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  • Title: Acetylcholinesterase inhibition by pitofenone: a spasmolytic compound.
    Author: Punekar NS, Kulkarni AV.
    Journal: Biotechnol Appl Biochem; 1991 Dec; 14(3):378-82. PubMed ID: 1777122.
    Abstract:
    Pitofenone, a spasmolytic compound, inhibited the acetylcholinesterase activity from bovine erythrocytes and from electric eel. It is a potent inhibitor of this enzyme from the two sources, with Ki values of 36 and 45 microM, respectively. Of the five compounds structurally related to pitofenone, only those containing a piperidine moiety show acetylcholinesterase inhibition. All these inhibitions are reversible, linear, and noncompetitive in nature. A qualitative correlation between the anticholinesterase and the corresponding antimuscarinic activity for some of these compounds was apparent. Good separation of these two effects would be a desirable feature for newer muscarinic antagonists.
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