Effect of Tumstatin T-7 Peptide on HepG-2 Cells and Human Umbilical Vein Endothelial Cells

The direct anti-tumor T-7 peptide of tumstatin was obtained to study its effect on human hepatoma cells (HepG-2) and human umbilical vein endothelial cells (ECV304). T-7 peptide was synthesized and its purity was up to 98.5%. MTT assay, growth curve, transmission electron microscopy(TEM) were used to detect the proliferation inhibition and pro-apoptotic function. MTT experiments and growth curve experiments showed that the survival of human hepatoma cells (HepG-2) decreased in a time- and dose-dependent way with the concentration of T-7 peptide increased. T-7 peptide can induce apoptosis of HepG-2 significantly. Apoptosis features were observed by TEM. However, the inhibition of T-7 peptide on human umbilical vein endothelial cells (ECV304) was weaker. Experiments showed thatT-7 peptide can affect HepG-2 cells. It had a certain therapeutic effect on human hepatocellular carcinoma. T-7 peptide have little effect on ECV304 cells, which means it didn’t influence the formation of tumor angiogenesis and normal cells