ArticleJournal of extracellular vesicles2025
USP5-Laden ApoEVs and E2F1 Stabilization in Disc Repair: Unresolved Questions on Senescence, Specificity and Endosomal Escape.
Article in Journal of extracellular vesicles, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
3 citing papers in PubMed.
- An SSK1-loaded decellularized annulus fibrosus matrix-based PD hydrogel alleviates intervertebral disc degeneration through modulation of NF-κB signaling and ferroptosis.Journal of orthopaedic translation · 2026Article
- Ubiquitination in intervertebral disc degeneration: from mechanisms to potential therapeutic strategies.Journal of orthopaedic translation · 2026Review
- Quantitative lipidomics reveals Lipid perturbation of plasma apoptotic extracellular vesicles during physiological aging.Frontiers in cell and developmental biology · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
Abstract
The seminal work by Shi et al. unveils a novel cytoprotective mechanism in intervertebral disc degeneration, whereby USP5-rich apoptotic extracellular vesicles (ApoEVs) stabilize the transcription factor E2F1 to suppress apoptosis and enhance DNA repair in nucleus pulposus cells. While this study elegantly reframes the reparative potential of ApoEVs, its conceptual and translational premises invite critical scrutiny. This letter highlights several overlooked challenges. We argue that the contextual duality of E2F1-a well-established regulator of both cell survival and senescence-poses a considerable therapeutic hazard, as sustained E2F1 stabilization may inadvertently trigger a senescent phenotype. Moreover, the generalizability of this mechanism remains uncertain: ApoEV cargo and functionality are highly dependent on the apoptotic stimulus, and vesicles derived from etoposide-induced apoptosis may not mirror those produced under pathophysiological disc conditions. Crucially, the proposed pathway-from vesicle internalization and endosomal escape of luminal USP5 to its nuclear trafficking and engagement with E2F1-represents a mechanistic black box requiring rigorous validation. Resolving these issues is essential to translating this compelling discovery into a safe and effective therapeutic strategy.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.