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Wu KY, Khan S, Liao Z, Marchand M, Tran SD. Biopolymeric Innovations in Ophthalmic Surgery: Enhancing Devices and Drug Delivery Systems. Polymers (Basel) 2024; 16:1717. [PMID: 38932068 PMCID: PMC11207407 DOI: 10.3390/polym16121717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 05/30/2024] [Accepted: 06/13/2024] [Indexed: 06/28/2024] Open
Abstract
The interface between material science and ophthalmic medicine is witnessing significant advances with the introduction of biopolymers in medical device fabrication. This review discusses the impact of biopolymers on the development of ophthalmic devices, such as intraocular lenses, stents, and various prosthetics. Biopolymers are emerging as superior alternatives due to their biocompatibility, mechanical robustness, and biodegradability, presenting an advance over traditional materials with respect to patient comfort and environmental considerations. We explore the spectrum of biopolymers used in ophthalmic devices and evaluate their physical properties, compatibility with biological tissues, and clinical performances. Specific applications in oculoplastic and orbital surgeries, hydrogel applications in ocular therapeutics, and polymeric drug delivery systems for a range of ophthalmic conditions were reviewed. We also anticipate future directions and identify challenges in the field, advocating for a collaborative approach between material science and ophthalmic practice to foster innovative, patient-focused treatments. This synthesis aims to reinforce the potential of biopolymers to improve ophthalmic device technology and enhance clinical outcomes.
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Affiliation(s)
- Kevin Y. Wu
- Department of Surgery, Division of Ophthalmology, University of Sherbrooke, Sherbrook, QC J1G 2E8, Canada; (K.Y.W.); (M.M.)
| | - Sameer Khan
- Department of Biology, Carleton University, Ottawa, ON K1S 5B6, Canada
| | - Zhuoying Liao
- Department of Biology, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Michael Marchand
- Department of Surgery, Division of Ophthalmology, University of Sherbrooke, Sherbrook, QC J1G 2E8, Canada; (K.Y.W.); (M.M.)
| | - Simon D. Tran
- Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, QC H3A 1G1, Canada
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Panda G, Barik D, Dash M. Understanding Matrix Stiffness in Vinyl Polymer Hydrogels: Implications in Bone Tissue Engineering. ACS OMEGA 2024; 9:17891-17902. [PMID: 38680357 PMCID: PMC11044159 DOI: 10.1021/acsomega.3c08877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 02/23/2024] [Accepted: 02/28/2024] [Indexed: 05/01/2024]
Abstract
Matrix elasticity helps to direct bone cell differentiation, impact healing processes, and modify extracellular matrix deposition, all of which are required for tissue growth and maintenance. In this work, we evaluated the role of inorganic nanocrystals or mineral inducers such as nanohydroxyapatite, alkaline phosphatase, and nanoclay also known as montmorillonite deposited on vinyl-based hydrogels in generating matrices with different stiffness and their role in cell differentiation. Poly-2-(dimethylamino)ethyl methacrylate (PD) and poly-2-hydroxypropylmethacrylamide (PH) are the two types of vinyl polymers chosen for preparing hydrogels via thermal cross-linking. The hydrogels exhibited porosity, which decreased with an increase in stiffness. Each of the compositions is non-cytotoxic and maintains the viability of pre-osteoblasts (MC3T3-E1) and human bone marrow mesenchymal stem cells (hBMSCs). The PD hydrogels in the presence of ALP showed the highest mineralization ability confirmed through the alizarin assay and a better structural environment for their use as scaffolds for tissue engineering. The study reveals that understanding such interactions can generate hydrogels that can serve as efficient 3D models to study biomineralization.
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Affiliation(s)
| | - Debyashreeta Barik
- Institute
of Life Sciences, Nalco
Square, Bhubaneswar, Odisha 751023, India
- School
of Biotechnology, Kalinga Institute of Industrial
Technology (KIIT) University, Bhubaneswar, Odisha 751024, India
| | - Mamoni Dash
- Institute
of Life Sciences, Nalco
Square, Bhubaneswar, Odisha 751023, India
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Ke Y, Wu J, Ye Y, Zhang X, Gu T, Wang Y, Jiang F, Yu J. Feather keratin-montmorillonite nanocomposite hydrogel promotes bone regeneration by stimulating the osteogenic differentiation of endogenous stem cells. Int J Biol Macromol 2023:125330. [PMID: 37307978 DOI: 10.1016/j.ijbiomac.2023.125330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/06/2023] [Accepted: 06/08/2023] [Indexed: 06/14/2023]
Abstract
Bone defects caused by bone trauma, infection, surgery, or other systemic diseases remain a severe challenge for the medical field. To address this clinical problem, different hydrogels were exploited to promote bone tissue regrowth and regeneration. Keratins are natural fibrous proteins found in wool, hair, horns, nails, and feather. Due to their unique characteristics of outstanding biocompatibility, great biodegradability, and hydrophilic, keratins have been widely applicated in different fields. In our study, the feather keratin-montmorillonite nanocomposite hydrogels that consist of keratin hydrogels serving as the scaffold support to accommodate endogenous stem cells and montmorillonite is synthesized. The introduction of montmorillonite greatly improves the osteogenic effect of the keratin hydrogels via bone morphogenetic protein 2 (BMP-2)/phosphorylated small mothers against decapentaplegic homolog 1/5/8 (p-SMAD 1/5/8)/runt-related transcription factor 2 (RUNX2) expression. Moreover, the incorporation of montmorillonite into hydrogels can improve the mechanical properties and bioactivity of the hydrogels. The morphology of feather keratin-montmorillonite nanocomposite hydrogels was shown by scanning electron microscopy (SEM) to have an interconnected porous structure. The incorporation of montmorillonite into the keratin hydrogels was confirmed by the energy dispersive spectrum (EDS). We prove that the feather keratin-montmorillonite nanocomposite hydrogels enhance the osteogenic differentiation of BMSCs. Furthermore, micro-CT and histological analysis of rat cranial bone defect demonstrated that feather keratin-montmorillonite nanocomposite hydrogels dramatically stimulated bone regeneration in vivo. Collectively, feather keratin-montmorillonite nanocomposite hydrogels can regulate BMP/SMAD signaling pathway to stimulate osteogenic differentiation of endogenous stem cells and promote bone defect healing, indicating their promising candidate in bone tissue engineering.
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Affiliation(s)
- Yue Ke
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China; Department of Stomatology, East Hospital Affiliated to Tongji University, Shanghai 200120, China; Department of Endodontic, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Jintao Wu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China; Institute of Stomatology, Nanjing Medical University, Nanjing, China; Department of Endodontic, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Yu Ye
- Institute of Periodontology, Nanjing Medical University, Nanjing, China; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Xiaolan Zhang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China; Institute of Stomatology, Nanjing Medical University, Nanjing, China; Department of Endodontic, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Tingjie Gu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China; Institute of Stomatology, Nanjing Medical University, Nanjing, China; Department of Endodontic, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Yanqiu Wang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China; Institute of Stomatology, Nanjing Medical University, Nanjing, China; Department of Endodontic, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Fei Jiang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China; Department of General Dentistry, Nanjing Medical University, Nanjing, China; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China; Department of Endodontic, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China.
| | - Jinhua Yu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China; Institute of Stomatology, Nanjing Medical University, Nanjing, China; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China; Department of Endodontic, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China.
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Recent Advances of Chitosan Formulations in Biomedical Applications. Int J Mol Sci 2022; 23:ijms231810975. [PMID: 36142887 PMCID: PMC9504745 DOI: 10.3390/ijms231810975] [Citation(s) in RCA: 57] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/12/2022] [Accepted: 09/13/2022] [Indexed: 02/07/2023] Open
Abstract
Chitosan, a naturally abundant cationic polymer, is chemically composed of cellulose-based biopolymers derived by deacetylating chitin. It offers several attractive characteristics such as renewability, hydrophilicity, biodegradability, biocompatibility, non-toxicity, and a broad spectrum of antimicrobial activity towards gram-positive and gram-negative bacteria as well as fungi, etc., because of which it is receiving immense attention as a biopolymer for a plethora of applications including drug delivery, protective coating materials, food packaging films, wastewater treatment, and so on. Additionally, its structure carries reactive functional groups that enable several reactions and electrochemical interactions at the biomolecular level and improves the chitosan’s physicochemical properties and functionality. This review article highlights the extensive research about the properties, extraction techniques, and recent developments of chitosan-based composites for drug, gene, protein, and vaccine delivery applications. Its versatile applications in tissue engineering and wound healing are also discussed. Finally, the challenges and future perspectives for chitosan in biomedical applications are elucidated.
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