NLRP3 inflammasome activity shifts toward regulating cell fate in aged macrophages
Inhibiting the NLRP3 inflammasome with MCC950 reduced apoptosis but increased senescence in aged bone marrow-derived macrophages.
Bulletin of experimental biology and medicine · Blagova AV et al. · Paper published 28 Sep 2026
In aged bone marrow-derived macrophages, researchers investigated the functional remodeling of the NLRP3 inflammasome during aging. Upon stimulation with lipopolysaccharide, the cells did not show an increase in proinflammatory cytokine secretion. Instead, NLRP3 activation was accompanied by increased DNA fragmentation. Pharmacological inhibition of the inflammasome using MCC950 attenuated apoptosis, but it simultaneously increased the proportion of senescent cells. These results indicate a shift from apoptotic cell death toward cellular senescence. In aged macrophages, NLRP3 activity shifts away from a predominantly proinflammatory role to participating in the regulation of apoptosis, senescence, and cell survival.
Why it matters
These findings show that NLRP3 regulates cell survival decisions rather than simple inflammation in older cells. This functional shift highlights the need for caution when designing NLRP3-inhibiting therapies for age-associated conditions.
Caveats
The study was conducted exclusively in cultured cells, and the abstract does not specify the donor species, sample size, or in vivo effects.
Written from the paper’s abstract, and every claim checked against it before publishing. Read the paper for the full methods and data.
The paper
Functional Shift of NLRP3 Inflammasome Activity in Aged Macrophages
Blagova AV, Satish A, Berdnikov AK et al.
Bulletin of experimental biology and medicine · 28 Sep 2026 · Peer-reviewed
- Relevance
- Core geroscience
- News value
- Notable
- Evidence
- Cells
- Status
- Peer-reviewed
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