Loss of β-catenin is identified as an upstream driver of nuclear lamina deterioration, acting through two convergent routes: failure of enhancer activity that sustains lamina gene expression, and β-TrCP-directed ubiquitin-proteasome degradation of lamina proteins. Because nuclear lamina integrity governs chromatin organization, genome stability, and the onset of cellular senescence, this positions Wnt/β-catenin signaling as a regulatory node linking transcriptional control to structural aging of the nucleus.
Key Points
- β-catenin depletion disrupts enhancers maintaining nuclear lamina gene expression
- β-TrCP-mediated proteasomal degradation accelerates loss of lamina proteins
- Nuclear lamina decay links Wnt signaling to cellular senescence
Longevity Analysis
Nuclear lamina breakdown is a recognized feature of both premature aging syndromes and normal cellular aging, and tying it to a single upstream signaling pathway narrows where intervention could plausibly act. The dual mechanism matters: restoring transcriptional output alone would be insufficient if protein clearance machinery continues to strip the lamina, which argues for interventions that address both production and degradation. For tissues that depend on continuous renewal — skin, gut lining, blood-forming compartments — the integrity of this nuclear scaffold determines whether stem cell populations retain regenerative capacity or drift toward senescence and the inflammatory signaling that follows.
Original published by Nature - npj Aging, by Jiao Yang.