RGD Reference Report - In vivo reopening of the neonatal ductus arteriosus by a prostanoid EP4-receptor agonist in the rat. - Rat Genome Database

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In vivo reopening of the neonatal ductus arteriosus by a prostanoid EP4-receptor agonist in the rat.

Authors: Momma, K  Toyoshima, K  Takeuchi, D  Imamura, S  Nakanishi, T 
Citation: Momma K, etal., Prostaglandins Other Lipid Mediat. 2005 Dec;78(1-4):117-28. Epub 2005 Jun 8.
RGD ID: 10003042
Pubmed: (View Article at PubMed) PMID:16303610
DOI: Full-text: DOI:10.1016/j.prostaglandins.2005.04.006

Prostaglandin E1 is used to reopen the constricted ductus arteriosus in neonates with ductus-dependent circulation. To clarify possible prostanoid receptor agonists that can reopen the neonatal ductus with fewer side effects, we studied in vivo reopening of the neonatal ductus arteriosus by AE1-329, a prostanoid EP4-receptor agonist, in the rat. Neonatal rats were incubated at 33 degrees C. The inner diameter of the ductus was measured with a microscope and a micrometer following rapid whole-body freezing. Intraesophageal pressure was measured with a Millar micro-tip transducer. The ductus arteriosus constricted quickly after birth, and the inner diameter was 0.80 and 0.08 mm at 0 and 60 min after birth. PGE1 and AE1-329, injected subcutaneously at 60 min after birth, dilated the ductus dose-dependently. Thirty minutes after injection of 10 ng/g of PGE1 and AE1-329, the ductus diameter was 0.52 and 0.65 mm, respectively. The ductus-dilating effect of PGE1 was maximal at 15-30 min, and disappeared at 2 h. The ductus-dilating effect of AE1-329 was prolonged, the ductus was widely open at 6 h, and closed at 12 h after injection of 10 ng/g AE1-329. AE1-259-01 (EP2 agonist) (100 ng/g) did not dilate the neonatal ductus. Respiration was depressed by PGE1, but not by AE1-329. These results indicate the major role of EP4 in the neonatal ductus and that AE1-329, an EP4 agonist, can be used to dilate the neonatal constricted ductus without the side effects shown by EP3, including apnea.


Gene Ontology Annotations    

Biological Process

Objects Annotated

Genes (Rattus norvegicus)
Ptger4  (prostaglandin E receptor 4)

Additional Information