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Related Concept Videos

Other Stress Responses in Bacteria01:30

Other Stress Responses in Bacteria

Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
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...
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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...
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Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
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The stress response system, also known as the fight-or-flight response, is the body's automatic physiological reaction to perceived threats. Hans Selye introduced the concept of General Adaptation Syndrome (GAS) to describe the predictable pattern of changes that occur in response to stress. GAS consists of three sequential stages: alarm, resistance, and exhaustion. This model helps explain how chronic stress can contribute to health problems.
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Measurements of Physiological Stress Responses in C. Elegans
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Measurements of Physiological Stress Responses in C. Elegans

Published on: May 21, 2020

MicroRNA functions in stress responses.

Anthony K L Leung1, Phillip A Sharp

  • 1Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Molecular Cell
|October 23, 2010
PubMed
Summary

MicroRNAs (miRNAs) are short RNAs crucial for cellular stress responses. They regulate gene expression to either restore or reprogram cells, with dysregulation linked to diseases like cancer.

Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • MicroRNAs (miRNAs) are short noncoding RNAs involved in regulating gene expression.
  • Cellular responses to stress involve restoring or reprogramming gene expression patterns.
  • miRNAs play a critical role in mediating these stress responses.

Purpose of the Study:

  • To elucidate the role of microRNAs in cellular stress response mechanisms.
  • To understand how miRNAs modulate gene expression during stress.
  • To explore the link between miRNA dysregulation and chronic diseases.

Main Methods:

  • Analysis of miRNA biogenesis and function under various stress conditions.
  • Investigating the impact of miRNAs on mRNA targets and miRNA-protein complexes.

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CRISPR Gene Editing Tool for MicroRNA Cluster Network Analysis
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CRISPR Gene Editing Tool for MicroRNA Cluster Network Analysis

Published on: April 25, 2022

  • Studying the downstream effects on gene product expression and cellular fate.
  • Main Results:

    • MicroRNAs modulate cellular decisions to restore or reprogram gene expression during stress.
    • Changes in miRNA levels, target mRNA amounts, and miRNA-protein complex activity influence stress responses.
    • Dysregulation of these miRNA-mediated processes is implicated in the development of chronic diseases, including cancer.

    Conclusions:

    • MicroRNAs are key regulators of cellular adaptation to stress.
    • Understanding miRNA-mediated gene regulation is vital for comprehending disease pathogenesis.
    • Targeting miRNA pathways may offer therapeutic strategies for stress-related disorders and cancer.