Abstract
The use of small double-stranded RNA to inhibit expression of genes has proven to be a powerful tool to analyze the biological function of genes in various eukaryotic organisms. We have established the RNAi technology in three genera of spirotrichous ciliates, Euplotes, Oxytricha and Stylonychia . Here we describe this method to silence gene expression in these three genera. Expression of the following genes was inhibited: the catalytic subunit of telomerase (TERT) and the telomerase-associated protein p43 in Euplotes and the a-subunit of the telomere-binding protein (αTeBP) of Stylonychia and Oxytricha . In addition, we report how the biological function of a developmentally regulated gene can be elucidated by this technique in Stylonychia.
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