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Effects of rotenone and other mitochondrial complex I inhibitors on the brine shrimp Artemia

Acta Biologica Hungarica, ISSN: 0236-5383, Vol: 61, Issue: 4, Page: 401-410
2010
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Article Description

Brine shrimp (Artemia) nauplii was used to asses the toxicity of rotenone, MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine), MPP (1-methyl-4-phenylpyridinium) and the effect of L-DOPA co-treatment with rotenone. Rotenone had a dose dependent effect on mortality (LC: 0.37 ± 0.04 μM mean ± SE, n = 24), while MPTP and MPP proved to be toxic in millimolar range (LC: 0.21 ± 0.09 mM and 0.20 ± 0.08 mM, respectively, n = 4). L-DOPA (50-200 μM) co-treatment increased the survival of the rotenone-treated animals (LC: 0.51 ± 0.23 μM, 1.03 ± 0.66 μM, and 0.76 ± 0.52 μM, respectively). In the whole body tissue homogenates of Artemia, sublethal (up to 0.3 μM) concentrations of rotenone increased the glutathione S-transferase (GST) activity by up to 50 about percent (LC : 53.3 ± 6.8 nM/min/mg protein, against 34.7 ± 3.6 nM/min/mg protein, n = 4). Nauplii treated in 100 mM L-DOPA and rotenone together showed further increase of GST activity all across the range of rotenone concentrations. These results on Artemia nauplii show similarities with other animal models, when complex I inhibitors were tested. Biochemical measurements suggest a protective role of L-DOPA by increasing the GST activity as part of the intracellular defences during toxin-evoked oxidative stress. © 2010 Akadémiai Kiadó, Budapest.

Bibliographic Details

Vehovszky, Agnes; Szabó, Henriette; Acs, A; Gyori, J; Farkas, Anna

Springer Science and Business Media LLC

Biochemistry, Genetics and Molecular Biology; Environmental Science; Neuroscience

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