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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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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...
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Experimental RNAi02:15

Experimental RNAi

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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 Interference01:23

RNA Interference

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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.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
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siRNA - Small Interfering RNAs02:30

siRNA - Small Interfering RNAs

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Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
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Microorganisms in Medicine and Therapeutics01:29

Microorganisms in Medicine and Therapeutics

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Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
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Updated: Nov 19, 2025

A Simple Alternative to Stereotactic Injection for Brain Specific Knockdown of miRNA
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A Simple Alternative to Stereotactic Injection for Brain Specific Knockdown of miRNA

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Recent Advances in miRNA Delivery Systems.

Ishani Dasgupta1, Anushila Chatterjee2

  • 1Horae Gene Therapy Center, Department of Pediatrics, University of Massachusetts Medical School, Worcester, MA 01605, USA.

Methods and Protocols
|January 27, 2021
PubMed
Summary
This summary is machine-generated.

MicroRNAs (miRNAs) regulate gene expression and are implicated in diseases. Effective delivery systems are crucial for developing miRNA-based therapeutics, with viral and non-viral methods offering distinct advantages and disadvantages.

Keywords:
miRNAmiRNA deliverymiRNA therapeuticsnon-viral vectorsviral vectors

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biotechnology

Background:

  • MicroRNAs (miRNAs) are short, non-coding RNA molecules regulating gene expression post-transcriptionally.
  • miRNA dysregulation is linked to numerous human pathologies, driving therapeutic interest.
  • miRNA mimics and anti-miRNAs offer strategies to modulate miRNA levels for disease treatment.

Purpose of the Study:

  • To review current viral and non-viral delivery systems for miRNA-based therapeutics.
  • To analyze the strengths and weaknesses of existing miRNA delivery platforms.
  • To provide perspective on optimizing these systems for improved therapeutic outcomes.

Main Methods:

  • Literature review of state-of-the-art viral miRNA delivery systems.
  • Literature review of state-of-the-art non-viral miRNA delivery systems.
  • Comparative analysis of the efficacy and safety profiles of different delivery vectors.

Main Results:

  • Viral delivery systems offer high transduction efficiency but face challenges with immunogenicity and insertional mutagenesis.
  • Non-viral delivery systems provide improved safety profiles but often exhibit lower transfection efficiency and stability.
  • Current delivery systems require further optimization to ensure proficient and safe delivery of miRNA therapeutics.

Conclusions:

  • The choice of delivery system significantly impacts the clinical success of miRNA-based therapeutics.
  • Addressing the limitations of current viral and non-viral systems is essential for advancing miRNA-based therapies.
  • Future research should focus on developing innovative delivery strategies to enhance the therapeutic potential of miRNAs.