US EPA

1510253 

Journal Article 

Polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs) and neuropsychological status among older adults in New York 

Fitzgerald, EF; Shrestha, S; Gomez, MI; Mccaffrey, RJ; Zimmerman, EA; Kannan, K; Hwang, SA 

2012 

1 

NeuroToxicology
ISSN: 0161-813X
EISSN: 1872-9711 

33 

1 

8-15 

English 

22079442 

10.1016/j.neuro.2011.10.011 

WOS:000300519500002 

Polybrominated diphenyl ethers (PBDEs) are emerging environmental contaminants, but little is known about their possible human health effects. The objective of this study is to evaluate the association between exposure to PBDEs and neuropsychological function among older adults and the possibility of effect modification with polychlorinated biphenyls (PCBs). Serum samples were analyzed for concentrations of 9 PBDE and 30 PCB congeners and 34 tests of cognitive and motor function, affective state, and olfactory function were assessed among 144 men and women of 55-74 years of age. After adjustment for relevant confounders, no overall associations were observed between the sum of the PBDE congener concentrations in serum (∑ PBDE) and scores on the neuropsychological tests. However, statistically significant interactions were found between PBDEs and PCBs for some measures of verbal learning and memory. Among persons with ∑ PCB concentrations at or above the median of 467ppb (lipid basis), an increase in ∑ PBDE concentrations from the 25th to 75th percentile was associated with decreases between 7% and 12% on scores for certain subscales of the California Verbal Learning Test. In contrast, no statistically significant associations were observed for PBDEs among persons with ∑ PCB levels below the median. The results suggest that PBDEs and PCBs may interact to affect verbal memory and learning among persons 55-74 years old. This is the first study to evaluate the neuropsychological effects of PBDEs in adults and the possibility of synergy with PCBs in humans. 

Adult; Hazardous waste; Neuropsychological tests; Polybrominated diphenyl ethers; Polychlorinated biphenyls