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Bis(ethylmaltolato)oxidovanadium (IV) alleviates neuronal apoptosis through regulating peroxisome proliferator-activated receptor γ in a triple transgenic animal model of Alzheimer’s disease

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Abstract

Endoplasmic reticulum stress (ER stress) plays a critical role in neuronal apoptosis along with the aggravation of Alzheimer’s disease (AD). Nuclear receptor peroxisome proliferator-activated receptor gamma (PPARγ) is a ligand-activated transcription factor that is involved in regulating ER stress in Alzheimer’s disease (AD), therefore, this protein could be a promising therapeutic target for AD. Vanadium compounds, such as vanadyl acetylacetonate, sodium metavanadate and bis(maltolato)oxovanadium, are well-known as puissant PPARγ modulators. Thus, we are curious whether bis(ethylmaltolato)oxidovanadium (IV) (BEOV) can ameliorate ER stress and subsequent neuronal apoptosis by regulating PPARγ in AD models. To this end, we determined the effect of BEOV on behavioral performance, ER stress and neuronal apoptosis in the triple transgenic mouse AD model (3×Tg-AD). Our results showed that BEOV improved cognitive abilities and reduced the ER stress- and apoptosis-associated proteins in the brains of 3×Tg-AD mice. In vitro administration of BEOV in primary hippocampal neurons and N2asw cells achieved similar results in repressing ER stress. In addition, cotreatment with GW9662 (an antagonist of PPARγ) effectively blocked these neuroprotective effects of BEOV, which provided strong evidence that PPARγ-dependent signaling plays a key role in protecting against ER stress and neuronal apoptosis in AD. In conclusion, our data demonstrated that BEOV alleviated neuronal apoptosis triggered by ER stress by regulating PPARγ in a 3×Tg-AD model.

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Acknowledgements

We would like to thank the Instrumental Analysis Center of Shenzhen University (Xili Campus) for offering access to the experimental instruments.

Funding

This study was financially supported by grants from the National Natural Science Foundation of China (21877081; 31700919), Shenzhen Science and Technology Innovation Commission [JCYJ20180507182417779], Shenzhen-Hong Kong Institute of brain Science-Shenzhen Fundamental Research institutions (No. 2019SHIBS0003).

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Authors and Affiliations

  1. Shenzhen Key Laboratory of Marine Biotechnology and Ecology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518055, Guangdong, China

    Zhijun He, Jianxi Song, Xuexia Li, Xiaoqian Li, Huazhang Zhu, Chong Wu, Wen Xiao, Xiubo Du, Jiazuan Ni, Nan Li & Qiong Liu

  2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China

    Zhijun He, Xuexia Li & Jiazuan Ni

  3. Shenzhen Bay Laboratory, Shenzhen, 518055, China

    Nan Li

  4. Shenzhen-Hong Kong Institute of Brain Science, Shenzhen, 518033, China

    Qiong Liu

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  1. Zhijun He
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Contributions

QL and NL designed the study. ZJH, JXS, CW, HZZ, XXL and WX performed the majority of behavioral experiments and analyzed the data. ZJH and XQL performed the in vitro experiments and analyzed the data. NL and ZJH co-wrote the manuscript. NL, JZN and XBD contributed in interpreting the results. All authors reviewed and concurred with the final manuscript.

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Correspondence to Nan Li or Qiong Liu.

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Animal experiments were performed in compliance with the institutional guidelines at Shenzhen University. The protocol was approved by the Laboratory Animal Ethics Committee of Shenzhen University (Permit Number: AEWC-20140615-002).

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He, Z., Song, J., Li, X. et al. Bis(ethylmaltolato)oxidovanadium (IV) alleviates neuronal apoptosis through regulating peroxisome proliferator-activated receptor γ in a triple transgenic animal model of Alzheimer’s disease. J Biol Inorg Chem 26, 551–568 (2021). https://doi.org/10.1007/s00775-021-01874-8

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