Age-related changes in microRNA levels in serum
Nicole Noren Hooten1, Megan Fitzpatrick, William H Wood
1Laboratory of Epidemiology and Population Sciences, National Institutes of Health, Baltimore, MD 21224, USA.
Aging
|October 4, 2013
Summary
Circulating microRNAs (miRNAs) decrease with age, potentially serving as biomarkers for aging and longevity. Specific miRNAs like miR-151a-5p, miR-181a-5p, and miR-1248 show reduced levels in older individuals.
Area of Science:
- Molecular Biology
- Gerontology
- Biochemistry
Background:
- MicroRNAs (miRNAs) are small noncoding RNAs regulating gene expression.
- Altered circulating miRNA levels are linked to age-related diseases.
- The role of circulating miRNAs in human aging remains largely unknown.
Purpose of the Study:
- To investigate miRNA expression in the serum of young versus old individuals.
- To identify potential circulating miRNA biomarkers of human aging.
Main Methods:
- Serum samples from young (mean age 30) and old (mean age 64) individuals were analyzed.
- Next-generation sequencing and real-time quantitative PCR were employed.
- miRNA expression was compared between the age groups.
Main Results:
- Three miRNAs (miR-151a-5p, miR-181a-5p, miR-1248) were significantly decreased in older individuals.
- These miRNA changes were consistent with findings in elderly rhesus monkeys.
- miR-1248 and miR-181a were associated with inflammatory pathways and cytokine levels.
Conclusions:
- Circulating miRNAs may serve as biological markers for aging.
- These miRNAs could play a role in regulating longevity.
- Stable serum miRNA biomarkers offer potential for noninvasive diagnostics and understanding aging processes.
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