Abstract
The liver has a remarkable regenerative capacity with different modes of regeneration according to the type and extent of an injury. It has been reported that mature hepatocytes could transdifferentiate into a cholangiocyte phenotype. Sry HMG box protein 9 (SOX9) is one of the earliest biliary markers that regulate bile duct development. We have found that SOX9-positive biphenotypic hepatocytes appear in severe acute liver injury patients' liver specimens accompanied by an elevation in plasma interleukin-8 levels. In vitro assays revealed that interleukin-8 homologs induce the expression of SOX9 in mature mouse hepatocytes. Here, we describe the methods used to detect SOX9-positive hepatocytes in human liver specimens and to induce SOX9-positive hepatocytes in mature mouse hepatocytes.
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