PMID- 10386828 OWN - NLM STAT- MEDLINE DCOM- 19990824 LR - 20190921 IS - 0892-0362 (Print) IS - 0892-0362 (Linking) VI - 21 IP - 3 DP - 1999 May-Jun TI - Effect of chronic prenatal ethanol exposure on nitric oxide synthase I and III proteins in the hippocampus of the near-term fetal guinea pig. PG - 251-9 AB - Chronic prenatal ethanol exposure suppresses nitric oxide synthase (NOS) enzymatic activity, in the hippocampus of the near-term fetal guinea pig at gestational day (GD) 62. The objective of this study was to determine if this decrease in NOS activity is the result of decreased NOS I and NOS III protein expression. Pregnant guinea pigs received oral administration of 4 g ethanol/kg maternal body weight/day (n = 8), isocaloric-sucrose/pair feeding (n = 8), or water (n = 8) from GD 2 to GD 61. The NOS I and NOS III protein expression and localization in the hippocampus were determined using Western blot analysis and immunohistochemistry, respectively. The chronic ethanol regimen produced fetal body, brain, and hippocampal growth restriction compared with the isocaloric-sucrose/pair fed and water groups but did not affect the expression or localization of NOS I and NOS III proteins in the hippocampus. The decrease in NOS enzymatic activity induced by chronic prenatal ethanol exposure may be the result of posttranslational modification of NOS I and/or NOS III protein in the hippocampus of the near-term fetal guinea pig. FAU - Kimura, K A AU - Kimura KA AD - Department of Pharmacology and Toxicology, Faculty of Health Sciences, Queen's University, Kingston, Ontario, Canada. FAU - Chiu, J AU - Chiu J FAU - Reynolds, J N AU - Reynolds JN FAU - Brien, J F AU - Brien JF LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Neurotoxicol Teratol JT - Neurotoxicology and teratology JID - 8709538 RN - 3K9958V90M (Ethanol) RN - 57-50-1 (Sucrose) RN - EC 1.14.13.39 (Nitric Oxide Synthase) RN - EC 1.14.13.39 (Nitric Oxide Synthase Type I) RN - EC 1.14.13.39 (Nitric Oxide Synthase Type III) SB - IM MH - Administration, Oral MH - Animals MH - Body Weight/drug effects MH - Brain/drug effects/embryology MH - Embryonic and Fetal Development MH - Ethanol/administration & dosage/blood/*toxicity MH - Female MH - Fetus/drug effects MH - Gene Expression Regulation, Developmental/*drug effects MH - Gene Expression Regulation, Enzymologic/drug effects MH - Gestational Age MH - Guinea Pigs MH - Hippocampus/drug effects/*embryology/*enzymology MH - Nitric Oxide Synthase/*genetics/metabolism MH - Nitric Oxide Synthase Type I MH - Nitric Oxide Synthase Type III MH - Pregnancy MH - *Prenatal Exposure Delayed Effects MH - Protein Processing, Post-Translational MH - Sucrose/pharmacology EDAT- 1999/07/01 00:00 MHDA- 1999/07/01 00:01 CRDT- 1999/07/01 00:00 PHST- 1999/07/01 00:00 [pubmed] PHST- 1999/07/01 00:01 [medline] PHST- 1999/07/01 00:00 [entrez] AID - S0892036298000555 [pii] AID - 10.1016/s0892-0362(98)00055-5 [doi] PST - ppublish SO - Neurotoxicol Teratol. 1999 May-Jun;21(3):251-9. doi: 10.1016/s0892-0362(98)00055-5.