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Self-healing, antibacterial, and conductive double network hydrogel for strain sensors. Carbohydr Polym 2023; 303:120468. [PMID: 36657864 DOI: 10.1016/j.carbpol.2022.120468] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 12/09/2022] [Accepted: 12/11/2022] [Indexed: 12/23/2022]
Abstract
Multifunctional hydrogels have great potential in smart wearable technology, flexible electronic devices, and biomedical research. However, it is highly challenging to prepare unique conductive hydrogels with combined properties such as self-healing, self-adhesive, and antibacterial activity. In this regard, herein, a conductive double network hydrogel (ACBt-PAA/CMCs) was fabricated using carboxymethyl chitosan (CMCs), acrylic acid (AA), and alkaline calcium bentonite (ACBt) via a convenient approach. Owing to the hydrogen bond interaction between PAA and CMCs, the ACBt-PAA/CMCs double network structured hydrogels exhibited excellent self-healing (the tensile strength recovered to 74.3 % after 1 h) and adjustable mechanical properties, in which the fracture stress and strain can be easily adjusted in the range of 0.039 to 0.93 MPa and 564 to 2900 %, respectively. In addition, the ACBt-PAA/CMCs hydrogels exhibited the remarkable antibacterial activities against Escherichia coli (bacterial inhibition efficiency of ~99.99 %) and Staphylococcus aureus (bacterial inhibition efficiency of ~99.98 %). Furthermore, the ACBt-PAA/CMCs hydrogel based wearable skin exhibited an excellent real-time sensing performance for monitoring various motions, signifying outstanding sensing and self-adhesion properties. Considering the unique features such as self-healing, excellent adhesion, highly active strain sensing, and antibacterial activities making the ACBt-PAA/CMCs hydrogel is an excellent multifunctional conductive hydrogel. Hence, we believe that this proposed design method for the fabrication of smart and multifunctional conductive hydrogels, and this ACBt-PAA/CMCs hydrogel could be a promising candidate for flexible wearable materials, health monitoring, and beyond.
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Mahmood A, Mahmood A, Sarfraz RM, Ijaz H, Zafar N, Ashraf MU. Hydrogel-based intelligent delivery system for controlled release of diloxanide furoate. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04401-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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3
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Ahmad A, Ahmad M, Minhas MU, Sarfraz M, Sohail M, Khan KU, Tanveer S, Ijaz S. Synthesis and Evaluation of Finasteride-Loaded HPMC-Based Nanogels for Transdermal Delivery: A Versatile Nanoscopic Platform. BIOMED RESEARCH INTERNATIONAL 2022; 2022:2426960. [PMID: 35909483 PMCID: PMC9325624 DOI: 10.1155/2022/2426960] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/18/2022] [Accepted: 06/22/2022] [Indexed: 11/18/2022]
Abstract
Herein, we report nanogels comprising diverse feed ratio of polymer hydroxypropyl methylcellulose (HPMC), monomer acrylic acid (AA), and cross-linker methylene bisacrylamide (MBA) fabricated for transdermal delivery of finasteride (FIN). Free radical solution polymerization method with subsequent condensation was employed for the synthesis using ammonium per sulfate (APS) and sodium hydrogen sulfite (SHS) as initiators. Carbopol-940 gel (CG) was formulated as assisting platform to deliver FIN nanogels transdermally. Developed formulations were evaluated by several in vitro, ex vivo, and in vivo parameters such as particle size and charge distribution analysis, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), X-ray diffractogram (XRD), rheological testing, in vitro swelling and drug release, and ex vivo skin permeation, irritation, and toxicity assessment. The results endorsed the nanogel formation (117.3 ± 29.113 nm), and the impact of synthesizing method was signified by high yield of nanogels (≈91%). Efficient response for in vitro swelling and FIN release was revealed at pH 5.5 and 7.4. Skin irritation and toxicity assessment ensured the biocompatibility of prepared nanocomposites. On the basis of the results obtained, it can be concluded that the developed nanogels were stable with excellent drug permeation profile across skin.
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Affiliation(s)
- Aousaf Ahmad
- Department of Pharmaceutics, Faculty of Pharmacy, The Islamia University of Bahawalpur, 63100 Punjab, Pakistan
- Quaid-e-Azam College of Pharmacy, Sahiwal, Punjab, Pakistan
| | - Mahmood Ahmad
- Department of Pharmaceutics, Faculty of Pharmacy, The Islamia University of Bahawalpur, 63100 Punjab, Pakistan
| | - Muhammad Usman Minhas
- College of Pharmacy, University of Sargodha, University Road Sargodha City, Punjab, Pakistan
| | - Muhammad Sarfraz
- College of Pharmacy Al Ain University, Al Ain Campus, Al Ain, UAE
| | - Muhammad Sohail
- Department of Pharmacy, COMSATS Institute of Information Technology, Abbottabad, 22060 KPK, Pakistan
| | | | - Sana Tanveer
- Department of Pharmaceutics, Faculty of Pharmacy, The Islamia University of Bahawalpur, 63100 Punjab, Pakistan
| | - Shakeel Ijaz
- Department of Pharmaceutics, Faculty of Pharmacy, The Islamia University of Bahawalpur, 63100 Punjab, Pakistan
- Quaid-e-Azam College of Pharmacy, Sahiwal, Punjab, Pakistan
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Designing gelatin-based swellable hydrogels system for controlled delivery of salbutamol sulphate: characterization and toxicity evaluation. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03629-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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5
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Lima ADF, Pegorin GS, Miranda MCR, Cachaneski-Lopes JP, Silva WDM, Borges FA, Guerra NB, Herculano RD, Batagin-Neto A. Ibuprofen-loaded biocompatible latex membrane for drug release: Characterization and molecular modeling. J Appl Biomater Funct Mater 2021; 19:22808000211005383. [PMID: 33781110 DOI: 10.1177/22808000211005383] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The incorporation of drugs and bioactive compounds in the natural rubber latex (NRL) matrix has been an alternative for the development of transdermal release membranes. Ibuprofen (IBF) is known to be used to treat inflammatory diseases, but when administered orally, high concentrations can cause some adverse problems. In this work, the incorporation of IBF in the NRL membranes was evaluated by physical-chemical, in vitro permeation, hemocompatibility and molecular modeling assays. In addition, the in vitro release profile of IBF in acid and basic media was analyzed during 96 h. The IBF-NRL membrane exhibited the absence of intermolecular bonding that could hinder drug release and presented compatible mechanical properties for applications as a cutaneous adhesive (0.58 and 1.12 MPa to Young's modulus and rupture tension, respectively). The IBF-NRL system did not present a significant hemolysis degree (1.67%) within 24 h. The release test indicated that in the first hours of the study, 48.5% IBF was released at basic pH and 22.5% at acidic pH, which is characteristic of a burst effect. Then, a stable release profile was observed until the end of the assay, with total IBF release of 60% in alkaline medium and 50% in acidic medium. The drug permeation results indicated that the IBF-NRL membranes can be used for the local skin treatment with permeation of 3.11% of IBF. Dynamic Molecular simulations indicated a pronounced electric dipole in the ionized form of IBF, which suggests a more effective interaction with water, explaining the efficient drug release in alkaline solutions. In general, the results demonstrate that the IBF-NRL membrane has great potential for a new adhesive that can be used for the treatment of inflammatory processes and injuries.
