The overall objective of the proposed research is to use the repeated-acquisition technique and a cumulative-dosing procedure to assess the effects of PCP in combination with other drugs on complex operant behavior in patas monkeys. In the first series of experiments, our specific aims are 1) to characterize the behavioral effects observed when PCP is administered in combination with another abused drug (cocaine, heroin, MDA, nicotine, methaqualone, alcohol, THC, or PPA) and 2) to determine whether the effects of the combination are predictable from the individual actions of the two drugs. In the second series of experiments, our specific aim is to test two potential PCP antagonists, namely, cyclazocine and chlorpromazine. With regard to methodology, the technique of repeated acquisition is important because it provides the means for studying drug effects on learning, defined as within-session error reduction, in individual subjects. This point is especially relevant to studying PCP's effects since there are often marked individual differences in the response to PCP. The cumulative-dosing technique is valuable because a dose-effect curve for a drug can be obtained in a single day. From a clinical point of view, it is important to study the effects of PCP in combination with other abused drugs because multiple drug use is widespread and such combinations can present a significant health hazard. The clinical significance of finding a specific PCP antagonist is self-evident. A specific antagonist would also be important theoretically in helping to unravel the neurochemical mechanism(s) underlying the behavioral effects of PCP.

Agency
National Institute of Health (NIH)
Institute
National Institute on Drug Abuse (NIDA)
Type
Research Project (R01)
Project #
5R01DA001528-09
Application #
3206929
Study Section
(BPNA)
Project Start
1976-06-29
Project End
1986-06-30
Budget Start
1985-04-01
Budget End
1986-06-30
Support Year
9
Fiscal Year
1985
Total Cost
Indirect Cost
Name
Georgetown University
Department
Type
School of Medicine & Dentistry
DUNS #
049515844
City
Washington
State
DC
Country
United States
Zip Code
20057
Winsauer, P J; Thompson, D M (1992) Differential interaction of cholecystokinin with morphine and phencyclidine: effects on operant behavior in pigeons. Pharmacol Biochem Behav 41:83-90
Winsauer, P J; Thompson, D M (1991) Cocaine self-administration in pigeons. Pharmacol Biochem Behav 40:41-52
Thompson, D M; Winsauer, P J; Mastropaolo, J (1987) Effects of phencyclidine, ketamine and MDMA on complex operant behavior in monkeys. Pharmacol Biochem Behav 26:401-5
Thompson, D M; Mastropaolo, J; Winsauer, P J et al. (1986) Repeated acquisition and delayed performance as a baseline to assess drug effects on retention in monkeys. Pharmacol Biochem Behav 25:201-7
Thompson, D M; Winsauer, P J (1986) Nicotine can attenuate the disruptive effects of phencyclidine on repeated acquisition in monkeys. Pharmacol Biochem Behav 25:185-90
Thompson, D M; Winsauer, P J (1985) Delta-9-tetrahydrocannabinol potentiates the disruptive effects of phencyclidine on repeated acquisition in monkeys. Pharmacol Biochem Behav 23:1051-7
Moerschbaecher, J M; Thompson, D M; Winsauer, P J (1985) Effects of opioids and phencyclidine in combination with naltrexone on the acquisition and performance of response sequences in monkeys. Pharmacol Biochem Behav 22:1061-9
Thompson, D M; Winsauer, P J (1985) Cocaine potentiates the disruptive effects of phencyclidine on repeated acquisition in monkeys. Pharmacol Biochem Behav 23:823-9
Winsauer, P J; Thompson, D M; Moerschbaecher, J M (1985) Comparison of drug effects on fixed-ratio performance and chain performance maintained under a second-order fixed-ratio schedule. J Exp Anal Behav 44:367-76