Determination of (1) the absolute number of cholinergic receptors, (2) the cholinergic binding kinetics, and (3) the direct antimuscarinic activity of a series of uropharmacologic agents was accomplished by radioligand binding techniques in tissue derived from human urinary bladder. The competition between 3H‐quinuclidinyl benzilate (3H‐QNB) binding and selective antagonists provided the first quantitative assessment of cholinergic receptor characteristics in the human bladder fundus and represents a potential method for assessing the antimuscarinic binding potential of uropharmacologic agents.
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Levin et al. (1982) studied this question.