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Oral Delivery System Developed for RNAi

Researchers have shown that interfering RNA (RNAi) enclosed in a yeast-derived particle can be orally delivered to mice to effectively turn off a target gene in cells (macrophages) influencing inflammation. This work has important implications for the promising field of RNAi therapeutics, where progress has been hindered by difficulties in achieving targeted RNAi delivery. "We are very encouraged by these results, which show that oral delivery of a therapeutic dose of small, interfering RNA (siRNA) to a specific cell type in an animal model is possible, and that evidence of gene silencing using this delivery system is measurable," said Professor Michael Czech of the University of Massachusetts Medical School, the senior author of the paper. This work is reported in the April 30 issue of Nature. [UMMS press release] [Nature abstract]