PMID- 2073594 OWN - NLM STAT- MEDLINE DCOM- 19910418 LR - 20191210 IS - 0006-8993 (Print) IS - 0006-8993 (Linking) VI - 534 IP - 1-2 DP - 1990 Nov 26 TI - Persistent elevations in dopamine and its metabolites in the nucleus accumbens after mild subchronic stress in rats with ibotenic acid lesions of the medial prefrontal cortex. PG - 321-3 AB - This study assessed the possible influence of the medial prefrontal cortex (MPFC) on the response of subcortical dopamine (DA) systems to subchronic, mild stress. DA and its metabolites as well as noradrenaline were assayed in the nucleus accumbens and corpus striatum, 1 and 7 days after one week of daily intraperitoneal saline injections (Stress) or no handling (No stress), in rats with sham (Sham) or ibotenic acid (IA) lesions of the MPFC. One day after the last saline injection the level of dihydroxyphenylacetic acid (DOPAC) was elevated in the nucleus accumbens of IA/Stress rats in comparison to the Sham/No stress, Sham/Stress, and IA/No Stress groups. Levels of mesolimbic DA, DOPAC and homovanillic acid were still elevated 7 days after the last injection in IA/Stress animals in comparison to all other groups. There were no other significant differences between the groups. The data suggest that in rats with MPFC impairment, mild subchronic stress can induce alterations in mesolimbic DA activity that persist beyond the duration of the stress. FAU - Jaskiw, G E AU - Jaskiw GE AD - Clinical Brain Disorders Branch, National Institute of Mental Health, NIMH Neuroscience Center at St. Elizabeths, Washington, DC 20032. FAU - Karoum, F K AU - Karoum FK FAU - Weinberger, D R AU - Weinberger DR LA - eng PT - Journal Article PL - Netherlands TA - Brain Res JT - Brain research JID - 0045503 RN - 0 (Catecholamines) RN - 102-32-9 (3,4-Dihydroxyphenylacetic Acid) RN - 2552-55-8 (Ibotenic Acid) RN - VTD58H1Z2X (Dopamine) RN - X4W3ENH1CV (Norepinephrine) RN - X77S6GMS36 (Homovanillic Acid) SB - IM MH - 3,4-Dihydroxyphenylacetic Acid/metabolism MH - Animals MH - Catecholamines/*metabolism MH - Cerebral Cortex/drug effects/pathology/*physiology MH - Dopamine/*metabolism MH - Handling, Psychological MH - Homovanillic Acid/metabolism MH - Ibotenic Acid/*toxicity MH - Male MH - Norepinephrine/metabolism MH - Nucleus Accumbens/*metabolism MH - Rats MH - Rats, Inbred Strains MH - Reference Values MH - Stress, Psychological/*metabolism EDAT- 1990/11/26 00:00 MHDA- 1990/11/26 00:01 CRDT- 1990/11/26 00:00 PHST- 1990/11/26 00:00 [pubmed] PHST- 1990/11/26 00:01 [medline] PHST- 1990/11/26 00:00 [entrez] AID - 0006-8993(90)90149-6 [pii] AID - 10.1016/0006-8993(90)90149-6 [doi] PST - ppublish SO - Brain Res. 1990 Nov 26;534(1-2):321-3. doi: 10.1016/0006-8993(90)90149-6.