Asset Details
Do you wish to reserve the book?
Green Tea Catechins Decrease Solubility of Raloxifene In Vitro and Its Systemic Exposure in Mice
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Green Tea Catechins Decrease Solubility of Raloxifene In Vitro and Its Systemic Exposure in Mice
Do you wish to request the book?
Green Tea Catechins Decrease Solubility of Raloxifene In Vitro and Its Systemic Exposure in Mice
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Green Tea Catechins Decrease Solubility of Raloxifene In Vitro and Its Systemic Exposure in Mice
2024
Overview
PurposeGreen tea is a widely consumed beverage. A recent clinical study reported green tea decreased systemic exposure of raloxifene and its glucuronide metabolites by 34–43%. However, the underlying mechanism(s) remains unknown. This study investigated a change in raloxifene’s solubility as the responsible mechanism.MethodsThe effects of green tea extract, (–)-epigallocatechin gallate (EGCG), and (–)-epigallocatechin (EGC) on raloxifene’s solubility were assessed in fasted state simulated intestinal fluids (FaSSIF) and fed state simulated intestinal fluids (FeSSIF). EGCG and EGC represent green tea’s main bioactive constituents, flavan-3-gallate and flavan-3-ol catechins respectively, and the tested concentrations (mM) match the µg/mg of each compound in the extract. Our mouse study (n = 5/time point) evaluated the effect of green tea extract and EGCG on the systemic exposure of raloxifene.ResultsEGCG (1 mM) and EGC (1.27 mM) decreased raloxifene’s solubility in FaSSIF by 78% and 13%, respectively. Micelle size in FaSSIF increased with increasing EGCG concentrations (> 1000% at 1 mM), whereas EGC (1.27 mM) did not change micelle size. We observed 3.4-fold higher raloxifene solubility in FeSSIF compared to FaSSIF, and neither green tea extract nor EGCG significantly affected raloxifene solubility or micelle size in FeSSIF. The mice study showed that green tea extract significantly decreased raloxifene Cmax by 44%, whereas EGCG had no effect. Green tea extract and EGCG did not affect the AUC0-24 h of raloxifene or the metabolite-to-parent AUC ratio.ConclusionsThis study demonstrated flavan-3-gallate catechins may decrease solubility of poorly water-soluble drugs such as raloxifene, particularly in the fasted state.
Publisher
Springer Nature B.V
Subject
