Phase 1 study of the histone deacetylase inhibitor vorinostat (suberoylanilide hydroxamic acid [SAHA]) in patients with advanced leukemias and myelodysplastic syndromes.

Abstract

Vorinostat (suberoylanilide hydroxamic acid, SAHA) is a histone deacetylase inhibitor active clinically in cutaneous T-cell lymphoma and preclinically in leukemia. A phase 1 study was conducted to evaluate the safety and activity of oral vorinostat 100 to 300 mg twice or thrice daily for 14 days followed by 1-week rest. Patients with relapsed or refractory leukemias or myelodysplastic syndromes (MDS) and untreated patients who were not candidates for chemotherapy were eligible. Of 41 patients, 31 had acute myeloid leukemia (AML), 4 chronic lymphocytic leukemia, 3 MDS, 2 acute lymphoblastic leukemia, and 1 chronic myelocytic leukemia. The maximum tolerated dose (MTD) was 200 mg twice daily or 250 mg thrice daily. Dose-limiting toxicities were fatigue, nausea, vomiting, and diarrhea. Common drug-related adverse experiences were diarrhea, nausea, fatigue, and anorexia and were mild/moderate in severity. Grade 3/4 drug-related adverse experiences included fatigue (27%), thrombocytopenia (12%), and diarrhea (10%). There were no drug-related deaths; 7 patients had hematologic improvement response, including 2 complete responses and 2 complete responses with incomplete blood count recovery (all with AML treated at/below MTD). Increased histone acetylation was observed at all doses. Antioxidant gene expression may confer vorinostat resistance. Further evaluation of vorinostat in AML/MDS is warranted.

• Authors: Guillermo Garcia-Manero, Hui Yang, Carlos Bueso-Ramos, Alessandra Ferrajoli, Jorge Cortes, William G Wierda, Stefan Faderl, Charles Koller, Gail Morris, Gary Rosner, Andrey Loboda, Valeria R Fantin, Sophia S Randolph, James S Hardwick, John F Reilly, Cong Chen, Justin L Ricker, J Paul Secrist, Victoria M Richon, Stanley R Frankel, Hagop M Kantarjian
• Journal: Blood (Blood) Vol. 111 Issue 3 Pg. 1060-6 (Feb 01 2008) ISSN: 0006-4971 [Print] United States
• PMID: 17962510 (Publication Type: Clinical Trial, Phase I, Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Enzyme Inhibitors
• Histone Deacetylase Inhibitors
• Histones
• Hydroxamic Acids
• Vorinostat
• Histone Deacetylases

Topics

• Acetylation
• Adolescent
• Adult
• Aged
• Aged, 80 and over
• Clinical Trials, Phase I as Topic
• Dose-Response Relationship, Drug
• Drug Tolerance
• Drug-Related Side Effects and Adverse Reactions
• Enzyme Inhibitors (therapeutic use)
• Female
• Gene Expression Profiling
• Gene Expression Regulation, Neoplastic
• Histone Deacetylase Inhibitors
• Histone Deacetylases (metabolism)
• Histones (metabolism)
• Humans
• Hydroxamic Acids (administration & dosage, adverse effects, therapeutic use)
• Leukemia (drug therapy, enzymology, genetics, pathology)
• Male
• Middle Aged
• Myelodysplastic Syndromes (drug therapy, enzymology, pathology)
• Neoplasm Staging
• Vorinostat