Volume 6, Issue 5 e70156
ORIGINAL ARTICLE
Open Access

DEAD-Box Helicase 6 Blockade in Brain-Derived Aβ Oligomers From Alzheimer's Disease Patients Attenuates Neurotoxicity

Xiaoxu Wang

Xiaoxu Wang

Department of Laboratory Animal Sciences, School of Basic Medical Sciences, Capital Medical University, Beijing, China

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Lu Dai

Lu Dai

Department of Laboratory Animal Sciences, School of Basic Medical Sciences, Capital Medical University, Beijing, China

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Na Wu

Na Wu

Laboratory Animal Resource Center, Capital Medical University, Beijing, China

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Donghui Wu

Donghui Wu

Department of Laboratory Animal Sciences, School of Basic Medical Sciences, Capital Medical University, Beijing, China

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Xinyuan Wang

Xinyuan Wang

Department of Laboratory Animal Sciences, School of Basic Medical Sciences, Capital Medical University, Beijing, China

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Xia Meng

Xia Meng

Laboratory Animal Resource Center, Capital Medical University, Beijing, China

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Qilei Zhang

Qilei Zhang

Department of Anatomy and Neurobiology, Central South University Xiangya School of Medicine, Changsha, Hunan, China

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Jing Lu

Jing Lu

Department of Laboratory Animal Sciences, School of Basic Medical Sciences, Capital Medical University, Beijing, China

Laboratory Animal Resource Center, Capital Medical University, Beijing, China

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Xiaoxin Yan

Xiaoxin Yan

Department of Anatomy and Neurobiology, Central South University Xiangya School of Medicine, Changsha, Hunan, China

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Jing Zhang

Corresponding Author

Jing Zhang

Department of Laboratory Animal Sciences, School of Basic Medical Sciences, Capital Medical University, Beijing, China

Laboratory Animal Resource Center, Capital Medical University, Beijing, China

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Baian Chen

Corresponding Author

Baian Chen

Department of Laboratory Animal Sciences, School of Basic Medical Sciences, Capital Medical University, Beijing, China

Laboratory Animal Resource Center, Capital Medical University, Beijing, China

Center of Alzheimer's Disease, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China

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First published: 24 April 2025

Xiaoxu Wang and Lu Dai contributed equally to this work.

Funding: This work was supported by the National Natural Science Foundation of China (No. 82001146) and the R&D Program of Beijing Municipal Education Commission (No. KM202110025028). Postmortem human brain tissue samples were collected from the Xiangya Human Brain Tissue Bank, which is funded by the National Natural Science Foundation of China (Nos. 91632116 and 82071223), the Ministry of Science and Technology Innovation 2030: Brain Science and Brain Research Institute major project (No. 2021ZD0201100), and the R&D Support Project No. 3: Construction of Brain Bank Collaborative Network Platform in South-Central China (No. 2021ZD0201103).

ABSTRACT

There are no effective curative treatments for Alzheimer's disease (AD), the most prevalent form of dementia. Amyloid-beta (Aβ) oligomers are considered key neurotoxic molecules that trigger AD. Recent studies have shown that direct antibody targeting of Aβ oligomers is beneficial for early AD patients; however, serious side effects (e.g., brain hemorrhage, edema, and shrinkage) persist. Considering that Aβ oligomers readily bind to other proteins, contributing to neurotoxicity and AD onset, those proteins could represent alternative therapeutic targets. However, proteins that bind to Aβ oligomers in the brains of AD patients have not yet been identified. In this study, we identified four proteins (DDX6, DSP, JUP, and HRNR) that bind to Aβ oligomers derived from the brains of AD patients. Intriguingly, among these four proteins, only the blockade of DEAD-box helicase 6 (DDX6) in human-derived Aβ oligomers attenuated their neurotoxicity both in vitro and in vivo. Mechanistic analysis revealed that DDX6 promotes the formation of Aβ oligomers, likely due to DDX6 bind to Aβ oligomers at four distinct sites. These findings suggest that DDX6 could serve as a potential therapeutic target to reduce the neurotoxicity of Aβ oligomers in the brain and prevent the progression of AD.

Conflicts of Interest

The authors declare no conflicts of interest.

Data Availability Statement

All data generated or analyzed during this study are included in this published article and its Supporting Information.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.