Abstract
Purpose
To explore the specific alterations in protein profiles that occur during ischemia/reperfusion injury (I/RI) and find novel therapeutic strategies to reduce I/RI during orthotopic liver transplantation (OLT).
Method
We used the comparative proteomic approach of two-dimensional electrophoresis (2-DE) and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) to compare the proteomic profiles of the same donor liver at three different time points: T1, immediately after cardiac arrest of donors (normal control); T2, before portal vein anastomosis (ischemia); and T3, 2 h after hepatic artery anastomosis (reperfusion).
Result
We identified 34 proteins that were significantly altered during I/RI. These differentially expressed proteins were functionally classified into seven categories: metabolic enzyme, molecular chaperone, antioxidant enzyme, cytoskeleton protein, signal transduction protein, cyclin, and binding protein. Among the 34 proteins, 9 changed during ischemia only (from T1 to T2), 11 changed during reperfusion only (from T2 to T3), and the others changed during both ischemia and reperfusion (from T1 to T3) periods.
Conclusion
Ischemia and reperfusion during LT may lead to different modifications of the liver proteins. Most metabolic enzymes and antioxidant enzymes were upregulated during ischemia, indicating that lipid metabolic disorder and oxidative stress are closely related to the development of ischemic injury. ER chaperones may play a vital role in mediating I/RI and preventing ER stress caused by I/RI. Modulation of ER chaperones could be used as a key therapeutic target to improve the outcomes of LT.
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Acknowledgements
The authors thank Dr. Ying Jiang and Dr. JingLi Li for their valuable advice in proteomic analysis. Doctoral Science Foundation, Ministry of Education, China, No. 20090171110071. Guangzhou Technology Scheming Project funding, No. 2009Z1-E211.
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The authors B. Wu and H. Wu contributed equally to this work.
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Wu, B., Wu, H., Chen, J. et al. Comparative proteomic analysis of human donor tissues during orthotopic liver transplantation: ischemia versus reperfusion. Hepatol Int 7, 286–298 (2013). https://doi.org/10.1007/s12072-012-9346-7
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DOI: https://doi.org/10.1007/s12072-012-9346-7