Navigation Links
Cut Calories to Age Gracefully

A recent study has shown that cutting back a few calories from our diet and exercising some more over a lifespan can prevent certain age related changes in cells. //

Scientists from the University of Florida's Institute on Aging have found that eating a little less food and exercising a little more over a lifespan can reduce or even reverse aging-related cell and organ damage in rats.

The discovery, described this month in the journal Antioxidants and Redox Signaling, builds on recent research in animals and humans that has shown a more drastic 20 percent to 40 percent cut in calories slows aging damage. The UF findings indicate even small reductions in calories could have big effects on health and shed light on the molecular process responsible for the phenomenon, which until now has been poorly understood.

'This finding suggests that even slight moderation in intake of calories and a moderate exercise program is beneficial to a key organ such as the liver, which shows significant signs of dysfunction in the aging process,' said Christiaan Leeuwenburgh, Ph.D., an associate professor of aging and geriatric research at the UF College of Medicine and the paper's senior author.

UF scientists found that feeding rats just 8 percent fewer calories a day and moderately increasing the animals' activity extended their average lifespan and significantly overturned the negative effects of cellular aging on liver function and overall health.

An 8 percent reduction is the equivalent of a few hundred calories in an average human diet and moderate exercise is equivalent to taking a short walk.

To reveal the workings of the body's chemical climate when aging-related damage happens, UF researchers tracked levels of biomarkers - chemicals and molecules present in the liver - in groups of rats. The liver, a crucial organ for maintaining good health during aging, cleans the blood and helps regulate the body's immune system. The researchers also plan to assess the same biomarkers in a study of rats' hearts, muscle and brains.

The research team was surprised to find one of the biomarkers, RNA, which is important for coding DNA and for protein synthesis, is more quickly damaged by aging than the more frequently studied DNA. RNA damage, therefore, could be an excellent early signal to indicate the onset of aging, researchers say.

'Because it is more sensitive to oxidative stress, RNA can be useful as an early marker of oxidative damage and even aging,' said Arnold Y. Seo, a doctoral student in UF's Institute on Aging.

Seo authored the report along with Tim Hofer, Ph.D., an Institute on Aging research associate.

'To avoid disease, we can increase our defense and look for aging biomarkers and then test interventions,' Hofer said. 'It is better to protect what is there to improve the quality of life than to have to resort to invasive procedures.'

In the study, which followed the rats over their lifespan, one group of animals ate as much food as they wanted and did not exercise, another group of animals exercised lightly and were fed slightly less than they would have eaten if allowed to have their fill. Liver samples from these groups were compared with samples taken from young rats.

) The old sedentary rats that ate until they were full had increased levels of harmful oxidizing and inflammatory molecules in the liver that were associated with cell damage caused by aging. Meanwhile, aging rats that exercised and consumed a calorie-restricted diet, had the reverse outcome - they showed a decrease in these molecules in the liver.

) Leeuwenburgh said the study results support the theory that cell death and aging-related organ damage are caused by unstable molecules known as free radicals and by cellular oxidation and inflammation.

) "In a calorie-restricted environment, you reduce t he inflammatory response and prevent cell death," Leeuwenburgh said.

John O. Holloszy, a professor of medicine in the division of geriatrics and nutritional sciences at Washington University School of Medicine in St. Louis, said the study is of major importance because it shows a mild degree of caloric restriction - just enough to prevent weight gain with advancing age - can have beneficial effects against aging. From a scientific perspective, he added, it is important to learn that RNA is a very good marker of aging damage.

'I'd never really thought about RNA before,' Holloszy said. 'Research has always looked at DNA. Because RNA is the template for the information on the genes on the DNA, RNA damage is a major problem because it results in mutations in the transcription of proteins.'

Source: Eurekalert

Related medicine news :

1. A Reduction In Calories Found To Yield More Benefits
2. Counting Calories Might Be The Ideal Way To Stay Healthy
3. Burn Away Calories In Your Garden
4. Stay Young By Cutting Down Calories
5. Starter Salads Keep Calories At Bay
6. Lesser Calories for Longer Life
7. Cancer Prevented by Diet Low in Protein and Calories
8. Trans Fat Ban: Watch Saturated Fats and Calories Too
9. Food Hampers Deficient in Calories, Study Says
10. Taking Low-calorie Soup Before Meal Will Help Cut Calories at Meals
11. Aging in Place Concept Helps People Age Gracefully
Post Your Comments:

(Date:11/30/2015)... Los Angeles, CA (PRWEB) , ... November 30, 2015 , ... ... music star Jessie James Decker made a brave but slightly unusual choice to show ... quickly returning to her pre-pregnancy form may have been pre-mature. Saying that she didn’t ...
(Date:11/30/2015)... ... November 30, 2015 , ... A record crowd gathered at the Pennsylvania Biotech ... the Baruch S. Blumberg Institute. , The institute, which is the research arm of ... biotechnology leaders for the conference, which focused on ways companies can work to reduce ...
(Date:11/30/2015)... Scotch Plains, NJ (PRWEB) , ... November 30, 2015 , ... ... patients in a comfortable and convenient setting. , When you have dental problems, you ... knows the field and can effectively diagnose and treat your needs, a friendly dentist ...
(Date:11/30/2015)... Scotch Plains, NJ (PRWEB) , ... November 30, 2015 , ... ... third generation dentist. His grandfather graduated from Tufts School of Dental Medicine in ... celebrates 80 years for the Isola family being in dentistry as well as their ...
(Date:11/30/2015)... ... November 30, 2015 , ... The Foundation ... cancer education and prevention—is joining forces with the award-winning creator and writer of ... on December 7, 2015 at the Union League of Philadelphia. , The ...
Breaking Medicine News(10 mins):
(Date:11/30/2015)... 2015 Cumberland Pharmaceuticals (CPIX), today announced that A.J. ... on December 3, 2015. TIME: 3:15p.m. ET LINK: ... LINK: --> DATE: Thursday, ... --> --> This ... invited to ask the company questions in real-time - both ...
(Date:11/30/2015)... 2015 Varian Medical Systems (NYSE: VAR ) has ... with Apollo Hospitals Group, the largest hospital chain in ... radiation technologists in the country. The MoU was signed by Dr. ... Ashok Kakkar , Varian,s India managing ... India , Varian intends to deploy its Access to Care ...
(Date:11/30/2015)... LONDON and BOSTON , ... to research and develop potential new medicines directed at ... multiple therapeutic areas. --> PFE ) to ... to 10 G protein-coupled receptor (GPCR) targets across multiple ... clinical-stage GPCR structure-guided drug discovery and development company and ...
Breaking Medicine Technology: