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- Title
Dose-Dependent Effects of Meloxicam Administration on Cyclooxygenase-1 and Cyclooxygenase-2 Protein Expression in Intrauterine Tissues and Fetal Tissues of a Sheep Model of Preterm Labor.
- Authors
Rac, Valeria E.; Scott, Catherine A.; Small, Charlene; Adamson, S. Lee; Rurak, Dan; Challis, John R.; Lye, Stephen J.
- Abstract
Meloxicam (MEL), a cyclooxygenase (COX)-2 inhibitor, decreases prostaglandin production arm blocks preterm labor in sheep. The objective of this study is to investigate MEL dosage regimens on COX-1, COX-2, and prostaglandin dehydrogenase (PGDH) expression in ovine intrauterine and fetal tissues. Animals in preterm labor received maternal infusions of saline or MEL at maintained high or graded doses (study 1) or acute graded doses (study 2). MEL blocked preterm labor. In study 1, MEL decreased COX- 2 expression in the endometrium, myometrium, and amnion but not placenta or fetal tissues. In study 2, COX-2 expression was unchanged. COX-1/PGDH expression was unaffected. While MEL is an effective tocolytic, reductions in COX-2 protein occurred only with maintained MEL exposure. MEL effects are tissue specific and do not affect COX-1 or PGDH expression. Maternal MEL does not affect fetal COX expression in the sheep, possibly contributing to its lack of fetal side effects.
- Subjects
CYCLOOXYGENASE 2 inhibitors; PROSTAGLANDINS; PREMATURE labor; SHEEP as laboratory animals; FETAL tissues
- Publication
Reproductive Sciences, 2007, Vol 14, Issue 8, p750
- ISSN
1933-7191
- Publication type
Article
- DOI
10.1177/1933719107309042