Navigation Links
Scientists discover the mechanism of heart failure in fish exposed to oil spills
Date:2/14/2014

ith each heartbeat, countless cardiac muscle cells are synchronized so that their individual contractions add up to the coordinated pumping action of the heart. Near the end of each contraction cycle, positively charged potassium ions flow out of the muscle cell through ion channels in the cell membrane, priming the cell for the next cycle. This new research demonstrates that PAHs can block potassium ion channels in the heart cells of tunas. They can also disrupt calcium ion cycling within isolated muscle cells. Together, these effects are thought to underlie the slowed or irregular heartbeats observed in fish embryos exposed to crude oil.

"When we see these kinds of acute effects at the cardiac cell level," said Barbara Block, who led the team of Stanford University scientists working on this study, "it is not surprising that chronic exposure to oil from spills such as Deepwater Horizon can lead to long-term problems in fish hearts."

The study notes that, because the structure of ion channels is similar in the heart muscle cells of many species, related disruptions might occur in the hearts of other vertebrates.

To demonstrate the effect of PAHs on the cardiac cells of tuna, scientists had to measure the flow of electrical current across the membranes of individual cells. "That requires some very specialized skills and equipment," said John Incardona, another NOAA scientist and a coauthor of the study.

This experimental capacity was provided by the Tuna Research and Conservation Center, jointly operated by Stanford University and the Monterey Bay Aquarium. Scientists there measured the electrical properties of individual heart muscle cells using a "patch clamp" technique, which involves micron-scale glass electrodes.

The Stanford scientists provided expertise in tuna husbandry, cardiac physiology, single-cell electrophysiology, and optical imaging. NOAA's Ecotoxicology Program provided expertise in designing oil exposure studies, and in understa
'/>"/>

Contact: Rich Press
rich.press@noaa.gov
NOAA National Marine Fisheries Service
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Stanford scientists develop gene therapy approach to grow blood vessels in ischemic limbs
2. Queens scientists seek vaccine for Pseudomonas infection
3. Scientists produce eye structures from human blood-derived stem cells
4. American Society of Plant Biologists honors early career women scientists
5. Brandeis scientists win prestigious prize for circadian rhythms research
6. Scientists discover new method of proton transfer
7. Salk scientists open new window into how cancers override cellular growth controls
8. WileyChina.com - Now Featuring Bespoke Pages for China’s Life Scientists
9. Scientists win $2 million to study new pathway in development and maintenance of lymphoma
10. UGA scientists reveal genetic mutation depicted in van Goghs sunflower paintings
11. Genetic mutation depicted in van Goghs sunflower paintings revealed by scientists
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists discover the mechanism of heart failure in fish exposed to oil spills
(Date:8/29/2014)... been known about what genetic changes transform wild animals ... of whom is a University of Montana assistant professor, ... the development of the brain and the nervous system ... published Aug. 28 in Science and gives ... http://www.sciencemag.org/ ., The domestication of animals and plants, ...
(Date:8/29/2014)... and number of connections in transcription factor networks (TFNs) ... a study published in PLOS Computational Biology ... signature contributes to a network,s resilience against mutations. ... assortativity of TFN models has a greater effect on ... of assortativity," said Dov A. Pechenick, PhD, lead author ...
(Date:8/29/2014)... marine phytoplankton, such as the prolific bloomer Emiliania ... researchers have discovered. The finding contradicts the common view ... microbes depend on scarce supplies of thiamine in the ... to think about the ocean," says CIFAR Senior Fellow ... Journal paper with CIFAR fellows John Archibald ...
Breaking Biology News(10 mins):New research reveals how wild rabbits were genetically transformed into tame rabbits 2New research reveals how wild rabbits were genetically transformed into tame rabbits 3Assortativity signatures of transcription factor networks contribute to robustness 2Not all phytoplankton in the ocean need to take their vitamins 2Not all phytoplankton in the ocean need to take their vitamins 3
... of the most serious mental illnesses and is accompanied ... as well as genetic factors form a complex interplay ... the Internet editions of the professional journals " Nature ... ground-breaking step in the complex and extraordinarily difficult search ...
... of California, Berkeley, virologist and an assistant professor in the ... M. Keck Foundation grant, an award given to innovative young ... which totals up to $1 million over five years, will ... herpesvirus as a tool to study the inner workings of ...
... WORCESTER, Mass.In recent years, a class of small molecules known ... in regulating gene products in most animal and plant species. ... development of alcohol tolerance, a hallmark of alcohol abuse and ... and Alcoholism (NIAAA) report the findings in the July 31 ...
Cached Biology News:Advances in the field of schizophrenia research: New genetic factors identified 2Advances in the field of schizophrenia research: New genetic factors identified 3UC Berkeley virologist named Keck Distinguished Young Scholar 2MicroRNA implicated as molecular factor in alcohol tolerance 2
(Date:8/29/2014)... A major challenge before new biotechnology start-up ... of Boston-Cambridge, is gaining visibility that can lead to ... Director of Boston’s Adult Stem Cell Technology Center, LLC ... of his company an important priority since he started ... a social media marketing campaign launched earlier ...
(Date:8/28/2014)... 28, 2014 “This kit has an improved ... from 0 to 150 ppb,” said Mark Tess, PhD, Mycotoxin ... benefit to plant owners and USDA-GIPSA inspection agencies that have ... Testing can take place in a matter of minutes with ... plant test the feed and grain before accepting it, but ...
(Date:8/28/2014)... , Aug. 28, 2014  Next month, executives from clinical ... key industry events beginning with Patient-Centered Clinical Trials 2014 ... Boston , September 4-5. Patient recruitment experts ... Aaron Fleishman will share insights on the benefits ... variety of tactics – from media to mobile apps – ...
(Date:8/28/2014)... USA (PRWEB) August 27, 2014 Scientists, ... month for SPIE Laser Damage 2014 symposium. ... materials for high-power lasers will run 14-17 September. The ... for optics and photonics . , The premier conference ... understanding laser damage to optical materials will engage researchers ...
Breaking Biology Technology:The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 2The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 3The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 4BBK Worldwide Leads Sessions at Key September Events 2Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 2Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 3
... catalysts and video displays are among the potential applications ... These particles are named after the two-faced Roman god ... form novel structures and new materials. However, as scientists ... a few nanometers in diameter about the size ...
... Pa., Sept. 27, 2011 Renmatix , ... the Plantrose™ process, the company,s commercial approach to ... to non-food derived low-cost industrial sugars, the foundation ... dramatic shift from petroleum-based fuels and chemicals to ...
... be coming to a little screen near you. These ... of displaying information on cell phones, e-readers and iPads, and ... solar cells, according to new research. Duke chemist Ben ... organize copper atoms in water to form long, thin, non-clumped ...
Cached Biology Technology:New technique maps twin faces of smallest Janus nanoparticles 2Renmatix Reveals Supercritical Hydrolysis as Lowest-Cost Pathway to Cellulosic Sugar 2Renmatix Reveals Supercritical Hydrolysis as Lowest-Cost Pathway to Cellulosic Sugar 3Copper film could lower touch screen, led and solar cell costs 2
HistoScan AP Universal Goat Kit...
4',6-Diamidino-2-phenylindole dihydrochloride...
No description available in Ensembl Antigen: Recombinant Protein Epitope Signature Tag (PrEST)....
Sheep polyclonal to Quinolone ( Abpromise for all tested applications). Antigen: Norfloxacin(N)conjugated to BSA...
Biology Products: