TY - JOUR
T1 - Ibotenic acid lesions of prefrontal cortex do not prevent expression of behavioral sensitization to amphetamine
AU - Li, Yong
AU - Wolf, Marina E.
N1 - Funding Information:
This work was supported by USPHS grant DA07735 from the National Institute on Drug Abuse. We thank Chang-Jiang Xue for his contributions to this study.
PY - 1997/3
Y1 - 1997/3
N2 - We have shown previously that ibotenic acid lesions of the prefrontal cortex, performed prior to repeated amphetamine administration, do not affect sensitization of stereotyped behaviors but do prevent sensitization of post-stereotypy locomotor hyperactivity [Wolf et al., Neuroscience, 69 (1995) 417-439]. This could reflect an effect of the lesion on either development or expression of locomotor sensitization. To test the latter possibility, rats were treated with repeated amphetamine injections and tested to establish behavioral sensitization. Then, half received ibotenic acid lesions of prefrontal cortex and half received sham lesions. A second amphetamine challenge, 7 days later, demonstrated that the lesion failed to prevent expression of sensitization. Together with previous results, this suggests that intrinsic neurons of prefrontal cortex, most likely those sending excitatory amino acid-containing projections to the ventral tegmental area, are required for the development but not the expression of behavioral sensitization to amphetamine.
AB - We have shown previously that ibotenic acid lesions of the prefrontal cortex, performed prior to repeated amphetamine administration, do not affect sensitization of stereotyped behaviors but do prevent sensitization of post-stereotypy locomotor hyperactivity [Wolf et al., Neuroscience, 69 (1995) 417-439]. This could reflect an effect of the lesion on either development or expression of locomotor sensitization. To test the latter possibility, rats were treated with repeated amphetamine injections and tested to establish behavioral sensitization. Then, half received ibotenic acid lesions of prefrontal cortex and half received sham lesions. A second amphetamine challenge, 7 days later, demonstrated that the lesion failed to prevent expression of sensitization. Together with previous results, this suggests that intrinsic neurons of prefrontal cortex, most likely those sending excitatory amino acid-containing projections to the ventral tegmental area, are required for the development but not the expression of behavioral sensitization to amphetamine.
KW - amphetamine
KW - behavioral sensitization
KW - excitatory amino acids
KW - ibotenic acid
KW - prefrontal cortex
KW - ventral tegmental area
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U2 - 10.1016/S0166-4328(96)00158-1
DO - 10.1016/S0166-4328(96)00158-1
M3 - Article
C2 - 9079793
AN - SCOPUS:0031048394
SN - 0166-4328
VL - 84
SP - 285
EP - 289
JO - Behavioural Brain Research
JF - Behavioural Brain Research
IS - 1-2
ER -