Optimal concentration of cellular free calcium for AVP-induced cAMP in collecting tubules
نویسندگان
چکیده
منابع مشابه
Effects of parathyroid hormone on cytosolic free calcium concentration in individual rabbit connecting tubules.
PTH stimulates active Ca reabsorption in isolated perfused rabbit kidney connecting tubules (CNTs). The existence of PTH-sensitive adenylate cyclase and the reproduction of increased epithelial Ca transport by dibutyryl-cAMP suggest that cAMP is the mediator. Accordingly, we studied the effects of PTH and 8-bromoadenosine 3',5'-cAMP (8-Br-cAMP) on cytosolic free calcium concentration [( Ca2+]i)...
متن کاملEffects of Parathyroid Hormone on Cytosolic Free Calcium Concentration in Individual Rabbit Connecting Tubules
PTH stimulates active Ca reabsorption in isolated perfused rabbit kidney connecting tubules (CNTs). The existence of PTH-sensitive adenylate cyclase and the reproduction of increased epithelial Ca transport by dibutyryl-cAMP suggest that cAMP is the mediator. Accordingly, we studied the effects of PTH and 8-bromoadenosine 3',5'-cAMP (8-Br-cAMP) on cytosolic free calcium concentration (ICa2"j;) ...
متن کاملOsmosis in Cortical Collecting Tubules
This paper reports a theoretical analysis of osmotic transients and an experimental evaluation both of rapid time resolution of lumen to bath osmosis and of bidirectional steady-state osmosis in isolated rabbit cortical collecting tubules exposed to antidiuretic hormone (ADH). For the case of a membrane in series with unstirred layers, there may be considerable differences between initial and s...
متن کاملVasopressin V1 receptors on the principal cells of the rabbit cortical collecting tubule. Stimulation of cytosolic free calcium and inositol phosphate production via coupling to a pertussis toxin substrate.
The effects of arginine vasopressin (AVP) on the cytosolic free calcium concentration ([Ca2+]f) were examined in freshly immunodissected rabbit cortical collecting tubule cells using fluorescent Ca2+ indicators fura-2 and indo-1. The addition of AVP to a cell suspension resulted in a rapid and transient increase in the [Ca2+]f. The 1-deamino-8-D-AVP (dDVP), a V2 receptor agonist of AVP that sti...
متن کامل[Evidence for a role of calmodulin in cellular cAMP production in response to vasopressin, prostaglandin E2 and forskolin in cultured rat renal papillary collecting tubule cells].
In the present study, the role of calmodulin in the cellular action of arginine vasopressin (AVP), prostaglandin (PG) E2 and forskolin on adenosine-3', 5'-monophosphate (cAMP) production was examined in cultured rat renal papillary collecting tubule cells. In the presence of the phosphodiesterase inhibitor, submaximal concentrations of 10(-9) M AVP, 2 X 10(-8) M PGE2 and 2.4 X 10(-7) M forskoli...
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ژورنال
عنوان ژورنال: Kidney International
سال: 1990
ISSN: 0085-2538
DOI: 10.1038/ki.1990.86