An endogenous colon mitosis inhibitor reduces proliferation of colon carcinoma cells (HT 29) in serum-restricted medium
Virchows Archiv. B, Cell pathology including molecular pathology(1989)
摘要
Summary Extracts of mouse intestine contain a colonic epithelial mitosis inhibitor that has recently been purified and identified
as a tripeptide (pGlu-His-GlyOH). In order to elucidate further the biological characteristics of this peptide, the effect
of the tripeptide on cell proliferation in a human colon carcinoma cell line (HT 29) was examined. The incorporation of tritiated
thymidine was significantly reduced at 20–30 h after addition of the tripeptide. The dose-response relationship was bellshaped
with loss of inhibitory effect at high or low doses. The number of cells were significantly reduced at a peptide concentration
of 10−8 M at 24 h, but not at 48 or 72 h after addition of the peptide. The inhibition was reversible, and was only observed when
the cells were grown in a serum-restricted medium (1%). The inhibitory effect was abolished by increasing the serum content
to 10% or adding insulin to the medium.
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关键词
Cell proliferation,Colon carcinoma cells,Inhibition,Peptides
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