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. 1995 Aug;48(4):M205–M209. doi: 10.1136/mp.48.4.m205

Expression of hepatocyte growth factor receptor (c-met) mRNA in primary cultures of human hepatocytes

S Hirono 1, S Afford 1, A J Strain 1
PMCID: PMC407964  PMID: 16696008

Abstract

Aim—To investigate the regulation of hepatocyte growth factor (HGF) receptor (c-met) gene expression in isolated primary human hepatocytes.

Methods—Primary hepatocytes were maintained in monolayer culture for up to 72 hours in serum-free medium. They were treated with growth factors and the level of HGF, c-met and reduced glyceraldehyde-phosphate dehydrogenase mRNA expression determined by northern blot analysis.

Results—Hepatocytes expressed a single 9 kilobase c-met gene transcript whilst HGF mRNA analysis was negative. Addition of HGF and epidermal growth factor, both potent mitogens for human hepatocytes, enhanced c-met mRNA expression approximately twofold within 24 hours, after which levels returned to normal. In non-growth factor treated cells, transforming growth factor-β (TGFβ) had little effect upon c-met mRNA levels. However, TGFβ inhibited the HGF induced increase in c-met mRNA levels.

Conclusions—These results indicate that hepatocytes which proliferate in response to HGF demonstrate levels of c-met mRNA which are subject to growth factor modulation and suggest an important means of growth regulatory control.

Keywords: Hepatocyte growth factor, c-met receptor, human hepatocytes, growth control

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