Presence of autocrine hepatocyte growth factor-Met signaling and its role in proliferation and migration of SNU-484 gastric cancer cell line.
Autocrine stimulation via coexpression of hepatocyte growth factor (HGF) and its receptor (Met) has been reported in many human sarcomas, but few in carcinomas. In this report, we found that one gastric cancer cell line, SNU-484, among 11 gastric cell lines tested has an autocrine HGF- Met stimulation. RT-PCR, ELISA and scattering assay using MDCK cells revealed that SNU-484 cells secreted a significant amount of active HGF (about 1.25 +/- 0.41 ng/24 h/10(6) cells) into conditioned medium. Resultantly, Met in this cell line was constitutively phosphorylated. Neutralizing antibodies against HGF reduced the tyrosine phosphorylation of Met, resulting in the inhibition of cell proliferation and migration (P <0.005). To the best of our knowledge, this is the first report on autocrine HGF-Met signaling in a gastric cancer cell line. Our observations with SNU-484 cells suggest that HGF is involved in the development and/or progression of some gastric carcinoma through an autocrine mechanism.
Department of Biochemistry, Ajou University Medical School, San 5 Wonchon-dong, Yeongtong-gu, Suwon 443-721, Korea.
Minseon
M
Park
Hyelee
H
Park
Wook-Hwan
WH
Kim
Hyeseong
H
Cho
Jae-Ho
JH
Lee
D000818:Animals; D000912:Antibodies, Neoplasm / Q000276:immunology; D019898:Autocrine Communication; D002465:Cell Movement; D049109:Cell Proliferation; D017077:Culture Media, Conditioned / Q000494:pharmacology; D004285:Dogs; D004797:Enzyme-Linked Immunosorbent Assay; D017228:Hepatocyte Growth Factor / Q000276:immunology / Q000494:pharmacology*; D009500:Neutralization Tests; D010766:Phosphorylation; D019859:Proto-Oncogene Proteins c-met / Q000235:genetics / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013274:Stomach Neoplasms / Q000276:immunology* / Q000378:metabolism / Q000473:pathology; D014407:Tumor Cells, Cultured; D014443:Tyrosine / Q000378:metabolism
D000912:Antibodies, Neoplasm; D017077:Culture Media, Conditioned; D014443:Tyrosine; D017228:Hepatocyte Growth Factor; D019859:Proto-Oncogene Proteins c-met