Heavy consumption of tainted fish curbs adult learning and memory

CHAMPAIGN, Ill. PCB-laden fish from Lake Michigan affect not only young children but also adults over age 49, researchers say. Many of the former big eaters of sport-caught fish now have high levels of polychlorinated biphenyls in their blood and problems with learning and memory.

Since 1992, researchers, led by Susan L. Schantz of the University of Illinois College of Veterinary Medicine, have studied Lake Michigan fish-eaters, many of whom regularly had eaten more than 24 pounds of sport-caught fish a year. The researchers latest findings show that the heavy eaters who are now over age 49 have problems learning and remembering new verbal information.

"This study suggests, for the first time, that PCB body burdens in adulthood may be associated with impairments in certain aspects of memory and learning," Schantz said. "The focus has been almost exclusively on increased health risks of exposure to children and pregnant women. It had been assumed that mature adults are less susceptible than are developing fetuses. This may not be the case." PCBs were widely used until banned in the late 1970s as electrical insulators and lubricants and as extenders in paints and varnishes. The chemicals decompose slowly and are virtually non-biodegradable. Large quantities remain in older electrical equipment still in use. In the Great Lakes, PCBs make their way up the food chain and accumulate at increasing levels in fatty tissue. The new study by researchers at four institutions is to go on line June 5 and appear in print in the June issue of Environmental Health Perspectives, a journal of the National Institutes of Health. They also found elevated levels of DDE (a breakdown product of DDT), lead and mercury in the heavy fish-eaters, but the only negative effects were tied to blood serum levels of PCBs.

Fish-eaters with high blood PCB levels had difficulties recalling a story told just 30 minutes earlier. They also were less likely than their less-exposed p

Contact: Jim Barlow
University of Illinois at Urbana-Champaign

Page: 1 2

Related biology news :

1. Old Sins Industrial Metabolism, Heavy Metal Pollution, and Environmental Transition in Central Europe
2. Heavy metal research is music to biologists ears
3. Engineered Bacteria Scavenge Heavy Metals
4. Dartmouth Medical School Researchers Discover Heavy Metal Contamination In Northern Mexico
5. Heavy Traffic At The Nuclear Pore: How Proteins And RNA Leave The Cell Nucleus
6. Ecological Farming May Cause More Heavy Metals In The Soil
7. PET Project Helps Reduce Pollution Threat From Heavy Metals
8. Genes can influence both alcohol consumption and dependence
9. Parents are top influence on soft-drink consumption among kids
10. Milk consumption and calcium intake associated with lower colorectal cancer risk
11. Moderate alcohol consumption increases plasma levels of a protective hormone

Post Your Comments:

(Date:8/5/2020)... ... , ... Regenative Labs has received approval from the Centers for Medicare & ... first Wharton’s jelly allografts to be assigned a Q code and be approved for ... Wharton’s jelly allograft product to be recognized as a 361 HCT/P by CMS regulated ...
(Date:7/18/2020)... ... July 16, 2020 , ... A study has been published ... Neoasis™ active noise control device to attenuate typical noises in a simulated neonatal ... the alarm sounds from patient monitors, ventilators and other bedside devices that would ...
(Date:7/2/2020)... ... July 01, 2020 , ... AltruBio Inc. http://www.altrubio.com ... a biologic for the treatment of steroid-refractory acute graft-versus-host disease (SR-aGVHD), at European ... J Martin of the Fred Hutchinson Cancer Research Center, this single-arm, open-label Phase ...
Breaking Biology News(10 mins):
(Date:8/12/2020)... FARMS, Mich. (PRWEB) , ... August 12, 2020 ... ... Consulting Group, Inc. (EMMA International), a global leader in FDA compliance consulting ... of the nation’s fastest-growing private companies. The list represents a unique look at ...
(Date:8/3/2020)... (PRWEB) , ... August 03, 2020 , ... ... collection, today announced Jim Corrigan, President and CEO has been named one of ... broad cross-section of industry sectors, PharmaVoice 100 honorees are selected based on how ...
(Date:7/31/2020)... ... July 29, 2020 , ... R3 Stem Cell International is ... $3950. With 50 million stem cells total, patients may choose which extremities they would ... for arthritic joints (BMC Musculoskelet Disord. 2016). At R3 International, umbilical cord tissue is ...
(Date:7/31/2020)... ... July 29, 2020 , ... ... transmitter systems that can be configured to drive Klystrons, TWTs, IOTs, and magnetrons. ... drive one or two switches in a push-pull configuration; yielding fast fall time ...
Breaking Biology Technology:
Cached News: