UHPLC-MS/MS standardized extract of leaf inhibits CYP2C9 and CYP3A4 activities in hepatic cells of control and streptozotocin-induced diabetic rats.

OBJECTIVES

Del. is a perennial tropical shrub from Asteraceae. The fresh leaf of is consumed as a vegetable due to its medicinal and nutritional properties. The present study focused on the quantification of bioactive compounds, luteolin-7-O-glucoside, luteolin-7-O-glucuronide, and 1,5-O-dicaffeoylquinic acid from aqueous leaf extract of The study also aims to investigate the effects of the aqueous leaf extract of on cytochrome P450 2C9 (CYP2C9), and cytochrome P450 3A4 (CYP3A4) in hepatic cells of control and diabetic rats.

METHODS

The quantification of the bioactive compounds was conducted using ultra-high-performance liquid chromatography multiple reactions monitoring tandem mass spectrometry (UHPLC-MS/MS-MRM) technique. The effect of the extract on CYP2C9 and CYP3A4 activities was determined using a fluorometric screening kit according to the manufacturer's instructions.

RESULTS

The three bioactive compounds were detected and quantified in the aqueous leaf extract. Results showed that the content of luteolin-7-O-glucuronide (47 μg/mg) was the highest followed by luteolin-7-O-glucoside (3.5 μg/mg) and 1,5-O-dicaffeoylquinic acid (1.07 μg/mg). The extract showed an inhibitory effect on CYP3A4 and CYP2C9 enzyme activities in control and diabetic rats.

CONCLUSIONS

The UHPLC-MS/MS-MRM method is sensitive and reliable for the quality control of leaf extract. The inhibitory effect of the extract suggests that concomitant use of leaf preparations with conventional drugs metabolized and eliminated from the body by CYP3A4 and CYP2C9 enzymes may lead to possible interaction.