Boosting a Single Protein Reverses 80% of Age-Related Cell Changes in One Month
A research team at Bar-Ilan University, led by Haim Cohen, has published findings in Nature Communications demonstrating that elevating levels of the protein SIRT6 reverses approximately 80 percent of age-related chromatin accessibility changes in the liver cells of elderly male mice within just one month.
How the Study Worked
The study treated 24-month-old male mice with a hepatocyte-specific AAV8 viral vector to increase SIRT6 expression in their liver cells. After one month, 80 percent of the chromatin accessibility changes associated with aging were reversed, restoring a more youthful pattern.
Key Mechanism and Results
- Chromatin reversal: Aging alters chromatin accessibility, causing some regions to become more open and others more closed. The treatment restored a youthful pattern.
- Specific action: SIRT6 acted specifically on the histone modification H3K9ac, suggesting a clear mechanism for the reversal.
- Downstream effects: The intervention reduced inflammatory signaling and restored metabolic gene regulation toward a youthful pattern.
- Lifelong protection: In mice with lifelong SIRT6 overexpression, approximately 95 percent of age-related chromatin changes were protected from occurring.
"The finding demonstrates that specific age-related molecular changes are reversible in principle, providing a conceptual advance in aging research."
Important Limitations
- The study was conducted only in male mice; results may not apply to females.
- The reversal was limited to chromatin accessibility and related gene expression in liver cells, not aging itself.
- The intervention uses a viral vector not directly applicable to humans; further research is needed for translation.