Small Interfering Rna
Small Interfering Rna - Related Videos
08:36
Chitosan/Interfering RNA Nanoparticle Mediated Gene Silencing in Disease Vector Mosquito Larvae
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Cited by 94 •
2015
Here we describe a procedure for inhibiting gene function in disease vector mosquitoes through the use of chitosan/interfering RNA nanoparticles that are ingested by larvae.
02:30
siRNA - Small Interfering RNAs
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2020
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...
04:34
siRNA Reverse Transfection-Based Gene Silencing In Vitro: A Procedure to Deliver Small Interfering RNA in Cultured Cells to Inactivate Target Gene Expression
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2025
In this video, we describe a procedure to perform reverse transfection of siRNA into adipocytes to modulate the expression of a target protein.
02:30
Small interfering RNAs (siRNA)
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2023
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...
01:23
RNA Interference
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2019
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...
FAQs
The RNA-induced silencing complex (RISC) retains one strand of the double-stranded molecule, and that strand supplies the sequence information for recognition. Pairing with a complementary region in a target messenger RNA focuses the response on a selected transcript. This strand-selection step gives RNA interference its sequence-directed character within the cell.
Complementary pairing determines whether the selected transcript can be recognized, while the associated cleavage prevents that messenger RNA from continuing to support protein production. This connection between sequence matching, mRNA cleavage, and reduced translation explains why siRNA can selectively lower expression of an individual gene rather than broadly suppressing protein synthesis throughout the cell.
Unintended gene silencing is a central limitation because the desired reduction in one gene’s expression may not be the only biological effect. For that reason, experiments and therapeutic research must treat selectivity as an important design and interpretation issue. The overview identifies minimizing unintended silencing, along with delivery and stability, as a continuing challenge.
Researchers direct a small interfering RNA-based experiment toward a gene of interest, allowing the intracellular mechanism to reduce its expression. They can then use that suppression to investigate the gene’s role in cellular pathways, development, or disease. This workflow connects a targeted molecular intervention with questions about biological function.
Beyond pathway analysis, the approach supports research on gene function during development and in disease. These applications use reduced expression as a way to examine whether a gene is associated with a biological process or disease-related context. The same principle also explains its relevance to therapeutic research, where selective suppression is explored rather than assumed to be automatically effective.
Therapeutic research must address three linked practical problems: getting siRNA into cells, preserving its stability, and limiting unintended gene silencing. Even when the sequence can target a chosen messenger RNA, inadequate delivery or instability can weaken the approach, while unintended effects can complicate interpretation and reduce confidence in selective gene suppression.