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Yan W, He Q, Long P, Chen T, Zhang L, Wang H. Effect of molecular hydrogen, a novelly-established antioxidant, on the retinal degeneration of hereditary retinitis pigmentosa: an in-vivo study. Front Pharmacol 2024; 14:1294315. [PMID: 38638334 PMCID: PMC11025393 DOI: 10.3389/fphar.2023.1294315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 12/05/2023] [Indexed: 04/20/2024] Open
Abstract
Objective Our research was performed in order to explore the effects of molecular hydrogen (H2), a novelly-established antioxidant, on the retinal degeneration in rd1 mice, an animal model of inherited retinitis pigmentosa (RP). Methods The rd1 mice were divided randomly into control and H2 intervention groups. Mice from other groups received H2 intervention in three modes, two modes of the hydrogen gas (HG) and one model of hydrogen-rich saline (HRS). At 14 days post born (P14) and P21, various indicators were detected in all mice, including eletroretinogram (ERG), fundus phography, optical coherence tomography (OCT), and retinal immunotaining of microglia cells' marker, Iba1. Results The ERG amplitude in mice from the control and H2 intervention groups showed no statistical differences (p > 0.05). At P14 and P21, no significant difference in the distance from the retinal pigment epithelium to the outer plexiform layer on OCT from mice of the above two groups was found (p > 0.05). The thickness of the outer nuclear layer (ONL) in mice at P14 and P21 showed no statistical differences between the control group and the H2 intervention group (p > 0.05). In the aspect of the number of Iba1-positive cells, we did not found any significant differences between the two groups (p > 0.05). Conclusion Different forms of H2 intervention (hydrogen-rich saline and hydrogen gas) had no obvious effects on the course of retinal degeneration in rd1 mice. The specific mechanism of photoreceptor degeneration in the hereditary RP mouse model may be different, requiring different medical interventions.
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Affiliation(s)
- Weiming Yan
- The Shaanxi Eye Hospital, Xi’an People’s Hospital, Xi’an Fourth Hospital, Xi’an, China
- The Third Hospital of Zhangzhou, Zhangzhou, China
- Fuzong Clinical Medical College of Fujian Medical University, Dongfang Hospital Affiliated to Xiamen University, Fuzhou, China
| | - Qiurui He
- The Third Hospital of Zhangzhou, Zhangzhou, China
| | - Pan Long
- The General Hospital of Western Theatre Command, PLA, Chengdu, China
| | - Tao Chen
- Center of Clinical Aerospace Medicine, Air Force Military Medical University, Xi’an, China
| | - Lei Zhang
- The Shaanxi Eye Hospital, Xi’an People’s Hospital, Xi’an Fourth Hospital, Xi’an, China
| | - Haiyan Wang
- The Shaanxi Eye Hospital, Xi’an People’s Hospital, Xi’an Fourth Hospital, Xi’an, China
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Chen X, Chen Y, Lin X, Ye Q, Zhang S, Wang Y, Chen M, Yan W. The clinical research on the effect of hydrogen-rich water on primary retinitis pigmentosa. Heliyon 2023; 9:e20671. [PMID: 37860576 PMCID: PMC10582286 DOI: 10.1016/j.heliyon.2023.e20671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 10/04/2023] [Accepted: 10/04/2023] [Indexed: 10/21/2023] Open
Abstract
Objective To investigate the feasibility and effectiveness of hydrogen in the treatment of retinitis pigmentosa (RP) patients through the drinking of hydrogen-rich water (HRW). Methods RP patients clinically diagnosed in our hospital were selected and given HRW for drinking at 400-500 ml twice a day for four consecutive weeks. Changes in best corrected visual acuity (BCVA), intraocular pressure, the retinal thickness, and choroidal thickness, as well as the amplitude and peak time of visual electrophysiological examinations before and after HRW drinking were observed. Data were statistically analyzed. Results In total, 24 eyes of 13 patients with RP (3 males and 10 females aged-27-65 years old, were enrolled in the study. The BCVA after HRW drinking was 0.34 ± 0.25, which was statistically improved compared with that before (P < 0.05). There were no significant differences in intraocular pressure, retinal lhickness, or choroidal thickness before and after HRW drinking (all P > 0.05). The amplitudes of the b-wave in Dark-adaptation 0.01 response, a and b waves in Dark-adaptation 3.0 response, the Dark-adaptation Ops total wave, a and b waves in Light-adaptation 3.0 response, and the Light-adaptation Flicker response of electroretinogram (ERG) were significantly higher than those before HRW drinking (all P < 0.05). The corresponding peak times iwere mproved to some extent compared to those before HRW consumption (all P < 0.05). Six patients with RP (11 eyes) had a BCVAm ore than 20/200. The amplitude and peak time of the P100 -ave from the 1°p attern visual evoked potentials (PVEP) were not significantly different from those before HRW drinking (P > 0.05), while the data from the 15' PVEP were statistically different (P < 0.05). Seven patients with RP (13 eyes) had a BCVA less than. 20/200 No significant differences were found in the amplitude and peak time of the P2 wave from the 1.0 Hz flash visual evoked potentials (FVEP) and the amplitude from the 12 Hz FVEP compared with those before HRW drinking (all P > 0.05). Conclusion Short-term HRW drinking slightly improved visual function in patients with primary RP, whereas no significant improvement was found in the thickness of the retina and choroid.
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Affiliation(s)
| | | | | | - Qian Ye
- Department of Ophthalmology, Fuzong Clinical Medical College of Fujian Medical University (900th Hospital of Joint Logistic Support Force of PLA, Dongfang Hospital Affiliated to Xiamen University), 350025, Fuzhou, China
| | - Sheng Zhang
- Department of Ophthalmology, Fuzong Clinical Medical College of Fujian Medical University (900th Hospital of Joint Logistic Support Force of PLA, Dongfang Hospital Affiliated to Xiamen University), 350025, Fuzhou, China
| | - Yunpeng Wang
- Department of Ophthalmology, Fuzong Clinical Medical College of Fujian Medical University (900th Hospital of Joint Logistic Support Force of PLA, Dongfang Hospital Affiliated to Xiamen University), 350025, Fuzhou, China
| | - Meizhu Chen
- Department of Ophthalmology, Fuzong Clinical Medical College of Fujian Medical University (900th Hospital of Joint Logistic Support Force of PLA, Dongfang Hospital Affiliated to Xiamen University), 350025, Fuzhou, China
| | - Weiming Yan
- Department of Ophthalmology, Fuzong Clinical Medical College of Fujian Medical University (900th Hospital of Joint Logistic Support Force of PLA, Dongfang Hospital Affiliated to Xiamen University), 350025, Fuzhou, China
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Li R, Qu Y, Li X, Tao Y, Yang Q, Wang J, Diao Y, Li Q, Fang Y, Huang Y, Wang L. Molecular Hydrogen Attenuated N-methyl-N-Nitrosourea Induced Corneal Endothelial Injury by Upregulating Anti-Apoptotic Pathway. Invest Ophthalmol Vis Sci 2021; 62:2. [PMID: 34196654 PMCID: PMC8267183 DOI: 10.1167/iovs.62.9.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose Previous work by our group has demonstrated the value of N-methyl-N-nitrosourea (MNU)-induced corneal endothelial decompensation in animal models. The aim of this study was to investigate the effect of molecular hydrogen (H2) on MNU-induced corneal endothelial cell (CEC) injury and the underlying mechanism. Methods MNU-induced animal models of CEC injury were washed with hydrogen-rich saline (HRS) for 14 days. Immunofluorescence staining, immunohistochemical staining, and corneal endothelial assessment were applied to determine architectural and cellular changes on the corneal endothelium following HRS treatment. MNU-induced cell models of CEC injury were co-cultured with H2. The effect of H2 was examined using morphological and functional assays. Results It was shown that MNU could inhibit the proliferation and specific physiological functions of CECs by increasing apoptosis and decreasing the expression of ZO-1 and Na+/K+-ATPase, whereas H2 improved the proliferation and physiological function of CECs by anti-apoptosis. Cell experiments further confirmed that H2 could reverse MNU damage to CECs by decreasing oxidative stress injury, interfering with the NF-κB/NLRP3 pathway and the FOXO3a/p53/p21 pathway. Conclusions This study suggests that topical application of H2 could protect CECs against corneal damage factors through anti-apoptotic effect, reduce the incidence and severity of corneal endothelial decompensation, and maintain corneal transparency.
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Affiliation(s)
- Runpu Li
- Medical School of Chinese PLA, Beijing, China.,Department of Ophthalmology, The Third Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yingxin Qu
- Department of Ophthalmology, Chinese Aerospace 731 Hospital, Beijing, China
| | - Xiaoqi Li
- Medical School of Chinese PLA, Beijing, China.,Department of Ophthalmology, The Third Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Ye Tao
- Department of Ophthalmology, Henan Provincial People's Hospital, Zhengzhou University, Zhengzhou, China
| | - Qinghua Yang
- Department of Ophthalmology, The Third Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Junyi Wang
- Department of Ophthalmology, The Third Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yumei Diao
- Department of Ophthalmology, The Third Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Qian Li
- Department of Ophthalmology, The Third Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yifan Fang
- Medical School of Chinese PLA, Beijing, China.,Department of Ophthalmology, The Third Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yifei Huang
- Department of Ophthalmology, The Third Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Liqiang Wang
- Department of Ophthalmology, The Third Medical Center, Chinese PLA General Hospital, Beijing, China
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Yan W, Long P, Wei D, Yan W, Zheng X, Chen G, Wang J, Zhang Z, Chen T, Chen M. Protection of retinal function and morphology in MNU-induced retinitis pigmentosa rats by ALDH2: an in-vivo study. BMC Ophthalmol 2020; 20:55. [PMID: 32070320 PMCID: PMC7027227 DOI: 10.1186/s12886-020-1330-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 01/24/2020] [Indexed: 12/22/2022] Open
Abstract
Background Retinitis pigmentosa (RP) is a kind of inherited retinal degenerative diseases characterized by the progressive loss of photoreceptors. RP has been a conundrum without satisfactory countermeasures in clinic until now. Acetaldehyde dehydrogenase 2 (ALDH2), a major enzyme involved in aldehyde detoxification, has been demonstrated to be beneficial for a growing number of human diseases, such as cardiovascular dysfunction, diabetes mellitus and neurodegeneration. However, its protective effect against RP remains unknown. Our study explored the impact of ALDH2 on retinal function and structure in N-methyl-N-nitrosourea (MNU)-induced RP rats. Methods Rats were gavaged with 5 mg/kg Alda-1, an ALDH2 agonist, 5 days before and 3 days after MNU administration. Assessments of retinal function and morphology as well as measurement of specific proteins expression level were conducted. Results Electroretinogram recordings showed that Alda-1 administration alleviated the decrease in amplitude caused by MNU, rendering protection of retinal function. Mitigation of photoreceptor degeneration in MNU-treated retinas was observed by optical coherence tomography and retinal histological examination. In addition, Western blotting results revealed that ALDH2 protein expression level was upregulatedwith increased expression of SIRT1 protein after the Alda-1 intervention. Besides, endoplasmic reticulum stress (ERS) was reduced according to the significant downregulation of GRP78 protein, while apoptosis was ameliorated as shown by the decreased expression of PARP1 protein. Conclusions Together, our data demonstrated that ALDH2 could provide preservation of retinal function and morphology against MNU-induced RP, with the underlying mechanism at least partly related to the modulation of SIRT1, ERS and apoptosis.
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Affiliation(s)
- Weiming Yan
- Department of Ophthalmology, The 900th Hospital of Joint Logistic Support Force, PLA (Clinical Medical College of Fujian Medical University, Dongfang Hospital Affiliated to Xiamen University), Fuzhou, 350025, China.,Center of Clinical Aerospace Medicine, Fourth Military Medical University, Xi'an, 710032, China
| | - Pan Long
- Department of Ophthalmology, The West General Hospital of Chinese PLA, Chendu, 610083, China
| | - Dongyu Wei
- Center of Clinical Aerospace Medicine, Fourth Military Medical University, Xi'an, 710032, China
| | - Weihua Yan
- Tong'an No.1 High School of Fujian Province, Xiamen, 361100, China
| | - Xiangrong Zheng
- Department of Ophthalmology, The 900th Hospital of Joint Logistic Support Force, PLA (Clinical Medical College of Fujian Medical University, Dongfang Hospital Affiliated to Xiamen University), Fuzhou, 350025, China
| | - Guocang Chen
- Department of Ophthalmology, The 900th Hospital of Joint Logistic Support Force, PLA (Clinical Medical College of Fujian Medical University, Dongfang Hospital Affiliated to Xiamen University), Fuzhou, 350025, China
| | - Jiancong Wang
- BeiJing HealthOLight Technology Co. Ltd, Beijing, 10010, China
| | - Zuoming Zhang
- Center of Clinical Aerospace Medicine, Fourth Military Medical University, Xi'an, 710032, China.
| | - Tao Chen
- Center of Clinical Aerospace Medicine, Fourth Military Medical University, Xi'an, 710032, China.
| | - Meizhu Chen
- Department of Ophthalmology, The 900th Hospital of Joint Logistic Support Force, PLA (Clinical Medical College of Fujian Medical University, Dongfang Hospital Affiliated to Xiamen University), Fuzhou, 350025, China.
