PMID- 18059437 OWN - NLM STAT- MEDLINE DCOM- 20081222 LR - 20220309 IS - 1740-634X (Electronic) IS - 0893-133X (Linking) VI - 33 IP - 10 DP - 2008 Sep TI - Postnatal phencyclidine administration selectively reduces adult cortical parvalbumin-containing interneurons. PG - 2442-55 AB - Transient postnatal NMDA receptor blockade by phencyclidine (PCP), ketamine, or MK-801 induces developmental neuroapoptosis and adult behavioral deficits, which resemble abnormal human behaviors typically present in schizophrenia. This study tested the hypothesis that PCP-induced developmental apoptosis causes a specific deficit of GABAergic interneurons containing parvalbumin (PV), calretinin (CR), or calbindin (CB). Young adult (PND56) rats that were given a single dose of PCP (10 mg/kg) on PND7 exhibited no densitometric change of either CR or CB neurons in any brain region studied, but demonstrated a selective deficit of PV-containing neurons in the superficial layers (II-IV) of the primary somatosensory (S1), motor (M), and retrosplenial cortices, but not in the striatum (CPu) or hippocampus. Further, CR and CB neurons, which were expressed at the time of PCP administration, showed no colocalization with cellular markers of apoptosis (terminal dUTP nick-end labeling (TUNEL) of broken DNA or cleaved caspase-3), indicating that CR- and CB-containing neurons were protected from the toxic effect of PCP and survived into adulthood. This suggests that the deletion of PV neurons occurred during development, but cleaved caspase-3 showed no colocalization with BrdU, a specific marker of S-phase proliferation. These data suggest that the loss of PV-containing neurons was not due to an effect of PCP on proliferating neurons, but rather an effect on post-mitotic neurons. The developmental dependence and neuronal specificity of this effect of PCP provides further evidence that this model may be valuable in exploring the pathophysiology of schizophrenia. FAU - Wang, Cheng Z AU - Wang CZ AD - Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, TX 77555-1031, USA. czwang@utmb.edu FAU - Yang, San F AU - Yang SF FAU - Xia, Yan AU - Xia Y FAU - Johnson, Kenneth M AU - Johnson KM LA - eng GR - DA02073/DA/NIDA NIH HHS/United States GR - MH63871/MH/NIMH NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20071205 PL - England TA - Neuropsychopharmacology JT - Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology JID - 8904907 RN - 0 (CALB2 protein, human) RN - 0 (Calb2 protein, rat) RN - 0 (Calbindin 2) RN - 0 (Calbindins) RN - 0 (Excitatory Amino Acid Antagonists) RN - 0 (Parvalbumins) RN - 0 (S100 Calcium Binding Protein G) RN - EC 3.4.22.- (Caspase 3) RN - G34N38R2N1 (Bromodeoxyuridine) RN - J1DOI7UV76 (Phencyclidine) SB - IM MH - Animals MH - Animals, Newborn MH - Apoptosis/*drug effects/physiology MH - Bromodeoxyuridine MH - Calbindin 2 MH - Calbindins MH - Caspase 3/metabolism MH - Cell Count MH - Cell Proliferation/drug effects MH - Cell Survival/drug effects/physiology MH - Cerebral Cortex/*drug effects/growth & development/metabolism MH - Disease Models, Animal MH - Excitatory Amino Acid Antagonists/toxicity MH - Female MH - Interneurons/*drug effects/metabolism MH - Male MH - Parvalbumins/*metabolism MH - Phencyclidine/*toxicity MH - Rats MH - Rats, Sprague-Dawley MH - S100 Calcium Binding Protein G/metabolism MH - Schizophrenia/chemically induced/*metabolism/physiopathology MH - Time EDAT- 2007/12/07 09:00 MHDA- 2008/12/23 09:00 CRDT- 2007/12/07 09:00 PHST- 2007/12/07 09:00 [pubmed] PHST- 2008/12/23 09:00 [medline] PHST- 2007/12/07 09:00 [entrez] AID - 1301647 [pii] AID - 10.1038/sj.npp.1301647 [doi] PST - ppublish SO - Neuropsychopharmacology. 2008 Sep;33(10):2442-55. doi: 10.1038/sj.npp.1301647. Epub 2007 Dec 5.