2022 - Transient receptor potential channel vanilloid type 2 in red cells of cannabis consumer
SyncroPatch 384 publication in American Journal of Hematology (2022)
Flormann D., Qiao M., Murciano N., Iacono G., Darras A., Hof S., Recktenwald S.M., Rotordam M.G., Becker N., Geisel J., Wagner C., von Lindern M., van den Akker E., Kaestner L.
American Journal of Hematology (2022) doi:10.1002/ajh.26509
The presence of the Transient Receptor Potential channel Vanilloid type 2 (TRPV2) in red blood cells (RBCs) was recently discovered. TRPV2 is a non-selective cation channel that is reported to be mechanosensitive having numerous properties in common with Piezo1. TRPV2 channels can be activated by Δ9-tetrahydrocannabinol (Δ9-THC) and the changes induced in RBC by application of Δ9-THC can be attributed to TRPV2 channel activity. A previous study shown that addition of 30 µM Δ9-THC led to a large fraction of super hydrated RBCs in a healthy donor consuming marijuana in contrast to significantly milder response from no smoker healthy donors. For further investigations three marijuana consumers with very similar smoking habits were scouted, and blood was collected. Whether this heightened sensitivity of the smokers (MS) vs. no-smokers (NS) RBCs is caused by hypersensitizing of TRPV2 was tackled by comparing MS and NS RBCs in functional patch-clamp measurements using the high - throughput automated patch clamp platform SyncroPatch 384. Whole-cell currents elicited by THC application did not show a significant different thus indicates a similar cellular conductance for MS and NS RBCs and therefore rather a lack of difference in TRPV2 expression level. We demonstrate that APC technology is a suitable tool permits for studying TRPV2 channels in RBCs.