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:4/23/2014)... conclusive evidence that the source of a unique rhythmic ... called the "bio-duck," is the Antarctic minke whale ( ... personnel in the 1960s who thought it sounded like ... various locations in the Southern Ocean, but its source ... 2013, an international team of researchers deployed acoustic tags ...
(Date:4/23/2014)... the likelihood of an accurate group decision increases with ... when a collective faces a variety of factors ... University researchers report that smaller groups actually tend to ... excessively focused on only certain pieces of information. , ... known about collective intelligence, or the "wisdom of crowds," ...
(Date:4/23/2014)... The shale gas boom has transformed the energy ... locations, it could cause conflict among the energy ... resources, say researchers. They add that degraded water ... adequate safeguards. The feature article appears in the ... , Meagan S. Mauter and colleagues point out ...
Breaking Biology News(10 mins):Scientists identify source of mysterious sound in the Southern Ocean 2Scientists identify source of mysterious sound in the Southern Ocean 3Too many chefs: Smaller groups exhibit more accurate decision-making 2Too many chefs: Smaller groups exhibit more accurate decision-making 3How to avoid water wars between 'fracking' industry and residents 2
... January 11, 2010 Why do some people like to ... hand, taking the opposite tack by buying insurance to reduce ... Hebrew University of Jerusalem and two Asian universities say the ... team set out to tackle the long-standing question in economic ...
... standards to help ensure the quality and enhance the ... and a variety of functional foods are being proposed ... internationally recognized compendium of quality standards for food ingredients. ... breast milk and commonly added to infant formula, and ...
... Ohio Blocking the function of an enzyme in the ... nerve cells from dying after a stroke, new research suggests. ... that the tocotrienol form of vitamin E, an alternative to ... acids that eventually kill neurons. The Ohio State University ...
Cached Biology News:Why do people 'play the longshot' and buy insurance? It's in our genes 2Quality and safety of infant formulas, functional foods enhanced by new standards 2Quality and safety of infant formulas, functional foods enhanced by new standards 3Study reveals how one form of natural vitamin E protects brain after stroke 2Study reveals how one form of natural vitamin E protects brain after stroke 3
(Date:1/15/2014)... 2014  Bill Jacobs Automotive, a group of car dealerships headquartered ... the Heartland Blood Center and offering free oil change coupons ... place Saturday, Jan. 18 at the Bill Jacobs Cadillac and ... (Photo: http://photos.prnewswire.com/prnh/20140115/MN46637 )  The Bill Jacobs ...
(Date:1/15/2014)... Westlake Village, Calif. (PRWEB) January 15, 2014 ... cancer treatment and management through the genomic analysis of ... will offer Therapy Finder™, a web-based cancer decision support ... a reporting option with Cynvenio’s ClearID™ genomic test, Therapy ...
(Date:1/15/2014)... A study has been launched to test whether technology ... help to tackle the problem of obesity.  This unique healthcare ... based in Stowmarket) and academics at University Campus Suffolk is ... which is inspired by equipment used to collect data about ...
(Date:1/15/2014)... (PRWEB) January 15, 2014 DTS Language ... its Online Web Portal for Life Science organizations who need ... specify the subject matter of their documents in advance with ... help reduce time-to-delivery of translations, often a critical factor in ...
Breaking Biology Technology:Join the Bill Jacobs Auto blood drive and receive a free oil change 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 4DTS Improves Efficiency for Life Science Document Translations 2
... REDWOOD CITY, Calif., March 4 Maxygen, Inc.,(Nasdaq: ... the development of,improved protein drugs, today announced changes ... president in charge of global,business development and U.S. ... business officer. In addition, the company announced the,pending ...
... new independent non-executive directors added to Board with ... ... appointed independent non-executive Chairman, BRISBANE, Australia, March 4 ... John Lee and Robert Williamson to the Company,s Board as,independent ...
... Biosciences,(Nasdaq: MATK ) announced today that life,sDHA, its ... heart health, is available in new So,Good Omega DHA ... selling soymilk brand. Available in original or vanilla flavor, ... major retailers throughout,Canada., "So Good Omega DHA Soymilk ...
Cached Biology Technology:Maxygen Announces Management Changes 2Progen Expands Board of Directors 2Progen Expands Board of Directors 3Progen Expands Board of Directors 4Canada's Best-Selling Soymilk Now Available with Martek's life'sDHA 2Canada's Best-Selling Soymilk Now Available with Martek's life'sDHA 3
... Blocker Array II can be used ... against various proteins and sera that are ... carriers. The array contains spots for 19 ... Application: Determination of antibody crossreactivity and species ...
... Tecans new HydroFlex platform provides excellent ... range of 96-well format applications, including ... protein arrays, and vacuum filtration-to-waste, such ... outstanding on-line control features set new ...
... and Accurate Results Laser Capture Microdissection ... sensitivity and accuracy of molecular assays by ... and multi-cellular structures isolated from whole tissue ... microdissection-developed in 1996 at the National Institutes ...
...
Biology Products: