Journal
CANCER LETTERS
Volume 317, Issue 1, Pages 49-55Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.canlet.2011.11.010
Keywords
Transplacental cancer; PAHs; T-cell lymphoma; Fetal; Maternal; Carcinogenesis
Categories
Funding
- PHS from NIH [P42 ES016465, P01 CA90890, T32ES07060, P30 ES03850]
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Dibenzo[def,p]chrysene (DBC) is a transplacental carcinogen in mice (15 mg/kg: gestation day (GD) 17). To mimic residual exposure throughout pregnancy, dams received four smaller doses of DBC (3.75 mg/kg) on GD 5, 9, 13 and 17. This regimen alleviated the previously established carcinogenic responses in the thymus, lung, and liver. However, there was a marked increase in ovarian tumors (females) and hyperplastic testes (males). [C-14]-DBC (GD 17) dosing revealed transplacental distribution to fetal tissues at 10-fold lower concentrations than in paired maternal tissue and residual [C-14] 3 weeks post-dose. This study highlights the importance of developmental stage in susceptibility to environmental carcinogens. (C) 2011 Elsevier Ireland Ltd. All rights reserved.
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