title: Tissue concentrations of polybrominated compounds in Chinese sturgeon (Acipenser sinensis): origin, hepatic sequestration, and maternal transfer.
abstract: Information on concentrations of polybrominated compounds in various tissues of wild fish is limited. Concentrations of polybrominated diphenyl ethers (PBDEs), methoxylated PBDEs (MeO-PBDEs), and hydroxylated PBDEs (OH-PBDEs) were measured in 12 organs and eggs of 17 female Chinese sturgeon (Acipenser sinensis). The highest concentrations of PBDEs (42.8+/-39.4 ng/g ww), and MeO-PBDEs (135+/-63.6 pg/g ww) occurred in adipose followed by liver (PBDEs: 25.0+/-27.0 ng/g ww, MeO-PBDEs: 32.3+/-29.1 pg/g ww) and eggs (PBDEs: 21.2+/-19.4 ng/g ww, MeO-PBDEs: 120+/-119 pg/g ww), and the highest concentration of OH-PBDEs was observed in liver (185+/-174 pg/g ww) and eggs (178+/-294 pg/g ww). The lack of in vitro transformation of 6-MeO-BDE47 or BDE47 by microsomes prepared from Chinese sturgeon liver suggests that most 6-OH-BDE47 was directly accumulated as a natural product. Lipid-normalization revealed preferential accumulation of PBDEs in liver, and ratios of concentrations between eggs and liver were 0.10+/-0.11 to 0.22+/-0.26, which was lower than that for MeO-PBDEs (6-MeO-BDE47: 0.57+/-0.60, 2'-MeO-BDE68: 0.65+/-0.85) and 6-OH-BDE47 (0.59+/-0.51). Concentrations of PBDEs were negatively correlated with age, but no significant relationships between concentrations of OH-PBDEs or MeO-PBDEs and age were observed.
authors.affiliation: Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Zhang
authors.forename: Yi
authors.initials: Y
authors.lastname: Wan
authors.forename: John P
authors.initials: JP
authors.lastname: Giesy
authors.forename: Michael H W
authors.initials: MH
authors.lastname: Lam
authors.forename: Steve
authors.initials: S
authors.lastname: Wiseman
authors.forename: Paul D
authors.initials: PD
authors.lastname: Jones
authors.forename: Jianying
authors.initials: J
authors.lastname: Hu
mesh_terms: D000818:Animals; D004784:Environmental Monitoring; D005260:Female; D005399:Fishes / Q000378:metabolism*; D055768:Halogenated Diphenyl Ethers / Q000378:metabolism*; D008099:Liver / Q000378:metabolism*; D008297:Male; D018811:Maternal Exposure; D010063:Ovum / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D055768:Halogenated Diphenyl Ethers; D014874:Water Pollutants, Chemical