What this means
Aging is systemic, yet how circulating proteins reflect molecular aging within solid tissues remains unclear. We profiled 5,415 proteins using Olink Explore HT in 178 adults aged 20-87 years, including matched plasma-muscle (n = 56) and plasma-ovary (n = 24) pairs.
A plain-English summary is on its way. Until then, this is the start of the authors' own summary.
- Who it was tested in
- Not stated
- Kind of research
- Early results, not yet checked by other scientists
The science
- Original title
- Matched Plasma and Tissue Proteomics Reveal the Selective Nature of Circulating Biomarkers of Human Aging
- Authors
- Huang, Q., Watson, M. A., Earls, J. C. et al.
- Journal
- bioRxiv (preprint, not yet peer reviewed)
- Published
- Oct 24, 2026
- Study type
- Preprint
Abstract
Aging is systemic, yet how circulating proteins reflect molecular aging within solid tissues remains unclear. We profiled 5,415 proteins using Olink Explore HT in 178 adults aged 20-87 years, including matched plasma-muscle (n = 56) and plasma-ovary (n = 24) pairs. Plasma-tissue concordance was limited, with 50 muscle and 17 ovarian proteins significantly correlated, indicating that plasma selectively reflects tissue protein abundance. Age-correlated proteins and pathways differed markedly across sex and tissue strata, Including immune/inflammatory signatures in female plasma, vascular and extracellular-matrix pathways in male plasma, and collagen remodeling in the ovary. Expression Variation Analysis further revealed predominantly context-specific age-related changes in protein coordination, including FAS/FADD/TRAIL death-receptor networks in plasma and a TP53-CDKN1A senescence-associated axis in muscle. Exploratory multivariate models identified additional plasma associations with subsets of tissue proteins, including tissue-restricted muscle proteins. Together, these findings define plasma as a selective, context-dependent window into human tissue aging.
Huang, Q., Watson, M. A., Earls, J. C. et al. Matched Plasma and Tissue Proteomics Reveal the Selective Nature of Circulating Biomarkers of Human Aging. bioRxiv. 2026. doi:10.64898/2026.10.19.759783. https://doi.org/10.64898/2026.10.19.759783
Related research
Home exercise may change muscle in people with kidney disease
A small trial found changes in muscle blood vessels and fewer fibrosis-linked cells after 12 weeks of home exercise. Only 25 people took part, so this does not prove the exercise caused lasting muscle benefits.
Protein NEDD4 may protect disc cells from aging and cell death in a lab test
Researchers grew disc cells in a dish with an inflammation signal. Boosting NEDD4 eased aging and cell death, and it broke down another protein called PTEN. More tests in living animals and more checks are still needed.
Effects of Supplementation in Masters Athletes and Older Adults: A Narrative Review.
Supplementation use in athletes is common and increasing in popularity, especially for adults seeking improvements in athletic performance.
Review of copper peptide GHK-Cu studies finds many lab results but few human trials
Researchers read 64 studies on GHK-Cu, a copper-linked peptide, and found much lab and animal work. They say well-designed human trials using microneedles are still needed.
Review of a copper peptide used in skin treatments
Researchers reviewed 20 studies on GHK-Cu, a copper peptide, for skin and beauty uses. Most were lab or animal studies, and only two were human trials, so more strong testing is still needed.
Uterine function and reproduction aging. I. Molecular and structural alterations associated with impaired decidualization in aged mouse uteri.
Reproductive aging is associated with reduced fertility and increased risk of adverse pregnancy outcomes, including miscarriage, placental dysfunction, and fetal growth restriction.
See all research on Collagen peptides →