title: Hepatoprotective effect of a nonselective endothelin receptor antagonist (TAK-044) in the transplanted liver.
abstract: This study was designed to investigate whether or not a novel nonselective endothelin A/B (ETA/ETB) receptor antagonist (TAK-044) provides hepatoprotection during porcine liver transplantation. The grafts were stored in chilled Euro-Collins solution and recirculated following reflush with lactated Ringer's with (TAK group) or without (control group) TAK-044 (10 mg/kg). Intracellular (cytoplasma, mitochondria, and nucleus) calcium (Ca) concentrations were measured in the hepatic biopsy materials obtained serially at varying time point from donor laparotomy to recipient closure using an electron probe X-ray microanalyzer. Liver function tests also were determined. The cold and warm ischemia times of the grafts were comparable between the two groups. The peak endothelin-1 T-1) concentration after recirculation was significantly higher in the TAK group than in the control group (129 +/- 30 pg/ml vs 26 +/- 6.5 pg/ml). However, release of liver enzymes, increases in total bile acid, and deterioration of indocyanine green retention rate were significantly suppressed in the TAK group. In the control group, the intracellular Ca concentrations, especially in the mitochondrial fraction, were elevated markedly following recirculation of the hepatic arterial flow. In the TAK group, this effect was suppressed. Thus, the supplementary use of the nonselective ETA/ETB receptor antagonist TAK-044 via a rinse route may alleviate an early postreperfusion microcirculatory disturbance of the liver grafts without adverse effects by the increased ET-1 on the systemic circulation.
authors.affiliation: First Department of Surgery, Hyogo College of Medicine, Nishinomiya, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Yamanaka
authors.forename: Y
authors.initials: Y
authors.lastname: Takaya
authors.forename: T
authors.initials: T
authors.lastname: Oriyama
authors.forename: K
authors.initials: K
authors.lastname: Furukawa
authors.forename: T
authors.initials: T
authors.lastname: Tanaka
authors.forename: W
authors.initials: W
authors.lastname: Tanaka
authors.forename: N
authors.initials: N
authors.lastname: Ichikawa
authors.forename: C
authors.initials: C
authors.lastname: Yasui
authors.forename: T
authors.initials: T
authors.lastname: Ando
authors.forename: J
authors.initials: J
authors.lastname: Yamanaka
authors.forename: N
authors.initials: N
authors.lastname: Kuroda
authors.forename: M
authors.initials: M
authors.lastname: Ko
authors.forename: M
authors.initials: M
authors.lastname: Takada
authors.forename: M
authors.initials: M
authors.lastname: Imakita
authors.forename: Y
authors.initials: Y
authors.lastname: Kitayama
authors.forename: E
authors.initials: E
authors.lastname: Okamoto
authors.forename: S
authors.initials: S
authors.lastname: Sasaki
authors.forename: I
authors.initials: I
authors.lastname: Nakagaki
authors.forename: S
authors.initials: S
authors.lastname: Hori
authors.forename: T
authors.initials: T
authors.lastname: Ito
mesh_terms: D000818:Animals; D002118:Calcium / Q000378:metabolism; D002467:Cell Nucleus / Q000378:metabolism; D065128:Endothelin Receptor Antagonists; D019332:Endothelin-1 / Q000097:blood; D005260:Female; D008099:Liver / Q000502:physiology; D016031:Liver Transplantation / Q000379:methods*; D008930:Mitochondria, Liver / Q000378:metabolism; D010456:Peptides, Cyclic / Q000494:pharmacology*; D015427:Reperfusion Injury / Q000517:prevention & control; D013552:Swine
chemical_list: D065128:Endothelin Receptor Antagonists; D019332:Endothelin-1; D010456:Peptides, Cyclic; C088196:TAK 044; D002118:Calcium