Biochemical and Biophysical Research Communications
Advanced cancers: eradication in all cases using 3-bromopyruvate therapy to deplete ATP☆,☆☆
Section snippets
Materials and methods
Cell source, passage, culture, and viability or ATP content ±3-BrPA. A highly glycolytic hepatocellular carcinoma (HCC) line “AS-30D” [7], [8] was used and maintained (Fig. 1A) in female Sprague–Dawley rats (Charles River). For culture, cells (∼1 × 106) were seeded on a six-well plate in 2 ml RPMI 1640 medium (Invitrogen) containing 10% fetal bovine serum plus 1× antibiotic–antimycotic mixture (Invitrogen) at 37 °C for 3 h in a CO2 incubator. Hepatocytes (∼ 1.5 × 106) were fresh from Cambrex. Cell
The chemical agent 3-BrPA depletes ATP stores and inhibits HCC cell viability
For therapy, we selected the alkylating agent 3-BrPA [13]. This was based on the hypothesis that because of its structural similarity to lactate (Fig. 1B), the reactive 3-BrPA may enter cancer cells on the same transporter that exports lactate and then induce ATP depletion. Although earlier work [14], [15] showed that 3-BrPA inhibits in vitro the cell’s two ATP producing systems, glycolysis and mitochondria, and has antitumor activity, the most critical support for the above hypothesis is
Acknowledgments
Drs. Paul Talalay and Donald Coffey are acknowledged for valuable discussions and James Fox and David Blum for technical assistance. Y.H.K. is grateful also to Ilona McClintick and Dr. Ann Morrill for encouragement.
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This work was supported by start-up funds to Y.H.K. from the Department of Radiology, by NIH Grants CA 10951 and CA 80118 to P.L.P. and Grant CA92871 to M.G.P.
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Abbreviations: 3-BrPA, 3-bromopyruvic acid; HCC, hepatocellular carcinoma; PET, positron emission tomography; FDG, 18F-2-deoxyglucose.