Glial activation links early-life seizures and long-term neurologic dysfunction: evidence using a small molecule inhibitor of proinflammatory cytokine upregulation.

Somera-Molina, K.C., Robin B., Somera, C.A., Anderson, C., Stine, C., Koh, S., Behanna, H.A., Van Eldik, L.J., Watterson, D.M., Wainwright, M.S.
Journal   Epilepsia.
Species  
Analytes Measured   IL-6
Matrix Tested   Brain homogenates (hippocampal homogenates)
Year   2007
Volume   48
Page Numbers   1785-800
Application   Alzheimers
Abstract
PURPOSE: Early-life seizures increase vulnerability to subsequent neurologic insult. We tested the hypothesis that early-life seizures increase susceptibility to later neurologic injury by causing chronic glial activation. To determine the mechanisms by which glial activation may modulate neurologic injury, we examined both acute changes in proinflammatory cytokines and long-term changes in astrocyte and microglial activation and astrocyte glutamate transporters in a "two-hit" model of kainic acid (KA)-induced seizures.

METHODS: Postnatal day (P) 15 male rats were administered KA or phosphate buffered saline (PBS). On P45 animals either received a second treatment of KA or PBS. On P55, control (PBS-PBS), early-life seizure (KA-PBS), adult seizure (PBS-KA), and "two-hit" (KA-KA) groups were examined for astrocyte and microglial activation, alteration in glutamate transporters, and expression of the glial protein, clusterin.

RESULTS: P15 seizures resulted in an acute increase in hippocampal levels of IL-1beta and S100B, followed by behavioral impairment and long-term increases in GFAP and S100B. Animals in the "two-hit" group showed greater microglial activation, neurologic injury, and susceptibility to seizures compared to the adult seizure group. Glutamate transporters increased following seizures but did not differ between these two groups. Treatment with Minozac, a small molecule inhibitor of proinflammatory cytokine upregulation, following early-life seizures prevented both the long-term increase in activated glia and the associated behavioral impairment.

CONCLUSIONS: PURPOSE: Early-life seizures increase vulnerability to subsequent neurologic insult. We tested the hypothesis that early-life seizures increase susceptibility to later neurologic injury by causing chronic glial activation. To determine the mechanisms by which glial activation may modulate neurologic injury, we examined both acute changes in proinflammatory cytokines and long-term changes in astrocyte and microglial activation and astrocyte glutamate transporters in a "two-hit" model of kainic acid (KA)-induced seizures.

METHODS: Postnatal day (P) 15 male rats were administered KA or phosphate buffered saline (PBS). On P45 animals either received a second treatment of KA or PBS. On P55, control (PBS-PBS), early-life seizure (KA-PBS), adult seizure (PBS-KA), and "two-hit" (KA-KA) groups were examined for astrocyte and microglial activation, alteration in glutamate transporters, and expression of the glial protein, clusterin.

RESULTS: P15 seizures resulted in an acute increase in hippocampal levels of IL-1beta and S100B, followed by behavioral impairment and long-term increases in GFAP and S100B. Animals in the "two-hit" group showed greater microglial activation, neurologic injury, and susceptibility to seizures compared to the adult seizure group. Glutamate transporters increased following seizures but did not differ between these two groups. Treatment with Minozac, a small molecule inhibitor of proinflammatory cytokine upregulation, following early-life seizures prevented both the long-term increase in activated glia and the associated behavioral impairment.

CONCLUSIONS: These data suggest that glial activation following early-life seizures results in increased susceptibility to seizures in adulthood, in part through priming microglia and enhanced microglial activation. Glial activation may be a novel therapeutic target in pediatric epilepsy.

