title: Differential involvement of brain-derived neurotrophic factor in reconsolidation and consolidation of conditioned taste aversion memory.
abstract: Consolidated memory can re-enter states of transient instability following reactivation, which is referred to as reconsolidation, and the exact molecular mechanisms underlying this process remain unexplored. Brain-derived neurotrophic factor (BDNF) plays a critical role in synaptic plasticity and memory processes. We have recently observed that BDNF signaling in the central nuclei of the amygdala (CeA) and insular cortex (IC) was involved in the consolidation of conditioned taste aversion (CTA) memory. However, whether BDNF in the CeA or IC is required for memory reconsolidation is still unclear. In the present study, using a CTA memory paradigm, we observed increased BDNF expression in the IC but not in the CeA during CTA reconsolidation. We further determined that BDNF synthesis and signaling in the IC but not in the CeA was required for memory reconsolidation. The differential, spatial-specific roles of BDNF in memory consolidation and reconsolidation suggest that dissociative molecular mechanisms underlie reconsolidation and consolidation, which might provide novel targets for manipulating newly encoded and reactivated memories without causing universal amnesia.
authors.affiliation: Department of Neurobiology, Shandong Provincial Key Laboratory of Mental Disorders, School of Medicine, Shandong University, Jinan, Shandong, People's Republic of China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Wang
authors.forename: Tian-Yi
authors.initials: TY
authors.lastname: Zhang
authors.forename: Jian
authors.initials: J
authors.lastname: Xin
authors.forename: Ting
authors.initials: T
authors.lastname: Li
authors.forename: Hui
authors.initials: H
authors.lastname: Yu
authors.forename: Na
authors.initials: N
authors.lastname: Li
authors.forename: Zhe-Yu
authors.initials: ZY
authors.lastname: Chen
mesh_terms: D000818:Animals; D019208:Brain-Derived Neurotrophic Factor / Q000378:metabolism / Q000502:physiology; D002540:Cerebral Cortex / Q000378:metabolism / Q000502:physiology; D003214:Conditioning, Classical / Q000502:physiology; D008568:Memory / Q000502:physiology*; D051381:Rats; D017208:Rats, Wistar; D013569:Synapses / Q000378:metabolism / Q000502:physiology; D013649:Taste / Q000502:physiology*
chemical_list: D019208:Brain-Derived Neurotrophic Factor