Stimulation of the sodium transport across the frog skin by three N-terminally extended arginine-vasopressins
Language English Country Slovakia Media print
Document type Journal Article
PubMed
2272488
Knihovny.cz E-resources
- MeSH
- Arginine Vasopressin analogs & derivatives pharmacology MeSH
- Electrophysiology MeSH
- Epithelium drug effects physiology MeSH
- Skin Physiological Phenomena * MeSH
- Skin drug effects MeSH
- Membrane Potentials drug effects MeSH
- Rana temporaria MeSH
- Sodium metabolism MeSH
- In Vitro Techniques MeSH
- Animals MeSH
- Check Tag
- Male MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- Arginine Vasopressin MeSH
- Sodium MeSH
The standard Ussing method was used to electrophysiologically characterize the effects of three analogs of arginine-vasopressin (AVP) on the frog skin, a model Na-transporting epithelium. The analogs tested were N-terminally extended Arg8-vasopressins: Ala-AVP, Ser-Ala-AVP and Thr-Ser-Ala-AVP; synthetic Arg8-AVP was used as the reference agent. The vasopressins were applied to the basolateral side of the frog skin in concentrations ranging between 10(-8) to 10(-5) mol.l-1. All the three analogs increased both the short-circuit current (Isc) and the open-circuit transepithelial potential (Voc), and decreased the transepithelial d.c. resistance (Rt) similarly as did synthetic Arg8-AVP. The results show that N-terminal extension of the Arg8-AVP did not alter the natriferic properties of AVP.
