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Wnt signaling controls multiple biological process, particularly the embryonic development of metazoans. Sustained expression of Wnt signaling components in the mature mammalian CNS and their apparent deregulation in certain neuropathologies suggest that it also plays a part beyond embryonic development to regulate normal brain function. We describe a noncanonical Wnt/Ca2+ signaling cascade that regulates...
• Mature nucleus laminaris (NL) neurons in the avian auditory brainstem respond with one or two action potentials to repetitive synaptic stimulation due to strong expression of low‐voltage‐activated K+ channels (KLVA) and other intrinsic factors.
• We observe early in development, before the onset of hearing, NL neurons respond in similar fashion despite low expression of KLVA channels. At this age,...
Calcium entry through postsynaptic NMDA-Rs and subsequent activation of CaMKII trigger synaptic plasticity in many brain regions. Active CaMKII can bind to NMDA-Rs, but the physiological role of this interaction is not well understood. Here, we test if association between active CaMKII and synaptic NMDA-Rs is required for synaptic plasticity. Switching synaptic NR2B-containing NMDA-Rs that bind CaMKII...
To elucidate mechanisms controlling the number and subunit composition of synaptic NMDA-Rs in hippocampal slice neurons, the NR1, NR2A, and NR2B subunits were optically and electrophysiologically tagged. The NR2 subunit directs delivery of receptors to synapses with different rules controlling NR2A and NR2B. Synaptic incorporation of NR2B-containing receptors is not limited by synaptic transmission...
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