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Peng W, Lu X, Wu J, Wang Y, Zhu X, Ouyang H, Li L, Wu J, Liu Y, Bao J. Autoclaving pHEMA-Based Hydrogels Immersed in Deionized Water has No Effect on Physicochemical Properties and Cell Behaviors. ACS OMEGA 2022; 7:32038-32045. [PMID: 36120001 PMCID: PMC9475621 DOI: 10.1021/acsomega.2c03096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 07/21/2022] [Indexed: 05/16/2023]
Abstract
Hydrogels based on poly-(2-hydroxyethyl methacrylate) (pHEMA) have been widely used as biomaterials in tissue engineering due to their biocompatibility, hydrophilicity, and low friction coefficient. The terminal sterilization of hydrogels is a critical step in clinical applications. However, regulations and standardization for the sterilization of hydrogels based on pHEMA are still lacking. In this study, we explored six sterilization methods on pHEMA-based materials (A1: pHEMA, A2: pHEMA copolymerizes with acrylic acid, and A3: pHEMA copolymerizes with acrylic acid and further coordinated with iron ions), such as gamma irradiation, 75% ethanol, ultraviolet (UV), ethylene oxide (EtO), and autoclaving with or without deionized water (autoclaving-H2O or autoclaving-dry). Combining results from the multifaceted approaches with assessment, pHEMA-based hydrogels can be completely sterilized via the autoclaving-H2O method analyzed by sterilized testing. The physicochemical properties and cell behavior of sterilized hydrogels were not influenced by this sterilization approach, validated by Fourier transform infrared (FT-IR) spectroscopy and tensile tests. The pHEMA-based hydrogel sterilized by the autoclaving-H2O method also had no effect on the cell behavior evaluated by in vitro cytotoxicity experiments and caused no evident inflammatory reaction in tissue in vivo implantation experiments. However, it was also found that there were still some defects in the A2 and A3 groups as biomaterials possibly because of an inappropriate proportion of formulations or raw material used in exploring sterilization methods. These findings have implications for the improvement and clinical application of pHEMA-based hydrogels.
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Affiliation(s)
- Wanliu Peng
- Institute
of Clinical Pathology, Key Laboratory of Transplant Engineering and
Immunology, NHC, West China Hospital, Sichuan
University, Chengdu 610041, Sichuan Province, China
| | - Xingbing Lu
- Department
of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Junliang Wu
- Department
of Plastic and Burn Surgery, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Yi Wang
- College
of Chemistry and Materials Science, Sichuan
Normal University, Chengdu 610068, Sichuan Province, China
| | - Xinglong Zhu
- Institute
of Clinical Pathology, Key Laboratory of Transplant Engineering and
Immunology, NHC, West China Hospital, Sichuan
University, Chengdu 610041, Sichuan Province, China
| | - Hongyan Ouyang
- College
of Chemistry and Materials Science, Sichuan
Normal University, Chengdu 610068, Sichuan Province, China
| | - Li Li
- Institute
of Clinical Pathology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Jinrong Wu
- College of
Polymer Science & Materials, State Key Laboratory of Polymer Materials
Engineering, Sichuan University, Chengdu 610065, Sichuan Province, China
| | - Yong Liu
- Department
of Plastic and Burn Surgery, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Ji Bao
- Institute
of Clinical Pathology, Key Laboratory of Transplant Engineering and
Immunology, NHC, West China Hospital, Sichuan
University, Chengdu 610041, Sichuan Province, China
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Exploring RSM-CCD-optimized chitosan-/gelatin-based hybrid polymer network containing CPM–β-CD inclusion complexes as controlled drug delivery systems. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2555-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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3
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A review on pH and temperature responsive gels and other less explored drug delivery systems. J Drug Deliv Sci Technol 2018. [DOI: 10.1016/j.jddst.2018.05.037] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Hydrogels for Atopic Dermatitis and Wound Management: A Superior Drug Delivery Vehicle. Pharmaceutics 2018; 10:pharmaceutics10020071. [PMID: 29899219 PMCID: PMC6027388 DOI: 10.3390/pharmaceutics10020071] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 06/06/2018] [Accepted: 06/13/2018] [Indexed: 02/08/2023] Open
Abstract
Wound management, in addition to presenting a significant burden to patients and their families, also contributes significantly to a country’s healthcare costs. Treatment strategies are numerous, but in most cases not ideal. Hydrogels, three-dimensional polymeric materials that can withstand a great degree of swelling without losing structural integrity, are drawing great attention for their use as topical wound management solutions in the form of films and as vehicles for drug delivery, due to their unique properties of high water content, biocompatibility, and flexibility. Hydrogels, both naturally and synthetically derived, can be tuned to respond to specific stimuli such as pH, temperature and light and they are ideally suited as drug delivery vehicles. Here we provide a brief overview of the history and characteristics of hydrogels, assess their uses in wound management and drug delivery, and compare them with other types of common drug delivery vehicle.
