pp. 951-960
S&M2865 Research Paper of Special Issue https://doi.org/10.18494/SAM3598 Published: March 3, 2022 A Measurement Method for Cytochrome P450 3A4 (CYP3A4)-mediated Oxidation of Cholesterol in Lipid Membranes [PDF] Atsushi Shoji, Haruka Miki, Mikiko Kikkawa, Miyu Yamamoto, Yukiko Moriiwa, Kazuhiro Morioka, and Akio Yanagida (Received August 24, 2021; Accepted February 8, 2022) Keywords: streptolysin O, CYP3A4, liposome, erythromycin
We have developed a measurement method for the cytochrome P450 3A4 (CYP3A4)-mediated oxidation of cholesterol in lipid membranes. This method is based on the sterol-structural selectivity for the nanopore formation of streptolysin O (SLO) in a lipid membrane. A decrease in the fraction of 4β-hydroxycholesterol in lipid membranes decreased the nanopore forming ability of SLO. The incubation of the liposomes consisting of l-α-phosphatidylcholine (PC), l-α-phosphatidylethanolamine (PE), and cholesterol (0.98:0.02:0.75, mol/mol) with CYP3A4 decreased the nanopore forming ability of SLO, indicating the conversion of cholesterol to 4β-hydroxycholesterol. The change in nanopore forming ability did not occur in the presence of erythromycin, which is an inhibitor of CYP3A4.
Corresponding author: Atsushi ShojiThis work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Atsushi Shoji, Haruka Miki, Mikiko Kikkawa, Miyu Yamamoto, Yukiko Moriiwa, Kazuhiro Morioka, and Akio Yanagida, A Measurement Method for Cytochrome P450 3A4 (CYP3A4)-mediated Oxidation of Cholesterol in Lipid Membranes, Sens. Mater., Vol. 34, No. 3, 2022, p. 951-960. |