Special Issue "Oxidative Stress in Aquatic Organisms"

Submission Deadline: 30 April 2021 (closed)
Guest Editors

Dr Susana Puntarulo, University of Buenos Aires, susanap@ffyb.uba.ar


Dr Paula M González, University of Buenos Aires, paulag@ffyb.uba.ar

Summary

Ecological changes generate a wide-open array of stress conditions in aquatic animals and photosynthetic organisms. These environmental modifications could be due to intrinsic biotic (e.g. biotoxins presence, sexual maturation, food quality, etc.) and/or abiotic (such as temperature, salinity, acidification, solar and UV radiation, tides, seasonality, etc.) factors. Even more, water bodies and oceans properties may fluctuate according to anthropological incidence such as pollution (e.g., metals), industrial and urban wastes, climate global change, etc. This scenario often promotes an induction of disbalance between the generation and elimination of reactive oxygen species (ROS) and reactive nitrosative species (RNS) in living organisms. Their production in cellular and extracellular systems has to be tightly controlled by antioxidants and radical scavenging biochemical reactions. The importance of radical species generation and the modification in their steady state concentration by alteration of either environmental or metabolic conditions, due to either natural or anthropogenic factors, and the effect on the cellular signaling and the maintenance of the homeostatic conditions in photosynthetic and non-photosynthetic organisms will be relevant contributions to this special issue.

 

This topic focuses on the frontiers in the knowledge on cellular mechanics and the advances in oxidative and nitrosative stress in aquatic organisms. Studies facing different levels of natural organization, such as molecular, cellular, physiological and ecological aspects are encouraged to be submitted.

 

We welcome biologists, biochemists, biophysics, physicists, and ecological researchers to contribute original articles and reviews (or mini-reviews) to this special issue.


Keywords
Aquatic Organisms, Antioxidant Capacity, Cellular Signaling, Environmental Changes, Homeostatic Conditions, Oxidative and Nitrosative Stress

Published Papers
  • Oxidative stress indicators in human and bottlenose dolphin leukocytes in response to a pro-inflammatory challenge
  • Abstract Marine mammals undergo cycles of tissue ischemia and reperfusion during the dive response. Reperfusion injury can result in oxidative tissue damage and the activation of a pro-inflammatory immune response. The risk of oxidative damage is reduced by antioxidants. Our hypothesis is that the reported higher antioxidant defenses within marine mammal tissues provide additional protection in situations that produce oxidative stress, like inflammation, in comparison to terrestrial mammal tissues. Leukocytes were isolated from the whole blood of Pacific bottlenose dolphins (Tursiops truncatus gilli) and humans (Homo sapiens) and were exposed to lipopolysaccharides (LPS, 10 µg/mL) in vitro to simulate a pro-inflammatory… More
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  • Oxidative metabolism of photosynthetic species and the exposure to some freshwater and marine biotoxins
  • Abstract Environmental climate conditions could lead to an increasing global occurrence of microorganism blooms that synthesize toxins in the aquatic environments. These blooms could result in significantly toxic events. Responses of photosynthetic organisms to adverse environmental conditions implicate reactive oxygen species generation; but, due to the presence of a varied cellular antioxidant defense system and complex signaling networks, this oxidative stress could act as an important factor in the environmental adaptive processes. The objective of this review was to assess how some biotoxins are implicated in the generation of oxidative and nitrosative metabolic changes, not only in biotoxin-producing organisms but also… More
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