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E2F1 Mediates Traumatic Brain Injury and Regulates BDNF-AS to Promote the Progression of Alzheimer’s Disease

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Abstract

Traumatic brain injury (TBI) is one of the important risk factors for the development of Alzheimer’s disease (AD). However, the molecular mechanism by which TBI promotes the progression of AD is not elucidated. In this study, we showed that the abnormal production of E2F1 is a major factor in promoting the neuropathological and cognitive deterioration of AD post-TBI. We found that repeated mild TBI can aggravate the neuropathology of AD in APP/PS1 mice. At the same time, the co-expression of E2F1 and beta-site APP cleaving enzyme 1 (BACE1) was upregulated when the mouse hippocampus was dissected. BACE1 is recognized as a rate-limiting enzyme for the production of Aβ. Here, we speculate that E2F1 may play a role in promoting BACE1 expression in AD. Therefore, we collected peripheral blood from patients with AD. Interestingly, there is a positive correlation between E2F1 and brain-derived neurotrophic factor–antisense (BDNF-AS), whereas BDNF-AS in AD can promote the expression of BACE1 and exhibit a neurotoxic effect. We established a cell model and found a regulatory relationship between E2F1 and BDNF-AS. Therefore, based on our results, we concluded that E2F1 regulates BDNF-AS, promotes the expression of BACE1, and affects the progression of AD. Furthermore, E2F1 mediates the TBI-induced neurotoxicity of AD.

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All the data and materials supporting the conclusions were included in the  main paper.

Abbreviations

BDNF-AS:

Brain-derived nutritional factor antisense RNA

TBI:

Traumatic brain injury

BACE1:

Beta-site APP cleaving enzyme 1

RA:

Retinoic acid

LncRNA:

Long non-coding RNA

NIA-AA:

National Institute on Aging–Alzheimer’s Association

shRNA:

Short hairpin RNA

siRNA:

Small interfering RNA

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Acknowledgements

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Funding

This work was supported by the National Natural Science Foundation of China (82171296); the Joint Open Project of Jiangsu Key Laboratory for Tumor Biotherapy (XZSYSKF2020006); Science and Technology project of Changshu Health Commission (csws202010); Science and Technology project of Changshu No. 2 People’s Hospital (CSEY2021010); and Science and Technology project of “ke jiao xing wei” in Suzhou city (KJXW2021068). Basic and clinical transformation of non-coding RNA in Jiangsu Province Key laboratory open subject (202266).

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Contributions

YJC and YTD designed the experiments. YTD, WKL, and ZW carried out the experiments. YJC and YTD provided the technical support. YJC, YTD, WKL, and ZW analyzed and compiled the data. YTD and WKL prepared the manuscript. The author(s) read and approved the final manuscript.

Corresponding author

Correspondence to Yongjun Cao.

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Ding, Y., Luan, W., Shen, X. et al. E2F1 Mediates Traumatic Brain Injury and Regulates BDNF-AS to Promote the Progression of Alzheimer’s Disease. Neurotox Res 42, 17 (2024). https://doi.org/10.1007/s12640-024-00695-2

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  • DOI: https://doi.org/10.1007/s12640-024-00695-2

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