RNA interference (RNAi) is a kind of gene silencing. Small interfering RNA
(siRNA) is used to suppress gene expression by degrading the message RNA (mRNA) of the
target gene. Effective siRNAs are important in RNAi experiments. There are a lot of
principles for siRNA design,such as MPI basic principles and Tuschl principles and so on.
On the basis of these studies,some have made further research on the relationship between
RNA secondary structure and silencing efficiency of siRNA,and several models have been
established,such as H-b index,spelling loops and so on. In this paper,we discuss and
analyze the studies of RNA secondary structure in siRNA design.
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