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2013 ; 36
(3
): 235-44
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gab.com Text
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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
PMID23912597
show 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]