TRPC5 - "Internal perfusion of Ca2+ to activate hTRPC5 on Nanion's SyncroPatch 384PE"
SyncroPatch 384PE (a predecessor model of the SyncroPatch 384i) application note (1.7 MB)
Cells were kindly provided by Charles River.
Transient Receptor Potential Canonical (TRPC) channels are a subfamily of TRP channels. The TRPC family contains at least 7 subunits and are predominantly expressed in neuronal cells where they may play an important role in Ca2+ flux. TRPC5 channels are non-selective cation channels expressed in many areas of the brain particularly the hippocampus, amygdala and cerebellum, amongst others. Although the physiological and pathophysiological role of TRPC5 is not fully known, it does appear to be important in neuronal function, in particular during development where it is involved in hippocampal neurite outgrowth and growth cone morphology. Knockout mouse studies have also revealed that TRPC5 plays an essential role in innate fear. TRPC5 is expressed in some regions outside of the CNS including the heart where it contributes to cardiac hypertrophy in heart failure. TRPC5 is activated by intracellular calcium. Using the SyncroPatch 384PE, TRPC5 expressed in HEK cells could be activated by perfusion of the intracellular solution to contain free-Ca2+. This current was potentiated by the lanthanide, gadolinium (Gd3+), as expected and blocked by 2-APB with an IC50 consistent with that reported in the literature.