Baseline defense system of commercial male king crab Lithodes santolla from the Beagle Channel

Abstract

Environmental and physiological variations influence the steady-state concentration of free oxygen radicals in cells. Because of the seasonal life cycle of Lithodes santolla in the Beagle Channel, a baseline study of the antioxidant physiological variations along the seasons is necessary for a better understanding of its ecophysiology. The aim of this study was to evaluate the seasonal variations in gills, hemolymph, muscle and hepatopancreas of the: i) enzymatic activities of superoxide dismutase, catalase, glutathione peroxidase and glutathione transferase; ii) ascorbic acid and total glutathione; iii) lipid peroxidation and protein oxidation; iv) glucose, proteins and pH. Seasonality found in the antioxidant defense system of L. santolla from the Beagle Channel acts in a collaborative way during the most relevant life cycle phases (reproduction and molting), avoiding a long term oxidative stress. The antioxidant system also shows changes in the enzymatic activities likely caused by the environmental factors, such as low temperatures during winter and spring seasons.

Molecular characterization and upregulation of cytosolic manganese superoxide dismutase by imidazole derivative KK-42 in Macrobrachium nipponense

“…Our results revealed that fluctuations in the expression of cytMnSOD were influenced by the molting cycle, and that the highest level of expression was observed during intermolt, suggesting that transcription of this gene may be regulated by ecdysone. Moreover, marked changes in oxygen consumption during the molting cycle may affect MnSOD expression (Engel et al, 2001;Schvezov et al, 2015).…”

Thiol oxidation of hemolymph proteins in oysters Crassostrea brasiliana as markers of oxidative damage induced by urban sewage exposure

“…Only a few studies have examined protein oxidative damage in hemolymph or hemocytes of invertebrates, and most of them analyzed protein carbonylation. For example, increased protein carbonyl concentrations were reported in crabs and mussels in response to seasonal changes and exposure to organic contaminants, metals , and nanoparticles . Protein oxidation in other tissues, including gills and digestive gland, has also been studied.…”

A baseline study of the metallothioneins content in digestive gland of the Norway lobster Nephrops norvegicus from Northern Adriatic Sea: Body size, season, gender and metal specific variability

“…Levels of ROS displayed different seasonal pattern for small and large lobsters possibly in relation to fluctuations of environmental abiotic and biotic factors within the investigated areas, that were shown to influence the balance between pro-oxidant and antioxidant activity and maintenance of a steady-state ROS level in crustaceans (Liu et al, 2007;Schvezov et al, 2015).…”