Transient receptor potential channels (TRP) are non-selective calcium permeant cation channel located mostly on the plasma membrane of numerous animal cell types. They are involved in osmotic sensitivity and mechano-sensitivity. The exposure to hypotonicity within the physiological range induces some TRP channels activation exhibiting an outward rectification. [[ https://acroscell.creative-bioarray.com/trp-channels.html | TRP channels ]] can also be activated by heat, low pH, citrate and phorbol esters. The increase of intracellular Ca2+ potentiates TRP channel currents. TRP Channels play an obligatory role as a molecular component in the nonselective cation channel activation induced by 4-alpha-phorbol 12,13-didecanoate and hypotonic stimulation in synoviocytes and also regulates production of IL-8.