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Santanasto AJ, Wojczynski MK, Cvejkus RK, et al. Identification of a Novel Locus for Gait Speed Decline With Aging: The Long Life Family Study. J Gerontol A Biol Sci Med Sci. 2021;76(10):e307-e313doi: 10.1093/gerona/glab177.
Santanasto, A. J., Wojczynski, M. K., Cvejkus, R. K., Lin, S., Wang, L., Thyagarajan, B., Christensen, K., Schupf, N., Feitosa, M. F., An, P., & Zmuda, J. M. (2021). Identification of a Novel Locus for Gait Speed Decline With Aging: The Long Life Family Study. The journals of gerontology. Series A, Biological sciences and medical sciences, 76(10), e307-e313. https://doi.org/10.1093/gerona/glab177
Santanasto, Adam J, et al. "Identification of a Novel Locus for Gait Speed Decline With Aging: The Long Life Family Study." The journals of gerontology. Series A, Biological sciences and medical sciences vol. 76,10 (2021): e307-e313. doi: https://doi.org/10.1093/gerona/glab177
Santanasto AJ, Wojczynski MK, Cvejkus RK, Lin S, Wang L, Thyagarajan B, Christensen K, Schupf N, Feitosa MF, An P, Zmuda JM. Identification of a Novel Locus for Gait Speed Decline With Aging: The Long Life Family Study. J Gerontol A Biol Sci Med Sci. 2021 Sep 13;76(10):e307-e313. doi: 10.1093/gerona/glab177. PMID: 34156441; PMCID: PMC8436996.
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J Gerontol A Biol Sci Med Sci. 2021 Sep 13;76(10):e307-e313. doi: 10.1093/gerona/glab177.

Identification of a Novel Locus for Gait Speed Decline With Aging: The Long Life Family Study.

The journals of gerontology. Series A, Biological sciences and medical sciences

Adam J Santanasto, Mary K Wojczynski, Ryan K Cvejkus, Shiow Lin, Lihua Wang, Bharat Thyagarajan, Kaare Christensen, Nicole Schupf, Mary F Feitosa, Ping An, Joseph M Zmuda

Affiliations

  1. Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pennsylvania, USA.
  2. Department of Genetics, Division of Statistical Genomics, Washington University School of Medicine, St. Louis, Missouri, USA.
  3. Department of Laboratory Medicine and Pathology, School of Medicine, University of Minnesota, Minneapolis, USA.
  4. The Danish Aging Research Center, Epidemiology Unit, Institute of Public Health, University of Southern Denmark, Odense, Denmark.
  5. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, USA.

PMID: 34156441 PMCID: PMC8436996 DOI: 10.1093/gerona/glab177

Abstract

BACKGROUND: Gait speed is a powerful indicator of health with aging. Potential genetic contributions to gait speed and its decline with aging are not well defined. We determined the heritability of and potential genetic regions underlying change in gait speed using longitudinal data from 2379 individuals belonging to 509 families in the Long Life Family Study (mean age 64 ± 12, range 30-110 years; 45% men).

METHODS: Gait speed was measured over 4 m at baseline and follow-up (7 ± 1 years). Quantitative trait linkage analyses were completed using pedigree-based maximum likelihood methods with logarithm of the odds (LOD) scores greater than 3.0, indicating genome-wide significance. We also performed linkage analysis in the top 10% of families contributing to LOD scores to allow for heterogeneity among families (HLOD). Data were adjusted for age, sex, height, and field center.

RESULTS: At baseline, 26.9% of individuals had "slow" gait speed less than 1.0 m/s (mean: 1.1 ± 0.2 m/s) and gait speed declined at a rate of -0.02 ± 0.03 m/s per year (p < .0001). Baseline and change in gait speed were significantly heritable (h2 = 0.24-0.32, p < .05). We did not find significant evidence for linkage for baseline gait speed; however, we identified a significant locus for change in gait speed on chromosome 16p (LOD = 4.2). A subset of 21 families contributed to this linkage peak (HLOD = 6.83). Association analyses on chromosome 16 showed that the strongest variant resides within the ADCY9 gene.

CONCLUSION: Further analysis of the chromosome 16 region, and ADCY9 gene, may yield new insight on the biology of mobility decline with aging.

© The Author(s) 2021. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail: [email protected].

Keywords: Epidemiology; Gait; Genetics; Physical function

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