Related Experiment Video

Updated: Aug 25, 2026

Immunofluorescence Staining Using IBA1 and TMEM119 for Microglial Density, Morphology and Peripheral Myeloid Cell Infiltration Analysis in Mouse Brain
10:40

Immunofluorescence Staining Using IBA1 and TMEM119 for Microglial Density, Morphology and Peripheral Myeloid Cell Infiltration Analysis in Mouse Brain

Published on: October 27, 2019

Importance of MAPK pathways for microglial pro-inflammatory cytokine IL-1 beta production

Seon H Kim1, Carolyn J Smith, Linda J Van Eldik

  • 1Drug Discovery Program, Department of Cell and Molecular Biology, Northwestern University Feinberg School of Medicine, 303 East Chicago Avenue, Ward 4-202, Chicago, IL 60611-3008, USA. vaneldik@northwestern.edu

Neurobiology of Aging
|March 12, 2004
PubMed

Insights

In Alzheimer's disease, microglial activation of mitogen-activated protein kinase (MAPK) pathways drives interleukin (IL)-1beta production. Inhibiting these MAPK pathways reduces IL-1beta, suggesting distinct pathways for different activators.

Area of Science:

  • Neuroscience
  • Immunology
  • Cell Biology

Background:

  • Chronic glial activation in Alzheimer's disease (AD) contributes to neuroinflammation via molecules like interleukin (IL)-1beta.
  • Understanding the signaling pathways that control pro-inflammatory cytokine induction is crucial for AD research.
  • Investigating whether different stimuli activate distinct pathways in microglia is key to deciphering neuroinflammatory mechanisms.

Purpose of the Study:

  • To investigate the role of mitogen-activated protein kinase (MAPK) pathways in microglial IL-1beta production.
  • To determine if distinct activators utilize different signaling pathways to induce IL-1beta.
  • To establish a mechanistic link between MAPK activation and IL-1beta release in microglia.

Main Methods:

  • Microglial cultures were stimulated with lipopolysaccharide, S100B, or beta-amyloid.
  • Activation of p38, ERK1/2, and JNK MAPKs was measured.
  • IL-1beta levels were quantified in the presence of selective MAPK inhibitors.

Main Results:

  • Stimulation rapidly activated p38, ERK1/2, and JNK MAPKs, followed by increased IL-1beta levels.
  • Inhibition of each MAPK pathway dose-dependently reduced IL-1beta production.
  • The relative contribution of each MAPK pathway varied depending on the specific activating stimulus.

Conclusions:

  • MAPK pathways are essential for microglial IL-1beta production in the context of Alzheimer's disease.
  • Different glial activators employ distinct MAPK signaling pathways to induce IL-1beta.
  • These findings provide insights into the signaling mechanisms underlying neuroinflammation in AD.

More Related Videos

Isolation of Cortical Microglia with Preserved Immunophenotype and Functionality From Murine Neonates09:12

Isolation of Cortical Microglia with Preserved Immunophenotype and Functionality From Murine Neonates

Published on: January 30, 2014

Related Concept Videos

MAPK Signaling Cascades01:07

MAPK Signaling Cascades

Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
NF-κB-dependent Signaling Pathway02:26

NF-κB-dependent Signaling Pathway

The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
The JAK-STAT Signaling Pathway01:20

The JAK-STAT Signaling Pathway

Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as  SH2...