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Japanese Journal of Cancer Research : Gann logoLink to Japanese Journal of Cancer Research : Gann
. 1996 Feb;87(2):146–152. doi: 10.1111/j.1349-7006.1996.tb03152.x

Establishment of a Hepatocyte Cell Line Producing Growth‐promoting Factors for Liver‐colonizing Tumor Cells

Takao Yamori 1,✉, Koji Shimada 1,4, Hiroaki Kanda 2, Yumiko Nishizuru 1, Akiko Komi 1, Kanami Yamazaki 1, Keiko Asanoma 1, Masako Ogawa 1, Kimie Nomura 2, Nobuo Nemoto 3, Kaoru Kumada 4, Takashi Tsuruo 1,5
PMCID: PMC5921062  PMID: 8609063

Abstract

A hepatocyte‐derived cell line designated MLE‐15A2 was established from a primary culture of mouse hepatocytes. The MLE‐15A2 cells appeared to retain the basic nature of hepatocytes in that they showed morphology of an epithelial cell type and secreted albumin into the culture medium. These cells were grown on collagen‐coated plates and could be easily expanded to a large‐scale culture. Therefore, MLE‐15A2 cells may provide a more useful model for studying liver microenvironments than primary cultures of hepatocytes. We found that conditioned media from MLE‐15A2 cells, as well as from primary cultures of hepatocytes, promoted the proliferation of highly liver‐colonizing colon 26 NL‐17 cells better than the poorly liver‐colonizing colon 26 NL‐4 cells. Moreover, the conditioned media stimulated the growth of some human colon cancer cell lines. These results indicate that MLE‐15A2 cells secrete growth factors that selectively stimulate certain tumor cell types. Hepatocyte‐derived growth factors may regulate selective survival and colonization of tumor cells in the process of liver metastasis. The growth‐promoting activity was unaffected by dialysis, was stable at 80°C for 30 min and was bound to a heparin‐Sepharose column. The major activity was eluted from the column with 0.7–0.75 M NaCl, and some minor activities eluted with lower concentrations of NaCl. These results suggest that the active components are heterogeneous heparin‐binding proteins with lower affinity to heparin than platelet‐derived and fibroblast growth factors.

Keywords: Metastasis, Microenvironment, Hepatocyte, Liver‐derived growth factor

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