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Neurofilament light chain may serve as a cross-species blood biomarker to assess aging and predict mortality
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Neurofilament light chain may serve as a cross-species blood biomarker to assess aging and predict mortality
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Journal Article
Neurofilament light chain may serve as a cross-species blood biomarker to assess aging and predict mortality
2026
Overview
Blood levels of neurofilament light chain (NfL) increase with age in healthy humans and have been shown to predict all-cause human mortality. To determine whether this relationship is conserved across species, we analyzed NfL in the blood of various animals. We observed age-related increases in NfL levels comparable to those seen in humans in mice, cats, dogs and horses. Longitudinal analysis of NfL trajectories in aged mice demonstrated that a faster rate of NfL increase predicts mortality. When comparing baseline NfL levels across 13 species, we found that those with lower baseline NfL levels tended to have longer lifespans; however, the collinearity between body size and life span complicates the interpretation of this finding. NfL was also robustly detected in blood of 39 additional mammalian species, as well as a few reptiles and birds, consistent with a conserved amino acid sequence of the NfL fragment in blood. Given the growing interest in NfL as a biomarker for neurological health and mortality in humans, our findings suggest that NfL may serve as a cross-species blood biomarker for assessing aging interventions and predicting mortality.
Publisher
Public Library of Science,PLOS,Public Library of Science (PLoS)
Subject