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Pinto MN, Chakraborty I, Sandoval C, Mascharak PK. Eradication of HT-29 colorectal adenocarcinoma cells by controlled photorelease of CO from a CO-releasing polymer (photoCORP-1) triggered by visible light through an optical fiber-based device. J Control Release 2017; 264:192-202. [PMID: 28866022 DOI: 10.1016/j.jconrel.2017.08.039] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 08/06/2017] [Accepted: 08/29/2017] [Indexed: 10/18/2022]
Abstract
The gaseous signaling molecule carbon monoxide (CO) has recently been recognized for its wide range of physiological activity as well as its antineoplastic properties. However, site-specific delivery of this noxious gas presents a major challenge in hospital settings. In this work, a visible light-sensitive CO-releasing molecule (photoCORM) derived from manganese(I) and 2-(quinolyl)benzothiazole (qbt) namely, [Mn(CO)3(qbt)(4-vpy)](CF3SO3) (1), has been co-polymerized within a gas-permeable HEMA/EGDMA hydrogel. The resulting photoactive CO-releasing polymer (photoCORP-1) incorporates 1 such that neither the carbonyl complex nor its photoproduct(s) exits the polymer at any time. The material can be triggered to photorelease CO remotely by low-power broadband visible light (<1mWcm-2) with the aid of fiber optics technology. The CO photorelease rates of photoCORP-1 (determined by spectrophotometry) can be modulated by both the concentration of 1 in the hydrogel and the intensity of the light. A CO-delivery device has been assembled to deliver CO to a suspension of human colorectal adenocarcinoma cells (HT-29) under the control of visible light and the extent of CO-induced apoptotic death of the cancer cells has been determined via Annexin V/Propidium iodide stain and flow cytometry. This photoactive CO-releasing polymer could find use in delivering controlled doses of CO to cellular targets such as malignant tissues in remote parts of the body.
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Affiliation(s)
- Miguel N Pinto
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, USA
| | - Indranil Chakraborty
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, USA
| | - Cosme Sandoval
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, USA
| | - Pradip K Mascharak
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, USA.
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6
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A carboxy methyl tamarind polysaccharide matrix for adhesion and growth of osteoclast-precursor cells. Carbohydr Polym 2014; 101:1033-42. [DOI: 10.1016/j.carbpol.2013.10.047] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Revised: 10/08/2013] [Accepted: 10/11/2013] [Indexed: 11/23/2022]
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7
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Fares MM, Assaf SM, Jaber AA. Biodegradable amphiphiles of grafted poly(lactide) onto 2-hydroxyethyl methacrylate-co-N-vinylpyrrolidone copolymers as drug carriers. J Appl Polym Sci 2011. [DOI: 10.1002/app.34054] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Halpenny GM, Steinhardt RC, Okialda KA, Mascharak PK. Characterization of pHEMA-based hydrogels that exhibit light-induced bactericidal effect via release of NO. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20:2353-60. [PMID: 19554428 PMCID: PMC2778696 DOI: 10.1007/s10856-009-3795-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2009] [Accepted: 06/01/2009] [Indexed: 05/17/2023]
Abstract
A light-activated NO donor, [Mn(PaPy(3))(NO)]ClO(4) (1a), has been incorporated into HEMA-based polymer hydrogel and the nitrosyl-polymer conjugate materials 1a(x) · HG and 1a(x) · HG(MB) have been characterized. The NO releasing properties and antibacterial capabilities of these materials in conjunction with growth attenuators such as hydrogen peroxide and methylene blue (MB) are reported. Since the nitrosyl releases NO only upon exposure to light, materials like 1a(x) · HG(MB) could be used as wound dressings that deliver NO under controlled conditions.
