Endothelin-1 and nitric oxide synthase in short rebound reaction to short exposure to inhaled nitric oxide
2001 (English)In: American Journal of Physiology. Heart and Circulatory Physiology, ISSN 0363-6135, E-ISSN 1522-1539, Vol. 281, H124-31 p.Article in journal (Refereed) Published
On withdrawal of inhalation of nitric oxide (INO) administered after lung injury, pulmonary artery pressure (PAP) and arterial oxygen tension (Pa(O(2))) may deteriorate more than before INO (rebound response). In this study, we investigated the possible roles of endothelin (ET)-1 and nitric oxide (NO) synthase (NOS) activity in the short rebound reaction to short-term inhalation of NO. Twenty-six anesthetized mechanically ventilated piglets were given endotoxin infusion. Twelve animals then received INO (30 parts per million) for two 30-min periods. Nine controls were not given NO. Measurements were made of blood gases and hemodynamic parameters, lung tissue ET-1 expression and NOS activity, and plasma ET-1 concentration. INO decreased PAP and increased Pa(O(2)), but INO withdrawal caused a short rebound reaction with an increase in PAP. Lung tissue expression and plasma concentration of ET-1 increased during INO, and plasma ET-1 increased further after its withdrawal. Activity of constitutive NOS decreased during INO, whereas that of inducible NOS was unchanged. Upregulation of ET-1 and downregulation of NOS activity may have influenced the short rebound reaction to short-term INO.
Place, publisher, year, edition, pages
2001. Vol. 281, H124-31 p.
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:uu:diva-54869PubMedID: 11406476OAI: oai:DiVA.org:uu-54869DiVA: diva2:82778