caa a22 4500 469120207 CHVBK 20180323133136.0 cr unu---uuuuu 170328e19920501xx s 000 0 eng 10.1007/BF02244973 doi (NATIONALLICENCE)springer-10.1007/BF02244973 Discriminative stimulus properties of the benzodiazepine receptor antagonist flumazenil [Elektronische Daten] [Grace Rowan, Irwin Lucki] Rats were trained to discriminate the stimulus properties of the benzodiazepine (BZ) receptor antagonist flumazenil using a conditioned taste aversion procedure. On drug trials, fluid-restricted rats were injected with flumazenil (32 mg/kg), given access to a 0.25% saccharin solution for 30 min, and injected with LiCl (1.8 mEq/kg IP). On saline trials, injections of saline bracketed the period of saccharin consumption. Acquisition of the discriminated taste aversion, as measured by differential effects of drinking between saline and drug trials, developed after only five pairings of flumazenil with the LiCl injections. Flumazenil did not alter saccharin consumption in unconditioned controls (N=9) that never received LiCl. The discrimination was also measured by flumazenil's ability to reduce the preference for saccharin over tap water using two-bottle choice tests. Flumazenil demonstrated dose-dependent generalization upon decreasing the training dose as low as 1 mg/kg. Two other BZ receptor antagonists of different chemical structure, CGS 8216 and ZK 93426, substituted completely for the flumazenil stimulus. Partial generalization was exhibited to the partial inverse agonists FG 7142 and beta-CCE, while the full inverse agonists DMCM and PTZ failed to substitute for the flumazenil stimulus. The BZ receptor agonists diazepam and alprazolam failed to substitute for the flumazenil stimulus, although partial generalization was shown with CDP. The results suggest that the BZ receptor antagonist flumazenil may produce intrinsic discriminative stimulus effects that are independent from those of BZ receptor agonists or inverse agonists. Springer-Verlag, 1992 Flumazenil nationallicence Benzodiazepines nationallicence Benzodiazepine antagonists nationallicence Drug discrimination nationallicence Behavior nationallicence Rowan Grace Departments of Psychiatry and Pharmacology, University of Pennsylvania, 207 Piersol Building, 19104-4283, Philadelphia, PA, USA aut Lucki Irwin Departments of Psychiatry and Pharmacology, University of Pennsylvania, 207 Piersol Building, 19104-4283, Philadelphia, PA, USA aut Psychopharmacology Springer-Verlag 107/1(1992-05-01), 103-112 0033-3158 107:1<103 1992 107 213 https://doi.org/10.1007/BF02244973 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02244973 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rowan Grace Departments of Psychiatry and Pharmacology, University of Pennsylvania, 207 Piersol Building, 19104-4283, Philadelphia, PA, USA aut NATIONALLICENCE 700 1- Lucki Irwin Departments of Psychiatry and Pharmacology, University of Pennsylvania, 207 Piersol Building, 19104-4283, Philadelphia, PA, USA aut NATIONALLICENCE 773 0- Psychopharmacology Springer-Verlag 107/1(1992-05-01), 103-112 0033-3158 107:1<103 1992 107 213 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer