CHEMIN , Jean

TREK-1 is an unconventional K(+) channel that is activated by both physical and chemical stimuli. In this study, we show that the inner leaflet membrane phospholipids, including PIP(2), exert a mixed stimulatory and inhibitory effect on TREK-1. Intra-cellular phospholipids inhibit basal channel activity and activation by membrane stretch,...

L-type voltage-gated calcium channels are involved in multiple physiological functions. Currently available antagonists do not discriminate between L-type channel isoforms. Importantly, no selective blocker is available to dissect the role of L-type isoforms Cav1.2 and Cav1.3 that are concomitantly co-expressed in the heart, neuroendocrine and...

Introduction: Selective blockers are important tools for identifying the physiological role of ion channels isoforms. L-type calcium channels are high voltage activated channels sensitive to dihydropyridine (DHP). Two distinct isoforms (1C/Cav1.2 and 1D/Cav1.3) mediate calcium entry into cardiac cells to trigger respectively contraction and...