In Vitro Investigation on the Effect of Dendrobine on the Activity of Cytochrome P450 Enzymes

Wang Z, Zhou K, Liang Z, Zhang H, Song Y, Yang X, Xiang D, Xie Q · Planta Medica · 2022 May 06

Objective

To investigate the effects and inhibition mechanisms of dendrobine on cytochrome P450 enzyme activities in pooled human liver microsomes.

Conclusions

Dendrobine significantly inhibited cytochrome P450 3A4, 2C19, and 2D6 activities in vitro, indicating its potential to cause drug-drug interactions with drugs metabolized by cytochrome P450 3A4, 2C9, and 2D6.

Critical Appraisal

Published research can offer valuable insights, but a paper’s conclusions may go beyond what its results support. Critical appraisal examines the methods, findings and limitations to clarify what can reasonably be concluded—and what remains uncertain.

This article has not yet been critically appraised by the Research Hub.

Learn more about Critical Appraisal

Insights

Dendrobine may alter medicine metabolism by inhibiting key liver enzymes, including one through time-dependent noncompetitive inhibition.

Researchers tested dendrobine across a range of concentrations in pooled human liver microsomes to assess its effects on cytochrome P450 enzyme activity. Enzyme-specific inhibitors served as positive controls, untreated samples served as negative controls, and kinetic plotting was used to determine the type and strength of inhibition. Dendrobine inhibited cytochrome P450 3A4, 2C19, and 2D6, indicating potential interactions with medicines processed by these enzymes. Its inhibition of cytochrome P450 3A4 was noncompetitive and increased with exposure time, whereas inhibition of cytochrome P450 2C19 and 2D6 was competitive and did not show time-dependent effects.