Single and repeated low-dose UVB radiation exposures affect the visual system

Single and repeated low-dose UVB radiation exposures affect the visual system

The visual system is an important biological indicator of effects induced by ultraviolet (UV) radiation. However, research has extensively investigated the effects of high-dose UV radiation in a single exposure, thus, the differential of this work was to investigate the effects of UVB radiation in l...

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Bibliographic Details
Published in:Journal of photochemistry and photobiology. B, Biology Vol. 209; p. 111941
Main Authors: Vaz, Valmor Vinicius Araujo, Jardim da Silva, Leandra, Geihs, Márcio Alberto, Maciel, Fábio Everton, Nery, Luiz Eduardo Maia, Vargas, Marcelo Alves
Format: Journal Article
Language:English
Published: Lausanne Elsevier B.V 01-08-2020
Elsevier BV
Subjects:
Antioxidants
Biological effects
Catalase
Crustacean
Crustaceans
Environmental effects
Exposure
Eyestalk
Glutathione
Glutathione transferase
Granulation
Hemocytes
Indicator species
Inflammation
Lobes
Medulla oblongata
Morphological alterations
Neohelice granulata
Nervous system
Oxidative stress
Peroxyl radicals
Radiation dosage
Radiation effects
Reactive oxygen species
Retina
Ultraviolet radiation
Visual system
Morphological alterations
Oxidative stress
Eyestalk
Nervous system
Crustacean
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Summary:The visual system is an important biological indicator of effects induced by ultraviolet (UV) radiation. However, research has extensively investigated the effects of high-dose UV radiation in a single exposure, thus, the differential of this work was to investigate the effects of UVB radiation in low doses in single and repeated exposure. Therefore, we investigated the effects of repeated exposure to environmental UVB doses (0.09 J/cm2) on the retina and optic lobes of the crab Neohelice granulata. We evaluated the reactive oxygen species (ROS) concentration, antioxidant capacity against peroxyl radicals (ACAP) levels, catalase (CAT) and glutathione S-transferase (GST) activities and lipoperoxidation (LPO) levels and performed histological analysis. The crabs were exposed to UVB radiation for 1 or 60 days, while the control group was exposed to visible light. In the retina region, increases in ROS concentration and CAT and GST activities after the single exposure were observed. After 60 days of exposure, we observed an increase in ACAP levels. In the optic lobes, we observed an increase in GST activity and a decrease in LPO levels after the single exposure. However, we observed an increase in ROS concentration after 60 days of exposure. Moreover, after 60 days of exposure, infiltrating hemocytes in the retina and disorganization in neuron cell bodies of the external medulla were observed. In this sense, single and repeated exposure to low doses of UVB radiation induced changes in oxidative status and inflammatory process in the visual system of the crab Neohelice granulata. [Display omitted]
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ISSN:1011-1344
1873-2682
DOI:10.1016/j.jphotobiol.2020.111941