Omega-conotoxin MVIIC reversibly inhibits a human N-type calcium channel and calcium influx into chick synaptosomes.
We have investigated the effects of omega-CmTX MVIIC on the recombinant alpha 1B-mediated calcium channel expressed in HEK 293 cells and on the predominantly N-type calcium channel in chick synaptosomes. omega-CmTX MVIIC potently and reversibly inhibited the calcium current through alpha 1B-mediated calcium channels and inhibited KCl-evoked increases in [Ca2+]i in chick synaptosomes in a concentration-dependent manner.
Grantham
C J
CJ
Lilly Research Centre Ltd, Windlesham, Surrey, U.K.
Bowman
D
D
Bath
C P
CP
Bell
D C
DC
Bleakman
D
D
D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D002118:Calcium / Q000378:metabolism*; D002121:Calcium Channel Blockers / Q000494:pharmacology*; D002460:Cell Line; D002645:Chickens; D066298:In Vitro Techniques; D010455:Peptides / Q000494:pharmacology*; D013574:Synaptosomes / Q000187:drug effects* / Q000378:metabolism; D013997:Time Factors; D020960:omega-Conotoxins
D002121:Calcium Channel Blockers; D010455:Peptides; D020960:omega-Conotoxins; C075851:omega-conotoxin-MVIIC; D002118:Calcium