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Wang F, Xu Y, Zhou Q, Xie L. Biomolecule-based hydrogels as delivery systems for limbal stem cell transplantation: A review. Int J Biol Macromol 2024; 280:135778. [PMID: 39304050 DOI: 10.1016/j.ijbiomac.2024.135778] [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: 03/25/2024] [Revised: 08/25/2024] [Accepted: 09/17/2024] [Indexed: 09/22/2024]
Abstract
Limbal stem cell deficiency (LSCD) is a complex disease of the cornea resulting from dysfunction and/or loss of limbal stem cells (LSCs) and their niche. Most patients with LSCD cannot be treated by conventional corneal transplants because the donor tissue lacks the LSCs necessary for corneal epithelial regeneration. Successful treatment of LSCD depends on effective stem cell transplantation to the ocular surface for replenishment of the LSC reservoir. Thus, stem cell therapies employing carrier substrates for LSCs have been widely explored. Hydrogel biomaterials have many favorable characteristics, including hydrophilicity, flexibility, cytocompatibility, and optical properties suitable for the transplantation of LSCs. Therefore, due to these properties, along with the necessary signals for stem cell proliferation and differentiation, hydrogels are ideal carrier substrates for LSCD treatment. This review summarizes the use of different medical-type hydrogels in LSC transplantation from 2001 to 2024. First, a brief background of LSCD is provided. Then, studies that employed various hydrogel scaffolds as LSC carriers are highlighted to provide a multimodal strategic reference for LSCD treatment. Finally, an analysis of prospective future developments and challenges in the field of hydrogels as LSC carriers for treating LSCD is presented.
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Affiliation(s)
- Fuyan Wang
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao 266071, China
| | - Yuehe Xu
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao 266071, China
| | - Qingjun Zhou
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao 266071, China.
| | - Lixin Xie
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao 266071, China.
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2
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Huang M, Yan X, Gao Y, Song W, Cheng Y, Xie L, Li Y, Zhou X, Yang S. The effect of type 2 diabetes mellitus on lid wiper epitheliopathy and ocular surface parameters. Heliyon 2024; 10:e36912. [PMID: 39281498 PMCID: PMC11402120 DOI: 10.1016/j.heliyon.2024.e36912] [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: 02/16/2024] [Revised: 08/09/2024] [Accepted: 08/23/2024] [Indexed: 09/18/2024] Open
Abstract
Introduction This cross-sectional study was conducted to investigate the impact of type 2 diabetes mellitus(DM) and its duration on indicators such as lid wiper epitheliopathy(LWE), and to assess the significance of LWE for early diagnosis of dry eye disease(DED) in DM patients. Methods A total of 137 subjects with ocular surface disease index(OSDI) score ≥13 were divided into the non-DM group, the short-term DM group (duration <5 years), and the mid-to-long-term DM group(duration ≥5 years). Evaluations were conducted for LWE, OSDI, lipid layer thickness (LLT), partial blinking rate (PBR), fluorescein tear breakup time (FTBUT), corneal fluorescein staining score (CFS), eyelid margin score, and meibomian gland dropout (MGd). Results The upper-LWE score and total LWE score in the mid-to-long-term group were higher than those in the non-DM group (p = 0.008 and p = 0.031, respectively). The lower-LWE scores were more severe than upper-LWE scores in the non-DM and short-term groups (p = 0.001 and p = 0.045, respectively).The confirmed diagnosis rate of DEWSII dry eye with LWE as the primary diagnostic indicator was significantly higher than that which utilize FTBUT<5s as the primary diagnostic indicator(p < 0.05). Compared to the non-DM group, the LLT was thinner and the MGd was more severe in the mid-to long-term group. The upper-LWE score was moderately positively correlated with the MGd, and the lower LWE score was moderately negatively correlated with LLT. Conclusion LWE, LLT, and MGd worsen with the progression of diabetes. Additionally, changes in LWE may precede the FTBUT, indicating that LWE could be considered as an important indicator for early diagnosis of DED in diabetic patients.
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Affiliation(s)
- Meiting Huang
- Peking University First Hospital, Xicheng District, Beijing, China
| | - Xiaoming Yan
- Peking University First Hospital, Xicheng District, Beijing, China
| | - Yuan Gao
- Peking University First Hospital, Xicheng District, Beijing, China
| | - Wenjing Song
- Peking University First Hospital, Xicheng District, Beijing, China
| | - Yu Cheng
- Peking University First Hospital, Xicheng District, Beijing, China
| | - Luoying Xie
- Peking University First Hospital, Xicheng District, Beijing, China
| | - Yingsi Li
- Peking University First Hospital, Xicheng District, Beijing, China
| | - Xuecong Zhou
- Peking University First Hospital, Xicheng District, Beijing, China
| | - Songlin Yang
- Peking University First Hospital, Xicheng District, Beijing, China
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3
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Thomasy SM, Leonard BC, Greiner MA, Skeie JM, Raghunathan VK. Squishy matters - Corneal mechanobiology in health and disease. Prog Retin Eye Res 2024; 99:101234. [PMID: 38176611 PMCID: PMC11193890 DOI: 10.1016/j.preteyeres.2023.101234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/22/2023] [Accepted: 12/27/2023] [Indexed: 01/06/2024]
Abstract
The cornea, as a dynamic and responsive tissue, constantly interacts with mechanical forces in order to maintain its structural integrity, barrier function, transparency and refractive power. Cells within the cornea sense and respond to various mechanical forces that fundamentally regulate their morphology and fate in development, homeostasis and pathophysiology. Corneal cells also dynamically regulate their extracellular matrix (ECM) with ensuing cell-ECM crosstalk as the matrix serves as a dynamic signaling reservoir providing biophysical and biochemical cues to corneal cells. Here we provide an overview of mechanotransduction signaling pathways then delve into the recent advances in corneal mechanobiology, focusing on the interplay between mechanical forces and responses of the corneal epithelial, stromal, and endothelial cells. We also identify species-specific differences in corneal biomechanics and mechanotransduction to facilitate identification of optimal animal models to study corneal wound healing, disease, and novel therapeutic interventions. Finally, we identify key knowledge gaps and therapeutic opportunities in corneal mechanobiology that are pressing for the research community to address especially pertinent within the domains of limbal stem cell deficiency, keratoconus and Fuchs' endothelial corneal dystrophy. By furthering our understanding corneal mechanobiology, we can contextualize discoveries regarding corneal diseases as well as innovative treatments for them.
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Affiliation(s)
- Sara M Thomasy
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California - Davis, Davis, CA, United States; Department of Ophthalmology & Vision Science, School of Medicine, University of California - Davis, Davis, CA, United States; California National Primate Research Center, Davis, CA, United States.
| | - Brian C Leonard
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California - Davis, Davis, CA, United States; Department of Ophthalmology & Vision Science, School of Medicine, University of California - Davis, Davis, CA, United States
| | - Mark A Greiner
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, IA, United States; Iowa Lions Eye Bank, Coralville, IA, United States
| | - Jessica M Skeie
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, IA, United States; Iowa Lions Eye Bank, Coralville, IA, United States
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4
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Costa D, De Matteis V, Treso F, Montani G, Martino M, Rinaldi R, Corrado M, Cascione M. Impact of the physical properties of contact lens materials on the discomfort: role of the coefficient of friction. Colloids Surf B Biointerfaces 2024; 233:113630. [PMID: 37956592 DOI: 10.1016/j.colsurfb.2023.113630] [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: 09/06/2023] [Revised: 10/31/2023] [Accepted: 11/01/2023] [Indexed: 11/15/2023]
Abstract
Contact Lens Discomfort (CLD) is the main cause in contact lens (CLs) discontinuation, referred in literature as drop-out phenomenon. Despite such evidence was reported in several clinical studies, a relationship between physico-chemical properties of CLs and CLD is not still totally understood. In this regard, the friction of CLs surfaces seems to be related to discomfort feeling events, probably due to an alteration of the lubricate function of the tear film after the CL placement inside the ocular environment. In the last years, many studies have been finalized to the friction measurements of CLs surface, finding conflicting data due to a lack in standardized protocol. The aim of this review is primarily to show evident relationships between CLs surface properties (i.e. wettability, tear evaporation, tear film quality, etc.) and the coefficient of friction (CoF), resulting therefore the most relevant physical quantity in the CLs characterization. In addition, we reported the most recent studies in CLs tribology, which highlight that the introduction of a standard protocol in CoF measurements is necessary to obtain reproducible results, considering the aim to evaluate in a more precise way the relationship between this material surface property and comfort in CLs users.
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Affiliation(s)
- D Costa
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Via Arnesano, Lecce 73100, Italy
| | - V De Matteis
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Via Arnesano, Lecce 73100, Italy; Institute for Microelectronics and Microsystems (IMM), CNR, Via Monteroni, Lecce 73100, Italy.
| | - F Treso
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Via Arnesano, Lecce 73100, Italy; Centro di Ricerca in Contattologia Avanzata, Via Arnesano, Lecce 73100, Italy
| | - G Montani
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Via Arnesano, Lecce 73100, Italy; Centro di Ricerca in Contattologia Avanzata, Via Arnesano, Lecce 73100, Italy
| | - M Martino
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Via Arnesano, Lecce 73100, Italy; Centro di Ricerca in Contattologia Avanzata, Via Arnesano, Lecce 73100, Italy
| | - R Rinaldi
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Via Arnesano, Lecce 73100, Italy; Institute for Microelectronics and Microsystems (IMM), CNR, Via Monteroni, Lecce 73100, Italy
| | - M Corrado
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Via Arnesano, Lecce 73100, Italy
| | - M Cascione
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Via Arnesano, Lecce 73100, Italy; Institute for Microelectronics and Microsystems (IMM), CNR, Via Monteroni, Lecce 73100, Italy; Centro di Ricerca in Contattologia Avanzata, Via Arnesano, Lecce 73100, Italy.
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Kato H, Yokoi N, Watanabe A, Komuro A, Sonomura Y, Sotozono C, Kinoshita S. Effect of Punctal Occlusion on Blinks in Eyes with Severe Aqueous Deficient Dry Eye. Diagnostics (Basel) 2023; 14:3. [PMID: 38201312 PMCID: PMC10795606 DOI: 10.3390/diagnostics14010003] [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: 11/15/2023] [Revised: 12/14/2023] [Accepted: 12/17/2023] [Indexed: 01/12/2024] Open
Abstract
Punctal occlusion (PO) is considered to improve both tear-film instability and increased friction during blinking and may consequently affect blinks. The purpose of this study was to investigate the effect of PO on blinks. This study involved 16 eyes of 16 severe aqueous deficient dry eye (ADDE) patients (mean age: 65.7 years). In all eyes, tear meniscus radius (TMR), spread grade (SG) of the tear-film lipid layer (i.e., SG 1-5: 1 being the best), fluorescein break-up time (FBUT), corneal epithelial damage score (CED), conjunctival epithelial damage score, corneal filament (CF) grade, lid-wiper epitheliopathy (LWE) grade, and superior limbic keratoconjunctivitis (SLK) grade were evaluated at before and at more than 1-month after PO. Moreover, using a custom-made high-speed blink analyzer, palpebral aperture height, blink rate, upper-eyelid closing-phase amplitude/duration/maximum velocity, and upper-eyelid opening-phase amplitude/duration/maximum velocity were measured at the same time point. After PO, TMR, SG, FBUT, CED, and the CF, LWE, and SLK grades were significantly improved, and upper-eyelid opening/closing-phase amplitude and maximum velocity significantly increased (all p < 0.04). The findings of this study suggest that PO improves ocular surface lubrication and that blink-related parameters can reflect the friction that occurs during blinking in eyes with severe ADDE.
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Affiliation(s)
- Hiroaki Kato
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan; (H.K.)
| | - Norihiko Yokoi
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan; (H.K.)
| | - Akihide Watanabe
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan; (H.K.)
| | - Aoi Komuro
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan; (H.K.)
| | - Yukiko Sonomura
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan; (H.K.)
| | - Chie Sotozono
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan; (H.K.)
