The Ewha Medical Journal
Ewha Womans University School of Medicine
Original Article

Effect of Nifedipine on Induction of Cytochrome P-450 1A1 and 2B1 in Spontaneously Hypertensive Rate

Young-Sook Hong, Hyung-Lae Kim, Hae-Young Park, Young-Sook Pae*, Sang-Shin Park**

Copyright ⓒ 1995. Ewha Womans University School of Medicine. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Published Online: Jul 24, 2015


Cytochrome P-450(CYP) enzymes are important in catalyzing the hiotransffrmation on manyendogeneous compounds and xenobiotics, including drugs and carcinogens. In the presentstudy, effect of nifedipine a voltage dependent calcium channel blocker on the induction ofCYP1A1 and 2B1 was investigated. Change of CYP1A1 and 2B1 activities were measuredby using specific enzyme activities and Western blot analysis. CYP1A1, as quantified by ethoxyresorufin-0-deethylase activity and Western blot with monoclonal antibody 1-7-1, increasedin liver microsome of nifedipine-treated spontaneous hypertensive rat(SHR. 30mg/kg.b.w, twicea day for 3days) but not in kidney microsome. CYP2B1, as quantified by benzyloxyresorufin-O-dealkylase activity and Western blot wit]1 monoclonal antibody 2-66-3, markedly increasedin liver microsome of nifedipine-treated SHR but slightly in kidney microsome. The resultsdemonstrate that nifedipine is a potent inducer of CYP2B1 in SHR.