Fish Physiology and Biochemistry

, Volume 13, Issue 5, pp 353–370

Gill epithelial cells kinetics in a freshwater teleost, Oncorhynchus mykiss during adaptation to ion-poor water and hormonal treatments

  • Pierre Laurent
  • Suzanne Dunel-Erb
  • Claudine Chevalier
  • Jacques Lignon
Article

DOI: 10.1007/BF00003415

Cite this article as:
Laurent, P., Dunel-Erb, S., Chevalier, C. et al. Fish Physiol Biochem (1994) 13: 353. doi:10.1007/BF00003415

Abstract

The aim of this work was to determine the kinetics of the dramatic development of the gill chloride cells (CCs) during adaptation of the salmonid Oncorhynchus mykiss to an ion-poor environment.

To monitor cell division, the incorporation in the mitotic cell DNA of bromo-deoxyuridine (BrdUrd) was visualized with a monoclonal antibody. The density of labelled nuclei was used as an index of cellular division (proliferation), concomitantly with morphometry of phenotypic changes monitored with SEM.

In the filament epithelium, a phase of CC differentiation occurred within 12h after the transfer, followed by a delayed phase of cell proliferation (48h). In the lamellar epithelium, the present study demonstrates the absence of cell proliferation after ion-poor water transfer. The conclusion is that proliferation (mitosis) is important in the primary filament whereas differentiation and migration (from the filament) is the main mechanism for the appearance of CCs on the secondary lamellae.

The present study suggests that cortisol promoted differentiation, but not division, of cells. CCs, presumably premature, were stained by anti-cortisol monoclonal antibody indicating the presence of cortisol. No mature CCs were stained.

Growth hormone (oGH, ratGH) increased the rate of cell division both in lamellar and filament epithelium.

Keywords

TEM SEM LM chloride cell cortisol growth hormone morphometry ion poor water 

Copyright information

© Kugler Publications 1994

Authors and Affiliations

  • Pierre Laurent
    • 1
  • Suzanne Dunel-Erb
    • 1
  • Claudine Chevalier
    • 1
  • Jacques Lignon
    • 1
  1. 1.Laboratoire de Morphologie Fonctionnelle des Adaptations Centre d'Ecologie et de Physiologie EnergétiquesC.N.R.S.Strasbourg CedexFrance
  2. 2.ÏttenheimFrance

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