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Japanese Journal of Cancer Research : Gann logoLink to Japanese Journal of Cancer Research : Gann
. 1996 Nov;87(11):1134–1142. doi: 10.1111/j.1349-7006.1996.tb03123.x

Primary Human Fibroblasts Induce Diverse Tumor Invasiveness: Involvement of HGF as an Important Paracrine Factor

Takashi Iwazawa 1,, Hitoshi Shiozaki 1, Yuichiro Doki 1, Masatoshi Inoue 1, Shigeyuki Tamura 1, Shigeo Matsui 1, Takushi Monden 1, Kunio Matsumoto 2, Toshikazu Nakamura 2, Morito Monden 1
PMCID: PMC5921007  PMID: 9045942

Abstract

Fibroblasts have been considered to play an important role in tumor progression. In order to evaluate the contribution of fibroblasts to tumor invasion, TE2‐NS, an esophageal cancer cell line, was cultured on collagen gel containing primary fibroblasts derived from normal esophageal submucosa or cancerous tissues of seven esophageal cancer patients. TE2‐NS showed diverse invasiveness into the underlying gel containing fibroblasts, but did not invade the gel not containing fibroblasts. The invasiveness of TE2‐NS, which expressed hepatocyte growth factor (HGF) receptor, was well‐correlated with the concentration of HGF in conditioned medium. Administration of neutralizing antibody against HGF effectively suppressed the invasion, but application of recombinant HGF without fibroblasts induced little invasion into the gel. Fibroblasts from non‐cancerous tissue generally secreted a larger amount of HGF and induced tumor invasion to a greater extent than those from cancer tissue, with large diversity. Interestingly, HGF secretion of fibroblasts from non‐cancerous tissue was stimulated by co‐culture with TE2‐NS in two lines, but not in the other four. These results indicate that HGF is an important paracrine factor which induces tumor cell invasion, and the diversity of HGF production by fibroblasts might suggest different potentiality to induce tumor invasion among patients.

Keywords: Hepatocyte growth factor, Primary fibroblast, Esophageal cancer, Tumor invasion, Organotypic raft culture

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