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COUNTERING AGE-ASSOCIATED ALTERATIONS IN OLIGODENDROCYTE-DERIVED EXTRACELLULAR MATRIX REJUVENATES COGNITION
Biorxiv : the Preprint Server for Biology
|February 12, 2026
Summary
Targeting oligodendrocyte-derived extracellular matrix (ECM) can reverse age-related memory loss. Increasing Hyaluronan and proteoglycan link protein 2 (HAPLN2) impairs cognition, while reducing it restores memory in aging mice.
Area of Science:
- Neuroscience
- Aging Research
- Cell Biology
Background:
- Age-related cognitive decline is often studied by targeting neurons, neglecting other brain cells.
- Oligodendrocytes, crucial for myelin maintenance, undergo age-related changes impacting brain function.
Purpose of the Study:
- To investigate the role of oligodendrocyte-derived extracellular matrix (ECM) in age-related cognitive decline.
- To identify specific ECM components dysregulated in the aging brain and their impact on memory.
Main Methods:
- Transcriptomic and proteomic analysis of oligodendrocytes from aged mice and humans.
- Investigating the function of Hyaluronan and proteoglycan link protein 2 (HAPLN2) in vivo.
- Assessing memory performance and synaptic plasticity in mouse models.
Main Results:
- Oligodendrocytes show age-associated transcriptional and proteomic changes, particularly in their matrisome.
- Increased Hyaluronan and proteoglycan link protein 2 (HAPLN2) in aged mice and humans correlates with cognitive impairment.
- Overexpression of HAPLN2 in young mice caused memory deficits, while reducing it in aged mice improved memory and synaptic plasticity.
Conclusions:
- Oligodendrocyte-derived ECM remodeling is a key feature of brain aging.
- Targeting HAPLN2 offers a potential therapeutic strategy to counteract age-related cognitive decline and restore memory function.
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