title: Effects of selective cyclooxygenase inhibitors on ischemia/reperfusion-induced hepatic microcirculatory dysfunction in mice.
abstract: We examined the effects of selective cyclooxygenase (COX) inhibition on hepatic warm ischemia/reperfusion (I/R) injury in mice. A selective COX-1 inhibitor, SC-560, selective COX-2 inhibitors, NS-398 and celecoxib, and indomethacin were administered 30 min before ischemia. Four hours after reperfusion, an in vivo microscopic study showed that I/R caused significant accumulation of leukocytes adhering to the hepatic microvessels and nonperfused sinusoids. Levels of plasma alanine transaminase (ALT) and tumor necrosis factor (TNF)-alpha also showed increases. SC-560, NS-398, celecoxib and indomethacin significantly reduced hepatic responses to I/R including microcirculatory dysfunction and release of ALT and TNF-alpha. Moreover, the effects of the thromboxane (TX) A(2) (TXA(2)) synthase inhibitor OKY-046 and the TXA(2) receptor antagonist S-1452 on hepatic responses to I/R exhibited results similar to those obtained with COX inhibitors. These results suggest that COX-1 and COX-2 contribute to I/R-induced hepatic microvascular and hepatocellular injury partly through TNF-alpha production, and that TXs derived from COX are partly responsible for I/R-induced liver injury.
authors.affiliation: Department of Surgery, Kitasato University School of Medicine, Sagamihara, Japan. yoshiya@email.arizona.edu
authors.forename: Y
authors.initials: Y
authors.lastname: Ito
authors.forename: H
authors.initials: H
authors.lastname: Katagiri
authors.forename: K
authors.initials: K
authors.lastname: Ishii
authors.forename: A
authors.initials: A
authors.lastname: Kakita
authors.forename: I
authors.initials: I
authors.lastname: Hayashi
authors.forename: M
authors.initials: M
authors.lastname: Majima
mesh_terms: D000410:Alanine Transaminase / Q000097:blood; D000818:Animals; D001643:Bridged Bicyclo Compounds / Q000494:pharmacology; D051545:Cyclooxygenase 1; D051546:Cyclooxygenase 2; D052246:Cyclooxygenase 2 Inhibitors; D016861:Cyclooxygenase Inhibitors / Q000494:pharmacology*; D016207:Cytokines / Q000037:antagonists & inhibitors; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005229:Fatty Acids, Monounsaturated / Q000494:pharmacology; D007527:Isoenzymes / Q000037:antagonists & inhibitors / Q000235:genetics; D008099:Liver / Q000378:metabolism; D008102:Liver Circulation / Q000187:drug effects*; D008297:Male; D008565:Membrane Proteins; D008689:Methacrylates / Q000494:pharmacology; D051379:Mice; D008810:Mice, Inbred C57BL; D008833:Microcirculation / Q000187:drug effects; D011451:Prostaglandin-Endoperoxide Synthases / Q000235:genetics; D011720:Pyrazoles / Q000494:pharmacology; D011725:Pyridines / Q000494:pharmacology; D012333:RNA, Messenger / Q000378:metabolism; D044244:Receptors, Thromboxane A2, Prostaglandin H2 / Q000037:antagonists & inhibitors; D015427:Reperfusion Injury / Q000503:physiopathology*; D013930:Thromboxane-A Synthase / Q000037:antagonists & inhibitors; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
chemical_list: D001643:Bridged Bicyclo Compounds; D052246:Cyclooxygenase 2 Inhibitors; D016861:Cyclooxygenase Inhibitors; D016207:Cytokines; D004791:Enzyme Inhibitors; C104334:FR 167653; D005229:Fatty Acids, Monounsaturated; D007527:Isoenzymes; D008565:Membrane Proteins; D008689:Methacrylates; D011720:Pyrazoles; D011725:Pyridines; D012333:RNA, Messenger; D044244:Receptors, Thromboxane A2, Prostaglandin H2; D014409:Tumor Necrosis Factor-alpha; C056566:S 145; D051545:Cyclooxygenase 1; D051546:Cyclooxygenase 2; D011451:Prostaglandin-Endoperoxide Synthases; C496512:Ptgs1 protein, mouse; D000410:Alanine Transaminase; D013930:Thromboxane-A Synthase; C034364:ozagrel