10. The effects of Andrographis paniculata (Burm
.f.) Nees extract and diterpenoids on the CYP450 isoforms' activities, a review of possible herb-drug interaction
risks
By Tan, Mei Lan; Lim, Lin Ee
From Drug and Chemical Toxicology (1977) (2015), 38(3), 241-253. Language: English, Database: CAPLUS,
DOI:10.3109/01480545.2014.947504
A review. Andrographis paniculata (Burm .f.) Nees is a popular medicinal plant and its components are used in various
traditional product prepns. However, its herb-drug interactions risks remain unclear. This review specifically discusses
the various published studies carried out to evaluate the effects of Andrographis paniculata (Burm .f.) Nees plant exts.
and diterpenoids on the CYP450 metabolic enzyme and if the plant components pose a possible herb-drug interaction
risk. Unfortunately, the current data are insufficient to indicate if the exts. or diterpenoids can be labeled as in vitro
CYP1A2, CYP2C9 or CYP3A4 inhibitors. A complete CYP inhibition assay utilizing human liver microsomes and the
derivation of relevant parameters to predict herb-drug interaction risks may be necessary for these isoforms. However,
based on the current studies, none of the exts. and diterpenoids exhibited CYP450 induction activity in human
hepatocytes or human-derived cell lines. It is crucial that a well-defined exptl. design is needed to make a meaningful
herb-drug interaction prediction.