Effects of prolactin on ? and ? chloride cells in the gill epithelium of the saltwater adapted tilapia ?Oreochromis niloticus?

Autor: M. Pisam, Françoise Rentier-Delrue, Patrick Prunet, B. Auperin, Joseph Martial, A. Rambourg
Přispěvatelé: Département de biologie cellulaire et moléculaire, Centre de Recherche Pierre Fabre (Centre de R&D Pierre Fabre), PIERRE FABRE-PIERRE FABRE, Station de physiologie des poissons, Institut National de la Recherche Agronomique (INRA), Université de Liège
Rok vydání: 1993
Předmět:
Gills
Gill
tilapia
[SDV]Life Sciences [q-bio]
Fresh Water
adaptation
Chloride
Epithelium
poisson
0303 health sciences
biology
transfert d'ion
Tilapia
04 agricultural and veterinary sciences
Adaptation
Physiological
Agricultural and Biological Sciences (miscellaneous)
6. Clean water
osmorégulation
Oreochromis
medicine.anatomical_structure
Anatomy
medicine.drug
medicine.medical_specialty
food.ingredient
Alpha (ethology)
eau salée
03 medical and health sciences
fish
prolactin
food
Internal medicine
chlore
medicine
Animals
Seawater
14. Life underwater
salinité
030304 developmental biology
oreochromis niloticus
cellule à chlorure
Epithelial Cells
branchie
biology.organism_classification
Molecular biology
Prolactin
Microscopy
Electron
Endocrinology
040102 fisheries
Ultrastructure
0401 agriculture
forestry
and fisheries
cichlidae
prolactine
Zdroj: Anatomical Record (235), 275-284. (1993)
Anatomical Record
Anatomical Record, Wiley, 1993, 235, pp.275-284. ⟨10.1002/ar.1092350211⟩
ISSN: 1097-0185
0003-276X
DOI: 10.1002/ar.1092350211
Popis: International audience; Tilapia (Oreochromis niloticus), 21 g average body weight, were divided into two groups. A group was maintained in fresh water, whereas another group was adapted for 2 weeks to 20% salt water. Among the latter, fishes were injected every 2 days for a week with tilapia prolactin (ti-PRL I). Gills were prepared for electron microscopy in order to determine the types and surface areas of chloride cells in each experimental condition. Two types of chloride cells, the alpha and beta cells were easily distinguished on the basis of their location and ultrastructural features in the gills of freshwater fishes, while only one type of cell, the saltwater alpha cells presumably derived from the transformation of the freshwater alpha cells, were encountered in saltwater adapted animals. After PRL injection of saltwater adapted fishes, small chloride cells, which displayed ultrastructural features similar to those of beta cells in freshwater tilapia, reappeared in interlamellar regions of the gills. In the same experimental conditions, the voluminous saltwater alpha cells showed a tendency to resume ultrastructural features more characteristic of the freshwater alpha cells from which they were derived. These observations tend to indicate that prolactin behaves as a "freshwater adapting hormone" and that beta cells are specifically involved in fish adaptation to freshwater living conditions.
Databáze: OpenAIRE
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