The proton pump inhibitor inhibits cell growth and induces apoptosis in human hepatoblastoma.

Pediatric Surgery International
Toshiya MorimuraAkira Satomi

Abstract

In normal physiology, a vacuolar-type proton pump (V-ATPase) maintains an intracellular acid microenvironment in lysosome, endosome, and other endomembrane systems. Cancer cells overexpress V-ATPase compared with normal cells, and disturbances of the acid environment are thought to significantly impact the cancer cell infiltration and growth. Bafilomycin A1 (Baf-A1) is a specific inhibitor of the proton-pump inhibitor (PPI) V-ATPase. Neoplastic cells are reportedly more sensitive to Baf-A1 than normal cells, and the difference between the susceptibility to Baf-A1 in normal cells and that in cancer cells may become a target in the cancer therapy. With this in mind, we used cells of hepatoblastoma, the cancer type accounting for 80% of all childhood liver cancers, to investigate the effects of Baf-A1 as an inducer of cancer cell apoptosis and inhibitor of cancer cell reproduction Electron microscopy showed significant morphological change of the hepatoblastoma cells of the Baf-A1-treated group compared with hepatoblastoma cells of the Baf-A1-free group. The rate of the apoptotic cell increased, and cell reproduction was inhibited. Moreover, the analysis of hepatoblastoma cells using the gene Chip gene expression analysis arrays s...Continue Reading

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