Effect of microcystin on ion regulation and antioxidant system in gills of the estuarine crab Chasmagnathus granulatus (Decapoda, Grapsidae)

Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP
T M VinagreJ M Monserrat

Abstract

The objective of this work was to evaluate mechanisms of microcystin toxicity on crustacean species. Adult male crabs of Chasmagnathus granulatus (13.97+/-0.35 g) acclimated to low salinity (2 per thousand ) were injected with saline (control) or Microcystis aeruginosa aqueous extract (39.2 microg/l) at 24 h intervals for 48 h. After the exposure period, the anterior and posterior gills were dissected, measuring Na(+),K(+)-ATPase and glutathione-S-transferase (GST) activity. Total oxyradical scavenging capacity (TOSC) and lipid peroxides (LPO) content were also determined. Na(+),K(+)-ATPase activity in anterior gills was significantly lower in crabs injected with toxin than in control crabs, while no significant difference in the enzyme activity was detected in posterior gills. Both sodium and chloride concentration in the hemolymph were not affected by toxin exposure. Significant changes in GST activity were detected in posterior gills, with higher values being observed in the toxin-injected crabs. Crabs exposed to microcystin also showed a significant increase in the TOSC value against peroxyl radicals, for both anterior and posterior gills. Lipid peroxides level did not change in both gill types after exposure to the toxin. ...Continue Reading

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Citations

Aug 21, 2013·Aquatic Toxicology·Shruti Pavagadhi, Rajasekhar Balasubramanian
Apr 6, 1999·Comparative Biochemistry and Physiology. Part C, Pharmacology, Toxicology & Endocrinology·A M VitaleE M Rodriguez
Sep 11, 2003·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·G L L PinhoJ M Monserrat
Jan 2, 2009·Journal of Toxicology and Environmental Health. Part B, Critical Reviews·José C Martins, Vítor M Vasconcelos
Dec 20, 2011·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Malorie GélinasFrançois Gagné
Aug 27, 2009·Toxicon : Official Journal of the International Society on Toxinology·José C MartinsVítor Vasconcelos
Oct 19, 2006·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Lin WangBo-Ping Han
Aug 8, 2006·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·M Carolina RomeroGustavo A Lovrich
Feb 16, 2011·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·S LavaríasM Ansaldo
Jul 31, 2007·Environmental Research·F X Valdez DomingosC A Oliveira Ribeiro
Oct 19, 2006·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·José M MonserratAdalto Bianchini

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