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Enantioselective disposition of PCB 136 (2,2′,3,3′,6,6′‐hexachlorobiphenyl) in C57BL/6 mice after oral and intraperitoneal administration
Author(s) -
KaniaKorwel Izabela,
Shaikh Nadim S.,
Hornbuckle Keri C.,
Robertson Larry W.,
Lehmler HansJoachim
Publication year - 2006
Publication title -
chirality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.43
H-Index - 77
eISSN - 1520-636X
pISSN - 0899-0042
DOI - 10.1002/chir.20342
Subject(s) - chemistry , intraperitoneal injection , oral administration , enantiomer , enantioselective synthesis , pharmacology , disposition , xenobiotic , polychlorinated biphenyl , route of administration , stereochemistry , biochemistry , organic chemistry , medicine , enzyme , psychology , social psychology , catalysis
Studies of xenobiotic disposition in rodents often employ experimental designs using differing routes of administration. In an effort to investigate the effects of route of administration on enantioselective disposition of xenobiotics, a chiral polychlorinated biphenyl (PCB), racemic PCB 136, was administered as a single dose (50 mg/kg body weight) to male or female C57BL/6 mice either orally or via intraperitoneal injection. Mice were sacrificed after either 3 or 6 days, and blood and organs were collected for PCB analysis. Intraperitoneal injection of PCB 136 produced statistically higher PCB levels in blood and organs than did the oral administration. Tissue levels were higher after 3 days than those after 6 days. Enantioselective analysis showed that (+)‐PCB 136 was enriched in most organs, with the most pronounced enrichment found in the liver and the brain of animals dosed orally or by intraperitoneal injection, respectively. Significantly higher retained enantiomeric fractions of PCB 136 were found in the oral treatment groups compared with those found in intraperitoneal treatment groups, possibly as a result of the lower PCB levels in oral treatment groups. Therefore, the choice of administration route may well have implications for the enantioselective disposition of PCB 136 and other chiral substances. Chirality, 2006. © 2006 Wiley‐Liss, Inc.