Related Experiment Video
Updated: May 28, 2026
High-Throughput Screening of Microbial Isolates with Impact on Caenorhabditis elegans Health
Published on: April 28, 2022
Screening for microbial metabolites affecting phenotype of Caenorhabditis elegans
Daisuke Yamamuro1, Ryuji Uchida, Yoko Takahashi
1Graduate School of Pharmaceutical Science, Kitasato University, Tokyo 108–8641, Japan.
Abstract:
Microbial samples, including our library of known microbial compounds (ca. 300) and microbial culture broths (ca. 9000), were screened for small molecules affecting the phenotype of Caenorhabditis elegans. As a result, seven known compounds were found to induce phenotypic abnormality of C. elegans. Staurosporine exhibited morphological defects in the vulva and tail of C. elegans, avermectin B1a exhibited hatching inhibition of starting eggs on day 1 at 25-100 µM and growth inhibition at 0.01-12.5 µM, siccanin and antimycin A inhibited the growth of C. elegans, and fluorouracil inhibited hatching of eggs newly spawned by adult C. elegans. Toromycin induced morphological defects in the intestine. 5-(4-Methoxyphenyl)-oxazole, isolated as a fungal metabolite for the first time, inhibited the hatching of eggs newly spawned by adult C. elegans.
Insights
Researchers screened microbial compounds for effects on the nematode Caenorhabditis elegans. Seven compounds induced abnormalities, including growth inhibition and developmental defects, highlighting potential new bioactive molecules.
Area of Science:
- Microbiology
- Toxicology
- Genetics
Background:
- Microbial compounds are a rich source of bioactive molecules.
- Caenorhabditis elegans is a valuable model organism for phenotypic screening.
- Understanding small molecule effects on C. elegans can reveal biological mechanisms.
Purpose of the Study:
- To screen a large library of microbial samples for compounds affecting C. elegans phenotype.
- To identify known and novel small molecules with biological activity in C. elegans.
- To characterize the specific phenotypic abnormalities induced by these compounds.
Main Methods:
- Screening of approximately 300 known microbial compounds and 9000 microbial culture broths.
- Phenotypic analysis of Caenorhabditis elegans exposed to microbial compounds.
- Dose-response assessments for specific toxicological endpoints.
Main Results:
- Seven known compounds were identified as inducers of C. elegans phenotypic abnormalities.
- Specific effects included morphological defects (vulva, tail, intestine), hatching inhibition, and growth inhibition.
- A novel fungal metabolite, 5-(4-Methoxyphenyl)-oxazole, was isolated and found to inhibit egg hatching.
Conclusions:
- Microbial screening identified several compounds with significant effects on C. elegans development and growth.
- These findings underscore the potential of microbial natural products in drug discovery.
- The identified compounds provide tools for further investigation into C. elegans biology and toxicology.
