Department of Biology, Neuroscience Institute, Georgia State University, Atlanta, GA 30302-5030, USA.
Behav Brain Res. 2010 Nov 12;213(1):109-12. doi: 10.1016/j.bbr.2010.04.011. Epub 2010 Apr 13.
Previously we reported that time-dependent increases in cue-induced reinstatement of cocaine seeking were attenuated in rats self-administering cocaine as adolescents, compared with adults (Li and Frantz (2009)). Now using sucrose self-administration, we report time-dependent increases in cue-induced reinstatement of sucrose seeking are similar across age groups, suggesting that age differences in reinstatement of cocaine seeking depend on specific effects of cocaine, not a compromised ability among younger rats to associate cues with rewards.
此前我们曾报道,与成年大鼠相比,青少年时期自我施用可卡因的大鼠,其线索诱导的可卡因觅药复吸会随时间推移而逐渐减弱(Li 和 Frantz,2009)。现在,我们通过蔗糖自我给药实验发现,不同年龄段的大鼠,其线索诱导的蔗糖觅药复吸均随时间推移而增加,这表明可卡因对复吸的影响具有特异性,而不是由于幼年大鼠将线索与奖励联系起来的能力受损,导致可卡因觅药复吸的年龄差异。