Heterologous calcium-dependent inactivation of Orai1 by neighboring TRPV1 channels modulates cell migration and wound healing.

ABSTRACT: Store-operated calcium entry (SOCE) is an essential calcium influx mechanism in animal cells. One of the most important auto regulatory control systems involves calcium-dependent inactivation (CDI) of the Orai channel, which prevents excessive calcium influx. In the present study we analyze the role of two channels in the induction of CDI on Orai1. Here we show that calcium entering through freely diffusing TRPV1 channels induce strong CDI on Orai1 while calcium entering through P2X₄ channel does not. TRPV1 can induce CDI on Orai1 because both channels were found in close proximity in the cell membrane. This was not observed with P2X₄ channels. To our knowledge, this is the first study demonstrating that calcium arising from different channels may contribute to the mo

SUBMITTER: Bastian-Eugenio CE 

PROVIDER: S-EPMC6399350 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature