Effect of propofol on high- voltage-activated calcium currents in rat hippocampal neurons / 中华麻醉学杂志
Chinese Journal of Anesthesiology
; (12): 654-657, 2010.
Artigo
em Chinês
| WPRIM (Pacífico Ocidental)
| ID: wpr-387043
Biblioteca responsável:
WPRO
ABSTRACT
Objective To investigate the effect of propofol on the high-voltage-activated calcium currents [ICa(HVA)] in rat hippocampal neurons. Methods Hippocampal neurons were prepared from Wistar rats and cultured. ICa(HVA) was recorded using whole-cell patch clamp technique. Different concentrations of propofol were added to the culture. The effect of propofol on ICa(HVA) Was evaluated. Results ICa(HVA) was inhibited by propofol in 300 μmol/L reduced peak ICa(HVA) by (24±6)%, (33 ±5) %, (36±7)% and(38±3)% respectively with a mean IC50 of 3.8 μmol/L and Hill coefficient of 0.35. Vmax was shifted from (4.0± 2.0) mV to (3.8 ± 1.6) mV. The V1/2 of inactivation curve was shifted from (- 32 ± 5) mV to (- 35 ± 4) mV and the slope factor was 31 ± 5 and 35 ± 6 before and after administration respectively. Conclusion Propofol produces significant inhibition of calcium currents in the central neurons which may partly explain the action of propofol on central nervous system.
Texto completo:
Disponível
Base de dados:
WPRIM (Pacífico Ocidental)
Idioma:
Chinês
Revista:
Chinese Journal of Anesthesiology
Ano de publicação:
2010
Tipo de documento:
Artigo