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Wang M, Wang WX. Meeting Zn Needs during Medaka Eye Development: Nanoscale Visualization of Retina by Expansion Microscopy. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:15780-15790. [PMID: 36266765 DOI: 10.1021/acs.est.2c06479] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Fish eyes require high Zn levels to support their early development. Although numerous studies have been conducted on the nutritional and toxic effects of Zn on the eye, the Zn requirement for retinal cell development is still debatable. Moreover, due to the complexity of the retinal structure, it is difficult to clearly visualize each retinal layer and accurately separate cell morphology in vivo by conventional methods. In the present study, we for the first time have achieved nanoscale imaging of retinal anatomy affected by dietary and waterborne Zn exposure by novel expansion microscopy. We demonstrated that the fish retina showed different developmental strategies in response to dietary and aqueous Zn exposures. Excess dietary Zn produced toxicity to retinal photoreceptor cells, resulting in a reduction in cell number and cell area, and this toxicity became severe with biological development. In contrast, waterborne Zn in the natural environment probably failed to meet the Zn requirements of retinal development. Overall, our results indicated that during early development, the Zn requirement of the fish eyes was sensitive, and oversupplementation led to impaired photoreceptor cell development. Our study has provided new perspectives using the powerful and novel expansion microscopy technique in toxicity assessment, enabling ultra-clear visualization of small but complex organ development.
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Affiliation(s)
- Mengyu Wang
- School of Energy and Environment, State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong 518057, China
- Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
| | - Wen-Xiong Wang
- School of Energy and Environment, State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong 518057, China
- Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
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Gupta RK, Kaur I, Nag TC, Chhablani J. Diagnostic Electron Microscopy of Retina. Semin Ophthalmol 2018; 33:700-710. [PMID: 29388866 DOI: 10.1080/08820538.2017.1416415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The electron microscopy techniques were used in various fields as an analytical technique under in vitro conditions, which provides the sufficient resolution for better visualization and interpretation. This review gives a brief overview of the analytical application of transmission electron microscopy (TEM) and scanning electron microscopy (SEM) techniques and critical findings in different retinal pathologies. This review article aims to improvise understanding of retinal microstructures for clinicians which will help to improve the interpretation of the current advanced imaging techniques.
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Affiliation(s)
- Rishikesh Kumar Gupta
- a Kallam Anji Reddy Molecular Genetics Laboratory, Brien Holden Eye Research Centre , L V Prasad Eye Institute (KAR Campus) , Hyderabad , Telangana , India
| | - Inderjeet Kaur
- a Kallam Anji Reddy Molecular Genetics Laboratory, Brien Holden Eye Research Centre , L V Prasad Eye Institute (KAR Campus) , Hyderabad , Telangana , India
| | - Tapas C Nag
- c All India Institute of Medical Sciences , Department of Anatomy , New Delhi , India
| | - Jay Chhablani
- b Smt. Kanuri Santhamma Centre for Vitreo-Retinal Diseases , L V Prasad Eye Institute (KAR Campus) , Hyderabad , Telangana , India
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Castro PL, Dominguez D, José Caballero M, Izquierdo M. Histochemical localization of zinc in the retina cells of gilthead sea bream (sparus aurata) fed different presentations of zinc. Synapse 2016; 71. [DOI: 10.1002/syn.21947] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Accepted: 11/06/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Pedro Luis Castro
- Grupo de Investigación en Acuicultura (GIA), IU-ECOAQUA, Universidad de Las Palmas de Gran Canaria Crta. Taliarte s/n; Telde 35214 Spain
| | - David Dominguez
