Apolipoprotein E deficiency exacerbates spinal cord injury in mice: inflammatory response and oxidative stress mediated by NF-κB signaling pathway
Open accessAbstract
Spinal cord injury (SCI) is a severe neurological trauma that involves complex pathological processes. Inflammatory response and oxidative stress are prevalent during the second injury and can influence the functional recovery of SCI. Specially, Apolipoprotein E (APOE) induces neuronal repair and nerve regeneration, and the deficiency of Apoe impairs spinal cord-blood-barrier and reduces functional recovery after SCI. However, the mechanism by which Apoe mediates signaling pathways of inflammatory response and oxidative stress in SCI remains largely elusive. This study was designed to investigate the signaling pathways that regulate Apoe deficiency-dependent inflammatory response and oxidative stress in the acute stage of SCI. In the present study, Apoe-/- mice retarded functional recovery and had a larger lesion size when compared to wild-type mice after SCI. Moreover, deficiency of Apoe induced an exaggerated inflammatory response by increasing expression of IL-6 and IL-1β, and increased oxidative stress by reducing expression of Nrf2 and HO-1. Furthermore, lack of Apoe promoted neuronal apoptosis and decreased neuronal numbers in the anterior horn of the spinal cord after SCI. Mechanistically, we found that the absence of Apoe increased inflammation and oxidative stress through activation of NF-κB after SCI. In contrast, an inhibitor of nuclear factor-κB (NF-κB) (Pyrrolidine dithiocarbamate) alleviates these changes. Collectively, these results indicate that a critical role for activation of NF-κB in regulating Apoe-deficiency dependent inflammation and oxidative stress is detrimental to recovery after SCI.
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ApoE knockout activates the NF-κB pathway.
“activation of the NF-κB pathway by ApoE knockout has also been reported (56)”
From Nuclear SphK2/S1P signaling is a key regulator of ApoE production and Aβ uptake in astrocytes (2024) · cites this paper as [56]
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Cited by
Sorted by citations
Nuclear SphK2/S1P signaling is a key regulator of ApoE production and Aβ uptake in astrocytes
Komai, M., Noda, Y., Ikeda, A., Kaneshiro, N., Kamikubo, Y., Sakurai, T., Uehara, T., & Takasugi, N. (2024) · Journal of Lipid Research · doi:10.1016/j.jlr.2024.100510 · Cited by 13 · see citing works
- Authors
- Yang, X., Chen, S., Shao, Z., Li, Y., Wu, H., Li, X., Mao, L., Zhou, Z., Bai, L., Mei, X., & Liu, C.
- Affiliations
- Jinzhou Medical University (CN)
- First Hospital of China Medical University (CN)
- Corresponding author
- Mei, Xifan
- Liu, Chang
- Venue
- Frontiers in Cellular Neuroscience
- Publisher
- Frontiers Media SA
- Published
- 2018-05-23
- Volume
- 12
- Pages
- 142-142
- ISSN
- 1662-5102 (ISSN-L)
- PMC
- PMC5974465
- OpenAlex
- W2800347147
- Cited by
- 52
- References
- 8
- Citations by year
- 2026: 8 · 2025: 5 · 2024: 6 · 2023: 5 · 2022: 5 · 2021: 10 · 2020: 3 · 2019: 8 · 2017: 1
- FWCI
- 3.89
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Frontiers in Cellular Neuroscience (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Funders
- National Natural Science Foundation of China (31471138, 81671907, 81701898)
- Topics
- Health Sciences › Medicine › Pathology and Forensic Medicine › Spinal Cord Injury Research
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nerve injury and regeneration
- Health Sciences › Medicine › Neurology › Traumatic Brain Injury and Neurovascular Disturbances
- Keywords
- spinal cord injury, apolipoprotein E deficiency, NF-κB signaling, neuroinflammation, oxidative stress, Nrf2/HO-1 pathway, interleukin-6, IL-1β, neuronal apoptosis, pyrrolidine dithiocarbamate, functional recovery, lesion size, ApoE-deficient mice
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