Click here to close Hello! We notice that you are using Internet Explorer, which is not supported by Xenbase and may cause the site to display incorrectly. We suggest using a current version of Chrome, FireFox, or Safari.
XB-ART-20580
FEBS Lett 1994 Nov 07;3542:177-82.
Show Gene links Show Anatomy links

PVP-containing solutions for analysis of divalent cation-dependent NMDA responses in Xenopus oocytes.

Raditsch M , Witzemann V .


???displayArticle.abstract???
The electrophysiological analysis of Ca(2+)-conducting ion channels in Xenopus oocytes is difficult due to secondary intracellular effects induced by Ca2+. In the presence of polyvinylpyrrolidone (PVP) membrane currents can be recorded in nominally divalent cation-free solutions. The Ca(2+)-permeable recombinant NMDA receptors of the NR1/NR2A subtype were used as assay system and the results show that PVP has no effect on NMDA receptor-induced currents. Ca2+ and Ba2+ depress NMDA-induced currents at submillimolar concentrations probably by interfering with the Na+/K+ flux. This block is fully reversible as also observed for Mg2+ but shows in contrast no pronounced voltage dependence. PVP-containing solutions may be useful for the analysis of divalent cation-dependent ion channels.

???displayArticle.pubmedLink??? 7525352
???displayArticle.link??? FEBS Lett