What this means
Researchers removed a lipid enzyme from brain stem cells in mice. The mice showed better brain signaling and memory tests. This was done in mice, so it does not show the same effect in people.
Plain-English summary written by an AI model from the abstract. The original is below.
- Who it was tested in
- Mice
- Kind of research
- Research in animals or cells
The science
- Original title
- Suppressing neural stem cell PLA2G7 restores inhibitory circuit function and improves cognition in aging mice.
- Authors
- Wu F, Wu Y, Qin B et al.
- Journal
- Nature aging
- Published
- Oct 14, 2026
- Study type
- Lab or animal study · indexed as animal research
- PMID
- 42875584 ↗
Abstract
Age-related cognitive decline is associated with altered inhibitory signaling in hippocampal circuits, but the mechanisms underlying this dysfunction remain incompletely understood. Neural stem cells (NSCs) persist in the adult hippocampus and influence brain function beyond generating new neurons, although the molecular signals involved remain unclear. Here we show that phospholipase A2 group VII (PLA2G7), a secreted lipid-metabolizing enzyme expressed in NSCs, negatively regulates inhibitory circuit function in the dentate gyrus. Conditional deletion of Pla2g7 in NSCs enhanced inhibitory inputs onto dentate granule cells and improved hippocampal cognition. Lipidomic profiling revealed PLA2G7-dependent remodeling of phospholipid composition, linking NSC-derived lipid metabolism to inhibitory synaptic regulation. Supplementation with phosphatidylcholine rescued PLA2G7-associated inhibitory synapse deficits. In aged mice, PLA2G7 suppression restored inhibitory circuit function, partially normalized circuit imbalance and improved cognition. These findings identify a non-neurogenic mechanism through which NSCs modulate hippocampal circuits and suggest PLA2G7 as a target for promoting cognitive function during aging.
Wu F, Wu Y, Qin B et al. Suppressing neural stem cell PLA2G7 restores inhibitory circuit function and improves cognition in aging mice. Nature aging. 2026. doi:10.1038/s43587-026-01202-2. PMID: 42875584. https://pubmed.ncbi.nlm.nih.gov/42875584/
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