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Anthelminthic Screening for Parasitic Nematodes

For many parasitic diseases, high-throughput phenotypic screening is an important tool in finding new drugs. Some of the most important parasitic diseases are caused by nematodes. However, these parasitic nematodes are not typically amenable to high throughput screening. Due to the ease of its maintenance and suitability for high throughput assay, the nematode Caenorhabditis elegans is instead used. To address whether C. elegans is a good model for nematode drug discovery, we compared the drug susceptibility of C. elegans relative to the human hookworm nematode parasite Ancylostoma ceylanicum at several developmental stages using a library of FDA approved drugs. I will present results of these studies that point to how well C. elegans efficacy correlates with hookworm efficacy and how early larval stages (easier to get) correlated with adult stages (more representative of what stage is targeted in human therapy). In addition, we are working on moderate-high throughput system for screening adult parasites. Murine Holigmosomoides polygyrus is a good model for human parasitic nematodes. Using Union Biometrica, Copas, worm sorter we were able to sort H. polygyrus into 384 well format. Here I will discuss the capabilities of this system as well as how we are building de novo, in collaboration with the Albrecht laboratory at WPI, an imaging and image analysis platform for screening adult stages of this parasite against large drug libraries.