Related Experiment Video
Updated: Dec 6, 2025
07:23
Magnetic Isolation of Microglial Cells from Neonate Mouse for Primary Cell Cultures
Published on: July 25, 2022
3.5K
Interleukin-10 Prevents Pathological Microglia Hyperactivation following Peripheral Endotoxin Challenge
Anat Shemer1, Isabelle Scheyltjens2, Gal Ronit Frumer1
1Department of Immunology, Weizmann Institute of Science, Rehovot 76100, Israel.
Immunity
|October 13, 2020
Summary
Interleukin-10 (IL-10) from non-microglial cells is crucial for brain immune cell (microglia) silencing after endotoxin challenge. This prevents harmful microglia overactivation and restores central nervous system homeostasis.
Area of Science:
- Neuroimmunology
- Central Nervous System (CNS) Research
- Innate Immunity
Background:
- Microglia, the brain's immune cells, play vital roles in CNS health and disease.
- Understanding how microglia return to a resting state after activation is critical but poorly understood.
- Specific patterns of microglia activation are linked to different brain pathologies.
Purpose of the Study:
- To investigate the role of the interleukin-10 (IL-10) signaling pathway in restoring microglia homeostasis after an endotoxin challenge.
- To elucidate the mechanisms by which microglia achieve quiescence following inflammatory stimuli.
Main Methods:
- Utilized lipopolysaccharide (LPS) to induce peripheral endotoxin challenge in murine models.
- Generated mice with IL-10 receptor-deficient microglia to assess IL-10's role.
- Introduced tumor necrosis factor (TNF) deficiency in microglia to observe rescue effects.
- Performed single-cell transcriptome analysis to identify IL-10 producing cells and gene expression profiles.
Main Results:
- Mice with IL-10 receptor-deficient microglia showed severe neuronal impairment and mortality following LPS challenge.
- A deficiency in microglial tumor necrosis factor (TNF) rescued these mice, indicating a microglia-centric pathological circuit.
- Single-cell sequencing identified IL-10-producing immune cells in the CNS, including NK cells and neutrophils, but not microglia.
- Characterized the temporal dynamics of microglia activation and subsequent silencing post-challenge.
Conclusions:
- Non-microglial IL-10 is essential for preventing excessive microglia activation and subsequent pathology after endotoxin exposure.
- The IL-10 axis, primarily from extrinsic sources, is critical for resolving neuroinflammation and maintaining CNS homeostasis.
- This study defines the kinetics of microglia response and highlights a key regulatory mechanism for brain immune quiescence.
