Contamination status and accumulation features of persistent organochlorines in pet dogs and cats from Japan.
Concentrations of persistent organochlorines (OCs) such as polychlorinated dibenzo-p-dioxin (PCDDs), dibenzofurans (PCDFs), biphenyls, dichlorodiphenyltrichloroethane and their metabolites (DDTs), hexachlorocyclohexane isomers, hexachlorobenzene, and chlordane compounds were determined in genital organs of pet dogs and cats and pet foods from Japan. Levels of OCs in dogs were relatively lower than those in cats, while residue levels in their diets were almost similar, implying that accumulation and elimination mechanisms of these contaminants are different between dogs and cats. When bioconcentration factors (BCFs) were estimated from concentrations of OCs in dogs, cats, and their diets, BCFs of all the OCs except PCDD/DFs exceeded 1.0 in cats. On the other hand, in all the dogs, BCFs of DDTs were below 1.0, suggesting that dogs do not bioconcentrate DDTs. Furthermore, BCFs of all the OCs except PCDD/DFs in dogs were notably lower than those in cats, suggesting that dogs have higher metabolic and elimination capacity for these contaminants than cats. When residue levels of OCs in livers, adipose tissue, and genital organs of two pet dogs were examined, hepatic sequestration of PCDD/DFs and oxychlordane was observed.
Kunisue
Tatsuya
T
Center for Marine Environmental Studies, Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577, Japan.
Nakanishi
Shigeyuki
S
Watanabe
Mafumi
M
Abe
Takao
T
Nakatsu
Susumu
S
Kawauchi
Sakio
S
Sano
Akihiko
A
Horii
Akira
A
Kano
Yasumasa
Y
Tanabe
Shinsuke
S
D000273:Adipose Tissue / Q000737:chemistry; D000821:Animal Feed / Q000032:analysis; D000818:Animals; D000829:Animals, Domestic / Q000378:metabolism*; D001711:Biotransformation; D002415:Cats / Q000378:metabolism*; D004285:Dogs / Q000378:metabolism*; D004785:Environmental Pollutants / Q000032:analysis / Q000493:pharmacokinetics*; D005835:Genitalia / Q000737:chemistry; D006843:Hydrocarbons, Chlorinated / Q000032:analysis / Q000493:pharmacokinetics*; D007564:Japan; D008099:Liver / Q000737:chemistry
D004785:Environmental Pollutants; D006843:Hydrocarbons, Chlorinated