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Liao L, Zhu W, Liu H, Wu P, Zhang X, Zhou X, Xu J, Zhao Y, Duan X. Photocrosslinkable Sericin Hydrogel Injected into the Anterior Chamber of Mice with Chronic Ocular Hypertension Efficacy, Medication Sensitivity, and Material Safety. Bioengineering (Basel) 2024; 11:607. [PMID: 38927843 PMCID: PMC11200424 DOI: 10.3390/bioengineering11060607] [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: 04/11/2024] [Revised: 05/30/2024] [Accepted: 06/05/2024] [Indexed: 06/28/2024] Open
Abstract
(1) Background: A rise in intraocular pressure (IOP) and decreased retinal ganglion cells are frequent indicators of effective modeling of chronic ocular hypertension in mice. In this study, the sensitivity of the mouse model to pharmaceutical therapy to reduce intraocular tension was assessed, the model's safety was confirmed using a cytotoxicity test, and the success rate of the mouse model of ocular hypertension was assessed by assessing alterations in IOP and neurons in the ganglion cell layer. (2) Methods: A mouse model of chronic ocular hypertension was produced in this study by employing photocrosslinkable sericin hydrogel injection and LED lamp irradiation. The eyes of 25 C57BL/6 male mice were subjected to 405 nm UV light from the front for 2 min after being injected with 5 μL of sericin hydrogel in the anterior chamber of the left eye. IOP in the mice was measured daily, and IOP rises greater than 5 mmHg were considered intraocular hypertension. When the IOP was lowered, the intervention was repeated once, but the interval between treatments was at least 2 weeks. The right eyes were not treated with anything as a normal control group. Mice eyeballs were stained with HE, Ni-type, and immunofluorescence to assess the model's efficacy. Two common drugs (tafluprost eye drops and timolol eye drops) were provided for one week after four weeks of stable IOP, and IOP changes were assessed to determine the drug sensitivity of the mouse model of chronic ocular hypertension. Furthermore, CellTiter 96® AQueous One Solution Cell Proliferation Assay (MTS) was utilized to investigate the safety of the ocular hypertension model by evaluating the deleterious effects of photocrosslinkable sericin hydrogel on cells. (3) Results: Before injection, the basal IOP was (9.42 ± 1.28) mmHg (1 kPa = 7.5 mmHg) in the experimental group and (9.08 ± 1.21) in the control group. After injection, cataract occurred in one eye, corneal edema in one eye, endophthalmitis in one eye, iris incarceration in one eye, and eyeball atrophy in one eye. Five mice with complications were excluded from the experiment, and twenty mice were left. Four weeks after injection, the IOP of the experimental group was maintained at (19.7 ± 4.52) mmHg, and that of the control group was maintained at (9.92 ± 1.55) mmHg, and the difference between the two groups was statistically significant (p < 0.05). Before the intervention, the IOP in the experimental group was (21.7 ± 3.31) mmHg in the high IOP control group, (20.33 ± 2.00) mmHg in the tafluprost eye drops group, and (20.67 ± 3.12) mmHg in the timolol maleate eye drops group. The IOP after the intervention was (23.2 ± 1.03) mmHg, (12.7 ± 2.11) mmHg, and (10.4 ± 1.43) mmHg, respectively. Before and after the intervention, there were no significant differences in the high-IOP control group (p > 0.05), there were statistically significant differences in the timolol eye drops group (p < 0.05), and there were statistically significant differences in the tafluprost eye drops group (p < 0.05). One week after drug withdrawal, there was no significant difference in IOP among the three groups (p > 0.05). In the high-IOP group, the protein (sericin hydrogel) showed a short strips or fragmented structure in the anterior chamber, accompanied by a large number of macrophages and a small number of plasma cells. The shape of the chamber angle was normal in the blank control group. The number of retinal ganglion cells decreased significantly 8 weeks after injection of sericin hydrogel into the anterior chamber, and the difference was statistically significant compared with the blank control group (p < 0.05). After the cells were treated with photocrosslinkable sericin hydrogel, there was no significant difference in the data of the CellTiter 96® assay kit of MTS compared with the blank control group (p > 0.05). (4) Conclusions: A mouse model of chronic intraocular hypertension can be established successfully by injecting sericin in the anterior chamber and irradiating with ultraviolet light. The model can simulate the structural and functional changes of glaucoma and can effectively reduce IOP after the action of most antihypertensive drugs, and it is highly sensitive to drugs. Sericin has no obvious toxic effect on cells and has high safety.
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Affiliation(s)
- Li Liao
- Aier Academy of Ophthalmology, Central South University, Changsha 410015, China; (L.L.); (P.W.)
- Aier Glaucoma Institute, Changsha Aier Eye Hospital, Changsha 410015, China; (X.Z.); (X.Z.); (J.X.)
| | - Wenxiang Zhu
- College of Materials Science and Engineering, Hunan University, Changsha 410082, China; (W.Z.); (H.L.)
| | - Hairong Liu
- College of Materials Science and Engineering, Hunan University, Changsha 410082, China; (W.Z.); (H.L.)
| | - Ping Wu
- Aier Academy of Ophthalmology, Central South University, Changsha 410015, China; (L.L.); (P.W.)
- Aier Glaucoma Institute, Changsha Aier Eye Hospital, Changsha 410015, China; (X.Z.); (X.Z.); (J.X.)
| | - Xinyue Zhang
- Aier Glaucoma Institute, Changsha Aier Eye Hospital, Changsha 410015, China; (X.Z.); (X.Z.); (J.X.)
| | - Xiaoyu Zhou
- Aier Glaucoma Institute, Changsha Aier Eye Hospital, Changsha 410015, China; (X.Z.); (X.Z.); (J.X.)
| | - Jiahao Xu
- Aier Glaucoma Institute, Changsha Aier Eye Hospital, Changsha 410015, China; (X.Z.); (X.Z.); (J.X.)
| | - Yang Zhao
- Aier Glaucoma Institute, Changsha Aier Eye Hospital, Changsha 410015, China; (X.Z.); (X.Z.); (J.X.)
| | - Xuanchu Duan
- Aier Academy of Ophthalmology, Central South University, Changsha 410015, China; (L.L.); (P.W.)
- Aier Glaucoma Institute, Changsha Aier Eye Hospital, Changsha 410015, China; (X.Z.); (X.Z.); (J.X.)
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Tumbocon JA, Wong TT, Sangapillai T, Yen YC, Park SW, Lim HH, Ruangvaravate N. A Pooled Assessment of Ocular Surface Disease After Switching from Preserved Prostaglandins to Tafluprost Across Six Countries in Asia. Clin Ophthalmol 2022; 16:2669-2676. [PMID: 35999967 PMCID: PMC9393018 DOI: 10.2147/opth.s372312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 08/01/2022] [Indexed: 11/23/2022] Open
Abstract
Background Preserved prostaglandin analogs (PGAs) have been linked to ocular surface disease (OSD). While the benefits of preservative-low (PL) or -free (PF) Tafluprost (Santen Inc., Japan) were reported in real-world studies in Western countries, this is the first study in Asia to assess the effectiveness and safety of switching from preserved PGA to PL or PF-Tafluprost. Methods We conducted a meta-analysis on studies that included adults (>18 years of age) with a Corneal Fluorescein Staining Score (CFS) >1. These individuals had switched to PL or PF-tafluprost after using a preserved PGA therapy for at least 3 months for glaucoma and were identified from Santen’s tafluprost study database. A total of six studies from South Korea, Philippines, Malaysia, Singapore, Thailand, Taiwan were pooled for analysis. Results An intraocular pressure (IOP) reduction of 5.9% (0.91 mmHg) was seen in 265 patients. However, this result was not statistically significant (95% CI: −3.64, 1.81; Figure 1). Among 132 patients, a 47.9% reduction in the CFS (95% CI: −3.65, −1.91) was seen. Tear film break-up (n=183) significantly increased by 1.06 seconds (95% CI: 0.65, 1.47). In 88 patients, the bulbar conjunctiva score decreased by −0.46 (95% CI: −0.81, −0.10) and palpebral conjunctiva score decreased by −0.42 (95% CI: −0.67–0.17). One or more new adverse reactions were reported in 3% of the individuals after switching. Conclusion Tafluprost IOP reduction is comparable to other PGAs, with significant improvements in the ocular surface and minimal adverse reactions which were already previously reported.
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Affiliation(s)
- Joseph Anthony Tumbocon
- Eye Institute, St. Luke’s Medical Center, Quezon City, Philippines
- Department of Ophthalmology, St. Luke’s Medical Center College of Medicine, Quezon City, Philippines
- Correspondence: Joseph Anthony Tumbocon, Eye Institute, St. Luke’s Medical Center, 279 E Rodriguez Sr. Ave, Quezon City, Metro Manila, 1112, Philippines, Email
| | - Tina T Wong
- Glaucoma Department, Singapore National Eye Centre, Singapore, Singapore
- Cataract & Comprehensive Ophthalmology Department, Singapore Eye Research Institute, Singapore, Singapore
- Ophthalmology & Visual Sciences, Duke-NUS Graduate Medical School, Singapore, Singapore
| | | | - Yung-Chang Yen
- Department of Ophthalmology, Chi Mei Medical Center, Tainan City, Taiwan
| | - Sang-Woo Park
- Department of Ophthalmology, Chonnam National University Medical School and Hospital, Gwangju, South Korea
| | - Hsien Han Lim
- Eye Centre, Sunway Medical Centre, Petaling Jaya, Selangor, Malaysia
| | - Ngamkae Ruangvaravate
- Department of Ophthalmology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Fineide F, Lagali N, Adil MY, Arita R, Kolko M, Vehof J, Utheim TP. Topical glaucoma medications – Clinical implications for the ocular surface. Ocul Surf 2022; 26:19-49. [DOI: 10.1016/j.jtos.2022.07.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 07/21/2022] [Accepted: 07/22/2022] [Indexed: 11/25/2022]
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