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Related Concept Videos

MicroRNAs01:22

MicroRNAs

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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...
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RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
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RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
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Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
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Detection of transcriptome-wide microRNA-target interactions in single cells with agoTRIBE.

Vaishnovi Sekar1, Emilio Mármol-Sánchez1,2, Panagiotis Kalogeropoulos1

  • 1Science for Life Laboratory, Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden.

Nature Biotechnology
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Summary

We developed agoTRIBE, a novel method to detect microRNA (miRNA) targets in single cells. This technique overcomes previous limitations, enabling transcriptome-wide identification of functional miRNA targets efficiently.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • MicroRNAs (miRNAs) are key regulators of gene expression, influencing diverse biological processes.
  • Identifying miRNA targets is crucial for understanding gene regulation but current methods are labor-intensive and require large cell populations.

Purpose of the Study:

  • To develop a sensitive, single-cell method for transcriptome-wide identification of microRNA targets.
  • To overcome the limitations of existing laborious techniques for miRNA target detection.

Main Methods:

  • Fusion of Argonaute2 (Ago2) with the RNA editing domain of ADAR2 to create the agoTRIBE system.
  • Detection of miRNA-guided A>I RNA editing events using single-cell RNA sequencing.
  • Validation of identified targets through evolutionary sequence conservation analysis.

Main Results:

  • agoTRIBE successfully identifies functional microRNA targets at the single-cell level.
  • The method reveals differential microRNA targeting patterns across the cell cycle.
  • agoTRIBE enables transcriptome-wide RNA abundance measurements and deconvolution of miRNA targeting in complex tissues.

Conclusions:

  • agoTRIBE is a powerful new tool for high-throughput microRNA target identification in single cells.
  • This method facilitates the study of microRNA dynamics and interactions within complex biological systems.
  • agoTRIBE advances our understanding of microRNA-mediated gene regulation at an unprecedented resolution.