Bovine chromaffin cells possess FTX-sensitive calcium channels
Gandía, L.; Albillos, A.; García, A.G.
Biochemical and Biophysical Research Communications 194(2): 671-676
1993
ISSN/ISBN: 0006-291X PMID: 8393669 Document Number: 409866
Tie effects of the synthetic analogue of the toxin from the venom of the funnel-web spider Agenelopsis aperta (sFTX) on whole-cell Ba-2+ currents through Ca-2+ channels were studied in cultured bovine chromaffin cells. sFTX selectively and reversibly blocked a significant component (55+3%) of the whole-cell I-Ba. Effects of sFTX were additive to those of omega-conotoxin GVIA, a selective blocker of N-type Ca-2+ channels, and those of furnidipine, a novel dihydropyridine L-type Ca-2+ channel blocker. We conclude that the cultured bovine chromaffin cells, in addition to N- and L-type Ca-2+ channels, possess a P-type component in their whole-cell currents through their Ca-2+ channels.