Decreased Mrp2-Dependent Bile Flow in the Post-Warm Ischemic Rat Liver

Daisuke Ban, Atsushi Kudo, Shaoguang Sui, Shinji Tanaka, Noriaki Nakamura, Koji Ito, Makoto Suematsu, Shigeki Arii

研究成果: Article

22 引用 (Scopus)

抄録

Background: The link between microcirculatory disturbance and hepatocellular dysfunction remains unknown. The present study was designed to examine the key event of warm ischemia reperfusion (WIR) injury with subsequent cholestasis. Methods: A left lobar 70% ischemia and reperfusion rat model was used in this study. The portal vein and hepatic artery to the left lateral lobe of the liver were subjected to 20 min of warm ischemia followed by 60 min of reperfusion to collect bile and to measure its constituents. Results: The hepatocellular injury was increased significantly in livers exposed to WIR, as judged by serum alanine aminotransferase. This event coincided with decreased bile production and biliary concentration of glutathione (GSH), suggesting impaired bile salts-independent bile flow, while biliary phospholipids and bile salts were not decreased. Additionally, hepatic adenosine triphosphate and GSH were not decreased after WIR. Since the biliary GSH, which is a major driving force for bile salts-independent bile flow, is excreted from hepatocytes into the bile via multidrug resistance protein 2 (Mrp2), we examined whether intracellular localization of Mrp2 occurred. Immunohistochemical analyses revealed hepatocellular Mrp2 was retrieved from bile canalicular membrane into the pericanalicular cytoplasm in the post-warm ischemic livers. Microcirculatory disturbance in livers exposed to 20 min of warm ischemia improved to levels comparable to controls. Conclusion: Mrp2 internalization, observed in this study, may play an important determinant of cholestasis in the post-warm ischemic livers.

元の言語English
ページ(範囲)310-316
ページ数7
ジャーナルJournal of Surgical Research
153
発行部数2
DOI
出版物ステータスPublished - 2009 5 15

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Warm Ischemia
Bile
Reperfusion
Liver
Bile Acids and Salts
Cholestasis
Hepatic Artery
Portal Vein
Reperfusion Injury
Alanine Transaminase
Glutathione
P-glycoprotein 2
Hepatocytes
Phospholipids
Cytoplasm
Ischemia
Adenosine Triphosphate
Membranes
Wounds and Injuries
Serum

ASJC Scopus subject areas

  • Surgery

これを引用

Ban, D., Kudo, A., Sui, S., Tanaka, S., Nakamura, N., Ito, K., ... Arii, S. (2009). Decreased Mrp2-Dependent Bile Flow in the Post-Warm Ischemic Rat Liver. Journal of Surgical Research, 153(2), 310-316. https://doi.org/10.1016/j.jss.2008.02.064

Decreased Mrp2-Dependent Bile Flow in the Post-Warm Ischemic Rat Liver. / Ban, Daisuke; Kudo, Atsushi; Sui, Shaoguang; Tanaka, Shinji; Nakamura, Noriaki; Ito, Koji; Suematsu, Makoto; Arii, Shigeki.

:: Journal of Surgical Research, 巻 153, 番号 2, 15.05.2009, p. 310-316.

研究成果: Article

Ban, D, Kudo, A, Sui, S, Tanaka, S, Nakamura, N, Ito, K, Suematsu, M & Arii, S 2009, 'Decreased Mrp2-Dependent Bile Flow in the Post-Warm Ischemic Rat Liver', Journal of Surgical Research, 巻. 153, 番号 2, pp. 310-316. https://doi.org/10.1016/j.jss.2008.02.064
Ban, Daisuke ; Kudo, Atsushi ; Sui, Shaoguang ; Tanaka, Shinji ; Nakamura, Noriaki ; Ito, Koji ; Suematsu, Makoto ; Arii, Shigeki. / Decreased Mrp2-Dependent Bile Flow in the Post-Warm Ischemic Rat Liver. :: Journal of Surgical Research. 2009 ; 巻 153, 番号 2. pp. 310-316.
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AU - Ban, Daisuke

AU - Kudo, Atsushi

AU - Sui, Shaoguang

AU - Tanaka, Shinji

AU - Nakamura, Noriaki

AU - Ito, Koji

AU - Suematsu, Makoto

AU - Arii, Shigeki

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N2 - Background: The link between microcirculatory disturbance and hepatocellular dysfunction remains unknown. The present study was designed to examine the key event of warm ischemia reperfusion (WIR) injury with subsequent cholestasis. Methods: A left lobar 70% ischemia and reperfusion rat model was used in this study. The portal vein and hepatic artery to the left lateral lobe of the liver were subjected to 20 min of warm ischemia followed by 60 min of reperfusion to collect bile and to measure its constituents. Results: The hepatocellular injury was increased significantly in livers exposed to WIR, as judged by serum alanine aminotransferase. This event coincided with decreased bile production and biliary concentration of glutathione (GSH), suggesting impaired bile salts-independent bile flow, while biliary phospholipids and bile salts were not decreased. Additionally, hepatic adenosine triphosphate and GSH were not decreased after WIR. Since the biliary GSH, which is a major driving force for bile salts-independent bile flow, is excreted from hepatocytes into the bile via multidrug resistance protein 2 (Mrp2), we examined whether intracellular localization of Mrp2 occurred. Immunohistochemical analyses revealed hepatocellular Mrp2 was retrieved from bile canalicular membrane into the pericanalicular cytoplasm in the post-warm ischemic livers. Microcirculatory disturbance in livers exposed to 20 min of warm ischemia improved to levels comparable to controls. Conclusion: Mrp2 internalization, observed in this study, may play an important determinant of cholestasis in the post-warm ischemic livers.

AB - Background: The link between microcirculatory disturbance and hepatocellular dysfunction remains unknown. The present study was designed to examine the key event of warm ischemia reperfusion (WIR) injury with subsequent cholestasis. Methods: A left lobar 70% ischemia and reperfusion rat model was used in this study. The portal vein and hepatic artery to the left lateral lobe of the liver were subjected to 20 min of warm ischemia followed by 60 min of reperfusion to collect bile and to measure its constituents. Results: The hepatocellular injury was increased significantly in livers exposed to WIR, as judged by serum alanine aminotransferase. This event coincided with decreased bile production and biliary concentration of glutathione (GSH), suggesting impaired bile salts-independent bile flow, while biliary phospholipids and bile salts were not decreased. Additionally, hepatic adenosine triphosphate and GSH were not decreased after WIR. Since the biliary GSH, which is a major driving force for bile salts-independent bile flow, is excreted from hepatocytes into the bile via multidrug resistance protein 2 (Mrp2), we examined whether intracellular localization of Mrp2 occurred. Immunohistochemical analyses revealed hepatocellular Mrp2 was retrieved from bile canalicular membrane into the pericanalicular cytoplasm in the post-warm ischemic livers. Microcirculatory disturbance in livers exposed to 20 min of warm ischemia improved to levels comparable to controls. Conclusion: Mrp2 internalization, observed in this study, may play an important determinant of cholestasis in the post-warm ischemic livers.

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KW - biliary glutathione

KW - cholestasis

KW - hepatic glutathione

KW - internalization of Mrp2

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KW - microcirculatory disturbance

KW - multidrug resistance protein 2

KW - warm ischemia and reperfusion

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