Developmental toxicity of amesergide administered by gavage to CD rats and New Zealand white rabbits.
Amesergide is a selective serotonin 5-HTIC/2 receptor antagonist being developed for the treatment of depression. The potential developmental toxicity of amesergide was evaluated in CD rats and New Zealand white rabbits. Pregnant rats and rabbits were dosed once daily by gavage on Gestation Days 6-17 and 6-18, respectively. Doses for rats were 0, 3, 10, and 30 mg/kg; doses for rabbits and 0, 0.2, 2, and 15 mg/kg. Cesarean sections were performed on rats and rabbits on Gestation Days 20 and 28, respectively. In rats, maternal effects expressed as depression of body weight gain and food consumption were observed at the 30 mg/kg dose level. Fetal viability and morphology were not affected at any dose level. Fetal weight was depressed at the 30 mg/kg dose level. The no-observed-effect level (NOEL) in the rat was 10 mg/kg. In rabbits, maternal effects expressed as a decrease in food consumption occurred at the 2 and 15 mg/kg dose levels; weight gain was depressed at 15 mg/kg. Fetal viability, weight, and morphology were not affected at any dose level. The NOELs for maternal and developmental effects in the rabbit were 0.2 and 15 mg/kg, respectively.
Toxicology Research Laboratories, Lilly Research Laboratories, Division of Eli Lilly and Company, Greenfield, Indiana 46140, USA.
S L
SL
Kelich
P L
PL
Meade
D E
DE
Seyler
D000014:Abnormalities, Drug-Induced / Q000473:pathology; D000818:Animals; D004435:Eating / Q000187:drug effects; D004873:Ergolines / Q000008:administration & dosage / Q000633:toxicity*; D005260:Female; D005328:Fetal Viability / Q000187:drug effects; D005333:Fetus / Q000473:pathology; D007441:Intubation, Gastrointestinal; D011247:Pregnancy; D011817:Rabbits; D051381:Rats; D017207:Rats, Sprague-Dawley; D012702:Serotonin Antagonists / Q000008:administration & dosage / Q000633:toxicity*; D013723:Teratogens / Q000633:toxicity*; D014599:Uterus / Q000473:pathology; D015430:Weight Gain / Q000187:drug effects
D004873:Ergolines; D012702:Serotonin Antagonists; D013723:Teratogens; C066736:amesergide