title: Distribution of tributyltin, dibutyltin and monobutyltin in the liver, brain and fat of rats: two-generation toxicity study of tributyltin chloride.
abstract: The distribution of tributyltin (TBT) and its metabolites, dibutyltin (DBT) and monobutyltin (MBT), was examined in the liver, brain and fat tissues in a two-generation reproductive toxicity study of tributyltin chloride (TBTCl) in rats using dietary supplementation at concentrations of 5, 25 and 125 ppm. In the liver, irrespective of TBTCl dietary concentration, gender or generation, the highest concentration of metabolite was consistently MBT, followed by DBT, and then TBT. In contrast, TBT was consistently present at the highest concentration in the brain, nearly always followed by DBT and MBT. In fat tissues, the concentrations of the three butyltin compounds showed similar relationships to those observed in the brain, although the concentrations were much lower. In the liver, the concentration of TBT was higher in females, and those of DBT and MBT were higher in males. Factorial ANOVA also suggested the effect of gender on the concentrations of the three butyltin compounds in the liver. The results of this study suggest tissue-dependent distribution of TBT, DBT and MBT and gender-dependent distribution of the three metabolites in the liver of rats.
authors.affiliation: Department of Hygiene, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan. momura@eisei.med.kyushu-u.ac.jp
authors.forename: Minoru
authors.initials: M
authors.lastname: Omura
authors.forename: Youhei
authors.initials: Y
authors.lastname: Shimasaki
authors.forename: Yuji
authors.initials: Y
authors.lastname: Oshima
authors.forename: Kei
authors.initials: K
authors.lastname: Nakayama
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Kubo
authors.forename: Shuji
authors.initials: S
authors.lastname: Aou
authors.forename: Rika
authors.initials: R
authors.lastname: Ogata
authors.forename: Miyuki
authors.initials: M
authors.lastname: Hirata
authors.forename: Naohide
authors.initials: N
authors.lastname: Inoue
mesh_terms: D000273:Adipose Tissue / Q000378:metabolism*; D000704:Analysis of Variance; D000818:Animals; D001921:Brain / Q000378:metabolism*; D005260:Female; D008099:Liver / Q000378:metabolism*; D008297:Male; D009947:Organotin Compounds / Q000378:metabolism*; D051381:Rats; D017208:Rats, Wistar; D012737:Sex Factors; D014220:Trialkyltin Compounds / Q000493:pharmacokinetics* / Q000633:toxicity
chemical_list: D009947:Organotin Compounds; D014220:Trialkyltin Compounds; C056189:di-n-butyltin; C062120:n-butyltin; C011559:tributyltin