| First Author | El Gaamouch F | Year | 2012 |
| Journal | J Neurosci | Volume | 32 |
| Issue | 31 | Pages | 10767-79 |
| PubMed ID | 22855824 | Mgi Jnum | J:186623 |
| Mgi Id | MGI:5432815 | Doi | 10.1523/JNEUROSCI.5622-11.2012 |
| Citation | El Gaamouch F, et al. (2012) Interaction Between alphaCaMKII and GluN2B Controls ERK-Dependent Plasticity. J Neurosci 32(31):10767-79 |
| abstractText | Understanding how brief synaptic events can lead to sustained changes in synaptic structure and strength is a necessary step in solving the rules governing learning and memory. Activation of ERK1/2 (extracellular signal regulated protein kinase 1/2) plays a key role in the control of functional and structural synaptic plasticity. One of the triggering events that activates ERK1/2 cascade is an NMDA receptor (NMDAR)-dependent rise in free intracellular Ca(2+) concentration. However the mechanism by which a short-lasting rise in Ca(2+) concentration is transduced into long-lasting ERK1/2-dependent plasticity remains unknown. Here we demonstrate that although synaptic activation in mouse cultured cortical neurons induces intracellular Ca(2+) elevation via both GluN2A and GluN2B-containing NMDARs, only GluN2B-containing NMDAR activation leads to a long-lasting ERK1/2 phosphorylation. We show that alphaCaMKII, but not betaCaMKII, is critically involved in this GluN2B-dependent activation of ERK1/2 signaling, through a direct interaction between GluN2B and alphaCaMKII. We then show that interfering with GluN2B/alphaCaMKII interaction prevents synaptic activity from inducing ERK-dependent increases in synaptic AMPA receptors and spine volume. Thus, in a developing circuit model, the brief activity of synaptic GluN2B-containing receptors and the interaction between GluN2B and alphaCaMKII have a role in long-term plasticity via the control of ERK1/2 signaling. Our findings suggest that the roles that these major molecular elements have in learning and memory may operate through a common pathway. |
