A nanoparticle-based enrichment workflow coupled with data-independent acquisition mass spectrometry enables deep, quantitative proteomic profiling of mouse serum from very small sample volumes. Applied across a cross-sectional aging cohort, the method identified circulating proteins that shift with age and have counterparts relevant to human health. The approach removes a longstanding technical barrier in serial, low-volume blood sampling for aging studies.
Key Points
- Nanoparticle enrichment enables deep proteomics from microliter serum volumes
- Cross-sectional mouse cohort reveals age-associated circulating protein signatures
- Identified proteins carry translational relevance to human aging biology
Longevity Analysis
Blood carries a continuous readout of how tissues are functioning, and the ability to extract thousands of protein measurements from a few microliters makes repeated sampling across a lifespan feasible rather than terminal. Age-associated proteins in circulation reflect shifts in immune surveillance, tissue repair capacity, and metabolic signaling long before overt pathology appears, which is precisely the window where intervention changes trajectory. Measurement precision at this depth determines whether an intervention's effect can be detected at all — interpretation of the signal depends entirely on the fidelity of the instrument reading it.
Original published by Nature Aging, by Amit K. Dey.