🧬 Rare genetic secrets reveal keys to healthier aging and a longer life
In recent decades, human life expectancy has risen noticeably, but the years people live in good health without chronic diseases have not increased by the same amount. This raises a vital question: why do diseases appear later in some people, allowing their healthy lives to last longer?
The latest research suggests that long-lived families may carry within their genes secrets that help them maintain health for exceptionally long periods, reflecting an important concept known as Healthspan, which is the number of years a person lives free from chronic diseases and cognitive decline.
🧠 Why do humans age differently?
Humans show clear diversity in the ways they age. While some face early chronic diseases that affect their quality of life, others are able to live for long periods while aging in good health.
The genetic factor plays an important role, but it is not the only factor, as social factors such as lifestyle, daily habits, and the environment in which a person lives are all linked to their aging pattern and overall health.
📌 The importance of studying long-lived families
Analyzing the genomes of members of entire families rather than focusing only on people who lived a long time provides a broader picture of the biological mechanisms that make it possible to extend the healthy years of life.
A study from Leiden University Medical Center explained that people belonging to families with advanced age live many more disease-free years, as cardiovascular diseases associated with metabolic diseases were delayed in them by an average of 13 years compared with their peers.
🧪 A possible genetic discovery behind healthy longevity
Scientists analyzed the genomes of 212 sibling groups from families characterized by longevity within the Leiden Longevity Study. This approach narrowed the search from more than 20,000 genes to 350 candidate genes.
A deeper analysis also revealed the presence of 12 rare genetic variants that alter protein structure and may play a role in preserving health and longevity.
🌱 The promising role of the CGAS gene
The CGAS (cyclic GMP-AMP synthase) gene emerged as one of the variants associated with longevity, as a modified genetic version of this gene was found in two long-lived families.
The CGAS gene plays a role in triggering the inflammatory response when DNA is detected in unexpected places inside cells, such as during viral infections or cell damage.
The researchers’ explanation is that some members of these families may carry one active copy of CGAS instead of two, which reduces excessive inflammation without compromising the body’s ability to resist infection or repair damage.
🩺 The effect of reducing inflammation on aging
Scientists believe that reducing the chronic inflammation that occurs with aging may be the key to preserving organ health and preventing damage caused by ongoing inflammation.
On the other hand, caution is needed, as completely disabling the CGAS gene could harm the body’s ability to fight infection and cancer, while overactivating it causes chronic inflammation and tissue damage.
⚗️ From the laboratory to the living body
To evaluate the effectiveness of this variant under real-life conditions, the researchers plan to introduce a modified genetic version of CGAS into an animal model widely used in aging research, namely the Killifish.
This fish has a short lifespan ranging from 3 to 9 months, which allows the effects of genetic mutations on healthy lifespan to be studied effectively and quickly compared with mammals.
🧬 New insights for developing healthy longevity
These findings help advance our understanding of the biological mechanisms that enable some families to maintain exceptional health for decades, opening the door to future strategies focused on enhancing overall health, not just extending life.
Experts point out that focusing on long-lived families, especially when searching for rare genetic mutations, will make it possible to distinguish what truly comes from genes from the effects of environment or behavior.
Continuing this research path through collaboration between multiple scientific groups will help confirm the validity and applicability of these discoveries on a broader scale.
📌 Key points from the research:
- The concept of healthspan refers to years lived in good health and free from chronic diseases.
- Individuals from long-lived families experience delayed onset of heart and metabolic diseases by an average of 13 years.
- Identification of 12 rare genetic variants associated with longevity, including the CGAS gene.
- Moderate activation of the CGAS gene reduces chronic inflammation and enhances the body’s ability to heal.
- Future experiments on Killifish will make it possible to study the effect of the mutation on actual life.
This study reveals a potential gateway to a better understanding of how to delay chronic diseases and improve quality of life at advanced stages, at a time when societies around the world need sustainable solutions to the growing burden of aging-related diseases.
📚 Related articles
Discover more from Mohdbali
Subscribe to get the latest posts sent to your email.
