Matricidal hatching can induce multi-generational effects in nematode Caenorhabditis elegans after dietary exposure to nanoparticles
In this study, we investigated multi-generational effects and generation particle transfer in Caenorhabditis elegans following maternal food exposure to core-shell quantum dots. We found that that the Bag of Worms (BOW) phenotype in aged worms induces changes in quantum dot distribution in the parental body, which is related to the inter-generation transfer of these nanoparticles and to their effects in the offspring. To confirm these results we examined a variety of endpoints, namely, survival, reproduction, aging phenotype, oxidative stress, and intestinal fat metabolism. We show that worms born to parents at different times after exposure show different phenotypic effects as a consequence of quantum dot transfer. This evidence of trans-generational transfer and the effects of nanoparticles highlights the complex multi-generational effects and potential safety hazards that can occur under real environmental conditions.
KeywordsBag of Worms (BOW) Reproduction Reproductive senescence Quantum dots
We thank Prof. Yhong Hee Shim (Konkuk University) and Prof. Junho Lee (Seoul National University) for providing the C. elegans strains.
This research was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, and Future Planning (2016R1A2B3010445, 2016M3A6A7945504). This work also was supported by Korea Environment Industry & Technology Institute through “The Chemical Accident Prevention Technology Development Project”, funded by Korea Ministry of Environment (No. 2016001970001).
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