Induction of propranolol metabolism by the azo dye sudan III in rats

Ryozo Ishida, Sakae Obara, Yasuhiro Masubuchi, Shizuo Narimatsu, Shoichi Fujita, Tokuji Suzuki

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Abstract

Effects of the azo dye sudan III, an inducer of cytochrome P450 isozymes belonging to the CYP1A subfamily, on propranolol (PL) in vitro and in vivo metabolism were investigated in rats. The kinetic parameters of the activity for each metabolic pathway were determined in liver microsomes from control and sudan III-treated rats. Sudan III pretreatment increased extensively PL 4-hydroxylase, 5-hydroxylase and N-desisopropylase activities at high but not at low PL concentrations. On the other hand, kinetic parameters of 7-hydroxylase activity were not affected by sudan III pretreatment. Sudan III pretreatment decreased blood concentrations of PL after intraportal infusion of PL at high doses (12.5 and 20 mg/kg), but not at a low dose (5 mg/kg). These observations were consistent with data obtained from the in intro studies showing that sudan III pretreatment induced low-affinity but not high-affinity cytochrome P450 isozymes involved in PL metabolism in rat liver microsomes.

Original languageEnglish
Pages (from-to)2489-2492
Number of pages4
JournalBiochemical Pharmacology
Volume43
Issue number11
DOIs
Publication statusPublished - Jun 9 1992
Externally publishedYes

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sudan III
Azo Compounds
Metabolism
Propranolol
Rats
Mixed Function Oxygenases
Liver Microsomes
Kinetic parameters
Liver
Cytochrome P-450 Enzyme System
Isoenzymes
Metabolic Networks and Pathways
Blood

ASJC Scopus subject areas

  • Pharmacology

Cite this

Ishida, R., Obara, S., Masubuchi, Y., Narimatsu, S., Fujita, S., & Suzuki, T. (1992). Induction of propranolol metabolism by the azo dye sudan III in rats. Biochemical Pharmacology, 43(11), 2489-2492. https://doi.org/10.1016/0006-2952(92)90332-D

Induction of propranolol metabolism by the azo dye sudan III in rats. / Ishida, Ryozo; Obara, Sakae; Masubuchi, Yasuhiro; Narimatsu, Shizuo; Fujita, Shoichi; Suzuki, Tokuji.

In: Biochemical Pharmacology, Vol. 43, No. 11, 09.06.1992, p. 2489-2492.

Research output: Contribution to journalArticle

Ishida, R, Obara, S, Masubuchi, Y, Narimatsu, S, Fujita, S & Suzuki, T 1992, 'Induction of propranolol metabolism by the azo dye sudan III in rats', Biochemical Pharmacology, vol. 43, no. 11, pp. 2489-2492. https://doi.org/10.1016/0006-2952(92)90332-D
Ishida R, Obara S, Masubuchi Y, Narimatsu S, Fujita S, Suzuki T. Induction of propranolol metabolism by the azo dye sudan III in rats. Biochemical Pharmacology. 1992 Jun 9;43(11):2489-2492. https://doi.org/10.1016/0006-2952(92)90332-D
Ishida, Ryozo ; Obara, Sakae ; Masubuchi, Yasuhiro ; Narimatsu, Shizuo ; Fujita, Shoichi ; Suzuki, Tokuji. / Induction of propranolol metabolism by the azo dye sudan III in rats. In: Biochemical Pharmacology. 1992 ; Vol. 43, No. 11. pp. 2489-2492.
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