Nmnat2 delays axon degeneration in superior cervical ganglia dependent on its NAD synthesis activity
Abstract
Axon degeneration is an active program of self-destruction observed in many physiological and pathological settings. There are three Nicotinamide mononucleotide adenylyl transferase (Nmnat, EC2.7.7.1) in mammals. Overexpression of Nmnat1 or Nmnat3 can delay axon degeneration, while the role of Nmnat2 in axon degeneration remains largely unknown. Here we found that Nmnat2 was specifically and highly expressed in brain compared with Nmnat1 and Nmnat3. Furthermore, we found brain Nmnat2 was correlated with Alzheimer's disease in APPswe/PS1dE9 transgenic mice. Nmnat2 delayed Wallerian degeneration in cultured superior cervical ganglia (SCGs) from morphological changes, microtubule destruction and neurofilament degradation, mutation of the conserved enzyme activity site in Nmnat2 disrupted its enzyme activity as well as the axon-protective function. Our results demonstrate that the brain-specific Nmnat2 delays injury-induced axon degeneration dependent on its NAD synthesis activity. These findings provide new clues to further study the molecular mechanisms of axon degeneration and the related neurodegenerative diseases.
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The axon-protective function of NMNAT2 in cultured neurons derived from the superior cervical ganglia requires NAD synthesis activity.
“For example, the axon-protective function of NMNAT2 in cultured neurons derived from the superior cervical ganglia requires NAD synthesis activity (90).”
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NMNAT1 and hereditary spastic paraplegia (HSP): expanding the phenotypic spectrum of NMNAT1 variants
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Biological Functions and Therapeutic Potential of NAD+ Metabolism in Gynecological Cancers
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Nicotinamide Adenine Dinucleotide (NAD+) Repletion Attenuates Bupivacaine-Induced Neurotoxicity
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NMNAT2-SARM1 Axis Drives Redox Failure and Disrupts APP Processing in NeuronsPreprint
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- Authors
- Yan, T., Feng, Y., Zheng, J., Ge, X., Zhang, Y., Wu, D., Zhao, J., & Zhai, Q.
- Affiliations
- Chinese Academy of Sciences (CN)
- Zhejiang Sci-Tech University (CN)
- Shanghai Institutes for Biological Sciences (CN)
- Corresponding author
- Zhai, Qiwei
- Venue
- Neurochemistry International
- Publisher
- Elsevier BV
- Published
- 2010-01
- Volume
- 56
- Issue
- 1
- Pages
- 101-106
- ISSN
- 0197-0186 (ISSN-L)
- OpenAlex
- W2138132658
- Cited by
- 92
- References
- 36
- Citations by year
- 2026: 4 · 2025: 6 · 2024: 3 · 2023: 4 · 2022: 6 · 2021: 4 · 2020: 3 · 2019: 6 · 2018: 4 · 2017: 2 · 2016: 6 · 2015: 3 · 2014: 7 · 2013: 12 · 2012: 9
- FWCI
- 3.03
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Neurochemistry International (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nerve injury and regeneration
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Hereditary Neurological Disorders
- Health Sciences › Medicine › Geriatrics and Gerontology › Sirtuins and Resveratrol in Medicine
- Keywords
- NMNAT2, nicotinamide mononucleotide adenylyltransferase, axonal degeneration, Wallerian degeneration, superior cervical ganglion, NAD+ synthesis, Alzheimer's disease, APP/PS1 mice, neurofilament degradation, axon protection, neurodegenerative diseases
- MeSH terms
- Animals, Axons, Cell Line, Cells, Cultured, Humans, Mice, Inbred C57BL, Mice, Transgenic, Microtubules, NAD, Nicotinamide-Nucleotide Adenylyltransferase, Time Factors, Wallerian Degeneration, Neurofilament Proteins, Cell Death, Rats, Sprague-Dawley, Superior Cervical Ganglion, Cytoprotection, Mice, Rats
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