Interaction of Kupffer Cells and Platelets Determines the Severity of Ischemia-Reperfusion Injury in Steatosis

被引:3
作者
Ogawa, Koichi [1 ]
Kondo, Tadashi [1 ]
Tamura, Takafumi [1 ]
Matsumura, Hideki [1 ]
Fukunaga, Kiyoshi [1 ]
Murata, Soichiro [1 ]
Ohkohchi, Nobuhiro [1 ]
机构
[1] Univ Tsukuba, Dept Surg, Grad Sch Comprehens Human Sci, Tsukuba, Ibaraki 3058575, Japan
关键词
intravital microscopy; ischemia-reperfusion; Kupffer cell; platelet; steatosis; LIVER-TRANSPLANTATION; HEPATIC ISCHEMIA; IN-VIVO; POSTOPERATIVE COMPLICATIONS; FATTY LIVER; RAT-LIVER; MICROCIRCULATION; INFLAMMATION; ADHESION; TISSUE;
D O I
10.1620/tjem.232.105
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Liver steatosis increases the risk of postoperative complications following major liver resection, since the steatotic liver is susceptible to ischemia-reperfusion (IR) injury. However, it is unclear how IR injury changes in relation to the degree of hepatic steatosis. Previously, we reported that interaction between Kupffer cells (KCs) and platelets induced hepatic IR injury. The aim of our present study was to evaluate the relationship between the degree of liver steatosis and IR injury by focusing on the interaction of KCs and platelets. Mild and moderate steatotic liver models were generated in Wistar rats by feeding a cholinedeficient diet for 2 and 4 weeks, respectively. The intensity of steatosis was defined based on the proportion of hepatocytes with fatty infiltration: normal (less than 5%), a mild steatosis (5-30%), and moderate steatosis (30-60%). All groups were subjected to 20 min of warm ischemia followed by 120 min of reperfusion. The number of adhesion of KCs to platelets in sinusoids was observed by intravital microscopy. IR injury was evaluated with serum alanine aminotransferase levels, histological findings, and sinusoidal perfusion. Compared to the normal liver, mild steatosis reduced the adhesion of KCs to platelets, inducing the attenuation of IR injury. In contrast, moderate steatosis increased the adhesion of KCs to platelets, aggravating IR injury relative to the normal liver. IR injury in the steatotic liver was not simply proportional to the degree of steatosis. Mild steatosis ameliorates IR injury compared to the normal liver, whereas moderate steatosis increases IR injury.
引用
收藏
页码:105 / 113
页数:9
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