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Ruthenium red: Blocker or antagonist of TRPV channels?
Cell Calcium 2024 March 19
Ruthenium red (RR) is a widely used inhibitor of Transient Receptor Potential (TRP) cation channels and other types of ion channels. Although RR has been generally accepted to inhibit TRP channels by physically blocking the ion permeation pathway, recent structural evidence suggests that it might also function as an antagonist, inducing conformational changes in the channel upon binding that result in closure of the pore. In a recent manuscript published in EMBO Reports, Ruth A. Pumroy and collaborators solve structures of TRPV2 and TRPV5 channels in the presence and absence of activators and RR. The data sheds light on the mechanism of inhibition by RR, while also opening new questions for further investigation.
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