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Long P, Yan W, He M, Zhang Q, Wang Z, Li M, Xue J, Chen T, An J, Zhang Z. Protective effects of hydrogen gas in a rat model of branch retinal vein occlusion via decreasing VEGF-α expression. BMC Ophthalmol 2019; 19:112. [PMID: 31096936 PMCID: PMC6524281 DOI: 10.1186/s12886-019-1105-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 04/10/2019] [Indexed: 01/05/2023] Open
Abstract
Background Oxidative stress (OS) is an essential factor in the pathogenesis of branch retinal vein occlusion (BRVO). Studies have demonstrated the role of hydrogen gas in the regulation of OS. This study was designed to evaluate the efficacy of hydrogen gas on the BRVO rat model. Methods Twenty-four BRVO rats were randomly divided into two groups: the hydrogen gas (H) group (42% H2, 21% O2, 37% N2) and the model (M) group (21% O2, 79% N2). Rats in the H group inhaled hydrogen gas for 8 h every day up to 30 d post-occlusion. Twelve age-matched healthy rats served as the control (C) group. Retinal function and morphology were detected at 1, 7, 14 and 30 d post-occlusion. Furthermore, the expression of vascular endothelial growth factor (VEGF-α) was detected by immunofluorescent staining. Results Full-field electroretinography (ffERG) revealed that the amplitude of the b-wave (dark-adaptation 3.0 response), the amplitude of the OPs2 wave and the light-adapted flicker response in the H group were all higher than those in the M group at 7 d post-occlusion (all p < 0.05). The reopen time of occlusive retinal vessels in the H group was 2.235 ± 1.128 d, which was shorter than that in the M group (4.234 ± 2.236 d, p < 0.05). The rats in the H group had a thinner IPL + GCL + NFL and an increased total retina compared with those in the M group at 3 d post-occlusion (p < 0.05), while the rats in the H group had a thicker INL, IPL + GCL + NFL and total retina compared with those at 7, 14 and 30 d post-occlusion (p < 0.05). Moreover, the flow velocity of ear vein blood was increased in the H group compared with that in the M group (p < 0.05). The expression of VEGF-α in the H group was dramatically decreased compared with that in the M group at 1, 7 and 14 d post-occlusion (p < 0.05), while the expression kept in similar level at 30 d post-occlusion (p > 0.05). Conclusions Our findings demonstrate that inhalation of hydrogen gas could alleviate retinal oedema, shorten reopen time and improve retinal function, and the potential mechanism might be related to a decrease in VEGF-α expression.
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Affiliation(s)
- Pan Long
- Center of Clinical Aerospace Medicine, Fourth Military Medical University, No.169 Changle West Road, Xi'an, 710032, Shaanxi, China
| | - Weiming Yan
- Department of Ophthalmology, The 900th Hospital of the Joint Logistics Team of Chinese PLA, Fuzhou, 350025, Fujian, China
| | - Mengshan He
- Department of Chinese Material Medical and Natural Medicines, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Qianli Zhang
- Company 11 Brigade 4, College of Basic Medicine, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Zhe Wang
- Company 11 Brigade 4, College of Basic Medicine, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Manhong Li
- Department of Ophthalmology of Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Junhui Xue
- Center of Clinical Aerospace Medicine, Fourth Military Medical University, No.169 Changle West Road, Xi'an, 710032, Shaanxi, China
| | - Tao Chen
- Center of Clinical Aerospace Medicine, Fourth Military Medical University, No.169 Changle West Road, Xi'an, 710032, Shaanxi, China.
| | - Jing An
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University, No.76 Yanta Weast Road, Xi'an, 710061, Shaanxi, China.
| | - Zuoming Zhang
- Center of Clinical Aerospace Medicine, Fourth Military Medical University, No.169 Changle West Road, Xi'an, 710032, Shaanxi, China.
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