Perforated-patch method reveals extracellular ATP-induced K+ conductance in dissociated rat nucleus solitarii neurons.
Extracellular adenosine 5'-triphosphate (ATP)-induced responses were investigated in acutely dissociated rat nucleus tractus solitarii (NTS) neurons, using nystatin perforated-patch and conventional whole-cell patch-clamp recordings. Extracellular application of ATP could evoke the inward currents with both methods. An additional outward current was observed only with the perforated patch method. The outward current resulted in an increase of K+ conductance which was activated by Ca2+ influx through the ATP receptor-channel complex.
Ueno
S
S
Department of Neurophysiology Tohoku University School of Medicine, Sendai, Japan.
Ishibashi
H
H
Akaike
N
N
D000255:Adenosine Triphosphate / Q000494:pharmacology*; D000818:Animals; D002118:Calcium / Q000378:metabolism; D004553:Electric Conductivity / Q000187:drug effects; D066298:In Vitro Techniques; D008526:Medulla Oblongata / Q000187:drug effects*; D015221:Potassium Channels / Q000187:drug effects*; D051381:Rats; D017208:Rats, Wistar
D015221:Potassium Channels; D000255:Adenosine Triphosphate; D002118:Calcium