PMID- 3149039 OWN - NLM STAT- MEDLINE DCOM- 19890501 LR - 20131121 IS - 0040-3709 (Print) IS - 0040-3709 (Linking) VI - 38 IP - 4 DP - 1988 Oct TI - Valproic acid developmental toxicity and pharmacokinetics in the rhesus monkey: an interspecies comparison. PG - 329-45 AB - This study was undertaken to assess the developmental toxicity and drug distributional and metabolic characteristics of prenatal valproic acid (VPA) exposure in rhesus monkeys. Oral administration of 20-600 mg/kg/day VPA (approximately 1-15 X human therapeutic dose) to 33 animals on variable gestational days (GD) during organogenesis resulted in dose-dependent developmental toxicity manifested as increased embryo/fetal mortality, intrauterine growth retardation, and craniofacial and skeletal defects. Biphasic plasma elimination curves were observed for total and free VPA on the first (GD 21) and last (GD 50) days of treatment in the 100- and 200-mg/kg/day dose groups. VPA exhibited dose-independent elimination kinetics at the plasma concentrations observed in this study. There was no significant change in pharmacokinetic parameters (maternal plasma elimination rate, area under the curve, peak plasma concentration) between the first and last days of treatment at either dose level. Placental transfer studies indicated that embryos were exposed to half the free VPA concentrations present in maternal plasma on GD 37. Comparisons of interspecies sensitivity to VPA-induced developmental toxicity in the mouse, rat, monkey, and man are made. FAU - Hendrickx, A G AU - Hendrickx AG AD - California Primate Research Center, University of California, Davis 95616. FAU - Nau, H AU - Nau H FAU - Binkerd, P AU - Binkerd P FAU - Rowland, J M AU - Rowland JM FAU - Rowland, J R AU - Rowland JR FAU - Cukierski, M J AU - Cukierski MJ FAU - Cukierski, M A AU - Cukierski MA LA - eng GR - RR00169/RR/NCRR NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Teratology JT - Teratology JID - 0153257 RN - 0 (Blood Proteins) RN - 0 (Teratogens) RN - 614OI1Z5WI (Valproic Acid) SB - IM MH - *Abnormalities, Drug-Induced MH - Animals MH - Blood Proteins/metabolism MH - Female MH - Fetus/*drug effects MH - Macaca/*metabolism MH - Macaca mulatta/*metabolism MH - Protein Binding MH - Species Specificity MH - *Teratogens MH - Valproic Acid/blood/pharmacokinetics/*toxicity EDAT- 1988/10/01 00:00 MHDA- 1988/10/01 00:01 CRDT- 1988/10/01 00:00 PHST- 1988/10/01 00:00 [pubmed] PHST- 1988/10/01 00:01 [medline] PHST- 1988/10/01 00:00 [entrez] AID - 10.1002/tera.1420380405 [doi] PST - ppublish SO - Teratology. 1988 Oct;38(4):329-45. doi: 10.1002/tera.1420380405.