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dc.contributor.authorNuutinen, Susannaen_US
dc.contributor.authorLandrum, Peter F.en_US
dc.contributor.authorSchuler, Lance J.en_US
dc.contributor.authorKukkonen, Jussi V. K.en_US
dc.contributor.authorLydy, Michael J.en_US
dc.identifier.citationArchives of environmental contamination and toxicology. 2003 May; 44(4): 467-75.en_US
dc.descriptionClick on the DOI link below to access the article (may not be free).en_US
dc.description.abstractUptake, biotransformation, and elimination rates were determined for pentachlorophenol (PCP), methyl parathion (MP), fluoranthene (FU), and 2,2',4,4',5,5'-hexachlorobiphenyl (HCBP) using juvenile Hyalella azteca under water-only exposures. A two-compartment model that included biotransformation described the kinetics for each chemical. The uptake clearance coefficients (k(u)) were 25.7 +/- 2.9, 11.5 +/- 1.1, 184.4 +/- 9.3, and 251.7 +/- 9.0 (ml g(-1) h(-1)) for PCP, MP, FU, and HCBP, respectively. The elimination rate constant of the parent compound (k(ep)) for MP was almost an order of magnitude faster (0.403 +/- 0.070 h(-1)) than for PCP and FU (0.061 +/- 0.034 and 0.040 +/- 0.008 h(-1)). The elimination rate constants for FU and PCP metabolites (k(em)) were similar to the parent compound elimination 0.040 +/- 0.005 h(-1) and 0.076 +/- 0.012 h(-1), respectively. For MP, the metabolites were excreted much more slowly than the parent compound (0.021 +/- 0.001 h(-1)). For PCP, FU, and MP whose metabolites were measured, the biological half-life (t(1/2p)) of the parent compound was shorter than the half-life for metabolites (t(1/2m)) because the rate is driven both by elimination and biotransformation processes. Thus, H. azteca is capable of metabolizing compounds with varying chemical structures and modes of toxic action, which may complicate interpretation of toxicity and bioaccumulation results. This finding improves our understanding of H. azteca as a test organism, because most biomonitoring activities do not account for biotransformation and some metabolites can contribute significantly to the noted toxicity.en_US
dc.publisherSpringer New Yorken_US
dc.relation.ispartofseriesArchives of environmental contamination and toxicologyen_US
dc.subjectResearch Support, U.S. Gov't, Non-P.H.S.en_US
dc.subject.meshCrustacea/drug effectsen_US
dc.subject.meshEnvironmental Monitoring/methodsen_US
dc.subject.meshMethyl Parathion/pharmacokineticsen_US
dc.subject.meshModels, Biologicalen_US
dc.subject.meshPolychlorinated Biphenyls/pharmacokineticsen_US
dc.subject.meshWater Pollutants, Chemical/pharmacokineticsen_US
dc.subject.meshEnvironmental Monitoring/standardsen_US
dc.subject.meshMethyl Parathion/toxicityen_US
dc.subject.meshPolychlorinated Biphenyls/toxicityen_US
dc.subject.meshWater Pollutants, Chemical/toxicityen_US
dc.titleToxicokinetics of organic contaminants in Hyalella aztecaen_US
dc.description.versionpeer revieweden_US
dc.rights.holderCopyright © 2003, Springer New Yorken_US

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