Abstract:
BACKGROUND:Small-for-size grafts often cause persistent conjugated hyperbilirubinemia in the recipient after adult-to-adult living donor liver transplantation, but the cause has not yet been clarified. In physiologic status, bilirubin is excreted from hepatocytes to the bile canaliculus by means of multidrug resistance protein (MRP) 2 and, in particular circumstances, by means of MRP3 to the sinusoidal space. The aim of this study was to research whether there is any change in bilirubin excretion pattern during liver regeneration with reference to expression of MRP2 and MRP3. METHODS:Sprague-Dawley rats underwent sham operation (n=37), 70% hepatectomy (n=38), or 90% hepatectomy (n=37). The degree of liver regeneration, total and direct bilirubin, protein synthesis, and interleukin (IL)-6 were serially assessed. Expression of MRP2 and MRP3 were semiquantified by Western blotting. RESULTS:The proliferating cell nuclear antigen labeling index indicated rapid liver regeneration after 70% and 90% hepatectomy. Serum levels of total and direct bilirubin increased significantly (P<0.05), and conjugated hyperbilirubinemia was proved only in the 90% hepatectomy group. Coagulation factor VII dipped but increased as early as 12 to 24 hr postoperatively in both hepatectomy groups. Plasma IL-6 levels were significantly increased in the 90% hepatectomy group (P<0.05). Expression of MRP2 was decreased and MRP3 was expressed at 36 and 72 hr postoperatively in the 90% hepatectomy group, whereas no change was observed in MRP expression in the 70% hepatectomy group. CONCLUSIONS:During liver regeneration after critical hepatectomy such as 90% hepatectomy, decrease of MRP2 and expression of MRP3 may play an important role in postoperative hyperbilirubinemia.
journal_name
Transplantationjournal_title
Transplantationauthors
Chang TH,Hakamada K,Toyoki Y,Tsuchida S,Sasaki Mdoi
10.1097/01.TP.0000089234.93366.6Dsubject
Has Abstractpub_date
2004-01-15 00:00:00pages
22-7issue
1eissn
0041-1337issn
1534-6080journal_volume
77pub_type
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