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Titolo:
What is a "low dose" of d-amphetamine for inducing behavioral effects in laboratory rats?
Autore:
Grilly, DM; Loveland, A;
Indirizzi:
Cleveland State Univ, Dept Psychol, Biobehav Res Labs, Cleveland, OH 44115USA Cleveland State Univ Cleveland OH USA 44115 Labs, Cleveland, OH 44115USA
Titolo Testata:
PSYCHOPHARMACOLOGY
fascicolo: 2, volume: 153, anno: 2001,
pagine: 155 - 169
Fonte:
ISI
Lingua:
ENG
Soggetto:
REACTION-TIME TASK; DISCRIMINATIVE-STIMULUS; SEX-DIFFERENCES; INDIVIDUAL-DIFFERENCES; SELECTIVE ATTENTION; LOCOMOTOR-ACTIVITY; LATENT INHIBITION; FOOD-INTAKE; BASE-LINE; C-FOS;
Keywords:
low dose; amphetamine; rat; behavior;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
129
Recensione:
Indirizzi per estratti:
Indirizzo: Grilly, DM Cleveland State Univ, Dept Psychol, Biobehav Res Labs, Cleveland, OH 44115USA Cleveland State Univ Cleveland OH USA 44115 eland, OH 44115USA
Citazione:
D.M. Grilly e A. Loveland, "What is a "low dose" of d-amphetamine for inducing behavioral effects in laboratory rats?", PSYCHOPHAR, 153(2), 2001, pp. 155-169

Abstract

Background: Because of the amphetamines' abuse potential and capability ofexacerbating or inducing mood and psychotic disturbances, investigations of the behavioral effects of amphetamines commonly involve non-human animals, with the laboratory rat being by far the most common species used. Although investigators of the behavioral effects of amphetamine in rats sometimesrefer to doses used as being "low", "moderate", "high", etc., it is not clear in what sense these terms apply. Objectives: To develop an operational definition of a low dose of amphetamine in rats, we reviewed studies that assessed the behavioral effects of dextroamphetamine (d-AMP) in rats in which some subset of doses, administered SC, IM or IP, was described as being "low". We then used the results of these studies to establish what the lowest effective dose ranges were across a variety of behavioral domains and compared these doses and their effects with those obtained with normal, healthy adult humans. Results: While the range of the lowest doses used in the studies with rats was quite broad (0.025-2.0 mg/kg), the median lowest effective doses observed tin the studies using doses of 0.125 mg/kg or less) werebetween 0.125 and 0.165 mg/kg across the behavioral domains of consummatory behavior, unconditioned or spontaneous behavior, learned behavior, and drug discriminative control. This range of doses was also found to be comparable to the lowest behaviorally effective doses of d-AMP (SC or PO) in normal human adults, which suggests that the sensitivity to the behavioral effects of amphetamine in these two species is fairly comparable. Conclusions: Because of their ability to alter a wide variety of behaviors in rats, we conclude that low doses of d-AMP are in the 0.1-0.4 mg/kg range. Doses withinthis range typically: 1) constitute the ED50 in most drug discrimination/generalization procedures; 2) increase a variety of consummatory behaviors; 3) increase a variety of unconditioned or spontaneous motor activities; 3) increase low rate schedule-controlled behavior while exerting variable effects on high rate schedule controlled behavior; and 5) improve performance on some choice tasks, particularly those requiring sustained attention. Our analyses also indicate that, with respect to behavior, investigators do notalways agree on what constitutes a low dose of amphetamine in rats and that doses assumed to be low for this species often are relatively high.

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Documento generato il 25/01/20 alle ore 06:16:51