Navigation Links
Mercury pollution causes immune damage to harbor seals
Date:10/20/2008

Methylmercury (MeHg), the predominant form of mercury found in the blood of marine mammals and fish-eating communities, could be more damaging to seals than has previously been thought. Research published in BioMed Central's open access journal Environmental Health shows that MeHg harms T-lymphocytes, key cells in a seal's immune system. Similar results were also found for human lymphocytes.

Mercury exposure is known to occur as a result of man-made pollution and natural events such as volcanic eruptions. According to the lead author of this study, Krishna Das of the Universit de Lige, Belgium, "Mercury is known to bioaccumulate and to magnify in marine mammals, which is a cause of great concern in terms of their general health. In particular, the immune system is known to be susceptible to long-term mercury exposure". In order to determine the scale of this problem, the authors carried out analysis of the blood mercury levels of harbour seals caught in the North Sea and tested the effects of MeHg in lab experiments.

By applying increasing doses of MeHg to lymphocytes, a type of white blood cell, the authors determined that the amount of mercury found in the blood of the seals studied was enough to cause damage to the important immune system cells. They said, "Although the in vitro approach utilised in this investigation represents an extreme reductionism relative to the complex situation in the intact organism, it provides an insight into the specific effects of mercury pollution."

Immune system damage may already have taken a toll on the population of harbour seals. The 1998 and 2002 outbreaks of phocine distemper virus, known to have killed thousands of seals, were linked to the deleterious effects of pollution on the seals' ability to fight the infection.


'/>"/>

Contact: Graeme Baldwin
graeme.baldwin@biomedcentral.com
44-020-707-94804
BioMed Central
Source:Eurekalert

Page: 1

Related biology news :

1. International team shows mercury concentrations in fish respond quickly to increased deposition
2. Groundbreaking Canada-US study proves link between emissions and mercury pollution in fish
3. New study shows fish respond quickly to changes in mercury deposition
4. New study shows fish respond quickly to changes in mercury deposition
5. International team shows mercury concentrations in fish respond quickly to increased deposition
6. Groundbreaking Canada-US study proves link between emissions and mercury pollution in fish
7. Waterborne carbon increases threat of environmental mercury
8. Dartmouth researchers alarmed by levels of mercury and arsenic in Chinese freshwater ecosystem
9. Washington University, 2 industries, team to clean up mercury emissions
10. Dental chair a possible source of neurotoxic mercury waste
11. Study shows mercury levels from products decreasing, though still at dangerous levels
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/24/2017)... , Mar 24, 2017 Research and Markets ... System Market Analysis & Trends - Industry Forecast to 2025" ... ... grow at a CAGR of around 15.1% over the next decade ... industry report analyzes the market estimates and forecasts for all the ...
(Date:3/23/2017)... 23, 2017 Research and Markets has announced ... & Trends - Industry Forecast to 2025" report to their ... The ... CAGR of around 8.8% over the next decade to reach approximately ... the market estimates and forecasts for all the given segments on ...
(Date:3/22/2017)... March 21, 2017 Optimove , ... by retailers such as 1-800-Flowers and AdoreMe, today ... Recommendations and Replenishment. Using Optimove,s machine learning algorithms, ... product and replenishment recommendations to their customers based ... predictions of customer intent drawn from a complex ...
Breaking Biology News(10 mins):
(Date:5/23/2017)... ... 2017 , ... Bacterial biofilms, surface adherent communities of bacteria that are encased ... food poisoning and catheter infections to gum disease and the rejection of medical implants. ... dollars per year, there is currently a paucity of means for preventing their formation ...
(Date:5/22/2017)... (PRWEB) , ... May 22, 2017 , ... ... today that it is exhibiting in booth B2 at the Association for ... May 22-25. , In addition to demonstrating its Cancer Diagnostic Cockpit and ...
(Date:5/18/2017)... ... May 18, 2017 , ... Dr. Ralph ... at the Prince Of Wales Private Hospital. The procedure was performed on a ... patient failed conservative treatments prior to undergoing surgery. , The AxioMed viscoelastic disc ...
(Date:5/18/2017)... ... May 17, 2017 , ... Cognition Corporation ... has just released version 9.0 of the Cognition Cockpit platform. , “Our whole ... says David Cronin, CEO of Cognition. “We’re thrilled to finally be able to ...
Breaking Biology Technology: