title: Effects of iron on rainbow trout gill cells in primary culture.
abstract: This study investigated the effects of iron in the form of iron sulphate (FeSO(4)·7H(2)O), over the range 0.01-1 mM on rainbow trout primary gill cells cultured on semi-permeable membranes. The endpoints measured were cell proliferation, mucous cell numbers, area of mucus in mucous cells, ultrastructural analysis and transepithelial resistance. Regardless of the concentration, FeSO(4) did not modify the apical surface of pavement cells (microridge) and mucous cells. However, at 1 mM, this metal reduced cell numbers, by inhibiting cell proliferation and causing cell death, and induced a decrease in transepithelial resistance. It is interesting to note that cell numbers were also reduced in the presence of 0.5 mM iron salt, although this reduction did not modify transepithelial resistance. FeSO(4) reduced mucous cell number but did not change mucus area in mucous cells suggesting that this metal could induce a discharge of mucous cells, but mucus secretion would be total and not partial. In conclusion, our in vitro model has allowed to study some toxic effect but also resistance of gill epithelium in presence of iron.
authors.affiliation: INRA, UR1037 SCRIBE, IFR140, Biogenouest, 35000 Rennes, France. Isabelle.Leguen@rennes.inra.fr
authors.forename: Isabelle
authors.initials: I
authors.lastname: Leguen
authors.forename: Sandrine
authors.initials: S
authors.lastname: Peron
authors.forename: Patrick
authors.initials: P
authors.lastname: Prunet
mesh_terms: D000818:Animals; D002452:Cell Count; D002467:Cell Nucleus / Q000187:drug effects / Q000378:metabolism; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D017097:Electric Impedance; D004848:Epithelium / Q000187:drug effects; D005880:Gills / Q000166:cytology* / Q000187:drug effects* / Q000648:ultrastructure; D007501:Iron / Q000494:pharmacology*; D009093:Mucus / Q000166:cytology / Q000187:drug effects; D017686:Oncorhynchus mykiss / Q000378:metabolism*
chemical_list: D007501:Iron