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Affiliation(s)
- Aline de Freitas Lima
- Department of Biotechnology and Bioprocesses Engineering, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil
| | - Giovana Sant'Ana Pegorin
- Department of Biotechnology and Bioprocesses Engineering, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil.,Department of Biochemistry and Chemical Technology, Institute of Chemistry, São Paulo State University (UNESP), Araraquara, Brazil
| | | | - João Paulo Cachaneski-Lopes
- School of Sciences, Post-Graduate Program in Science and Technology of Materials (POSMAT), São Paulo State University (UNESP), Bauru, Brazil
| | - William de Melo Silva
- Department of Bioprocess and Biotechnology, Institute of Biotechnology (IBTEC), São Paulo State University (UNESP), Botucatu, Brazil
| | - Felipe Azevedo Borges
- Department of Biotechnology and Bioprocesses Engineering, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil
| | - Nayrim Brizuela Guerra
- Department of Exact Sciences and Engineering, University of Caxias do Sul (UCS), Caxias do Sul, Brazil
| | - Rondinelli Donizetti Herculano
- Department of Biotechnology and Bioprocesses Engineering, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil
| | - Augusto Batagin-Neto
- Department of Biotechnology and Bioprocesses Engineering, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil.,São Paulo State University (UNESP), Campus of Itapeva, Itapeva, Brazil
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Garcia MAVT, Garcia CF, Faraco AAG. Pharmaceutical and Biomedical Applications of Native and Modified Starch: A Review. STARCH-STARKE 2020. [DOI: 10.1002/star.201900270] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Maria Aparecida Vieira Teixeira Garcia
- Departamento de Alimentos, Faculdade de Farmácia/UFMG Av. Presidente Antônio Carlos, 6627 ‐ Campus Pampulha ‐ CEP 31270‐901 Belo Horizonte ‐ MG ‐ Brasil Brazil
| | - Cleverson Fernando Garcia
- Departamento de QuímicaCentro Federal de Educação Tecnológica de Minas Gerais (CEFET‐MG) Av. Amazonas, 5.253, Nova Suiça. CEP 30421‐169. Belo Horizonte ‐ MG ‐ Brasil Brazil
| | - André Augusto Gomes Faraco
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia/UFMGAv. Presidente Antônio Carlos, 6627 ‐ Campus Pampulha ‐ CEP 31270‐901 Belo Horizonte ‐ MG ‐ Brasil Brazil
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Zhang S, Xing M, Li B. Recent advances in musculoskeletal local drug delivery. Acta Biomater 2019; 93:135-151. [PMID: 30685475 PMCID: PMC6615977 DOI: 10.1016/j.actbio.2019.01.043] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 12/18/2018] [Accepted: 01/22/2019] [Indexed: 12/17/2022]
Abstract
Musculoskeletal disorders are a significant burden on the global economy and public health. Advanced drug delivery plays a key role in the musculoskeletal field and holds the promise of enhancing the repair of degenerated and injured musculoskeletal tissues. Ideally, drug delivery should have the ability to directly deliver therapeutic agents to the diseased/injured sites with a desirable drug level over a period of time. Here, we present a mini-review of the current state-of-the-art research associated with local drug delivery and its use for the treatment of musculoskeletal disorders. First, an overview of drug delivery strategies, with a focus on issues related to musculoskeletal pathology, potential therapeutic strategies, conventional and non-conventional drugs, and various delivery systems, is introduced. Then, we highlight recent advances in the emerging fields of musculoskeletal local drug delivery, involving therapeutic drugs (e.g., genes, small molecule therapeutics, and stem cells), novel delivery vehicles (e.g., 3D printing and tissue engineering techniques), and innovative delivery approaches (e.g., multi-drug delivery and smart stimuli-responsive delivery). The review concludes with future perspectives and associated challenges for developing local drug delivery for musculoskeletal applications. STATEMENT OF SIGNIFICANCE: Three important aspects are highlighted in this manuscript: 1) The advanced musculoskeletal drug delivery is introduced from the aspects ranging from musculoskeletal disorders, potential therapeutic solutions, and various drug delivery systems. 2) The recent advances in the emerging fields of musculoskeletal local drug delivery, involving therapeutic drugs (e.g., genes, small molecule therapeutics, and stem cells), novel delivery vehicles (e.g., 3D printing and tissue engineering technique), and innovative delivery approaches (e.g., multi-drug delivery and smart stimuli-responsive delivery), are highlighted. 3) The challenges and perspectives of future research directions in the development of musculoskeletal local drug delivery are presented.
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Affiliation(s)
- Shichao Zhang
- Department of Orthopaedics, School of Medicine, West Virginia University, Morgantown, WV 26506-9196, United States
| | - Malcolm Xing
- Department of Mechanical Engineering, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Bingyun Li
- Department of Orthopaedics, School of Medicine, West Virginia University, Morgantown, WV 26506-9196, United States.
