Quantitative action spectroscopy reveals ARPE19 sensitivity to ultraviolet radiation at 350 nm and 380 nm
Abstract The role of ultraviolet radiation (UVR) exposure in the aetiology of retinal degeneration has been debated for decades with epidemiological evidence failing to find a clear consensus for or against it playing a role. A key reason for this is a lack of foundational research into the response...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-08-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-17251-7 |
| _version_ | 1811340380161966080 |
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| author | Graham Anderson Andrew McLeod Pierre Bagnaninchi Baljean Dhillon |
| author_facet | Graham Anderson Andrew McLeod Pierre Bagnaninchi Baljean Dhillon |
| author_sort | Graham Anderson |
| collection | DOAJ |
| description | Abstract The role of ultraviolet radiation (UVR) exposure in the aetiology of retinal degeneration has been debated for decades with epidemiological evidence failing to find a clear consensus for or against it playing a role. A key reason for this is a lack of foundational research into the response of living retinal tissue to UVR in regard to modern ageing-specific parameters of tissue function. We therefore explored the response of cultured retinal pigmented epithelium (RPE), the loss of which heralds advanced visual decline, to specific wavelengths of UVR across the UV-B and UV-A bands found in natural sunlight. Using a bespoke in vitro UVR exposure apparatus coupled with bandpass filters we exposed the immortalised RPE cell line, ARPE-19, to 10 nm bands of UVR between 290 and 405 nm. Physical cell dynamics were assessed during exposure in cells cultured upon specialist electrode culture plates which allow for continuous, non-invasive electrostatic interrogation of key cell parameters during exposure such as monolayer coverage and tight-junction integrity. UVR exposures were also utilised to quantify wavelength-specific effects using a rapid cell viability assay and a phenotypic profiling assay which was leveraged to simultaneously quantify intracellular reactive oxygen species (ROS), nuclear morphology, mitochondrial stress, epithelial integrity and cell viability as part of a phenotypic profiling approach to quantifying the effects of UVR. Electrical impedance assessment revealed unforeseen detrimental effects of UV-A, beginning at 350 nm, alongside previously demonstrated UV-B impacts. Cell viability analysis also highlighted increased effects at 350 nm as well as 380 nm. Effects at 350 nm were further substantiated by high content image analysis which highlighted increased mitochondrial dysfunction and oxidative stress. We conclude that ARPE-19 cells exhibit a previously uncharacterised sensitivity to UV-A radiation, specifically at 350 nm and somewhat less at 380 nm. If upheld in vivo, such sensitivity will have impacts upon geoepidemiological risk scoring of macular sensitivity. |
| first_indexed | 2024-04-13T18:41:11Z |
| format | Article |
| id | doaj.art-d4d42030271849058521967be191ddc5 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-13T18:41:11Z |
| publishDate | 2022-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-d4d42030271849058521967be191ddc52022-12-22T02:34:43ZengNature PortfolioScientific Reports2045-23222022-08-0112111010.1038/s41598-022-17251-7Quantitative action spectroscopy reveals ARPE19 sensitivity to ultraviolet radiation at 350 nm and 380 nmGraham Anderson0Andrew McLeod1Pierre Bagnaninchi2Baljean Dhillon3Scottish Centre for Regenerative Medicine, University of EdinburghSchool of Geosciences, University of EdinburghScottish Centre for Regenerative Medicine, University of EdinburghCenter for Clinical Brain Sciences, University of EdinburghAbstract The role of ultraviolet radiation (UVR) exposure in the aetiology of retinal degeneration has been debated for decades with epidemiological evidence failing to find a clear consensus for or against it playing a role. A key reason for this is a lack of foundational research into the response of living retinal tissue to UVR in regard to modern ageing-specific parameters of tissue function. We therefore explored the response of cultured retinal pigmented epithelium (RPE), the loss of which heralds advanced visual decline, to specific wavelengths of UVR across the UV-B and UV-A bands found in natural sunlight. Using a bespoke in vitro UVR exposure apparatus coupled with bandpass filters we exposed the immortalised RPE cell line, ARPE-19, to 10 nm bands of UVR between 290 and 405 nm. Physical cell dynamics were assessed during exposure in cells cultured upon specialist electrode culture plates which allow for continuous, non-invasive electrostatic interrogation of key cell parameters during exposure such as monolayer coverage and tight-junction integrity. UVR exposures were also utilised to quantify wavelength-specific effects using a rapid cell viability assay and a phenotypic profiling assay which was leveraged to simultaneously quantify intracellular reactive oxygen species (ROS), nuclear morphology, mitochondrial stress, epithelial integrity and cell viability as part of a phenotypic profiling approach to quantifying the effects of UVR. Electrical impedance assessment revealed unforeseen detrimental effects of UV-A, beginning at 350 nm, alongside previously demonstrated UV-B impacts. Cell viability analysis also highlighted increased effects at 350 nm as well as 380 nm. Effects at 350 nm were further substantiated by high content image analysis which highlighted increased mitochondrial dysfunction and oxidative stress. We conclude that ARPE-19 cells exhibit a previously uncharacterised sensitivity to UV-A radiation, specifically at 350 nm and somewhat less at 380 nm. If upheld in vivo, such sensitivity will have impacts upon geoepidemiological risk scoring of macular sensitivity.https://doi.org/10.1038/s41598-022-17251-7 |
| spellingShingle | Graham Anderson Andrew McLeod Pierre Bagnaninchi Baljean Dhillon Quantitative action spectroscopy reveals ARPE19 sensitivity to ultraviolet radiation at 350 nm and 380 nm Scientific Reports |
| title | Quantitative action spectroscopy reveals ARPE19 sensitivity to ultraviolet radiation at 350 nm and 380 nm |
| title_full | Quantitative action spectroscopy reveals ARPE19 sensitivity to ultraviolet radiation at 350 nm and 380 nm |
| title_fullStr | Quantitative action spectroscopy reveals ARPE19 sensitivity to ultraviolet radiation at 350 nm and 380 nm |
| title_full_unstemmed | Quantitative action spectroscopy reveals ARPE19 sensitivity to ultraviolet radiation at 350 nm and 380 nm |
| title_short | Quantitative action spectroscopy reveals ARPE19 sensitivity to ultraviolet radiation at 350 nm and 380 nm |
| title_sort | quantitative action spectroscopy reveals arpe19 sensitivity to ultraviolet radiation at 350 nm and 380 nm |
| url | https://doi.org/10.1038/s41598-022-17251-7 |
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