The effects of phencyclidine pretreatment on amphetamine-induced behavior and c-Fos expression in the rat.
Previous data demonstrate that a single injection of phencyclidine enhances amphetamine-induced behaviors 24 h later, suggesting that the delayed effects of a single dose of phencyclidine may produce a schizophrenia-like state in animals. These behavioral changes were accompanied by altered patterns of c-Fos induction, suggesting possible neurochemical correlates to the observed behaviors. Because investigations into PCP's ability to model schizophrenia have found that the effects of repeated, or subchronic, PCP administration differ according to the dose and administration paradigm, this study sought to determine whether single and subchronic PCP exposure produce different effects on amphetamine-induced behaviors and c-Fos induction. No differences were observed between these administration paradigms; both single and subchronic PCP exposure enhanced amphetamine-induced c-Fos in the striatum, decreased c-Fos in the prefrontal cortex, and decreased the number of cage-crossings. However, the observation that PCP pretreatment affected c-Fos induction in the same manner observed previously while having an opposite effect on amphetamine-induced behavior suggests that these behavioral and neurochemical effects are dissociated.
Turgeon
S M
SM
Department of Psychology Amherst College, Amherst, MA 01002, USA. smturgeon@amherst.edu
Case
L C
LC
D000661:Amphetamine / Q000494:pharmacology*; D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects*; D003342:Corpus Striatum / Q000187:drug effects / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D004357:Drug Synergism; D006179:Gyrus Cinguli / Q000187:drug effects / Q000378:metabolism; D008297:Male; D009043:Motor Activity / Q000187:drug effects; D009714:Nucleus Accumbens / Q000187:drug effects / Q000378:metabolism; D010622:Phencyclidine / Q000008:administration & dosage*; D017397:Prefrontal Cortex / Q000187:drug effects / Q000378:metabolism*; D016760:Proto-Oncogene Proteins c-fos / Q000096:biosynthesis*; D051381:Rats; D017207:Rats, Sprague-Dawley
D016760:Proto-Oncogene Proteins c-fos; D000661:Amphetamine; D010622:Phencyclidine