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Updated: Apr 2, 2026
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A High-throughput Assay for the Prediction of Chemical Toxicity by Automated Phenotypic Profiling of Caenorhabditis elegans
Published on: March 14, 2019
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PDMS aqueous leachates cause acute toxicity in C. elegans.
Kin Gomez1, Kirill Efimenko1, Jan Genzer1
1Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA. asanmig@ncsu.edu.
Lab on a Chip
|April 1, 2026
Summary
Polydimethylsiloxane (PDMS) components can be toxic, with effects varying based on environmental factors and organismal history. This study reveals PDMS leachates are not universally biocompatible, necessitating careful evaluation for biomedical applications.
Area of Science:
- Biomaterials Science
- Toxicology
- Developmental Biology
Background:
- Polydimethylsiloxane (PDMS) is widely used in microfluidics and biomedicine, often presumed biocompatible.
- PDMS network components, particularly uncrosslinked chains, can leach into aqueous environments.
- The organismal effects of these leachates are not fully understood.
Purpose of the Study:
- To systematically assess the organismal toxicity of PDMS network components and leachates.
- To investigate the influence of environmental conditions and physiological history on PDMS toxicity.
- To provide a framework for evaluating polymer leachate toxicity in living organisms.
Main Methods:
- Utilized *Caenorhabditis elegans* as a whole-animal model.
- Assessed toxicity of various PDMS components (v-PDMS, linear/cyclic siloxanes, TDSS).
- Investigated effects of media composition, cholesterol, metal ions, and parental starvation on toxicity using reporter strains.
Main Results:
- Uncrosslinked vinyl-terminated PDMS (v-PDMS) exhibits environmentally-dependent acute toxicity.
- Cholesterol, calcium, and magnesium reduced v-PDMS lethality; trace metals increased it.
- Transgenerational stress memory (parental starvation) conferred resistance to v-PDMS toxicity.
Conclusions:
- PDMS-derived components are not universally harmless and exhibit variable toxicity.
- Environmental conditions, sterol levels, and physiological history significantly modulate PDMS leachate effects.
- Careful evaluation of PDMS formulations is crucial for safe biomedical applications.
