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NLRP3 Inflammasome Inhibitor Ameliorates Amyloid Pathology in a Mouse Model of Alzheimer’s Disease

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Abstract

The activation of the NLRP3 inflammasome signaling pathway plays an important role in the neuroinflammation in Alzheimer’s disease (AD). In this study, we investigated the effects of JC-124, a rationally designed NLRP3 inflammasome inhibitor, on AD-related deficits in CRND8 APP transgenic mice (TgCRND8). We first demonstrated increased formation and activation of NLRP3 inflammasome in TgCRND8 mice compared to non-transgenic littermate controls, which was inhibited by the treatment with JC-124. Importantly, JC-124 treatment led to decreased levels of Aβ deposition and decreased levels of soluble and insoluble Aβ1–42 in the brain of CRND8 mice which was accompanied by reduced β-cleavage of APP, reduced activation of microglia but enhanced astrocytosis. Oxidative stress was decreased and synaptophysin was increased in the CRND8 mice after JC-124 treatment, demonstrating a neuroprotective effect. Overall, these data demonstrated beneficial effects of JC-124 as a specific NLRP3 inflammasome inhibitor in AD mouse model and supported the further development of NLRP3 inflammasome inhibitors as a viable option for AD therapeutics.

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Acknowledgements

The work was supported in part by the National Institute on Aging of the National Institutes of Health [R01NS083385 and RFAG049479 to X.Z. and R01AG041161 to S.Z.]; Alzheimer’s Association [AARG-16-443584 to X.Z.]; Dr. Robert M. Kohrman Memorial Fund to X.Z., Alzheimer’s Drug Discovery Foundation [20150601 to S.Z.]; and the National Natural Sciences Foundation of China [81100594 to J.Y.].

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Correspondence to Shijun Zhang or Xiongwei Zhu.

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Yin, J., Zhao, F., Chojnacki, J.E. et al. NLRP3 Inflammasome Inhibitor Ameliorates Amyloid Pathology in a Mouse Model of Alzheimer’s Disease. Mol Neurobiol 55, 1977–1987 (2018). https://doi.org/10.1007/s12035-017-0467-9

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