Ryang Hi Kim

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BACKGROUND Memory retrieval is not a passive process. Recent studies have shown that reactivated memory is destabilized and then restabilized through gene expression-dependent reconsolidation. Molecular studies on the regulation of memory stability after retrieval have focused almost exclusively on fear memory, especially on the restabilization process of(More)
Adult hippocampal neurogenesis has been suggested to play modulatory roles in learning and memory. Importantly, previous studies have shown that newborn neurons in the adult hippocampus are integrated into the dentate gyrus circuit and are recruited more efficiently into the hippocampal memory trace of mice when they become 3 weeks old. Interestingly, a(More)
CREB is a pivotal mediator of activity-regulated gene transcription that underlies memory formation and allocation. The contribution of a key CREB cofactor, CREB-regulated transcription coactivator 1 (CRTC1), has, however, remained elusive. Here we show that several constitutive kinase pathways and an activity-regulated phosphatase, calcineurin, converge to(More)
During learning and memory, it has been suggested that the coordinated electrical activity of hippocampal neurons translates information about the external environment into internal neuronal representations, which then are stored initially within the hippocampus and subsequently into other areas of the brain. A widely held hypothesis posits that synaptic(More)
In the field of molecular and cellular neuroscience, it is not a trivial task to see the forest for the trees, where numerous, and seemingly independent, molecules often work in concert to control critical steps of synaptic plasticity and signalling. Here, we will first summarize our current knowledge on essential activity-dependent transcription factors(More)
Neurons express new gene transcripts and proteins upon receiving synaptic inputs, and these events are essential for achieving proper neuronal wiring, adequate synaptic plasticity, and updatable memory. However, the biological impact of new gene expression on input-specific synaptic potentiation remains largely elusive, in part because the cell biological(More)
BACKGROUND Prealbumin, a sensitive marker for protein-energy status, is also known as an independent risk factor for mortality in hemodialysis patients. We investigated the impact of prealbumin on survival in incident peritoneal dialysis (PD) patients. METHODS In total, 136 incident PD patients (mean age, 53.0 ± 15.8 years) between 2002 and 2007 were(More)
Odour information induces various innate responses that are critical to the survival of the individual and for the species. An axon guidance molecule, Neuropilin 2 (Nrp2), is known to mediate targeting of olfactory sensory neurons (primary neurons), to the posteroventral main olfactory bulb (PV MOB) in mice. Here we report that Nrp2-positive (Nrp2+) mitral(More)
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