Formation and role of plasma S-nitrosothiols in liver ischemia-reperfusion injury
Φόρτωση...
Ημερομηνία
Συγγραφείς
Glantzounis, G. K.
Rocks, S. A.
Sheth, H.
Knight, I.
Salacinski, H. J.
Davidson, B. R.
Winyard, P. G.
Seifalian, A. M.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer-reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Free Radic Biol Med
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
Plasma S-nitrosothiols (RSNOs) may act as a circulating form of nitric oxide that affects vascular function and platelet aggregation. Their role in liver ischemia/reperfusion (I/R) injury is largely unknown. The aim of the present study was to investigate the changes in plasma RSNOs following liver I/R injury. Two groups of New Zealand white rabbits were used (n=6, each): the I/R group underwent 60 min lobar liver ischemia and 7 h reperfusion, while the sham group underwent laparotomy but no liver ischemia. Serial RSNO levels were measured in plasma by electron paramagnetic resonance (EPR) spectrometry, nitrite/nitrates by capillary electrophoresis, hepatic microcirculation by laser Doppler flowmetry, redox state of hepatic cytochrome oxidase by near-infrared spectroscopy, liver iNOS mRNA expression by reverse transcription-polymerase chain reaction (RT-PCR) and the oxidation of dihydrorhodamine to rhodamine by fluorescence. The effect of the antioxidant N-acetylcysteine (NAC) on RSNOs formation and DHR oxidation was tested in a third group of animals (n=6) undergoing lobar liver I/R. Hepatic I/R was associated with a significant increase in plasma RSNOs, plasma nitrites, hepatic iNOS mRNA expression, impairment in hepatic microcirculation, decrease in the redox state of cytochrome oxidase, and significant production of rhodamine. The changes were more obvious during the late phase of reperfusion (>4 h). NAC administration decreased plasma RSNOs and oxidation of DHR to RH (P<0.05, 5 and 7 h postreperfusion, respectively). These results suggest that significant upregulation of nitric oxide synthesis during the late phase of reperfusion is associated with impairment in microcirculation and mitochondrial dysfunction. Plasma S-nitrosothiols are a good marker of this nitric oxide-mediated hepatotoxicity.
Περιγραφή
Λέξεις-κλειδιά
Acetylcysteine/metabolism, Animals, Electron Spin Resonance Spectroscopy, Electron Transport Complex IV/metabolism, Electrophoresis, Capillary, Liver/metabolism/*pathology, Nitrates/metabolism, Nitric Oxide/metabolism, Nitric Oxide Synthase Type II/metabolism, Nitrites/metabolism, RNA, Messenger/metabolism, Rabbits, Reactive Nitrogen Species, *Reperfusion Injury, S-Nitrosothiols/*blood
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
http://www.ncbi.nlm.nih.gov/pubmed/17320770
http://ac.els-cdn.com/S0891584906008136/1-s2.0-S0891584906008136-main.pdf?_tid=2319cd3724dd2b524fdc0a345911a2d8&acdnat=1333626331_5caa161c64f187fdafcfba039f920ca5
http://ac.els-cdn.com/S0891584906008136/1-s2.0-S0891584906008136-main.pdf?_tid=2319cd3724dd2b524fdc0a345911a2d8&acdnat=1333626331_5caa161c64f187fdafcfba039f920ca5
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών Υγείας. Τμήμα Ιατρικής