Words similar to sirna
Example sentences for: sirna
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Processing of pri-miRNA into the pre-miRNA stem-loop occurs in the nucleus, while subsequent processing of pre-miRNA into 21-22 mers is a cytoplasmic event mediated by the RNAse III enzyme Dicer [ 17 18 19 20 ] ; Dicer is also responsible for cleavage of long perfectly double-stranded RNA into 21-22 nucleotide fragments during RNA interference (RNAi) [ 2 21 ] . These latter molecules, known as silencing RNA (siRNA), bind to and trigger the degradation of perfectly homologous mRNA molecules via RISC, a double-strand RNA-induced silencing complex containing nuclease activity [ 22 23 ] .
RNA interference (RNAi), mediated by short interfering double-stranded RNA molecules (siRNA or dsRNA), is now recognized as a major mechanism of post-transcriptional gene silencing (PTGS) in essentially all eukaryotes [ 16 ] . Recently, the technique has been successfully applied to cultured mammalian cells, whereby introduction of 21-nucleotide long synthetic dsRNA molecules corresponding to specific mRNA sequences effectively and specifically degraded the cognate mRNAs and abrogated the expression of the corresponding proteins [ 17 18 ] . This prompted us to test a similar approach to knockdown PfPP1 function in the erythrocytic P. falciparum stages.
Usman expects Sirna to file an Investigational New Drug Application with the FDA by the end of 2004 and to have a human clinical trial in progress in 2005.
Using siRNA, designed to reduce endogenous hnRNPK, they showed suppression of both hnRNPK mRNA and HBV viral load, whereas a control siRNA had no effect on HBV viral load.
4, panel E) show that even at the highest siRNA concentration (400 nM), at which essentially all the profilin was knocked down (data not shown), 60-80% of viral RNA synthesis continued in A549 cells, whereas in L2 cells the effect was slightly more severe, with 30-50% RNA synthesis remaining.
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