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April 5, 2026Cancer Research

Abstract 4568: Inhibition of nicotinamide phosphoribosyltransferase (NAMPT) impairs cellular viability, affects energy metabolism, induces DNA damage, and drives tumor regression in preclinical models of neuroblastoma

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Authors

AYAmy YuSVSophia VarrianoVCVictor J. Collins

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Overview

Preclinical models show NAMPT inhibition impairs viability and induces DNA damage in neuroblastoma, suggesting a new treatment avenue.

Key Points

  • This research investigates the effects of NAMPT inhibition on cellular viability, energy metabolism, and DNA integrity in neuroblastoma models.
  • Conducted a high-throughput screen identifying neuroblastoma cell sensitivity to NAMPT inhibitors.
  • Validated findings using clinical NAMPT inhibitors in molecularly diverse neuroblastoma cell lines.
  • Assessed mechanistic effects on NAD+-dependent pathways and analyzed in vivo effects in orthotopic models.
  • Evaluated cell death mechanisms and effects on NAD+ consuming enzymes including SIRT1 and PARP.
  • Neuroblastoma cells showed 20-fold higher sensitivity to NAMPT inhibitors compared to other solid tumors.
  • Treatment resulted in over 90% reduction in ATP levels after 72h.
  • Both PARP and SIRT1 activities significantly decreased with NAMPTi treatment, leading to increased DNA damage.
  • In vivo studies showed 67% average tumor volume reduction in orthotopic xenografts.

Cite This Study

Yu et al. (2026) studied this question.

synapsesocial.com/papers/69d1fcd4a79560c99a0a28b4https://doi.org/10.1158/1538-7445.am2026-4568
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