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Zhang KY, Gao P, Sun G, Zhang T, Li X, Liu S, Zhao Q, Lo KKW, Huang W. Dual-Phosphorescent Iridium(III) Complexes Extending Oxygen Sensing from Hypoxia to Hyperoxia. J Am Chem Soc 2018; 140:7827-7834. [PMID: 29874455 DOI: 10.1021/jacs.8b02492] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Hypoxia and hyperoxia, referring to states of biological tissues in which oxygen supply is in sufficient and excessive, respectively, are often pathological conditions. Many luminescent oxygen probes have been developed for imaging intracellular and in vivo hypoxia, but their sensitivity toward hyperoxia becomes very low. Here we report a series of iridium(III) complexes in which limited internal conversion between two excited states results in dual phosphorescence from two different excited states upon excitation at a single wavelength. Structural manipulation of the complexes allows rational tuning of the dual-phosphorescence properties and the spectral profile response of the complexes toward oxygen. By manipulating the efficiency of internal conversion between the two emissive states, we obtained a complex exhibiting naked-eye distinguishable green, orange, and red emission in aqueous buffer solution under an atmosphere of N2, air, and O2, respectively. This complex is used for intracellular and in vivo oxygen sensing not only in the hypoxic region but also in normoxic and hyperoxic intervals. To the best of our knowledge, this is the first example of using a molecular probe for simultaneous bioimaging of hypoxia and hyperoxia.
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Affiliation(s)
- Kenneth Yin Zhang
- Key Laboratory for Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts & Telecommunications , 9 Wenyuan Road , Nanjing 210023 , P. R. China
| | - Pengli Gao
- Key Laboratory for Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts & Telecommunications , 9 Wenyuan Road , Nanjing 210023 , P. R. China
| | - Guanglan Sun
- Key Laboratory for Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts & Telecommunications , 9 Wenyuan Road , Nanjing 210023 , P. R. China
| | - Taiwei Zhang
- Key Laboratory for Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts & Telecommunications , 9 Wenyuan Road , Nanjing 210023 , P. R. China
| | - Xiangling Li
- Key Laboratory for Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts & Telecommunications , 9 Wenyuan Road , Nanjing 210023 , P. R. China
| | - Shujuan Liu
- Key Laboratory for Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts & Telecommunications , 9 Wenyuan Road , Nanjing 210023 , P. R. China
| | - Qiang Zhao
- Key Laboratory for Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts & Telecommunications , 9 Wenyuan Road , Nanjing 210023 , P. R. China
| | - Kenneth Kam-Wing Lo
- Department of Chemistry , City University of Hong Kong , Tat Chee Avenue , Hong Kong , P. R. China
| | - Wei Huang
- Key Laboratory for Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts & Telecommunications , 9 Wenyuan Road , Nanjing 210023 , P. R. China.,Key Laboratory of Flexible Electronics and Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials , Nanjing Tech University , 30 South Puzhu Road , Nanjing 211816 , P. R. China
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102
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Chen X, Li SM, Li YW, Han ZH, Liang H. Effect of senescence marker protein 30 on the proliferation and apoptosis of human lens epithelial cells SRA01/04. Int J Ophthalmol 2018; 11:553-558. [PMID: 29675370 DOI: 10.18240/ijo.2018.04.03] [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: 08/22/2017] [Accepted: 03/01/2018] [Indexed: 11/23/2022] Open
Abstract
AIM To study the effect of senescence marker protein 30 (SMP30) on the proliferation and apoptosis of human lens epithelial cell (HLEC) SRA01/04. METHODS SMP30 overexpression (OE) and knock down (KD) type cell lines were cultivated by using two groups regucalcin (RGN; SMP30) lentiviral vectors (LV-RGN, LV-RGN-RNAi) and the respective negative control virus infect SRA01/04 cells. Western blot and real-time quantitative polymerase chain reaction (q-PCR) analysis were used to determine RGN overexpression and knock down efficiency. We use cell counting kit-8 (CCK8) assay to measure cell viability and 5-bromodeoxyuridine (BrdU) assay to test cell proliferation. Cell cycle was measured by PI FACS assay and cell apoptosis was tested by Annexin V-APC assay through flow cytometry. We use Western blot to measure the content of caspase-3 in SRA01/04. RESULTS We used PCR and Western blot techniques to determine the successful transfection of SMP30 OE and KD SRA01/04 cell lines. By CCK8, Brdu and PI FACS cell cycle assay, it was found that the SMP30 OE group promoted cell proliferation (P<0.05) compared with the control group, and the KD group inhibited cell proliferation (P<0.05). The results of Annexin V-APC signal staining detection indicated that compared with respective control group, the cell apoptosis rate was higher in KD group (P<0.05) but lower in OE group (P<0.01). The expression of caspase-3 was down-regulated in OE group through Western blot assay and up-regulated in KD group compared with respective control group. CONCLUSION Proliferation of SRA01/04 was promoted by SMP30 OE and apoptosis was suppressed. Increasing the expression of SMP30 may protect HLEC SRA01/04 against apoptosis in cataract.
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Affiliation(s)
- Xi Chen
- Department of Ophthalmology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Song-Man Li
- Department of Ophthalmology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Yan-Wei Li
- Department of Ophthalmology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Zi-Hao Han
- Department of Ophthalmology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Hao Liang
- Department of Ophthalmology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
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103
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Wang S, Guo C, Yu M, Ning X, Yan B, Zhao J, Yang A, Yan H. Identification of H 2O 2 induced oxidative stress associated microRNAs in HLE-B3 cells and their clinical relevance to the progression of age-related nuclear cataract. BMC Ophthalmol 2018; 18:93. [PMID: 29653565 PMCID: PMC5899325 DOI: 10.1186/s12886-018-0766-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 04/03/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND This study is aimed to screen out the microRNAs (miRNAs) associated with H2O2 induced oxidative stress in human lens epithelial B3 (HLE-B3) cell lines and investigate their relations with the progression of age-related nuclear cataract. METHODS H2O2 was used to induce oxidative stress in HLE-B3 cells. A genome-wide expression profiling of miRNAs in HLE-B3 cells was performed to select the differentially expressed miRNAs before and after H2O2 treatment. The selected miRNAs were validated by RT-PCR and fluorescence in situ hybridization (FISH). Clinical specimens were divided into three groups according to the Lens Opacities Classification System III (LOCSIII) and the expression levels of the selected miRNAs were tested by RT-PCR in the three groups. Bioinformatics analyses were applied to predict the target genes of the miRNA hits and construct the miRNA regulatory network. The expression level of MAPK14 was analyzed by Western blot. RESULTS The H2O2 induced oxidative stress model of HLE-B3 cells was established. Nineteen upregulated and 30 downregulated miRNAs were identified as differentially expressed miRNAs. Seven of the total 49 were validated in the cell model. RT-PCR of the clinical samples showed that the expression levels of miR-34a-5p, miR-630 and miR-335-3p were closely related with the severity of nuclear opacity. The images taken from FISH confirmed the results of RT-PCR. There were 172 target genes of the three miRNAs clustered in the category of response to stress. The regulatory network demonstrated that 23 target genes were co-regulated by multiple miRNAs. MAPK14 was the target gene of three miRNAs and the result were verified by Western blot. CONCLUSION Up-regulation of miR-34a-5p and miR-630 and down-regulation of miR-335-3p are related with the progression of age-related nuclear cataract and the underlying mechanism awaits further functional research to reveal.
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Affiliation(s)
- Song Wang
- Department of Ophthalmology, Tangdu Hospital, Fourth Military Medical University, 1 Xinsi Road, Xi'an, Shaanxi, 710038, People's Republic of China
| | - Chenjun Guo
- Department of Ophthalmology, Tangdu Hospital, Fourth Military Medical University, 1 Xinsi Road, Xi'an, Shaanxi, 710038, People's Republic of China
| | - Mengsi Yu
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, 169 West Changle Road, Xi'an, Shaanxi, 710032, People's Republic of China
| | - Xiaona Ning
- Department of Ophthalmology, Tangdu Hospital, Fourth Military Medical University, 1 Xinsi Road, Xi'an, Shaanxi, 710038, People's Republic of China
| | - Bo Yan
- The State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, 169 West Changle Road, Xi'an, Shaanxi, 710032, People's Republic of China
| | - Jing Zhao
- The State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, 169 West Changle Road, Xi'an, Shaanxi, 710032, People's Republic of China
| | - Angang Yang
- The State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, 169 West Changle Road, Xi'an, Shaanxi, 710032, People's Republic of China
| | - Hong Yan
- Department of Ophthalmology, Tangdu Hospital, Fourth Military Medical University, 1 Xinsi Road, Xi'an, Shaanxi, 710038, People's Republic of China. .,Chongqing Key Laboratory of Ophthalmology and Chongqing Eye Institute, The First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Chongqing, 400016, People's Republic of China.
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104
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Boroumand F, Mahmoudinasab H, Saadat M. Association of the SOD2 (rs2758339 and rs5746136) polymorphisms with the risk of heroin dependency and the SOD2 expression levels. Gene 2018; 649:27-31. [DOI: 10.1016/j.gene.2018.01.074] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 01/07/2018] [Accepted: 01/22/2018] [Indexed: 12/17/2022]
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105
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Choi YH, Park SJ, Paik HJ, Kim MK, Wee WR, Kim DH. Unexpected potential protective associations between outdoor air pollution and cataracts. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:10636-10643. [PMID: 29388156 DOI: 10.1007/s11356-018-1266-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 01/11/2018] [Indexed: 06/07/2023]
Abstract
Air pollution is one of the biggest public health issues, and the eye is continuously exposed to multiple outdoor air pollution. However, to date, no large-scale study has assessed the relationship between air pollutants and cataracts. We investigated associations between outdoor air pollution and cataracts in the Korean population. A population-based cross-sectional study was performed using data from the Korea National Health and Nutrition Examination Survey, including 18,622 adults more than 40 years of age. The presence of cataracts and their subtypes were evaluated by ophthalmologists. Air pollution data (levels of particulate matter, ozone, nitrogen dioxide, and sulfur dioxide) for the 2 years prior to the ocular examinations were collected from national monitoring stations. The associations of multiple air pollutants with cataracts were assessed by multivariate logistic regression analyses. Sociodemographic factors and previously known risk factors for cataracts were controlled as covariates (model 1 included sociodemographic factors, sun exposure, and behavioral factors, while model 2 further included clinical factors). Higher ozone concentrations were protectively associated with overall cataract which included all subtypes [single pollutant model: 0.003 ppm increase-model 1 (OR 0.89, p = 0.014), model 2 (OR 0.87, p = 0.011); multi-pollutant model: 0.003 ppm increase-model 1 (OR 0.80, p = 0.002), model 2 (OR 0.87, p = 0.002)]. Especially, higher ozone concentrations showed deeply protective association with nuclear cataract subtype [0.003 ppm increase-single pollutant model: model 2 (OR 0.84, p = 0.006), multi-pollutant model: model 2 (OR 0.73, p < 0.001)]. Higher tropospheric ozone concentrations showed protective associations with overall cataract and nuclear cataract subtype in the Korean population.
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Affiliation(s)
- Yoon-Hyeong Choi
- Department of Preventive Medicine, Gachon University College of Medicine, Incheon, Korea
| | - Su Jin Park
- Department of Ophthalmology, Gachon University Gil Medical Center, Incheon, Korea
| | - Hae Jung Paik
- Department of Ophthalmology, Gachon University Gil Medical Center, Incheon, Korea
| | - Mee Kum Kim
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Korea
| | - Won Ryang Wee
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Korea
| | - Dong Hyun Kim
- Department of Ophthalmology, Gachon University Gil Medical Center, Incheon, Korea.
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106
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Lu B, Christensen IT, Ma LW, Yu T, Jiang LF, Wang CX, Feng L, Zhang JS, Yan QC, Wang XL. miR-211 regulates the antioxidant function of lens epithelial cells affected by age-related cataracts. Int J Ophthalmol 2018; 11:349-353. [PMID: 29600165 DOI: 10.18240/ijo.2018.03.01] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 01/10/2018] [Indexed: 02/05/2023] Open
Abstract
AIM To investigate the effects and mechanism of miR-211 in mediating the antioxidant function of lens epithelial cells affected by age-related cataracts. METHODS Real-time quantitative polymerase chain reaction (RT-qPCR) was used to detect miR-211 expression in the anterior lens capsules of healthy people, the anterior lens capsules of patients with age-related cataracts, and human epithelial cell line (SRA01/04) cells exposed to oxidative stress. A 2', 7'-dichloro-fluorescein diacetate (DCFH-DA) probe was used to measure the levels of endogenous reactive oxygen species (ROS) in human lens epithelial cells (hLECs) exposed to 400 µmol/L H2O2 for 1h. SRA01/04 cells were transfected with either miR-211 mimics, mimic controls, miR-211 inhibitors or inhibitor controls. After 72h, these cells were exposed to 400 µmol/L H2O2 for 1h, then p53 and Bax mRNA expression were measured using RT-qPCR. p53 and Bax protein expression were also measured by Western blotting analysis. Finally, cell viability was assessed using an MTS assay. RESULTS Compared to the control group, expression of miR-211 in the anterior lens capsules of age-related cataract patients and in SRA01/04 cells exposed to oxidative stress was significantly increased (P<0.001). Levels of endogenous ROS were significantly elevated in hLECs exposed to oxidative stress (P<0.001). Compared to the mimic control group, the hLECs in the miR-211 mimic group expressed significantly higher levels of p53 and Bax mRNA and protein while cell viability was significantly reduced (P<0.001). Conversely, p53 and Bax mRNA and protein expression were significantly reduced in the miR-211 inhibitor group as compared to the control group, while the cells in this group had much higher levels of cell viability (P<0.001). CONCLUSION miR-211 is upregulated in the anterior lens capsules of age-related cataract patients. miR-211 decreased the antioxidative stress capacity of lens epithelial cells by upregulating p53 and Bax, while inhibiting cell proliferation and repair. This finding suggests that miR-211 may play a key role in the development of age-related cataracts.
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Affiliation(s)
- Bo Lu
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province, Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Ian T Christensen
- University of Utah School of Medicine, Salt Lake City, Utah 84132, USA
| | - Li-Wei Ma
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province, Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Tao Yu
- Department of Medical Imaging, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, Shenyang 110042, Liaoning Province, China
| | - Ling-Feng Jiang
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province, Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Chun-Xia Wang
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province, Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Li Feng
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province, Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Jin-Song Zhang
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province, Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Qi-Chang Yan
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province, Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Xin-Ling Wang
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province, Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
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107
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Zhao WJ, Yan YB. Increasing susceptibility to oxidative stress by cataract-causing crystallin mutations. Int J Biol Macromol 2018; 108:665-673. [DOI: 10.1016/j.ijbiomac.2017.12.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 12/01/2017] [Accepted: 12/04/2017] [Indexed: 11/24/2022]
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108
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Thrimawithana TR, Rupenthal ID, Räsch SS, Lim JC, Morton JD, Bunt CR. Drug delivery to the lens for the management of cataracts. Adv Drug Deliv Rev 2018; 126:185-194. [PMID: 29604375 DOI: 10.1016/j.addr.2018.03.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 03/02/2018] [Accepted: 03/20/2018] [Indexed: 11/16/2022]
Abstract
Cataracts are one of the most prevalent diseases of the lens, affecting its transparency and are the leading cause of reversible blindness in the world. The clarity of the lens is essential for its normal physiological function of refracting light onto the retina. Currently there is no pharmaceutical treatment for prevention or cure of cataracts and surgery to replace the affected lens remains the gold standard in the management of cataracts. Pharmacological treatment for prevention of cataracts is hindered by many physiological barriers that must be overcome by a therapeutic agent to reach the avascular lens. Various therapeutic agents and formulation strategies are currently being investigated to prevent cataract formation as access to surgery is limited. This review provides a summary of recent research in the field of drug delivery to the lens for the management of cataracts including models used to study cataract treatments and discusses the future perspectives in the field.
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Affiliation(s)
- Thilini R Thrimawithana
- Discipline of Pharmacy, School Health and Biomedical Sciences, RMIT University, Bundoora, VIC 3083, Australia.
| | - Ilva D Rupenthal
- Buchanan Ocular Therapeutics Unit, Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Simon S Räsch
- Buchanan Ocular Therapeutics Unit, Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Julie C Lim
- Department of Physiology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - James D Morton
- Faculty of Agricultural Sciences, Lincoln University, P O Box 85084, New Zealand
| | - Craig R Bunt
- Faculty of Agricultural Sciences, Lincoln University, P O Box 85084, New Zealand
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Lu B, Christensen IT, Ma LW, Wang XL, Jiang LF, Wang CX, Feng L, Zhang JS, Yan QC. miR-24-p53 pathway evoked by oxidative stress promotes lens epithelial cell apoptosis in age-related cataracts. Mol Med Rep 2018; 17:5021-5028. [PMID: 29393409 PMCID: PMC5865963 DOI: 10.3892/mmr.2018.8492] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Accepted: 01/16/2018] [Indexed: 12/20/2022] Open
Abstract
MicroRNA-24 (miR-24) serves an important role in cell proliferation, migration and inflammation in various types of disease. In the present study, the biological function and molecular mechanism of miR-24 was investigated in association with the progression of age-associated cataracts. To the best of our knowledge the present study is the first to report that the expression of miR-24 was significantly increased in human anterior lens capsules affected by age-associated cataracts as well as lens epithelial cells (LECs) exposed to oxidative stress. Overexpression of miR-24 induced p53 expression and p53 was verified as a direct target of miR-24. Overexpression of miR-24 enhanced LEC death by directly targeting p53. The present study revealed that oxidative stress induced the upregulation of miR-24 and enhanced LEC death by directly targeting p53. These results suggest that the miR-24-p53 signaling pathway is involved in a novel mechanism of age-associated cataractogenesis and miR-24 may be a useful therapeutic target for age-associated cataracts.
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Affiliation(s)
- Bo Lu
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang, Liaoning 110005, P.R. China
| | - Ian T Christensen
- The School of Medicine, University of Utah, Salt Lake, UT 84132, USA
| | - Li-Wei Ma
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang, Liaoning 110005, P.R. China
| | - Xin-Ling Wang
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang, Liaoning 110005, P.R. China
| | - Ling-Feng Jiang
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang, Liaoning 110005, P.R. China
| | - Chun-Xia Wang
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang, Liaoning 110005, P.R. China
| | - Li Feng
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang, Liaoning 110005, P.R. China
| | - Jin-Song Zhang
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang, Liaoning 110005, P.R. China
| | - Qi-Chang Yan
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang, Liaoning 110005, P.R. China
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110
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Nuzzi R, Scalabrin S, Becco A, Panzica G. Gonadal Hormones and Retinal Disorders: A Review. Front Endocrinol (Lausanne) 2018; 9:66. [PMID: 29551993 PMCID: PMC5840201 DOI: 10.3389/fendo.2018.00066] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 02/14/2018] [Indexed: 12/27/2022] Open
Abstract
AIM Gonadal hormones are essential for reproductive function, but can act on neural and other organ systems, and are probably the cause of the large majority of known sex differences in function and disease. The aim of this review is to provide evidence for this hypothesis in relation to eye disorders and to retinopathies in particular. METHODS Epidemiological studies and research articles were reviewed. RESULTS Analysis of the biological basis for a relationship between eye diseases and hormones showed that estrogen, androgen, and progesterone receptors are present throughout the eye and that these steroids are locally produced in ocular tissues. Sex hormones can have a neuroprotective action on the retina and modulate ocular blood flow. There are differences between the male and the female retina; moreover, sex hormones can influence the development (or not) of certain disorders. For example, exposure to endogenous estrogens, depending on age at menarche and menopause and number of pregnancies, and exposure to exogenous estrogens, as in hormone replacement therapy and use of oral contraceptives, appear to protect against age-related macular degeneration (both drusenoid and neurovascular types), whereas exogenous testosterone therapy is a risk factor for central serous chorioretinopathy. Macular hole is more common among women than men, particularly in postmenopausal women probably owing to the sudden drop in estrogen production in later middle age. Progestin therapy appears to ameliorate the course of retinitis pigmentosa. Diabetic retinopathy, a complication of diabetes, may be more common among men than women. CONCLUSION We observed a correlation between many retinopathies and sex, probably as a result of the protective effect some gonadal hormones may exert against the development of certain disorders. This may have ramifications for the use of hormone therapy in the treatment of eye disease and of retinal disorders in particular.
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Affiliation(s)
- Raffaele Nuzzi
- Eye Clinic, Department of Surgical Sciences, University of Turin, Turin, Italy
- *Correspondence: Raffaele Nuzzi,
| | - Simona Scalabrin
- Eye Clinic, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Alice Becco
- Eye Clinic, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Giancarlo Panzica
- Laboratory of Neuroendocrinology, Department of Neuroscience Rita Levi-Montalcini, University of Torino, Torino, Italy
- Neuroscience Institute Cavalieri-Ottolenghi (NICO), Orbassano, Italy
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111
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Guest PC. 2D-DIGE Analysis of Eye Lens Proteins as a Measure of Cataract Formation. Methods Mol Biol 2018; 1735:427-437. [PMID: 29380333 DOI: 10.1007/978-1-4939-7614-0_30] [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] [Indexed: 06/07/2023]
Abstract
This chapter describes the basics of two-dimensional difference gel electrophoresis (2D-DIGE) for multiplex analysis of two distinct proteomes. The example given describes the analysis of male and female rat lens soluble proteins labeled with fluorescent Cy3 and Cy5 dyes in comparison to a pooled standard labeled with Cy2. After labeling the proteomes are mixed together and electrophoresed on the same 2D gels. Scanning the gels at wavelengths specific for each dye allows direct overlay the two different proteomes. Differences in abundance of specific protein spots can be determined through comparison to the pooled standard.
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Affiliation(s)
- Paul C Guest
- Laboratory of Neuroproteomics, Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil.
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112
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Turgut B, Ergen İ, İlhan N. The Protective Effect of Sesamol in the Selenite-induced Experimental Cataract Model. Turk J Ophthalmol 2017; 47:309-314. [PMID: 29326846 PMCID: PMC5758764 DOI: 10.4274/tjo.42385] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 04/07/2017] [Indexed: 12/01/2022] Open
Abstract
Objectives: To investigate the potential protective effects of sesamol in an experimental cataract model. Materials and Methods: Twenty-one Spraque Dawley rat pups were randomly assigned into three groups, seven rats in each. All the rats except for those in the control group were injected subcutaneously with a single dose of sodium selenite on postpartum day 9. On days 10-14, rats in the sham group were intraperitoneally administered 50 mg/kg/day saline solution, while rats in the sesamol group were given 50 mg/kg/day sesamol by the same route. Following cataract grading, the lenses and capsules were extracted and the mean levels of reduced glutathione (GSH), malondialdehyde (MDA), total antioxidant status (TAS) and total oxidant status (TOS) in lens supernatants were biochemically analyzed. Results: The control group did not show any development of cataract. It was found that the mean cataract grade in the sesamol group was significantly lower than that of the sham group (p<0.05). The mean GSH level and TAS in the sesamol group were significantly higher than those of the sham group while the mean TOS and MDA level in the sesamol group were significantly lower than those of the sham group (p<0.05). Conclusion: Our study shows that sesamol reduces TOS and MDA level and increases TAS and GSH level in the lens and inhibits cataract formation.
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Affiliation(s)
- Burak Turgut
- Yüksek İhtisas University Faculty of Medicine, Department of Ophthalmology, Ankara, Turkey
| | - İrfan Ergen
- University of Health Sciences, Dışkapı Yıldırım Beyazıt Training and Research Hospital, Department of Ophthalmology, Ankara, Turkey
| | - Nevin İlhan
- Fırat University Faculty of Medicine, Department of Biochemistry, Elazığ, Turkey
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Phaswana-Mafuya N, Peltzer K, Crampin A, Ahame E, Sokhela Z. Prevalence of Self-Reported Diagnosed Cataract and Associated Risk Factors among Elderly South Africans. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14121523. [PMID: 29211038 PMCID: PMC5750941 DOI: 10.3390/ijerph14121523] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/29/2017] [Accepted: 11/30/2017] [Indexed: 11/24/2022]
Abstract
This paper estimates the prevalence of self-reported cataract and associated risk factors among individuals aged ≥50 years in South Africa. Data from a nationally-representative cross-sectional Study on Global AGEing and Adult Health (SAGE) (N = 3646) conducted in South Africa from 2007–2008 was analyzed. The primary outcome was self-reported cataract, and exposures included socio-demographics, self-reported co-morbidities, and behavioral factors. Linearized multivariate logistic regression models were used. The weighted prevalence of self-reported diagnosed cataract was 4.4% (95%CI: 3.4–5.8). Prevalence was greater among individuals with advancing age (10.2%), higher quality of life (QoL) (5.9%), education (5.2%), and wealth (5.8%) than their counterparts. Prevalence was also higher among individuals with depression (17.5%), diabetes (13.3%), hypertension (9.1%), and stroke (8.4%) compared to those without these conditions, with the exception of obesity (4.2%). In the final multivariate model, the odds of self-reported cataract were: 4.14 times higher among people ≥70 years than 50 to 59 year olds (95%CI: 2.28–7.50); 2.48 times higher in urban than rural residents (95%CI: 1.25–4.92); 5.16, 2.99, and 1.97 times higher for individuals with depression (95%CI: 1.92–13.86), hypertension (95%CI: 1.60–5.59), and diabetes (95%CI: 1.07–3.61), compared to those without these conditions.
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Affiliation(s)
- Nancy Phaswana-Mafuya
- Office of the Deputy Vice Chancellor: Research and Innovation, North West University, Potchefstroom 2520, South Africa.
- HIV/AIDS/STI/TB Research Programme, Human Sciences Research Council, Pretoria 0002, South Africa.
| | - Karl Peltzer
- HIV/AIDS/STI/TB Research Programme, Human Sciences Research Council, Pretoria 0002, South Africa.
- Department of Research & Innovation, University of Limpopo, Turfloop 0727, South Africa.
| | - Amelia Crampin
- London School of Hygiene and Tropical Medicine, University of London, London WC1E 7HT, UK.
| | - Edmund Ahame
- HIV/AIDS/STI/TB Research Programme, Human Sciences Research Council, Pretoria 0002, South Africa.
- Office of the Deputy Vice Chancellor for Research and Engagement, Nelson Mandela University, Port Elizabeth 6001, South Africa.
| | - Zinhle Sokhela
- HIV/AIDS/STI/TB Research Programme, Human Sciences Research Council, Pretoria 0002, South Africa.
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114
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Zhu XJ, Zhang KK, He WW, Du Y, Hooi M, Lu Y. Racemization at the Asp 58 residue in αA-crystallin from the lens of high myopic cataract patients. J Cell Mol Med 2017; 22:1118-1126. [PMID: 28994184 PMCID: PMC5783843 DOI: 10.1111/jcmm.13363] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 07/19/2017] [Indexed: 01/25/2023] Open
Abstract
Post-translational modifications in lens proteins are key causal factors in cataract. As the most abundant post-translational modification in the lens, racemization may be closely related to the pathogenesis of cataract. Racemization of αA-crystallin, a crucial structural and heat shock protein in the human lens, could significantly influence its structure and function. In previous studies, elevated racemization from l-Asp 58 to d-isoAsp58 in αA-crystallin has been found in age-related cataract (ARC) lenses compared to normal aged human lenses. However, the role of racemization in high myopic cataract (HMC), which is characterized by an early onset of nuclear cataract, remains unknown. In the current study, apparently different from ARC, significantly increased racemization from l-Asp 58 to d-Asp 58 in αA-crystallin was identified in HMC lenses. The average racemization rates for each Asp isoform were calculated in ARC and HMC group. In ARC patients, the conversion of l-Asp 58 to d-isoAsp 58, up to 31.89%, accounted for the main proportion in racemization, which was in accordance with the previous studies. However, in HMC lenses, the conversion of l-Asp 58 to d-Asp 58, as high as 35.44%, accounted for the largest proportion of racemization in αA-crystallin. The different trend in the conversion of αA-crystallin by racemization, especially the elevated level of d-Asp 58 in HMC lenses, might prompt early cataractogenesis and a possible explanation of distinct phenotypes of cataract in HMC.
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Affiliation(s)
- Xiang-Jia Zhu
- Eye Institute, Eye and ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Ophthalmology, Eye and ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Key Laboratory of Myopia, Ministry of Health PR China, Shanghai, China.,Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai Medical College, Fudan University, Shanghai, China
| | - Ke-Ke Zhang
- Eye Institute, Eye and ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Ophthalmology, Eye and ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Key Laboratory of Myopia, Ministry of Health PR China, Shanghai, China.,Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai Medical College, Fudan University, Shanghai, China
| | - Wen-Wen He
- Eye Institute, Eye and ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Ophthalmology, Eye and ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Key Laboratory of Myopia, Ministry of Health PR China, Shanghai, China.,Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yu Du
- Eye Institute, Eye and ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Ophthalmology, Eye and ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Key Laboratory of Myopia, Ministry of Health PR China, Shanghai, China.,Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai Medical College, Fudan University, Shanghai, China
| | | | - Yi Lu
- Eye Institute, Eye and ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Ophthalmology, Eye and ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Key Laboratory of Myopia, Ministry of Health PR China, Shanghai, China.,Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai Medical College, Fudan University, Shanghai, China
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115
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Periyasamy P, Shinohara T. Age-related cataracts: Role of unfolded protein response, Ca 2+ mobilization, epigenetic DNA modifications, and loss of Nrf2/Keap1 dependent cytoprotection. Prog Retin Eye Res 2017; 60:1-19. [PMID: 28864287 PMCID: PMC5600869 DOI: 10.1016/j.preteyeres.2017.08.003] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 08/26/2017] [Accepted: 08/28/2017] [Indexed: 12/11/2022]
Abstract
Age-related cataracts are closely associated with lens chronological aging, oxidation, calcium imbalance, hydration and crystallin modifications. Accumulating evidence indicates that misfolded proteins are generated in the endoplasmic reticulum (ER) by most cataractogenic stresses. To eliminate misfolded proteins from cells before they can induce senescence, the cells activate a clean-up machinery called the ER stress/unfolded protein response (UPR). The UPR also activates the nuclear factor-erythroid-2-related factor 2 (Nrf2), a central transcriptional factor for cytoprotection against stress. Nrf2 activates nearly 600 cytoprotective target genes. However, if ER stress reaches critically high levels, the UPR activates destructive outputs to trigger programmed cell death. The UPR activates mobilization of ER-Ca2+ to the cytoplasm and results in activation of Ca2+-dependent proteases to cleave various enzymes and proteins which cause the loss of normal lens function. The UPR also enhances the overproduction of reactive oxygen species (ROS), which damage lens constituents and induce failure of the Nrf2 dependent cytoprotection. Kelch-like ECH-associated protein 1 (Keap1) is an oxygen sensor protein and regulates the levels of Nrf2 by the proteasomal degradation. A significant loss of DNA methylation in diabetic cataracts was found in the Keap1 promoter, which overexpresses the Keap1 protein. Overexpressed Keap1 significantly decreases the levels of Nrf2. Lower levels of Nrf2 induces loss of the redox balance toward to oxidative stress thereby leading to failure of lens cytoprotection. Here, this review summarizes the overall view of ER stress, increases in Ca2+ levels, protein cleavage, and loss of the well-established stress protection in somatic lens cells.
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Affiliation(s)
- Palsamy Periyasamy
- Department of Ophthalmology and Visual Sciences, University of Nebraska Medical Center, Omaha, NE 68198, USA; Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE 68198, USA.
| | - Toshimichi Shinohara
- Department of Ophthalmology and Visual Sciences, University of Nebraska Medical Center, Omaha, NE 68198, USA
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116
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Salehi Z, Gholaminia Z, Gholaminia M, Panjtanpanah M. Heat shock protein polymorphisms provide age-related cataract susceptibility for the population of Northern Iran. Meta Gene 2017. [DOI: 10.1016/j.mgene.2017.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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117
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Wu C, Liu Z, Ma L, Pei C, Qin L, Gao N, Li J, Yin Y. MiRNAs regulate oxidative stress related genes via binding to the 3' UTR and TATA-box regions: a new hypothesis for cataract pathogenesis. BMC Ophthalmol 2017; 17:142. [PMID: 28806956 PMCID: PMC5556341 DOI: 10.1186/s12886-017-0537-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 08/01/2017] [Indexed: 12/02/2022] Open
Abstract
Background Age-related cataracts are related to oxidative stress. However, the genome-wide screening of cataract related oxidative stress related genes are not thoroughly investigated. Our study aims to identify cataract regulated miRNA target genes that are related to oxidative stress and to propose a new possible mechanism for cataract formation. Methods Microarrays were used to determine the mRNA expression profiles of both transparent and cataractous lenses. The results were analyzed by significance analyses performed by the microarray software, and bioinformatics analysis was further conducted using Molecular Annotation System. The Eukaryotic Promoter Database (EPD) was used to retrieve promoter sequences and identify TATA-box motifs. Online resource miRWalk was exploited to screen for validated miRNAs targeting mRNAs related to oxidative stress. RNAhybrid online tool was applied to predict the binding between significantly regulated miRNAs in cataract lenses and target mRNAs. Results Oxidative stress pathway was significantly regulated in cataractous lens samples. Pro-oxidative genes were half up-regulated (11/20), with a small number of genes down-regulated (4/20) and the rest of them with no significant change (5/20). Anti-oxidative genes were partly up-regulated (17/69) and partly down-regulated (17/69). Four down-regulated miRNAs (has-miR-1207-5p, has-miR-124-3p, has-miR-204-3p, has-miR-204-5p) were found to target 3′ UTR of pro-oxidative genes and could also bind to the TATA-box regions of anti-oxidative genes (with the exception of has-miR-204-3p), whilst two up-regulated miRNAs (has-miR-222-3p, has-miR-378a-3p) were found to target 3′ UTR of anti-oxidative genes and could simultaneously bind to the TATA-box regions of pro-oxidative genes. Conclusions We propose for the first time a hypothesis that cataract regulated miRNAs could contribute to cataract formation not only by targeting 3′ UTR but also by targeting TATA-box region of oxidative stress related genes. This results in the subsequent elevation of pro-oxidative genes and inhibition of anti-oxidative genes. This miRNA-TATA-box/3′ UTR-gene-regulation network may contribute to cataract pathogenesis. Electronic supplementary material The online version of this article (doi:10.1186/s12886-017-0537-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Changrui Wu
- Department of Ophthalmology, the First Affiliated Hospital of Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710061, China
| | - Zhao Liu
- Department of Ophthalmology, the First Affiliated Hospital of Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710061, China
| | - Le Ma
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi Province, 710061, China
| | - Cheng Pei
- Department of Ophthalmology, the First Affiliated Hospital of Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710061, China
| | - Li Qin
- Department of Ophthalmology, the First Affiliated Hospital of Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710061, China
| | - Ning Gao
- Department of Ophthalmology, the First Affiliated Hospital of Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710061, China
| | - Jun Li
- Basic Research Center, Affiliated Shaanxi Provincial Tumor Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710061, China
| | - Yue Yin
- Basic Research Center, Affiliated Shaanxi Provincial Tumor Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710061, China.
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118
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Suppression of presbyopia progression with pirenoxine eye drops: experiments on rats and non-blinded, randomized clinical trial of efficacy. Sci Rep 2017; 7:6819. [PMID: 28754903 PMCID: PMC5533700 DOI: 10.1038/s41598-017-07208-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 06/26/2017] [Indexed: 11/10/2022] Open
Abstract
Various methods can correct presbyopia, but all require devices or surgeries. Recently, supplements or warming devices to relieve presbyopic symptoms have been developed, but no eye drops have been developed. We screened certain compounds possibly related to lens degeneration and identified pirenoxine, which has been used for cataracts, as a possible new pharmacologic treatment for presbyopia. We first researched the anti-presbyopic activity of pirenoxine in rats. The lens elasticity significantly (p = 0.028) increased with exposure to tobacco smoke for 12 days, and pirenoxine eye drops significantly (p < 0.001) suppressed lens hardening, which causes presbyopia in humans. In a parallel randomized controlled clinical study of the subjects in their fifth decade of life, the objective accommodative amplitude (AA) decreased significantly (p < 0.01) by 0.16 diopter (D) in the control group, and there was no detectable change in the treatment group after a 6-month treatment period, suggesting that pirenoxine eye drops might prevent progression of presbyopia. Subjects in their sixth decade of life, in whom the AA was already nearly 0 D, did not show similar results. Pirenoxine eye drops might be a new and the first pharmacologic treatment for preventing progression of presbyopia.
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119
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Jia YP, Sun L, Yu HS, Liang LP, Li W, Ding H, Song XB, Zhang LJ. The Pharmacological Effects of Lutein and Zeaxanthin on Visual Disorders and Cognition Diseases. Molecules 2017; 22:E610. [PMID: 28425969 PMCID: PMC6154331 DOI: 10.3390/molecules22040610] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 04/05/2017] [Accepted: 04/06/2017] [Indexed: 12/19/2022] Open
Abstract
Lutein (L) and zeaxanthin (Z) are dietary carotenoids derived from dark green leafy vegetables, orange and yellow fruits that form the macular pigment of the human eyes. It was hypothesized that they protect against visual disorders and cognition diseases, such as age-related macular degeneration (AMD), age-related cataract (ARC), cognition diseases, ischemic/hypoxia induced retinopathy, light damage of the retina, retinitis pigmentosa, retinal detachment, uveitis and diabetic retinopathy. The mechanism by which they are involved in the prevention of eye diseases may be due their physical blue light filtration properties and local antioxidant activity. In addition to their protective roles against light-induced oxidative damage, there are increasing evidences that L and Z may also improve normal ocular function by enhancing contrast sensitivity and by reducing glare disability. Surveys about L and Z supplementation have indicated that moderate intakes of L and Z are associated with decreased AMD risk and less visual impairment. Furthermore, this review discusses the appropriate consumption quantities, the consumption safety of L, side effects and future research directions.
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Affiliation(s)
- Yu-Ping Jia
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
| | - Lei Sun
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
| | - He-Shui Yu
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
| | - Li-Peng Liang
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
| | - Wei Li
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
| | - Hui Ding
- Tianjin Zhongyi Pharmaceutical Co., Ltd., Tianjin 300193, China.
| | - Xin-Bo Song
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
- Tianjin Zhongyi Pharmaceutical Co., Ltd., Tianjin 300193, China.
| | - Li-Juan Zhang
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
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120
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Saify K, Saadat M. Influence of a 50bp Ins/Del polymorphism at promoter of the superoxide dismutase-1 on gene expression and risk of heroin dependency. Environ Health Prev Med 2017; 22:4. [PMID: 29165112 PMCID: PMC5661911 DOI: 10.1186/s12199-017-0617-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 03/04/2017] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE Superoxide dismutase-1 (SOD1, OMIM: 147450) is one of the major antioxidant enzymes, which plays a vital role in clearance of reactive oxygen species. A genetic polymorphism of 50 bp insertion/deletion (Ins/Del) in the promoter region of the SOD1 was reported. The aims of the present study are to evaluate the influence of this polymorphism on the SOD1 mRNA levels in human peripheral blood cells and its association with risk of heroin dependency. METHODS The present study consisted of 47 healthy students of Shiraz University (south-west Iran) for investigating the association between the Ins/Del polymorphism on expression level of SOD1, also a total of 442 heroin dependent and 799 healthy controls were included in a case-control study investigating the association between the study polymorphism and risk of dependency to heroin. The quantitative SOD1 mRNA expression levels were investigated using quantitative real-time PCR. RESULTS Statistical analysis revealed a significant difference between the study genotypes (t = 5.17; df = 45; P < 0.001). The Del allele of the study polymorphism decreased approximately 33% of the SOD1 mRNA levels of the gene in the heterozygote individuals. Statistical analysis indicating that in both genders, neither the Ins/Del nor the Del/Del genotypes was associated with the risk of heroin addiction. CONCLUSIONS The present study indicating that although the Ins/Del polymorphism of SOD1 is associated with the SOD1 expression levels, this polymorphism is not associated with the risk of dependency to heroin.
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Affiliation(s)
- Khyber Saify
- Department of Biology, College of Sciences, Shiraz University, Shiraz, 71467-13565, Iran
| | - Mostafa Saadat
- Department of Biology, College of Sciences, Shiraz University, Shiraz, 71467-13565, Iran.
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121
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Su D, Hu S, Guan L, Wu X, Shi C, Yang X, Ma X. Down-regulation of GJA3 is associated with lens epithelial cell apoptosis and age-related cataract. Biochem Biophys Res Commun 2017; 484:159-164. [PMID: 28088522 DOI: 10.1016/j.bbrc.2017.01.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 01/11/2017] [Indexed: 10/20/2022]
Abstract
Lens epithelial cell apoptosis is regarded as the common molecular basis of the initiation and subsequent progression of cataract. Recent studies have shown that Oxidative radicals derived from H2O2 causes lens epithelial cell apoptosis, While much work still needs to be done to elucidate this important mechanism of lens epithelial cell apoptosis induced by H2O2. The present study investigated the effect of human lens epithelial cell (SRA01/04) apoptosis induced by H2O2 and the possible molecular mechanism involved. Our data in this report has validated that H2O2 is an effective inducer of lens epithelial cells apoptosis, with the concentrations of H2O2 (100 μM). Moreover, we revealed that the down regulation of the GJA3 gene was associated with H2O2-induced lens epithelial cells apoptosis. Over-expression of GJA3 gene restrained the lens epithelial cells apoptosis induced by H2O2. Furthermore, GJA3 V44 M mutation partly inhibited the capacity of GJA3 to suppress apoptosis induced by H2O2 in SRA01/04 cells, eliciting the critical role of GJA3 in H2O2-induced lens epithelial cells apoptosis. The in vivo results indicated that down-regulation of GJA3 in lens epithelial cells was associated with age-related cataract genesis. Data from this study established the association of GJA3 down regulation with lens epithelial cells apoptosis and age-related cataract genesis.
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Affiliation(s)
- Dongmei Su
- Department of Genetics, National Research Institute for Family Planning, Beijing, China
| | - Shanshan Hu
- Department of Ophthalmology, Hongqi Hospital of Mudanjiang Medical College, Mudanjiang, Heilongjiang, China
| | - Lina Guan
- Department of Genetics, National Research Institute for Family Planning, Beijing, China
| | - Xinzhu Wu
- Department of Genetics, National Research Institute for Family Planning, Beijing, China
| | - Cuige Shi
- Department of Genetics, National Research Institute for Family Planning, Beijing, China.
| | - Xiaobo Yang
- Department of Ophthalmology, Hongqi Hospital of Mudanjiang Medical College, Mudanjiang, Heilongjiang, China.
| | - Xu Ma
- Department of Genetics, National Research Institute for Family Planning, Beijing, China.
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Expression of DNA repair genes in lens cortex of age-related cortical cataract. Exp Mol Pathol 2017; 102:219-223. [PMID: 28202419 DOI: 10.1016/j.yexmp.2017.02.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 02/05/2017] [Accepted: 02/10/2017] [Indexed: 12/21/2022]
Abstract
The formation and development of age-related cataract (ARC) has been demonstrated to have the involvement of defective DNA repair in lens epithelial cells (LECs). This study aimed to investigate DNA repair genes expression in human lens cortex collected from age-related cortical cataract (ARCC) and controls during surgery. The expression levels of the genes were evaluated by xx genes microarray analysis. The results were further confirmed by Quantitative Real-Time PCR (qRT-PCR). The mRNA levels of 7 genes decreased and 4 genes out of 92 genes increased in lens cortex of ARCCs compared with controls with the fold change >1.5. Using Comet assay, we found the DNA breaks in the LECs of ARCCs were obviously severer than that of controls. The present data provide a global perspective on expression of DNA repair genes that may contribute to cataract pathogenesis. The DNA damage and repair pathway might be an effective target to delay the onset of ARC.
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Selvaraj K, Gowthamarajan K, Karri VVSR, Barauah UK, Ravisankar V, Jojo GM. Current treatment strategies and nanocarrier based approaches for the treatment and management of diabetic retinopathy. J Drug Target 2017; 25:386-405. [DOI: 10.1080/1061186x.2017.1280809] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Kousalya Selvaraj
- Department of Pharmaceutics, JSS College of Pharmacy, Ootacamund, JSS University, Mysuru, India
| | - Kuppusamy Gowthamarajan
- Department of Pharmaceutics, JSS College of Pharmacy, Ootacamund, JSS University, Mysuru, India
| | | | - Uday K. Barauah
- Department of Pharmaceutics, JSS College of Pharmacy, Ootacamund, JSS University, Mysuru, India
| | - Vanka Ravisankar
- Department of Pharmaceutics, JSS College of Pharmacy, Ootacamund, JSS University, Mysuru, India
| | - Gifty M. Jojo
- Department of Pharmaceutics, JSS College of Pharmacy, Ootacamund, JSS University, Mysuru, India
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Yan H, Wang D, Ding TB, Zhou HY, Yan WJ, Wang XC. Comparison of lens oxidative damage induced by vitrectomy and/or hyperoxia in rabbits. Int J Ophthalmol 2017; 10:6-14. [PMID: 28149770 DOI: 10.18240/ijo.2017.01.02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 10/13/2016] [Indexed: 11/23/2022] Open
Abstract
AIM To compare of lens oxidative damage induced by vitrectomy and/or hyperoxia in rabbit. METHODS Sixteen New Zealand rabbits (2.4-2.5 kg) were randomly divided into two groups (Group A, n=12; Group B, n=4). In Group A, the right eyes were treated with vitrectomy and systemic hyperoxia (oxygen concentration: 80%-85%, 1 ATA, 4h/d) (Group A-right), and the left eyes were treated with hyperoxia without vitrectomy surgery (Group A-left). Four rabbits in group B (eight eyes) were untreated as the controls. Lens transparency was monitored with a slit lamp and recorded before and after vitrectomy. After hyperoxic treatment for 6mo, the eyeballs were removed and the lens cortices (containing the capsules) and nuclei were separated for further morphological and biochemical evaluation. RESULTS Six months after treatments, there were no significant morphological changes in the lenses in any experimental group when observed with a slit lamp. However, the levels of water-soluble proteins and ascorbate, and the activities of catalase and Na+-K+-ATPase were significantly reduced, whereas the levels of malondialdehyde and transforming growth factor β2 (TGF-β2) were significantly elevated, in both the cortices and nuclei of eyes treated with vitrectomy and hyperoxia. The increase in protein-glutathione mixed disulfides and the reduction in water-soluble proteins were more obvious in the lens nuclei. The levels of ascorbate in the vitreous fluid were also reduced after vitrectomy, whereas TGF-β2 increased after vitrectomy and hyperoxia. Systemic hyperoxia exposure increased these effects. CONCLUSION Removal of the intact vitreous gel with vitrectomy and exposing the lens to increased oxygen from the retina induce lens oxidation and aggregation. Thus, an intact vitreous gel structure may protect the lens from oxidative insult and maintain lens transparency.
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Affiliation(s)
- Hong Yan
- Department of Ophthalmology, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, Shaanxi Province, China; Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, the First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Dan Wang
- Department of Ophthalmology, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, Shaanxi Province, China
| | - Tian-Bing Ding
- Department of Microbiology, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China
| | - Hai-Yan Zhou
- Department of Ophthalmology, Shaanxi Provincial People's Hospital, Xi'an 710068, Shaanxi Province, China
| | - Wei-Jia Yan
- Department of Clinical Medicine, Xi'an Medical University, Xi'an 710021, Shaanxi Province, China
| | - Xin-Chuan Wang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, Shaanxi Province, China
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Mukherjee A, Bone RA. Lens density measurements by two independent psychophysical techniques. EYE AND VISION 2016; 3:24. [PMID: 27622189 PMCID: PMC5018944 DOI: 10.1186/s40662-016-0054-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 08/19/2016] [Indexed: 11/21/2022]
Abstract
Background Cataract, a leading cause of vision impairment, is due to the lens becoming excessively optically dense. Change in the lens optical density (LOD) could be a useful indicator of incipient nuclear cataract and would necessitate the development of accurate measurement techniques. Mapcat sf™ is a heterochromatic flicker photometer for measuring macular pigment optical density (MPOD) under photopic conditions. In the process, it also measures LOD that is needed in the calculation of MPOD. LOD is then converted by the instrument to “lens equivalent age” (LEA). However, varying cone photoreceptor ratios among individuals could affect the LEA measurement. Scotopic vision is mediated by rod photoreceptors; therefore, LEA measurement under scotopic conditions potentially provides a reliable standard for assessing other methods. The study was conducted to test the level of agreement between the LEA data obtained under photopic and scotopic conditions for a sample population. We also comment on factors that might contribute to any disagreement. Methods LEAs were obtained by Mapcat sf for 25 subjects and compared with those obtained under absolute scotopic threshold conditions. Results The mean scotopic LEA for the subjects was 2.7 years higher than the mean photopic LEA, but this difference was not statistically significant. Measurements by the two methods were reasonably correlated (r2 = 0.59, p < 0.0001). Significant individual differences in LEA by the two methods were found for six of the 25 subjects. Although our calculations included a standard long- to medium-wavelength-sensitive cone ratio, we found that different ratios could be found that rendered the differences in LEA insignificant for two of these six subjects. Variability in pupil diameter during scotopic measurements was considered another potential source of discrepancy between LEAs by the two methods. Conclusion The absolute threshold technique, with long adaptation times, is probably impractical for routine lens density measurement, whereas Mapcat sf provided a rapid, straightforward test that may find its application in optometric/ophthalmic practice.
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Yoo TK, Kim SW, Seo KY. Age-Related Cataract Is Associated with Elevated Serum Immunoglobulin E Levels in the South Korean Population: A Cross-Sectional Study. PLoS One 2016; 11:e0166331. [PMID: 27861567 PMCID: PMC5115736 DOI: 10.1371/journal.pone.0166331] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Accepted: 10/26/2016] [Indexed: 01/06/2023] Open
Abstract
Background Previous research has suggested that immunoglobulin E (IgE)-mediated events lead to several chronic diseases. We investigated the association between allergic conditions and age-related cataracts in the South Korean adult population. Methods A cross-sectional study was performed using data obtained from 1,170 participants aged 40 years or older who were enrolled in the Korean National Health and Nutrition Examination Survey 2010. Multivariable logistic regression was used to examine the relationship between age-related cataracts and allergic conditions, including total serum IgE and allergen-specific serum IgE levels, after adjustment for potential confounders (age, sex, alcohol consumption, smoking, sun exposure, blood pressure, plasma glucose and cholesterol levels, as well as histories of asthma, atopic dermatitis, and rheumatoid arthritis). Results After adjusting for potential confounders, the odds ratio (OR) for age-related cataract was greater in participants with higher total serum IgE levels (OR = 1.37; P = 0.044). In particular, increased IgE levels were significantly associated with nuclear cataract (OR = 1.42; P = 0.032). However, allergen-specific serum IgE levels did not differ significantly between groups. In the trend analysis, no significant relationship was observed between serum IgE and any type of age-related cataract. Conclusion Increased total serum IgE level is independently associated with age-related cataracts after adjustment for confounding factors.
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Affiliation(s)
- Tae Keun Yoo
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, South Korea
| | - Sun Woong Kim
- Department of Ophthalmology, Yonsei University Wonju College of Medicine, Wonju, South Korea
- * E-mail: (SWK); (KYS)
| | - Kyoung Yul Seo
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, South Korea
- * E-mail: (SWK); (KYS)
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Li QL, Zhang HY, Qin YJ, Meng QL, Yao XL, Guo HK. MicroRNA-34a promoting apoptosis of human lens epithelial cells through down-regulation of B-cell lymphoma-2 and silent information regulator. Int J Ophthalmol 2016; 9:1555-1560. [PMID: 27990356 DOI: 10.18240/ijo.2016.11.04] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Accepted: 04/08/2016] [Indexed: 02/07/2023] Open
Abstract
AIM To investigate the role of microRNA-34a (miR-34a) in the induction of apoptosis of human lens epithelial (HLE-B3) cells. METHODS The apoptosis of HLE-B3 cells was detected by Annexin V-PE apoptosis detection kit after the treatment with 200 µmol/L H2O2 for 24h and lentiviral miR-34a vector transfection. The expression of miR-34a in the cells was quantified by quantitative real time polymerase chain reaction (qRT-PCR) in response to H2O2 exposure and the vector transfection. The effects of overexpression of miR-34a on the expression of B-cell lymphoma-2 (Bcl-2) and silent information regulator 1 (SIRT1) was determined by qRT-PCR and Western blot. RESULTS The expression of miR-34a was up-regulated by the treatment of H2O2 in HLE-B3 cells. The increased expression of miR-34a is accompanied with the cell apoptosis. Consistence with the H2O2 exposure, ectopic overexpression of miR-34a in HLE-B3 cells promoted cells apoptosis. Importantly the anti-apoptosis factors Bcl-2 and SIRT1 were reduced significantly by up-regulation of miR-34a in HLE-B3 cells. CONCLUSION MiR-34a promotes the apoptosis of HLE-B3 cells by down-regulating Bcl-2 and SIRT1, suggesting that miR-34a may involve in the pathogenesis of cataract formation and targeting miR-34a may be a potentially therapeutic approach for treatment of cataract.
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Affiliation(s)
- Qing-Lan Li
- Department of Ophthalmology, Ruikang Hospital affiliated to Guangxi University of Chinese Medicine, Nanning 530000, Guangxi Zhuang Autonomous Region, China; Department of Ophthalmology, Guangdong General Hospital and Guangdong Academy of Medical Sciences, Guangzhou 510000, Guangdong Province, China
| | - Hong-Yang Zhang
- Department of Ophthalmology, Guangdong General Hospital and Guangdong Academy of Medical Sciences, Guangzhou 510000, Guangdong Province, China
| | - Yong-Jie Qin
- Department of Ophthalmology, Guangdong General Hospital and Guangdong Academy of Medical Sciences, Guangzhou 510000, Guangdong Province, China
| | - Qian-Li Meng
- Department of Ophthalmology, Guangdong General Hospital and Guangdong Academy of Medical Sciences, Guangzhou 510000, Guangdong Province, China
| | - Xiao-Lei Yao
- Department of Ophthalmology, Ruikang Hospital affiliated to Guangxi University of Chinese Medicine, Nanning 530000, Guangxi Zhuang Autonomous Region, China
| | - Hai-Ke Guo
- Department of Ophthalmology, Guangdong General Hospital and Guangdong Academy of Medical Sciences, Guangzhou 510000, Guangdong Province, China; Zhengzhou Aier Eye Hospital, Aier School of Ophthalmology, Central South University, Zhengzhou 450000, Henan Province, China
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Caixinha M, Amaro J, Santos M, Perdigao F, Gomes M, Santos J. In-Vivo Automatic Nuclear Cataract Detection and Classification in an Animal Model by Ultrasounds. IEEE Trans Biomed Eng 2016; 63:2326-2335. [DOI: 10.1109/tbme.2016.2527787] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Wang W, Schaumberg DA, Park SK. Cadmium and lead exposure and risk of cataract surgery in U.S. adults. Int J Hyg Environ Health 2016; 219:850-856. [PMID: 27460785 PMCID: PMC5086441 DOI: 10.1016/j.ijheh.2016.07.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 07/14/2016] [Indexed: 12/22/2022]
Abstract
Cataract is a major cause of visual dysfunction and the leading cause of blindness. Elevated levels of cadmium and lead have been found in the lenses of cataract patients, suggesting these metals may play a role in cataract risk. This study aimed to examine the associations of blood lead, blood cadmium and urinary cadmium with cataract risk. We identified 9763 individuals aged 50 years and older with blood lead and cadmium levels, and a randomly selected subgroup of 3175 individuals with available urinary cadmium levels, from the National Health and Nutrition Examination Surveys (NHANES) from 1999 to 2008 (mean age=63years). Participants were considered to have cataract if they self-reported prior cataract surgery in NHANES's vision examination. Odds ratios (ORs) and 95% confidence intervals (CIs) were computed using survey logistic regression models. We identified 1737 cataract surgery cases (the weighted prevalence=14.1%). With adjustment for age, race/ethnicity, gender, education, diabetes mellitus, body mass index, cigarette smoking (serum cotinine and pack-years) and urine hydration, every 2-fold increase in urinary cadmium was associated with a 23% higher risk of cataract surgery (OR=1.23, 95% CI: 1.04, 1.46, p=0.021). We found no associations of cataract surgery with blood cadmium (OR=0.97, 95% CI: 0.89, 1.07) and blood lead (OR=0.97, 95% CI: 0.88, 1.06). Mediation analysis showed that for the smoking-cadmium-cataract pathway, the ratio of smoking's indirect effect to the total effect through cadmium was more than 50%. These results suggest that cumulative cadmium exposure may be an important under-recognized risk factor for cataract. However, these findings should be interpreted with a caution because of inconsistent results between urinary cadmium and blood cadmium.
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Affiliation(s)
- Weiye Wang
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI 48109-2029, USA.
| | - Debra A Schaumberg
- Department of Ophthalmology & Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, UT 84132, USA; Global Medical Affairs, Shire, Lexington, MA 02421, USA.
| | - Sung Kyun Park
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI 48109-2029, USA; Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI 48109-2029, USA.
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Kumagai K, Hangai M, Furukawa M, Suetsugu T, Ogino N. Effect of vitreomacular adhesion and vitreous gel on age-related reduction of macular thickness: a retrospective observational study. BMJ Open 2016; 6:e012972. [PMID: 27694490 PMCID: PMC5051463 DOI: 10.1136/bmjopen-2016-012972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
OBJECTIVE To investigate the effects of vitreomacular adhesion (VMA), vitreomacular separation (VMS) and absence of vitreous gel due to vitrectomy on macular thickness measured in the spectral domain optical coherence tomographic (SD-OCT) images. DESIGN A longitudinal, retrospective, observational study. SETTING Secondary multicentre study. PARTICIPANTS 218 eyes of 218 healthy patients and 119 vitrectomised eyes of 119 patients were studied. The healthy individuals were classified into a VMA group (54 eyes) and a VMS group (164 eyes), while the vitrectomised patients were classified into an internal limiting membrane (ILM)-on group (26 eyes) and an ILM-off group (93 eyes). In all participants, 2 Cirrus HD-OCT recordings were made with an average interval of 36 months (range 24-60 months). PRIMARY AND SECONDARY OUTCOME MEASURES The primary outcome measure was the rate of change in macular thickness in the central sector. The secondary outcomes were the rates of change in macular thickness in the inner 4 sectors. RESULTS The annual rate of change in the macular thickness of the central sector was 0.76±1.8 µm/year in the VMA group, -0.58±2.3 µm/year in the VMS group, -1.57±1.9 µm/year in the ILM-on group and -0.86±3.1 µm/year in the ILM-off group. There was a significant difference between the rate of the central sector thickness change in the VMA and VMS groups (p=0.0001). The presence of VMA was a significant factor associated with an increase in the central sector thickness (p=0.0055). When the healthy and ILM-on groups were compared, the rate of decrease in the central sector thickness was faster in the ILM-on group (p=0.0043). Multiple regression analyses showed that not peeling the ILM during the vitrectomy was a significant factor associated with a decrease in the central sector thickness (p=0.044). CONCLUSIONS The presence of a VMA and a vitreous gel may help restrain the macular thickness reduction.
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Affiliation(s)
| | - Masanori Hangai
- Department of Ophthalmology, Faculty of Medicine, Saitama Medical University, Iruma, Japan
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Qin L, Tao Y, Wang L, Chen H, Liu Y, Huang YF. Hydrogen-Rich Saline as an Innovative Therapy for Cataract: A Hypothesis. Med Sci Monit 2016; 22:3191-5. [PMID: 27606690 PMCID: PMC5019135 DOI: 10.12659/msm.899807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Cataract is the leading cause of irreversible blindness worldwide. Increasing evidence indicates that oxidative stress is an important risk factor contributing to the development of cataract. Moreover, the enhancement of the antioxidant defense system may be beneficial to prevent or delay the cataractogenesis. The term oxidative stress has been defined as a disturbance in the equilibrium status of oxidant/antioxidant systems with progressive accumulation of reactive oxygen species (ROS) in intact cells. Superfluous ROS can damage proteins, lipids, polysaccharides, and nucleic acids within ocular tissues that are closely correlated with cataract formation. Therefore, prevention of oxidative stress damage by antioxidants might be considered as a viable means of medically offsetting the progression of this vision-impairing disease. Molecular hydrogen has recently been verified to have protective and therapeutic value as an antioxidant through its ability to selectively reduce cytotoxic ROS such as hydroxyl radical (OH). Hitherto, hydrogen has been used as a therapeutic element against multiple pathologies in both animal models and human patients. Unlike most well-known antioxidants, which are unable to successfully target organelles, hydrogen has advantageous distribution characteristics enabling it to penetrate biomembranes and diffuse into the cytosol, mitochondria, and nucleus. Consequently, we speculate that hydrogen might be an effective antioxidant to protect against lens damage, and it is important to further explore the biological mechanism underlying its potential therapeutic effects.
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Affiliation(s)
- Limin Qin
- Department of Ophthalmology, General Hospital of Chinese PLA, Ophthalmology and Visual Science Key Lab of PLA, Beijing, China (mainland)
| | - Ye Tao
- Department of Ophthalmology, General Hospital of Chinese PLA, Ophthalmology and Visual Science Key Lab of PLA, Beijing, China (mainland)
| | - Liqiang Wang
- Department of Ophthalmology, General Hospital of Chinese PLA, Ophthalmology and Visual Science Key Lab of PLA, Beijing, China (mainland)
| | - Hong Chen
- Department of Ophthalmology, General Hospital of Chinese PLA, Ophthalmology and Visual Science Key Lab of PLA, Beijing, China (mainland)
| | - Ying Liu
- Department of Ophthalmology, General Hospital of Chinese PLA, Ophthalmology and Visual Science Key Lab of PLA, Beijing, China (mainland)
| | - Yi Fei Huang
- Department of Ophthalmology, General Hospital of Chinese PLA, Ophthalmology and Visual Science Key Lab of PLA, Beijing, China (mainland)
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The Multiple Facets of Lutein: A Call for Further Investigation in the Perinatal Period. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:5381540. [PMID: 27668037 PMCID: PMC5030441 DOI: 10.1155/2016/5381540] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 08/11/2016] [Indexed: 02/01/2023]
Abstract
Lutein may have important antioxidant actions in free-radical-mediated diseases, in addition to its well-known antioxidant and cytoprotective effects on macula and photoreceptors. The peculiar perinatal susceptibility to oxidative stress indicates that prophylactic use of antioxidants as lutein could help to prevent or at least to reduce oxidative stress related diseases in newborns. Since lutein is not synthesized by humans, the intake primarily depends on diet or supplementation. Newborns receive lutein exclusively from breast milk. Lutein supplementation in term newborns has been reported to reduce oxidative stress and increase antioxidant capacities in the first days of life. Innovative frontiers concerning lutein supplementation are orientated toward cardiometabolic health improvement and cognitive benefits. The safety of lutein as an antioxidant agent has been confirmed in experimental and clinical studies, but its routine use is not recommended in perinatal period. This review summarizes what is known about the role of lutein as an antioxidant and anti-inflammatory agent in animal model and humans.
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134
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Saify K, Saadat I, Saadat M. Influence of A-21T and C-262T genetic polymorphisms at the promoter region of the catalase (CAT) on gene expression. Environ Health Prev Med 2016; 21:382-386. [PMID: 27225276 PMCID: PMC5305992 DOI: 10.1007/s12199-016-0540-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Accepted: 05/14/2016] [Indexed: 01/20/2023] Open
Abstract
OBJECTIVE Catalase (CAT, OMIM: 115500) is one of the major antioxidant enzymes, which plays an important role in the clearance of reactive oxygen species. Three genetic polymorphisms of A-21T (rs7943316), C-262T (rs1001179), and C-844T (rs769214) in the promoter region of the CAT have been reported. It has been suggested that these polymorphisms may alter the recognition sites of transcriptional factors, therefore it might be concluded that these polymorphisms may alter the expression levels of the gene. The aim of the present study is to evaluate the associations between these genetic variations and the CAT mRNA levels in human peripheral blood cells. METHODS The present study consisted of 47 healthy students of Shiraz University (south-west Iran). Genotypes of the CAT polymorphisms were determined by PCR based method. The quantitative CAT mRNA expression levels were investigated using quantitative real-time PCR. RESULTS Analysis of variance revealed significant differences between the study genotypes (For A-21T polymorphism: F = 7.45; df = 2, 44; P = 0.002; For C-262T polymorphism: F = 15.17; df = 2, 44; P < 0.001). The studied polymorphisms showed linkage disequilibrium (D' = 1.0, r 2 = 0.1813, χ 2 = 17.03, P < 0.0001). The mRNA levels of CAT in the AC/TT, TC/TC, TC/TT, and TC/TC diplotypes significantly were higher than the mRNA levels in AC/AC diplotype. There was a significant difference between the study genotypes (F = 9.24; df = 5, 41; P < 0.001). The TC/TC and TT/TT diplotypes showed about 2 and 4 folds CAT mRNA levels compared with the AC/AC diplotype. CONCLUSIONS The present findings indicated that these polymorphisms were significantly associated with the gene expression.
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Affiliation(s)
- Khyber Saify
- Department of Biology, College of Sciences, Shiraz University, Shiraz, 71467-13565 Iran
| | - Iraj Saadat
- Department of Biology, College of Sciences, Shiraz University, Shiraz, 71467-13565 Iran
| | - Mostafa Saadat
- Department of Biology, College of Sciences, Shiraz University, Shiraz, 71467-13565 Iran
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Fan X, Monnier VM, Whitson J. Lens glutathione homeostasis: Discrepancies and gaps in knowledge standing in the way of novel therapeutic approaches. Exp Eye Res 2016; 156:103-111. [PMID: 27373973 DOI: 10.1016/j.exer.2016.06.018] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 03/10/2016] [Accepted: 06/25/2016] [Indexed: 01/18/2023]
Abstract
Cataract is the major cause of blindness worldwide. The WHO has estimated around 20 million people have bilateral blindness from cataract, and that number is expected to reach 50 million in 2050. The cataract surgery is currently the main treatment approach, though often associated with complications, such as Posterior Capsule Opacification (PCO)-also known as secondary cataract. The lens is an avascular ocular structure equipped with an unusually high level of glutathione (GSH), which plays a vital role in maintaining lens transparency by regulating lenticular redox state. The lens epithelium and outer cortex are thought to be responsible for providing the majority of lens GSH via GSH de novo synthesis, assisted by a continuous supply of constituent amino acids from the aqueous humor, as well as extracellular GSH recycling from the gamma-glutamyl cycle. However, when de novo synthesis is impaired, in the presence of low GSH levels, as in the aging human lens, compensatory mechanisms exist, suggesting that the lens is able to uptake GSH from the surrounding ocular tissues. However, these uptake mechanisms, and the GSH source and its origin, are largely unknown. The lens nucleus does not have the ability to synthesize its own GSH and fully relies on transport from the outer cortex by yet unknown mechanisms. Understanding how aging reduces GSH levels, particularly in the lens nucleus, how it is associated with age-related nuclear cataract (ARNC), and how the lens compensates for GSH loss via external uptake should be a major research priority. The intent of this review, which is dedicated to the memory of David C. Beebe, is to summarize our current understanding of lens GSH homeostasis and highlight discrepancies and gaps in knowledge that stand in the way of pharmacologically minimizing the impact of declining GSH content in the prevention of age-related cataract.
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Affiliation(s)
- Xingjun Fan
- Department of Pathology, Case Western Reserve University, USA.
| | - Vincent M Monnier
- Department of Pathology, Case Western Reserve University, USA; Department of Biochemistry, Case Western Reserve University, USA
| | - Jeremy Whitson
- Department of Pathology, Case Western Reserve University, USA
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Fu Q, Qin Z, Yu J, Yu Y, Tang Q, Lyu D, Zhang L, Chen Z, Yao K. Effects of senescent lens epithelial cells on the severity of age-related cortical cataract in humans: A case-control study. Medicine (Baltimore) 2016; 95:e3869. [PMID: 27336873 PMCID: PMC4998311 DOI: 10.1097/md.0000000000003869] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
The aging of lens progenitor cell has been repeatedly proposed to play a key role in age-related cataracts (ARCs), but the mechanism is far from being understood. The present study aims to investigate the relationship between aging of lens progenitor/epithelial cells and the 4 subtypes of ARCs in humans.Lens capsules, which were collected from ARC patients during surgery, were divided into 3 groups according to the age of patients (50-60, 60-80, and >80 years). The expressions of lens progenitor cell-related markers Sox2, Abcg2, and Ki67 were first examined in human lens epithelial cells (HLECs) in situ. Then, the percentage of senescent and SA-β-gal HLECs isolated from lens capsules were quantified. Finally, the potential relationships between the percentage of senescent (and SA-β-gal) HLECs and the severity of ARCs were analyzed.Ki67, Sox2, and Abcg2 HLECs in lens capsules were clearly more abundant in young people than in patients older than 50 years, and they were almost absent in patients older than 60 years. The percentage of primary HLECs with aging morphology increased with age, consistent with the results of SA-β-gal primary HLECs. Only cortical cataract classification was found to be strongly related to the percentage of SA-β-gal and senescent HLECs.Our study gave the initial evidence on the dynamical change of lens stem/progenitor cells in human lens capsule with age and suggested that lens progenitor/epithelial cell aging is important in the severity of cortical cataracts.
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Affiliation(s)
- Qiuli Fu
- Eye Center of the 2nd Affiliated Hospital, Medical College of Zhejiang University
- Zhejiang Provincial Key Lab of Ophthalmology
| | - Zhenwei Qin
- Eye Center of the 2nd Affiliated Hospital, Medical College of Zhejiang University
- Zhejiang Provincial Key Lab of Ophthalmology
| | - Jiexin Yu
- Eye Center of the 2nd Affiliated Hospital, Medical College of Zhejiang University
- Zhejiang Provincial Key Lab of Ophthalmology
- The First Affiliated Hospital of Zhejiang Chinese Medical University, Zhejiang Provincial Hospital of TCM
| | - Yinhui Yu
- Eye Center of the 2nd Affiliated Hospital, Medical College of Zhejiang University
- Zhejiang Provincial Key Lab of Ophthalmology
| | - Qiaomei Tang
- Eye Center of the 2nd Affiliated Hospital, Medical College of Zhejiang University
- Zhejiang Provincial Key Lab of Ophthalmology
| | - Danni Lyu
- Eye Center of the 2nd Affiliated Hospital, Medical College of Zhejiang University
- Zhejiang Provincial Key Lab of Ophthalmology
| | - Lifang Zhang
- Eye Center of the 2nd Affiliated Hospital, Medical College of Zhejiang University
- Zhejiang Provincial Key Lab of Ophthalmology
| | - Zhijian Chen
- Department of Environmental and Occupational Health, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang Province, China
| | - Ke Yao
- Eye Center of the 2nd Affiliated Hospital, Medical College of Zhejiang University
- Zhejiang Provincial Key Lab of Ophthalmology
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Tao Y, Geng L, Xu WW, Qin LM, Peng GH, Huang YF. The potential utilizations of hydrogen as a promising therapeutic strategy against ocular diseases. Ther Clin Risk Manag 2016; 12:799-806. [PMID: 27279745 PMCID: PMC4878665 DOI: 10.2147/tcrm.s102518] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Hydrogen, one of the most well-known natural molecules, has been used in numerous medical applications owing to its ability to selectively neutralize cytotoxic reactive oxygen species and ameliorate hazardous inflammations. Hydrogen can exert protective effects on various reactive oxygen species-related diseases, including the transplantation-induced intestinal graft injury, chronic inflammation, ischemia–reperfusion injuries, and so on. Especially in the eye, hydrogen has been used to counteract multiple ocular pathologies in the ophthalmological models. Herein, the ophthalmological utilizations of hydrogen are systematically reviewed and the underlying mechanisms of hydrogen-induced beneficial effects are discussed. It is our hope that the protective effects of hydrogen, as evidenced by these pioneering studies, would enrich our pharmacological knowledge about this natural element and cast light into the discovery of a novel therapeutic strategy against ocular diseases.
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Affiliation(s)
- Ye Tao
- Department of Ophthalmology, Chinese People's Liberation Army General Hospital, Ophthalmology & Visual Science Key Lab of PLA, Beijing, People's Republic of China
| | - Lei Geng
- Department of Orthopaedics, Chinese People's Liberation Army General Hospital, Ophthalmology & Visual Science Key Lab of PLA, Beijing, People's Republic of China
| | - Wei-Wei Xu
- Department of Ophthalmology, Chinese People's Liberation Army General Hospital, Ophthalmology & Visual Science Key Lab of PLA, Beijing, People's Republic of China
| | - Li-Min Qin
- Department of Ophthalmology, Chinese People's Liberation Army General Hospital, Ophthalmology & Visual Science Key Lab of PLA, Beijing, People's Republic of China
| | - Guang-Hua Peng
- Department of Ophthalmology, Chinese People's Liberation Army General Hospital, Ophthalmology & Visual Science Key Lab of PLA, Beijing, People's Republic of China
| | - Yi-Fei Huang
- Department of Ophthalmology, Chinese People's Liberation Army General Hospital, Ophthalmology & Visual Science Key Lab of PLA, Beijing, People's Republic of China
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138
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El Okda EA, Mohamed MM, Shaheed EB, Abdel-Moemin AR. Switching to instant black coffee modulates sodium selenite-induced cataract in rats. GERMAN MEDICAL SCIENCE : GMS E-JOURNAL 2016; 14:Doc05. [PMID: 27158251 PMCID: PMC4844918 DOI: 10.3205/000232] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Revised: 03/07/2016] [Indexed: 12/04/2022]
Abstract
The influence of daily consumption of some common beverages on the development of cataract in rats was investigated. Total phenol content was determined in the beverages and an oral standardized dose of total phenols from each beverage was given to the treated rats. Weaned male albino rats were used and divided into five groups (n=7). Rats were fed Ain 93G and administered the standardized dose of instant coffee, black tea and hibiscus beverages for 30 days. On day 14 all rats were injected with a single dose of sodium selenite (Na2SeO3) 15 µmol/kg bodyweight, except the control groups NC (negative control, did not receive Na2SeO3) and PC (positive control, was already injected on day 1 of the study). The rats were continued on Ain 93G and the standardized dose for another 16 days. Positive control rats were used. Total phenols were 210, 40, and 44 mg/g dry weight gallic acid equivalent in black coffee, black tea, and hibiscus, respectively. Decreased levels (statistically significant P<0.05) of malondialdehyde, total nitric oxide, Ca-ATPase, tumor necrosis factor-α, interleukin-1β, superoxide dismutase, and conversely, increased levels (statistically significant P<0.05) of total protein, reduced glutathione, catalase were found in the lenses of the coffee group compared to PC. There are co-phenol substances in the instant black coffee that promoted coffee to be the most effective beverage.
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Affiliation(s)
- E A El Okda
- Department of Home Economics, Women's College, Ain Shams University, Cairo, Egypt
| | - M M Mohamed
- Department of Home Economics, Women's College, Ain Shams University, Cairo, Egypt
| | - E B Shaheed
- Pathology Department, Faculty of Veterinary Medicine, Cairo University, Cairo, Egypt
| | - A R Abdel-Moemin
- Department of Nutrition and Food Science, Faculty of Home Economics, Helwan University, Cairo, Egypt
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139
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Awodele O, Oreagba IA, Olayemi SO, Oladipo I, Iruegbukpe CO, Balogun BG, Balogun MM, Adedokun AO. Evaluation and Comparison of the Indices of Systemic Oxidative Stress among Black-Africans with Age-related Cataracts or Primary Glaucoma. Middle East Afr J Ophthalmol 2016; 22:489-94. [PMID: 26692723 PMCID: PMC4660538 DOI: 10.4103/0974-9233.167811] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
PURPOSE Oxidative stress has been implicated in the pathophysiology of glaucoma, cataract, and many degenerative diseases. The purpose of this study is to evaluate the systemic oxidative stress in black-African patients diagnosed with primary glaucoma or age-related cataract (ARC) and compare these indices to normal control patients and between the two conditions. METHODS This was a descriptive cross-sectional study of consecutive recruited subjects attending a tertiary care facility. One hundred adults were enrolled and sub-grouped into: Normal controls (n = 20), patients with primary glaucoma (n = 40), and patients with cataract (n = 40). The data were collected on patient demographics and clinical information. Ten milliliters of the venous blood was taken from each subject for the evaluation of serum biochemical indices of oxidative stress. Laboratory measurements of enzymatic and nonenzymic anti-oxidants, as well as lipid peroxidation, were conducted using established and validated spectrophotometric methods. The systemic oxidative stress was measured by the serum levels of anti-oxidant enzymes and lipid peroxidation, and compared between the groups and to a control group of patients. RESULTS Statistically, significantly reduced serum levels of glutathione, glutathione-S-transferase, superoxide dismutase, catalase, and ascorbic acid were found in the patients with glaucoma or cataract when compared with controls (P < 0.05 for all). Differences in serum lipid peroxidation levels across or between the groups were nonsignificant. Serum protein levels were significantly higher among the subjects with cataract or glaucoma than in controls. CONCLUSION Our results concur with findings in Caucasian study cohorts. This indicates that in black-Africans, primary glaucoma, and ARC are associated with increased systemic oxidative stress. This supports the existing evidence on the role of oxidative stress in these ocular disorders and reinforces the rationale for the use of anti-oxidants in the management and possible prevention of these conditions.
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Affiliation(s)
- O Awodele
- Department of Pharmacology, College of Medicine, University of Lagos, Ikeja, Lagos, Nigeria
| | - I A Oreagba
- Department of Pharmacology, College of Medicine, University of Lagos, Ikeja, Lagos, Nigeria
| | - S O Olayemi
- Department of Pharmacology, College of Medicine, University of Lagos, Ikeja, Lagos, Nigeria
| | - Idris Oladipo
- Department of Family Medicine, Lagos State University Teaching Hospital, Ikeja, Lagos, Nigeria
| | - C O Iruegbukpe
- Department of Pharmacology, College of Medicine, University of Lagos, Ikeja, Lagos, Nigeria
| | - B G Balogun
- Department of Ophthalmology, Lagos State Eye Institute, Lagos State University Teaching Hospital, Ikeja, Lagos, Nigeria
| | - M M Balogun
- Department of Ophthalmology, Lagos State Eye Institute, Lagos State University Teaching Hospital, Ikeja, Lagos, Nigeria
| | - A O Adedokun
- Department of Family Medicine, Lagos State University Teaching Hospital, Ikeja, Lagos, Nigeria
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140
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Yonova-Doing E, Forkin ZA, Hysi PG, Williams KM, Spector TD, Gilbert CE, Hammond CJ. Genetic and Dietary Factors Influencing the Progression of Nuclear Cataract. Ophthalmology 2016; 123:1237-44. [PMID: 27016950 PMCID: PMC4882156 DOI: 10.1016/j.ophtha.2016.01.036] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 01/13/2016] [Accepted: 01/24/2016] [Indexed: 11/10/2022] Open
Abstract
Purpose To determine the heritability of nuclear cataract progression and to explore prospectively the effect of dietary micronutrients on the progression of nuclear cataract. Design Prospective cohort study. Participants Cross-sectional nuclear cataract and dietary measurements were available for 2054 white female twins from the TwinsUK cohort. Follow-up cataract measurements were available for 324 of the twins (151 monozygotic and 173 dizygotic twins). Methods Nuclear cataract was measured using a quantitative measure of nuclear density obtained from digital Scheimpflug images. Dietary data were available from EPIC food frequency questionnaires. Heritability was modeled using maximum likelihood structural equation twin modeling. Association between nuclear cataract change and micronutrients was investigated using linear and multinomial regression analysis. The mean interval between baseline and follow-up examination was 9.4 years. Main Outcome Measures Nuclear cataract progression. Results The best-fitting model estimated that the heritability of nuclear cataract progression was 35% (95% confidence interval [CI], 13–54), and individual environmental factors explained the remaining 65% (95% CI, 46–87) of variance. Dietary vitamin C was protective against both nuclear cataract at baseline and nuclear cataract progression (β = −0.0002, P = 0.01 and β = −0.001, P = 0.03, respectively), whereas manganese and intake of micronutrient supplements were protective against nuclear cataract at baseline only (β = −0.009, P = 0.03 and β = −0.03, P = 0.01, respectively). Conclusions Genetic factors explained 35% of the variation in progression of nuclear cataract over a 10-year period. Environmental factors accounted for the remaining variance, and in particular, dietary vitamin C protected against cataract progression assessed approximately 10 years after baseline.
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Affiliation(s)
- Ekaterina Yonova-Doing
- Department of Twin Research and Genetic Epidemiology, Kings College London, London, United Kingdom
| | - Zoe A Forkin
- Department of Twin Research and Genetic Epidemiology, Kings College London, London, United Kingdom; University of Warwick Medical School, Coventry, United Kingdom
| | - Pirro G Hysi
- Department of Twin Research and Genetic Epidemiology, Kings College London, London, United Kingdom
| | - Katie M Williams
- Department of Ophthalmology, Kings College London, London, United Kingdom
| | - Tim D Spector
- Department of Twin Research and Genetic Epidemiology, Kings College London, London, United Kingdom
| | - Clare E Gilbert
- London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Christopher J Hammond
- Department of Twin Research and Genetic Epidemiology, Kings College London, London, United Kingdom; Department of Ophthalmology, Kings College London, London, United Kingdom.
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141
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Subczynski WK, Mainali L, Raguz M, O'Brien WJ. Organization of lipids in fiber-cell plasma membranes of the eye lens. Exp Eye Res 2016; 156:79-86. [PMID: 26988627 DOI: 10.1016/j.exer.2016.03.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 02/02/2016] [Accepted: 03/07/2016] [Indexed: 11/15/2022]
Abstract
The plasma membrane together with the cytoskeleton forms the only supramolecular structure of the matured fiber cell which accounts for mostly all fiber cell lipids. The purpose of this review is to inform researchers about the importance of the lipid bilayer portion of the lens fiber cell plasma membranes in the maintaining lens homeostasis, and thus protecting against cataract development.
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Affiliation(s)
- Witold K Subczynski
- Department of Biophysics, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
| | - Laxman Mainali
- Department of Biophysics, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Marija Raguz
- Department of Biophysics, Medical College of Wisconsin, Milwaukee, WI 53226, USA; Department of Medical Physics and Biophysics, School of Medicine, University of Split, Split, Croatia
| | - William J O'Brien
- Department of Ophthalmology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
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142
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Lens regeneration using endogenous stem cells with gain of visual function. Nature 2016; 531:323-8. [PMID: 26958831 DOI: 10.1038/nature17181] [Citation(s) in RCA: 138] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 01/29/2016] [Indexed: 02/05/2023]
Abstract
The repair and regeneration of tissues using endogenous stem cells represents an ultimate goal in regenerative medicine. To our knowledge, human lens regeneration has not yet been demonstrated. Currently, the only treatment for cataracts, the leading cause of blindness worldwide, is to extract the cataractous lens and implant an artificial intraocular lens. However, this procedure poses notable risks of complications. Here we isolate lens epithelial stem/progenitor cells (LECs) in mammals and show that Pax6 and Bmi1 are required for LEC renewal. We design a surgical method of cataract removal that preserves endogenous LECs and achieves functional lens regeneration in rabbits and macaques, as well as in human infants with cataracts. Our method differs conceptually from current practice, as it preserves endogenous LECs and their natural environment maximally, and regenerates lenses with visual function. Our approach demonstrates a novel treatment strategy for cataracts and provides a new paradigm for tissue regeneration using endogenous stem cells.
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143
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Asha R, Gayathri Devi V, Abraham A. Lupeol, a pentacyclic triterpenoid isolated from Vernonia cinerea attenuate selenite induced cataract formation in Sprague Dawley rat pups. Chem Biol Interact 2016; 245:20-9. [DOI: 10.1016/j.cbi.2015.12.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 12/08/2015] [Accepted: 12/10/2015] [Indexed: 01/11/2023]
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144
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Pourafkari L, Mahdavi-Fard A, Nader ND. Effects of Statins on the Development of Cataract-the Long Standing Debate. Am J Cardiol 2016; 117:489-90. [PMID: 26721658 DOI: 10.1016/j.amjcard.2015.11.053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Accepted: 11/29/2015] [Indexed: 10/22/2022]
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145
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Datiles MB, Ansari RR, Yoshida J, Brown H, Zambrano AI, Tian J, Vitale S, Zigler JS, Ferris FL, West SK, Stark WJ. Longitudinal Study of Age-Related Cataract Using Dynamic Light Scattering: Loss of α-Crystallin Leads to Nuclear Cataract Development. Ophthalmology 2016; 123:248-254. [PMID: 26545319 PMCID: PMC4724511 DOI: 10.1016/j.ophtha.2015.10.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 10/04/2015] [Accepted: 10/06/2015] [Indexed: 01/14/2023] Open
Abstract
PURPOSE To conduct a longitudinal study on age-related nuclear cataracts using dynamic light scattering (DLS) to determine if cataract progression is associated with loss of the unbound form of the lens molecular chaperone protein, α-crystallin. DESIGN Natural history and cohort study. PARTICIPANTS Patients 30 years of age or older of either gender seeking treatment at the Wilmer Eye Institute Cornea-Cataract Department. METHODS All patients underwent a comprehensive dilated eye examination every 6 months, including slit-lamp grading of their lenses using the Age-Related Eye Disease Study (AREDS) clinical lens grading system and obtaining an estimate of unbound α-crystallin level in the nucleus, the α-crystallin index (ACI), using the National Aeronautics and Space Administration-National Eye Institute DLS device. We used a random effects statistical model to examine the relationship of lens opacity changes over time with ACI changes. MAIN OUTCOME MEASURES α-Crystallin Index (ACI) and AREDS nuclear cataract grade. RESULTS Forty-five patients (66 eyes) 34 to 79 years of age with AREDS nuclear lens grades of 0 to 3.0 were followed up every 6 months for a mean of 19 months (range, 6-36 months). We found that lenses with the lowest baseline levels of ACI had the most rapid progression of cataracts, whereas lenses with higher ACI at baseline had no or slower cataract progression. Lenses that lost α-crystallin at the highest rates during the study also had faster progression of nuclear cataracts than lenses with a slower rate of ACI loss. Kaplan-Meier survival curves showed that lenses with the lowest initial ACI had the highest risk of undergoing cataract surgery. CONCLUSIONS This longitudinal study corroborates our previous cross-sectional study finding that higher levels of unbound α-crystallin as assessed by ACI are associated with lower risk of cataract formation and that loss of ACI over time is associated with cataract formation and progression. This study suggested that assessment of ACI with the DLS device could be used as a surrogate for lens opacity risk in clinical studies, and for assessing nuclear cataract events in studies where cataract development may be a side effect of a drug or device.
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Affiliation(s)
- Manuel B Datiles
- National Eye Institute, National Institutes of Health, Bethesda, Maryland.
| | - Rafat R Ansari
- National Aeronautics and Space Administration-John H. Glenn Research Center, Cleveland, Ohio
| | - Junko Yoshida
- The Wilmer Eye Institute, Johns Hopkins University Hospital, Baltimore, Maryland; Department of Ophthalmology, University of Tokyo, Tokyo, Japan
| | - Holly Brown
- The Wilmer Eye Institute, Johns Hopkins University Hospital, Baltimore, Maryland
| | - Andrea I Zambrano
- The Wilmer Eye Institute, Johns Hopkins University Hospital, Baltimore, Maryland
| | - Jing Tian
- The Wilmer Eye Institute, Johns Hopkins University Hospital, Baltimore, Maryland
| | - Susan Vitale
- National Eye Institute, National Institutes of Health, Bethesda, Maryland
| | - J Samuel Zigler
- The Wilmer Eye Institute, Johns Hopkins University Hospital, Baltimore, Maryland
| | - Frederick L Ferris
- National Eye Institute, National Institutes of Health, Bethesda, Maryland
| | - Sheila K West
- The Wilmer Eye Institute, Johns Hopkins University Hospital, Baltimore, Maryland
| | - Walter J Stark
- The Wilmer Eye Institute, Johns Hopkins University Hospital, Baltimore, Maryland
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146
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Wang F, Ma J, Han F, Guo X, Meng L, Sun Y, Jin C, Duan H, Li H, Peng Y. DL-3-n-butylphthalide delays the onset and progression of diabetic cataract by inhibiting oxidative stress in rat diabetic model. Sci Rep 2016; 6:19396. [PMID: 26759189 PMCID: PMC4725374 DOI: 10.1038/srep19396] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 12/07/2015] [Indexed: 11/15/2022] Open
Abstract
DL-3-n-butylphthalide (NBP) is a therapeutic drug used for ischemic stroke treatment. Here, we investigated the impact of NBP on the development of rat diabetic cataract induced by intraperitoneal injection of streptozotocin (STZ). NBP was then administrated by oral gavage for nine weeks. Cataract development was monitored through ophthalmoscope inspections. The levels of blood glucose and serum reactive oxygen species (ROS), malondialdehyde (MDA) and 8-Hydroxydeovexyguanosine (8-OHdG) were measured. Total and soluble protein and oxidative stress parameters, such as 2, 4- dinitrophenylhydrazone (DNP), 4-hydroxynonenal (4-HNE) and MDA in the lenses were determined by Western blot and thiobarbituric acid analyses. The expressions of NF-E2-related factor 2 (Nrf2) and its downstream antioxidant enzymes, thioredoxin (TRX), Catalase and nuclear accumulation of Nrf2 were determined by Western blot and immunohistochemistry analyses. We showed that NBP treatment significantly improved the cataract scores, the levels of DNP, 4-HNE, and MDA in the lens compared to the non-treated groups. NBP also enhanced the expressions of Nrf2, TRX and catalase in the lens of diabetic rats. In addition, NBP treatment also decreased levels of blood glucose, serum MDA and 8-OHdG. These results suggested that NBP treatment significantly delayed the onset and progression of diabetic cataract by inhibiting the oxidative stresses.
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Affiliation(s)
- Fuxu Wang
- Department of Hematology, the Second Hospital of Hebei Medical University, 215 Western Heping Road, Shijiazhuang 050000, China
| | - Jia Ma
- Department of Ophthalmology, the Second Hospital of Hebei Medical University, 215 Western Heping Road, Shijiazhuang 050000, China
| | - Fei Han
- Department of Digestology, the Second Hospital of Hebei Medical University, 215 Western Heping Road, Shijiazhuang 050000, China
| | - Xiujin Guo
- Department of Ophthalmology, the Second Hospital of Hebei Medical University, 215 Western Heping Road, Shijiazhuang 050000, China
| | - Li Meng
- Laboratorical center for Electron Microscopy, Hebei Medical University, 361 Eastern Zhongshan Road, Shijiazhuang 050017, China
| | - Yufeng Sun
- Department of Digestology, the Second Hospital of Hebei Medical University, 215 Western Heping Road, Shijiazhuang 050000, China
| | - Cheng Jin
- Department of Histology and Embryology, Hebei Medical University, 361 Eastern Zhongshan Road, Shijiazhuang 050017, China
| | - Huijun Duan
- Department of Pathology, Hebei Medical University, 361 Eastern Zhongshan Road, Shijiazhuang 050017, China
| | - Hang Li
- Department of Histology and Embryology, Hebei Medical University, 361 Eastern Zhongshan Road, Shijiazhuang 050017, China.,Department of Pathology, Hebei Medical University, 361 Eastern Zhongshan Road, Shijiazhuang 050017, China
| | - Ying Peng
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences &Peking Union Medical College, Beijing 100050, China
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147
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Zhou D, Yin D, Xiao F, Hao J. Expressions of Senescence-Associated β-Galactosidase and Senescence Marker Protein-30 are Associated with Lens Epithelial Cell Apoptosis. Med Sci Monit 2015; 21:3728-35. [PMID: 26619319 PMCID: PMC4671402 DOI: 10.12659/msm.895596] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Accepted: 10/21/2015] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND To investigate associations of senescence marker protein-30 and senescence-associated β-galactosidase expression with lens epithelial cells apoptosis among Chinese age-related cataract patients. MATERIAL AND METHODS A total of 145 age-related cataract patients (69 cases with nuclear cataract in 91 eyes and 76 cases of cortical cataract with 102 eyes) were enrolled in our study. An annular tear of the central part of anterior lens capsules was performed for each patient. Immunohistochemical staining and real-time PCR were used to detect the protein and mRNA expression levels, and TUNEL was used to assess lens epithelial cells apoptosis. Comparisons of protein expression levels and lens epithelial cells apoptosis were made between the 2 groups. RESULTS The results showed a higher protein expression level of senescence marker protein-30 in surrounding parts of the anterior lens capsule compared with the central part of the anterior lens capsule; however, the positive rate of senescence-associated β-galactosidase was remarkably higher in the central part than in the surrounding part. Compared with cortical cataract patients, nuclear cataract patients had elevated senescence marker protein-30 protein and mRNA expression levels, but had a decreased positive rate of senescence-associated β-galactosidase. TUNEL results showed that the lens epithelial cell apoptosis rate was higher in the central part of the anterior lens capsule than in the surrounding part in both groups. Within either central or surrounding area of anterior lens capsule, cortical cataract patients exhibited a significantly higher lens epithelial cell apoptosis rate in contrast with nuclear cataract patients. CONCLUSIONS Our study results suggest that senescence marker protein-30 and senescence-associated β-galactosidase expressions in both nuclear cataract and cortical cataract patients were associated with lens epithelial cells apoptosis.
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Affiliation(s)
| | | | | | - Jie Hao
- Corresponding Author: Jie Hao, e-mail:
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148
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Abstract
Worldwide, the prevalence of moderate to severe visual impairment and blindness is 285 millions, with 65% of visually impaired and 82% of all blind people being 50 years and older. Meta-analyses have shown that two out of three blind people are women, a gender discrepancy that holds true for both developed and developing countries. Cataract accounts for more than half of all blindness globally and gender inequity in access to cataract surgery is the major cause of the higher prevalence of blindness in women. In addition to gender differences in cataract surgical coverage, population-based studies on the prevalence of lens opacities indicate that women have a higher risk of developing cataract. Laboratory as well as epidemiologic studies suggest that estrogen may confer antioxidative protection against cataractogenesis, but the withdrawal effect of estrogen in menopause leads to increased risk of cataract in women. For the other major age-related eye diseases; glaucoma, age-related macular degeneration (AMD) and diabetic retinopathy, data are inconclusive. Due to anatomic factors, angle closure glaucoma is more common in women, whereas the dominating glaucoma type; primary open-angle glaucoma (POAG), is more prevalent in men. Diabetic retinopathy also has a male predominance and vascular/circulatory factors have been implied both in diabetic retinopathy and in POAG. For AMD, data on gender differences are conflicting although some studies indicate increased prevalence of drusen and neovascular AMD in women. To conclude, both biologic and socioeconomic factors must be considered when investigating causes of gender differences in the prevalence of age-related eye disease.
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149
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Rao P, Millen AE, Meyers KJ, Liu Z, Voland R, Sondel S, Tinker L, Wallace RB, Blodi BA, Binkley N, Sarto G, Robinson J, LeBlanc E, Mares JA. The Relationship Between Serum 25-Hydroxyvitamin D Levels and Nuclear Cataract in the Carotenoid Age-Related Eye Study (CAREDS), an Ancillary Study of the Women's Health Initiative. Invest Ophthalmol Vis Sci 2015; 56:4221-30. [PMID: 26132781 DOI: 10.1167/iovs.15-16835] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
PURPOSE To investigate the relationship between serum 25-hydroxyvitamin D (25[OH]D) levels and nuclear cataract among participants of the Carotenoids in Age-Related Eye Disease Study (CAREDS), an ancillary study of the Women's Health Initiative (WHI) Observational Study (OS). METHODS Nuclear cataract was assessed from slit lamp photographs (2001-2004) taken 6 years after collecting serum analyzed for 25(OH)D levels at WHI baseline (1994-1998) in 1278 CAREDS participants age 50 to 79 years. Multivariate (age, iris color, smoking, pulse pressure) odds ratios (ORs) for nuclear cataract (nuclear opacities > level 4 or cataract extraction) by quintiles of serum 25(OH)D were estimated using logistic regression. RESULTS No significant association was observed between serum 25(OH)D and nuclear cataract among women of all ages (age-adjusted OR [95% confidence interval (CI)] 0.97 [0.65-1.45]). However, there was a significant age interaction (P for interaction = 0.04). There were no significant associations in the women 70 years or older. In women younger than 70 years, we observed an inverse association between serum 25(OH)D and nuclear cataract (multivariate adjusted ORs [95% CI] 0.54 [0.29-0.99] and 0.66 [0.36-1.20] for quintiles 4 and 5 vs. 1, respectively; P = 0.03). Further adjustment for 25(OH)D determinants (body mass index, vitamin D intake, and UVB exposure) attenuated this association. CONCLUSIONS Serum 25(OH)D levels were unrelated to nuclear opacities in this study sample. However, exploratory analyses suggest a protective association in women younger than 70 years. Further investigations of the relationship between vitamin D and nuclear lens opacities are warranted.
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Affiliation(s)
- Prethy Rao
- Department of Ophthalmology and Visual Sciences University of Wisconsin, Madison, Wisconsin, United States
| | - Amy E Millen
- Department of Social and Preventive Medicine, School of Public Health and Health Professions, University at Buffalo, The State University of New York, Buffalo, New York, United States
| | - Kristin J Meyers
- Department of Ophthalmology and Visual Sciences University of Wisconsin, Madison, Wisconsin, United States
| | - Zhe Liu
- Department of Ophthalmology and Visual Sciences University of Wisconsin, Madison, Wisconsin, United States
| | - Rickie Voland
- Department of Ophthalmology and Visual Sciences University of Wisconsin, Madison, Wisconsin, United States
| | - Sheri Sondel
- Department of Ophthalmology and Visual Sciences University of Wisconsin, Madison, Wisconsin, United States
| | - Lesley Tinker
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States
| | - Robert B Wallace
- Department of Epidemiology, University of Iowa, Iowa City, Iowa, United States
| | - Barbara A Blodi
- Department of Ophthalmology and Visual Sciences University of Wisconsin, Madison, Wisconsin, United States
| | - Neil Binkley
- Department of Medicine, University of Wisconsin, Madison, Wisconsin, United States
| | - Gloria Sarto
- Department of Obstetrics and Gynecology, University of Wisconsin, Madison, Wisconsin, United States
| | - Jennifer Robinson
- Department of Epidemiology, University of Iowa, Iowa City, Iowa, United States
| | - Erin LeBlanc
- Kaiser Permanente Center for Health Research, Portland, Oregon, United States
| | - Julie A Mares
- Department of Ophthalmology and Visual Sciences University of Wisconsin, Madison, Wisconsin, United States
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150
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Abstract
PURPOSE To evaluate the association between different amounts of alcohol consumption and the risk of age-related cataract. METHODS We searched PubMed and Embase from their inception until May 2014 for case-control or cohort studies with data on alcohol consumption and age-related cataract. Heavy alcohol consumption was defined as more than two standard drinks per day, which is equal to a daily intake of 20 g of alcohol or 140 g per week. Moderate consumption was defined as less than 20 g of alcohol per day but more than never any. We performed separate meta-analyses for the associations of moderate or heavy alcohol consumption with age-related cataract under a random-effects model, respectively. RESULTS Five case-control and five cohort studies were identified through comprehensive literature search. In the meta-analysis of 10 studies, the associations between moderate alcohol consumption and age-related cataract were marginally nonsignificant (pooled relative risk, 0.88; 95% confidence interval, 0.74 to 1.05; I = 82.1%), whereas heavy alcohol consumption was associated with an increased risk of age-related cataract (pooled relative risk, 1.26; 95% confidence interval, 1.06 to 1.50; I = 58.9%). The association between heavy alcohol consumption and cataract was stronger in case-control than in cohort studies. Adjusting for smoking as a potential confounder attenuated the association between heavy alcohol consumption and cataract. CONCLUSIONS Heavy alcohol consumption significantly increased the risk of age-related cataract, whereas moderate consumption may be protective for this ocular condition. Clinically, information on a patient's alcohol drinking history might be valuable to general physicians and ophthalmologists when there is a diagnosis of age-related cataract and should be collected on a routine basis in eye clinics.
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