NDLI: Influence of the dark/light rhythm on the effects of UV radiation in the eyestalk of the crab Neohelice granulata.

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Influence of the dark/light rhythm on the effects of UV radiation in the eyestalk of the crab Neohelice granulata.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Vargas, Marcelo Alves Geish, Marcio Alberto Maciel, Fabio Everton Cruz, Bruno Pinto Filgueira, Daza de Moraes Vaz Batista Ferreira, Gabrielle de Jesus Nery, Luiz Eduardo Maia Allodi, Silvana
Description	Country affiliation: Brazil Author Affiliation: Vargas MA ( Programa de Pós-Graduação em Ciências Morfológicas, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro-UFRJ, 21941-590, Rio de Janeiro, RJ, Brazil.)
Abstract	Crustaceans are interesting models to study the effects of ultraviolet (UV) radiation, and many species may be used as biomarkers for aquatic contamination of UV radiation reaching the surface of the Earth. Here, we investigated cell damage in the visual system of crabs Neohelice granulata that were acclimated to either 12L:12D, constant light, or constant dark, and were exposed to UVA or UVB at 12:00h (noon). The production of reactive oxygen species (ROS), antioxidant capacity against peroxyl radicals (ACAP), lipid peroxidation (LPO) damage, catalase activity, and pigment dispersion in the eye were evaluated. No significant differences from the three groups of controls (animals acclimated to 12L:12D, or in constant light, or not exposed to UV radiation) were observed in animals acclimated to 12L:12D, however, crabs acclimated to constant light and exposed to UV radiation for 30min showed a significant increase in ROS concentration, catalase activity, and LPO damage, but a decrease in ACAP compared with the controls. Crabs acclimated to constant darkness and exposed to UV for 30min showed a significantly increased ROS concentration and LPO damage, but the ACAP and catalase activity did not differ from the controls (animals kept in the dark while the experimental group was being exposed to UV radiation). Pigment dispersion in the pigment cells of eyes of animals acclimated to constant light was also observed. The results indicate that UVA and UVB alter specific oxidative parameters; however, the cell damage is more evident in animals deviated from the normal dark/light rhythm.
File Format	HTM / HTML
ISSN	15320456
Issue Number	3
Volume Number	151
Journal	Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology
Language	English
Publisher	Elsevier
Publisher Date	2010-04-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Toxicology Discipline Pharmacology Brachyura Radiation Effects Catalase Lipid Peroxidation Ultraviolet Rays Animals Antioxidants Metabolism Physiology Circadian Rhythm Dna Damage Male Photoperiod Pigments, Biological Reactive Oxygen Species Time Factors Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Cell Biology Physiology Health, Toxicology and Mutagenesis Medicine Aquatic Science Biochemistry Toxicology Animal Science and Zoology

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The effects of UV radiation on the visual system of the crab Neohelice granulata: a protective role of melatonin.

Daily variation of melatonin content in the optic lobes of the crab Neohelice granulata.

Damage caused during hypoxia and reoxygenation in the locomotor muscle of the crab Neohelice granulata (Decapoda: Varunidae).

Oxidative effects and toxin bioaccumulation after dietary microcystin intoxication in the hepatopancreas of the crab Neohelice (Chasmagnathus) granulata.

Antioxidant activity stimulated by ultraviolet radiation in the nervous system of a crustacean.

Effects of UV radiation on hatching, lipid peroxidation, and fatty acid composition in the copepod Paracyclopina nana.

Population structure of the burrowing crab Neohelice granulata (Brachyura, Varunidae) in a southwestern Atlantic salt marsh

Effect of ursolic acid, a triterpenoid antioxidant, on ultraviolet-B radiation-induced cytotoxicity, lipid peroxidation and DNA damage in human lymphocytes.

Air exposure behavior of the semiterrestrial crab Neohelice granulata allows tolerance to severe hypoxia but not prevent oxidative damage due to hypoxia-reoxygenation cycle.

Influence of the dark/light rhythm on the effects of UV radiation in the eyestalk of the crab Neohelice granulata.

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The effects of UV radiation on the visual system of the crab Neohelice granulata: a protective role of melatonin.

Daily variation of melatonin content in the optic lobes of the crab Neohelice granulata.

Damage caused during hypoxia and reoxygenation in the locomotor muscle of the crab Neohelice granulata (Decapoda: Varunidae).

Oxidative effects and toxin bioaccumulation after dietary microcystin intoxication in the hepatopancreas of the crab Neohelice (Chasmagnathus) granulata.

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Air exposure behavior of the semiterrestrial crab Neohelice granulata allows tolerance to severe hypoxia but not prevent oxidative damage due to hypoxia-reoxygenation cycle.

Influence of the dark/light rhythm on the effects of UV radiation in the eyestalk of the crab Neohelice granulata.