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Affiliation(s)
- Genevieve M. Halpenny
- Department of Chemistry and Biochemistry, University of California at Santa Cruz, 1156 High Street, Santa Cruz, CA 95064 USA
| | - Rachel C. Steinhardt
- Department of Chemistry and Biochemistry, University of California at Santa Cruz, 1156 High Street, Santa Cruz, CA 95064 USA
| | - Krystle A. Okialda
- Department of Chemistry and Biochemistry, University of California at Santa Cruz, 1156 High Street, Santa Cruz, CA 95064 USA
| | - Pradip K. Mascharak
- Department of Chemistry and Biochemistry, University of California at Santa Cruz, 1156 High Street, Santa Cruz, CA 95064 USA
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Pfluger CA, Carrier RL, Sun B, Ziemer KS, Burkey DD. Cross-Linking and Degradation Properties of Plasma Enhanced Chemical Vapor Deposited Poly(2-hydroxyethyl methacrylate). Macromol Rapid Commun 2008; 30:126-32. [PMID: 21706587 DOI: 10.1002/marc.200800647] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2008] [Accepted: 10/23/2008] [Indexed: 11/09/2022]
Abstract
Plasma Enhanced Chemical Vapor Deposition (PECVD) of poly-2-hydroxyethyl methacrylate (pHEMA) biocompatible, biodegradable polymer films were produced alone and cross-linked with ethylene glycol diacrylate (EGDA). Degree of cross-linking was controlled via manipulation of the EGDA flow rate, which influenced the amount of swelling and the extent of degradation of the films in an aqueous solution over time. Noncross-linked pHEMA films swelled 10% more than cross-linked films after 24 h of incubation in an aqueous environment. Increasing degree of film cross-linking decreased degradation over time. Thus, PECVD pHEMA films with variable cross-linking properties enable tuning of gel formation and degradation properties, making these films useful in a variety of biologically significant applications.
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Affiliation(s)
- Courtney A Pfluger
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, USA.
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Smolensky MH, Peppas NA. Chronobiology, drug delivery, and chronotherapeutics. Adv Drug Deliv Rev 2007; 59:828-51. [PMID: 17884237 DOI: 10.1016/j.addr.2007.07.001] [Citation(s) in RCA: 161] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/25/2007] [Indexed: 11/26/2022]
Abstract
Biological processes and functions are organized in space, as a physical anatomy, and time, as a biological time structure. The latter is expressed by short-, intermediate-, and long-period oscillations, i.e., biological rhythms. The circadian (24-h) time structure has been most studied and shows great importance to the practice of medicine and pharmacotherapy of patients. The phase and amplitude of key physiological and biochemical circadian rhythms contribute to the known predictable-in-time patterns in the occurrence of serious and life-threatening medical events, like myocardial infraction and stroke, and the manifestation and severity of symptoms of chronic diseases, like allergic rhinitis, asthma, and arthritis. Moreover, body rhythms can significantly affect responses of patients to diagnostic tests and, most important to the theme of this special issue, medications. Rhythmicity in the pathophysiology of disease is one basis for chronotherapeutics--purposeful variation in time of the concentration of medicines in synchrony with biological rhythm determinants of disease activity--to optimize treatment outcomes. A second basis is the control of undesired effects of medications, especially when the therapeutic range is narrow and the potential for adverse effects high, which is the case for cancer drugs. A third basis is to meet the biological requirements for frequency-modulated drug delivery, which is the case for certain neuroendocrine peptide analogues. Great progress has been realized with hydrogels, and they offer many advantages and opportunities in the design of chronotherapeutic systems for drug delivery via the oral, buccal, nasal, subcutaneous, transdermal, rectal, and vaginal routes. Nonetheless, innovative delivery systems will be necessary to ensure optimal application of chronotherapeutic interventions. Next generation drug-delivery systems must be configurable so they (i) require minimal volitional adherence, (ii) respond to sensitive biomarkers of disease activity that often vary in time as periodic (circadian rhythmic) and non-periodic (random) patterns to release medication to targeted tissue(s) on a real time as needed basis, and (iii) are cost-effective.
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Affiliation(s)
- Michael H Smolensky
- School of Public Health, RAS, W606, Division of Environmental and Occupational Health Sciences, The University of Texas Health Science Center at Houston, 1200 Herman Pressler, Houston, Texas 77030, USA.
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Cronin MT, Dearden JC, Gupta R, Moss GP. An investigation of the mechanism of flux across polydimethylsiloxane membranes by use of quantitative structure-permeability relationships. J Pharm Pharmacol 1998; 50:143-52. [PMID: 9530981 DOI: 10.1111/j.2042-7158.1998.tb06169.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Quantitative structure-permeability relationships (QSPRs) based on readily calculated parameters have been developed to study penetration across a polydimethylsiloxane membrane. Maximum steady-state flux values for 256 compounds through a polydimethylsiloxane membrane were taken from previous studies. Forty-three physicochemical parameters were calculated for each compound and their significance to flux determined. Removal of fourteen outliers enabled derivation of a significant three-parameter QSPR based on the number of hydrogen-bond acceptor and donor groups and sixth-order path molecular connectivity. Models based on parameters important for penetration across human skin (log P and molecular weight) were comparatively poor. This model suggests that the mechanism of flux across a polydimethylsiloxane membrane is based mainly on hydrogen-bonding effects; as such it occurs via a mechanism of action different from that of penetration of the skin in man.
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Affiliation(s)
- M T Cronin
- School of Pharmacy and Chemistry, Liverpool John Moores University, UK
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