A groundbreaking study published today in the Neuroscience Magazinesheds new light on how brain cells transmit critical information from their limbs to their core, leading to the activation of genes essential for learning and memory.
Researchers have identified a key pathway that links the way neurons send signals to each other, or synaptic activity, with the expression of genes necessary for long-term changes in the brain, providing crucial information about the molecular processes underlying memory formation.
“These findings illuminate a critical mechanism that connects local synaptic activity to broader changes in gene expression necessary for learning and memory,” said Mark Dell’Acqua, professor of pharmacology at the University of Colorado Anschutz Medical Campus. and lead author of the study. “This paper is primarily a basic science finding of a fundamental process of what nerve cells do. Understanding this relay system not only improves our understanding of brain function but could also better inform therapeutic treatments for cognitive disorders.”
The nucleus where genes that modify neuronal function are controlled is located at a great distance from where neurons receive information from their synapses, which are located on distant dendrites that extend like branches from the trunk of a tree. This research focuses on cAMP response element binding protein (CREB), a transcription factor known to regulate genes vital for dynamic changes at synapses, which is essential for neuronal communication. Despite the well-documented role of CREB in supporting learning and memory, the exact mechanisms leading to CREB activation during neuronal activity remain unclear.
Using advanced microscopy techniques, graduate student Katlin Zent from Dr. Dell’Acqua’s research group revealed a crucial relay mechanism involving the activation of receptors and ion channels that generate calcium signals that rapidly communicate from branch synapses. remote dendrites to the nucleus in the neuronal cell body. .
“In the future, this research will allow us to better examine how these pathways are used in different disease states,” Dell’Acqua said. “We were able to see exactly which parts of this new mechanism are interfered with and where, giving us a better idea of how this pathway that affects learning and memory is affected. This research highlights potential targets for interventions targeting conditions such as Alzheimer’s disease and other memory disorders.