Navigation Links
Fat molecule ceramide may factor in muscle loss in older adults

As men and women age, increasing quantities of fat tissue inevitably take up residence in skeletal muscle. A small study of older and younger men conducted at the Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University suggests that a build-up of a fat molecule known as ceramide might play a leading role in muscle deterioration in older adults. The results of the study were published online this month by the Journal of Applied Physiology, a publication of the American Physiological Society.

The study enrolled ten 10 men in their mid-seventies to nine men in their early twenties. None of the men carried excess weight or had chronic health problems and none had exercised in six months. Ceramide was measured in a muscle biopsy taken at baseline. The participants performed a single bout of exercise (three sets of ten repetitions of knee extensions and leg presses) followed by two muscle biopsies which the authors used to examine how the exercise impacted muscle growth response.

"There is a known relationship between elevated ceramide levels and unhealthy muscle in obese adults, but to the best of our knowledge, this had not been studied in healthy weight, older adults," said Donato Rivas, Ph.D., the study's first author and a scientist in the Nutrition, Exercise Physiology and Sarcopenia Laboratory at the USDA HNRCA at Tufts University. "Our analysis of the muscle biopsies showed an accumulation of two types of ceramide molecules containing saturated fatty acids that were 156% and 30% higher in the older men. Furthermore, having higher accumulation of one of these saturated fatty acid types was associated with having less leg muscle mass in both younger and older men."

"Although it is well known that fat tissue replaces some of our muscle tissue as we grow older, we are seeking to understand whether some fat molecules are more damaging to muscle than others," said Roger A. Fielding, Ph.D., senior author and director of the Nutrition, Exercise Physiology and Sarcopenia Laboratory. "We suspect that the increased storage of ceramide we saw in the older men, exacerbated by the presence of saturated fat, has a part in weakening the anabolic signaling that responds to resistance exercises and helps with the assembly of new muscle."

Learning more about ceramide activity through larger, long-term interventional trials involving older and younger men and women may identify a role in dietary or therapeutic drug interventions for sarcopenia, an age-related condition of muscle loss and function.

"The deterioration of muscle is compounded by a loss of muscle strength, which really begins to decline around age 50 and appears to be a factor in the visible decrease in mobility people exhibit around age 80," added Fielding, who is also a professor at the Friedman School of Nutrition Science and Policy at Tufts University and at Tufts University School of Medicine. "Previous research done at Tufts and other institutions suggests that even with limited exercise older adults can maintain and build some new muscle. Until there is enough research to develop specific exercise and dietary interventions, staying as physically active as deemed safe by your health care provider can only benefit aging muscle."


Contact: Andrea Grossman
Tufts University, Health Sciences Campus

Related medicine news :

1. New developments reveal a molecule with a promising function in terms of cancer treatment.
2. Measuring molecules with the naked eye
3. Molecule shows effectiveness against drug-resistant myeloma
4. Molecule found that inhibits recovery from stroke
5. Cleveland Clinic researchers discover molecule that may prevent atherosclerosis
6. Mayo Clinic: Molecule thought cancer foe actually helps thyroid tumors grow
7. Inhibitors of shuttle molecule show promise in acute leukemia
8. Researchers identify a life-and-death molecule on chronic leukemia cells
9. Prions in the brain eliminated by homing molecules
10. Molecule movements that make us think
11. Smoking and hyperactivity share common genetic risk factor
Post Your Comments:
(Date:11/30/2015)... , ... November 30, 2015 , ... Cycling, running, and ... take on extra meaning the morning of February 28, 2016. , That’s when ... Park and thousands will exercise to help children and families at Joe DiMaggio ...
(Date:11/30/2015)... ... November 30, 2015 , ... A ... of bacteria could be effective in fighting methicillin-resistant Staphylococcus aureus (MRSA), one of ... Their study showed that small molecule analogs that target the functions of SecA, ...
(Date:11/30/2015)... ... November 30, 2015 , ... Using a combination of two blood ... children and adults, according to a new study by researchers at the School of ... Children and Adults: Using Combinations of Blood Glucose Tests ,” published in Frontiers in ...
(Date:11/30/2015)... ... November 30, 2015 , ... International telepathology consultations can ... and KingMed Diagnostics researchers. Their review of more than 1,500 pathology ... pathologists resulted in significantly altered treatment plans for more than half of the ...
(Date:11/30/2015)... PHILADELPHIA (PRWEB) , ... November 30, 2015 , ... ... Philadelphia-based non-profit promoting breast and prostate cancer education and prevention—is joining forces with ... evening of philanthropy and Hollywood elegance on December 7, 2015 at the Union ...
Breaking Medicine News(10 mins):
(Date:11/30/2015)... BOCA RATON, Fla. , Nov. 30, ... of Public Research (the Institute) announced today that ... , a medical device start-up company with technology developed ... creation based on publicly-funded research, and bridges early funding ... -based universities and research institutions. ...
(Date:11/30/2015)... Nov. 30, 2015 Baxalta Incorporated ... leader dedicated to delivering transformative therapies to ... conditions, today announced the launch and first ... an extended circulating half-life recombinant factor VIII ... full-length ADVATE [Antihemophilic Factor (Recombinant)]. The treatment ...
(Date:11/30/2015)... Months Ended 30 September 2015 2014RestatedChange%Turnover 545,575 , 518,852 , ... 384,242 , 9.8 Hospital Management Service Income ... (18.3) Medical Insurance Administration Service Income , 2,780 ... and Accessories Sales , 89,645 , 94,580 ... 2,822 , 2,917 , (3.3) Gross ...
Breaking Medicine Technology: