Youth-associated protein helps restore healthy function in immune cells in the aging brain
Researchers at the Icahn School of Medicine at Mount Sinai have identified a role for the youth-associated protein TIMP2 in supporting the healthy function of microglia, the brain's resident immune cells.
Researchers from the Icahn School of Medicine at Mount Sinai have uncovered a role for a protein called TIMP2 in maintaining healthy function of microglia, the brain's resident immune cells. Published in Nature Communications, the study reveals that losing TIMP2 leads to microglia adopting several aging-related features and neurodegenerative traits.
Restoring TIMP2 in older mice's blood improved microglia's ability to clear debris and reduced inflammatory markers. This suggests TIMP2 could help preserve healthy immune function in the aging brain, a crucial factor given Alzheimer's disease's strong association with aging. Microglia, responsible for maintaining brain health by clearing cellular debris, supporting neural circuits, and responding to injury, become less efficient with age, potentially contributing to inflammation and impaired brain function.
The study's lead author, Joseph M. Castellano, suggests TIMP2's influence on microglial function bridges multiple critical processes for normal brain health. Using multiple mouse models, the researchers found that TIMP2 loss caused microglia to exhibit aging and injury-associated states, impaired debris clearance, and increased inflammatory proteins.
Supplementing aged mice with TIMP2 reversed some of these age-related changes, shifting microglia towards a healthier state and improving debris clearance. While further research is needed to confirm these findings in humans, the study provides valuable insights into potential therapeutic targets for age-related neurological disorders.
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