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V-PLEX Plus NHP IL-6 Kit
IL-6 | Non-human primate
Singleplex
V-PLEX Plus Proinflammatory Panel 1 NHP Kit
IFN-γ, IL-1β, IL-2, IL-6, IL-8, IL-10 | Non-human primate
Multiplex
V-PLEX Proinflammatory Panel 1 NHP Kit
IFN-γ, IL-1β, IL-2, IL-6, IL-8, IL-10 | Non-human primate
Multiplex
Human IL-6 Antibody Bulk Product
IL-6
Mouse IL-6 Antibody
IL-6
Rat IL-6 Antibody
IL-6
V-PLEX Human Cytokine 30-Plex Kit
Eotaxin, Eotaxin-3, GM-CSF, IFN-γ, IL-1α, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-7, IL-8, IL-8 (HA), IL-10, IL-12/IL-23p40, IL-12p70, IL-13, IL-15, IL-16, IL-17A, IP-10, MCP-1, MCP-4, MDC, MIP-1α, MIP-1β, TARC, TNF-α, TNF-β, VEGF-A | Human
Multiplex
V-PLEX Human IL-6 Kit
IL-6 | Human
Singleplex
V-PLEX Human Proinflammatory Panel I (4-Plex)
IFN-γ, IL-1β, IL-6, TNF-α | Human
Multiplex
V-PLEX Human Proinflammatory Panel II (4-Plex)
IL-1β, IL-6, IL-8, TNF-α | Human
Multiplex
V-PLEX Mouse IL-6 Kit
IL-6 | Mouse
Singleplex
V-PLEX Plus Human Cytokine 30-Plex Kit
Eotaxin, Eotaxin-3, GM-CSF, IFN-γ, IL-1α, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-7, IL-8, IL-8 (HA), IL-10, IL-12/IL-23p40, IL-12p70, IL-13, IL-15, IL-16, IL-17A, IP-10, MCP-1, MCP-4, MDC, MIP-1α, MIP-1β, TARC, TNF-α, TNF-β, VEGF-A | Human
Multiplex
V-PLEX Plus Human IL-6 Kit
IL-6 | Human
Singleplex
V-PLEX Plus Human Proinflam. Panel I (4-Plex)
IFN-γ, IL-1β, IL-6, TNF-α | Human
Multiplex
V-PLEX Plus Human Proinflam. Panel II (4-Plex)
IL-1β, IL-6, IL-8, TNF-α | Human
Multiplex
V-PLEX Plus Mouse IL-6 Kit
IL-6 | Mouse
Singleplex
V-PLEX Plus Proinflammatory Panel 1 Human Kit
IFN-γ, IL-1β, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12p70, IL-13, TNF-α | Human
Multiplex
V-PLEX Plus Proinflammatory Panel1 Mouse Kit
IFN-γ, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-10, IL-12p70, KC/GRO, TNF-α | Mouse
Multiplex
V-PLEX Plus Rat IL-6 Kit
IL-6 | Rat
Singleplex
V-PLEX Proinflammatory Panel 1 Human Kit
IFN-γ, IL-1β, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12p70, IL-13, TNF-α | Human
Multiplex
V-PLEX Proinflammatory Panel 1 Mouse Kit
IFN-γ, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-10, IL-12p70, KC/GRO, TNF-α | Mouse
Multiplex
V-PLEX Rat IL-6 Kit
IL-6 | Rat
Singleplex
Proinflammatory Panel 1 Human Control Pack
IFN-γ, IL-1β, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12p70, IL-13, TNF-α | Human
Proinflammatory Panel 1 Mouse Control Pack
IFN-γ, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-10, IL-12p70, KC/GRO, TNF-α | Mouse
Proinflammatory Panel 1 Rat Control Pack
IFN-γ, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-10, IL-13, KC/GRO, TNF-α | Rat
Human ProInflammatory-4 II Tissue Culture Kit
IL-1β, IL-6, IL-8, TNF-α | Human
Multiplex
Human IL-6 Tissue Culture Kit
IL-6 | Human
Singleplex
Human ProInflammatory 7-Plex Tissue Culture Kit
IFN-γ, IL-1β, IL-6, IL-8, IL-10, IL-12p70, TNF-α | Human
Multiplex
Human ProInflammatory 9-Plex Tissue Culture Kit
GM-CSF, IFN-γ, IL-1β, IL-2, IL-6, IL-8, IL-10, IL-12p70, TNF-α | Human
Multiplex
Human ProInflammatory-4 I Tissue Culture Kit
IFN-γ, IL-1β, IL-6, TNF-α | Human
Multiplex
Canine ProInflammatory Panel 3 Ultra-Sensitive Kit
IL-2, IL-6, IL-8, TNF-α | Canine
Multiplex
MA6000 Rat IL-6 384 Tissue Culture Kit
IL-6 | Rat
Singleplex
Mouse ProInflammatory 7-Plex Tissue Culture Kit
IFN-γ, IL-1β, IL-6, IL-10, IL-12p70, KC/GRO, TNF-α | Mouse
Multiplex
MA6000 Mouse IL-6 384 Tissue Culture Kit
IL-6 | Mouse
Singleplex
MS6000 Human ProInflammatory-4 II 384 Tissue Culture Kit
IL-6, IL-8 | Human
Multiplex
Mouse IL-6 Tissue Culture Kit
IL-6 | Mouse
Singleplex
V-PLEX Mouse Cytokine 29-Plex Kit
IFN-γ, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-9, IL-10, IL-12p70, IL-15, IL-16, IL-17A, IL-17A/F, IL-17C, IL-17E/IL-25, IL-17F, IL-21, IL-22, IL-23, IL-27p28/IL-30, IL-31, IL-33, IP-10, KC/GRO, MCP-1, MIP-1α, MIP-2, MIP-3α, TNF-α | Mouse
Multiplex
U-PLEX Biomarker Group 1 NHP Assays
CTACK, ENA-78, Eotaxin, Eotaxin-2, Eotaxin-3, FLT3L, Fractalkine, G-CSF, GM-CSF, GRO-α, I-309, IFN-α2a, IFN-γ, IL-1α, IL-1β, IL-1RA, IL-2, IL-2Rα, IL-4, IL-5, IL-6, IL-7, IL-8, IL-9, IL-10, IL-12/IL-23p40, IL-12p70, IL-13, IL-15, IL-16, IL-17A, IL-17A/F, IL-17B, IL-17C, IL-17D, IL-17F, IL-18, IL-22, IL-23, IP-10, I-TAC, MCP-1, MCP-2, MCP-3, MCP-4, M-CSF, MDC, MIF, MIP-1α, MIP-1β, MIP-3α, MIP-3β, MIP-5, SDF-1α, TARC, TGF-β1, TGF-β2, TGF-β3, TNF-α, TNF-β, TPO, TRAIL, VEGF-A, YKL-40 | Non-human primate
MA6000 Human IL-6 384 Tissue Culture Kit
IL-6 | Human
Singleplex
V-PLEX Plus Mouse Cytokine 29-Plex Kit
IFN-γ, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-9, IL-10, IL-12p70, IL-15, IL-16, IL-17A, IL-17A/F, IL-17C, IL-17E/IL-25, IL-17F, IL-21, IL-22, IL-23, IL-27p28/IL-30, IL-31, IL-33, IP-10, KC/GRO, MCP-1, MIP-1α, MIP-2, MIP-3α, TNF-α | Mouse
Multiplex
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