PMID- 16607633 OWN - NLM STAT- MEDLINE DCOM- 20060609 LR - 20121115 IS - 1542-9733 (Print) IS - 1542-9733 (Linking) VI - 77 IP - 2 DP - 2006 Apr TI - Inhibiting matrix metalloproteinases with prinomastat produces abnormalities in fetal growth and development in rats. PG - 95-103 AB - BACKGROUND: Matrix metalloproteinases (MMPs) play key roles in remodeling of the extracellular matrix during embryogenesis and fetal development. The objective of this study was to determine the effects of prinomastat, a potent selective MMP inhibitor, on fetal growth and development. METHODS: Prinomastat (25, 100, 250 mg/kg/day, p.o.) was administered to pregnant female Sprague-Dawley rats on gestational days (GD) 6-17. A Cesarian section was carried out on GD 20 and the fetuses were evaluated for viability and skeletal and soft tissue abnormalities. RESULTS: Prinomastat treatment at the 250 mg/kg/day dose produced a decrease in body weight and food consumption in the dams. A dose-dependent increase in post-implantation loss was observed in the 100 and 250 mg/kg/day-dose groups, resulting in only 22% of the dams having viable litters for evaluation at the 250 mg/kg/day dose. Fetal skeletal tissue variations and malformations were present in all prinomastat treated groups and their frequency increased with dose. Variations and malformation in fetal soft tissue were also increased at the 100 and 250 mg/kg/day doses. Prinomastat also interfered with fetal growth of rat embryo cultures in vitro. CONCLUSIONS: These data confirm that MMP inhibition has a profound effect on fetal growth and development in vivo and in vitro. CI - Birth Defects Research (Part B) 77:95-103, 2006. (c) 2006 Wiley-Liss, Inc. FAU - Younis, Husam S AU - Younis HS AD - Worldwide Safety Sciences, Pfizer Global Research and Development, La Jolla Laboratories, San Diego, California 92121, USA. husam.younis@pfizer.com FAU - Jessen, Bart A AU - Jessen BA FAU - Wu, Ellen Y AU - Wu EY FAU - Stevens, Gregory J AU - Stevens GJ LA - eng PT - Journal Article PL - United States TA - Birth Defects Res B Dev Reprod Toxicol JT - Birth defects research. Part B, Developmental and reproductive toxicology JID - 101155115 RN - 0 (Enzyme Inhibitors) RN - 0 (Matrix Metalloproteinase Inhibitors) RN - 0 (Organic Chemicals) RN - 10T6626FRK (prinomastat) SB - IM MH - Animals MH - Body Weight/drug effects MH - Bone and Bones/abnormalities MH - Eating/drug effects MH - Embryo Culture Techniques MH - Embryo Loss/chemically induced MH - Embryo, Mammalian/abnormalities/drug effects MH - Enzyme Inhibitors/pharmacokinetics/*toxicity MH - Female MH - Fetus/*abnormalities/drug effects/enzymology MH - *Matrix Metalloproteinase Inhibitors MH - Organ Size/drug effects MH - Organic Chemicals/pharmacokinetics/*toxicity MH - Pregnancy MH - Rats MH - Rats, Sprague-Dawley MH - Uterus/anatomy & histology/drug effects EDAT- 2006/04/12 09:00 MHDA- 2006/06/10 09:00 CRDT- 2006/04/12 09:00 PHST- 2006/04/12 09:00 [pubmed] PHST- 2006/06/10 09:00 [medline] PHST- 2006/04/12 09:00 [entrez] AID - 10.1002/bdrb.20073 [doi] PST - ppublish SO - Birth Defects Res B Dev Reprod Toxicol. 2006 Apr;77(2):95-103. doi: 10.1002/bdrb.20073.