Centenarian Sirt6 Variants Elevate Sirt6 Protein And Enhance Cellular Senescence Resistance
Ever wondered what makes some people live to 100 and beyond? Scientists are looking into the unique genetic makeup of these “centenarians” to uncover secrets of healthy aging. A recent study has shed light on specific genetic variations found in these exceptionally long-lived individuals. These variations occur in a gene responsible for producing a protein called SIRT6.
SIRT6 is a crucial enzyme, a type of protein that speeds up chemical reactions in the body, and it plays a vital role in maintaining our cells. It helps repair damaged DNA, keeps our genetic material stable, and responds to cellular stress. The exciting discovery is that the centenarian-associated genetic variations cause cells to produce more SIRT6 protein.
This increased amount of SIRT6 protein helps cells become more resistant to “senescence,” a state where cells stop dividing and essentially become old and dysfunctional, contributing to the aging process. By boosting SIRT6, cells are better able to maintain their DNA repair systems and prevent the activation of harmful genetic elements, thereby delaying the onset of cellular aging.
Remarkably, the research also showed that a compound designed to mimic the effects of these centenarian variants could partially reverse some of the molecular defects associated with premature aging in cells from individuals with progeria, a rare genetic disorder that causes rapid aging. These findings offer promising insights into how genetic discoveries from long-lived individuals could pave the way for new therapies aimed at promoting healthier aging for everyone.
Source: link to paper