Navigation Links
And the beat goes on...: The reliable heartbeat of hibernators
Date:5/7/2013

To date, the mechanisms underlying the maintenance of cardiac function at low body temperatures are poorly understood. Now, scientists at the Research Institute of Wildlife Ecology at the University of Veterinary Medicine, Vienna, together with colleagues at the University of Groningen in the Netherlands, have found that certain omega-3 and omega-6 fatty acids regulate the cardiac function and hence hibernation. These fatty acids control the process of maintaining a regular heartbeat, achieving lower body temperatures during hibernation and thereby ensuring the hibernator's survival.

Fatty acids regulate hibernation

In the present study Sylvain Giroud and colleagues were able to demonstrate that a specific omega-6 fatty acid, Linoleic acid (LA), regulates cardiac function and ensures a regular heartbeat during hibernation. The scientists found that hibernators show higher levels of LA in their heart tissue compared to animals in a non-hibernating state. The scientists determined the cardiac fatty acid composition of hibernating and non-hibernating Syrian hamsters (Mesocricetus auratus). They found that hamsters had higher LA levels during the cooling phase and in deep hibernation than during the active period. Additionally, the researchers investigated a specific omega-3 fatty acid, Docosahexaenoic Acid (DHA), which was significantly lower in the examined animals during hibernation. The scientists concluded that both high levels of LA and low levels of DHA are essential for hibernation. According to the study, the amounts of these specific omega-6 and -3 fatty acids in the heart can be regulated up and down, depending on the season. In summer, unlike during hibernation, high levels of DHA protect the heart from overexertion.

Activity of calcium pump in the heart

Certain fatty acids can influence the activity of so-called calcium pumps. These pumps are responsible for proper muscle contractions in the bo
'/>"/>

Contact: Sylvain Giroud
Sylvain.Giroud@vetmeduni.ac.at
43-148-909-15135
University of Veterinary Medicine -- Vienna
Source:Eurekalert

Page: 1 2

Related biology news :

1. Study shows immunohistochemistry is reliable screening tool for ALK rearrangement
2. Computer simulations for multiscale systems can be faster, better, more reliable
3. Artificial jellyfish swims in a heartbeat
4. New analysis of premature infants heartbeats, breathing could be cues for leaving NICU
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/2/2015)... , April 2, 2015 ... tests DERMALOG by far outperforms the strongest competitors, ... maintaining high accuracy, the system is capable of ... the speed proves up to be ten times ... than its runner-up performance.      (Photo: ...
(Date:4/2/2015)... 2, 2015 Fingerprint Cards (FPC) ... FPC1025 from the distributor World Peace Industrial Group (WPI), ... 2015 although the major part of the shipments will ... used by smartphone manufacturers in China ... in the communicated revenue guidance of + 1 000 MSEK ...
(Date:3/31/2015)... 31, 2015  Elephant Talk Communications Corp. (NYSE MKT: ... of Software Defined Network Architecture (ET Software DNA® 2.0) ... of approximately $20.4 million for the year ended December ... for the year ended December 31, 2013. ... had completed its multi-year transition away from its legacy ...
Breaking Biology News(10 mins):DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 2DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 3Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 110 Million 2Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 2Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 3Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 4Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 5Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 6
... Sweden and the University of Glasgow, Scotland, has identified a ... gastrointestinal bacteria. In a study published as a letter to ... suggesting that the human genome may play a role in ... human gastrointestinal tract collectively known as the gut microbiota. ...
... a classic example of evolutionary adaptation, with beaks that vary ... While living birds have a beak to manipulate their food, ... discovery shows some fossil birds evolved teeth adapted for specialized ... a new species of early bird, Sulcavis geeorum , ...
... by senior author Morris J. Birnbaum, MD, PhD, the ... Institute for Diabetes, Obesity, and Metabolism, Perelman School of ... metformin works in a different way than previously understood. ... liver hormone glucagon,s ability to generate an important signaling ...
Cached Biology News:International study suggests human genes influence gut microbial composition 2First fossil bird with teeth specialized for tough diet 2Most-used diabetes drug works in different way than previously thought 2
(Date:4/24/2015)... Mirego, leader in mobile strategies and solutions, is proud to ... for the all new Apple Watch. Made in ... these extensions will reinvent the way users receive and interact ... Available today in Canada ... that makes for an excellent buddy for business, health and ...
(Date:4/24/2015)... (PRWEB) April 24, 2015 Seoul ... technology for various applications in the lighting market. ... successful installations of this technology in emerging markets ... for a wide range of applications such as ... and decorative lighting. , First launched in 2005 ...
(Date:4/23/2015)... Mount Dora, Florida (PRWEB) April 23, 2015 ... announced that it intends to conduct a groundbreaking ... can begin to be reversed in as little ... researchers—using the science of metabolic and nutritional medicine—will ... conditions that cripple and destroy our aging brain. ...
(Date:4/23/2015)... Six startups from Russia traveled ... as part of the U.S.-Russia Innovation Corridor (USRIC) ... biotechnology startups to participate in the program since ... the University of Maryland (UMD) signed a Memorandum ... universities in the biomedical industry in 2013. , ...
Breaking Biology Technology:Familiprix, OMSignal and MediaMiser apps available today for Apple Watch 2Acrich Technology from Seoul Semiconductor Adopted in Installations Worldwide 2New Study Looks to Reverse Alzheimer’s Disease 2New Study Looks to Reverse Alzheimer’s Disease 3U.S.-Russian Innovation Corridor Program Connects Visiting Russian Startups to U.S. Experts 2U.S.-Russian Innovation Corridor Program Connects Visiting Russian Startups to U.S. Experts 3U.S.-Russian Innovation Corridor Program Connects Visiting Russian Startups to U.S. Experts 4
... whose MBA and undergraduate degree were minted at the ... Clear Software's North American operations, the company said on ... ,Cape Clear, headquartered in Massachusetts, provides "enterprise service bus" ... State of Wisconsin Department of Administraiton. , ,Though its ...
... are interested in bio and life science investments in ... Meanwhile the University of Wisconsin-Madison is introducing two new ... 30, 2005 Listen to this episode ... with companies in Madison ...
... Genzyme Corp. said on Wednesday it has agreed ... Wisconsin-Madison biotech spinoff, for $600 million in cash. , ,Bone ... more than $2 billion and almost 7,000 employees worldwide, plan ... companies recently reported healthy quarterly profits and revenues. Bone Care ...
Cached Biology Technology:Massachusetts firm to buy UW spinoff Bone Care for $600 million 2Massachusetts firm to buy UW spinoff Bone Care for $600 million 3