- Grupo de Investigación en Acuicultura (GIA), IU-ECOAQUA, Universidad de Las Palmas de Gran Canaria Crta. Taliarte s/n; Telde 35214 Spain
| | - María José Caballero
- Grupo de Investigación en Acuicultura (GIA), IU-ECOAQUA, Universidad de Las Palmas de Gran Canaria Crta. Taliarte s/n; Telde 35214 Spain
| | - Marisol Izquierdo
- Grupo de Investigación en Acuicultura (GIA), IU-ECOAQUA, Universidad de Las Palmas de Gran Canaria Crta. Taliarte s/n; Telde 35214 Spain
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Kim YH, Kwak KA, Kim TS, Seok JH, Roh HS, Lee JK, Jeong J, Meang EH, Hong JS, Lee YS, Kang JS. Retinopathy Induced by Zinc Oxide Nanoparticles in Rats Assessed by Micro-computed Tomography and Histopathology. Toxicol Res 2015; 31:157-63. [PMID: 26191382 PMCID: PMC4505346 DOI: 10.5487/tr.2015.31.2.157] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 05/25/2015] [Accepted: 06/08/2015] [Indexed: 01/03/2023] Open
Abstract
Nanotechnology has advanced at an extremely rapid pace over the past several years in numerous fields of research. However, the uptake of nanoparticles (NPs) into the body after administration through various routes may pose a risk to human health. In this study, we investigated the potential ocular toxicity of 20-nm, negatively- charged zinc oxide (ZnO) NPs in rats using micro-computed tomography (micro-CT) and histopathological assessment. Animals were divided into four groups as control group, ZnO NPs treatment group (500 mg/kg/day), control recovery group, and ZnO NPs treatment and recovery group. Ocular samples were prepared from animals treated for 90 days (10 males and 10 females, respectively) and from recovery animals (5 males and 5 females, respectively) sacrificed at 14 days after final treatment and were compared to age-matched control animals. Micro-CT analyses represented the deposition and distribution of foreign materials in the eyes of rats treated with ZnO NPs, whereas control animals showed no such findings. X-ray fluorescence spectrometry and energy dispersive spectrometry showed the intraocular foreign materials as zinc in treated rats, whereas control animals showed no zinc signal. Histopathological examination revealed the retinopathy in the eyes of rats treated with ZnO NPs. Neuronal nuclei expression was decreased in neurons of the ganglion cell layer of animals treated with ZnO NPs compared to the control group. Taken together, treatment with 20-nm, negatively-charged ZnO NPs increased retinopathy, associated with local distribution of them in ocular lesions.
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Affiliation(s)
- Young Hee Kim
- Department of Biomedical Laboratory Science, Namseoul University, Cheonan, Korea
| | - Kyung A Kwak
- Department of Biomedical Laboratory Science, Namseoul University, Cheonan, Korea
| | - Tae Sung Kim
- Toxicological Research Division, National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Osong Health Technology Administration Complex, Cheongwon, Korea
| | - Ji Hyeon Seok
- Toxicological Research Division, National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Osong Health Technology Administration Complex, Cheongwon, Korea
| | - Hang Sik Roh
- Toxicological Research Division, National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Osong Health Technology Administration Complex, Cheongwon, Korea
| | - Jong-Kwon Lee
- Toxicological Research Division, National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Osong Health Technology Administration Complex, Cheongwon, Korea
| | - Jayoung Jeong
- Toxicological Research Division, National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Osong Health Technology Administration Complex, Cheongwon, Korea
| | - Eun Ho Meang
- Health Care Research Laboratory, Korea Testing and Research Institute, Seoul, Korea
| | - Jeong-Sup Hong
- Health Care Research Laboratory, Korea Testing and Research Institute, Seoul, Korea
| | - Yun Seok Lee
- Department of Health Administration, Namseoul University, Cheonan, Korea
| | - Jin Seok Kang
- Department of Biomedical Laboratory Science, Namseoul University, Cheonan, Korea
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Ugarte M, Osborne NN. Recent advances in the understanding of the role of zinc in ocular tissues. Metallomics 2014; 6:189-200. [DOI: 10.1039/c3mt00291h] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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The mechanisms of Zn2+ effects on Ca2+-permeable AMPA receptors on carp retinal horizontal cells. Brain Res 2010; 1345:103-9. [DOI: 10.1016/j.brainres.2010.05.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2010] [Revised: 05/11/2010] [Accepted: 05/11/2010] [Indexed: 11/18/2022]
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Sun Y, Jiang XD, Liu X, Gong HQ, Liang PJ. Synaptic contribution of Ca2+-permeable and Ca2+-impermeable AMPA receptors on isolated carp retinal horizontal cells and their modulation by Zn2+. Brain Res 2010; 1317:60-8. [PMID: 20045401 DOI: 10.1016/j.brainres.2009.12.068] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Revised: 12/02/2009] [Accepted: 12/21/2009] [Indexed: 10/20/2022]
Abstract
Ca(2+)-permeable and Ca(2+)-impermeable AMPA receptors are co-expressed on carp retinal horizontal cells. In the present study, we examined the synaptic contribution and Zn(2+) modulatory effect of these two AMPA receptor subtypes using whole-cell patch clamp technique. Specific Ca(2+)-permeable AMPA receptor antagonist (1-naphthyl acetyl spermine, NAS) and selective Ca(2+)-impermeable AMPA receptor blocker (pentobarbital, PB) were used to separate the glutamate-response in isolated H1 horizontal cell mediated by these two subtypes of AMPA receptors respectively. Application of 100 microM NAS substantially suppressed the current elicited by 3 mM glutamate and the remaining NAS-insensitive component was completely blocked by application of 100 microM PB. In addition, Zn(2+) had dual effects on Ca(2+)-permeable AMPA receptor-mediated current: at low concentration (10 microM), Zn(2+) potentiated the current, but at higher concentrations (100 and 1000 microM), Zn(2+) reduced the current in a dose-dependent manner. However, Zn(2+) (10, 100 and 1000 microM) failed to modulate the NAS-insensitive current mediated by Ca(2+)-impermeable AMPA receptors. Overall, our results suggest that Ca(2+)-permeable AMPA receptors contribute more to the cell's glutamate-response than Ca(2+)-impermeable AMPA receptors. Furthermore, Zn(2+) has dual effects on the Ca(2+)-permeable AMPA receptor activity without affecting Ca(2+)-impermeable AMPA receptors.
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Affiliation(s)
- Yan Sun
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dong-Chuan Road, Shanghai 200240, China
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Sun Z, Zhang DQ, McMahon DG. Zinc modulation of hemi-gap-junction channel currents in retinal horizontal cells. J Neurophysiol 2009; 101:1774-80. [PMID: 19176613 DOI: 10.1152/jn.90581.2008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Hemi-gap-junction (HGJ) channels of retinal horizontal cells (HCs) function as transmembrane ion channels that are modulated by voltage and calcium. As an endogenous retinal neuromodulator, zinc, which is coreleased with glutamate at photoreceptor synapses, plays an important role in shaping visual signals by acting on postsynaptic HCs in vivo. To understand more fully the regulation and function of HC HGJ channels, we examined the effect of Zn(2+) on HGJ channel currents in bass retinal HCs. Hemichannel currents elicited by depolarization in Ca(2+)-free medium and in 1 mM Ca(2+) medium were significantly inhibited by extracellular Zn(2+). The inhibition by Zn(2+) of hemichannel currents was dose dependent with a half-maximum inhibitory concentration of 37 microM. Compared with other divalent cations, Zn(2+) exhibited higher inhibitory potency, with the order being Zn(2+) > Cd(2+) approximately Co(2+) > Ca(2+) > Ba(2+) > Mg(2+). Zn(2+) and Ca(2+) were found to modulate HGJ channels independently in additivity experiments. Modification of histidine residues with N-bromosuccinimide suppressed the inhibitory action of Zn(2+), whereas modification of cysteine residues had no significant effect on Zn(2+) inhibition. Taken together, these results suggest that zinc acts on HGJ channels in a calcium-independent way and that histidine residues on the extracellular domain of HGJ channels mediate the inhibitory action of zinc.
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Affiliation(s)
- Ziyi Sun
- Department of Biological Sciences, Vanderbilt University, VU Station B, Box 35-1634, Nashville, TN 37235-1634, USA
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