GoKawiilStudy links fly gene Lsp2 to mTORC1-driven ribosomal protein translation and lifespan
Researchers studying Drosophila found that mutating the Lsp2 gene altered translation of TOP mRNAs, particularly those encoding ribosomal proteins, and changed ribosomal subunit ratios and lifespan compared to control flies. They further showed that removing the translational repressor 4E-BP (Thor) shifted how dietary protein levels affect lifespan, without changing mTORC1 activity or overall protein synthesis rates, indicating a specific rather than general translational effect.
GoKawiil's interpretation of the reporting above, not reported fact.
The findings suggest Lsp2 may act as a downstream effector connecting mTORC1 signaling to selective translation of ribosomal components, which could refine models of how nutrient-sensing pathways influence aging. Because mTORC1 is a central target in aging and metabolic research, identifying more specific downstream regulators like Lsp2 could help researchers design interventions that avoid the broad side effects of directly inhibiting mTORC1.
- Lsp2 mutant flies show altered ribosomal protein translation and changed 60S/40S ribosomal subunit ratios
- Loss of 4E-BP (Thor) changes how dietary protein affects lifespan without altering mTORC1 activity or total protein synthesis
- The work points to selective TOP mRNA translation, rather than general translation, as a key link between mTORC1 signaling and lifespan
Source: nature.com — Wang, 2026-09-23
Published there as: “Lsp2 links mTORC1 to TOP mRNA translation and lifespan in <i>Drosophila</i>”
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