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Zhu B, Zong T, Zheng R, Chen X, Zhou Y, Liu Y, Yan J, Zhao B, Yin J. Acid and Glutathione Dual-Responsive, Injectable and Self-Healing Hydrogels for Controlled Drug Delivery. Biomacromolecules 2024; 25:1838-1849. [PMID: 38378470 DOI: 10.1021/acs.biomac.3c01274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
Considering the complexity of physiological microenvironments and the risks of surgical infection, there still remains critical demand to develop a hydrogel as a drug release platform with multifunctional properties, including good neutral stability and sensitive multiple stimuli-responsive behaviors, as well as injectable and self-healing properties. Herein, we present a facile preparation of injectable, self-healing hydrogels with acid and glutathione (GSH) dual-responsiveness for controlled drug delivery. Initially, the anticancer drug camptothecin (CPT) was premodified with disulfide bonds and attached to poly(ethylenimine) (PEI) via the Schiff base reaction, resulting in PEI-CPT. Subsequently, OSA-IR780 was synthesized through the Schiff base reaction involving IR780 with amine groups (IR780-NH2) and oxidized sodium alginate with aldehyde groups (OSA). The formation of PEI-CPT/OSA-IR780 hydrogels with various solid contents occurred rapidly within 40 s through a simple mixing process of the aqueous solution of PEI-CPT and OSA-IR780. These hydrogels exhibited remarkable stability under neutral conditions and controlled release of CPT upon exposure to simulated tumor environments characterized by acidic conditions and elevated GSH concentrations. Furthermore, they had significant injectable and self-healing properties due to the dynamically imine-cross-linked networks. In addition, the prepared hydrogels exhibited long-term biodegradability and biocompatibility. Collectively, these features indicate the great potential of PEI-CPT/OSA-IR780 hydrogels as therapeutic delivery vehicles.
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Affiliation(s)
- Benshun Zhu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
| | - Tong Zong
- AECC Beijing Institute of Aeronautical Materials, Beijing 100095, P. R. China
| | - Ruifu Zheng
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
| | - Xing Chen
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
| | - Yakun Zhou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
| | - Yuandong Liu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
| | | | | | - Jun Yin
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
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Chitosan nanocomposite film incorporating Nigella sativa oil, Azadirachta indica leaves’ extract, and silver nanoparticles. E-POLYMERS 2023. [DOI: 10.1515/epoly-2022-8083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Abstract
Nanocomposite films have been prepared from chitosan, cinnamaldehyde, Nigella sativa or blackseed oil, and silver nanoparticles (NPs) biosynthesized in Azadirachta indica or neem leaves’ extract. The methodology involved simple blending of components through “green chemistry” route. The films obtained were soft and foldable. The morphology by scanning electron microscopy confirmed the inclusion of NPs in the films. Microbial penetration study demonstrated that the films offered good resistance to secondary bacterial infection. The antibacterial study against Staphylococcus aureus (ATCC 29213) and E. coli (ATCC 25922) indicated moderate antibacterial behavior of the films. The swelling behavior in water, phosphate buffer saline, and simulated wound fluid was found to be appropriate for use as wound dressings. The films were biodegradable in soil and showed good thermal stability up to 200°C.
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Zha J, Mao X, Hu S, Shang K, Yin J. Acid- and Thiol-Cleavable Multifunctional Codelivery Hydrogel: Fabrication and Investigation of Antimicrobial and Anticancer Properties. ACS APPLIED BIO MATERIALS 2021; 4:1515-1523. [PMID: 35014501 DOI: 10.1021/acsabm.0c01396] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hydrogels serving as a drug carrier was realized by entrapping small-sized drug molecules within their cross-linked interstitial networks. After covering the targeted location, hydrogels interact with the physiological fluids and swell, resulting in an increased interspace between networks for the outside diffusion of drugs. However, inevitable in vivo inflammatory responses or bacterial infection on the implant materials and persistent cargo release are still challenging. Herein, we report the fabrication of dual-responsive hydrogels based on acid-sensitive poly(ethylenimine) (PEI) derivative (PEI(-COOH/-vinyl)), thiol-responsive camptothecin prodrug monomer (CPTM), and hydrophilic oligo(ethylene glycol) methyl ether acrylate (OEGMA) by a conventional radical polymerization. Curcumin was then solubilized into the hydrogels to endow them with antimicrobial and cancer resistance properties. The in vitro experiments exhibited sustained hydrogel dissolution and CPT release in a simulated physiological environment. The antimicrobial and cytotoxicity tests of drug-loaded hydrogels using methicillin-resistant Staphylococcus aureus (MRSA) strains and HeLa cancer cell lines, respectively, indicated that the hydrogels possessed efficient antimicrobial effects and could successfully inhibit the growth of cancer cells.
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Affiliation(s)
- Jiecheng Zha
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, P. R. China
| | - Xiaoxu Mao
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, P. R. China
| | - Shoukui Hu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, P. R. China
| | - Ke Shang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, P. R. China
| | - Jun Yin
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, P. R. China
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Limayem A, Patil SB, Mehta M, Cheng F, Nguyen M. A Streamlined Study on Chitosan-Zinc Oxide Nanomicelle Properties to Mitigate a Drug-Resistant Biofilm Protection Mechanism. FRONTIERS IN NANOTECHNOLOGY 2020. [DOI: 10.3389/fnano.2020.592739] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The nosocomial multidrug resistant bacteria (MDR), are rapidly circulating from water surfaces to humans away from the clinical setting, forming a cyclical breeding ground of resistance, causing worldwide infections, and thus requiring urgent responses. The combination of chitosan and zinc oxide (CZNPs), with proven bactericidal effects on some MDRs, was further studied to set the stage for a broad-spectrum in vivo utilization of CZNPs. Toward ensuring CZNPs' uniformity and potency, when it faces not only biofilms but also their extracellular polymeric substances (EPS) defense mechanism, the size, zeta potential, and polydispersity index (PDI) were determined through dynamic light scattering (DLS). Furthermore, the efficacy of CZNPs was tested on the inhibition of MDR Gram-negative Escherichia coli BAA-2471 and Gram-positive Enterococcus faecium 1449 models, co-cultured in an Alvatex 3D fiber platform as a biofilm-like structure. The Biotek Synergy Neo2 fluorescent microplate reader was used to detect biofilm shrinkage. The biofilm protection mechanism was elucidated through detection of EPS using 3D confocal and transmission electronic microscopy. Results indicated that 200 μl/mL of CZNPs, made with 50 nm ZnO and 10,000 Da chitosan (N = 369.1 nm; PDI = 0.371; zeta potential = 22.8 mV), was the most promising nanocomposite for MDR biofilm reduction, when compared to CZNPs enclosing ZnO, 18 or 100 nm. This study depicts that CZNPs possess enough potency and versatility to face biofilms' defense mechanism in vivo.
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Synthesis and characterization of polyvinyl alcohol/corn starch/linseed polyol-based hydrogel loaded with biosynthesized silver nanoparticles. Int J Biol Macromol 2020; 163:2236-2247. [PMID: 32931835 DOI: 10.1016/j.ijbiomac.2020.09.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 08/28/2020] [Accepted: 09/07/2020] [Indexed: 12/14/2022]
Abstract
Nanocomposite hydrogel film was prepared from Polyvinyl alcohol [PVA], Corn Starch [CS], Linseed oil polyol [LP], and silver nanoparticles [NP]. LP was prepared by epoxidation and hydration of Linseed oil [LO]. IR and NMR supported the insertion of hydroxyl groups in LP by epoxide ring opening reaction at epoxidized LO. Silver NP were biosynthesized using aqueous leaves' extract from locally grown Ocimum forsskaolii Benth [LEO] plant. FTIR, XRD, UV and TEM confirmed the synthesis of NP (size 30 to 39 nm). Transparent and foldable hydrogel film resulted by blending the constituents (PVA, CS, LP and NP), crosslinking by glutaraldehyde, at room temperature, and showed expansion in water, different pH solutions, biodegradation and good antibacterial and antifungal activity against tested microbes. Linseed polyol influenced the structure, morphology, hydrophilicity, improved swelling ability and thermal stability and accelerated biodegradation of hydrogel films. NP were well adhered to LP globules that were embedded in PVA/CS matrix as strung set of beads (LP globules) decorated with black pearls (spherical NP). Silver NP conferred antimicrobial behavior to hydrogel film as observed by antimicrobial screening on different microbes. The results were encouraging and showed that such hydrogel films may find prospective applications in antimicrobial packaging.
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Synthesis and characterization of novel semi-IPN nanocomposite hydrogels based on guar gum, partially hydrolyzed poly(acrylamide), and pristine montmorillonite. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03408-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Singh G, Nayal A, Malhotra S, Koul V. Dual functionalized chitosan based composite hydrogel for haemostatic efficacy and adhesive property. Carbohydr Polym 2020; 247:116757. [PMID: 32829870 DOI: 10.1016/j.carbpol.2020.116757] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 05/28/2020] [Accepted: 07/10/2020] [Indexed: 10/23/2022]
Abstract
The objective of this study was to devise a dual functionalized chitosan based hydrogel dressing to control haemorrhage/ bleeding. The haemostatic hydrogel was formulated by amalgamation of a definite ratio of quaternized chitosan and phosphorylated chitosan along with tannic acid which acted as adjuvant hemostat and a crosslinker. Additionally, the hydrogel contained poly-Ɛ-lysine to impart the elastic and adhesive properties. The optimized hydrogel exhibited superior haemostatic activity (clotting time, 225 ± 5 s), platelet activation (soluble P-selectin concentration 2098 ± 150.19 ng mL-1), adhesion strength (almost 3 times higher in comparison to Axiostat), higher fluid absorption (approx. 14 times in 12 h) in addition to better mechanical properties, faster coagulation attributes (Prothrombin time, 12.6 s and activated partial thromboplastin time, 30.1 s) and lower proinflammatory potential (almost 3 times lower Tumor Necrosis Factor- α levels and 45 times lower InterLeukin-6 levels at 48 h against control) over marketed chitosan based dressing (clotting time, 300 ± 25 s). Cytotoxicity studies using L929 fibroblasts cells and in-vivo studies using Wistar rats confirmed that the optimized hydrogel was non-toxic, cytocompatible and biocompatible.
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Affiliation(s)
- Gopendra Singh
- Centre for Biomedical Engineering, Indian Institute of Technology-Delhi, Hauz Khas, New Delhi, 110016, India; Biomedical Engineering Unit, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
| | - Aradhana Nayal
- Centre for Biomedical Engineering, Indian Institute of Technology-Delhi, Hauz Khas, New Delhi, 110016, India
| | - Sahil Malhotra
- Centre for Biomedical Engineering, Indian Institute of Technology-Delhi, Hauz Khas, New Delhi, 110016, India; Biomedical Engineering Unit, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology-Delhi, Hauz Khas, New Delhi, 110016, India; Biomedical Engineering Unit, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India.
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Vashist A, Atluri V, Raymond A, Kaushik A, Parira T, Huang Z, Durygin A, Tomitaka A, Nikkhah-Moshaie R, Vashist A, Agudelo M, Chand HS, Saytashev I, Ramella-Roman JC, Nair M. Development of Multifunctional Biopolymeric Auto-Fluorescent Micro- and Nanogels as a Platform for Biomedical Applications. Front Bioeng Biotechnol 2020; 8:315. [PMID: 32426338 PMCID: PMC7203429 DOI: 10.3389/fbioe.2020.00315] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Accepted: 03/23/2020] [Indexed: 01/04/2023] Open
Abstract
The emerging field of theranostics for advanced healthcare has raised the demand for effective and safe delivery systems consisting of therapeutics and diagnostics agents in a single monarchy. This requires the development of multi-functional bio-polymeric systems for efficient image-guided therapeutics. This study reports the development of size-controlled (micro-to-nano) auto-fluorescent biopolymeric hydrogel particles of chitosan and hydroxyethyl cellulose (HEC) synthesized using water-in-oil emulsion polymerization technique. Sustainable resource linseed oil-based polyol is introduced as an element of hydrophobicity with an aim to facilitate their ability to traverse the blood-brain barrier (BBB). These nanogels are demonstrated to have salient features such as biocompatibility, stability, high cellular uptake by a variety of host cells, and ability to transmigrate across an in vitro BBB model. Interestingly, these unique nanogel particles exhibited auto-fluorescence at a wide range of wavelengths 450-780 nm on excitation at 405 nm whereas excitation at 710 nm gives emission at 810 nm. In conclusion, this study proposes the developed bio-polymeric fluorescent micro- and nano- gels as a potential theranostic tool for central nervous system (CNS) drug delivery and image-guided therapy.
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Affiliation(s)
- Arti Vashist
- Department of Immunology and Nanomedicine, Center for Personalized Nanomedicine, Herbert Wertheim College of Medicine, Institute of NeuroImmune Pharmacology, Florida International University, Miami, FL, United States
| | - Venkata Atluri
- Department of Immunology and Nanomedicine, Center for Personalized Nanomedicine, Herbert Wertheim College of Medicine, Institute of NeuroImmune Pharmacology, Florida International University, Miami, FL, United States
| | - Andrea Raymond
- Department of Immunology and Nanomedicine, Center for Personalized Nanomedicine, Herbert Wertheim College of Medicine, Institute of NeuroImmune Pharmacology, Florida International University, Miami, FL, United States
| | - Ajeet Kaushik
- Department of Immunology and Nanomedicine, Center for Personalized Nanomedicine, Herbert Wertheim College of Medicine, Institute of NeuroImmune Pharmacology, Florida International University, Miami, FL, United States
- Division of Sciences, Art, and Sciences, Department of Natural Sciences, Florida Polytechnic University, Lakeland, FL, United States
| | - Tiyash Parira
- Department of Immunology and Nanomedicine, Center for Personalized Nanomedicine, Herbert Wertheim College of Medicine, Institute of NeuroImmune Pharmacology, Florida International University, Miami, FL, United States
| | - Zaohua Huang
- Department of Immunology and Nanomedicine, Center for Personalized Nanomedicine, Herbert Wertheim College of Medicine, Institute of NeuroImmune Pharmacology, Florida International University, Miami, FL, United States
- Department of Otolaryngology, University of Miami School of Medicine, Miami, FL, United States
| | - Andriy Durygin
- CeSMEC, Florida International University, Miami, FL, United States
| | - Asahi Tomitaka
- Department of Immunology and Nanomedicine, Center for Personalized Nanomedicine, Herbert Wertheim College of Medicine, Institute of NeuroImmune Pharmacology, Florida International University, Miami, FL, United States
| | - Roozbeh Nikkhah-Moshaie
- Department of Immunology and Nanomedicine, Center for Personalized Nanomedicine, Herbert Wertheim College of Medicine, Institute of NeuroImmune Pharmacology, Florida International University, Miami, FL, United States
| | - Atul Vashist
- Department of Biotechnology, All India Institute of Medical Science, New Delhi, India
| | - Marisela Agudelo
- Department of Immunology and Nanomedicine, Center for Personalized Nanomedicine, Herbert Wertheim College of Medicine, Institute of NeuroImmune Pharmacology, Florida International University, Miami, FL, United States
| | - Hitendra S. Chand
- Department of Immunology and Nanomedicine, Center for Personalized Nanomedicine, Herbert Wertheim College of Medicine, Institute of NeuroImmune Pharmacology, Florida International University, Miami, FL, United States
| | - Ilyas Saytashev
- Department of Biomedical Engineering, Florida International University, Miami, FL, United States
- Department of Cellular Biology, Pharmacology and Ophthalmology, Herbert Wertheim College of Medicine, Miami, FL, United States
| | - Jessica C. Ramella-Roman
- Department of Biomedical Engineering, Florida International University, Miami, FL, United States
- Department of Cellular Biology, Pharmacology and Ophthalmology, Herbert Wertheim College of Medicine, Miami, FL, United States
| | - Madhavan Nair
- Department of Immunology and Nanomedicine, Center for Personalized Nanomedicine, Herbert Wertheim College of Medicine, Institute of NeuroImmune Pharmacology, Florida International University, Miami, FL, United States
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Lu J, Hu J, Zhong Z, Zeng G, Zhou Y, Chen Y. A method to prepare gels with controllable morphology through a three‐phase system. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jiawei Lu
- Hunan Provincial Engineering Laboratory of Key Technique of Non‐metallic Packaging Waste Resources UtilizationHunan University of Technology Zhuzhou China
- Hunan Provincial Key Laboratory of Biomass Fiber Functional MaterialsHunan University of Technology Zhuzhou China
| | - Jiawei Hu
- Hunan Provincial Engineering Laboratory of Key Technique of Non‐metallic Packaging Waste Resources UtilizationHunan University of Technology Zhuzhou China
- Hunan Provincial Key Laboratory of Biomass Fiber Functional MaterialsHunan University of Technology Zhuzhou China
| | - Zhifeng Zhong
- Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, College of Urban and Environmental SciencesHunan University of Technology Zhuzhou China
| | - Guangsheng Zeng
- Hunan Provincial Engineering Laboratory of Key Technique of Non‐metallic Packaging Waste Resources UtilizationHunan University of Technology Zhuzhou China
- Hunan Provincial Key Laboratory of Biomass Fiber Functional MaterialsHunan University of Technology Zhuzhou China
- Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, College of Urban and Environmental SciencesHunan University of Technology Zhuzhou China
| | - Yueyun Zhou
- Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, College of Urban and Environmental SciencesHunan University of Technology Zhuzhou China
| | - Yi Chen
- Hunan Provincial Engineering Laboratory of Key Technique of Non‐metallic Packaging Waste Resources UtilizationHunan University of Technology Zhuzhou China
- Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, College of Urban and Environmental SciencesHunan University of Technology Zhuzhou China
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Vashist A, Ghosal A, Vashist A, Kaushik A, Gupta YK, Nair M, Ahmad S. Impact of Nanoclay on the pH-Responsiveness and Biodegradable Behavior of Biopolymer-Based Nanocomposite Hydrogels. Gels 2019; 5:E44. [PMID: 31623182 PMCID: PMC6955902 DOI: 10.3390/gels5040044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 08/26/2019] [Accepted: 08/30/2019] [Indexed: 01/04/2023] Open
Abstract
This research work deployed free radical polymerization for the development of pH-responsive hybrid nanocomposite hydrogels (NCHs) with the formation of improved interpenetrating networks (IPN). The crosslinked biopolymeric system was composed of (chitosan (CH)/guar gum (GG)/polyol) and a nanofiller (Cloisite 30B). The study was aimed to investigate the role of Cloisite 30B as a nanofiller and linseed oil-derived polyol to induce stable interpenetrating networks in chitosan‒guar gum-based hydrogels. FT-IR analysis confirmed the formation of crosslinked networks with the formation of hydrogen bonds in the synthesized NCHs. Thermogravimetric analysis and differential scanning calorimetry revealed high thermal stability of the NCHs. The hydrolytic and soil burial degradation tests confirmed the biodegradability of the synthesized NCHs. An extraordinarily high swelling capacity in a buffer solution of pH 4.0 and 7.4 demonstrated their pH-responsive behavior. It has been demonstrated that even the minimal addition of polyol to the guar gum-based hydrogels has influenced the stability and characteristic features such as high swelling capacity owing to the formation of interpenetrating networks and the biodegradability of the hydrogels.
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Affiliation(s)
- Arti Vashist
- Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
- Center for Personalized Nanomedicine, Institute of NeuroImmune Pharmacology, Department of Immunology & Nanomedicine, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA.
| | - Anujit Ghosal
- Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
- School of Lifesciences, Beijing Institute of Technology, Beijing 100081, China.
| | - Atul Vashist
- Department of Biotechnology, All India Institute of Medical Sciences, New Delhi 110029, India.
| | - Ajeet Kaushik
- Center for Personalized Nanomedicine, Institute of NeuroImmune Pharmacology, Department of Immunology & Nanomedicine, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA.
- Department of Natural Sciences, Division of Sciences, Art, & Mathematics, Florida Polytechnic University, Lakeland, FL 33805-8531, USA.
| | - Y K Gupta
- Department of Pharmacology, All India Institute of Medical Sciences, New Delhi 110029, India.
| | - Madhavan Nair
- Center for Personalized Nanomedicine, Institute of NeuroImmune Pharmacology, Department of Immunology & Nanomedicine, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA.
| | - Sharif Ahmad
- Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
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Chen Y, Zhou Y, Liu W, Pi H, Zeng G. POSS Hybrid Robust Biomass IPN Hydrogels with Temperature Responsiveness. Polymers (Basel) 2019; 11:E524. [PMID: 30960509 PMCID: PMC6473450 DOI: 10.3390/polym11030524] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/15/2019] [Accepted: 03/15/2019] [Indexed: 11/25/2022] Open
Abstract
In order to improve the performance of traditional sodium alginate (SA) hydrogels cross-linked by Ca2+ ions to meet greater application demand, a strategy was designed to structure novel SA-based gels (named OP-PN gels) to achieve both stimulus responsiveness and improved mechanical strength. In this strategy, the SA chains are co-cross-linked by CaCl₂ and cationic octa-ammonium polyhedral oligomeric silsesquioxane (Oa-POSS) particles as the first network, and an organically cross-linked poly(N-isopropyl acrylamide) (PNIPA) network is introduced into the gels as the second network. Several main results are obtained from the synthesis and characterization of the gels. For OP-PN gels, their properties depend on the content of both uniformly dispersed Oa-POSS and PNIPA network directly. The increased Oa-POSS and PNIPA network content significantly improves both the strength and resilience of gels. Relatively, the increased Oa-POSS is greatly beneficial to the modulus of gels, and the increased PNIPA network is more favorable to advancing the tensile deformation of gels. The gels with hydrophilic PNIPA network exhibit better swelling ability and remarkable temperature responsiveness, and their volume phase transition temperature can be adjusted by altering the content of Oa-POSS. The deswelling rate of gels increases gradually with the increase of POSS content due to the hydrophobic Si⁻O skeleton of POSS. Moreover, the enhanced drug loading and sustained release ability of the target drug bovine serum albumin displays great potential for this hybrid gel in the biomedical field.
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Affiliation(s)
- Yi Chen
- Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, College of Urban and Environmental Sciences, Hunan University of Technology, Zhuzhou 412007, China.
- Hunan Provincial Engineering Laboratory of Key Technique of Non-metallic Packaging Waste Resources Utilization, Hunan University of Technology, Zhuzhou 412007, China.
| | - Yueyun Zhou
- Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, College of Urban and Environmental Sciences, Hunan University of Technology, Zhuzhou 412007, China.
| | - Wenyong Liu
- Hunan Provincial Engineering Laboratory of Key Technique of Non-metallic Packaging Waste Resources Utilization, Hunan University of Technology, Zhuzhou 412007, China.
- Hunan Provincial Key Laboratory of Biomass Fiber Functional Materials, Hunan University of Technology, Zhuzhou 412007, China.
| | - Hejie Pi
- Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, College of Urban and Environmental Sciences, Hunan University of Technology, Zhuzhou 412007, China.
| | - Guangsheng Zeng
- Hunan Provincial Engineering Laboratory of Key Technique of Non-metallic Packaging Waste Resources Utilization, Hunan University of Technology, Zhuzhou 412007, China.
- Hunan Provincial Key Laboratory of Biomass Fiber Functional Materials, Hunan University of Technology, Zhuzhou 412007, China.
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Mohammed IA, Shahabuddin S, Khanam R, Saidur R. Synthesis, characterization and antibacterial activity of novel poly(silyl ether)s based on palm and soy oils. POLIMEROS 2018. [DOI: 10.1590/0104-1428.10317] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Kouser R, Vashist A, Zafaryab M, Rizvi MA, Ahmad S. Na-Montmorillonite-Dispersed Sustainable Polymer Nanocomposite Hydrogel Films for Anticancer Drug Delivery. ACS OMEGA 2018; 3:15809-15820. [PMID: 30556014 PMCID: PMC6288778 DOI: 10.1021/acsomega.8b01691] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 10/19/2018] [Indexed: 05/17/2023]
Abstract
Nanocomposite hydrogels have found a wide scope in regenerative medicine, tissue engineering, and smart drug delivery applications. The present study reports the formulations of biocompatible nanocomposite hydrogel films using carboxymethyl cellulose-hydroxyethyl cellulose-acrylonitrile-linseed oil polyol (CHAP) plain hydrogel and Na-montmorillonite (NaMMT) dispersed CHAP nanocomposite hydrogel films (NaCHAP) using solution blending technique. The structural, morphological, and mechanical properties of resultant nanocomposite hydrogel films were further investigated to analyze the effects of polyol and NaMMT on the characteristic properties. The synergistic effect of polyol and nanofillers on the mechanical strength and sustained drug-release behavior of the resultant hydrogel films was studied, which revealed that the increased cross-link density of hydrogels enhanced the elastic modulus (up to 99%) and improved the drug retention time (up to 72 h at both pHs 7.4 and 4.0). The release rate of cisplatin in nanocomposite hydrogel films was found to be higher in CHAP-1 (83 and 69%) and CHAP-3 (79 and 64%) than NaCHAP-3 (77 and 57%) and NaCHAP-4 (73 and 54%) at both pHs 4.0 and 7.4, respectively. These data confirmed that the release rate of cisplatin in nanocomposite hydrogel films was pH-responsive and increased with decrease of pH. All nanocomposite hydrogel films have exhibited excellent pH sensitivity under buffer solution of various pHs (1.0, 4.0, 7.4, and 9.0). The in vitro biocompatibility and cytotoxicity tests of these films were also conducted using 3-(4,5-dimethylthiazole-2-yl-2,5-diphenyl tetrazolium bromide) assay of human embryonic kidney (HEK-293) and human breast cancer (MCF-7) cell lines up to 48 h, which shows their biocompatible nature. However, cisplatin-loaded nanocomposite hydrogel films effectively inhibited the growth of human breast MCF-7 cancer cells. These studies suggested that the proposed nanocomposite hydrogel films have shown promising application in therapeutics, especially for anticancer-targeted drug delivery.
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Affiliation(s)
- Rabia Kouser
- Material
Research Laboratory, Department of Chemistry and Genome Biology
Lab, Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Arti Vashist
- Material
Research Laboratory, Department of Chemistry and Genome Biology
Lab, Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India
- Department
of Immunology, Center of Personalized Nanomedicine, Institute of NeuroImmune
Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Miami, Florida 33199, United States
| | - Md. Zafaryab
- Material
Research Laboratory, Department of Chemistry and Genome Biology
Lab, Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Moshahid A. Rizvi
- Material
Research Laboratory, Department of Chemistry and Genome Biology
Lab, Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Sharif Ahmad
- Material
Research Laboratory, Department of Chemistry and Genome Biology
Lab, Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India
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Kouser R, Vashist A, Zafaryab M, Rizvi MA, Ahmad S. pH-Responsive Biocompatible Nanocomposite Hydrogels for Therapeutic Drug Delivery. ACS APPLIED BIO MATERIALS 2018; 1:1810-1822. [DOI: 10.1021/acsabm.8b00260] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Rabia Kouser
- Material Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
| | - Arti Vashist
- Material Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
- Center of Personalized Nanomedicine, Institute of NeuroImmune Pharmacology, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, Florida 33199, United States
| | - Mohammed Zafaryab
- Genome Biology Laboratory, Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Moshahid A. Rizvi
- Genome Biology Laboratory, Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Sharif Ahmad
- Material Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
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15
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Bankoti K, Rameshbabu AP, Datta S, Maity PP, Goswami P, Datta P, Ghosh SK, Mitra A, Dhara S. Accelerated healing of full thickness dermal wounds by macroporous waterborne polyurethane-chitosan hydrogel scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 81:133-143. [DOI: 10.1016/j.msec.2017.07.018] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 06/06/2017] [Accepted: 07/13/2017] [Indexed: 12/21/2022]
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16
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Kouser R, Vashist A, Zafaryab M, Rizvi MA, Ahmad S. Biocompatible and mechanically robust nanocomposite hydrogels for potential applications in tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017. [PMID: 29519426 DOI: 10.1016/j.msec.2017.11.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The synergistic contributions of nanofillers and polymer matrix induce remarkable properties in nanocomposite hydrogels. Present article reports the facile synthesis of biocompatible nanocomposite hydrogels using microporous multi wall carbon nanotubes (MWCNTs) dispersed chitosan (CH)-Acrylonitrile (AN), N,N'-methylenebisacrylamide (MBAAm) and linseed polyol through solution blending method. Polyol and N,N'-methylenebisacrylamide (MBAAm) was used as the crosslinking agent. The structural characterization and formation of highly crosslinked network with dendrimer morphology was confirmed by FT-IR and scanning electron microscope (SEM) analysis. In addition, transmission electron microscope (TEM) was employed to visualize the size and proper dispersion of MWCNT in the polymer matrices. The strong mechanical strength exhibited by these hydrogel films was confirmed by the tensile strength analysis. The dispersion of the conductive nanofillers, like MWCNTs has significantly enhanced the strength, which revealed unique characteristics of these hydrogel films. The high swelling capacity and sustained expansion of hydrogel films were confirmed in the buffer solutions of pH4 and 7.4. The biodegradability of these films was estimated by hydrolytic and soil burial tests. The biocompatibility test was conducted on Human Embryonic Kidney (HEK-293) cell line, which confirmed the non-toxic and biocompatible nature of these films. Incorporation of carbon nanotubes (MWCNTs) in the polymer matrix enhanced the film forming properties, high modulus and tensile strength, swelling ability, biodegradable and biocompatibility. These properties can be finely tuned through the variation of MWCNT concentrations, as a result these nanostructure hydrogel films have potential scope for their diverse applications in the field of tissue engineering.
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Affiliation(s)
- Rabia Kouser
- Material Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
| | - Arti Vashist
- Material Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India; Center of Personalized Nanomedicine, Institute of NeuroImmune Pharmacology, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami FL-33199, USA
| | - Md Zafaryab
- Genome Biology Lab., Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Moshahid A Rizvi
- Genome Biology Lab., Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Sharif Ahmad
- Material Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
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17
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Inhibitory growth evaluation and apoptosis induction in MCF-7 cancer cells by new 5-aryl-2-butylthio-1,3,4-oxadiazole derivatives. Cancer Chemother Pharmacol 2017; 80:1027-1042. [DOI: 10.1007/s00280-017-3414-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 08/03/2017] [Indexed: 12/15/2022]
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18
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Vivek B, Prasad E. Reusable Self-Healing Hydrogels Realized via in Situ Polymerization. J Phys Chem B 2015; 119:4881-7. [DOI: 10.1021/jp511781e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Balachandran Vivek
- Department of Chemistry, Indian Institute of Technology Madras (IIT M), Chennai 600 036, India
| | - Edamana Prasad
- Department of Chemistry, Indian Institute of Technology Madras (IIT M), Chennai 600 036, India
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19
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Sharmin E, Rahman OU, Zafar F, Akram D, Alam M, Ahmad S. Linseed oil polyol/ZnO bionanocomposite towards mechanically robust, thermally stable, hydrophobic coatings: a novel synergistic approach utilising a sustainable resource. RSC Adv 2015. [DOI: 10.1039/c5ra03262h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Linseed polyol/ZnO bionanocomposite produced strong, well-adherent, flexibility-retentive, thermally stable, hydrophobic, “green” corrosion protective coatings via an in situ solventless “green” approach.
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Affiliation(s)
- Eram Sharmin
- Materials Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia (A Central University)
- New Delhi 110 025
- India
| | - Obaid ur Rahman
- Materials Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia (A Central University)
- New Delhi 110 025
- India
| | - Fahmina Zafar
- Materials Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia (A Central University)
- New Delhi 110 025
- India
| | - Deewan Akram
- Materials Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia (A Central University)
- New Delhi 110 025
- India
| | - Manawwer Alam
- Research Centre-College of Science
- King Saud University
- Riyadh 11451
- Saudi Arabia
| | - Sharif Ahmad
- Materials Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia (A Central University)
- New Delhi 110 025
- India
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20
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Li Z, Su Y, Xie B, Liu X, Gao X, Wang D. A novel biocompatible double network hydrogel consisting of konjac glucomannan with high mechanical strength and ability to be freely shaped. J Mater Chem B 2015; 3:1769-1778. [DOI: 10.1039/c4tb01653j] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel physically linked double-network (DN) hydrogel was prepared by natural polymer KGM and synthetic polymer PAAm. The DN hydrogels exhibit good mechanical properties, cell adhesion properties, and can be freely shaped, making such hydrogels promising for tissue engineering scaffolds.
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Affiliation(s)
- Zhiyong Li
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Yunlan Su
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Baoquan Xie
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Xianggui Liu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Xia Gao
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Dujin Wang
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
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21
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22
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Kiran K, Goswami S. PMMA/PHEA Interpenetrating Network Embedded With Iron Oxide Nanoparticles for Drug Delivery Applications. INT J POLYM MATER PO 2014. [DOI: 10.1080/00914037.2014.886235] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Hu X, Feng L, Xie A, Wei W, Wang S, Zhang J, Dong W. Synthesis and characterization of a novel hydrogel: salecan/polyacrylamide semi-IPN hydrogel with a desirable pore structure. J Mater Chem B 2014; 2:3646-3658. [PMID: 32263801 DOI: 10.1039/c3tb21711f] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Salecan is a novel water-soluble β-glucan produced by a salt-tolerant strain Agrobacterium sp. ZX09 which was isolated from a soil sample in our laboratory and the 16S rDNA sequence of this novel strain was deposited in the GenBank database under the accession number GU810841. Salecan has excellent physicochemical properties and can be used in industries such as food and medicine. In this paper, novel semi-interpenetrating polymer network (semi-IPN) hydrogels based on salecan and polyacrylamide (PAAm) were synthesized by radical polymerization/cryopolymerization and semi-IPN techniques. The resulting hydrogels with different salecan/PAAm composition ratios and preparation temperatures were characterized using FTIR, XRD, TGA and SEM measurements. The semi-IPNs exhibited a homogeneous porous architecture with a tunable pore size in a very broad range of 5-150 μm. Furthermore, swelling behaviors of the hydrogels were also studied to investigate the response properties of the hydrogels. The hydrogels obtained at subzero temperature can attain the equilibrium state in water within 260 seconds. Mechanical measurements showed that all semi-IPNs possessed good mechanical properties. In vitro degradation was also studied in PBS solution. Cytotoxicity results suggested that semi-IPN hydrogels were non-toxic to COS-7 cells. A cell culture experiment performed using COS-7 cells revealed their appropriateness for cell adhesion. Together, these results make salecan/PAAm semi-IPNs promising materials for biomedical applications.
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Affiliation(s)
- Xinyu Hu
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing 210094, China.
