Keskil IS, Kemali Baykaner M, Aricioğlu A, Kaymaz M, Uysal SS, Ataoğlu OO, Balabanli B, Ercan S, Ceviker N. Effect of Iloprost on endothelin-1-induced free radical activation in rabbit brain stem.
Prostaglandins Leukot Essent Fatty Acids 2004;
71:7-11. [PMID:
15172678 DOI:
10.1016/j.plefa.2003.11.011]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2003] [Accepted: 11/19/2003] [Indexed: 11/17/2022]
Abstract
Iloprost, a stable analogue of prostacyclin, was used to reverse the early period of vasoconstriction provoked by Endothelin-1 by administering into the rabbit basilar artery. We observed if this produced an effect on the central nervous system parenchyma mediated by free radical system. The red neurons were counted in brain stem sections stained with haematoxylin and eosin, while superoxide dismutase and malondialdehyde levels were measured in brain stem tissue samples as a marker of reactive oxygen metabolites; both 30 and 90 min after administration of either Endothelin-1 (0.25 ng) alone or Endothelin-1 followed by Iloprost (0.5 microg/kg) into the basilar artery. Endothelin-1 significantly increased the number of red neurons, while Iloprost significantly reduced them after 30 and 90 min. However, regarding the reactive oxygen metabolites; a similar reversing effect of Iloprost was not observed although superoxide dismutase levels were significantly decreased after Endothelin-1 infusion.
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