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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Comparison of the effects of xenon and halothane on voltage-dependent Ca(2+) fluxes in rabbit T-tubule membranes.

The effects of xenon and halothane on depolarization-induced (45)Ca(2+) fluxes mediated by voltage-dependent Ca(2+) channels were investigated in transverse tubule membrane vesicles from rabbit skeletal muscle. Halothane, in the concentration range of 0.5-2 mM, caused a significant inhibition of (45)Ca(2+) fluxes. Xenon tested in the range of 60%-100% did not affect the (45)Ca(2+) fluxes. Radioligand binding studies indicated that xenon and halothane have different effects on the specific binding of [(3)H]Isradipine to transverse tubule membranes. Halothane caused a significant inhibition on the specific binding of [(3)H]Isradipine. In controls and in presence of 0.5 mM halothane, B(max) values were 26.9 pmole/mg and 15.1 pmole/mg, and K(D) values were 238 pM and 247 pM, respectively. On the other hand, there was no effect of xenon (60%-100%) on the characteristics of [(3)H]Isradipine binding. In conclusion, results indicate that xenon and halothane differ in their effects on the function of voltage-dependent Ca(2+) channels and on the specific binding of [(3)H]Isradipine in skeletal muscle membranes.[1]

References

  1. Comparison of the effects of xenon and halothane on voltage-dependent Ca(2+) fluxes in rabbit T-tubule membranes. Oz, M., Dinc, M., Tchugunova, Y., Dunn, S.M. Naunyn Schmiedebergs Arch. Pharmacol. (2002) [Pubmed]
 
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