Department of Psychology, University of California, Los Angeles, Los Angeles, California.
Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, Los Angeles, California.
J Stud Alcohol Drugs. 2019 Mar;80(2):245-251. doi: 10.15288/jsad.2019.80.245.
Drug craving serves as the major motivator to propagate drug use and is thought to elicit relapse in abstinent individuals. Although craving for methamphetamine has been investigated using both laboratory and neuroimaging methodologies, the relationship between drug-induced craving and neural responses to methamphetamine cues has yet to be explored. Therefore, the present study investigated whether methamphetamine-induced craving responses in the laboratory were associated with neural response to methamphetamine cues.
Non-treatment-seeking individuals with methamphetamine use disorder (n = 15) completed two sessions, one in the laboratory where they underwent a methamphetamine infusion, and one in the magnetic resonance imaging scanner where they viewed methamphetamine cues. Participants reported their craving for methamphetamine over the course of the laboratory session. Analyses examined the association between peak ratings of methamphetamine-induced craving and neural activation to methamphetamine cues.
In individuals with a methamphetamine use disorder, methamphetamine-induced craving was positively associated with neural methamphetamine cue reactivity in the precuneus, putamen, and ventromedial prefrontal cortex (Z > 2.3, p < .05).
There is a shared neurobiology underlying cue- and drug-induced craving in individuals with methamphetamine use disorder. Treatments that disrupt this circuitry may decrease craving and help prevent relapse.
药物渴求作为促使药物使用的主要动机,被认为会诱发戒断个体的复吸。尽管已经使用实验室和神经影像学方法研究了对甲基苯丙胺的渴求,但药物诱发的渴求与对甲基苯丙胺线索的神经反应之间的关系尚未得到探索。因此,本研究探讨了实验室中甲基苯丙胺诱发的渴求反应是否与对甲基苯丙胺线索的神经反应有关。
非治疗寻求的甲基苯丙胺使用障碍个体(n = 15)完成了两个阶段,一个是在实验室中进行甲基苯丙胺输注,一个是在磁共振成像扫描仪中观看甲基苯丙胺线索。参与者在实验室期间报告他们对甲基苯丙胺的渴求。分析检查了实验室期间甲基苯丙胺诱发的渴求的峰值评分与对甲基苯丙胺线索的神经激活之间的关联。
在甲基苯丙胺使用障碍个体中,甲基苯丙胺诱发的渴求与纹状体、扣带回和腹内侧前额叶皮质中的甲基苯丙胺线索反应呈正相关(Z > 2.3,p <.05)。
甲基苯丙胺使用障碍个体的线索和药物诱发的渴求存在共同的神经生物学基础。破坏这种回路的治疗方法可能会减少渴求并帮助预防复发。