PMID- 25892359 OWN - NLM STAT- MEDLINE DCOM- 20160331 LR - 20181202 IS - 1552-8618 (Electronic) IS - 0730-7268 (Linking) VI - 34 IP - 9 DP - 2015 Sep TI - Using cytochrome P4501A1 expression in liver and blubber to understand effects of persistent organic pollutant exposure in stranded Pacific Island cetaceans. PG - 1989-95 LID - 10.1002/etc.3018 [doi] AB - Elevated levels of persistent organic pollutants (POPs) have been reported in tropical Pacific Island cetaceans and their environment. In addition, recent health concerns in cetacean populations have warranted investigation into potential physiological effects from POP exposure for this region. Cytochrome P450 1A1 (CYP1A1) is a candidate for examining such effects. This well-studied biomarker of exposure and effect was examined in stranded cetacean liver using immunoblot (n = 39, 16 species) and blubber using immunohistochemistry (n = 23, 10 species). Paired tissue samples allowed for CYP1A1 comparisons not only between species but also within each individual animal to examine differences between tissue types. Liver CYP1A1 expression correlated positively and significantly with blubber concentrations of all POP categories (n = 39, p < 0.050) except octachlorostyrene and pentachlorobenzene (p > 0.100). Among Stenella species, liver CYP1A1 tissue expression was correlated negatively with the sum of all blubber layer endothelial cell CYP1A1 expression (n = 14, p = 0.049). Overall, elevated expression of liver CYP1A1 confirms its use as a biomarker of POP exposure to cetaceans stranded in the tropical Pacific basin. CI - (c) 2015 SETAC. FAU - Bachman, Melannie J AU - Bachman MJ AD - Department of Natural Sciences, Hawaii Pacific University, Kaneohe, Hawaii, USA. AD - Hollings Marine Laboratory, Chemical Sciences Division, National Institute of Standards and Technology, Charleston, South Carolina, USA. FAU - Foltz, Kerry M AU - Foltz KM AD - Department of Natural Sciences, Hawaii Pacific University, Kaneohe, Hawaii, USA. FAU - Lynch, Jennifer M AU - Lynch JM AD - Hollings Marine Laboratory, Chemical Sciences Division, National Institute of Standards and Technology, Charleston, South Carolina, USA. FAU - West, Kristi L AU - West KL AD - Department of Natural Sciences, Hawaii Pacific University, Kaneohe, Hawaii, USA. FAU - Jensen, Brenda A AU - Jensen BA AD - Department of Natural Sciences, Hawaii Pacific University, Kaneohe, Hawaii, USA. LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20150622 PL - United States TA - Environ Toxicol Chem JT - Environmental toxicology and chemistry JID - 8308958 RN - 0 (Organic Chemicals) RN - 0 (Water Pollutants, Chemical) RN - EC 1.14.14.1 (Cytochrome P-450 CYP1A1) SB - IM MH - Adipose Tissue/drug effects/*metabolism MH - Animals MH - Cetacea/*metabolism MH - Cytochrome P-450 CYP1A1/*metabolism MH - Immunoblotting MH - Immunohistochemistry MH - Liver/drug effects/*metabolism MH - Organic Chemicals/chemistry/*toxicity MH - Pacific Islands MH - Up-Regulation/*drug effects MH - Water Pollutants, Chemical/chemistry/*toxicity OTO - NOTNLM OT - Biomarker OT - Cetaceans OT - Cytochrome P450 OT - Hawaii OT - Persistent organic pollutants EDAT- 2015/04/22 06:00 MHDA- 2016/04/01 06:00 CRDT- 2015/04/21 06:00 PHST- 2014/10/31 00:00 [received] PHST- 2014/12/19 00:00 [revised] PHST- 2015/04/05 00:00 [accepted] PHST- 2015/04/21 06:00 [entrez] PHST- 2015/04/22 06:00 [pubmed] PHST- 2016/04/01 06:00 [medline] AID - 10.1002/etc.3018 [doi] PST - ppublish SO - Environ Toxicol Chem. 2015 Sep;34(9):1989-95. doi: 10.1002/etc.3018. Epub 2015 Jun 22.