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Related Concept Videos

MicroRNAs01:22

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
MicroRNAs01:22

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
MicroRNAs01:22

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
Higher Mental Functions of Brain: Learning and Memory01:26

Higher Mental Functions of Brain: Learning and Memory

Memory is one of the most vital higher mental functions of the brain. Memory is closely related to learning because it enables us to retain information and experiences from our past to use them in our present life. It also helps us to remember facts, events, and skills, such as riding a bike or swimming. There are two types of memory — declarative memory, which involves memorizing facts or events, and procedural memory, which enables us to remember how to do something like writing or playing an...
Long-Term Memory01:18

Long-Term Memory

Long-term memory is a relatively permanent type of memory, capable of storing vast amounts of information over extended periods. Its storage capacity is generally considered unlimited.
Long-term memory can be categorized into two primary types: explicit and implicit memory. Explicit memory, also known as declarative memory, involves the conscious recollection of information that we deliberately try to remember, recall, and articulate. This type of memory encompasses specific facts, events, and...
Role of Neurotransmitters in Memory01:23

Role of Neurotransmitters in Memory

Neurotransmitters are integral to the brain's communication system, enabling neurons to transmit signals across synapses. This chemical exchange underpins various cognitive functions, including memory processes. The role of neurotransmitters in memory is multifaceted, influencing the encoding, consolidation, and retrieval of memories through their action on different neural circuits.
 Glutamate and Synaptic Plasticity
Glutamate, the brain's main excitatory neurotransmitter, is critical for...

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Stereotactic Injection of MicroRNA-expressing Lentiviruses to the Mouse Hippocampus CA1 Region and Assessment of the Behavioral Outcome
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The microRNA contribution to learning and memory.

Witold Konopka1, Günther Schütz, Leszek Kaczmarek

  • 1Molecular Biology of the Cell I, German Cancer Research Center (DKFZ) Heidelberg, Germany. w.konopka@dkfz.de

The Neuroscientist : a Review Journal Bringing Neurobiology, Neurology and Psychiatry
|July 8, 2011
PubMed
Summary

MicroRNAs regulate memory formation by controlling protein synthesis in neurons. These small RNA molecules suppress messenger RNA until needed, enabling selective synapse rebuilding essential for long-term memory.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • Learning and memory involve neural circuit plasticity, where synaptic connections are modified.
  • Long-term memory formation is linked to de novo protein synthesis, unlike short-term memory.
  • Local protein translation in dendrites is crucial for targeted synaptic modification.

Purpose of the Study:

  • To discuss the role of microRNAs in regulating memory formation and endurance.
  • To highlight microRNAs as potential regulators of synaptic plasticity and memory consolidation.

Main Methods:

  • Review of current literature on microRNA function in neural systems.
  • Analysis of molecular mechanisms underlying memory consolidation.
  • Discussion of RNA-induced silencing complex (RISC) pathway in neurons.

Main Results:

  • MicroRNAs act as suppressors of messenger RNA (mRNA) translation.
  • This suppression allows for the precise timing of protein synthesis required for memory.
  • MicroRNAs enable selective rebuilding of activated synapses, contributing to memory endurance.

Conclusions:

  • MicroRNAs play a critical role in regulating protein synthesis necessary for memory formation.
  • These non-coding RNAs are key players in synaptic plasticity and long-term memory.
  • MicroRNAs are essential regulators of memory endurance and neuronal function.