McKinney, Melissa A; Dietz, Rune; Sonne, Christian; De Guise, Sylvain; Skirnisson, Karl; Karlsson, Karl; Steingrimsson, Egill; Letcher, Robert J (2011): (Tables 1,2) Polar bear (Ursus maritimus), beluga whale (Delphinapterus leucas) and ringed seal (Pusa hispida) liver microsomal protein content and EROD activity [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.816176, Supplement to: McKinney, MA et al. (2011): Comparative hepatic microsomal biotransformation of selected PBDEs, including decabromodiphenyl ether, and decabromodiphenyl ethane flame retardants in Arctic marine-feeding mammals. Environmental Toxicology and Chemistry, 30(7), 1506-1514, https://doi.org/10.1002/etc.535
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Abstract:
The present study assessed and compared the oxidative and reductive biotransformation of brominated flame retardants, including established polybrominated diphenyl ethers (PBDEs) and emerging decabromodiphenyl ethane (DBDPE) using an in vitro system based on liver microsomes from various arctic marine-feeding mammals: polar bear (Ursus maritimus), beluga whale (Delphinapterus leucas), and ringed seal (Pusa hispida), and in laboratory rat as a mammalian model species. Greater depletion of fully brominated BDE209 (14-25% of 30pmol) and DBDPE (44-74% of 90pmol) occurred in individuals from all species relative to depletion of lower brominated PBDEs (BDEs 99,100, and 154; 0-3% of 30pmol). No evidence of simply debrominated metabolites was observed. Investigation of phenolic metabolites in rat and polar bear revealed formation of two phenolic, likely multiply debrominated, DBDPE metabolites in polar bear and one phenolic BDE154 metabolite in polar bear and rat microsomes. For BDE209 and DBDPE, observed metabolite concentrations were low to nondetectable, despite substantial parent depletion. These findings suggested possible underestimation of the ecosystem burden of total-BDE209, as well as its transformation products, and a need for research to identify and characterize the persistence and toxicity of major BDE209 metabolites. Similar cause for concern may exist regarding DBDPE, given similarities of physicochemical and environmental behavior to BDE209, current evidence of biotransformation, and increasing use of DBDPE as a replacement for BDE209.
Project(s):
Coverage:
Median Latitude: 63.555667 * Median Longitude: -59.660333 * South-bound Latitude: 60.980000 * West-bound Longitude: -93.710000 * North-bound Latitude: 65.187000 * East-bound Longitude: -19.500000
Date/Time Start: 2001-07-01T00:00:00 * Date/Time End: 2008-06-01T00:00:00
Event(s):
Cumberland_Sound * Latitude: 65.187000 * Longitude: -65.771000 * Location: Labrador Sea * Method/Device: Biological sample (BIOS)
Iceland * Latitude: 64.500000 * Longitude: -19.500000 * Location: Iceland * Method/Device: Multiple investigations (MULT)
Comment:
Mean and standard deviation of interday duplicate assays (n=3 replicates/assay), except RS2 microsomal yield is of single day replicates. Sampling positions approximate. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample ID | Sample ID | McKinney, Melissa A | |||
| 3 | Species, common name | Species common | McKinney, Melissa A | |||
| 4 | Species | Species | McKinney, Melissa A | |||
| 5 | Sample type | Samp type | McKinney, Melissa A | |||
| 6 | Area/locality | Area | McKinney, Melissa A | #PB1 was stranded in Iceland as the sea ice retreated during the summer; it is thus likely to be an individual from the East Greenland subpopulation | ||
| 7 | DATE/TIME | Date/Time | Geocode | |||
| 8 | Sex | Sex | McKinney, Melissa A | F = female, M = male | ||
| 9 | Age, comment | Comm | McKinney, Melissa A | |||
| 10 | Proteins, total | TPRT | µg/g | McKinney, Melissa A | Fluorescence microplate assay | microsomal yield (protein per tissue mass) |
| 11 | Proteins, total, standard deviation | TPRT std dev | ± | McKinney, Melissa A | Fluorescence microplate assay | |
| 12 | 7-ethoxyresorufin-O-deethylase, activity per protein mass | EROD/prot | pmol/min/mg | McKinney, Melissa A | Fluorescence microplate assay | |
| 13 | Standard deviation | Std dev | ± | McKinney, Melissa A | Fluorescence microplate assay | EROD activity |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
55 data points