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Highly Porous pH-Responsive Carboxymethyl Chitosan-Grafted-Poly (Acrylic Acid) Based Smart Hydrogels for 5-Fluorouracil Controlled Delivery and Colon Targeting. INT J POLYM SCI 2019. [DOI: 10.1155/2019/6579239] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
In the present investigation, new formulations of CMCS/AA hydrogels with varying composition of Carboxymethyl chitosan, acrylic acid, and ethylene glycol dimethacrylate (EGDMA) were prepared by free radical polymerization technique using benzoyl peroxide as catalyst. The bioavailability of 5-FU through the oral route is very limited owing to its rapid metabolism and clearance from the general circulation. Current work was aimed at increasing the bioavailability of 5-FU via smart hydrogels and at investigating their potential in delivering 5-FU to target colon cancer. Swelling studies were carried out on dried hydrogel discs in different USP phosphate buffer solutions of various pH values. Porosity and gel fraction of all the samples were measured. 5-FU was used as a model drug and loaded in selected hydrogel samples. The amount of drug loaded and released was determined. Experimental data was fitted to various model equations, and corresponding parameters were calculated to study the release mechanism. Many structural parameters were calculated. The prepared hydrogels were also characterized by FTIR and SEM to study the structure, crystallinity, compatibility, and morphology of the smart hydrogels. The biocompatibility and cytotoxic potential blank and drug-loaded hydrogels were assessed through MTT assay. The prepared hydrogels were found to be an excellent carrier for 5-FU in targeting colon cancer.
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Ghorbani S, Eyni H, Bazaz SR, Nazari H, Asl LS, Zaferani H, Kiani V, Mehrizi AA, Soleimani M. Hydrogels Based on Cellulose and its Derivatives: Applications, Synthesis, and Characteristics. POLYMER SCIENCE SERIES A 2019. [DOI: 10.1134/s0965545x18060044] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Synthesis and Effect of Structure on Swelling Properties of Hydrogels Based on High Methylated Pectin and Acrylic Polymers. Polymers (Basel) 2019; 11:polym11010114. [PMID: 30960098 PMCID: PMC6401908 DOI: 10.3390/polym11010114] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/07/2019] [Accepted: 01/07/2019] [Indexed: 11/25/2022] Open
Abstract
The aim of the research was to develop new pectin-based hydrogels with excellent swelling properties. Superabsorbent hydrogels composed of high methylated pectin and partially neutralized poly(acrylic acid) was obtained by free radical polymerization in aqueous solution in the presence of crosslinking agent—N,N’-methylenebisacrylamide. The effect of crosslinker content and pectin to acrylic acid ratio on the swelling properties of hydrogels was investigated. In addition, the thermodynamic characteristic of hydrogels was obtained by DSC. Furthermore, the structure of pectin-based hydrogels was characterized by FTIR and GPC. It was also proved that poly(acrylic acid) is grafted on pectin particles. The results showed that introduction of small amount of pectin (up to 6.7 wt %) to poly(acrylic acid) hydrogel increase the swelling capacity, while further increasing of pectin ratio cause decrease of swelling.
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Banerjee SL, Swift T, Hoskins R, Rimmer S, Singha NK. A muscle mimetic polyelectrolyte–nanoclay organic–inorganic hybrid hydrogel: its self-healing, shape-memory and actuation properties. J Mater Chem B 2019; 7:1475-1493. [DOI: 10.1039/c8tb02852d] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In this investigation, we report a non-covalent (ionic interlocking and hydrogen bonding) strategy of self-healing in a covalently crosslinked organic–inorganic hybrid nanocomposite hydrogel, with specific emphasis on tuning its properties fitting into a muscle mimetic material.
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Affiliation(s)
| | - Thomas Swift
- School of Chemistry and Biosciences
- University of Bradford
- Bradford
- UK
| | - Richard Hoskins
- School of Chemistry and Biosciences
- University of Bradford
- Bradford
- UK
| | - Stephen Rimmer
- School of Chemistry and Biosciences
- University of Bradford
- Bradford
- UK
| | - Nikhil K. Singha
- Rubber Technology Centre
- Indian Institute of Technology
- Kharagpur
- India
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13
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Yang L, Wang T. Preparation of cellulosic drug-loaded hydrogel beads through electrostatic and host-guest interactions. J Appl Polym Sci 2018. [DOI: 10.1002/app.46593] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Li Yang
- Department of Chemistry, College of Science; Northeast Forestry University; Harbin 150040 People's Republic of China
| | - Ting Wang
- Department of Chemistry, College of Science; Northeast Forestry University; Harbin 150040 People's Republic of China
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Ijaz QA, Abbas N, Arshad MS, Hussain A, Shahiq-uz-Zaman, Javaid Z. Synthesis and evaluation of pH dependent polyethylene glycol- co -acrylic acid hydrogels for controlled release of venlafaxine HCl. J Drug Deliv Sci Technol 2018. [DOI: 10.1016/j.jddst.2017.10.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Naeem F, Khan S, Jalil A, Ranjha NM, Riaz A, Haider MS, Sarwar S, Saher F, Afzal S. pH responsive cross-linked polymeric matrices based on natural polymers: effect of process variables on swelling characterization and drug delivery properties. BIOIMPACTS : BI 2017; 7:177-192. [PMID: 29159145 PMCID: PMC5684509 DOI: 10.15171/bi.2017.21] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Revised: 07/15/2017] [Accepted: 07/16/2017] [Indexed: 01/29/2023]
Abstract
Introduction: The current work was aimed to design and synthesize novel crosslinked pH-sensitive gelatin/pectin (Ge/Pec) hydrogels using different polymeric ratios and to explore the effect of polymers and degree of crosslinking on dynamic, equilibrium swelling and in vitro release behavior of the model drug (Mannitol). Methods: The Ge/Pec based hydrogels were prepared using glutaraldehyde as the crosslinker. Various structural parameters that affect their release behavior were determined, including swelling study, porosity, sol-gel analysis, average molecular weight between crosslinks (Mc), volume fraction of polymer (V2,s), solvent interaction parameter (χ) and diffusion coefficient. The synthesized hydrogels were subjected to various characterization tools like Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and DSC differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). Results: The hydrogels show highest water uptake and release at lower pH values. The FTIR spectra showed an interaction between Ge and Pec, and the drug-loaded samples also showed the drug-related peaks, indicating proper loading of the drug. DSC and TGA studies confirmed the thermal stability of hydrogel samples, while SEM showed the porous nature of hydrogels. The drug release followed non-Fickian diffusion or anomalous mechanism. Conclusion: Aforementioned characterizations reveal the successful formation of copolymer hydrogels. The pH-sensitive swelling ability and drug release behavior suggest that the rate of polymer chain relaxation and drug diffusion from these hydrogels are comparable which also predicts their possible use for site-specific drug delivery.
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Affiliation(s)
- Fahad Naeem
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | - Samiullah Khan
- Faculty of Pharmacy and Alternative Medicine, The Islamia University of Bahawalpur 63100, Punjab, Pakistan
| | - Aamir Jalil
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | | | - Amina Riaz
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | | | - Shoaib Sarwar
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | - Fareha Saher
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | - Samrin Afzal
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
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Clara I, Natchimuthu N. Hydrogels based on starch-g-poly(sodium-2-acrylamido-2-methyl-1-propane sulfonate-co-methacrylic acid) as controlled drug delivery systems. STARCH-STARKE 2016. [DOI: 10.1002/star.201600177] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- I. Clara
- Department of Rubber and Plastics Technology; Madras Institute of Technology Campus; Anna University; Chennai India
| | - N. Natchimuthu
- Department of Rubber and Plastics Technology; Madras Institute of Technology Campus; Anna University; Chennai India
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18
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Zhang YN, Xu SA. Effects of amylose/amylopectin starch on starch-based superabsorbent polymers prepared by γ-radiation. STARCH-STARKE 2016. [DOI: 10.1002/star.201500294] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ya-nan Zhang
- The Chemical Engineering College of Qinghai University; Xining P.R. China
- Shanghai Key Laboratory of Advanced Polymeric Materials; Key Laboratory for Ultrafine Materials of Ministry of Education; School of Materials Science and Engineering; East China University of Science and Technology; Shanghai P.R. China
| | - Shi-ai Xu
- The Chemical Engineering College of Qinghai University; Xining P.R. China
- Shanghai Key Laboratory of Advanced Polymeric Materials; Key Laboratory for Ultrafine Materials of Ministry of Education; School of Materials Science and Engineering; East China University of Science and Technology; Shanghai P.R. China
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Optimized synthesis and swelling properties of a pH-sensitive semi-IPN superabsorbent polymer based on sodium alginate-g-poly(acrylic acid-co-acrylamide) and polyvinylpyrrolidone and obtained via microwave irradiation. JOURNAL OF POLYMER RESEARCH 2015. [DOI: 10.1007/s10965-015-0822-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Akhtar MF, Ranjha NM, Hanif M. Effect of ethylene glycol dimethacrylate on swelling and on metformin hydrochloride release behavior of chemically crosslinked pH-sensitive acrylic acid-polyvinyl alcohol hydrogel. ACTA ACUST UNITED AC 2015; 23:41. [PMID: 26283081 PMCID: PMC4539711 DOI: 10.1186/s40199-015-0123-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 07/27/2015] [Indexed: 11/10/2022]
Abstract
BACKGROUND The present work objective was to prepare and to observe the effect of ethylene glycol dimethacrylate on swelling and on drug release behavior of pH-sensitive acrylic acid-polyvinyl alcohol hydrogel. METHODS In the present work, pH sensitive acrylic acid-polyvinyl alcohol hydrogels have been prepared by free radical polymerization technique in the presence of benzoyl peroxide as an initiator. Different crosslinker contents were used to observe its effect on swelling and on drug release. Dynamic and equilibrium swelling studies of prepared hydrogels were investigated in USP phosphate buffer solutions of pH 1.2, 5.5, 6.5 and 7.5 with constant ionic strengths. Hydrogels were evaluated for polymer volume fraction, solvent interaction parameter, molecular weight between crosslinks, number of links per polymer chain, diffusion coefficient, sol-gel fraction and porosity. To demonstrate the release pattern of the drug, zero-order, first-order, higuchi and korsmeyer-peppas models were applied. Quality and consistency of hydrogels was examined by FTIR and surface morphology of hydrogels was examined by SEM. RESULTS Decrease in swelling and in drug release was seen by increasing content of ethylene glycol dimethacrylate. A remarkable high swelling was observed at high pH indicating the potential of this hydrogel for delivery of drugs to intestine. By increasing the concentration of ethylene glycol dimethacrylate, porosity decreased. Order of release was observed first order in all cases and the mechanism was non-fickian diffusion. FTIR confirmed the formation of network. SEM results showed the incorporation of drug. CONCLUSION The prepared hydrogels can be suitably used for targeted drug delivery to the intestine.
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Affiliation(s)
| | - Nazar Muhammad Ranjha
- Faculty of Pharmacy, Bahauddin Zakariya University, P.O.Box: 60800, Multan, Pakistan
| | - Muhammad Hanif
- Faculty of Pharmacy, Bahauddin Zakariya University, P.O.Box: 60800, Multan, Pakistan
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Synthesis and Characterization of Chemically Cross-Linked Acrylic Acid/Gelatin Hydrogels: Effect of pH and Composition on Swelling and Drug Release. INT J POLYM SCI 2015. [DOI: 10.1155/2015/187961] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This present work was aimed at synthesizing pH-sensitive cross-linked AA/Gelatin hydrogels by free radical polymerization. Ammonium persulfate and ethylene glycol dimethacrylate (EGDMA) were used as initiator and as cross-linking agent, respectively. Different feed ratios of acrylic acid, gelatin, and EGDMA were used to investigate the effect of monomer, polymer, and degree of cross-linking on swelling and release pattern of the model drug. The swelling behavior of the hydrogel samples was studied in 0.05 M USP phosphate buffer solutions of various pH values pH 1.2, pH 5.5, pH 6.5, and pH 7.5. The prepared samples were evaluated for porosity and sol-gel fraction analysis. Pheniramine maleate used for allergy treatment was loaded as model drug in selected samples. The release study of the drug was investigated in 0.05 M USP phosphate buffer of varying pH values (1.2, 5.5, and 7.5) for 12 hrs. The release data was fitted to various kinetic models to study the release mechanism. Hydrogels were characterized by Fourier transformed infrared (FTIR) spectroscopy which confirmed formation of structure. Surface morphology of unloaded and loaded samples was studied by surface electron microscopy (SEM), which confirmed the distribution of model drug in the gel network.
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Saber-Samandari S, Saber-Samandari S, Gazi M. Cellulose-graft-polyacrylamide/hydroxyapatite composite hydrogel with possible application in removal of Cu (II) ions. REACT FUNCT POLYM 2013. [DOI: 10.1016/j.reactfunctpolym.2013.07.007] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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23
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Chemically cross-linked poly(acrylic-co-vinylsulfonic) acid hydrogel for the delivery of isosorbide mononitrate. ScientificWorldJournal 2013; 2013:340737. [PMID: 24250265 PMCID: PMC3821952 DOI: 10.1155/2013/340737] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 09/10/2013] [Indexed: 11/18/2022] Open
Abstract
We report synthesis, characterization, and drug release attributes of a series of novel pH-sensitive poly(acrylic-co-vinylsulfonic) acid hydrogels. These hydrogels were prepared by employing free radical polymerization using ethylene glycol dimethacrylate (EGDMA) and benzyl peroxide (BPO) as cross-linker and initiator, respectively. Effect of acrylic acid (AA), polyvinylsulfonic acid (PVSA), and EGDMA on prepared hydrogels was investigated. All formulations showed higher swelling at high pHs and vice versa. Formulations containing higher content of AA and EGDMA show reduced swelling, but one with higher content of PVSA showed increased swelling. Hydrogel network was characterized by determining structural parameters and loaded with isosorbide mononitrate. FTIR confirmed absence of drug polymer interaction while DSC and TGA demonstrated molecular dispersion of drug in a thermally stable polymeric network. All the hydrogel formulations exhibited a pH dependent release of isosorbide mononitrate which was found to be directly proportional to pH of the medium and PVSA content and inversely proportional to the AA contents. Drug release data were fitted to various kinetics models. Results indicated that release of isosorbide mononitrate from poly(AA-co-VSA) hydrogels was non-Fickian and that the mechanism was diffusion-controlled.
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Controlled release of highly water-soluble antidepressant from hybrid copolymer poly vinyl alcohol hydrogels. Polym Bull (Berl) 2013. [DOI: 10.1007/s00289-013-1043-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Morris G, Kök S, Harding S, Adams G. Polysaccharide drug delivery systems based on pectin and chitosan. Biotechnol Genet Eng Rev 2011; 27:257-84. [PMID: 21415901 DOI: 10.1080/02648725.2010.10648153] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Chitosans and pectins are natural polysaccharides which show great potential in drug delivery systems. Chitosans are a family of strongly polycationic derivatives of poly-N-acetyl-D-glucosamine. This positive charge is very important in chitosan drug delivery systems as it plays a very important role in mucoadhesion (adhesion to the mucosal surface). Other chitosan based drug delivery systems involve complexation with ligands to form chitosan nanoparticles with can be used to encapsulate active compounds. Pectins are made of several structural elements the most important of which are the homogalacturonan (HG) and type I rhamnogalacturonan (RG-I) regions often described in simplified terms as the "smooth" and "hairy" regions respectively. Pectin HG regions consist of poly-glacturonic acid residues which can be partially methyl esterified. Pectins with a degree of methyl esterification (DM) > 50% are known as high methoxyl (HM) pectins and consequently low methoxyl (LM) pectins have a DM less than 50%. Low methoxyl pectins are of particular interest in drug delivery as they can form gels with calcium ion (Ca2+) which has potential applications especially in nasal formulations. In this chapter we will discuss the physicochemical properties of both chitosans and pectins and how these translate to current and potential drug delivery systems.
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Affiliation(s)
- Gordon Morris
- NCMH Laboratory, School of Biosciences, University of Nottingham, Sutton Bonington LE12 5RD, UK
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An JK, Wang WB, Wang AQ. Preparation and swelling properties of a pH-sensitive superabsorbent hydrogel based on psyllium gum. STARCH-STARKE 2010. [DOI: 10.1002/star.200900244] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Jajarmi P, Barzegar S, Pourjavadi A. Modified chitosan as a polymeric nanoreactor for fabrication of pure ZnO nano particles. J Appl Polym Sci 2010. [DOI: 10.1002/app.31730] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Pourjavadi A, Zeidabadi F, Barzegar S. Alginate-based biodegradable superabsorbents as candidates for diclofenac sodium delivery systems. J Appl Polym Sci 2010. [DOI: 10.1002/app.32205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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