Single-cell and single-nucleus transcriptomics have greatly advanced our understanding of how individual cells and tissues function in both healthy and diseased states. This technology allows scientists to study gene expression at the level of individual cells, giving them a more detailed picture of how diseases develop and how organisms function overall.

While this approach has been widely used in model organisms like mice and fruit flies, applying it to non-model species—such as parasitic nematodes—presents unique challenges. These challenges include differences in cell types, tissue structures, and the complex nature of parasitic life cycles. To address these hurdles, researchers at the Wellcome Sanger Institute have worked to optimize techniques that can be applied to parasitic nematodes, which are often studied in relation to human diseases and infections.

In this study, the researchers evaluated and improved three established methods for isolating nuclei from parasitic nematodes, a key step for performing transcriptomics. They developed an optimized protocol called SNIP (Single Nuclei Isolation Protocol) to better capture and analyze the gene expression of these parasites. By testing SNIP on different species of nematodes and at various stages of their life cycles, the researchers were able to confirm that this protocol works across different types of parasitic nematodes.

Overview of the Single Nuclei Isolation of Parasites (SNIP) protocol

A) Schematic comparison of the optimised SNIP protocol for macroscopic (adult worms) and microscopic (eggs and larvae) samples; B) Representative phase contrast, SYBR Green I stained fluorescent, and overlay images of nuclei after washing and filtering. Scale bar = 50 µm; C) Representative images of the H. contortus adult female nuclei suspension after debris removal by FACS. Scale bar = 100 µm.

The results revealed important insights into how these nematodes express genes based on factors such as sex, life stage, and the specific tissue involved. For example, they were able to identify which genes are more active in different tissues or during different life stages of the parasite. This information is crucial for understanding how parasitic nematodes infect hosts and cause diseases.

Ultimately, the optimized SNIP protocol offers a more effective way to study parasitic nematodes at the molecular level, advancing our knowledge of their biology and improving our ability to address the diseases they cause. These findings will not only help researchers understand how these parasites function but also inform strategies for developing new treatments and interventions for parasitic infections.