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:7/30/2014)... Chemical Society (ACS) announced today that David L. Kaplan, ... Biomaterials Science & Engineering as editor-in-chief. With the ... new journal will feature high-quality research in the rapidly ... naturally derived materials that interact with living or biological ... reflects the tremendous growth in the field of biomaterials ...
(Date:7/30/2014)... distance between two points is a straight line, and ... taking the familiar axiom to heart. , Though ... intense, with each racing for the chance to fertilize ... form cooperative groups that allow them to take a ... study, conducted by Heidi Fisher, a post-doctoral student working ...
(Date:7/30/2014)... A group of researchers from the University of Helsinki ... experimentally to reproduce in mice morphological changes which have ... gradual modifications in the embryonic development of mice teeth, ... morphologically are very similar to those observed in the ... millions of years ago. , To modify the ...
Breaking Biology News(10 mins):ACS Biomaterials Science & Engineering: Brand-new journal launches in 2015, names editor 2When cooperation counts 2When cooperation counts 3Scientists reproduce evolutionary changes by manipulating embryonic development of mice 2
... Oregon State University has invented a way to use spent ... medical supplies, food and other products an advance that ... into a valued commodity. The technology, if widely implemented, ... United States to create a revenue stream of $10 million ...
... University of Notre Dame, The Nature Conservancy, and Central Michigan ... the Great Lakes in a study published in the ... "The good news is that we have found no evidence ... despite extensive surveys in Southern Lake Michigan and parts of ...
... with their marriage gain weight in the early years ... for various health problems related to being overweight. ... marital satisfaction and weight gain, according to psychologist Andrea ... Southern Methodist University in Dallas. "On average, spouses ...
Cached Biology News:Invention could make spent nuclear fuel useful for irradiation purposes 2Notre Dame study finds Asian carp DNA not widespread in the Great Lakes 2Marriage can threaten health: Study finds satisfied newlyweds more likely to gain weight 2
(Date:7/30/2014)... July 30, 2014 Yuma Regional ... and complementary therapies brings comprehensive cancer care to ... Yuma Regional Cancer Center has officially opened. A ... program includes services such as open, semi-private and ... American Cancer Society Resource Center, hematology, rehabilitation center, ...
(Date:7/30/2014)... July 30, 2014 Researchers often use ... biology, but such devices can do much more ... As such, researchers have looked to patterned assemblies ... metabolic engineering to characterize – and potentially ... devices are envisioned to recreate animal and human ...
(Date:7/30/2014)... , July 30, 2014  RXi Pharmaceuticals ... biotechnology company focused on discovering, developing and ... needs using RNA-targeted technologies, today announced that ... RXI-109, for the reduction of recurrence of ... has been initiated. Logo - ...
(Date:7/30/2014)... Diego, CA (PRWEB) July 30, 2014 ... contract from the U.S. Environmental Protection Agency (EPA). ... expertise in developmental toxicity models, including tests designed ... neuron formation and the formation of connections between ... Inhibition of neurodifferentiation and synapse formation by environmental ...
Breaking Biology Technology:Sate-of-the-Art Yuma Regional Cancer Center Officially Opens 2UMD Researchers Bridge Gap between Microelectronics, Biological Systems 2UMD Researchers Bridge Gap between Microelectronics, Biological Systems 3UMD Researchers Bridge Gap between Microelectronics, Biological Systems 4RXi Pharmaceuticals Expands Clinical Program with Initiation of Third Phase 2a Study with RXI-109 for Treatment of Hypertrophic Scars 2RXi Pharmaceuticals Expands Clinical Program with Initiation of Third Phase 2a Study with RXI-109 for Treatment of Hypertrophic Scars 3RXi Pharmaceuticals Expands Clinical Program with Initiation of Third Phase 2a Study with RXI-109 for Treatment of Hypertrophic Scars 4RXi Pharmaceuticals Expands Clinical Program with Initiation of Third Phase 2a Study with RXI-109 for Treatment of Hypertrophic Scars 5U.S. Environmental Protection Agency (EPA) Awards Vala Sciences a Second ToxCast Contract 2U.S. Environmental Protection Agency (EPA) Awards Vala Sciences a Second ToxCast Contract 3
... - Eagle Technology Inc. , the company whose ... Museum , is extending its market reach with a ... management solutions provider based here, acquired Equipsoft Corp. ... this week. , ,"Equipsoft offers a complementary product line. ...
... Wis. - To differentiate himself from other presidential ... is casting himself as the candidate of new ideas ... ways to accelerate the adoption of electronic health records ... the Wisconsin Biotechnology and Medical Device Association . ...
... I gave a luncheon speech to the Chicago Bar Association ... Century." At that time, many who attended thought ... much faith in it. My argument was that the horse-and-buggy ... out. Municipalities would have to become more creative to seek ...
Cached Biology Technology:Eagle Technology acquires some synergy 2Tommy Thompson says capital needed for electronic health records 2Tommy Thompson says capital needed for electronic health records 3Tommy Thompson says capital needed for electronic health records 4Creativity, innovation extend to municipalities 2Creativity, innovation extend to municipalities 3Creativity, innovation extend to municipalities 4
APO-BrdU™ TUNEL Assay Kit *with Alexa Fluor® 488 anti-BrdU* *60 assays*...
The FlowTACS Apoptosis Detection Kit is designed specifically for in situdetection of apoptotic...
Recombinant Rat PTX2/SAP...
Request Info...
Biology Products: