Dukat M, El-Zahabi M, Ferretti G, Damaj MI, Martin BR, Young R, Glennon RA. (−)6-n-Propylnicotine antagonizes the antinociceptive effects of (−)Nicotine.
Bioorg Med Chem Lett 2002;
12:3005-7. [PMID:
12270194 DOI:
10.1016/s0960-894x(02)00614-5]
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Abstract
Several 6-alkyl analogues of nicotine were examined in radioligand binding and in vivo functional assays. Although (-)6-ethylnicotine (3) binds with high affinity at nACh receptors (Ki=5.6 nM) and produces nicotine-like actions, its n-propyl homologue (-)4 (Ki=22 nM) failed to produce such effects. In fact, (-)4 antagonized the antinociceptive effects of (-)nicotine in the tail-flick assay in mice, but not the spontaneous activity or discriminative stimulus effects of (-)nicotine. Compound (-)4 appears to selectively antagonize only one of the three effects examined and is an interesting cholinergic agent for subsequent investigation.
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