| | - Shigeru Kinoshita
- Department of Frontier Medical Science and Technology for Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan
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Ishihara K, Shi X, Fukazawa K, Yamaoka T, Yao G, Wu JY. Biomimetic-Engineered Silicone Hydrogel Contact Lens Materials. ACS APPLIED BIO MATERIALS 2023; 6:3600-3616. [PMID: 37616500 PMCID: PMC10521029 DOI: 10.1021/acsabm.3c00296] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 08/16/2023] [Indexed: 08/26/2023]
Abstract
Contact lenses are one of the most successful applications of biomaterials. The chemical structure of the polymers used in contact lenses plays an important role in determining the function of contact lenses. Different types of contact lenses have been developed based on the chemical structure of polymers. When designing contact lenses, materials scientists consider factors such as mechanical properties, processing properties, optical properties, histocompatibility, and antifouling properties, to ensure long-term wear with minimal discomfort. Advances in contact lens materials have addressed traditional issues such as oxygen permeability and biocompatibility, improving overall comfort, and duration of use. For example, silicone hydrogel contact lenses with high oxygen permeability were developed to extend the duration of use. In addition, controlling the surface properties of contact lenses in direct contact with the cornea tissue through surface polymer modification mimics the surface morphology of corneal tissue while maintaining the essential properties of the contact lens, a significant improvement for long-term use and reuse of contact lenses. This review presents the material science elements required for advanced contact lenses of the future and summarizes the chemical methods for achieving these goals.
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Affiliation(s)
- Kazuhiko Ishihara
- Division
of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Xinfeng Shi
- Alcon
Research, LLC, Fort Worth, Texas 76134, United States
| | - Kyoko Fukazawa
- National
Cerebral and Cardiovascular Center Research Institute, Suita, Osaka 564-8565, Japan
| | - Tetsuji Yamaoka
- National
Cerebral and Cardiovascular Center Research Institute, Suita, Osaka 564-8565, Japan
| | - George Yao
- Alcon
Research, LLC, Duluth, Georgia 30097, United States
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7
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Yao G, Mo X, Liu S, Wang Q, Xie M, Lou W, Chen S, Pan T, Chen K, Yao D, Lin Y. Snowflake-inspired and blink-driven flexible piezoelectric contact lenses for effective corneal injury repair. Nat Commun 2023; 14:3604. [PMID: 37330515 PMCID: PMC10276863 DOI: 10.1038/s41467-023-39315-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 06/06/2023] [Indexed: 06/19/2023] Open
Abstract
The cornea is a tissue susceptible to various injuries and traumas with a complicated cascade repair process, in which conserving its integrity and clarity is critical to restoring visual function. Enhancing the endogenous electric field is recognized as an effective method of accelerating corneal injury repair. However, current equipment limitations and implementation complexities hinder its widespread adoption. Here, we propose a snowflake-inspired, blink-driven flexible piezoelectric contact lens that can convert mechanical blink motions into a unidirectional pulsed electric field for direct application to moderate corneal injury repair. The device is validated on mouse and rabbit models with different relative corneal alkali burn ratios to modulate the microenvironment, alleviate stromal fibrosis, promote orderly epithelial arrangement and differentiation, and restore corneal clarity. Within an 8-day intervention, the corneal clarity of mice and rabbits improves by more than 50%, and the repair rate of mouse and rabbit corneas increases by over 52%. Mechanistically, the device intervention is advantageous in blocking growth factors' signaling pathways specifically involved in stromal fibrosis whilst preserving and harnessing the signaling pathways required for indispensable epithelial metabolism. This work put forward an efficient and orderly corneal therapeutic technology utilizing artificial endogenous-strengthened signals generated by spontaneous body activities.
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Affiliation(s)
- Guang Yao
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China.
- State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China.
- Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, 518110, China.
| | - Xiaoyi Mo
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China
| | - Shanshan Liu
- MOE Key Laboratory for Neuroinformation, The Clinical Hospital of Chengdu Brain Sciences Institute, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China
| | - Qian Wang
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China
| | - Maowen Xie
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China
| | - Wenhao Lou
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China
| | - Shiyan Chen
- Department of Ophthalmology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Medical School, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China
| | - Taisong Pan
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China
| | - Ke Chen
- MOE Key Laboratory for Neuroinformation, The Clinical Hospital of Chengdu Brain Sciences Institute, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China.
- Department of Ophthalmology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Medical School, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China.
| | - Dezhong Yao
- MOE Key Laboratory for Neuroinformation, The Clinical Hospital of Chengdu Brain Sciences Institute, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China
| | - Yuan Lin
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China.
- State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China.
- Medico-Engineering Cooperation on Applied Medicine Research Center, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China.
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