Daniel Patrick Gainey, Andrey V Shubin, Craig P Hunter
{"title":"Reported transgenerational responses to <i>Pseudomonas aeruginosa</i> in <i>Caenorhabditis elegans</i> are not robust.","authors":"Daniel Patrick Gainey, Andrey V Shubin, Craig P Hunter","doi":"10.7554/eLife.100254","DOIUrl":null,"url":null,"abstract":"<p><p>We report our attempt to replicate reports of transgenerational epigenetic inheritance in <i>Caenorhabditis elegans</i>. Multiple laboratories report that <i>C. elegans</i> adults and their F1 embryos exposed to the pathogen <i>Pseudomonas aeruginosa</i> show pathogen aversion behavior and increased <i>daf-7/TGFβ</i> reporter gene expression. However, results from one group show persistence of both through the F4 generation. We failed to consistently detect either the avoidance response or elevated <i>daf-7</i> expression beyond the F1 generation. We confirmed that the dsRNA transport proteins SID-1 and SID-2 are required for intergenerational (F1) inheritance of pathogen avoidance, but not for the F1 inheritance of elevated <i>daf-7</i> expression. Reanalysis of RNA seq data provides additional evidence that this intergenerational inherited PA14 response may be mediated by small RNAs. The experimental methods are well-described, the source materials are readily available, including samples from the reporting laboratory, and we explored a variety of environmental conditions likely to account for lab-to-lab variability. None of these adjustments altered our results. We conclude that this example of transgenerational inheritance lacks robustness, confirm that the intergenerational avoidance response, but not the elevated <i>daf-7p::gfp</i> expression in F1 progeny, requires <i>sid-1</i> and <i>sid-2</i>, and identify candidate siRNAs and target genes that may mediate this intergenerational response.</p>","PeriodicalId":11640,"journal":{"name":"eLife","volume":"13 ","pages":""},"PeriodicalIF":6.4000,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11942167/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"eLife","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.7554/eLife.100254","RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"BIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
We report our attempt to replicate reports of transgenerational epigenetic inheritance in Caenorhabditis elegans. Multiple laboratories report that C. elegans adults and their F1 embryos exposed to the pathogen Pseudomonas aeruginosa show pathogen aversion behavior and increased daf-7/TGFβ reporter gene expression. However, results from one group show persistence of both through the F4 generation. We failed to consistently detect either the avoidance response or elevated daf-7 expression beyond the F1 generation. We confirmed that the dsRNA transport proteins SID-1 and SID-2 are required for intergenerational (F1) inheritance of pathogen avoidance, but not for the F1 inheritance of elevated daf-7 expression. Reanalysis of RNA seq data provides additional evidence that this intergenerational inherited PA14 response may be mediated by small RNAs. The experimental methods are well-described, the source materials are readily available, including samples from the reporting laboratory, and we explored a variety of environmental conditions likely to account for lab-to-lab variability. None of these adjustments altered our results. We conclude that this example of transgenerational inheritance lacks robustness, confirm that the intergenerational avoidance response, but not the elevated daf-7p::gfp expression in F1 progeny, requires sid-1 and sid-2, and identify candidate siRNAs and target genes that may mediate this intergenerational response.
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