Journal
INTERNATIONAL JOURNAL OF ONCOLOGY
Volume 53, Issue 2, Pages 844-854Publisher
SPANDIDOS PUBL LTD
DOI: 10.3892/ijo.2018.4405
Keywords
HDAC6; ACY-1215; oxaliplatin; colorectal cancer; combination therapy; apoptosis
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Funding
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Education, Science and Technology [2016R1D1A1A02937071]
- National Research Foundation of Korea [2016R1D1A1A02937071] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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ACY-1215, also known as ricolinostat, is a leading histone deacetylase 6 inhibitor, which is currently being tested in clinical trials for hematological malignancies. Previous studies have reported that ACY-1215 is not potent enough as a monotherapy for the treatment of colorectal cancer (CRC), which generally requires combination therapy for successful treatment. Therefore, the present study aimed to determine whether the synergistic interaction detected between ACY-1215 and anticancer agents in hematological cancers could occur in solid tumors. The results of the present study indicated that ACY-1215 exerted a potent synergistic anti-proliferative effect when used in combination with anticancer agents in CRC cells. The combination of ACY-1215 and oxaliplatin was more potent than either drug alone, as indicated by an increase in apoptotic cells and their effects on the apoptotic pathway; ACY-1215 and oxaliplatin cotreatment activated caspase-3 and poly (ADP ribose) polymerase, increased B-cell lymphoma (Bcl)-2 homologous antagonist/killer expression, and decreased Bcl-extra large protein, phosphorylated-extracellular signal-regulated kinase and phosphorylated-protein kinase B expression. In addition, combined treatment of ACY-1215 and anticancer agents induced synergistic upregulation of programmed death-ligand 1. These findings suggested that a therapeutic strategy that combines ACY-1215 and oxaliplatin warrants attention for the treatment of solid tumors, including CRC.
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