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© 1986 Oxford University Press

research-article

Teratology and Multigeneration Reproduction Studies with Maleic Anhydride in Rats1

ROBERT D. SHORT*, FREDERICK R. JOHANNSEN*, GEORGE J. LEVINSKAS*, DEAN E. RODWELL{dagger},2 and JAMES L. SCHARDEIN{dagger}

*Monsanto Company 800 N. Lindbergh Boulevard, St. Louis, Missouri 63167 {dagger}International Research and Development Corporation Mattawan, Michigan 49071

Teratology and Multigeneration Reproduction Studies with Maleic Anhydride in Rats. SHORT, R.D., JOHANNSEN, F.R., LEVINSKAS, G.J., RODWELL, D.E., AND SCHARDEIN, J.L. (1986). Fundam. Appi Toxicol. 7, 359-366. These studies were initiated to evaluate the effects of maleic anhydride on development and reproduction in CD rats. In the teratology study, pregnant rats (19-23/group) received 0, 30, 90, or 140 mg/kg/day maleic anhydride in corn oil orally from Days 6-15 of gestation and fetuses were examined for gross soft tissue and skeletal defects. A reduced weight gain or weight loss was observed in all maleic anhydride-treated groups between Days 6 and 9; however, mean weights of all groups were within 5% of control on Days 15 and 20. No treatment-related effects on fetal development were observed. In the multigeneration study, rats (10 males and 20 females/group) received 0, 20, 55, or 150 mg/kg/day maleic anhydride in corn oil orally and were mated to produce two generations, each with two litters. Groups of the same size from the second litter were used for subsequent generations and were given the same dose of maleic anhydride as were their parents. The high-dose group was terminated during the second generation due to treatment-related mortality in adults. Renal cortical necrosis occurred in high-dose Fo males and females. Increased kidney weights were observed in low- and mid-dose adult Fl females. No treatment-related effects on reproduction were observed with maleic anhydride at doses up to 55 mg/kg/day over two generations.


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