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Wang X, Sun Y, Luan C, Yang S, Wang K, Zhang X, Hao R, Zhang W. Effect of hydrogen-rich saline on melanopsin after acute blue light-induced retinal damage in rats. Photochem Photobiol 2024. [PMID: 38634423 DOI: 10.1111/php.13952] [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: 12/30/2023] [Revised: 04/02/2024] [Accepted: 04/05/2024] [Indexed: 04/19/2024]
Abstract
Excessive exposure to blue light can cause retinal damage. Hydrogen-rich saline (HRS), one of the hydrogen therapies, has been demonstrated to be effective in eye photodamage, but the effect on the expression of melanopsin in intrinsically photosensitive retinal ganglion cells (ipRGCs) is unknown. In this study, we used a rat model of light-induced retinal injury to observe the expression of melanopsin after HRS treatment and to determine the effect of HRS on retinal ganglion cell protection. Adult SD rats were exposed to blue light (48 h) and treated with HRS for 0, 3, 7, and 14 days. Real-time polymerase chain reaction (qRT-PCR) and Western blotting (WB) were performed to find the expression of genes and proteins, respectively. The function of retinal ipRGCs was measured by pattern-evoked electroretinography (pERG). The number and morphological changes of melanopsin-positive ganglion cells in the retina were observed by immunofluorescence (IF). Acute blue light exposure caused a decrease in ipRGC function, decreased expression of melanopsin protein and the melanopsin-positive RGCs, and diminished immunoreactivity in dendrites. However, over time, melanopsin showed a tendency to self-recovery, with an increase in melanopsin protein expression and the number of melanopsin-positive RGCs, with incomplete recovery of function within two weeks. HRS treatment accelerated the recovery process, with a significant increase in melanopsin expression and the number of melanopsin-positive RGCs, and an improvement in the pERG waveform within two weeks.
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Affiliation(s)
- Xiao Wang
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Vision Science, Tianjin, P. R. China
- Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, P. R. China
| | - Yifan Sun
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Vision Science, Tianjin, P. R. China
- Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, P. R. China
| | - Changlin Luan
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Vision Science, Tianjin, P. R. China
- Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, P. R. China
| | - Shiqiao Yang
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Vision Science, Tianjin, P. R. China
- Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, P. R. China
| | - Kailei Wang
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Vision Science, Tianjin, P. R. China
- Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, P. R. China
| | - Xiaoran Zhang
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Vision Science, Tianjin, P. R. China
- Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, P. R. China
| | - Rui Hao
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Vision Science, Tianjin, P. R. China
- Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, P. R. China
- Nankai University Eye Institute, Nankai University Affiliated Eye Hospital, Nankai University, Tianjin, P. R. China
| | - Wei Zhang
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Vision Science, Tianjin, P. R. China
- Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, P. R. China
- Nankai University Eye Institute, Nankai University Affiliated Eye Hospital, Nankai University, Tianjin, P. R. China
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Duan H, Yan W. Visual fatigue a comprehensive review of mechanisms of occurrence, animal model design and nutritional intervention strategies. Crit Rev Food Sci Nutr 2023:1-25. [PMID: 38153314 DOI: 10.1080/10408398.2023.2298789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
When the eyes work intensively, it is easy to have eye discomfort such as blurred vision, soreness, dryness, and tearing, that is, visual fatigue. Visual fatigue not only affects work and study efficiency, but long-term visual fatigue can also easily affect physical and mental health. In recent years, with the popularization of electronic products, although it has brought convenience to the office and study, it has also caused more frequent visual fatigue among people who use electronic devices. Moreover, studies have reported that the number of people with visual fatigue is showing a trend of increasing year by year. The range of people involved is also extensive, especially students, people who have been engaged in computer work and fine instruments (such as microscopes) for a long time, and older adults with aging eye function. More and more studies have proposed that supplementation with the proper nutrients can effectively relieve visual fatigue and promote eye health. This review discusses the physiological mechanisms of visual fatigue and the design ideas of animal experiments from the perspective of modern nutritional science. Functional food ingredients with the ability to alleviate visual fatigue are discussed in detail.
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Affiliation(s)
- Hao Duan
- College of Biochemical Engineering, Beijing Key Laboratory of Bioactive Substances and Functional Food, Beijing Union University, Beijing, China
| | - Wenjie Yan
- College of Biochemical Engineering, Beijing Key Laboratory of Bioactive Substances and Functional Food, Beijing Union University, Beijing, China
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Chan YJ, Hsiao G, Wan WN, Yang TM, Tsai CH, Kang JJ, Lee YC, Fang TC, Cheng YW, Li CH. Blue light exposure collapses the inner blood-retinal barrier by accelerating endothelial CLDN5 degradation through the disturbance of GNAZ and the activation of ADAM17. Fluids Barriers CNS 2023; 20:31. [PMID: 37095509 PMCID: PMC10124034 DOI: 10.1186/s12987-023-00430-7] [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: 12/08/2022] [Accepted: 04/07/2023] [Indexed: 04/26/2023] Open
Abstract
Blue light is part of the natural light spectrum that emits high energy. Currently, people are frequently exposed to blue light from 3C devices, resulting in a growing incidence of retinopathy. The retinal vasculature is complex, and retinal vessels not only serve the metabolic needs of the retinal sublayers, but also maintain electrolyte homeostasis by forming the inner blood-retinal barrier (iBRB). The iBRB, which is primarily composed of endothelial cells, has well-developed tight junctions. However, with exposure to blue light, the risks of targeting retinal endothelial cells are currently unknown. We found that endothelial claudin-5 (CLDN5) was rapidly degraded under blue light, coinciding with the activation of a disintegrin and metalloprotease 17 (ADAM17), even at non-cytotoxic lighting. An apparently broken tight junction and a permeable paracellular cleft were observed. Mice exposed to blue light displayed iBRB leakage, conferring attenuation of the electroretinogram b-wave and oscillatory potentials. Both pharmacological and genetic inhibition of ADAM17 remarkably alleviated CLDN5 degradation induced by blue light. Under untreated condition, ADAM17 is sequestered by GNAZ (a circadian-responsive, retina-enriched inhibitory G protein), whereas ADAM17 escapes from GNAZ by blue light illuminance. GNAZ knockdown led to ADAM17 hyperactivation, CLDN5 downregulation, and paracellular permeability in vitro, and retinal damage mimicked blue light exposure in vivo. These data demonstrate that blue light exposure might impair the iBRB by accelerating CLDN5 degradation through the disturbance of the GNAZ-ADAM17 axis.
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Affiliation(s)
- Yen-Ju Chan
- Department of Physiology, School of Medicine, College of Medicine, Taipei Medical University, 250 Wuxing Street, Taipei, 110, Taiwan
- School of Pharmacy, Taipei Medical University, 250 Wuxing Street, Taipei, 110, Taiwan
| | - George Hsiao
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
- TMU Neuroscience Research Center, Taipei Medical University, Taipei, Taiwan
| | - Wang-Nok Wan
- Department of Physiology, School of Medicine, College of Medicine, Taipei Medical University, 250 Wuxing Street, Taipei, 110, Taiwan
| | - Tsung-Min Yang
- Department of Physiology, School of Medicine, College of Medicine, Taipei Medical University, 250 Wuxing Street, Taipei, 110, Taiwan
- School of Pharmacy, Taipei Medical University, 250 Wuxing Street, Taipei, 110, Taiwan
| | - Chi-Hao Tsai
- Department of Ophthalmology, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Jaw-Jou Kang
- Institute of Food Safety and Health Risk Assessment, School of Pharmaceutical Sciences, National Yang Ming Chiao Tung University, Taipei, 112, Taiwan
| | - Yu-Cheng Lee
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Te-Chao Fang
- TMU Research Center of Urology and Kidney, Taipei Medical University, Taipei, Taiwan
- Division of Nephrology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Division of Nephrology, Department of Internal Medicine, Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
| | - Yu-Wen Cheng
- School of Pharmacy, Taipei Medical University, 250 Wuxing Street, Taipei, 110, Taiwan.
- TMU Neuroscience Research Center, Taipei Medical University, Taipei, Taiwan.
| | - Ching-Hao Li
- Department of Physiology, School of Medicine, College of Medicine, Taipei Medical University, 250 Wuxing Street, Taipei, 110, Taiwan.
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan.
- TMU Neuroscience Research Center, Taipei Medical University, Taipei, Taiwan.
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Yang H, Yang K, Zhang L, Yang N, Mei YX, Zheng YL, He Y, Gong YJ, Ding WJ. Acupuncture ameliorates Mobile Phone Addiction with sleep disorders and restores salivary metabolites rhythm. Front Psychiatry 2023; 14:1106100. [PMID: 36896350 PMCID: PMC9989025 DOI: 10.3389/fpsyt.2023.1106100] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 02/03/2023] [Indexed: 02/25/2023] Open
Abstract
OBJECTIVES Mobile Phone Addiction (MPA) is a novel behavioral addiction resulting in circadian rhythm disorders that severely affect mental and physical health. The purpose of this study is to detect rhythmic salivary metabolites in MPA with sleep disorder (MPASD) subjects and investigate the effects of acupuncture. METHODS Six MPASD patients and six healthy controls among the volunteers were enrolled by MPA Tendency Scale (MPATS) and Pittsburgh Sleep Quality Index (PSQI), then the salivary samples of MPASD and healthy controls were collected every 4-h for three consecutive days. Acupuncture was administered for 7 days to MPASD subjects, then saliva samples were collected again. Salivary metabolomes were analyzed with the method of LC-MS. RESULT According to our investigation, 70 (57.85%) MPA patients and 56 (46.28%) MPASD patients were identified among 121 volunteers. The symptoms of the 6 MPASD subjects were significantly alleviated after acupuncture intervention. The number of rhythmic saliva metabolites dropped sharply in MPASD subjects and restored after acupuncture. Representative rhythmic saliva metabolites including melatonin, 2'-deoxyuridine, thymidine, thymidine 3',5'-cyclic monophosphate lost rhythm and restored after acupuncture, which may attribute to promising MPASD treatment and diagnosis biomarkers. The rhythmic saliva metabolites of healthy controls were mainly enriched in neuroactive ligand-receptor interaction, whereas polyketide sugar unit biosynthesis was mainly enriched in MPASD patients. CONCLUSION This study revealed circadian rhythm characteristics of salivary metabolites in MPASD and that acupuncture could ameliorate MPASD by restoring part of the dysrhythmia salivary metabolites.
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Affiliation(s)
- Hong Yang
- School of Medical and Life Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China.,Department of Fundamental Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Kun Yang
- Department of Fundamental Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Lu Zhang
- Department of Fundamental Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Ni Yang
- Department of Fundamental Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Ying-Xiu Mei
- Department of Fundamental Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Ya-Li Zheng
- Department of Fundamental Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yan He
- Department of Fundamental Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yan-Ju Gong
- Department of Fundamental Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Wei-Jun Ding
- Department of Fundamental Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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