PMID- 21639804 OWN - NLM STAT- MEDLINE DCOM- 20110823 LR - 20110606 IS - 0334-1763 (Print) IS - 0334-1763 (Linking) VI - 22 IP - 3 DP - 2011 TI - BDNF-TrkB signalling in fear learning: from genetics to neural networks. PG - 303-15 LID - 10.1515/RNS.2011.031 [doi] AB - Discovering the basic mechanisms in fear encoding and expression is important in many fields, including psychology, sociology, medicine, and neuroscience. Effective treatment for fear-based pathology depends on understanding how fear is learned and regulated. Among the molecular systems required for fear learning and amygdalar synaptic plasticity, brain derived neurtrophic factor (BDNF) and its high affinity receptor Ntrk2/TrkB have been shown to play essential roles. Therefore, we will focus this review on three main aspects; first of all, the impact of Bdnf polymorphism on fear related characteristics in humans and animal models. Secondly, we will discuss BDNF-TrkB activity regulation by epigenetic, transcriptional and post-translational events, and finally we will discuss TrkB-BDNF signalling in fear learning. BDNF-TrkB and the signalling activated in this particular form of plasticity are becoming crucial players in fear learning and memory thus highlighting these molecules as potential therapeutic targets in fear-related pathologies. FAU - Musumeci, Grabiele AU - Musumeci G AD - Fondazione Santa Lucia, Instituto di Ricovero e Cura a Carattere Scientifico, I-00179 Rome, Italy. FAU - Minichiello, Liliana AU - Minichiello L LA - eng PT - Journal Article PT - Review PL - Germany TA - Rev Neurosci JT - Reviews in the neurosciences JID - 8711016 RN - 0 (Brain-Derived Neurotrophic Factor) RN - EC 2.7.10.1 (Receptor, trkB) SB - IM MH - Amygdala/*cytology/metabolism MH - Animals MH - Behavior, Animal MH - Brain-Derived Neurotrophic Factor/genetics/*metabolism MH - Epigenomics MH - *Fear MH - Humans MH - Learning/*physiology MH - Receptor, trkB/genetics/*metabolism MH - Signal Transduction/*physiology EDAT- 2011/06/07 06:00 MHDA- 2011/08/24 06:00 CRDT- 2011/06/07 06:00 PHST- 2011/06/07 06:00 [entrez] PHST- 2011/06/07 06:00 [pubmed] PHST- 2011/08/24 06:00 [medline] AID - 10.1515/RNS.2011.031 [doi] PST - ppublish SO - Rev Neurosci. 2011;22(3):303-15. doi: 10.1515/RNS.2011.031.