A study known as 'SWISS100' has identified 37 proteins in the blood of centenarians that appear to correlate with slower aging processes. This research compared the blood profiles of individuals aged 100-105 with those in their eighties and adults aged 30-60.
The findings indicate that the profiles of these 37 proteins in centenarians are notably similar to those of younger individuals, particularly concerning low oxidative stress markers. Other identified proteins are involved in extracellular matrix regulation, potential tumor protection, and lipid and glucose metabolism.
Study Methodology
The 'SWISS100' study, led by Daniela Jopp from the University of Lausanne (UNIL) and Karl-Heinz Krause from the University of Geneva (UNIGE), integrates sociological, psychological, medical, and biological research. The biological component examined molecular characteristics, comparing 39 centenarians (85% women), 59 octogenarians, and 40 younger volunteers (aged 30-60).
Including octogenarians allowed for a more detailed analysis of how blood markers evolve over a lifetime and helped differentiate normal aging from exceptional longevity.
Key Findings
Out of 724 proteins measured in blood serum (including 358 inflammatory and 366 cardiovascular markers), 37 showed distinct patterns.
In centenarians, these 37 protein profiles were closer to those of the youngest group than to the octogenarians, suggesting that while centenarians still age, certain key biological mechanisms are significantly slowed.
Oxidative Stress
Five proteins linked to oxidative stress displayed clear results. Centenarians exhibit significantly lower levels of antioxidant proteins, which indicates a reduced need to produce these proteins due to lower overall oxidative stress. Oxidative stress is caused by free radicals, primarily from chronic inflammation and dysfunctional mitochondria, and is suspected of accelerating aging.
Metabolic and Inflammatory Markers
Other significant findings include:
- Extracellular Matrix: Regulatory proteins of the extracellular matrix show 'youthful' expression levels in centenarians.
- Cancer Defense: Some proteins might play a role in defending against tumor development.
- Lipid Metabolism: Several proteins involved in fat metabolism show a much smaller increase with age in centenarians compared to the standard geriatric population.
- Inflammation: Interleukin-1 alpha, a major inflammatory protein, is also lower in centenarians.
- Glucose Balance: The DPP-4 protein, which degrades GLP-1 (a hormone stimulating insulin secretion), remains well-preserved in centenarians. This helps maintain relatively low insulin levels, potentially offering protection against hyperinsulinism and metabolic syndrome.
This suggests that longevity is linked to optimized, rather than intensified, metabolic health.
Lifestyle Implications
These findings could contribute to new therapeutic strategies for frailty in the elderly. The study emphasizes the importance of a healthy lifestyle, as the genetic component of longevity accounts for only about 25%.
Lifestyle factors such as nutrition, physical activity, and social connections are highlighted as powerful levers for promoting healthy aging. Examples include fruit consumption reducing oxidative stress, physical activity maintaining a 'youthful' extracellular matrix, and avoiding excess weight preserving healthy metabolism.