Effect of prostaglandin E2 on the ductus arteriosus in the newborn rat: an ultrastructural study

Title:

Effect of prostaglandin E2 on the ductus arteriosus in the newborn rat: an ultrastructural study

Creator:

Jarkovská, D., Janatová, T., Hruda, J., Ošťádal, B., and Šamánek, M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:1c276f6e-283b-4789-bd46-5aae842c8bc2
uuid:1c276f6e-283b-4789-bd46-5aae842c8bc2

Subject:

ductus arteriosus, prostaglandins, cardiac development, and rat heart

Type:

article, model:article, and TEXT

Description:

A patent ductus arteriosus (DA) was maintained in newborn rats (Wistar strain) by administering prostaglandin E2 (PG E2) in doses of 15 /ig.kg'1 at 30 min intervals up to 300 min after birth. In the control animals, the DA was functionally closed 300 min after birth. The lumen was blocked by clustered endothelial cells at various stages of degeneration. Elastic membranes of the media had disintegrated into irregular fragments and the smooth muscle cells were contracted. Cytoplasm excrescences formed on their surface as a result of contraction protruded as hernias into adjacent muscle cells and into endothelial cells. The smooth muscle cells degenerated. The administration of PG E2 inhibited contraction of the smooth muscle cells and so also the development of degenerative changes; 300 min after birth the DA was fully patent, the elastic membranes were structurally intact, regularly organized and continuous. The smooth muscle cells had the character of synthesizing cells with richly developed granular endoplasmic reticulum. The intima and its endothelial lining were likewise free from structural changes. The ultrastructural image of the wall of the DA correspondent to the state 10 min after birth, when the DA was fully patent. The administration of PG E2 did not induce any ultrastructural changes indicative of injury to the wall of the DA.

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 1992 Volume:41 | Number:4

Harvested from:

CDK

Metadata only:

false