MK-886 pretreatment increases intracellular hypericin level in HT-29 and MCF-7 cells.
MK-886 modulates ABC transporters expression and efflux activity.
Along with BCRP and MRP1, MRP2 is possibly involved in hypericin efflux.
GDF-15 accumulation was dispensable for MK-886 and/or HY-PDT toxicity.
More toxic concentrations of both agents lead to antioxidant adaptive response.