PMID- 12921913 OWN - NLM STAT- MEDLINE DCOM- 20031023 LR - 20220310 IS - 0278-5846 (Print) IS - 0278-5846 (Linking) VI - 27 IP - 5 DP - 2003 Aug TI - Immunohistochemical study of brain-derived neurotrophic factor and its receptor, TrkB, in the hippocampal formation of schizophrenic brains. PG - 801-7 AB - Recently, the pathogenesis of schizophrenia has been investigated from the perspective of neurodevelopmental dysfunction theory. On the other hand, it has been indicated that neurotrophic factors, such as nerve growth factors, brain-derived neurotrophic factor (BDNF), and neurotrophin-3, are significantly involved in the development and functional differences of central nervous system (CNS). Some reports proposed that the dysfunction of these factors could explain the pathogenesis of schizophrenia possibly. In this study, the authors investigated immunohistochemically the distribution and/or morphology of BDNF and TrkB, its peculiar receptor, in the hippocampal formation of schizophrenic brain. As a result, BDNF-positive pyramidal cells in the CA2 and neurons in the CA3 and the field of the CA4 were intensely stained compared to those of normal control. Staining of TrkB-positive neurons showed a signet-ring like shape in the hippocampus of normal control brains. Such figures were not observed on staining of those neurons from schizophrenic brains. In the control cases, TrkB-immunopositive varicose fibers were frequently seen. Those observed differences between schizophrenic and normal cases may indicate the existence of dysfunction of BDNF and TrkB in schizophrenic brain, and this dysfunction may be one of the factors involved in the pathogenesis of schizophrenia. FAU - Iritani, Shuji AU - Iritani S AD - Department of Psychiatry, Tokyo Metropolitan Matsuzawa Hospital, 2-1-1 Kamikitazawa, Setagaya, Tokyo 156-0057, Japan. iritani@matsuzawa-hp.metro.tokyo.jp FAU - Niizato, Kazuhiro AU - Niizato K FAU - Nawa, Hiroyuki AU - Nawa H FAU - Ikeda, Kenji AU - Ikeda K FAU - Emson, Piers C AU - Emson PC LA - eng PT - Comparative Study PT - Journal Article PL - England TA - Prog Neuropsychopharmacol Biol Psychiatry JT - Progress in neuro-psychopharmacology & biological psychiatry JID - 8211617 RN - 0 (Brain-Derived Neurotrophic Factor) RN - EC 2.7.10.1 (Receptor, trkB) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Brain-Derived Neurotrophic Factor/*analysis/metabolism MH - Female MH - Hippocampus/*chemistry/metabolism/pathology MH - Humans MH - Immunohistochemistry MH - Male MH - Middle Aged MH - Receptor, trkB/*analysis/metabolism MH - Schizophrenia/metabolism/pathology EDAT- 2003/08/19 05:00 MHDA- 2003/10/24 05:00 CRDT- 2003/08/19 05:00 PHST- 2003/08/19 05:00 [pubmed] PHST- 2003/10/24 05:00 [medline] PHST- 2003/08/19 05:00 [entrez] AID - S0278-5846(03)00112-X [pii] AID - 10.1016/S0278-5846(03)00112-X [doi] PST - ppublish SO - Prog Neuropsychopharmacol Biol Psychiatry. 2003 Aug;27(5):801-7. doi: 10.1016/S0278-5846(03)00112-X.