Navigation Links
Study finds flame retardants at high levels in pet dogs
Date:4/25/2011

BLOOMINGTON, Ind. -- Indiana University scientists have found chemical flame retardants in the blood of pet dogs at concentrations five to 10 times higher than in humans, but lower than levels found in a previous study of cats.

Their study, "Flame Retardants in the Serum of Pet Dogs and in their Food," appears this month in the journal Environmental Science & Technology. Authors are Marta Venier, an assistant research scientist in the School of Public and Environmental Affairs, and Ronald Hites, a Distinguished Professor in SPEA.

Venier and Hites explore whether pets could serve as "biosentinels" for monitoring human exposure to compounds present in the households that they share. Dogs may be better proxies than cats, they say, because a dog's metabolism is better equipped to break down the chemicals.

The study focuses on the presence of polybrominated diphenyl ethers (PBDEs) in the blood of dogs and in commercial dog food. PBDEs have been widely used as flame retardants in household furniture and electronics equipment. The compounds can migrate out of the products and enter the environment.

"Even though they've been around for quite awhile, we don't know too much about these compounds' toxicological effects on humans or animals," Venier said. "The bottom line is that we still need to keep measuring them, particularly in homes."

PBDE mixtures made up of less-brominated compounds are regarded as more dangerous because they bioaccumulate in animal tissues. These mixtures were banned by the European Union and were voluntarily removed from the U.S. market in 2004, but remain in the environment. Mixtures with more-brominated compounds remain in use in the U.S. but will be phased out by 2013.

Venier and Hites report on an analysis of flame retardants in blood from 17 pet dogs, all of whom live primarily indoors. They also examined samples of the dry dog food that made up the pets' diet, attempting to determine if food was a major source of PBDE exposure.

The average concentration of PBDEs in blood from the dogs was about 2 nanograms per gram, about five to 10 times higher than the levels found in humans in the few studies of human exposure that have been done in North America.

In dog food samples, the researchers found PBDEs at levels averaging about 1 nanogram per gram. That is much higher than levels found in meat and poultry sold as food for humans, suggesting the PBDEs in dog food may result from processing rather than from the food sources.

A 2007 study by Venier, Hites and several co-authors found concentrations of PBDEs in house cats that were 20 to 100 times higher than levels found in humans. A 2010 article by Venier, Hites and two Clemson University researchers also reported high levels of PBDEs in nesting bald eagles.

Venier said the evidence shows dogs metabolize the compounds more rapidly than cats. A previous study showed that dogs produce an enzyme that breaks down organochlorine pesticides, and a similar mechanism may be at work with brominated compounds.

The current study also detected newer flame retardants that have come onto the market as PBDEs have been removed, including Dechlorane Plus, decabromodiphenylethane, and hexabromocyclododecane. The chemicals are largely unregulated but pose concerns because they are structurally similar to organic pollutants that have been linked to environmental and human health effects.

"The concentrations of these newer flame retardants were relatively low compared to the PBDEs," Venier said, "but the fact that they are new and not regulated suggests their levels are going to increase in the future."


'/>"/>

Contact: Steve Hinnefeld
slhinnef@indiana.edu
812-856-3488
Indiana University
Source:Eurekalert

Related biology news :

1. Study: Reasonable quantities of red pepper may help curb appetite
2. Study shows how mosquitoes handle the heat of a hot blood meal
3. Study in roundworm chromosomes may offer new clues to tumor genome development
4. Gulf oil spill similar to Exxon Valdez in initial social and mental impacts, study finds
5. Study of deer mice on Californias Channel Islands provides new information on hantavirus
6. VIMS study: Propeller turbulence may affect marine food webs
7. Reptilian root canal: U of T Mississauga study reveals infection in jaw of ancient fossil
8. Nationwide study finds US meat and poultry is widely contaminated
9. New study finds stronger regulations of in vitro fertilization may save lives
10. Study: Algae could replace 17 percent of US oil imports
11. Scots carbon emissions could be halved in decades, study suggests
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/11/2016)... SAN JOSE, Calif. , Jan. 11, 2016 /PRNewswire/ ... developer of human interface solutions, today announced that its ... display driver integration (TDDI) products won two separate categories ... including Best Mobile Innovator and Best Technology Breakthrough. The ... overall system cost, a simplified supply chain, thinner devices, ...
(Date:1/8/2016)... MANCHESTER, United Kingdom , Jan. 8, 2016 ... innovative sensor-based diagnostic products, today announced the closing of a ... existing investors.  Proceeds from the financing will be used to ... hand-held device for detecting early-stage pressure ulcers. ... after receiving CE Mark approval. The device,s introduction has ...
(Date:1/7/2016)... NEW YORK , Jan. 7, 2016 ... as regional markets for biometric technologies and devices, identifying ... application market for various types of biometric devices. Includes ... report to: Identify newer markets and explore the ... of biometric devices. Examine each type of biometric technology, ...
Breaking Biology News(10 mins):
(Date:2/4/2016)... Feb. 4, 2016  Sangamo BioSciences, Inc. (NASDAQ: ... today that Edward Lanphier , Sangamo,s president and ... progress of Sangamo,s ZFP Therapeutic ® development programs ... 2:40 pm ET on Thursday, February 11, 2016, at ... Conference. The conference is being held in ...
(Date:2/4/2016)... VANCOUVER, British Columbia and MENLO PARK, ... Inc. (OTCQX: DMPI) ("DelMar" and the "Company"), a biopharmaceutical ... therapies, today announced that it will present at the ... on Monday, February 8, 2016 at 10:00 a.m. EST in ... Jeffrey Bacha , DelMar,s president and CEO, will provide an ...
(Date:2/4/2016)... ... February 04, 2016 , ... ... of Semantic Graph Database technology has been recognized As “ Best in Semantic ... America Magazine. , “At Corporate America, it’s our priority to showcase prominent professionals ...
(Date:2/3/2016)... 3, 2016  With the growing need for ... is underway, therapies such as monoclonal antibodies, recombinant ... host of indications are in high demand. Conventionally ... development and production of these therapeutics. However, due ... high costs, novel approaches and novel expression systems ...
Breaking Biology Technology: