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Hidalgo-Alvarez V, Falcon ND, Eldred J, Wormstone M, Saeed A. Stereolithographic Rapid Prototyping of Clear, Foldable, Non-Refractive Intraocular Lens Designs: A Proof-of-Concept Study. Curr Eye Res 2024; 49:843-852. [PMID: 38762982 DOI: 10.1080/02713683.2024.2344164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 04/11/2024] [Indexed: 05/21/2024]
Abstract
PURPOSE A cataract is a cloudy area in the crystalline lens. Cataracts are the leading cause of blindness and the second cause of severe vision impairment worldwide. During cataract surgery, the clouded lens is extracted and replaced with an artificial intraocular lens, which restores the optical power. The fabrication of intraocular lenses using existing molding and lathing techniques is a complex and time-consuming process that limits the development of novel materials and designs. To overcome these limitations, we have developed a stereolithography-based process for producing models of clear lens designs without refractive function, serving as a proof of concept. This process has the potential to contribute toward new lens development, allowing for unlimited design iterations and an expanded range of materials for scientists to explore. METHODS Lens-like 3D objects without refractive function were fabricated by using stereolithography. A photopolymerizable resin containing 2-phenoxyethyl acrylate, poly (ethylene glycol) dimethacrylate, and a suitable photoinitiator was developed for the production of lens-like 3D object prototypes. The morphology of the printed devices was characterized by scanning electron microscopy. The transparency and thermal properties were analyzed using spectrophotometry and differential scanning calorimetry, respectively. The biocompatibility of the devices was investigated in a cultured human lens cell line (FHL-124), using a standard lactate dehydrogenase assay, and the lenses were folded and implanted in the human capsular bag model. RESULTS One-piece lens-like 3D objects without refractive function and with loop-haptic design were successfully fabricated using Stereolithography (SLA) technique. The resulting 3D objects were transparent, as determined by UV spectroscopy. The lactate dehydrogenase test demonstrated the tolerance of lens cells to the prototyping material, and apparent foldability and shape recovery was observed during direct injection into a human capsular bag model in vitro. CONCLUSIONS This proof-of-principle study demonstrated the potential and significance of the rapid prototyping process for research and development of lens-like 3D object prototypes, such as intraocular lenses.
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Affiliation(s)
| | | | - Julie Eldred
- School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Michael Wormstone
- School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Aram Saeed
- School of Pharmacy, University of East Anglia, Norwich, UK
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Shi W, Li H, Chen J, Ching YC, Chuah CH, Xu C, Liu M, Zhang J, Ching KY, Liang Y, Li G, Tang W. Stretchable, Self-Healing, and Bioactive Hydrogel with High-Functionality N,N-bis(acryloyl)cystamine Dynamically Bonded Ag@polydopamine Crosslinkers for Wearable Sensors. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2404451. [PMID: 39031305 DOI: 10.1002/advs.202404451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 06/27/2024] [Indexed: 07/22/2024]
Abstract
Hydrogels present attractive opportunities as flexible sensors due to their soft nature and tunable physicochemical properties. Despite significant advances, practical application of hydrogel-based sensor is limited by the lack of general routes to fabricate materials with combination of mechanical, conductive, and biological properties. Here, a multi-functional hydrogel sensor is reported by in situ polymerizing of acrylamide (AM) with N,N'-bis(acryloyl)cystamine (BA) dynamic crosslinked silver-modified polydopamine (PDA) nanoparticles, namely PAM/BA-Ag@PDA. Compared with traditional polyacrylamide (PAM) hydrogel, the BA-Ag@PDA nanoparticles provide both high-functionality crosslinks and multiple interactions within PAM networks, thereby endowing the optimized PAM/BA-Ag@PDA hydrogel with significantly enhanced tensile/compressive strength (349.80 kPa at 383.57% tensile strain, 263.08 kPa at 90% compressive strain), lower hysteresis (5.2%), improved conductivity (2.51 S m-1) and excellent near-infrared (NIR) light-triggered self-healing ability. As a strain sensor, the PAM/BA-Ag@PDA hydrogel shows a good sensitivity (gauge factor of 1.86), rapid response time (138 ms), and high stability. Owing to abundant reactive groups in PDA, the PAM/BA-Ag@PDA hydrogel exhibits inherent tissue adhesiveness and antioxidant, along with a synergistic antibacterial effect by PDA and Ag. Toward practical applications, the PAM/BA-Ag@PDA hydrogel can conformally adhere to skin and monitor subtle activities and large-scale movements with excellent reliability, demonstrating its promising applications as wearable sensors for healthcare.
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Affiliation(s)
- Wei Shi
- Department of Chemical Engineering, University of Malaya, Lembah Pantai, Kuala Lumpur, 50603, Malaysia
- Key Laboratory of Human-Machine-Intelligence Synergic System, Research Center for Neural Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Hui Li
- College of Big Data and Internet, Shenzhen Technology University, 3002 Lantian Road, Shenzhen, Guangdong, 518118, China
| | - Jing Chen
- Key Laboratory of Human-Machine-Intelligence Synergic System, Research Center for Neural Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Yern Chee Ching
- Department of Chemical Engineering, University of Malaya, Lembah Pantai, Kuala Lumpur, 50603, Malaysia
| | - Cheng Hock Chuah
- Department of Chemistry, University of Malaya, Lembah Pantai, Kuala Lumpur, 50603, Malaysia
| | - Chengsheng Xu
- Key Laboratory of Human-Machine-Intelligence Synergic System, Research Center for Neural Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Moran Liu
- Key Laboratory of Human-Machine-Intelligence Synergic System, Research Center for Neural Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Jinyong Zhang
- College of Big Data and Internet, Shenzhen Technology University, 3002 Lantian Road, Shenzhen, Guangdong, 518118, China
| | - Kuan Yong Ching
- Foundation, Study and Language Institute, University of Reading-Malaysia Campus, Persiaran Graduan, Kota Ilmu EduCity, Iskandar Puteri, Johor, 79200, Malaysia
| | - Yongsheng Liang
- College of Big Data and Internet, Shenzhen Technology University, 3002 Lantian Road, Shenzhen, Guangdong, 518118, China
| | - Guanglin Li
- Key Laboratory of Human-Machine-Intelligence Synergic System, Research Center for Neural Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Wei Tang
- Key Laboratory of Human-Machine-Intelligence Synergic System, Research Center for Neural Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Road, Shenzhen, Guangdong, 518055, China
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Zhang Q, Yan K, Zheng X, Liu Q, Han Y, Liu Z. Research progress of photo-crosslink hydrogels in ophthalmology: A comprehensive review focus on the applications. Mater Today Bio 2024; 26:101082. [PMID: 38774449 PMCID: PMC11107262 DOI: 10.1016/j.mtbio.2024.101082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Revised: 04/19/2024] [Accepted: 05/03/2024] [Indexed: 05/24/2024] Open
Abstract
Hydrogel presents a three-dimensional polymer network with high water content. Over the past decade, hydrogel has developed from static material to intelligent material with controllable response. Various stimuli are involved in the formation of hydrogel network, among which photo-stimulation has attracted wide attention due to the advantages of controllable conditions, which has a good application prospect in the treatment of ophthalmic diseases. This paper reviews the application of photo-crosslink hydrogels in ophthalmology, focusing on the types of photo-crosslink hydrogels and their applications in ophthalmology, including drug delivery, tissue engineering and 3D printing. In addition, the limitations and future prospects of photo-crosslink hydrogels are also provided.
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Affiliation(s)
- Qinghe Zhang
- Department of Ophthalmology, The First Affiliated Hospital of University of South China, Hengyang Medical School, University of South China, Hengyang Hunan 421001, China
| | - Ke Yan
- Department of Ophthalmology, The First Affiliated Hospital of University of South China, Hengyang Medical School, University of South China, Hengyang Hunan 421001, China
| | - Xiaoqin Zheng
- Department of Ophthalmology, The First Affiliated Hospital of University of South China, Hengyang Medical School, University of South China, Hengyang Hunan 421001, China
| | - Qiuping Liu
- Department of Ophthalmology, The First Affiliated Hospital of University of South China, Hengyang Medical School, University of South China, Hengyang Hunan 421001, China
| | - Yi Han
- Department of Ophthalmology, The First Affiliated Hospital of University of South China, Hengyang Medical School, University of South China, Hengyang Hunan 421001, China
| | - Zuguo Liu
- Department of Ophthalmology, The First Affiliated Hospital of University of South China, Hengyang Medical School, University of South China, Hengyang Hunan 421001, China
- Xiamen University Affiliated Xiamen Eye Center, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Fujian Engineering and Research Center of Eye Regenerative Medicine, Eye Institute of Xiamen University, School of Medicine, Xiamen University, Xiamen Fujian 361005, China
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Peng T, Shi Q, Chen M, Yu W, Yang T. Antibacterial-Based Hydrogel Coatings and Their Application in the Biomedical Field-A Review. J Funct Biomater 2023; 14:jfb14050243. [PMID: 37233353 DOI: 10.3390/jfb14050243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/15/2023] [Accepted: 04/21/2023] [Indexed: 05/27/2023] Open
Abstract
Hydrogels exhibit excellent moldability, biodegradability, biocompatibility, and extracellular matrix-like properties, which make them widely used in biomedical fields. Because of their unique three-dimensional crosslinked hydrophilic networks, hydrogels can encapsulate various materials, such as small molecules, polymers, and particles; this has become a hot research topic in the antibacterial field. The surface modification of biomaterials by using antibacterial hydrogels as coatings contributes to the biomaterial activity and offers wide prospects for development. A variety of surface chemical strategies have been developed to bind hydrogels to the substrate surface stably. We first introduce the preparation method for antibacterial coatings in this review, which includes surface-initiated graft crosslinking polymerization, anchoring the hydrogel coating to the substrate surface, and the LbL self-assembly technique to coat crosslinked hydrogels. Then, we summarize the applications of hydrogel coating in the biomedical antibacterial field. Hydrogel itself has certain antibacterial properties, but the antibacterial effect is not sufficient. In recent research, in order to optimize its antibacterial performance, the following three antibacterial strategies are mainly adopted: bacterial repellent and inhibition, contact surface killing of bacteria, and release of antibacterial agents. We systematically introduce the antibacterial mechanism of each strategy. The review aims to provide reference for the further development and application of hydrogel coatings.
