Cited by 217Neuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatmentsImmune Response and Inflammation

Osmotin attenuates LPS-induced neuroinflammation and memory impairments via the TLR4/NFκB signaling pathway

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Badshah, Haroon, Ali, Tahir, Kim, Myeong Ok·2016·Scientific Reports

Abstract

Toll-like receptor 4 (TLR4) signaling in the brain mediates autoimmune responses and induces neuroinflammation that results in neurodegenerative diseases, such as Alzheimer's disease (AD). The plant hormone osmotin inhibited lipopolysaccharide (LPS)-induced TLR4 downstream signaling, including activation of TLR4, CD14, IKKα/β, and NFκB, and the release of inflammatory mediators, such as COX-2, TNF-α, iNOS, and IL-1β. Immunoprecipitation demonstrated colocalization of TLR4 and AdipoR1 receptors in BV2 microglial cells, which suggests that osmotin binds to AdipoR1 and inhibits downstream TLR4 signaling. Furthermore, osmotin treatment reversed LPS-induced behavioral and memory disturbances and attenuated LPS-induced increases in the expression of AD markers, such as Aβ, APP, BACE-1, and p-Tau. Osmotin improved synaptic functionality via enhancing the activity of pre- and post-synaptic markers, like PSD-95, SNAP-25, and syntaxin-1. Osmotin also prevented LPS-induced apoptotic neurodegeneration via inhibition of PARP-1 and caspase-3. Overall, our studies demonstrated that osmotin prevented neuroinflammation-associated memory impairment and neurodegeneration and suggest AdipoR1 as a therapeutic target for the treatment of neuroinflammation and neurological disorders, such as AD.

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  1. Sambamurti K. et al. Gene structure and organization of the human beta-secretase (BACE) promoter. FASEB J. 18, 1034– 6 (2004). 15059975

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Authors
Badshah, H., Ali, T., & Kim, M. O.
Affiliations
Gyeongsang National University (KR)
Corresponding author
Kim, Myeong Ok
Venue
Scientific Reports
Published
2016-04-20
Volume
6
Issue
1
Pages
24493-24493
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2338113233
Cited by
217
References
52
Citations by year
2026: 6 · 2025: 18 · 2024: 23 · 2023: 14 · 2022: 32 · 2021: 21 · 2020: 38 · 2019: 20 · 2018: 23 · 2017: 18 · 2016: 4
FWCI
11.87
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Research Foundation
  • National Research Foundation of Korea (2012-0009521)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
Keywords
osmotin, neuroinflammation, memory impairment, TLR4 signaling, NF-κB signaling, lipopolysaccharide, AdipoR1, Alzheimer's disease, microglia, synaptic function, neurodegeneration, apoptosis, plant defense peptides, neuroprotection
MeSH terms
Animals, Astrocytes, Cell Line, Disease Models, Animal, Hippocampus, Inflammation, Lipopolysaccharides, Male, Memory Disorders, Synaptic Transmission, Plant Growth Regulators, Signal Transduction, Biomarkers, NF-kappa B, Apoptosis, Microglia, Maze Learning, Neurodegenerative Diseases, Toll-Like Receptor 4, Mice

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