https://www.medicalnewstoday.com/articles/323039.php
In fact, a quick look at Greek mythology shows that youth was more prized than immortality, as some myths tell the story of how futile the latter is if it's not accompanied by the former.
In this regard, modern medicine has recently been catching up with ancient mythology.
Emerging scientific breakthroughs encourage us to hope that the myth of eternal youth will soon become a reality.
In a recent study, researchers were able to reverse signs of aging such as hair loss and wrinkles in mice; and, perhaps more impressively, another team of researchers managed to rejuvenate aging human cells.
Now, a new study adds to the evidence that aging can indeed be reversed. Scientists led by Dr. Ming-Hui Zou — the director of the Center for Molecular and Translational Medicine at Georgia State University in Atlanta — showed that fasting, or restricting calorie intake, can produce a molecule that delays vascular aging.
The findings were published in the journal Molecular Cell.
How a ketone molecule keeps cells young
Dr. Zou explains the motivation for this study, saying, "The most important part of aging is vascular aging. When people become older, the vessels that supply different organs are the most sensitive and more subject to aging damage, so studying vascular aging is very important."
So, the scientists set out to focus on vascular aging, on the changes that occur with senescence, and on ways to prevent them.
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They saw that, as expected, the starving mice produced the molecule beta-hydroxybutyrate. Surprisingly, however, this molecule also prevented vascular aging.
Beta-hydroxybutyrate is a ketone
— that is, a molecule produced by the liver and used as an energy
source when glucose is not available. The body produces ketones during
fasting or starvation, on low-carb diets, and after prolonged exercise.
Interestingly, the research also revealed that beta-hydroxybutyrate
promotes the division and multiplication of the cells that line the
inside of blood vessels. Cellular division is a marker of cellular
youth."We found [that beta-hydroxybutyrate] can delay vascular aging. That's actually providing a chemical link between calorie restriction and fasting and the anti-aging effect.""This compound can delay vascular aging through endothelial cells," Dr. Zou explains, "which line the interior surface of blood vessels and lymphatic vessels. It can prevent one type of cell aging called senescence, or cellular aging."
Dr. Ming-Hui Zou
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