Objectives To establish the cell model of fibroblast in tumor and explore its malignant bionomics for providing valuable cell model for studying their transforming mechanism and developing drugs targeting the tumor stroma in the future. Methods The murine normal fibroblast cells, L 929 , were cultured with the supernatant of murine hepatocellular carcinoma cells, H 22 , for three and a half months, and L 929 -H 22 cells were acquired with stable growth. Then the changes of their biological characteristics were determined by light microscopy, electron microscopy, karyotype analysis, and MTT assay. The expressions of PCNA, bcl-2, MMP-9, TN, and tolomerase activity were detected by immunocytochemistry and RT-PCR, respectively. The ability to synthesize proteins and the effects of their supernatant on H 22 growth were determined. Results Abnormal nuclei and multinuclei were observed in L 929 -H 22 cells, and their chromatosome modes increased slightly. As compared with the parental cells, the population doubling time of L 929 -H 22 cells shortened (t=2.654 1, P

Objective:To investigate the effect of sodium butytate (different concentrations) on the growth and proliferation of rat liver oval cell line WB-F344, and to discuss the conditions and rules for sodium butyrate-inducd WB-F344 cells differentiation into biliary lineage in vitro. Methods: WB-F344 cells were treated with sodium butyrate (0.75, 2.25, 3.75, 4.5 mmol/L) and the cell growth and morphological changes were observed; routinely cultured WB-F344 cells were taken as control. The changes of CK19 protein expression were examined immunohistochemically after WB-F244 cells were treated with 3.75% sodium butyrate; and the expression of phenotypic markers, such as ?-glutamyltransferase (GGT) ,?4-integrin, CK19, AFP and ALB at mRNA level were determined by RT-PCR. Untreated WB-F344 cells were used as blank control. Results: We found that sodium butyrate inhibited the growth of WB-F344 cells. The optical densities were significantly decreased in 3.75 and 4.5 mmol/L groups compared with that in control group(P