PMID- 18854394 OWN - NLM STAT- MEDLINE DCOM- 20090212 LR - 20220317 IS - 0021-972X (Print) IS - 0021-972X (Linking) VI - 94 IP - 1 DP - 2009 Jan TI - Lack of therapeutic effect of the histone deacetylase inhibitor vorinostat in patients with metastatic radioiodine-refractory thyroid carcinoma. PG - 164-70 LID - 10.1210/jc.2008-1631 [doi] AB - CONTEXT: Aberrant histone deacetylase activity is seen in a variety of malignancies, and histone deacetylase inhibitors such as vorinostat have been shown to induce cell death and sensitize cells to cytotoxic chemotherapy in thyroid cancer cell lines. This phase II study was undertaken to assess objective response to vorinostat in patients with advanced thyroid cancer. EXPERIMENTAL DESIGN: A total of 19 patients with differentiated thyroid cancer (n = 16) and medullary thyroid cancer (n = 3) were enrolled in the study. Patients received oral vorinostat at a starting dose of 200 mg twice daily, with dose adjustments allowed as necessary for toxicity. Patients were treated for 2 wk, followed by 1 wk off therapy (3-wk cycle) until disease progression or study withdrawal. Responses were measured by Response Evaluation Criteria in Solid Tumors criteria and correlated with tumor markers. RESULTS: No patient achieved a partial or complete response. Median duration of therapy in patients with differentiated thyroid cancer was 17 wk, whereas in medullary thyroid cancer patients it was 25 wk. Reasons for termination included progression of disease by RECIST criteria (n = 7), clinical progression (n = 3), and adverse events (AEs) (n = 9). AEs were primarily grade 1-3; no clinical grade 4 or grade 5 events were observed. Clinical grade 3 AEs consisted of fatigue, dehydration, ataxia, pneumonia, bruises, and deep vein thrombosis. Severe thrombocytopenia was seen in seven patients (grade 3, n = 5; grade 4, n = 2) and was associated with minor bleeding or bruises. CONCLUSIONS: Vorinostat at this dose and schedule is not an effective treatment for advanced thyroid cancer. FAU - Woyach, Jennifer A AU - Woyach JA AD - Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA. FAU - Kloos, Richard T AU - Kloos RT FAU - Ringel, Matthew D AU - Ringel MD FAU - Arbogast, Daria AU - Arbogast D FAU - Collamore, Minden AU - Collamore M FAU - Zwiebel, James A AU - Zwiebel JA FAU - Grever, Michael AU - Grever M FAU - Villalona-Calero, Miguel AU - Villalona-Calero M FAU - Shah, Manisha H AU - Shah MH LA - eng SI - ClinicalTrials.gov/NCT00134043 GR - N01CM62207/CA/NCI NIH HHS/United States GR - U01 CA076576/CA/NCI NIH HHS/United States GR - N01-CM-62207/CM/NCI NIH HHS/United States GR - U01 CA76576/CA/NCI NIH HHS/United States PT - Clinical Trial, Phase II PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20081014 PL - United States TA - J Clin Endocrinol Metab JT - The Journal of clinical endocrinology and metabolism JID - 0375362 RN - 0 (Antineoplastic Agents) RN - 0 (Carcinoembryonic Antigen) RN - 0 (Enzyme Inhibitors) RN - 0 (Histone Deacetylase Inhibitors) RN - 0 (Hydroxamic Acids) RN - 0 (Iodine Radioisotopes) RN - 58IFB293JI (Vorinostat) RN - 9007-12-9 (Calcitonin) RN - 9010-34-8 (Thyroglobulin) SB - IM MH - Adult MH - Aged MH - Antineoplastic Agents/*therapeutic use MH - Calcitonin/blood MH - Carcinoembryonic Antigen/analysis MH - Carcinoma, Medullary/drug therapy/pathology/radiotherapy MH - Enzyme Inhibitors/*therapeutic use MH - Female MH - *Histone Deacetylase Inhibitors MH - Humans MH - Hydroxamic Acids/*therapeutic use MH - Iodine Radioisotopes/*therapeutic use MH - Male MH - Middle Aged MH - Neoplasm Metastasis MH - Thyroglobulin/blood MH - Thyroid Neoplasms/*drug therapy/pathology/radiotherapy MH - Vorinostat PMC - PMC2630867 EDAT- 2008/10/16 09:00 MHDA- 2009/02/13 09:00 PMCR- 2010/01/01 CRDT- 2008/10/16 09:00 PHST- 2008/10/16 09:00 [pubmed] PHST- 2009/02/13 09:00 [medline] PHST- 2008/10/16 09:00 [entrez] PHST- 2010/01/01 00:00 [pmc-release] AID - jc.2008-1631 [pii] AID - 6252 [pii] AID - 10.1210/jc.2008-1631 [doi] PST - ppublish SO - J Clin Endocrinol Metab. 2009 Jan;94(1):164-70. doi: 10.1210/jc.2008-1631. Epub 2008 Oct 14.