Establishment and Characterization of a Cell Line from a Chemically-induced Mouse Hepatoblastoma.

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We established a cell line (MHB-2) from a hepatoblastoma (HB) induced by diethylnitrosamine (DEN) and sodium phenobarbital (PB) in male B6C3F1 mice and examined the biological characteristics of MHB-2. MHB-2 cells grew as monolayers in culture and showed a spindle or polygonal shape. Immunohistochemically, the original tumor cells and MHB-2 cells were negative for keratin, alpha-fetoprotein and albumin. Electron microscopically, MHB-2 cells had irregular-shaped nuclei with prominent nucleoli, abundant free ribosomes, myelinosomes, desmosomes and surface microvilli. Growth of this cell line was significantly accelerated by hepatocyte growth factor (HGF) and expression of its receptor c-met was confirmed by the reverse transcription-polymerase chain reaction (RT-PCR). MHB-2, however, was not found to be tumorigenic when transplanted into the subcutaneous tissue of syngeneic, nude or scid mice. To our knowledge, this is the first report on the establishment of a cell line derived from a mouse HB. MHB-2 would be useful for further studies to clarify the biological characteristics of mouse HB.
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Establishment and Characterization of a Cell Line from a Chemically-induced Mouse Hepatoblastoma.

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