Effect of lactational exposure to tributyltin chloride on innate immunodefenses in the F1 generation in mice.
We examined the effect of lactational exposure to tributyltin on innate immunodefenses in the F1 generation using in vivo and in vitro experiments. Pregnant C57BL/6 mice were given drinking water containing 0, 15, or 50 microg/ml of tributyltin chloride (TBTCl) from parturition to weaning. At weaning time, offspring were inoculated with Escherichia coli K-12, and bacterial clearances from the peritoneal cavity and spleen were examined. In vivo infection experiments indicated that bacterial clearance was significantly depressed in offspring breast-fed by dams exposed to 15 microg/ml of TBTCl (15 ppm F1), but not in offspring by dams exposed to 50 microg/ml of TBTCl (50 ppm F1). In vitro functional assays revealed that the killing activity of neutrophils decreased significantly in 15 ppm F1, but not in 50 ppm F1. We suggest that lactational exposure to TBT impairs innate immunodefenses in the F1 generation against non-pathogenic bacterial infection.
Department of Veterinary Science, Azabu University, Fuchinobe, Kanagawa, Japan.
Kimiko
K
Kimura
Kazuo
K
Kobayashi
Hiroyuki
H
Naito
Yoshihiko
Y
Suzuki
Yoshiko
Y
Sugita-Konishi
D000818:Animals; D000833:Animals, Suckling; D016207:Cytokines / Q000187:drug effects / Q000502:physiology; D004926:Escherichia coli / Q000302:isolation & purification; D004927:Escherichia coli Infections / Q000276:immunology; D005260:Female; D007113:Immunity, Innate / Q000187:drug effects*; D007774:Lactation; D008264:Macrophages / Q000187:drug effects / Q000502:physiology; D018811:Maternal Exposure; D051379:Mice; D008810:Mice, Inbred C57BL; D008892:Milk / Q000378:metabolism*; D009504:Neutrophils / Q000187:drug effects / Q000502:physiology; D010529:Peritoneal Cavity / Q000382:microbiology; D013154:Spleen / Q000382:microbiology; D014220:Trialkyltin Compounds / Q000378:metabolism / Q000633:toxicity*
D016207:Cytokines; D014220:Trialkyltin Compounds; C011559:tributyltin