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J Gerontol A Biol Sci Med Sci. 2016 Feb;71(2):196-202. doi: 10.1093/gerona/glv007. Epub 2015 Mar 5.

A Novel Analytic Technique to Measure Associations Between Circulating Biomarkers and Physical Performance Across the Adult Life Span.

Author information

1
Matthew.peterson@wright.edu.
2
Department of Medicine, Duke University, Durham, North Carolina.
3
Center for the Study of Aging and Human Development/Claude D. Pepper Older Adults Independence Center and Department of Biometry and Bioinformatics, Duke University Medical Center, Durham, North Carolina.
4
Center for the Study of Aging and Human Development/Claude D. Pepper Older Adults Independence Center and Department of Medicine, Duke University, Durham, North Carolina.
5
Department of Medicine, Duke University, Durham, North Carolina. Geriatric Research, Education and Clinical Center, Veteran's Affairs Medical Center, Durham, North Carolina.
6
Center for the Study of Aging and Human Development/Claude D. Pepper Older Adults Independence Center and.

Abstract

Understanding associations between circulating biomarkers and physical performance across the adult life span could aid in better describing mechanistic pathways leading to disability. We hypothesized that high concentrations of circulating biomarkers would be associated with lower functioning across study populations representing the adult life span. The data were from four intervention and two observational studies with ages ranging 22-89 years. Biomarkers assayed included inflammatory, coagulation, and endothelial function markers. Physical performance was measured either by VO2peak (studies of young and middle-aged adults) or usual gait speed (studies of older adults). Partialled (by age, body mass index, race, and sex) and weighted common correlations were calculated between biomarkers and physical performance. Homogeneity of the associations was also assessed. Interleukin-6 (weighted r = -.22), tumor necrosis factor receptor 2 (weighted r = -.19), D-dimer (weighted r = -.16), tumor necrosis factor receptor 1 (weighted r = -.15), granulocyte colony-stimulating factor (weighted r = -.14), and tumor necrosis factor alpha (weighted r = -.10) were all significantly inversely correlated with physical performance (p < .05). All significant correlations were homogeneous across studies. In summary, we observed consistent inverse associations between six circulating biomarkers and objective measures of physical performance. These results suggest that these serum biomarkers may be broadly applicable for detection, trajectory, and treatment monitoring of physical function across the life span or possibly for midlife predictors of functionally deleterious conditions.

KEYWORDS:

Aging life span; Circulating biomarkers; Physical performance

PMID:
25745025
PMCID:
PMC4723660
DOI:
10.1093/gerona/glv007
[Indexed for MEDLINE]
Free PMC Article

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