Ca2+-dependent phosphatase and Ca2+-dependent ATPase activities in plasma membranes of eel gill epithelium--III. Stimulation of branchial high-affinity Ca2+-ATPase activity during prolactin-induced hypercalcemia in American eels.
Infusions of ovine prolactin for 10 days induced hypercalcemia in unfed American eels, Anguilla rostrata LeSueur, that tentatively was related to stimulation of branchial Ca2+-uptake mechanisms. Analysis of ATPase activities in the plasma membranes of the branchial epithelium in prolactin treated eels showed a specific stimulation of high-affinity Ca2+-ATPase. The results of this study form further evidence that the high-affinity Ca2+-ATPase activity represents the Ca2+-pump of the branchial epithelium.
D000818:Animals; D000252:Calcium-Transporting ATPases / Q000378:metabolism*; D002148:Calmodulin-Binding Proteins; D002462:Cell Membrane / Q000378:metabolism; D004524:Eels; D004573:Electrolytes / Q000097:blood; D004848:Epithelium / Q000378:metabolism; D005880:Gills / Q000201:enzymology*; D006934:Hypercalcemia / Q000378:metabolism*; D010749:Phosphoprotein Phosphatases / Q000378:metabolism*; D011388:Prolactin / Q000494:pharmacology*
D002148:Calmodulin-Binding Proteins; D004573:Electrolytes; D011388:Prolactin; D010749:Phosphoprotein Phosphatases; D000252:Calcium-Transporting ATPases