© 1991 Oxford University Press
research-article |
Difference in the Developmental Toxicity of Ethylenethiourea and Three N,N'-Substituted Thiourea Derivatives in Rats
Institut Ndional de Recherche et de Sécurité 54501 Vandoeuvre, France
Received October 12, 1990; accepted March 29, 1991
Difference in the Developmental Toxicity of Ethylenethiourea and Thm N,N'-Substituted Thiourea Derivatives in Rats. SAILLENFAIT, A. M., SABATE, J. P., LANGONNE, I., AND DE CUURRIG J. (1991). Fundam. Appl Toxicol 17, 399408. Sprague-Dawley rats were administered ethylenethiourea (ETU), 1,3-dimethyl-2-thiourea (DMT), 1,3-dibutyl-2-thiourea (DBT), or 1,3-diphenyl-2-thiourea (DPT) by gavage from Days 6 to 20 of gestation. Daily dosage levels (mg/kg/day) were ETU at 0, 15, 25 and 35; DMT at 0, 15, 25, 50, 100, and 200; DBT at 0, 15,25, 50, 100, and 200; and DPT at 0,25, 50, 100, and 200. There was evidence of maternal toxlcity at all doses of DMT and at doses
50 mg DBT/kg/day. DPT was embryolethal at 200 mg/kg/day. Fetotoxicity was observed at doses
15 mg DMT/kg/day,
15 mg DBT/kg/day, and
100 mg DPT/kg/day. ETU was the only chemical tested that proved to be teratogenic.