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Related Concept Videos

MicroRNAs01:22

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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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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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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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Related Experiment Video

Updated: Feb 22, 2026

In ovo Expression of MicroRNA in Ventral Chick Midbrain
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Published on: September 16, 2013

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MicroRNA Signaling in Embryo Development.

Nicole Gross1, Jenna Kropp2, Hasan Khatib3

  • 1Department of Animal Sciences, University of Wisconsin-Madison, Madison, WI 53706, USA. ngross2@wisc.edu.

Biology
|September 15, 2017
PubMed
Summary
This summary is machine-generated.

MicroRNAs (miRNAs) are crucial for embryonic development and are packaged into extracellular vesicles for transport. These vesicles mediate cell-to-cell communication, playing a key role in early development and implantation.

Keywords:
embryoexosomeextracellular vesicleimplantationmiRNAoocytesignalingsperm

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Area of Science:

  • Reproductive Biology
  • Molecular Biology
  • Developmental Biology

Background:

  • MicroRNAs (miRNAs) are vital for embryonic development and gametogenesis.
  • Embryos secrete miRNAs into the extracellular environment during preimplantation.
  • Extracellular vesicles (EVs), including exosomes, package and transport miRNAs in biological fluids.

Purpose of the Study:

  • To review the role of miRNAs in molecular signaling during early development.
  • To discuss the transport mechanisms of miRNAs during embryo development and implantation.

Main Methods:

  • Literature review of studies on miRNA expression and function.
  • Analysis of research on extracellular vesicle biogenesis and cargo.
  • Synthesis of findings on miRNA-mediated communication in reproduction.

Main Results:

  • miRNAs are secreted by embryos and circulate in bodily fluids.
  • Extracellular vesicles ensure stable transport of miRNAs.
  • EV-derived miRNAs in reproductive fluids facilitate maternal-conceptus communication.

Conclusions:

  • miRNAs packaged in EVs are key mediators of cell-to-cell communication.
  • miRNA transport via EVs is critical for successful embryonic development and implantation.
  • Further research into EV-miRNAs can elucidate reproductive signaling pathways.