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Among short-lived miRNA mutants, a mir-71 deletion mutant, mir-71(n4115) (referred to as mir-71(lf) hereafter), displayed a severe reduction in L1 starvation survival rate (Table S1 and Fig. 2A). We found that the reduced survival rate of ain-1 was suppressed by either reduction of age-1 function or loss of unc-31 function (Fig. 1 B and C), suggesting that a significant portion of the overall miRNA functions in L1 diapause is upstream of, or in parallel to, the InsR pathway. In this study, we addressed the questions of whether and how miRNAs impact developmental arrest and the long-term survival of early L1 stage worms in response to food starvation.<\/p>\n

Well Beyond Recovery<\/h2>\n

1A because the ain-1 mutations reduce, but do not eliminate, miRISC functions. The overall effect of miRNAs on L1 starvation survival is expected to be significantly stronger than that reflected by the data in Fig. These results suggest that miRNAs act in the intestine, and possibly in other tissues, to promote L1 starvation survival. MicroRNAs (miRNAs) are well known for their functions in controlling developmental timing in the nematode (5, 6). Upon entering L1 diapause, RNA polymerase II quickly accumulates and pauses at promoter regions, and this accumulation was speculated to stop transcription and facilitate the immediate reinitiation of gene expression when food becomes available (2).
\nPrevious studies showed that the release of postdocking calcium-regulated dense-core vesicles, the insulin receptor (InsR) pathway, the AMPK pathway, and protein chaperones are required for the long-term survival of starved L1 worms (2\u20134). Unlike dauer diapause, L1 diapause is not accompanied by life cycle changes and has not been shown to require certain signaling pathways that control the formation of dauer diapause such as TGF-\u03b2 signaling (daf-1, daf-7) and nuclear hormone receptor (daf-12) (2, 3). The coordinated entrance into developmental arrest, long-term survival, and the reinitiation of development upon food availability are important biological processes to investigate. Different organisms have developed versatile growth arrest strategies to overcome starvation-induced metabolic and developmental problems. The presented results indicate that interactions between multiple miRNAs and likely a large number of their mRNA targets in multiple pathways regulate the response to starvation-induced L1 diapause.
\nThis will be followed by an ‘ex post evaluation’\u00a0in 2028, once the measures included in the recovery plans are fully implemented. The RRF Regulation requires that the Commission provides the European Parliament, the Council,\u00a0the European Economic and Social Committee and the Committee of the Regions with a mid-term evaluation on the implementation of the Recovery and Resilience Facility. Member States can also amend their plan if they can demonstrate that\u00a0objective circumstances\u00a0render the implementation of certain milestones and targets unfeasible. The RRF is also crucial for implementing the\u00a0REPowerEU plan \u2013 the Commission\u2019s response to the socio-economic hardships and global energy market disruption caused by Russia’s invasion of Ukraine.<\/p>\n