PMID- 25981175 OWN - NLM STAT- MEDLINE DCOM- 20160418 LR - 20150716 IS - 1365-2826 (Electronic) IS - 0953-8194 (Linking) VI - 27 IP - 8 DP - 2015 Aug TI - Neonatal Treatment with a Pegylated Leptin Antagonist Induces Sexually Dimorphic Effects on Neurones and Glial Cells, and on Markers of Synaptic Plasticity in the Developing Rat Hippocampal Formation. PG - 658-69 LID - 10.1111/jne.12294 [doi] AB - The present study aimed to better understand the role of the neonatal leptin surge, which peaks on postnatal day (PND)9-10, on the development of the hippocampal formation. Accordingly, male and female rats were administered with a pegylated leptin antagonist on PND9 and the expression of neurones, glial cells and diverse markers of synaptic plasticity was then analysed by immunohistochemistry in the hippocampal formation. Antagonism of the actions of leptin at this specific postnatal stage altered the number of glial fibrillary acidic protein positive cells, and also affected type 1 cannabinoid receptors, synaptophysin and brain-derived neurotrophic factor (BDNF), with the latter effect being sexually dimorphic. The results indicate that the physiological leptin surge occurring around PND 9-10 is critical for hippocampal formation development and that the dynamics of leptin activity might be different in males and females. The data obtained also suggest that some but not all the previously reported effects of maternal deprivation on hippocampal formation development (which markedly reduces leptin levels at PND 9-10) might be mediated by leptin deficiency in these animals. CI - (c) 2015 British Society for Neuroendocrinology. FAU - Lopez-Gallardo, M AU - Lopez-Gallardo M AD - Department of Physiology, Faculty of Medicine, Universidad Complutense, Madrid, Spain. FAU - Anton-Fernandez, A AU - Anton-Fernandez A AD - Department of Physiology, Faculty of Medicine, Universidad Complutense, Madrid, Spain. FAU - Llorente, R AU - Llorente R AD - Department of Physiology (Animal Physiology II), Faculty of Biology, Universidad Complutense, Madrid, Spain. FAU - Mela, V AU - Mela V AD - Department of Physiology (Animal Physiology II), Faculty of Biology, Universidad Complutense, Madrid, Spain. FAU - Llorente-Berzal, A AU - Llorente-Berzal A AD - Department of Physiology (Animal Physiology II), Faculty of Biology, Universidad Complutense, Madrid, Spain. FAU - Prada, C AU - Prada C AD - Department of Physiology, Faculty of Medicine, Universidad Complutense, Madrid, Spain. FAU - Viveros, M P AU - Viveros MP AD - Department of Physiology (Animal Physiology II), Faculty of Biology, Universidad Complutense, Madrid, Spain. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Neuroendocrinol JT - Journal of neuroendocrinology JID - 8913461 RN - 0 (Biomarkers) RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Glial Fibrillary Acidic Protein) RN - 0 (Leptin) RN - 0 (Receptor, Cannabinoid, CB1) RN - 0 (Synaptophysin) SB - IM MH - Animals MH - Animals, Newborn MH - Biomarkers/*metabolism MH - Brain-Derived Neurotrophic Factor/metabolism MH - Female MH - Glial Fibrillary Acidic Protein/metabolism MH - Hippocampus/*drug effects/growth & development/metabolism MH - Leptin/*antagonists & inhibitors/physiology MH - Male MH - Neuroglia/*metabolism MH - Neuronal Plasticity/*drug effects/physiology MH - Neurons/*metabolism MH - Rats MH - Receptor, Cannabinoid, CB1/metabolism MH - *Sex Characteristics MH - Synaptophysin/metabolism OTO - NOTNLM OT - BDNF OT - astrocytes OT - cannabinoid receptors OT - developing hippocampus OT - neonatal leptin OT - synaptophysin EDAT- 2015/05/20 06:00 MHDA- 2016/04/19 06:00 CRDT- 2015/05/19 06:00 PHST- 2015/12/03 00:00 [received] PHST- 2015/04/04 00:00 [revised] PHST- 2015/04/11 00:00 [accepted] PHST- 2015/05/19 06:00 [entrez] PHST- 2015/05/20 06:00 [pubmed] PHST- 2016/04/19 06:00 [medline] AID - 10.1111/jne.12294 [doi] PST - ppublish SO - J Neuroendocrinol. 2015 Aug;27(8):658-69. doi: 10.1111/jne.12294.