College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, 315100, China
| | - Kytai T Nguyen
- Department of Bioengineering, the University of Texas at Arlington, Arlington, Texas, 76019.,Joint Biomedical Engineering Program between the University of Texas at Arlington and the University of Texas Southwestern Medical Center, Dallas, Texas, 75390
| | - Jian Yang
- Department of Biomedical Engineering, Materials Research Institute, the Huck Institutes of the Life Sciences, the Pennsylvania State University, University Park, Pennsylvania, 16802
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Shaker MA, Younes HM. Photo-irradiation paradigm: Mapping a remarkable facile technique used for advanced drug, gene and cell delivery. J Control Release 2015; 217:10-26. [PMID: 26184048 DOI: 10.1016/j.jconrel.2015.07.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 07/02/2015] [Accepted: 07/03/2015] [Indexed: 12/13/2022]
Abstract
Undoubtedly, the progression of photo-irradiation technique has provided a smart engineering tool for the state-of-the-art biomaterials that guide the biomedical and therapeutic domains for promoting the modern pharmaceutical industry. Many investigators had exploited such a potential technique to create/ameliorate numerous pharmaceutical carriers. These carriers show promising applications that vary from small drug to therapeutic protein delivery and from gene to living cell encapsulation design. Harmony between the properties of precisely engineered precursors and the formed network structure broadens the investigator's intellect for both brilliant creations and effective applications. As well, controlling photo-curing at the formulation level, through manipulating the absorption of light stimuli, photoinitiator system and photo-responsive precursor, facilitates the exploration of novel distinctive biomaterials. Discussion of utilizing different photo-curing procedures in designing/formulation of different pharmaceutical carriers is the main emphasis of this review. In addition, recent applications of these intelligent techniques in targeted, controlled, and sustained drug delivery with understanding of photo-irradiation concept and mechanism are illustrated.
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Affiliation(s)
- Mohamed A Shaker
- Pharmaceutics Department, College of Pharmacy, PO Box 30040, Taibah University, Al Madina Al Munawara, Saudi Arabia; Pharmaceutics Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt.
| | - Husam M Younes
- Pharmaceutics & Polymeric Drug Delivery Research Lab (PPDDRL), College of Pharmacy, PO Box 2713, Qatar University, Doha, Qatar
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Lau HK, Kiick KL. Opportunities for multicomponent hybrid hydrogels in biomedical applications. Biomacromolecules 2015; 16:28-42. [PMID: 25426888 PMCID: PMC4294583 DOI: 10.1021/bm501361c] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 11/14/2014] [Indexed: 02/08/2023]
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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9
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Dong Y, Cao R, Li Y, Wang Z, Li L, Tian L. Folate-conjugated nanodiamond for tumor-targeted drug delivery. RSC Adv 2015. [DOI: 10.1039/c5ra12383f] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Relying on the role of folate and folate receptors, NPFD nanoparticles tend to selectively discriminate tumor cells from normal cells and enter the cells by clathrin-dependent and receptor-mediated endocytosis.
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Affiliation(s)
- Yu Dong
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- PR China
| | - Ruixia Cao
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- PR China
| | - Yingqi Li
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- PR China
| | - Zhiqin Wang
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- PR China
| | - Lin Li
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education
- Institute of Molecular Science
- Shanxi University
- Taiyuan 030006
- PR China
| | - Lu Tian
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- PR China
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10
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Zhang L, Ma Y, Zhao C, Zhu X, Chen R, Yang W. Synthesis of pH-responsive hydrogel thin films grafted on PCL substrates for protein delivery. J Mater Chem B 2015; 3:7673-7681. [DOI: 10.1039/c5tb01149c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new visible light induced graft polymerization method was utilized to prepare pH-sensitive hydrogel layers covalently attached to polymer substrates for drug delivery.
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Affiliation(s)
- Lihua Zhang
- Beijing Laboratory of Biomedical Materials
- Beijing University of Chemical Technology
- Beijing 100029
- China
- State Key Laboratory of Chemical Resource Engineering
| | - Yuhong Ma
- Key Laboratory of Carbon Fiber and Functional Polymers
- Ministry of Education
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Changwen Zhao
- Beijing Laboratory of Biomedical Materials
- Beijing University of Chemical Technology
- Beijing 100029
- China
- State Key Laboratory of Chemical Resource Engineering
| | - Xing Zhu
- Beijing Laboratory of Biomedical Materials
- Beijing University of Chemical Technology
- Beijing 100029
- China
- State Key Laboratory of Chemical Resource Engineering
| | - Ruichao Chen
- Beijing Laboratory of Biomedical Materials
- Beijing University of Chemical Technology
- Beijing 100029
- China
- State Key Laboratory of Chemical Resource Engineering
| | - Wantai Yang
- Beijing Laboratory of Biomedical Materials
- Beijing University of Chemical Technology
- Beijing 100029
- China
- State Key Laboratory of Chemical Resource Engineering
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Transferrin-conjugated nanodiamond as an intracellular transporter of chemotherapeutic drug and targeting therapy for cancer cells. Ther Deliv 2014; 5:511-24. [PMID: 24998271 DOI: 10.4155/tde.14.17] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
AIM PEGylated fluorescent nanodiamond (FND) conjugated with Tf (FND-PEG-Tf) was investigated for targeted drug delivery. MATERIALS & METHODS Human hepatoma (HepG2) and normal (L-02) cell lines were used to investigate the difference in cellular uptake of FND-PEG-Tf and its loading drug system. Nanoparticle uptake was evaluated by flow cytometry and laser scanning confocal microscopy. RESULTS FND-PEG-Tf showed highly specific TfR-mediated uptake by HepG2 cells, relative to negative controls (L-02 cell), which was a strong correlation among TfR density on the cell surface. The mechanism of TfR-mediated uptake was attested by free Tf with Fe³⁺ as a competitive agent. The difference in cell viability between L-02 and HepG2 cells treated with doxorubicin hydrochloride (DOX) nanoparticles (FND-PEG-Tf-DOX) can be explained by FND-PEG-Tf, which can target drug delivery to cancer cells. CONCLUSION FND-PEG-Tf can potentially be utilized in targeted cancer cell imaging and effective drug delivery for cancer therapy.
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Maslovskis A, Guilbaud JB, Grillo I, Hodson N, Miller AF, Saiani A. Self-assembling peptide/thermoresponsive polymer composite hydrogels: effect of peptide-polymer interactions on hydrogel properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:10471-80. [PMID: 25095719 DOI: 10.1021/la502358b] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We have investigated the effect of doping the self-assembling octapeptide FEFEFKFK (F, phenylalanine; E, glutamic acid; K, lysine) hydrogels with various amounts of thermoresponsive conjugate of FEFEFKFK and poly(N-isopropylacrylamide) (PNIPAAm) in order to create novel hydrogels. The samples were characterized using a range of techniques including microdifferential scanning calorimetry (μDSC), oscillatory rheology, transmission electron microscopy (TEM), atomic force microscopy (AFM), and small angle neutron scattering (SANS). The peptide from the conjugate was shown to be incorporated into the peptide fiber, resulting in the polymer being anchored to the peptide fiber. The conjugation of the polymer to the peptide and its anchoring to the peptide fibers did not affect its lower critical solution temperature (LCST). On the other hand, it did result in a decrease in the LCST enthalpy and a significant increase in the G' of the hydrogels, suggesting the presence of hydrogen bond interactions between the peptide and the polymer. As a result, the polymer was found to adopt a fibrillar arrangement tightly covering the peptide fiber. The polymer was still found to go through a conformational change at the LCST, suggesting that it collapses onto the peptide fiber. On the other hand, the fibrillar network was found to be mainly unaffected by the polymer LCST. These changes at the LCST were also found to be fully reversible. The nature of the interaction between the polymer and the peptide was shown to have a significant effect on the conformation adopted by the polymer around the fibers and the mechanical properties of the hydrogels.
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Affiliation(s)
- A Maslovskis
- Manchester Institute of Biotechnology and School of Chemical Engineering & Analytical Science, The University of Manchester , Oxford Road, Manchester, M13 9PL, U.K
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Komabayashi T, Wadajkar A, Santimano S, Ahn C, Zhu Q, Opperman LA, Bellinger LL, Yang J, Nguyen KT. Preliminary study of light-cured hydrogel for endodontic drug delivery vehicle. ACTA ACUST UNITED AC 2014; 7:87-92. [PMID: 25048311 DOI: 10.1111/jicd.12118] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 10/22/2013] [Indexed: 11/29/2022]
Abstract
AIM Direct pulp capping is the treatment of an exposed vital pulp with a dental material to facilitate the formation of reparative dentin and maintenance of vital pulp. A bioengineered drug delivery vehicle has the potential to increase the success rate of pulp capping. The aim of this study was to develop an injectable and light-curing drug delivery vehicle for endodontic treatment including direct pulp capping. METHODS Polyethylene glycol-maleate-citrate (PEGMC) hydrogel was synthesized as a drug delivery vehicle that is composed of PEGMC (45% w/v), acrylic acid (AA) (5% w/v), 2,2'-azobis(2-methylpropionamidine) dihydrochloride (AAPH) (0.1% w/v), and deionized water. The association between prehydrogel-solution volume and visible light-curing was examined. The cytotoxicity of the hydrogel was tested using L929 cells in a cell culture system. Ca(2+) release from the hydrogel was determined using calcium hydroxide as the incorporated medicine. RESULTS The results showed that the light-curing time for hydrogel is comparable to composite resin. The hydrogel had cell toxicity similar to adhesive systems. Moreover, controlled Ca(2+) release was obtained from the calcium hydroxide incorporated hydrogel. CONCLUSIONS The data suggest that hydrogel should be explored further as a promising drug delivery vehicle for vital pulp therapy and regenerative endodontics.
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Affiliation(s)
- Takashi Komabayashi
- Department of Endodontics, West Virginia University School of Dentistry, Morgantown, WV, USA
| | - Aniket Wadajkar
- Department of Bioengineering, University of Texas, Arlington, TX, USA
| | - Sonia Santimano
- Department of Bioengineering, University of Texas, Arlington, TX, USA
| | - Chul Ahn
- Department of Clinical Sciences, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Qiang Zhu
- Division of Endodontology, University of Connecticut Health Center, Farmington, CT, USA
| | - Lynn A Opperman
- Department of Biomedical Sciences, Texas A&M Health Science Center, Baylor College of Dentistry, Dallas, TX, USA
| | - Larry L Bellinger
- Department of Biomedical Sciences, Texas A&M Health Science Center, Baylor College of Dentistry, Dallas, TX, USA
| | - Jian Yang
- Department of Bioengineering, University of Texas, Arlington, TX, USA
| | - Kytai T Nguyen
- Department of Bioengineering, University of Texas, Arlington, TX, USA
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Zhao H, Zheng C, Feng G, Zhao Y, Liang H, Wu H, Zhou G, Liang B, Wang Y, Xia X. Temperature-sensitive poly(N-isopropylacrylamide-co-butyl methylacrylate) nanogel as an embolic agent: distribution, durability of vascular occlusion, and inflammatory reactions in the renal artery of rabbits. AJNR Am J Neuroradiol 2013; 34:169-76. [PMID: 22859278 DOI: 10.3174/ajnr.a3177] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND AND PURPOSE We have developed a new thermosensitive liquid embolic agent, PIB nanogel, that can be solidified at body temperature. We thus further investigated the distribution, durability of vascular occlusion, and inflammatory reactions of PIB in embolization of the renal artery of rabbits. MATERIALS AND METHODS The bilateral renal arteries of 9 rabbits were first embolized with PIB at different injection rates. The distribution pattern of PIB was investigated by contact radiography and histology 1 hour after embolization. The right renal arteries of 20 rabbits were then embolized with PIB at the proper injection rate. Angiography and pathologic examination of the kidneys were performed at 1 week and 1, 2, and 3 months after embolization to evaluate the long-term outcomes. RESULTS With the injection rate increasing, PIB could reach the more distal branch of the renal artery. The proper injection rate was chosen as 0.10 mL/s due to the homogeneous distribution of PIB from the main renal artery to the precapillary level at this rate. During a 3-month follow-up observation period, no angiographic recanalization was observed. Histologically, we found no disruption of the vessel wall or subintimal bleeding, no extravasation of PIB, and no evidence of neovascularization. Moreover, there was only a mild inflammatory response, manifested by few lymphocytic and monocellular infiltration, without foreign body granuloma formation. CONCLUSIONS Embolization of the renal artery with PIB was easy and controllable, which could lead to a homogeneous and persistent occlusion without severe inflammatory changes. PIB might be a suitable material for intravascular embolization.
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Affiliation(s)
- H Zhao
- Department of Radiology, Union Hospital, Tongji Medical College, Wuhan, China
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Jiang B, Larson JC, Drapala PW, Pérez-Luna VH, Kang-Mieler JJ, Brey EM. Investigation of lysine acrylate containing poly(N-isopropylacrylamide) hydrogels as wound dressings in normal and infected wounds. J Biomed Mater Res B Appl Biomater 2011; 100:668-76. [DOI: 10.1002/jbm.b.31991] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Revised: 09/13/2011] [Accepted: 09/20/2011] [Indexed: 01/02/2023]
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