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Antineoplastic mechanism of Octreotide action in human hepatoma
1Department of General Surgery, Zhongnan Hospital, Wuhan University, Wuhan 430071, China. stanchendoctor@China.com
Objectives:
To investigate whether apoptosis can be induced by Octreotide in human hepatoma cells in vitro and elucidate the antineoplastic mechanism of Octreotide in hepatoma.
Methods:
A cultured human hepatoma cell line, BEL-7402, was exposed to Octreotide and apoptosis was evaluated by cytochemical staining (Hochesst 33,258), transmission electron microscopy, agarose gel electrophoresis and flow cytometry (FCM).
Results:
After exposure to 0.2 microgram/ml Octreotide, apoptosis with nuclear chromatin condensation as well as fragmentation, cell shrinkage and the formation of apoptotic bodies was observed using cytochemical staining and transmission electron microscopy. A DNA ladder in agarose gel electrophoresis was also displayed. FCM showed that the apoptotic cell number rose with an increase in the concentration of Octreotide (0-2 micrograms/ml). There was a positive correlation between Octreotide concentration and apoptotic rate in BEL-7402 cells (r = 0.809, P < 0.05).
Conclusion:
Apoptosis in human hepatoma cells can be induced by Octreotide, which may be related to the mechanism of antineoplastic action of Octreotide in hepatoma.