Reproductive and developmental toxicity study of gadobenate dimeglumine formulation (E7155) (2) - Combined study of effects on fertility and embryo- fetal toxicity in female rats by intravenous administration

Abstract

The influence of gadobenate dimeglumine formulation (E7155) on fertility and general reproductive performance and embryo-fetal development was assessed in female Sprague-Dawley rats. E7155 was administered by intravenous injection at a dose of 0.3, 1.0 or 2.0 mmol/kg/day to groups of 22 female rats for 15 days before pairing. Treatment was continued throughout mating and up to Day 17 of gestation. Control animals received 0.9% sterile physiological saline throughout the same period. All females were killed on Day 20 of gestation for examination of their uterine contents. There were no toxic clinical signs of treatment. The body weight and food consumption of females before pairing and during gestation were not affected by treatment. Estrous cycles, mating performance, litter size and fetal weight, survival and development were also not affected by treatment. Based on the above results, the No Observed Adverse Effect Level (NOAEL) of E7155 was 2.0 mmol/kg/day for general toxicologic effects and reproduction of female rats and the development of their fetuses.