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24
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Xie P, Liu X, Cheng R, Wu Y, Deng J. pH-Sensitive Chiral Hydrogels Consisting of Poly(N-acryloyl-l-alanine) and β-Cyclodextrin: Preparation and Enantiodifferentiating Adsorption and Release Ability. Ind Eng Chem Res 2014. [DOI: 10.1021/ie500538x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Peng Xie
- State Key Laboratory of Organic−Inorganic
Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xuan Liu
- State Key Laboratory of Organic−Inorganic
Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Ru Cheng
- State Key Laboratory of Organic−Inorganic
Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Youping Wu
- State Key Laboratory of Organic−Inorganic
Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jianping Deng
- State
Key Laboratory of Chemical Resource Engineering, College of Materials
Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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25
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Halacheva SS, Adlam DJ, Hendow EK, Freemont TJ, Hoyland J, Saunders BR. Injectable biocompatible and biodegradable pH-responsive hollow particle gels containing poly(acrylic acid): the effect of copolymer composition on gel properties. Biomacromolecules 2014; 15:1814-27. [PMID: 24684558 DOI: 10.1021/bm5002069] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The potential of various pH-responsive alkyl (meth)acrylate ester- and (meth)acrylic acid-based copolymers, including poly(methyl methacrylate-co-acrylic acid) (PMMA-AA) and poly(n-butyl acrylate-co-methacrylic acid) (PBA-MAA), to form pH-sensitive biocompatible and biodegradable hollow particle gel scaffolds for use in non-load-bearing soft tissue regeneration have been explored. The optimal copolymer design criteria for preparation of these materials have been established. Physical gels which are both pH- and redox-sensitive were formed only from PMMA-AA copolymers. MMA is the optimal hydrophobic monomer, whereas the use of various COOH-containing monomers, e.g., MAA and AA, will always induce a pH-triggered physical gelation. The PMMA-AA gels were prepared at physiological pH range from concentrated dispersions of swollen, hollow, polymer-based particles cross-linked with either cystamine (CYS) or 3,3'-dithiodipropionic acid dihydrazide (DTP). A linear relationship between particle swelling ratios, gel elasticity, and ductility was observed. The PMMA-AA gels with lower AA contents feature lower swelling ratios, mechanical strengths, and ductilities. Increasing the swelling ratio (e.g., through increasing AA content) decreased the intraparticle elasticity; however, intershell contact and gel elasticity were found to increase. The mechanical properties and performance of the gels were tuneable upon varying the copolymers' compositions and the structure of the cross-linker. Compared to PMMA-AA/CYS, the PMMA-AA/DTP gels were more elastic and ductile. The biodegradability and cytotoxicity of the new hollow particle gels were tested for the first time and related to their composition, mechanical properties, and morphology. The new PMMA-AA/CYS and PMMA-AA/DTP gels have shown good biocompatibility, biodegradability, strength, and interconnected porosity and therefore have good potential as a tissue repair agent.
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Affiliation(s)
- Silvia S Halacheva
- Institute for Materials Research and Innovation, University of Bolton , Deane Road, Bolton, Greater Manchester, BL3 5AB, United Kingdom
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26
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Vashist A, Vashist A, Gupta YK, Ahmad S. Recent advances in hydrogel based drug delivery systems for the human body. J Mater Chem B 2014; 2:147-166. [DOI: 10.1039/c3tb21016b] [Citation(s) in RCA: 320] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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27
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Halacheva SS, Freemont TJ, Saunders BR. pH-responsive physical gels from poly(meth)acrylic acid-containing crosslinked particles: the relationship between structure and mechanical properties. J Mater Chem B 2013; 1:4065-4078. [PMID: 32260959 DOI: 10.1039/c3tb20758g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gels that feature high internal porosity and have both high elasticity and ductility have potential to provide immediate load support and enable subsequent tissue regeneration of damaged soft tissue if combined with cells. Herein, we report results from a recent investigation of novel poly(methyl methacrylate-co-methacrylic acid), (PMMA-MAA) and poly(ethyl acrylate-co-methacrylic acid), (PEA-MAA) biodegradable, pH-sensitive particle gels which are with high porosity, elasticity and ductility. These gels formed at physiological pH range and are potentially injectable. The particles were prepared using solvent evaporation. They were functionalized by crosslinking the MAA groups of the particles via bis-amide formation with either cystamine (CYS) or 3,3'-dithiodipropionic acid dihydrazide (DTP) which simultaneously incorporated reversibility due to the presence of disulphide bonds within the crosslinker. The crosslinked particles were observed by dynamic light scattering to swell appreciably in size upon increasing the pH. Concentrated dispersions formed elastic and ductile physical gels within the physiological pH range. A key finding of this study was that for crosslinked particles of similar composition the formation of considerably more elastic and ductile gels was observed from the most lightly crosslinked particles. Furthermore, compared to the PMMA-MAA/CYS and PEA-MAA/CYS gels, those formed from DTP-crosslinked particles had higher elasticity, thicker pore walls and improved interconnectivity. For the PMMA-MAA/DTP gels an elastic modulus value as high as 100 kPa and a yield strain greater than 100% were observed for a gel containing only 5 wt% of particles. The improved mechanical properties of these new gel-forming dispersions imply that they now have good potential for future application as injectable gels for regenerative medicine.
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Affiliation(s)
- Silvia S Halacheva
- University of Manchester, Materials Science Centre, Grosvenor Street, Manchester, M1 7HS, UK.
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28
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Guo M, Muhammad F, Wang A, Qi W, Wang N, Guo Y, Wei Y, Zhu G. Magnesium hydroxide nanoplates: a pH-responsive platform for hydrophobic anticancer drug delivery. J Mater Chem B 2013; 1:5273-5278. [DOI: 10.1039/c3tb20466a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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