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The preclinical activity of the histone deacetylase inhibitor PXD101 (belinostat) in hepatocellular carcinoma cell lines

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Summary

The activity of the histone deacetylase inhibitor PXD101 was investigated in three hepatocellular carcinoma (HCC) cell lines. PXD101was found to inhibit cell growth at a dose-dependent manner and induce histone acetylation in PLC/PRF/5, Hep3B and HepG2 cells. In PLC/PRF/5 and Hep3B cells which express hepatitis B-related genes (HBx, HBc and HBc), treatment with PXD101 resulted in apoptosis without a significant effect on viral gene expression. Exposure to PXD101 for up to 48 h had varying effects on the expression of 12 cellular genes with tumor suppressor functions, including p21, SOCS1, CMTM5, RASAL1, DLEC1, SFRP (-1, -2, -4 and -5), ADAMTS (-8 and -9). This study provided the basis for a phase II clinical trial of PXD101 in inoperable hepatitis-B associated HCC.

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Acknowledgements

This study was sponsored by the Cancer Therapy Evaluation Program of the National Cancer Institute (Bethesda, USA). Result of this study was presented as a poster at the 98th American Association of Cancer Research annual meeting in April 2007, Los Angeles; abstract number 2494. This study was funded by the Direct Grant of the Chinese University of Hong Kong (Reference 2005.1.018), and the Li Ka Shing Institute for Health Sciences.

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Correspondence to Brigette B.Y. Ma.

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Ma, B.B., Sung, F., Tao, Q. et al. The preclinical activity of the histone deacetylase inhibitor PXD101 (belinostat) in hepatocellular carcinoma cell lines. Invest New Drugs 28, 107–114 (2010). https://doi.org/10.1007/s10637-009-9219-7

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