RT Journal Article
SR Electronic
T1 <em>Artemisia</em> extracts Differ from Artemisinin Effects on Human Hepatic CYP450s 2B6 and 3A4 <em>in vitro</em>
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2022.06.24.497548
DO 10.1101/2022.06.24.497548
A1 Ndeye F. Kane
A1 Bushra H. Kiani
A1 Matthew R. Desrosiers
A1 Melissa J. Towler
A1 Pamela J. Weathers
YR 2022
UL http://biorxiv.org/content/early/2022/06/28/2022.06.24.497548.abstract
AB Ethnopharmacological relevance The Chinese medicinal herb, Artemisia annua L., has been used for &gt;2,000 yr as traditional tea infusions to treat a variety of infectious diseases including malaria, and its use is spreading globally (along with A. afra Jacq. ex Willd.) mainly through grassroots efforts.Aim of the study Artemisinin is more bioavailable delivered from the plant, Artemisia annua L. than the pure drug, but little is known about how delivery via a hot water infusion (tea) alters induction of hepatic CYP2B6 and CYP3A4 that metabolize artemisinin.Materials and Methods HepaRG cells were treated with 10 μM artemisinin or rifampicin (positive control), and teas (10 g/L) of A. annua SAM, and A. afra SEN and MAL with 1.6, 0.05 and 0 mg/gDW artemisinin in the leaves, respectively; qPCR, and Western blots, were used to measure CYP2B6 and CYP3A4 responses. Enzymatic activity of these P450s was measured using liver microsomes and P450-Glo assays.Results All teas inhibited activity of CYP2B6 and CYP3A4. Artemisinin and the high artemisinin-containing tea infusion (SAM) induced CYP2B6 and CYP3A4 transcription, but artemisinin-deficient teas, MAL and SEN, did not. Artemisinin increased CYP2B6 and CYP3A4 protein levels, but none of the three teas did, indicating a post-transcription inhibition by all three teas.Conclusions This study showed that Artemisia teas inhibit activity and artemisinin autoinduction of CYP2B6 and CYP3A4 post transcription, a response likely the effect of other phytochemicals in these teas. Results are important for understanding Artemisia tea posology.Competing Interest StatementThe authors have declared no competing interest.ABarteannuin BACTartemisinin combination therapyARTartemisininCYPcytochrome P450DLAdried leaf ArtemisiaFLVflavonoidsHLMhuman liver microsomeMALArtemisia afra Malawi cultivarPHHprimary human hepatocytesRIFrifampicinSAMArtemisia annua US cultivarSENArtemisia afra Senegal cultivar