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Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence
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Does Salivary Telomere Length Explain Race/Ethnic Differences in Aging?

Lauren Brown1, Catherine García2, Jennifer Ailshire2

  • 1Population Studies Center, Institute for Social Research, University of Michigan, Ann Arbor, MI, USA.

Biodemography and Social Biology
|December 18, 2020
PubMed
Summary

Salivary telomere length (STL) does not explain racial or ethnic differences in health among older adults. STL was not associated with most health indicators in Black or Latinx individuals, and only a few in White individuals.

Keywords:
agingbiomarkersethnicityracetelomere length

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Area of Science:

  • Gerontology
  • Genetics
  • Public Health

Background:

  • Telomere length (TL) is a biomarker for aging and may explain race/ethnic health disparities.
  • Its role in health risks across diverse populations remains unclear.

Purpose of the Study:

  • To investigate if salivary TL (STL) explains race/ethnic variations in 15 health indicators.
  • To assess STL's association with health risks in White, Black, and Latinx older adults.

Main Methods:

  • Quantitative PCR (T/S ratio) used to assay STL from saliva.
  • Decomposition analyses from logistic regression models applied.
  • Study included 4,074 adults aged 54+ from the Health and Retirement Study.

Main Results:

  • STL variation did not account for observed race/ethnic differences in health.
  • STL was linked to HDL, total cholesterol, and lung function in Whites only.
  • No significant associations between STL and health markers were found in Black or Latinx participants.

Conclusions:

  • STL is not a useful biomarker for understanding race/ethnic differences in late-life health.
  • STL's association with health indicators is limited, particularly in minority groups.
  • Findings suggest STL does not explain health disparities in aging across racial/ethnic groups.