ArticleBiology2026
Beyond NAD Depletion: SARM1-Induced ATP Collapse Involves Direct ATP Degradation and Mitochondrial Dysfunction and Is Pharmacologically Reversible.
Article in Biology, 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
Sterile alpha and Toll/interleukin-1 receptor motif-containing protein 1 (SARM1) is an inducible NAD-consuming enzyme and execution factor in axon degeneration. Rapid ATP collapse after SARM1 activation, however, is not fully explained by NAD depletion alone. We used SARM1-overexpressing HEK293 cells and the cell-permeant activator CZ-48 to examine SARM1-induced non-apoptotic cell death, termed sarmoptosis. CZ-48 induced cell death that was suppressed by HSP90/70-annotated ATP-competitive compounds, especially geldanamycin and VER-155008 (VER), without reducing SARM1 abundance. VER preserved NAD and ATP during SARM1 activation but failed to rescue FK866-mediated NAD starvation, thereby distinguishing CZ-48/SARM1-driven cytotoxicity from generic NAD depletion. In cell-free assays, purified SARM1 reduced ATP levels; this effect was enhanced by SARM1's activator NMN and attenuated by its pharmacological inhibitors, although the
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