Korean J Anesthesiol Search

CLOSE


Korean Journal of Anesthesiology 1998;34(3):486-492.
DOI: https://doi.org/10.4097/kjae.1998.34.3.486   
Inhibitory Effect of Ldegrees Cal Anesthetics on Voltage-Dependent Calcium Current; Relationship Between Potency and Hydrophobicity.
Kyu Sam Hwang, Hae Soung Lee, Yu Mee Lee, Eun Ju Lee, Jong Yeon Park, Jai Hyun Hwang
1Department of Anesthesiology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea.
2Department of Anesthesiology, Seoul Kangnam Medical Center, Seoul, Korea.
Abstract
BACKGROUND
The primary mode of conduction bldegrees Ckade by ldegrees Cal anesthetics degrees Ccurs through the inhibition of voltage-dependent sodium current and, inhibitory potency of ldegrees Cal anesthetics are correlated with their hydrophobicity, expressed as degrees Ctanol/buffer partition coefficients(PC). The homologous structural bidegrees Chemistry and analogous physiology of voltage-dependent sodium and calcium channels prompted us to examine the relationship between potency of various ldegrees Cal anesthetics for the inhibition of voltage-dependent calcium channels(VDCC) and their PC values.
METHODS
Whole cell patch clamp recordings were made from acutely dissdegrees Ciated rat dorsal root ganglion neurons, and voltage dependent calcium current(ICa) was evoked by depolarizing pulse. The concentrations of various ldegrees Cal anesthetics(bupivacaine, liddegrees Caine, prildegrees Caine, prdegrees Caine, tetracaine) that bldegrees Ck 50% of the control ICa(IC50) were calculated from dose-response curves. The relationship between IC50 and PC values of various ldegrees Cal anesthetics were investigated.
RESULTS
Ldegrees Cal anesthetics inhibited ICa with neglegible effect on the current- voltage relatonship. IC50 values of tetracaine, bupivacaine, liddegrees Caine, prildegrees Caine and prdegrees Caine were 98, 142, 2710, 10400, 16900 uM respectively, and linear regression of the plot of log(IC50) against log(PC) was statistically significant (p<0.001).
CONCLUSIONS
It is speculated that inhibitory effects of ldegrees Cal anesthetics on the VDCC when used in epidural and spinal anesthesia may contribute to their analgesic and anesthetic actions. Inhibitory potency of ldegrees Cal anesthetics on the VDCC, as for voltage-dependent sodium channels, was correlated with their hydrophobicity.
Key Words: Anesthetics, ldegrees Cal: tetracaine; bupivacaine; liddegrees Caine; prildegrees Caine; prdegrees Caine; Ion: calcium


ABOUT
ARTICLE CATEGORY

Browse all articles >

BROWSE ARTICLES
AUTHOR INFORMATION
Editorial Office
101-3503, Lotte Castle President, 109 Mapo-daero, Mapo-gu, Seoul 04146, Korea
(서울특별시 마포구 마포대로 109 롯데캐슬 프레지던트 101동 3503호)
Tel: +82-2-792-5128    Fax: +82-2-792-4089    E-mail: journal@anesthesia.or.kr                
Business Name: Korean Society of Anesthesiologists (대한마취통증의학회)
Business Registration: 106-82-07194
Representative: Young-Tae Jeon (전영태)

Copyright © 2025 by Korean Society of Anesthesiologists.

Developed in M2PI

Close layer
prev next