Stereoselective effects of the second-generation synthetic cathinone α-pyrrolidinopentiophenone (α-PVP): assessments of conditioned taste avoidance in rats

Rationale Work with α-pyrrolidinopentiophenone (α-PVP), a second-generation synthetic cathinone, has been generally limited to the racemate. Given that with other synthetic cathinones, there are behavioral and neurochemical differences between their enantiomers, differences may also be seen with α-PVP. Objectives The present study assessed the relative contribution of each enantiomer to the aversive effects of racemic-α-PVP by comparing their ability to induce a conditioned taste avoidance. Methods Adult male Sprague-Dawley rats were exposed every other day for four exposures to a novel saccharin solution followed immediately by an injection of 0 (saline vehicle) or 1.5, 3, or 6 mg/kg of S-, R-, or racemic-α-PVP (IP). On alternating days, all subjects were given access to water to assess any unconditioned effects of α-PVP on general fluid consumption. Results Rats injected with the racemate and S-isomer of α-PVP displayed avoidance of the drug-associated saccharin solution, although this avoidance was dose-dependent only for the subjects injected with the racemate. There was no evidence of taste avoidance in animals injected with the R-enantiomer at any dose tested. Animals injected with 3 mg/kg racemic-α-PVP did not differ in avoidance from those treated with 1.5 mg/kg of the S-enantiomer, but subjects treated with 6 mg/kg racemic-α-PVP displayed a significantly stronger avoidance than those treated with 3 mg/kg S-α-PVP. Conclusions The present work suggests that the aversive effects of racemic α-PVP are mediated primarily by its S-isomer. The fact that at the highest dose tested (6 mg/kg), the racemate induces an avoidance greater than the simple additive effects of the S- and R-isomers (at 3 mg/kg) suggests that while the R-isomer may not induce taste avoidance at this dose, it may interact synergistically with the S-isomer in mediating the effects of the racemic mixture. These results were discussed in terms of similar effects with other behavioral and physiological endpoints reported with a number of psychostimulants and suggest that the enantiomers of α-PVP are an important variable in characterizing its behavioral effects..

Medienart:

E-Artikel

Erscheinungsjahr:

2018

Erschienen:

2018

Enthalten in:

Zur Gesamtaufnahme - volume:236

Enthalten in:

Psychopharmacology - 236(2018), 3 vom: 17. Okt., Seite 1067-1077

Sprache:

Englisch

Beteiligte Personen:

Nelson, Katharine H. [VerfasserIn]
López-Arnau, Raul [VerfasserIn]
Hempel, Briana J. [VerfasserIn]
To, Peter [VerfasserIn]
Manke, Hayley N. [VerfasserIn]
Crissman, Madeline E. [VerfasserIn]
Clasen, Matthew M. [VerfasserIn]
Rice, Kenner C. [VerfasserIn]
Riley, Anthony L. [VerfasserIn]

Links:

Volltext [lizenzpflichtig]

Themen:

α-PVP
“Bath salts”
Conditioned taste avoidance
Enantiomers
Synthetic cathinones

RVK:

RVK Klassifikation

Anmerkungen:

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

doi:

10.1007/s00213-018-5070-x

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

OLC2089891475

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