Navigation Links
Stay cool and live longer?
Date:2/14/2013

ANN ARBORScientists have known for nearly a century that cold-blooded animals, such as worms, flies and fish all live longer in cold environments, but have not known exactly why.

Researchers at the University of Michigan Life Sciences Institute have identified a genetic program that promotes longevity of roundworms in cold environmentsand this genetic program also exists in warm-blooded animals, including humans.

"This raises the intriguing possibility that exposure to cold airor pharmacological stimulation of the cold-sensitive genetic programmay promote longevity in mammals," said Shawn Xu, LSI faculty member and the Bernard W. Agranoff Collegiate Professor in the Life Sciences at the U-M Medical School.

The research was published online Feb. 14 in the journal Cell.

Scientists had long assumed that animals live longer in cold environments because of a passive thermodynamic process, reasoning that low temperatures reduce the rate of chemical reactions and thereby slow the rate of aging.

"But now, at least in roundworms, the extended lifespan observed at low temperature cannot be simply explained by a reduced rate of chemical reactions," Xu said. "It's, in fact, an active process that is regulated by genes."

Xu found that cold air activates a receptor known as the TRPA1 channel, found in nerve and fat cells in nematodes, and TRPA1 then passes calcium into cells. The resulting chain of signaling ultimately reaches DAF-16/FOXO, a gene associated with longevity. Mutant worms that lacked TRPA1 had shorter life spans at lower temperatures.

Because the mechanisms identified by Xu and his collaborators also exist in a range of other organisms, including humans, the research suggests that a similar effect might be possible. The study also links calcium signaling to longevity for the first time and makes a novel connection between fat tissue and temperature response.

Researchers have known that lowering the core body temperature of warm-blooded animals, such as mice, by 0.9 degrees Fahrenheit can extend lifespan by 20 percent, but it hasn't been practical for humans to attempt to lower the core body temperature, Xu said.

"But if some aspects of the aging process are initiated in skin and fat cells in humans as they are in nematodes, should we go out to embrace some cold air in the winter?" Xu said.

Xu added that in addition to cool temperatures, the spicy condiment wasabi activates TRPA1 as well, and that feeding wasabi to nematodes increases their life spans. "Maybe we should be going to sushi restaurants more often," he said.


'/>"/>

Contact: Laura J. Williams
laurajw@umich.edu
734-615-4862
University of Michigan
Source:Eurekalert

Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/28/2017)... Germany , February 28, 2017 News ... ... Amsterdam from 14 to 16 March, Materna ... destination, and show how seamless travel is a real benefit for ... has added biometrics to their passenger touch point solutions to take ...
(Date:2/22/2017)... 2017 With the biometrics market to ... four technologies that innovative and agile startups must ... in the changing competitive landscape: multifactor authentication (MFA), ... "Companies can no longer afford to ... Dimitrios Pavlakis , Industry Analyst at ABI ...
(Date:2/13/2017)... , Feb. 13, 2017  RSA Conference -- ... platform that is designed to enhance fraud detection ... release in the RSA Fraud & Risk Intelligence ... organizations to leverage additional insights from internal and ... to better protect their customers from targeted cybercrime ...
Breaking Biology News(10 mins):
(Date:3/24/2017)... and ROCKVILLE, Md. , March ... of Maxwell Biotech Venture Fund (MBVF), today announced positive ... added to the standard drug therapy regimen in patients ... small molecule drug discovered by scientists at Sequella, Inc. ... Institutes of Health. A total of ...
(Date:3/24/2017)... 2017 Agenus Inc. (NASDAQ: AGEN), an immuno-oncology ... cancer vaccines, today announced participation at the following conferences: ... Blair and Maidstone Life Sciences conference "Cancer Immunotherapy Conference" ... New York, NY . Agenus will participate ... 9:40 am: Robert B. Stein , M.D., Ph.D., ...
(Date:3/23/2017)... 23, 2017  SeraCare Life Sciences, Inc., a ... vitro diagnostics manufacturers and clinical laboratories, is ... multiplexed Inherited Cancer reference material ... next-generation sequencing (NGS). The Seraseqâ„¢ Inherited Cancer DNA ... from industry experts to validate the ability ...
(Date:3/23/2017)... YORK , March 23, 2017 ... ... of death, putting significant strain on health care systems, in ... cancer diagnoses rises, so too does the development of innovative ... minimum side effects. Among the many types of cancer treatments, ...
Breaking Biology Technology: