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Cursio, R. et al.

R. Cursio, P. Colosetti, P. Auberger, J. Gugenheim,

Liver apoptosis following normothermic ischemia-reperfusion: in vivo evaluation of caspase activity by FLIVO assay in rats.

Normothermic liver ischemia-reperfusion (I-R) may induce hepatocellular apoptosis. Caspase activation is involved in the initiation and execution of apoptosis. The aim of this study was to determine in vivo caspase activity in normothermic liver I-R in rats. Segmental normothermic ischemia of the liver was induced for 120 minutes in rats. After intravenous injection of the green probe FLIVO, in vivo caspase-3- and -7-specific activity was determined using fluorescence microscopy, in either nonischemic or ischemic liver lobes at 3 and 6 hours after reperfusion. Liver apoptosis was assessed by the deoxynucleotide transferase-mediated deoxyuridine triphosphate nick end labeling (TUNEL) assay. Fluorescence microscopy showed that in vivo caspase-3- and -7-specific activities were significantly increased (P< .005) in ischemic lobes at 3 and 6 hours of reperfusion, compared with nonischemic liver lobes. Quantitative analysis of apoptotic cells measured by the TUNEL method showed a significant increase among apoptotic cells in ischemic lobes at 3 and 6 hours after reperfusion (P< .005), compared with nonischemic liver lobes. In conclusion, 120-minute normothermic liver I-R resulted in increased caspase-3- and -7-specific activities and in liver cell apoptosis.[1]

References

Liver apoptosis following normothermic ischemia-reperfusion: in vivo evaluation of caspase activity by FLIVO assay in rats. Cursio, R., Colosetti, P., Auberger, P., Gugenheim, J. Transplant. Proc. (2008) [Pubmed]

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