title: Lack of DREAM protein enhances learning and memory and slows brain aging.
abstract: Memory deficits in aging affect millions of people and are often disturbing to those concerned. Dissection of the molecular control of learning and memory is paramount to understand and possibly enhance cognitive functions. Old-age memory loss also has been recently linked to altered Ca(2+) homeostasis. We have previously identified DREAM (downstream regulatory element antagonistic modulator), a member of the neuronal Ca(2+) sensor superfamily of EF-hand proteins, with specific roles in different cell compartments. In the nucleus, DREAM is a Ca(2+)-dependent transcriptional repressor, binding to specific DNA signatures, or interacting with nucleoproteins regulating their transcriptional properties. Also, we and others have shown that dream mutant (dream(-/-)) mice exhibit marked analgesia. Here we report that dream(-/-) mice exhibit markedly enhanced learning and synaptic plasticity related to improved cognition. Mechanistically, DREAM functions as a negative regulator of the key memory factor CREB in a Ca(2+)-dependent manner, and loss of DREAM facilitates CREB-dependent transcription during learning. Intriguingly, 18-month-old dream(-/-) mice display learning and memory capacities similar to young mice. Moreover, loss of DREAM protects from brain degeneration in aging. These data identify the Ca(2+)-regulated "pain gene" DREAM as a novel key regulator of memory and brain aging.
authors.affiliation: División de Neurociencias, Universidad Pablo de Olavide de Sevilla, Carretera de Utrera Km. 1, 41013-Sevilla, Spain.
authors.forename: Angela
authors.initials: A
authors.lastname: Fontán-Lozano
authors.forename: Rocío
authors.initials: R
authors.lastname: Romero-Granados
authors.forename: Yaiza
authors.initials: Y
authors.lastname: del-Pozo-Martín
authors.forename: Irene
authors.initials: I
authors.lastname: Suárez-Pereira
authors.forename: José María
authors.initials: JM
authors.lastname: Delgado-García
authors.forename: Josef M
authors.initials: JM
authors.lastname: Penninger
authors.forename: Angel Manuel
authors.initials: AM
authors.lastname: Carrión
mesh_terms: D000375:Aging / Q000235:genetics / Q000502:physiology*; D000704:Analysis of Variance; D000818:Animals; D015153:Blotting, Western; D002118:Calcium / Q000378:metabolism; D017362:Cyclic AMP Response Element-Binding Protein / Q000378:metabolism; D004247:DNA / Q000378:metabolism; D017931:DNA Primers / Q000235:genetics; D024202:Electrophoretic Mobility Shift Assay; D004594:Electrophysiology; D006624:Hippocampus / Q000502:physiology; D007150:Immunohistochemistry; D051605:Kv Channel-Interacting Proteins / Q000172:deficiency* / Q000235:genetics / Q000378:metabolism; D007858:Learning / Q000502:physiology*; D008568:Memory / Q000502:physiology*; D051379:Mice; D018345:Mice, Knockout; D012097:Repressor Proteins / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: C492004:Creb1 protein, mouse; C496756:Csen protein, mouse; D017362:Cyclic AMP Response Element-Binding Protein; D017931:DNA Primers; D051605:Kv Channel-Interacting Proteins; D012097:Repressor Proteins; D004247:DNA; D002118:Calcium