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Activity Development of Selected Detoxication Enzymes during the Ontogenesis of the Zebrafish (Danio rerio)

✍ Scribed by Claudia Wiegand; Stephan Pflugmacher; Axel Oberemm; Christian Steinberg

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 109 KB
Volume: 85
Category: Article
ISSN: 1434-2944
DOI: 10.1002/1522-2632(200008)85:4<413::aid-iroh413>3.0.co;2-3

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✦ Synopsis

Activities of two detoxication enzyme systems, microsomal and soluble glutathione S-transferases (m-/sGST, EC 2.5.1.18), and Se-dependent glutathione peroxidase (GP-X, EC 1.11.1.9) were monitored during zebrafish (Danio rerio) development. Starting with the 2 -4 cell stage of ontogenesis successively up to adult fish, the presence of these detoxication enzymes could be demonstrated. Activities increased slowly during development and showed elevations corresponding to increased stress conditions. Plain increase occured after hatching, possibly caused by the change of the surrounding micromilieu. The juveniles showed highest activities, certainly provoked by new substances as from the food. Enzyme activities of adults revealed moderate levels probably due to a dilution of highly concentrated detoxication activities in the ready developed organs, especially the liver, in the whole body homogenate.

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