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:2/3/2017)... , Feb. 3, 2017 A new ... Identity Strategy Partners, LLP (IdSP) . Designed to fill ... the complex identity market, founding partners Mark Crego ... 35 combined years just in identity expertise that span ... and non-profit leadership. The Crego-Kephart combined expertise has a ...
(Date:2/1/2017)... 2017 IDTechEx Research, a leading provider of ... the availability of a new report, Sensors for Robotics: Technologies, ... Reading ... ... Source: IDTechEx Report "Sensors for Robotics: Technologies, Markets and Forecasts 2017-2027: ...
(Date:1/26/2017)... -- Acuity Market Intelligence today released the 2017 "Ten ... characterizes 2017 as a "breakout" year for biometrics ... new understanding of the potential benefits these technologies ... are often perceived as threats to privacy and ... Acuity Market intelligence. "However, taken together these technologies ...
Breaking Biology News(10 mins):
(Date:2/24/2017)... NY (PRWEB) , ... February 24, 2017 , ... FireflySci, ... Founded in late 2014, FireflySci had the goal of bringing their powerful ... goal continues to shape the path that FireflySci is going on as they add ...
(Date:2/24/2017)... 2017  OncoSec Medical Incorporated ("OncoSec") (NASDAQ: ONCS), a ... Key Opinion Leader event to highlight new clinical data ... presentation at the upcoming 2017 ASCO-SITC Immuno-Oncology Symposium and ... be held in-person and via live webcast on Tuesday, ... PST at the Lotte New York Palace Hotel in ...
(Date:2/23/2017)... ... 2017 , ... BellBrook Labs is formalizing a significant expansion ... biochemical analyses critical for Lead Discovery. The company’s Lead Discovery Services will ... inhibitor potency and selectivity, mechanism of action, and inhibitor residence times on drug ...
(Date:2/23/2017)... -- In Atlanta, it seems everyone has a chance to express ... an expressive and dynamic community unlike any other. The businesses ... it. With their newest salon in ... carry on that tradition with a unique, fresh approach to ... is the newest of 13 nationwide locations, each of them ...
Breaking Biology Technology: