GDF-15: A New Indicator of Biological Aging and Its Impact on Physical Health
In the quest to understand aging beyond mere birthdays, scientists have identified Growth Differentiation Factor 15 (GDF-15) as a promising marker of biological age. Unlike chronological age, which counts the years lived, biological age reflects the body's physiological condition. Elevated levels of GDF-15 have been linked to accelerated biological aging, providing insights into an individual's health status.
The study delved into the relationship between GDF-15 levels and various biological age markers, such as DNA methylation patterns—chemical modifications that regulate gene activity without altering the DNA sequence. These patterns can indicate how environmental factors and lifestyle choices influence aging. Findings revealed that higher GDF-15 levels correspond with signs of advanced biological aging, suggesting that GDF-15 could serve as a reliable indicator of the body's aging process.
Beyond molecular markers, the research explored how GDF-15 levels relate to physical function, including muscle strength and mobility. Individuals with increased GDF-15 levels often exhibited diminished physical capabilities, underscoring the hormone's potential role in age-related physical decline. This connection highlights the importance of monitoring GDF-15 as part of strategies aimed at promoting healthy aging and enhancing quality of life in older adults.
Article Information
GDF-15 as a proxy for epigenetic aging: associations with biological age markers, and physical function
Published in Biogerontology. Torrens-Mas et al.
Abstract
Growth differentiation factor 15 (GDF-15) has emerged as a significant biomarker of aging, linked to various physiological and pathological processes. This study investigates circulating GDF-15 levels in a cohort of healthy individuals from the Balearic Islands, exploring its associations with biological age markers, including multiple DNA methylation (DNAm) clocks, physical performance, and other age-related biomarkers. Seventy-two participants were assessed for general health, body composition, and physical function, with GDF-15 levels quantified using ELISA. Our results indicate that GDF-15 levels significantly increase with age, particularly in individuals over 60. Strong positive correlations were observed between GDF-15 levels and DNAm GrimAge, DNAm PhenoAge, Hannum, and Zhang clocks, suggesting that GDF-15 could serve as a proxy for epigenetic aging. Additionally, GDF-15 levels were linked to markers of impaired glycemic control, systemic inflammation, and physical decline, including decreased lung function and grip strength, especially in men. These findings highlight the use of GDF-15 as a biomarker for aging and age-related functional decline. Given that GDF-15 is easier to measure than DNA methylation, it has the potential to be more readily implemented in clinical settings for broader health assessment and management.
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