articles and blogs Kerala Click Articles & Blogs


Blogs | Article Index | Breaking News | Movie News | Kerala Tour Packages | Kerala Pincode | About | Contact |


Death, Aging, Rejuvenation (Part 1)


I would like to raise a question: Is Rejuvenation possible and how to approach it? This is just my own opinion about possible procedures. I used certain techniques based on a theory. As strange as it sounds some of those techniques and procedures might actually worked.

There are several hundreds theories of aging. New and old ones. Different authors classify them differently.

I would divide all those theories into 2 groups :

1. Theories of Deterioration from external cause. "Wear and tear". Theory of free radicals damage is most fashionable at present time. Antioxidants are considered a cure. Benefits of caloric restriction are often explained by that theory. The theory has good objective support in scientific literature. Other theories of this group included changes of bacteria in the gut, radiation and accumulation of mutations during life of an individual, etc. - many more of those theories were discussed in the XX century. 2. Internal clock - theories.

I would divide the "internal clock" theories into 2 more subgroups: 1. Internal clock on the level of cell. Telomeres shortening is the most discussed in literature at present. 2. Internal clock on the level of organism. Growth hormone changes was a recent example of discussion.

Authors are usually very cautious and objective in scientific literature. Telomeres are usually discussed in connection with "immortal" cancer cells. Caloric restriction is discussed as a mean of longevity (not rejuvenation per se). Level of growth hormone (GH) or insulin-like growth factor drops in aged persons.

Mass media speculates wider: telomeres restoration - possible immortal life, growth hormone will rejuvenate you, etc.

Original scientific studies usually do not speculate about this. In no way for example drop of GH level in elderly means that just giving it back will make you young again.

Scientific literature rarely discuss "Rejuvenation" as it is. Authors mostly talk about "longevity". This is very different story. Longevity in a wheelchair is very distinct from a youth playing soccer. One proven method to reach longevity is caloric restriction. Often they say it is the only proven technique. Using antioxidants as a method to prolong life is in the same category. To put simple, the Theory says: nutrition produce products of oxidation - peroxides, etc. These products damage DNA, proteins, etc. Cell ages. Caloric restriction switches metabolic pathways. There are less free radicals. Hence longevity. Antioxidants work in similar way - they remove free radicals. Another speculation is that caloric restriction starting at young age delays reproductive age in animals and this slows down biological clocks and prolongs life until an environment with high nutrition supply is found. Animals look small and undeveloped.

Caloric restriction significantly (25%-100% and more) prolonged life in worms, flies, spiders, rats, mice, etc. Experiments on monkeys and humans are under way and will take decades.

Well, it is all good in experiments and theories. Some argue: why in this case prisoners of concentration camps do not live longer. Another example came from "Scientific American" - a person had caloric restriction of something 20 years or more - no effect - he just looks like very thin undernourished person of 50 years. Examples of opposite opinion also exist (tribes or groups with low food consumption or high antioxidants consumption have more centenarians than general population). Maybe you really need to start at 10 years of age, look malnourished and weak for the whole life and live to 100 years, getting to your puberty at 25. Antioxidants also bring many controversy. Vitamin E did not show many benefits though it was a big hope for prevention of many diseases of old age. And so on. Today there are big trials that disprove the theory. Tomorrow - great experiments that confirm the theory, at least partially. Many big trials and experiments are published in leading journals - Science, Nature, PNAS, New England JM, JAMA, etc.

One bias for caloric restriction experiment in my opinion is following. Rats live in cage 30cmX60cm for their whole life. There are at least five rats or 20 mice. They live couple years and die. During the experiments they are celebrities when they live 5 years - some lucky ones. The Food is a balanced mixture of nutrition. Caloric restriction is - 60% of their regular meal. They practically don't move - there is no space in cage. Mostly they sleep whole day. Sometime they fight and mate. They live in those conditions at Yale, at Med U of South Carolina, at Russian State Medical University and I think everywhere else. To compare our fellow humans we would place 10 people on area of 20 square metres (200 sq. feet) for 50 years in a row, feeding them with what they want but all the same - let say junk food from McDonalds.

I remember my cat (who was partially wild) stole meat and ate until it started to vomit. He repeated it many times when he was able to steal some steak or whatever. The same happens in wild - lions have maybe one successful hunt out of ten. When they catch a prey, they eat like crazy. Much more than they can digest at the moment. So it looks like there is an instinct. Eat as much as possible. This is not a joke - 60% of people in western countries are overweight. Abundant high calorie food and lack of activity. It does not seem that for these people any internal mechanism restricts food consumption. Applying this back to rats, we can see that what is considered normal consumption - "ad lib" - maybe actually big overfeeding of the animals in these cages.

In this case 60% of caloric restriction would be just what rats need, just what the calories they spend in lazy, uneventful daily life. So called "control", "normal" rats - that fed as they usually fed might be compared for fat overweight humans. They consume junk food. They prone to the bunch of diseases of obesity and low activity. Heart diseases, strokes, variety of cancers, arthritis, etc.

In this case all the hype about caloric restriction would just be brought to the business of mere balancing diet and activity in so called "calorie-restricted animals". I haven't seen any discussion of this problem. I might be wrong. This is why I use caloric restriction for myself. I did not work with worms and spiders. But my guess would be that they all are also in artificial standardized conditions. "Control" worms might be also overfed. To put rats into bigger cages (to increase activity in control group and balance calories and catabolism) would be incredibly expensive.

Even at present conditions because of "animal lovers" and bunch of other regulations and considerations (e.g. sterile conditions), the price of animal housing is sky-high.

You would say animals in wild would live longer because they balance activity and consumption. Well, recently I read that life span of animals in wild is shorter than animals in captivity. Correct me if I am wrong: pandas live 15-20 years in nature and 20-30 in zoos, bears 20-25 in nature and 30-40 in captivity. Civilization has certain benefits - vaccinations, good medical care, more or less good hygiene. So just moving into wild conditions wouldn't make you younger or allow to live longer.

Now, to discuss rejuvenation procedures, I would need to talk about aging first. In this case Rejuvenation could be considered as reversal of aging (deterioration). Longevity is different story - it is prolonged life span. Rejuvenation supposedly should lead to longevity. But longevity is not equal to Rejuvenation. Aging leads to Death eventually. It is easier to discuss from that end.

All written here is just plain speculation, take it with a grain of salt.

- continued in Part 2

About The Author

Aleksandr Kavokin, MD,PhD

http://www.geocities.com/aging_rejuvenation/

http://www.geocities.com/usmle_test

aging_rejuvenation@yahoo.com


MORE RESOURCES:

Voice of San Diego

Vacation Rentals Worsen the Housing Crisis
Voice of San Diego
Lack of regulation and enforcement on San Diego's existing short-term vacation rentals, which were deemed illegal by San Diego City Attorney Mara Elliot in March, has had a disastrous impact on the housing stock of our communities already. In stark ...



Washington Post

D.C. Council's Airbnb bill could hurt small businesses that depend ...
Washington Post
The Sept. 18 article “Money and liability are among issues driving the D.C. Airbnb bill” overlooks the most important issue: its potential to devastate small ...

and more »


Benzinga

How Hotel Suites Can Compete With Airbnb And Vacation Rentals ...
Benzinga
Robbie Bhathal, father and husband, loves to travel. However, in recent years, he'd been having trouble finding hotel rooms that could accommodate his whole ...

and more »


Redding Record Searchlight

Shasta County works to make vacation rentals legal
Redding Record Searchlight
For years the vacation rental market in Shasta County has been growing, and Shasta County officials are now trying to catch up to it to make it actually legal. From May 2016 to September 2017, the number of vacation rentals in the county rose 27 percent.



Skift

Business of Loyalty: Hyatt Intends to Expand Program to Vacation Rentals
Skift
Business of Loyalty: Hyatt Intends to Expand Program to Vacation Rentals. Grant Martin, Skift. - Oct 10, 2017 12:30 am. Skift Take. It may soon be possible through Hyatt to earn hotel-loyalty program elite status by staying in a vacation rental ...



The Denver Post

Cybersecurity, vacation rentals and more nab "Denver Gazelle" top ...
The Denver Post
Former Broncos offensive tackle Ryan Harris, left, and Denver Mayor Michael Hancock take a selfie on stage at the kick off for Denver Startup Week at the ...

and more »


Sun Sentinel

Hollywood toughens rules for vacation rentals
Sun Sentinel
Hollywood cracked down on vacation rentals in fall 2015 by requiring them to apply for licenses. Those that don't comply face fines of $250 for the first offense and $500 for subsequent offenses. Vacation rentals with three offenses in the same year ...



The San Diego Union-Tribune

Short-term vacation rentals lower property values
The San Diego Union-Tribune
Living near a vacation rental negatively affects the desirability and value of our homes. Who wants to buy a home and raise their children near a motel-like house? Selling your home, you are required to fill out for potential buyers, a questionnaire ...



Skift

Booking.com Could Narrow the Gap In Vacation Rentals
Skift
In our metasearch report, we discussed the opportunity for meta to play a bigger role in vacation rentals. Platforms like Tripping.com have built the use case in the segment. The static inventory (i.e. those that list their properties on one site only ...



Voice of San Diego

Time to Enforce the Law and Ban Short-Term Vacation Rentals ...
Voice of San Diego
The proliferation of short-term vacation rentals across San Diego has consumed housing stock and destroyed entire neighborhoods. Photo by Dustin Michelson.
Short-term rentals, affordable housing plans at odds - The San ...The San Diego Union-Tribune

all 2 news articles »

Google News

home | site map
© 2005