Abstract
Tumor necrosis factor-alpha (TNFα) regulates neuronal excitability. We investigated whether alterations in the level of TNFα occur at a time point that precedes the reported seizure-associated hyperexcitability of hippocampal networks in pre-plaque models of Alzheimer's disease (AD). Western blot and ELISA experiments indicated a significant increase in hippocampal TNFα expression in 1-month-old TgCRND8 mice that correlated with levels of the β-C-terminal fragment (βCTF) of amyloid-β protein precursor. CD11b labeling indicated changes in microglial morphology toward an activated state, suggesting that these cells may be a putative source of the observed TNFα increase during this pre-symptomatic stage of AD-like pathology.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Age Factors
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Alzheimer Disease / genetics
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Alzheimer Disease / pathology*
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Amyloid beta-Protein Precursor / chemistry
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Amyloid beta-Protein Precursor / genetics*
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Amyloid beta-Protein Precursor / metabolism*
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Animals
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CD11b Antigen / metabolism
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Calcium-Binding Proteins / metabolism
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Disease Models, Animal
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Enzyme-Linked Immunosorbent Assay
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Gene Expression Regulation / genetics
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Glial Fibrillary Acidic Protein / metabolism
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Hippocampus / metabolism*
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Hippocampus / pathology
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Humans
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Mice
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Mice, Transgenic
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Microfilament Proteins / metabolism
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Microglia / metabolism
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Mutation / genetics*
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Tumor Necrosis Factor-alpha / metabolism*
Substances
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Aif1 protein, mouse
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Amyloid beta-Protein Precursor
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CD11b Antigen
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Calcium-Binding Proteins
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Glial Fibrillary Acidic Protein
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Microfilament Proteins
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Tumor Necrosis Factor-alpha