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Related Concept Videos

siRNA - Small Interfering RNAs02:30

siRNA - Small Interfering RNAs

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 ATP-dependent...
Modified-Release Drug Delivery Systems: Site-Targeted01:24

Modified-Release Drug Delivery Systems: Site-Targeted

Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.
Experimental RNAi02:15

Experimental RNAi

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...
RNA Interference01:23

RNA Interference

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...
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...

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Related Experiment Video

Updated: May 31, 2026

Rapid Antibody Glycoengineering in Chinese Hamster Ovary Cells
06:53

Rapid Antibody Glycoengineering in Chinese Hamster Ovary Cells

Published on: June 2, 2022

Antibody targeted siRNA delivery.

Masoud M Toloue1, Lance P Ford

  • 1Bioo Scientific Corporation, 78744, Austin, TX, USA. mtoloue@biooscientific.com

Methods in Molecular Biology (Clifton, N.J.)
|July 13, 2011
PubMed
Summary

Antibody-based delivery agents enable targeted delivery of small interfering RNA (siRNA) for gene silencing therapies. This method overcomes a key hurdle for in vivo RNA interference (RNAi) applications.

Area of Science:

  • Molecular Biology
  • Biotechnology
  • Drug Delivery

Background:

  • RNA interference (RNAi) is a powerful gene silencing technique.
  • Effective in vivo delivery of small interfering RNA (siRNA) and microRNA (miRNA) to target cells remains a significant challenge for therapeutic applications.
  • Commercial success of RNAi therapies depends on innovative delivery systems.

Purpose of the Study:

  • To develop antibody-based delivery agents for targeted in vivo delivery of siRNA.
  • To overcome limitations in current RNAi delivery methods for therapeutic applications.

Main Methods:

  • Antibodies targeting specific cell surface receptors were used.
  • Modified siRNAs were conjugated to antibody complexes via RNA carrier proteins.
  • Receptor-mediated endocytosis was utilized for cellular uptake in cultured cells and animal models.

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Delivery of Therapeutic siRNA to the CNS Using Cationic and Anionic Liposomes

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Last Updated: May 31, 2026

Rapid Antibody Glycoengineering in Chinese Hamster Ovary Cells
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Published on: June 2, 2022

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07:36

Analyzing Tumor and Tissue Distribution of Target Antigen Specific Therapeutic Antibody

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Delivery of Therapeutic siRNA to the CNS Using Cationic and Anionic Liposomes
10:33

Delivery of Therapeutic siRNA to the CNS Using Cationic and Anionic Liposomes

Published on: July 23, 2016

  • Labile linking agents facilitated siRNA release post-internalization.
  • Main Results:

    • Antibody-based agents successfully delivered siRNA to specific cell types in vitro and in vivo.
    • The method allows conjugation of any available antibody to siRNA for targeted delivery.
    • Receptor-mediated endocytosis facilitated efficient cellular uptake.

    Conclusions:

    • Antibody-mediated delivery represents a versatile strategy for targeted siRNA delivery.
    • This approach addresses a critical challenge in developing RNAi-based human therapeutics.
    • The developed method offers a flexible platform for utilizing existing antibodies in RNAi delivery systems.