Interaction of iberiotoxin with beta-adrenoceptor agonists and sodium nitroprusside on guinea pig trachea.


Airway smooth muscle plasma membranes contain a variety of functional K+ channels. In particular, there is a predominance of Ca(2+)-activated K+ channels (maxi-K). Inhibition of these K+ channels has been postulated to account for the ability of charybdotoxin (ChTX) to produce contraction of airway smooth muscle and to modify the relaxant effects of beta… (More)


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