| Citation | Ward JD, Mullaney B, Schiller BJ, He le D, Petnic SE, Couillault C, Pujol N, Bernal TU, van Gilst MR, Ashrafi K, Ewbank JJ, Yamamoto KR. Defects in the C. elegans acyl-CoA synthase, acs-3, and nuclear hormone receptor, nhr-25, cause sensitivity to distinct, but overlapping stresses. PLoS One, 2014. |
| PubMed ID | 24651852 |
| Short Description | Defects in the C. elegans acyl-CoA synthase, acs-3, and nuclear hormone receptor, nhr-25, cause sensitivity to distinct, but overlapping stresses. GEO Record: GSE48605 Platform: GPL5859 Download gene-centric, log2 transformed data: WBPaper00045015.ce.mr.csv |
| # of Conditions | 6 |
Full Description
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Metazoan transcription factors control distinct networks of genes in specific tissues, yet understanding how these networks are integrated into physiology, development, and homeostasis remains challenging. Inactivation of the nuclear hormone receptor nhr-25 ameliorates developmental and metabolic phenotypes associated with loss of function of an acyl-CoA synthetase gene, acs-3. ACS-3 activity prevents aberrantly high NHR-25 activity. Here, we investigated this relationship further by examining gene expression patterns following acs-3 and nhr-25 inactivation. Unexpectedly, we found that the acs-3 mutation or nhr-25 RNAi resulted in similar transcriptomes with enrichment in innate immunity and stress response gene expression. Mutants of either gene exhibited distinct sensitivities to pathogens and environmental stresses. Only nhr-25 was required for wild-type levels of resistance to the bacterial pathogen P. aeruginosa and only acs-3 was required for wild-type levels of resistance to osmotic stress and the oxidative stress generator, juglone. Inactivation of either acs-3 or nhr-25 compromised lifespan and resistance to the fungal pathogen D. coniospora. Double mutants exhibited more severe defects in the lifespan and P. aeruginosa assays, but were similar to the single mutants in other assays. Finally, acs-3 mutants displayed defects in their epidermal surface barrier, potentially accounting for the observed sensitivities. Together, these data indicate that inactivation of either acs-3 or nhr-25 causes stress sensitivity and increased expression of innate immunity/stress genes, most likely by different mechanisms. Elevated expression of these immune/stress genes appears to abrogate the transcriptional signatures relevant to metabolism and development. Experimental Details: WBPaper00045015:nhr-25(RNAi)_vs_N2(control-RNAi)_rep1 WBPaper00045015:nhr-25(RNAi)_vs_N2(control-RNAi)_rep2 WBPaper00045015:nhr-25(RNAi)_vs_N2(control-RNAi)_rep3 WBPaper00045015:acs-3(ft5)_vs_N2_rep1 WBPaper00045015:acs-3(ft5)_vs_N2_rep2 WBPaper00045015:acs-3(ft5)_vs_N2_rep3. |
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