PMID- 9310406 OWN - NLM STAT- MEDLINE DCOM- 19971106 LR - 20190614 IS - 0006-8993 (Print) IS - 0006-8993 (Linking) VI - 765 IP - 1 DP - 1997 Aug 8 TI - Dizocilpine (MK-801) increases not only dopamine but also serotonin and norepinephrine transmissions in the nucleus accumbens as measured by microdialysis in freely moving rats. PG - 149-58 AB - The extracellular concentrations of dopamine (DA), norepinephrine (NE), and serotonin (5-HT) in the nucleus accumbens (NACC) of freely moving rats were monitored simultaneously via intracerebral microdialysis. Local infusion of the non-competitive N-methyl-D-aspartate (NMDA) receptor antagonist MK-801 (dizocilpine) (5-250 microM) produced significant increases in extracellular levels of DA, NE and 5-HT in a concentration-dependent fashion. Perfusion with tetrodotoxin (TTX, 1 microM) blocked the ability of focal MK-801 (50 microM) to increase DA, NE and 5-HT in the dialysate. Systemic administration of MK-801 (0.3 mg/kg, i.p.) also produced small, but statistically significant, increases in extracellular concentrations of DA, NE and 5-HT in the NACC. Our microdialysis results are consistent with the hypothesis that, in addition to dopaminergic, serotonergic and noradrenergic neurotransmissions in the NACC are involved in the mechanism by which MK-801 alters behavior in rats. Also, the present study gives further support to the concept that NMDA receptors within the NACC do not regulate DA release through direct excitatory control. FAU - Yan, Q S AU - Yan QS AD - Department of Biomedical and Therapeutic Sciences, University of Illinois College of Medicine at Peoria, 61656, USA. FAU - Reith, M E AU - Reith ME FAU - Jobe, P C AU - Jobe PC FAU - Dailey, J W AU - Dailey JW LA - eng PT - Journal Article PL - Netherlands TA - Brain Res JT - Brain research JID - 0045503 RN - 0 (Excitatory Amino Acid Antagonists) RN - 333DO1RDJY (Serotonin) RN - 4368-28-9 (Tetrodotoxin) RN - 6LR8C1B66Q (Dizocilpine Maleate) RN - VTD58H1Z2X (Dopamine) RN - X4W3ENH1CV (Norepinephrine) SB - IM MH - Animals MH - Dizocilpine Maleate/*pharmacology MH - Dopamine/*physiology MH - Excitatory Amino Acid Antagonists/*pharmacology MH - Male MH - Microdialysis MH - Motor Activity/drug effects MH - Norepinephrine/*physiology MH - Nucleus Accumbens/anatomy & histology/*drug effects MH - Rats MH - Rats, Sprague-Dawley MH - Serotonin/*physiology MH - Synaptic Transmission/*drug effects MH - Tetrodotoxin/pharmacology EDAT- 1997/08/08 00:00 MHDA- 1997/10/06 00:01 CRDT- 1997/08/08 00:00 PHST- 1997/08/08 00:00 [pubmed] PHST- 1997/10/06 00:01 [medline] PHST- 1997/08/08 00:00 [entrez] AID - S0006-8993(97)00568-4 [pii] AID - 10.1016/s0006-8993(97)00568-4 [doi] PST - ppublish SO - Brain Res. 1997 Aug 8;765(1):149-58. doi: 10.1016/s0006-8993(97)00568-4.