RNA Interference (RNAi)
RNAi (RNA interference) is a recently discovered phenomenon that has burst on to the forefront of genetic research. RNAi appears to be an ancient and widespread genetic immune mechanism. Recent breakthroughs have shown that RNAi plays an important role in defending again several types of viruses and is also involved in a number of regulatory mechanisms within the cell. RNA interference is a phenomenon by which the expression of double stranded RNA (dsRNA) specifically stimulates a cellular process that reduces gene expression in a sequence specific manner. Small synthetic RNA, termed small interfering RNAs (siRNA), which are typically 21-28 nucleotides in length, can induce RNAi and knockdown gene expression in mammalian cells without inducing an antiviral response.

Biochemical studies have elucidated the mechanism of RNAi. Double stranded RNA is processed by an enzyme known as Dicer resulting in the production of siRNA molecules. These molecules are then able to form a multi-protein siRNA complex, known as the RNA-induced Silencing Complex (RISC). The RISC/siRNA complex catalyzes the cleavage and degradation of the complement mRNA molecules.

The use of RNAi applications, including small interfering RNA, to reduce cellular gene expression appears to have significant advantages over other approaches for targeted gene regulation. The potency of siRNA molecules, sequence-specific design, and ability of siRNAs to be re-used to guide mRNA degradation in cells bears a significant advantage over anti-sense oligonucleotides and ribozyme-stem approaches. Well-designed and functional siRNAs are capable of effectively bypassing the interferon response in order to induce specific post-transcriptional gene silencing or RNAi in vitro and in vivo. Altogen Custom Services offer stable cell line generation and RNAi gene silencing services.

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siRNA Transfection | Transfection Methods | Stable Transfection | RNAi | siRNA Library Screening | RNAi Therapeutics | Cell Transfection | In Vivo Transfection Reagents | Cell Line Specific Transfection Reagents

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Altogen Biosystems

Altogen Biosystems is a life sciences company dedicated to the development, marketing and manufacture of cell type specific transfection reagents. Efficient delivery of DNA, RNA, siRNA, and microRNA enabled by advanced formulation of reagents and peculiar design of protocols.

Altogen Biosystems offers a complete transfection system for a broad range of cell lines. All reagents are functionally tested to be highly reproducible, serum compatible, induce low toxicity, and can be used for co-transfection experiments, and high throughput applications.