alexa Effect of somatolactin and related hormones on phosphate transport by flounder renal tubule primary cultures.
Agri and Aquaculture

Agri and Aquaculture

Fisheries and Aquaculture Journal

Author(s): Lu M, Swanson P, Renfro JL

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Abstract Winter flounder renal proximal tubule primary monolayer cultures mounted in Ussing chambers were used to determine the effect of salmon somatolactin (sSL) on transepithelial Pi and Ca2+ transport. sSL stimulated Pi reabsorption in a dose-dependent manner at physiological levels of the hormone (12.5 ng/ml). Net Pi transport was significantly altered by sSL (200 ng/ml) within 2 h after the initial exposure. Ca2+ fluxes were unchanged by the addition of 200 ng/ml sSL. The sSL-induced Pi reabsorption was abolished by 10 microM H-89, a highly specific protein kinase A inhibitor. Moreover the production and release of adenosine 3',5'-cyclic monophosphate were significantly increased after 1 and 2 h of exposure to sSL. The data indicate that sSL directly stimulates net renal Pi reabsorption by an adenosine 3',5'-cyclic monophosphate-dependent pathway. In addition to sSL, flounder SL and rat prolactin greatly, and salmon growth hormone (2.3 micrograms/ml) slightly, increased net Pi reabsorptive flux, whereas salmon prolactin had no effect.
This article was published in Am J Physiol and referenced in Fisheries and Aquaculture Journal

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