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  • Title: Interleukin 6 in bile as an indicator of liver function after hepatectomy in patients with biliary tract carcinoma.
    Author: Maeda A, Nagino M, Takeuchi E, Sano T, Kurumiya Y, Nimura Y.
    Journal: Br J Surg; 1999 Apr; 86(4):458-64. PubMed ID: 10215814.
    Abstract:
    BACKGROUND: Interleukin (IL) 6 is one of the important components of the early signalling pathways leading to liver regeneration, and has been detected in the bile after liver transplantation. IL-6 concentrations in the bile were studied in an attempt to predict liver function after major hepatectomy for biliary tract carcinoma. METHODS: This study involved 24 patients without cirrhosis who underwent major hepatectomy for biliary tract carcinoma. The bile was sampled regularly through external biliary drainage tubes. IL-6 concentrations in bile and serum were measured using an enzyme-linked immunosorbent assay. RESULTS: Bile IL-6 concentrations increased 37-fold (from mean(s.e.) 56(13) pg/ml before hepatectomy to 2071(398) pg/ml on day 1 after operation) in patients without liver failure after hepatectomy (n = 18) and increased sevenfold (from 71(24) to 530(76) pg/ml) in patients with liver failure after hepatectomy (n = 6). The values were significantly lower in patients with liver failure than in those without liver failure (P < 0.05). The bile IL-6 concentration on day 1 after operation exhibited a significant negative correlation with the maximum serum total bilirubin concentration after hepatectomy. Although serum IL-6 concentrations were also increased in both groups after hepatectomy, there was no significant correlation with postoperative liver function. CONCLUSION: Increased bile IL-6 concentrations after hepatectomy may reflect liver regenerative capacity. Measurement of bile IL-6 concentrations may be clinically useful for the early identification of liver failure after hepatectomy.
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