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Sphingosine and FTY720 modulate pacemaking activity in interstitial cells of Cajal from mouse small intestine #MMPMID23912597
Nam JH; Kim WK; Kim BJ
Mol Cells 2013[Sep]; 36 (3): 235-44 PMID23912597show ga
Interstitial cells of Cajal (ICCs) are the pacemakers of the gastrointestinal tract, and transient receptor potential melastatin type 7 (TRPM7) and Ca(2+) activated Cl(-) channels (ANO1) are candidate the generators of pacemaker potentials in ICCs. The effects of D-erythro-sphingosine (SPH) and structural analogues of SPH, that is, N,N-dimethyl-Derythro-sphingosine (N,N-DMS), FTY720, and FTY720-P on the pacemaking activities of ICCs were examined using the whole cell patch clamp technique. SPH, N,N-DMS, and FTY720 decreased the amplitudes of pacemaker potentials in ICC clusters, but resting membrane potentials displayed little change. Also, perfusing SPH, N,N-DMS, or FTY720 in the bath reduced both inward and outward TRPM7-like currents in single ICCs, and inhibited ANO1 currents. The another structural analogue of SPH, FTY720-P was ineffective at the pacemaker potentials in ICC clusters and the TRPM7-like currents in single ICCs. Furthermore, FTY720-P had no effect on ANO1. These results suggest that SPH, N,N-DMS, and FTY720 modulate the pacemaker activities of ICCs, and that TRPM7 and ANO1 channels affect intestinal motility.
|Animals[MESH]
|Biological Clocks[MESH]
|Chloride Channels/*physiology[MESH]
|Female[MESH]
|Fingolimod Hydrochloride[MESH]
|Gastrointestinal Motility/*physiology[MESH]
|HEK293 Cells[MESH]
|Humans[MESH]
|Interstitial Cells of Cajal/drug effects/*physiology[MESH]
free
free
free
Mol+Cells 2013 ; 36 (3): 235-44
