Abstract |
The chronological expression (over 24 h) of two adhesion molecules [intercellular adhesion molecule-1 (ICAM-1) and CD11b/CD18 (Mac-1)] and the extent of liver damage, including injury to sinusoidal endothelial cells (SECs) and hepatocyte apoptosis, were investigated under two conditions of rat liver ischemia-reperfusion (I/R) injury: reversible (30 min) and fatal I/R (60 min). The chronological profiles of upregulation of ICAM-1 on hepatocytes and Mac-1 showed changes in parallel with the other liver damage parameters, and the extent of upregulation and various parameters of liver injury were more advanced in the 60-min I/R group. Paradoxically, the degree of ICAM-1 upregulation of SECs decreased significantly in the 60-min I/R group vs. the 30-min I/R group. Repression of hepatocyte apoptosis by administration of the caspase inhibitor ZVAD-fmk resulted in attenuation of neutrophil infiltration and liver injury. These findings indicate that 1) neutrophil infiltration is involved in the development of liver I/R injury; 2) interaction between ICAM-1 on SECs and Mac-1 on neutrophils is not an essential step for neutrophil transmigration through the endothelial layer because SECs, specifically, were impaired in the early stages of liver I/R injury; 3) the role of ICAM-1 and Mac-1 is to adhere neutrophils firmly to hepatocytes and activate neutrophils; and 4) excessive parenchymal apoptosis may be the signal for the neutrophil-induced inflammatory and necrotic reaction.
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Authors | A Kobayashi, H Imamura, M Isobe, Y Matsuyama, J Soeda, K Matsunaga, S Kawasaki |
Journal | American journal of physiology. Gastrointestinal and liver physiology
(Am J Physiol Gastrointest Liver Physiol)
Vol. 281
Issue 2
Pg. G577-85
(Aug 2001)
ISSN: 0193-1857 [Print] United States |
PMID | 11447039
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Amino Acid Chloromethyl Ketones
- CD18 Antigens
- Caspase Inhibitors
- Cysteine Proteinase Inhibitors
- Macrophage-1 Antigen
- benzyloxycarbonylvalyl-alanyl-aspartyl fluoromethyl ketone
- Intercellular Adhesion Molecule-1
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Topics |
- Amino Acid Chloromethyl Ketones
(pharmacology)
- Animals
- Apoptosis
- CD18 Antigens
(metabolism)
- Caspase Inhibitors
- Cell Nucleus
(ultrastructure)
- Cysteine Proteinase Inhibitors
(pharmacology)
- DNA Fragmentation
- Intercellular Adhesion Molecule-1
(metabolism)
- Kinetics
- Liver Diseases
(metabolism, pathology)
- Macrophage-1 Antigen
(metabolism)
- Male
- Necrosis
- Neutrophil Infiltration
(drug effects)
- Rats
- Rats, Wistar
- Reperfusion Injury
(metabolism, pathology)
- Survival Rate
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