Combined dieting and stress evoke exaggerated responses to opioids in binge-eating rats

被引:89
作者
Boggiano, MA [1 ]
Chandler, PC [1 ]
Viana, JB [1 ]
Oswald, KD [1 ]
Maldonado, CR [1 ]
Wauford, PK [1 ]
机构
[1] Univ Alabama Birmingham, Dept Psychol, Behav Neurosci Div, Birmingham, AL 35294 USA
关键词
hyperphagia; intermittent palatable food; naloxone; butorphanol; caloric restriction;
D O I
10.1037/0735-7044.119.5.1207
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
The authors developed an animal model of binge eating where history of caloric restriction with footshock stress (R + S) causes rats to consume twice the normal amount of palatable food. The authors tested the hypothesis that binge eating is mediated by changes in opioid control of feeding by comparing rats' anorectic and orexigenic responses to naloxone and butorphanol, respectively, and by testing the ability of butorphanol to elicit binge eating of chow when palatable food was absent. Mu/kappa opioid-receptor blockade and activation had exaggerated responses in the R + S rats with naloxone suppressing binge eating to control levels, and although butorphanol did not trigger chow binge eating, it enhanced binge eating of palatable food. These responses in sated normal-weight rats strengthen evidence that reward, over metabolic need, drives binge eating.
引用
收藏
页码:1207 / 1214
页数:8
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