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  • Title: (+)-3-(3-hydroxyphenyl)-N-(1-propyl)piperidine [(+)-3-PPP] but not (-)-3-PPP produces (+)-N-allylnormetazocine-like (SKF 10,047) discriminative stimuli.
    Author: Steinfels GF, Tam SW, Cook L.
    Journal: Life Sci; 1986 Dec 29; 39(26):2611-5. PubMed ID: 3796207.
    Abstract:
    In rats trained to discriminate the prototypic sigma receptor agonist, (+)-N-Allylnormetazocine [(+)-N-Allylnormetazocine [(+)-NANM/SKF 10,047], from saline, the (+)- but not the (-)-isomer of 3-(3-hydroxyphenyl)-N-(1-propyl)piperidine (3-PPP) produced (+)-NANM-like discriminative stimuli. (+)-3-PPP binds stereo selectively to the (+)-NANM binding site, but not to the phencyclidine binding site. Additionally, phencyclidine was found to produce (+)-NANM-like discriminative stimuli. Although the 3-PPP isomers were shown to produce changes in central dopaminergic activity (Hjorth et al. Life Sci 37, 673, 1985), the discriminative stimulus properties of (+)-3-PPP are apparently not mediated via the dopaminergic system. This hypothesis is supported by the fact that apomorphine did not produce (+)-NANM-like discriminative stimuli. These stimuli are thus non-dopaminergic and may be due to the (+)-3-PPP actions at the sigma binding site. However, it is possible that (+)-NANM, PCP, and (+)-3-PPP may have common non-sigma pharmacologic properties that account for the similar discriminative stimulus properties of these compounds.
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