Brain Proteins May Help You to Preserve Memories

Think of a new longer-term memory as a construction site inside the brain. The brain’s neurons restructure themselves and build or demolish connections with other neurons to store the memory for retrieval when needed.

The neurons can’t do the work without help. Researchers have discovered that these cellular building materials — in this case, sets of proteins — undergo experience-dependent changes while forming short- and long-term memories. The findings are published in eNeuro, an open-access journal of the Society for Neuroscience.

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‘Proteins in brain cells undergo experience-dependent changes while forming short- and long-term memories.’

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It’s a glimpse into the brain’s plasticity, or its ability to adapt and change its structure as we live our lives and accumulate memories.

Additionally, it enlightens future research about how the brain’s enormously complex systems operate. That has potential implications, scientists said, for a better understanding of neurological disorders. Those include Alzheimer’s and amyotrophic lateral sclerosis, known as ALS or Lou Gehrig’s disease.

The connections of these neurons need to be selectively modified to form long-term memory. And for the modification to occur, the neuron needs to send materials from the cell’s soma to its distant synapses.

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Unique packets of proteins are sent, and this cargo of proteins changes over time as memory is encoded. This is an exciting finding. The soma is the main cell body of a neuron where its nucleus resides, while synapses are the place where connections between neurons are built.

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Researchers used a species of sea slug called Aplysia to explore how memories are encoded. The slugs have gigantic neurons compared with those in the human brain, making them easier to study.

A neural mechanism for storing certain memories in slugs is thought to be extremely similar to what occurs in the human brain. Memory, of course, is the essence of what it means to be human.

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Sometimes memories are short-lived, as when we see a stranger’s face at a party and cannot recall it the next day. A simple biochemical change in the brain creates shorter-term memories that are with us for several minutes to a few hours.

However, longer-term memories, bring out the full construction crew that indelibly encodes the brain’s circuitry, especially when the brain is sensitized to a strong event — a car crash, a child’s birth, or the moment someone learns shocking news.

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How the brain accomplishes this has been poorly understood, and even now, it will take much more research to fully decipher the cellular building blocks that form memory.

The material that moves between soma and synapse includes numerous proteins, which are crucial workhorses that drive many of the processes and chemical reactions that allow human cells to function and carry out tasks. Other cellular materials might also change over time. But that will be a topic of future research.

Source-Medindia