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Related Concept Videos

Long-Term Memory01:18

Long-Term Memory

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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.
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A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
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The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
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Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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Memory is categorized into three major systems: sensory memory, short-term memory (STM), and long-term memory (LTM). These systems differ in their capacity and the duration for which they can hold information. Sensory memory captures raw sensory input from the environment, holding it for just a few seconds or less. For example, on hearing a brief, loud sound, like a car horn honking, the sound seems to linger in the mind for a moment even after it stops. This is an instance of sensory memory...
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Production and Visualization of Bacterial Spheroplasts and Protoplasts to Characterize Antimicrobial Peptide Localization
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Antimicrobial peptides modulate long-term memory.

Raquel Barajas-Azpeleta1, Jianping Wu1, Jason Gill1,2

  • 1Stowers Institute for Medical Research, Kansas City, Missouri, United States of America.

Plos Genetics
|October 13, 2018
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Summary
This summary is machine-generated.

Immune peptides Diptericin B and Gram-Negative Bacteria Binding Protein like 3 regulate long-term memory in Drosophila. These antimicrobial peptides, typically for host defense, appear repurposed for nervous system function and memory formation.

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Area of Science:

  • Neuroscience
  • Immunology
  • Genetics

Background:

  • Antimicrobial peptides (AMPs) are crucial for host defense and microbiome regulation.
  • The genetic underpinnings of long-term memory formation are complex and not fully understood.
  • Investigating novel gene functions in memory requires advanced molecular and behavioral techniques.

Purpose of the Study:

  • To identify genes involved in long-term memory formation in Drosophila.
  • To explore the role of immune-related genes in cognitive processes.
  • To understand the potential repurposing of immune molecules in the nervous system.

Main Methods:

  • mRNA sequencing of Drosophila heads after long-term memory behavioral training.
  • Genetic manipulation (deletion and knockdown) of specific immune peptides.
  • Behavioral assays to assess short-term, long-term memory, and instinctive behaviors.

Main Results:

  • Diptericin B (DptB), an antimicrobial peptide, was found to be upregulated after behavioral training.
  • DptB and Gram-Negative Bacteria Binding Protein like 3 (GNBP-like3) were identified as regulators of long-term memory.
  • Specific localization of DptB in the head fat body and GNBP-like3 in neurons was crucial for memory regulation.

Conclusions:

  • Immune peptides can play a significant role in regulating long-term memory in Drosophila.
  • This suggests a potential repurposing of immune system components for neural functions.
  • Findings open new avenues for understanding the interplay between immunity and cognition.