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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...
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 ends...
mRNA Stability and Gene Expression02:51

mRNA Stability and Gene Expression

The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
mRNA Stability and Gene Expression02:51

mRNA Stability and Gene Expression

The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Regulation of Expression at Multiple Steps01:23

Regulation of Expression at Multiple Steps

The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...

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Related Experiment Video

Updated: May 25, 2026

Biotin-based Pulldown Assay to Validate mRNA Targets of Cellular miRNAs
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Biotin-based Pulldown Assay to Validate mRNA Targets of Cellular miRNAs

Published on: June 12, 2018

Modeling Equilibrium of microRNA Expression.

Lawrence W C Chan1

  • 1Department of Health Technology and Informatics, The Hong Kong Polytechnic University Hong Kong, China.

Frontiers in Genetics
|February 4, 2012
PubMed
Summary

Dysregulated microRNAs (miRNAs) are linked to cancer. Mathematical models simulate miRNA network dynamics, aiding understanding of their regulatory mechanisms in normal versus impaired cells.

Area of Science:

  • Molecular Biology
  • Bioinformatics
  • Systems Biology

Background:

  • MicroRNAs (miRNAs) are crucial non-coding RNAs involved in gene regulation.
  • Aberrant miRNA expression is a hallmark of various cancers.
  • Cellular function is influenced by the steady-state concentration of miRNAs.

Purpose of the Study:

  • To explore the interactions between miRNAs, transcription factors, and target genes.
  • To understand the equilibrium dynamics of miRNA regulation.
  • To apply mathematical modeling for deciphering miRNA regulatory mechanisms.

Main Methods:

  • Network analysis and prediction algorithms.
  • Mathematical modeling of feedback loop dynamics.
  • Simulation of miRNA regulatory networks.
Keywords:
equilibriumfeedbackmicroRNAregulation

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Lung microRNA Profiling Across the Estrous Cycle in Ozone-exposed Mice
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Lung microRNA Profiling Across the Estrous Cycle in Ozone-exposed Mice

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Genome-wide Screen for miRNA Targets Using the MISSION Target ID Library
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Genome-wide Screen for miRNA Targets Using the MISSION Target ID Library

Published on: April 6, 2012

Related Experiment Videos

Last Updated: May 25, 2026

Biotin-based Pulldown Assay to Validate mRNA Targets of Cellular miRNAs
11:00

Biotin-based Pulldown Assay to Validate mRNA Targets of Cellular miRNAs

Published on: June 12, 2018

Lung microRNA Profiling Across the Estrous Cycle in Ozone-exposed Mice
07:07

Lung microRNA Profiling Across the Estrous Cycle in Ozone-exposed Mice

Published on: January 7, 2019

Genome-wide Screen for miRNA Targets Using the MISSION Target ID Library
08:40

Genome-wide Screen for miRNA Targets Using the MISSION Target ID Library

Published on: April 6, 2012

Main Results:

  • Identified key interactions within miRNA regulatory networks.
  • Simulated the dynamic behavior of miRNA feedback loops.
  • Provided insights into the mechanisms of miRNA dysregulation in cancer.

Conclusions:

  • Mathematical modeling is a powerful tool for understanding miRNA regulation.
  • Network analysis aids in visualizing complex miRNA interactions.
  • Deciphering miRNA mechanisms can lead to novel cancer diagnostics and therapeutics.