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Experimental RNAi

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 Interference

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...

RNA Interference

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...

Types of RNA

Types of RNA

Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...

Types of RNA

Types of RNA

Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...

siRNA - Small Interfering RNAs

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...

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DNA Vector-based RNA Interference to Study Gene Function in Cancer

DNA Vector-based RNA Interference to Study Gene Function in Cancer

Published on: June 4, 2012

Using RNA interference to study protein function.

Carol D Curtis¹, Ann M Nardulli

¹Department of Molecular and Integrative Physiology, University of Illinois, Urbana, IL, USA.

Methods in Molecular Biology (Clifton, N.J.)

|January 2, 2009

Summary

This summary is machine-generated.

This chapter details a method using small interfering RNA (siRNA) to reduce target gene and protein levels in cells. This technique helps researchers understand protein function in its natural cellular context.

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Area of Science:

Molecular Biology
Cell Biology
Genetics

Background:

Understanding endogenous protein function is crucial for cellular biology.
RNA interference (RNAi) offers a powerful tool for functional genomics.
Investigating protein roles requires methods to modulate their expression in situ.

Purpose of the Study:

To describe a method for determining endogenous protein function using RNA interference.
To outline the use of small interfering RNA (siRNA) for gene knockdown in cultured cells.
To enable the delineation of a protein's regulatory effects on gene expression.

Main Methods:

Utilizing small interfering RNA (siRNA) to achieve messenger RNA (mRNA) and protein knockdown.
Employing cultured cells as the experimental system for gene silencing.
Assessing siRNA effectiveness via real-time quantitative PCR (RT-qPCR).
Validating knockdown efficiency using Western blot analysis.

Main Results:

Successful reduction of target mRNA and protein expression was achieved.
The method allows for the functional analysis of specific proteins within their cellular milieu.
Quantitative PCR and Western blot confirmed the efficacy of the siRNA-mediated knockdown.

Conclusions:

RNA interference provides a robust approach for studying endogenous protein function.
The described siRNA method is effective for gene silencing in cell culture.
This technique facilitates the investigation of protein-mediated gene regulation.