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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...
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Related Experiment Video

Updated: Mar 6, 2026

Preparation of Small RNA Libraries for Sequencing from Early Mouse Embryos
08:37

Preparation of Small RNA Libraries for Sequencing from Early Mouse Embryos

Published on: October 9, 2020

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A Functional MicroRNA Screening Method for Organ Morphogenesis.

Ivan T Rebustini1

  • 1Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.

Current Protocols in Cell Biology
|March 4, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method using peptide-based nanoparticles to effectively assess microRNA function in developing organs. This technique improves targeting efficiency and reduces off-target effects for better understanding of organ morphogenesis.

Keywords:
functional screeningmicroRNAorgan morphogenesis

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Biotechnology

Background:

  • MicroRNAs (miRNAs) play crucial roles in regulating organ development and morphogenesis.
  • Existing methods for assessing miRNA function, such as liposome-mediated transfection of antagomirs and mimics, often suffer from low efficiency and off-target effects.

Purpose of the Study:

  • To develop a more efficient and specific method for assessing miRNA function in explanted embryonic organs.
  • To overcome the limitations of current transfection techniques in studying miRNA roles during organogenesis.

Main Methods:

  • Utilized peptide-based nanoparticles for the delivery of miRNA inhibitors (antagomirs) and activators (mimics) into explanted mouse embryonic organs.
  • Compared the efficiency and specificity of nanoparticle-mediated delivery with traditional liposome-based methods.

Main Results:

  • Peptide-based nanoparticles significantly increased the efficiency of functional miRNA targeting in explanted organs.
  • The nanoparticle method demonstrated decreased off-target effects compared to liposome-based delivery.
  • The method is applicable to various embryonic organs suitable for explantation.

Conclusions:

  • Peptide-based nanoparticles offer a superior alternative for assessing miRNA function during organ morphogenesis.
  • This approach enables more efficient and accurate prioritization of miRNAs for subsequent in vivo genetic studies.
  • The developed method advances the study of miRNA-mediated regulation in developmental processes.