Arginine metabolism of the Antarctic Bivalve Laternula elliptica (King &amp; Broderip, 1831): an ecophysiological approach

Rodrigues, Edson; Santos, Marcela Rosana da Silva; Júnior, Edson Rodrigues; Gannabathula, Sree Vani; Lavrado, Helena Passeri

doi:10.1007/s00300-008-0574-1

Cited by 8 publications

(6 citation statements)

References 60 publications

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“…In the presence of trophic uoride, the liver of N. rossii raised the levels of arginase, except under the thermo-saline condition of 4-20. As uoride directly inhibits arginases (Rodrigues et al, 2009), increased arginase levels can be o setting this inhibitory e ect. us, the higher levels of arginase would maintain properly the L-arginine metabolism.…”

Section: Discussionmentioning

confidence: 99%

INTERACTIVE EFFECTS OF WARM ACCLIMATION, LOW SALINITY, AND TROPHIC FLUORIDE ON THE LIVER METABOLISM OF THE ANTARCTIC FISH Notothenia rossii

Rodrigues¹,

Feijó-Oliveira²,

Vani³

et al. 2016

INCT-APA Annual Activity Report

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All Antarctic vertebrates are directly or indirectly exposed to high levels of uoride present in the exoskeleton of krill. Absence of uorosis in these organisms indicates high tolerance to this halogen. e present study investigated the e ect of uoride on the hepatic metabolism of N. rossii Antarctic sh. Levels of the enzymes superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GRED) and arginase (ARG) were determined. Specimens were subjected to eight di erent thermo-saline-trophic conditions, involving the interaction between two temperatures (0 o C or 4 o C), two salinities (20 or 35) and two trophic conditions (with or without uoride). Although uoride did not modulate the levels of SOD, CAT and GRED, low salinity reduced hepatic levels of GRED, revealing that this saline condition may be inducing oxidative stress. Fluoride raised arginase levels except in the case of the thermo-saline condition of 4-20. In relation to antioxidant defense, the liver of N. rossii sh was found to be more resistant to toxic e ects of uoride than the liver of non-Antarctic shes.

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Section: Discussionmentioning

confidence: 99%

INTERACTIVE EFFECTS OF WARM ACCLIMATION, LOW SALINITY, AND TROPHIC FLUORIDE ON THE LIVER METABOLISM OF THE ANTARCTIC FISH Notothenia rossii

Rodrigues¹,

Feijó-Oliveira²,

Vani³

et al. 2016

INCT-APA Annual Activity Report

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“…High concentrations of Cd were found in the digestive gland and kidney of mussel Crenomytilus grayanus [35]. In the renal tissue of Antarctic bivalve Laternula elliptica the high levels of Cd and its bio-accumulation can be a probable advantage for environmental adaptation in the Antarctic marine environment [36]. Cd cations were revealed in the hepatopancreas of Mytilus edulis and body wall of echinoderms such as Asterias rubens.…”

Section: Cadmiummentioning

confidence: 99%

Marine Invertebrates as Bioindicators of Heavy Metal Pollution

Chiarelli¹,

Roccheri²

2014

OJMetal

126

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Atmosphere, earth and water compose the environment. The presence of heavy metals in the environment has grown because of their large employment in some industrial and agricultural activities. Although these metals are terrestrial products, they flow into the sea through effluents and sewage or are directly discharged from industries placed on the seawater front. It should be considered that metals concentrations vary widely according to different seawater latitudes and depths and can be strongly influenced by fresh water discharges from heavily polluted rivers. In this review recent studies on heavy metal pollution in marine ecosystems and their organisms will be presented. Metal speciation, bioaccumulation in biota, as well as abiotic and biotic factors affecting their bioavailability will be reviewed. Moreover, the use of bioindicator organisms for the biomonitoring of heavy metal toxicity and their ecological effects will be defined. Many marine invertebrate species fulfill the following criteria: Sensitivity to a wide range of chemicals (especially to heavy metals), cost-effectiveness for repeatable tests, readily interpretable biological consequences of pollution. Among the most important marine invertebrates used as bioindicators, the sea urchin embryo is one of the most suitable, especially to assess metal/heavy metal pollution.

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“…Evolutionary adaptations to the Antarctic environmental conditions can influence the sensitivity of organisms to stress [24][25][26][27]. Most biological processes in the benthos and tidal zone of the polar seas, including growth, reproduction and metabolism are slow, which reduces the ability to detoxify and remove contaminants, making Antarctic organisms especially sensitive to additional environmental stress [28,29].…”

Section: Introductionmentioning

confidence: 99%

Time course of lead induced proteomic changes in gill of the Antarctic limpet Nacella Concinna (Gastropoda: Patellidae)

Piechnik

Höckner

Souza

et al. 2017

Journal of Proteomics

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Proteomic analysis of gill tissue in Antarctic limpets exposed to different concentrations of lead (Pb) over a 168 h time period showed that proteomic changes vary with time. These changes included an increase in the demand of scavenging reactive oxygen species, acid-base balance and a challenge to protein homeostasis in the endoplasmic reticulum early on and subsequently an increase in energy metabolism, cellular signaling, and cytoskeletal modifications. Based on this time course, we hypothesize that the main mode of action of lead is a replacement of metal-cofactors of key enzymes involved in the scavenging of reactive oxygen species and the regulation of acid-base balance.

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Arginine metabolism of the Antarctic Bivalve Laternula elliptica (King & Broderip, 1831): an ecophysiological approach

Cited by 8 publications

References 60 publications

INTERACTIVE EFFECTS OF WARM ACCLIMATION, LOW SALINITY, AND TROPHIC FLUORIDE ON THE LIVER METABOLISM OF THE ANTARCTIC FISH Notothenia rossii

INTERACTIVE EFFECTS OF WARM ACCLIMATION, LOW SALINITY, AND TROPHIC FLUORIDE ON THE LIVER METABOLISM OF THE ANTARCTIC FISH Notothenia rossii

Marine Invertebrates as Bioindicators of Heavy Metal Pollution

Time course of lead induced proteomic changes in gill of the Antarctic limpet Nacella Concinna (Gastropoda: Patellidae)

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