A phase I study of outcomes for 36 localized prostate cancer patients followed from 2009 – 2011. Almost all had prostate removal, and nearly a third had additional androgen therapy, and were included in the trial have shown tendency to disease progression. Doses were up to 14g daily using 2g powdered extract tablets, approximately 140g raw button mushrooms. The aim was to understand if and why some patients would respond and others not.
Over a third had some initial declines in prostate specific antigen levels. Of these, two had more sustained partial response and 2 patients long term progression free status in the 3-4 year range. An additional 5 patients continued on the mushroom therapy due to stable PSA at elevated levels, meaning a quarter of the group have some level of improved outcome. If carried over into large scale trials, this is a similar or better impact than the most recent drugs such as enzalutamide have shown, with much milder side effects.
Those with the most benefit from treatment were found to have elevated natural levels of IL-15 (interleukin-15), meaning higher natural immune activity both before and during treatment phase. IL-15 can rise with infection, auto-immune activity and more. Otherwise some studies show intense exercise drive up levels modestly as does beta alanine supplementation.