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Related Concept Videos

Overview of Exosomes01:36

Overview of Exosomes

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Exosomes are stable, lipid bilayer-enclosed vesicles capable of crossing biological barriers. They can carry a wide range of molecules required for intercellular communication. Once exosomes are released from the cell where they originated, they enter a recipient cell through various pathways such as fusion, receptor-mediated endocytosis, macropinocytosis, and phagocytosis.
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Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
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In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing...
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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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RNA-seq03:21

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RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases. 
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Related Experiment Video

Updated: Aug 8, 2025

Preparation of Exosomes for siRNA Delivery to Cancer Cells
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Exosome-Based Carrier for RNA Delivery: Progress and Challenges.

Yicheng Lu1, Wei Huang2, Meng Li1

  • 1Institute of Pharmacology and Toxicology of Academy of Military Medical Sciences, 27 Taiping Road, Haidian District, Beijing 100089, China.

Pharmaceutics
|February 25, 2023
PubMed
Summary

Exosomes offer a safe and effective way to deliver RNA-based therapies for genetic diseases. This review highlights exosome-mediated RNA delivery strategies and their potential in treating various conditions.

Keywords:
RNA loadingRNA therapychallengesdrug deliveryexosomesprogresstargeting

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Area of Science:

  • Biotechnology
  • Nanomedicine
  • Molecular Therapy

Background:

  • RNA-based drugs show promise for genetic defect treatment.
  • Safe and effective delivery systems are crucial for RNA therapy clinical application.
  • Exosomes are explored as natural nanocarriers for drug delivery due to their favorable properties.

Purpose of the Study:

  • To review and summarize strategies and applications of exosome-mediated RNA therapy.
  • To elucidate the challenges associated with using exosomes for RNA drug delivery.

Main Methods:

  • Literature review of exosome-mediated RNA therapy strategies.
  • Analysis of exosome loading and targeting approaches.
  • Summary of current applications and challenges in the field.

Main Results:

  • Exosomes can be loaded with RNA molecules for targeted delivery.
  • Exosome-mediated RNA therapy demonstrates potential in treating cancer, CNS disorders, and COVID-19.
  • Technological and logistical challenges remain for exosome-based RNA delivery.

Conclusions:

  • Exosomes represent a viable platform for RNA drug delivery.
  • Further research is needed to overcome existing challenges for clinical translation.
  • Exosome-mediated RNA therapy holds significant therapeutic potential across diverse diseases.