Some effects of @entity2899 alone and combined with XXXX or @entity5161 on neuromuscular transmission.

@entity4094 @entity9856 @entity1508 @entity5161 @entity2899
The mechanisms contributing to the @entity4094 produced by nondepolarizing muscle relaxants and inhaled anesthetics include: 1) receptor blockade, 2) open or closed ion channel block, 3) decreased transmitter release, and 4) receptor desensitization. In this study we investigated the contributions of receptor and ion channel block. We used the two microelectrode voltage clamp to evaluate miniature end-plate currents (MEPCs) for amplitude and time constant of decay (tau) before and after the application of 1) @entity2899 ( @entity9856 ) (10(-7)-10(-6) M) alone, and then 2) the same concentration of @entity9856 plus 0.5% or 1.0% @entity1508 or @entity5161 delivered by passing compressed air through a flow and temperature compensated vaporizer. The electrodes were maintained in the same cell for the entire experiment. @entity9856 alone decreased MEPC amplitude to 91.3% +/- 4.5% and 65.1% +/- 5.6% of control at 10(-7) and 10(-6) M, respectively. MEPC amplitude with 10(-6) M @entity9856 decreased further to 52.4% +/- 7.6% and 37.4% +/- 7.0% of control after the addition of 0.5% and 1.0% @entity1508 , respectively. After the application of @entity9856 10(-7) M tau was 94.7% +/- 3.1% of control and decreased to 73.7% +/- 7.1% of control with 10(-6) M @entity9856 . After the application of @entity9856 10(-6) M the addition of 0.5% and 1% @entity1508 decreased tau to 52.4% +/- 7.6% and 30.0% +/- 5.9% of control. @entity5161 produced similar changes. This study provides evidence that at least some of the augmentation of nondepolarizing relaxants by inhaled anesthetics can be explained by the additive effect of nondepolarizing muscle relaxants and inhaled anesthetics on MEPC amplitude and tau.
