Toxicity of As in Crassostrea virginica (Gmelin, 1791) from the Northern Gulf of Mexico at the presence of Zn and its antioxidant defense mechanisms

Alexander, Turquoise C.; Han, Fengxiang X.; Arslan, Zikri; Tchounwou, Paul B.

doi:10.1016/j.ecoenv.2019.02.009

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Toxicity of As in Crassostrea virginica (Gmelin, 1791) from the Northern Gulf of Mexico at the presence of Zn and its antioxidant defense mechanisms

2019
By Alexander, Turquoise C. ; Han, Fengxiang X. ; Arslan, Zikri ; ...
Source: Ecotoxicology and Environmental Safety 172 (2019) 514–522

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Journal Title:

Ecotoxicology and Environmental Safety
Personal Author:

Alexander, Turquoise C. ; Han, Fengxiang X. ; Arslan, Zikri ; Tchounwou, Paul B.

Alexander, Turquoise C. ; Han, Fengxiang X. ; Arslan, Zikri ; Tchounwou, Paul B. Less -
NOAA Program & Office:

ECSC (Environmental Cooperative Science Center at Florida A&M University)
Description:

Reactive oxygen species (ROS) such as the free radicals (e.g. hydroxyl, nitric acid, superoxide) cause damage to lipids, proteins and DNA. Increased production of ROS occurs from pollution. Process of removal or neutralization of ROS is achieved through antioxidants enzyme defense systems and provide homeostasis within biological systems. Aerobic organisms have complex antioxidant systems using enzymatic and non-enzymatic antioxidants to prevent overproduction of ROS. This study examined the toxic effects of arsenic and zinc on Eastern oysters, their interaction and resulting enzymatic responses. Cellular damage as indicated with lipid peroxidation and antioxidant defensive enzyme activities (superoxide dismutase, SOD; glutathione peroxidase, GPX and catalase, CAT) were measured in the hepatopancreas of Eastern oysters exposed to single and combined treatments of arsenic and zinc for 30 days. The results showed either arsenic or zinc exposure significantly increased the lipid peroxidation and triggered antioxidant defenses. Activities of antioxidant enzymes (SOD, GPX and CAT) were markedly elevated upon expose of As or Zn. However, at the presence of Zn, As toxicity expressed as lipid oxidation significantly decreased as well as accordingly decreased activities of antioxidant enzymes. This revealed that the presence of Zn showed a significantly antagonistic effect on arsenic toxicity in Eastern oysters from Northern Gulf of Mexico.
Keywords:

[+]

Antioxidants Arsenic Enzymes Oysters Zinc Antagonistic effect
Source:

Ecotoxicology and Environmental Safety 172 (2019) 514–522
DOI:

https://doi.org/10.1016/j.ecoenv.2019.02.009
Document Type:

Journal Article
Funding:

Grant no. NA16SEC4810009 ; Grant no. NA11SEC4810001-003499

Grant no. NA16SEC4810009 ; Grant no. NA11SEC4810001-003499 Less -
Place as Subject:

Mexico, Gulf of
Rights Information:

Accepted Manuscript
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Submitted
Main Document Checksum:

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urn:sha256:f361caec13199b80891dcff2f9581905d4cb989ce14f377284cd17d123879d3a
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https://repository.library.noaa.gov/view/noaa/45465/noaa_45465_DS1.pdf
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Toxicity of As in Crassostrea virginica (Gmelin, 1791) from the Northern Gulf of Mexico at the presence of Zn and its antioxidant defense mechanisms

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