The germline monopolizes longevity mechanisms by exporting repressive chromatin signals via extracellular vesicles that keep somatic proteostasis networks low‑connected. We hypothesize that somatic cells can acquire germline‑grade fidelity when they are forced to internalize these vesicles continuously, which will rewire their PPI networks toward high‑connectivity pro‑longevity modules and activate HSF1‑DR‑independent stress resistance. However, because the germline’s advantage also relies on culling damaged lineages, sustained vesicle uptake without a parallel increase in somatic apoptosis will lead to accumulation of DNA mutations and eventual fitness decline. This makes the hypothesis falsifiable: if vesicle‑induced network rewiring extends lifespan but raises somatic mutation load unless apoptosis is boosted, then the germline’s 'cheating' is not a free repair upgrade but a trade‑off that requires selective culling.

To test this, we will generate a transgenic C. elegans line expressing a germline‑specific vesicle marker (e.g., RAB‑27) under a heat‑shock inducible promoter in somatic tissues. After induction, we will quantify: (1) changes in somatic PPI network connectivity using affinity‑purification mass spectrometry focused on autophagy and oxidative‑phosphorylation hubs (cite [4], [5]); (2) proteostasis capacity via phosphorylation of HSF1 and aggregation reporters for body‑wall muscle and neurons; (3) lifespan under standard conditions; and (4) somatic single‑nucleotide mutation rates by whole‑genome sequencing of isolated somatic cells before and after treatment (cite [3]). Parallel cohorts will carry a somatic‑specific overexpression of the pro‑apoptotic gene egl‑1 to test whether boosting cell death mitigates mutation accumulation.

Predictions: (A) Vesicle induction alone will increase somatic network connectivity and extend median lifespan by ~20% relative to controls, mirroring germline‑ablation phenotypes (cite [2]). (B) The same vesicles will elevate somatic mutation burden by ~1.5‑fold after 10 days, detectable as increased G→T transversions. (C) Combined vesicle induction and egl‑1 overexpression will retain the lifespan extension while keeping mutation rates at baseline, demonstrating that immortality‑like somatic function depends on both network rewiring and rigorous lineage culling.

If vesicle uptake fails to remodel somatic PPI networks or does not affect lifespan, the hypothesis is refuted, suggesting that germline longevity signals act through mechanisms other than transmissible chromatin repression. Conversely, if apoptosis blockade abolishes the benefit despite network changes, it confirms that the germline’s edge lies in its ability to couple high‑fidelity repair with relentless purging of defective cells—a principle that could be transplanted to somatic compartments only when paired with an appropriate selection pressure.