ArticleScientific reports2026
The FMRFamide-like peptide FLP-11 regulates the production and secretion of the TGF-β-like protein DAF-7 during Caenorhabditis elegans larval development.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
FMRFamide-like peptides (FLPs) are widely conserved in nematodes. Here, we conducted a molecular genetic study to confirm that the flp-11 gene regulates larval development in the free-living soil nematode model species Caenorhabditis elegans. We demonstrated that: (1) FLP-11 suppresses larval development, resulting in dauer diapause; (2) the production and secretion of FLP-11 by specific neurons is modulated by the availability of food (e.g., Escherichia coli) and by population density, both of which determine larval development/dauer diapause via transforming growth factor-β (TGF-β)-like and insulin-like signaling; (3) the FLP-11 peptide reduces the production and secretion of DAF-7, the sole TGF-β-like protein involved in larval development; (4) FLP-11 is not involved in insulin-like signaling; (5) FLP-11 modulates dauer diapause via neuropeptide receptor-22 (NPR-22), which regulates DAF-7 production and secretion. This study highlights the significance of a short neuropeptide that responds to the growth environment and directly regulates a TGF-β-like protein via its receptor candidate, thereby influencing larval development in C. elegans.
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