ArticleInflammation2025
Nicotinamide N-oxide Inhibits Microglial Pyroptosis by Upregulating Mitophagy and Alleviates Neural Damage in Rats after TBI.
Article in Inflammation, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Unveiling a novel pathway: Ginseng vanillic acid fights heart failure by coupling mitophagy to pyroptosis through the PINK1-BRCA1-NLRP3 axis.Journal of ginseng research · 2026Article
- Remimazolam Attenuates Neurological Injury After TBI: A Potential Role of α7nAChR-Associated Mitophagy Enhancement and Pyroptosis Suppression in BV2 Cells.Drug design, development and therapy · 2026Article
- HMC3 revealed: how much do these "Microglia" really tell us?Frontiers in immunology · 2026Review
- Role of damage-associated molecular patterns in the pathogenesis and therapeutics of traumatic brain injury.Burns & trauma · 2025Review
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Authors and funding
11 authors.
Funding
Abstract
Traumatic brain injury (TBI) is a severe injury characterized by neuroinflammation and oxidative stress. NAMO (Nicotinamide n-oxide) has anti-inflammatory and inhibits microglial overactivation in neurological disorders. However, the role and mechanism of NAMO in microglial pyroptosis after TBI are unknown. The aim of this study was to investigate the effects of NAMO on TBI and its potential mechanisms through in vivo and in vitro models. In this study, western blot assays were performed by extracting brain tissue mitochondria, and the results showed that NAMO promoted the expression of mitophagy-associated proteins (p62, LC3B, and TOMM20), reduced ROS levels, and inhibited pyroptosis-associated proteins (NLRP3, GSDMD, GSDMD-N, and Caspase-1) and inflammatory cytokines (IL-1β and IL-18). We followed up with immunofluorescence co-localization of GSDMD and IBA 1, which showed that NAMO inhibited microglial pyroptosis. In addition, NAMO promoted neurological recovery after TBI. In vitro experiments showed that NAMO upregulated mitophagy, improved mitochondrial dysfunction, and reduced ROS levels in microglia following lipopolysaccharide (LPS) + adenosine triphosphate (ATP) stimulation in HMC3 cells. We also found that NAMO inhibited pyroptosis-related proteins. To further illustrate whether NAMO affects pyroptosis through mitophagy, we applied the mitophagy inhibitor Mdivi-1 in both in vivo and in vitro models. The results showed that Mdivi-1 reversed NAMO's inhibitory effect on microglial pyroptosis. Taken together, our findings demonstrate that NAMO improves neurological recovery by inhibiting microglial pyroptosis through upregulation of mitophagy, suggesting that NAMO could be a potential therapeutic agent for TBI.
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