PMID- 12824057 OWN - NLM STAT- MEDLINE DCOM- 20030905 LR - 20190827 IS - 0169-328X (Print) IS - 0169-328X (Linking) VI - 115 IP - 1 DP - 2003 Jul 4 TI - Temporal changes in the expression of brain-derived neurotrophic factor mRNA in the ventromedial nucleus of the hypothalamus of the developing rat brain. PG - 69-77 AB - Brain-derived neurotrophic factor (BDNF) is a member of the neurotrophin family, which is important for the growth, differentiation, and survival of neurons during development. We have performed a detailed mapping of BDNF mRNA in the neonatal rat brain using a quantitative in situ hybridization technique. At postnatal day (PND) 4, hypothalamic structures showed only modest expression of BDNF mRNA, with the exception of the ventromedial nucleus (VMN), where expression was higher than that detected in the hippocampus. Abundant BDNF mRNA was also found in the bed nucleus of the anterior commissure, retrosplenial granular cortex, and the posteroventral part of the medial amygdaloid nucleus. Messenger RNAs encoding other neurotrophins, including nerve growth factor (NGF) and neurotrophin-3 (NT-3) and the BDNF receptor trkB, were not selectively localized in neonatal VMN. During subsequent developmental stages, BDNF mRNA expression in the VMN changed dynamically, peaking at PND 4 and falling to minimal levels in the adult brain. In contrast, the low levels of BDNF mRNA observed in the CA3 region of the hippocampus increased to adult levels following PND 10. As the VMN undergoes sexual differentiation, we compared BDNF, NGF, NT-3, and trkB mRNA expression in the VMN in males and females at embryonic day 20 and PND 4, but found no differences between them. These results suggest that localized and high level expression of BDNF mRNA in the neonatal VMN plays an important role in its neural organization and functional development. FAU - Sugiyama, Nobuhiro AU - Sugiyama N AD - Department of Neuropsychiatry, University of Yamanashi Faculty of Medicine, Tamaho, Yamanashi 409-3898, Japan. FAU - Kanba, Shigenobu AU - Kanba S FAU - Arita, Jun AU - Arita J LA - eng PT - Comparative Study PT - Journal Article PL - Netherlands TA - Brain Res Mol Brain Res JT - Brain research. Molecular brain research JID - 8908640 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Neurotrophin 3) RN - 0 (RNA, Messenger) RN - 9061-61-4 (Nerve Growth Factor) RN - EC 2.7.10.1 (Receptor, trkB) SB - IM MH - Aging/*genetics MH - Animals MH - Animals, Newborn MH - Brain-Derived Neurotrophic Factor/*genetics MH - Cell Differentiation/*genetics MH - Female MH - Fetus MH - Gene Expression Regulation, Developmental/*genetics MH - Male MH - Nerve Growth Factor/genetics MH - Neurons/cytology/*metabolism MH - Neurotrophin 3/genetics MH - RNA, Messenger/metabolism MH - Rats MH - Rats, Wistar MH - Receptor, trkB/genetics MH - Sex Characteristics MH - Sex Differentiation/genetics MH - Time Factors MH - Up-Regulation/genetics MH - Ventromedial Hypothalamic Nucleus/embryology/growth & development/*metabolism EDAT- 2003/06/26 05:00 MHDA- 2003/09/06 05:00 CRDT- 2003/06/26 05:00 PHST- 2003/06/26 05:00 [pubmed] PHST- 2003/09/06 05:00 [medline] PHST- 2003/06/26 05:00 [entrez] AID - S0169328X03001840 [pii] AID - 10.1016/s0169-328x(03)00184-0 [doi] PST - ppublish SO - Brain Res Mol Brain Res. 2003 Jul 4;115(1):69-77. doi: 10.1016/s0169-328x(03)00184-0.