A time-dependent role for the transcription factor CREB in neuronal allocation to an engram underlying a fear memory revealed using a novel in vivo optogenetic tool to modulate CREB function
| Autor: | Jung Hoon Jung, Asim J. Rashid, G. Andrew Woolley, Sheena A. Josselyn, Brandon J. Walters, Paul W. Frankland, Albert Park, Sungmo Park, Alexander D. Jacob, Jocelyn M.H. Lau |
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| Rok vydání: | 2019 |
| Předmět: |
Population
Engram Biology Optogenetics CREB Amygdala Article 03 medical and health sciences Mice 0302 clinical medicine Memory medicine Premovement neuronal activity Animals education Transcription factor Pharmacology Neurons education.field_of_study Basolateral Nuclear Complex Fear 030227 psychiatry Psychiatry and Mental health medicine.anatomical_structure biology.protein Neuroscience 030217 neurology & neurosurgery Function (biology) |
| Zdroj: | Neuropsychopharmacology |
| ISSN: | 1740-634X |
| Popis: | The internal representation of an experience is thought to be encoded by long-lasting physical changes to the brain (“engrams”) . Previously, we and others showed within the lateral amygdala (LA), a region critical for auditory conditioned fear, eligible neurons compete against one other for allocation to an engram. Neurons with relatively higher function of the transcription factor CREB were more likely to be allocated to the engram. In these studies, though, CREB function was artificially increased for several days before training. Precisely when increased CREB function is important for allocation remains an unanswered question. Here, we took advantage of a novel optogenetic tool (opto-DN-CREB) to gain spatial and temporal control of CREB function in freely behaving mice. We found increasing CREB function in a small, random population of LA principal neurons in the minutes, but not 24 h, before training was sufficient to enhance memory, likely because these neurons were preferentially allocated to the underlying engram. However, similarly increasing CREB activity in a small population of random LA neurons immediately after training disrupted subsequent memory retrieval, likely by disrupting the precise spatial and temporal patterns of offline post-training neuronal activity and/or function required for consolidation. These findings reveal the importance of the timing of CREB activity in regulating allocation and subsequent memory retrieval, and further, highlight the potential of optogenetic approaches to control protein function with temporal specificity in behaving animals. |
| Databáze: | OpenAIRE |
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