Cited by 134Inflammasome and immune disordersNeuroinflammation and Neurodegeneration MechanismsTryptophan and brain disorders

NLRP3 inflammasome activation contributes to long-term behavioral alterations in mice injected with lipopolysaccharide

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Zhu, Wei, Cao, Feng-Sheng, Feng, Jun, Chen, Hua-Weng, Wan, Jie-Ru, Lu, Qing, Wang, Jian·2017·Neuroscience

Abstract

Lipopolysaccharide (LPS) might affect the central nervous system by causing neuroinflammation, which subsequently leads to brain damage and dysfunction. In this study, we evaluated the role of nod-like receptor pyrin domain-containing protein 3 (NLRP3) inflammasome activation in long-term behavioral alterations of 8-week-old male C57BL/6 mice injected intraperitoneally with LPS (5mg/kg). At different time points after injection, we assessed locomotor function with a 24-point neurologic deficit scoring system and the rotarod test; assessed recognition memory with the novel object recognition test; and assessed emotional abnormality (anhedonia and behavioral despair) with the tail suspension test, forced swim test, and sucrose preference test. We also assessed protein expression of NLRP3, apoptosis-associated speck-like protein (ASC), and caspase-1 p10 in hippocampus by Western blotting; measured levels of interleukin (IL)-1β, IL-18, tumor necrosis factor α (TNFα), and IL-10 in hippocampus; measured TNFα and IL-1β in serum by ELISA; and evaluated microglial activity in hippocampus by Iba1 immunofluorescence. We found that LPS-injected mice displayed long-term depression-like behaviors and recognition memory deficit; elevated expression of NLRP3, ASC, and caspase-1 p10; increased levels of IL-1β, IL-18, and TNFα; decreased levels of IL-10; and increased microglial activation. These effects were blocked by the NLRP3 inflammasome inhibitor Ac-Tyr-Val-Ala-Asp-chloromethylketone. The results demonstrate proof of concept that NLRP3 inflammasome activation contributes to long-term behavioral alterations in LPS-exposed mice, probably through enhanced inflammation, and that NLRP3 inflammasome inhibition might alleviate peripheral and brain inflammation and thereby ameliorate long-term behavioral alterations in LPS-exposed mice.

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Authors
Zhu, W., Cao, F.-S., Feng, J., Chen, H.-W., Wan, J.-R., Lu, Q., & Wang, J.
Affiliations
  • Johns Hopkins University (US)
  • Xiangyang Central Hospital (CN)
  • Tongji Hospital (CN)
Corresponding author
Wang, Jian
Venue
Neuroscience
Publisher
Elsevier BV
Published
2017-02
Volume
343
Pages
77-84
ISSN
0306-4522 (ISSN-L)
OpenAlex
W2559769511
Cited by
134
References
61
Citations by year
2026: 8 · 2025: 13 · 2024: 15 · 2023: 13 · 2022: 18 · 2021: 17 · 2020: 19 · 2019: 12 · 2018: 10 · 2017: 9
FWCI
5.37
Type
journal article
Language
en
Open access
Locations
  • Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (R01AT007317, R01NS078026)
  • Department of Anesthesiology and Critical Care Medicine, Johns Hopkins Medicine
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
Keywords
NLRP3 inflammasome, lipopolysaccharide, neuroinflammation, behavioral alterations, depression-like behavior, memory impairment, hippocampus, microglial activation, caspase-1, IL-1β, IL-18, TNF-α, IL-10, inflammasome inhibition, long-term behavioral effects
MeSH terms
NLR Family, Pyrin Domain-Containing 3 Protein, Amino Acid Chloromethyl Ketones, Animals, Anti-Inflammatory Agents, Depressive Disorder, Hippocampus, Lipopolysaccharides, Male, Memory Disorders, Mice, Inbred C57BL, Random Allocation, Microglia, Inflammasomes

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