PMID- 25102375 OWN - NLM STAT- MEDLINE DCOM- 20150615 LR - 20211021 IS - 1557-9077 (Electronic) IS - 1050-7256 (Print) IS - 1050-7256 (Linking) VI - 24 IP - 10 DP - 2014 Oct TI - A phase I study of cabozantinib (XL184) in patients with differentiated thyroid cancer. PG - 1508-14 LID - 10.1089/thy.2014.0125 [doi] AB - BACKGROUND: Cabozantinib targets tyrosine kinases including MET, vascular endothelial growth factor (VEGF) receptor 2, and rearranged during transfection (RET). Differentiated thyroid cancer (DTC) is a tumor type that may be sensitive to cabozantinib. Therefore, we evaluated cabozantinib in a cohort of heavily pretreated patients with metastatic DTC. METHODS: This single-arm open-label phase I trial assessed the safety, tolerability, and antitumor activity of cabozantinib in DTC patients taking part in a drug-drug interaction study. Adult patients with histologically confirmed metastatic or surgically unresectable DTC (including papillary, follicular, or Hurthle cell) were enrolled. Patients received daily oral dosing of 140 mg cabozantinib. Safety was assessed by evaluation of adverse events (AEs), vital signs, electrocardiograms, laboratory tests, and concomitant medications. Tumor response by magnetic resonance imaging or computed tomography scan was investigator assessed using Response Evaluation Criteria In Solid Tumors (RECIST) v1.0. RESULTS: The study enrolled 15 patients who had failed standard radioactive iodine therapy. Patients had received a median of two prior systemic agents, and 11 patients (73%) had previously received at least one VEGF pathway inhibiting therapy. Common AEs included diarrhea, nausea, fatigue, and decreased appetite. Partial response was reported in eight patients (53%). Median progression-free survival and median overall survival were not reached. CONCLUSIONS: Cabozantinib demonstrates a safety profile similar to other multitargeted VEGFR inhibitors in advanced DTC patients. The antitumor activity observed in this study warrants further investigation of cabozantinib in patients with advanced DTC. FAU - Cabanillas, Maria E AU - Cabanillas ME AD - 1 Department of Endocrine Neoplasia and Hormonal Disorders, The University of Texas M.D. Anderson Cancer Center , Houston, Texas. FAU - Brose, Marcia S AU - Brose MS FAU - Holland, Jaymes AU - Holland J FAU - Ferguson, Kimberly C AU - Ferguson KC FAU - Sherman, Steven I AU - Sherman SI LA - eng GR - UL1 TR000371/TR/NCATS NIH HHS/United States GR - P30CA016672/CA/NCI NIH HHS/United States PT - Clinical Trial, Phase I PT - Journal Article PT - Multicenter Study PT - Research Support, N.I.H., Extramural DEP - 20140827 PL - United States TA - Thyroid JT - Thyroid : official journal of the American Thyroid Association JID - 9104317 RN - 0 (Anilides) RN - 0 (Antineoplastic Agents) RN - 0 (Protein Kinase Inhibitors) RN - 0 (Pyridines) RN - 1C39JW444G (cabozantinib) SB - IM MH - Administration, Oral MH - Adult MH - Aged MH - Anilides/administration & dosage/adverse effects/*therapeutic use MH - Antineoplastic Agents/administration & dosage/adverse effects/*therapeutic use MH - Carcinoma/*drug therapy/enzymology/mortality/secondary MH - *Cell Differentiation MH - Disease-Free Survival MH - Drug Administration Schedule MH - Humans MH - Kaplan-Meier Estimate MH - Magnetic Resonance Imaging MH - Male MH - Middle Aged MH - Protein Kinase Inhibitors/administration & dosage/adverse effects/*therapeutic use MH - Pyridines/administration & dosage/adverse effects/*therapeutic use MH - Thyroid Neoplasms/*drug therapy/enzymology/mortality/pathology MH - Time Factors MH - Tomography, X-Ray Computed MH - Treatment Outcome MH - United States PMC - PMC4195402 EDAT- 2014/08/08 06:00 MHDA- 2015/06/16 06:00 PMCR- 2014/10/01 CRDT- 2014/08/08 06:00 PHST- 2014/08/08 06:00 [entrez] PHST- 2014/08/08 06:00 [pubmed] PHST- 2015/06/16 06:00 [medline] PHST- 2014/10/01 00:00 [pmc-release] AID - 10.1089/thy.2014.0125 [pii] AID - 10.1089/thy.2014.0125 [doi] PST - ppublish SO - Thyroid. 2014 Oct;24(10):1508-14. doi: 10.1089/thy.2014.0125. Epub 2014 Aug 27.