Christiansen T ; Kinnberg K ; Bjerregaard P ; Korsgaard B ;

Marine Environmental Research vol. 50 (1-5)   pp. 213-6, 2000

Institute of Biology, University of Southern Denmark, Odense University, Campusvej 55, DK-5230 Odense, Denmark. tinac@biology.ou.dk

Estrogenic chemicals are known to have marked effects on the reproductive system of male fish. Finding useful markers of reproductive effects are therefore of great importance and interest. gamma-Glutamyl transpeptidase (gamma-GTP) is a possible marker of Sertoli cells in testes of fish. In the present study we have examined the relationship between the activity of gamma-GTP and the histological structure of the Sertoli cells in testes of five fish species (guppy, Poecilia reticulata; platyfish, Xiphophorus maculatus; eelpout, Zoarces viviparus; rainbow trout, Oncorhynchus mykiss; flounder, Platichthys flesus). In general we found that the more distinct the Sertoli cells the higher the activity of gamma-GTP.

Animals ;  Biological Markers ;  Cyprinodontiformes ;  Estrogens ;  Toxicity ;  Fishes ;  Metabolism ;  Flounder ;  Male ;  Oncorhynchus mykiss ;  Perciformes ;  Poecilia ;  Sertoli Cells ;  Enzymology ;  Ultrastructure ;  Testis ;  Gamma-Glutamyltransferase ;