Gymnopilin-a substance produced by the hallucinogenic mushroom, Gymnopilus junonius-mobilizes intracellular Ca2+ in dorsal root ganglion cells
Biomedical Research – January 01, 2012
Source: OpenAlex
Summary
A compound from the hallucinogenic *Gymnopilus junonius* mushroom, gymnopilin, directly impacts mammalian cell biology. While known for depolarization, its mechanism was unclear. In cultured rat dorsal root ganglion cells, gymnopilin significantly increased intracellular calcium. In non-neuronal cells, cyclopiazonic acid and U-73122, inhibiting intracellular calcium stores and phospholipase C, blocked this, not extracellular calcium removal. This chemistry reveals gymnopilin activates phospholipase C, mobilizing intracellular calcium. This biology is crucial for Psychedelics and Drug Studies, Fungal Biology and Applications, and Plant and Biological Electrophysiology Studies.
Abstract
Gymnopilus junonius is a widely spread mushroom in Japan and well known as a hallucinogenic mushroom. Gymnopilin was purified from the fruiting body of G. junonius and was reported to act on the spinal cord and depolarize motoneurons. This is the only evidence that gymnopilin has a biological effect on animals and no mechanism of the action has been determined at all. In this study, we examined effects of gymnopilin on intracellular Ca(2+) concentrations ([Ca(2+)](i)) of cultured cells isolated from the dorsal root ganglion (DRG) of the rat. The cell culture consisted of neurons and non-neuronal cells. Gymnopilin increased [Ca(2+)](i) in both the types of cells. The gymnopilinevoked [Ca(2+)](i) rise in the non-neuronal cells was inhibited by cyclopiazonic acid and U-73122, inhibitors of Ca(2+)-ATPase of the intracellular Ca(2+) store and phospholipase C, respectively, but not by removal of extracellular Ca(2+). These results indicate that gymnopilin activated phospholipase C and mobilize Ca(2+) from the intracellular Ca(2+) store in non-neuronal cells from the DRG. This is the first report to show that gymnopilin directly acts on cells isolated from the mammalian nervous system.