Linked Life Data

8134923

Source:http://linkedlifedata.com/resource/pubmed/id/8134923

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1994-4-21
pubmed:abstractText
Polybrominated diphenyl ethers are manufactured for use as flame retardants in commercial plastics and textiles in Europe and North America. These studies investigated the acute and subchronic immunotoxicity and endocrine effects of a commercial pentabromodiphenyl either mixture, DE-71, in female C57BL/6 mice. Mice were orally exposed to acute single doses of DE-71 of 0, 0.8, 4.0, 20, 100, or 500 mg/kg, or to subchronic daily doses totaling 0, 250, 500, or 1000 mg/kg over a 14 day period. Immunotoxicity was assessed by measuring the plaque-forming cell response to sheep erythrocytes (SRBC) and natural killer cell (NKC) activity (basal and poly I:C stimulated) to YAC-1 target cells. Liver cytochrome P450 content and activities (ethoxyresorufin-o-deethylase (EROD) and pentoxyresorufin-o-deethylase (PROD)) as well as corticosterone (CS) and thyroxine (T4) concentrations were also measured. PROD activity was induced 3-5-fold in mice exposed acutely or subchronically to DE-71 at doses > 250 mg/kg. EROD activity and total microsomal cytochrome P450 content were significantly induced only in mice treated subchronically with DE-71; maximum induction of EROD was 3.3-fold. Total serum T4 concentrations were significantly lower in mice treated acutely with DE-71 at all doses except the 100 mg/kg dose. Total and free T4 concentrations were dose-dependently decreased in DE-71-treated mice following subchronic exposure. Plasma CS levels were elevated following subchronic exposure to DE-71. The elevation of CS was correlated with order of capture at necropsy, suggesting an interactive effect of DE-71 and stress. In regard to immunotoxicity, significant suppression of the anti-SRBC response was seen only in mice exposed subchronically to 1000 mg DE-71/kg, an exposure that also resulted in decreased thymus weight. NKC activity was not altered by exposure to DE-71.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0300-483X
pubmed:author
pubmed:issnType
Print
pubmed:day
26
pubmed:volume
86
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
49-61
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed-meshheading:8134923-Animals, pubmed-meshheading:8134923-Corticosterone, pubmed-meshheading:8134923-Cytochrome P-450 CYP2B1, pubmed-meshheading:8134923-Cytochrome P-450 Enzyme System, pubmed-meshheading:8134923-Endocrine Glands, pubmed-meshheading:8134923-Endocrine System Diseases, pubmed-meshheading:8134923-Erythrocytes, pubmed-meshheading:8134923-Female, pubmed-meshheading:8134923-Flame Retardants, pubmed-meshheading:8134923-Glucocorticoids, pubmed-meshheading:8134923-Halogenated Diphenyl Ethers, pubmed-meshheading:8134923-Hydrocarbons, Brominated, pubmed-meshheading:8134923-Immune System, pubmed-meshheading:8134923-Immune System Diseases, pubmed-meshheading:8134923-Killer Cells, Natural, pubmed-meshheading:8134923-Liver, pubmed-meshheading:8134923-Mice, pubmed-meshheading:8134923-Mice, Inbred C57BL, pubmed-meshheading:8134923-Microsomes, Liver, pubmed-meshheading:8134923-Organ Size, pubmed-meshheading:8134923-Oxidoreductases, pubmed-meshheading:8134923-Phenyl Ethers, pubmed-meshheading:8134923-Polybrominated Biphenyls, pubmed-meshheading:8134923-Sheep, pubmed-meshheading:8134923-Thyroxine
pubmed:year
1994
pubmed:articleTitle
Immunologic and endocrine effects of the flame-retardant pentabromodiphenyl ether (DE-71) in C57BL/6J mice.
pubmed:affiliation
Toxicology Program, Oregon State University, Corvallis 97331.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.