PMID- 16420437 OWN - NLM STAT- MEDLINE DCOM- 20060406 LR - 20161124 IS - 0953-816X (Print) IS - 0953-816X (Linking) VI - 23 IP - 1 DP - 2006 Jan TI - Decrease in parvalbumin-expressing neurons in the hippocampus and increased phencyclidine-induced locomotor activity in the rat methylazoxymethanol (MAM) model of schizophrenia. PG - 279-84 AB - Treatment of rats with methylazoxymethanol (MAM) on gestational day (GD)17 disrupts corticolimbic development in the offspring (MAM-GD17 rats) and leads to abnormalities in adult MAM-GD17 rats resembling those described in schizophrenic patients. The underlying changes in specific cortical and limbic cell populations remain to be characterised. In schizophrenia, decreases in inhibitory gamma-aminobutyric acid (GABA)-containing interneurons that express the calcium-binding protein parvalbumin have been reported in the prefrontal cortex and hippocampus. In this study we analysed the expression of parvalbumin (PV), calretinin (CR) and calbindin (CB) in the prefrontal cortex and hippocampus of MAM-GD17 rats. Exposure in utero to MAM led to a significant decrease in the number of neurons expressing PV in the hippocampus, but not the prefrontal cortex. Neurons expressing CR or CB were not affected in either structure. The neurochemical changes in MAM-GD17 rats were accompagnied by increased hyperlocomotion after administration of phencyclidine (PCP), analogous to the hypersensitivity of schizophrenic patients to PCP. Therefore, the developmental MAM-GD17 model reproduces key neurochemical and behavioural features that reflect cortical and subcortical dysfunction in schizophrenia, and could be a useful tool in the development of new antipsychotic drugs. FAU - Penschuck, Silke AU - Penschuck S AD - Department of Neuroscience, 900, Lundbeck Research USA, Inc., 215 College Road, Paramus, NJ 07652-1431, USA. SILP@lundbeck.com FAU - Flagstad, Peter AU - Flagstad P FAU - Didriksen, Michael AU - Didriksen M FAU - Leist, Marcel AU - Leist M FAU - Michael-Titus, Adina T AU - Michael-Titus AT LA - eng PT - Comparative Study PT - Journal Article PL - France TA - Eur J Neurosci JT - The European journal of neuroscience JID - 8918110 RN - 0 (Excitatory Amino Acid Antagonists) RN - 0 (Parvalbumins) RN - 592-62-1 (Methylazoxymethanol Acetate) RN - J1DOI7UV76 (Phencyclidine) RN - JGG19N3YDQ (methylazoxymethanol) SB - IM MH - Analysis of Variance MH - Animals MH - Behavior, Animal/drug effects MH - Cell Count/methods MH - Disease Models, Animal MH - Embryo, Mammalian MH - Excitatory Amino Acid Antagonists/*pharmacology MH - Female MH - Gene Expression/drug effects MH - Hippocampus/drug effects/*pathology MH - Immunohistochemistry/methods MH - Methylazoxymethanol Acetate/*analogs & derivatives MH - Motor Activity/*drug effects MH - Neurons/drug effects/*metabolism MH - Parvalbumins/*metabolism MH - Phencyclidine/*pharmacology MH - Prefrontal Cortex/drug effects/pathology MH - Pregnancy MH - Prenatal Exposure Delayed Effects MH - Rats MH - Rats, Wistar MH - *Schizophrenia/chemically induced/metabolism/physiopathology MH - Time Factors EDAT- 2006/01/20 09:00 MHDA- 2006/04/07 09:00 CRDT- 2006/01/20 09:00 PHST- 2006/01/20 09:00 [pubmed] PHST- 2006/04/07 09:00 [medline] PHST- 2006/01/20 09:00 [entrez] AID - EJN4536 [pii] AID - 10.1111/j.1460-9568.2005.04536.x [doi] PST - ppublish SO - Eur J Neurosci. 2006 Jan;23(1):279-84. doi: 10.1111/j.1460-9568.2005.04536.x.