PIEZO1 Channel is Involved in Electric Field Guided Cell Migration
Objective Disruption of epithelial layer may instantaneously induce the generation of endogenous electric fields,which was proved to play an important role in guiding the cell migration and promoting wound healing.PIEZO 1 is a kind of mechanic sensitive channel,may be regulated by voltage,is proved to involve in chemotactic migration of cells and play an important role in the process of wound healing.In this paper,the role of PIEZO 1 and its downstream proteins FAK and integrin β1 in the electric field guided cell migration were investigated by HaCaT cells(human immortalized keratinocyte).Methods Cell migration was tracked by Living Cell Imaging System in directed current(DC)electric field(EF).Inhibitors and RNAi techniques were applied to study the function of PIEZO 1 and other related proteins in electric fields.Western blot was used to detect the expression and phosphorylation levels of integrin β1 and FAK in electric field guided migration under EF stimulation.Results Piezo1 RNAi as well as Ruthenium red and GsMTx4 treatment all significantly inhibited the electrotaxis of HaCaT cells.Electric field stimulation with GsMTx4 treatment alone increased FAK phosphorylation level and the expression of integrin β1.Electric field promoted the expression level of integrin β1 and the phosphorylation level of FAK.Inhibiting the expression of PIEZO 1 by RNAi significantly attenuated the phosphorylation level of FAK under EF stimulation.Inhibition of integrin β1 and FAK by inhibitor significantly decrease the electric field guided cell migration.Conclusion PIEZO1 as well as integrin β1 and FAK are involved in the electric field guided cell migration of HaCaT cells.Electric field signals regulate the expression of integrin β1 and the activation of FAK through PIEZO 1-mediated signal pathway to orchestrate cell migration.
electric fieldselectrotaxiscell migrationHaCaTPIEZO1integrin β1FAK
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