Healthy Living Reverses Aging
I love reading articles that support what I have been saying for years – going on a health kick reverses aging at the cellular level. Now researchers say the same thing.
The University of California team says it has found the first evidence a strict regime of exercise, diet and meditation can have such an effect.
The study looked at just 35 men with prostate cancer. Those who changed their lifestyle had demonstrably younger cells in genetic terms.
The researchers saw visible cellular changes in the group of 10 men who switched to a vegetarian diet and stuck to a recommended timetable of exercise and stress-busting meditation and yoga.
This might be extreme for many people but slightly more vegetarian and slightly more exercise could be enough for many people.
The changes related to protective caps at the end of our chromosomes, called telomeres. The role of telomeres is to safeguard the end of the chromosome and to prevent the loss of genetic information during cell division.
Telomeres sit at the end of our chromosomes. They are like tips on the end of shoelaces that stop fraying, they protect the chromosomes that house important genetic information.
They are made up of a repetitive sequence of DNA. In cell division they shorten with cell and can signal when a cell should die.
If telomeres are not present for some reason, the ends of chromosomes tend to get chewed away or they may stick to other chromosomes. They allow the chromosomes to be replicated in their entirety, avoiding errors. As we age and our cells divide, our telomeres get shorter – their structural integrity weakens, which can tell cells to stop dividing and die.
Researchers have been questioning whether this process might be inevitable or something that could be halted or even reversed.
The latest work by Prof Dean Ornish and colleagues suggests telomeres can be lengthened, given the right encouragement.
They measured telomere length at the beginning of their study and again after five years.
Among the 10 men with low-risk prostate cancer who made comprehensive lifestyle changes, telomere length increased significantly by an average of 10%.
In comparison, telomere length decreased by an average of 3% in the remaining 25 men who were not asked to make any lifestyle changes.
It should be pointed out that shorter telomeres have been linked with a broad range of age-related diseases, including heart disease, and a variety of cancers.
The study did not set out to check if lifestyle changes and telomere lengthening would improve cancer outcomes, but the researchers say this is something that should be investigated.
Prof Ornish said: “The implications of this relatively small pilot study may go beyond men with prostate cancer. If validated by large-scale randomised controlled trials, these comprehensive lifestyle changes may significantly reduce the risk of a wide variety of diseases and premature mortality.
“Our genes, and our telomeres, are a predisposition, but they are not necessarily our fate.”
Experts agree that telomere shortening is unlikely to be the sole explanation for human ageing.
For example, humans have much shorter telomeres than primates and mice, yet live for far longer.
But past work has shown that people who lead a sedentary lifestyle can experience accelerated cellular ageing in the form of more rapid shortening of their telomeres.
via Blogger http://chiropractic-lane.blogspot.com/2013/09/healthy-living-reverses-aging.html
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