Abstract

Project Title: RNAi As a Potential Mechanism of Antiviral Immunity in Neurons
Student: Yuxiao Tan ’17
Mentor: Dr. Suren Ambegaokar

Innate immunity has been demonstrated as a way to protect against bacterial and fungal infections through Toll signaling and immune deficiency (Imd) pathways. RNA interference (RNAi) was more recently demonstrated as a mechanism to protect against viral infection; however it is uncertain which cell types can employ RNAi as an immune mechanism against viruses. To test if neurons can use RNAi to counter virus infection, we used neuronal cells from Drosophila melanogaster (fruit fly) lines that have specific loss-of-function mutations in genes that control RNAi activity – Dicer-2 and Argonaute-2. Mutations in Dicer-2 or Argonaute-2 were predicted to increase neuronal susceptibility to infection by the neurotropic virus, Sigma Virus (SV). In addition, multiple cross between different mutant flies were designed to test the effect of crossing on RNAi activity, and determined using qPCR. Baby hamster kidney (BHK) cells were used to generate SV stock and quantification of SV stock was performed via plaque assay with Vero cells. This study will better define immune properties of neurons and the nervous system, which may lead to improved therapies for neuronal disorders and infections.