Double-stranded rna binding proteins in serum contribute to systemic rnai across phyla—towards finding the missing link in achelata

Abstract

RNA interference (RNAi) has become a widely utilized method for studying gene function, yet despite this many of the mechanisms surrounding RNAi remain elusive. The core RNAi machinery is relatively well understood, however many of the systemic mechanisms, particularly double-stranded RNA (dsRNA) transport, are not. Here, we demonstrate that dsRNA binding proteins in the serum contribute to systemic RNAi and may be the limiting factor in RNAi capacity for species such as spiny lobsters, where gene silencing is not functional. Incubating sera from a variety of species across phyla with dsRNA led to a gel mobility shift in species in which systemic RNAi has been observed, with this response being absent in species in which systemic RNAi has never been observed. Proteomic analysis suggested lipoproteins may be responsible for this phenomenon and may transport dsRNA to spread the RNAi signal systemically. Following this, we identified the same gel shift in the slipper lobster Thenus australiensis and subsequently silenced the insulin androgenic gland hormone, marking the first time RNAi has been performed in any lobster species. These results pave the way for inducing RNAi in spiny lobsters and for a better understanding of the mechanisms of systemic RNAi in Crustacea, as well as across phyla. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

About

Research Hub Investigator(s)

A/Prof Quinn Fitzgibbon

Research Hub Director

Publication Year

2020

Citation

Banks, T.M., Wang, T., Fitzgibbon, Q.P., Smith, G.G. & Ventura, T. 2020, "Double-stranded rna binding proteins in serum contribute to systemic rnai across phyla—towards finding the missing link in achelata", International Journal of Molecular Sciences, vol. 21, no. 18, pp. 1-20.

Link to this Publication

Back to our Publication List

The ARC Research Hub for Sustainable Onshore Lobster Aquaculture is funded by the Australian Government through the Australian Research Council Industrial Transformation Research Program.

For more information about the Research Hub please contact us at Lobster.Aquaculture@utas.edu.au or phone +61 3 6226 8268.

About this site