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Affiliation(s)
- Tai Peng
- Key Lab of Oral Biomedical Materials and Clinical Application of Heilongjiang Province, Jiamusi University, Jiamusi 154007, China
- School of Materials Science and Engineering, Jiamusi University, Jiamusi 154007, China
| | - Qi Shi
- Key Lab of Oral Biomedical Materials and Clinical Application of Heilongjiang Province, Jiamusi University, Jiamusi 154007, China
- School of Materials Science and Engineering, Jiamusi University, Jiamusi 154007, China
| | - Manlong Chen
- Key Lab of Oral Biomedical Materials and Clinical Application of Heilongjiang Province, Jiamusi University, Jiamusi 154007, China
| | - Wenyi Yu
- Key Lab of Oral Biomedical Materials and Clinical Application of Heilongjiang Province, Jiamusi University, Jiamusi 154007, China
- School of Materials Science and Engineering, Jiamusi University, Jiamusi 154007, China
| | - Tingting Yang
- Key Lab of Oral Biomedical Materials and Clinical Application of Heilongjiang Province, Jiamusi University, Jiamusi 154007, China
- School of Materials Science and Engineering, Jiamusi University, Jiamusi 154007, China
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Larochelle RD, Mann SE, Ifantides C. 3D Printing in Eye Care. Ophthalmol Ther 2021; 10:733-752. [PMID: 34327669 PMCID: PMC8320416 DOI: 10.1007/s40123-021-00379-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 07/19/2021] [Indexed: 12/24/2022] Open
Abstract
Three-dimensional printing enables precise modeling of anatomical structures and has been employed in a broad range of applications across medicine. Its earliest use in eye care included orbital models for training and surgical planning, which have subsequently enabled the design of custom-fit prostheses in oculoplastic surgery. It has evolved to include the production of surgical instruments, diagnostic tools, spectacles, and devices for delivery of drug and radiation therapy. During the COVID-19 pandemic, increased demand for personal protective equipment and supply chain shortages inspired many institutions to 3D-print their own eye protection. Cataract surgery, the most common procedure performed worldwide, may someday make use of custom-printed intraocular lenses. Perhaps its most alluring potential resides in the possibility of printing tissues at a cellular level to address unmet needs in the world of corneal and retinal diseases. Early models toward this end have shown promise for engineering tissues which, while not quite ready for transplantation, can serve as a useful model for in vitro disease and therapeutic research. As more institutions incorporate in-house or outsourced 3D printing for research models and clinical care, ethical and regulatory concerns will become a greater consideration. This report highlights the uses of 3D printing in eye care by subspecialty and clinical modality, with an aim to provide a useful entry point for anyone seeking to engage with the technology in their area of interest.
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Affiliation(s)
- Ryan D Larochelle
- Department of Ophthalmology, University of Colorado, Sue Anschutz-Rodgers Eye Center, 1675 Aurora Court, F731, Aurora, CO, 80045, USA
| | - Scott E Mann
- Department of Otolaryngology, University of Colorado, Aurora, CO, USA
- Department of Surgery, Denver Health Medical Center, Denver, CO, USA
| | - Cristos Ifantides
- Department of Ophthalmology, University of Colorado, Sue Anschutz-Rodgers Eye Center, 1675 Aurora Court, F731, Aurora, CO, 80045, USA.
- Department of Surgery, Denver Health Medical Center, Denver, CO, USA.
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