The nematode Caenorhabditis elegans, widely recognized as a model organism due to its ease of breeding and well-characterized genomes, boasts complete digestive, reproductive, and endocrine systems, as well as conserved signaling pathways shared with mammals. It has become an invaluable resource for metabolomics research, particularly in examining responses to chemical or environmental factors and toxicity assessments. In this article, we provide detailed, step-by-step protocols for cultivating C. elegans and conducting metabolomics analyses, specifically focusing on sample preparation for GC-MS analysis in response to toxic compound treatments. We highlight the critical choice of extraction solvent, introducing two representative systems for extracting metabolites from C. elegans.
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