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    In: Journal of Clinical Oncology, American Society of Clinical Oncology (ASCO), Vol. 31, No. 15_suppl ( 2013-05-20), p. 9094-9094
    Abstract: 9094 Background: MET and VEGF signaling are implicated in angiogenesis, invasion, and metastasis, and upregulation of MET as a consequence of GNAQ/GNA11 mutation has been implicated in uveal melanoma. Historical rates of median overall survival (OS) in patients (pts) with metastatic uveal melanoma range from 6-9 months (mos). A RDT evaluated activity and safety of cabozantinib, a MET and VEGFR2 inhibitor, in 9 tumor types including a metastatic melanoma cohort where 55% and 5% of pts experienced objective tumor regression and confirmed partial response, respectively (J. Clin. Oncol. 30, 2012 (suppl; abstr. 8531)). Here we report on the longer term followup of metastatic uveal melanoma pts enrolled to this cohort. Methods: Eligible pts were required to have progressive measurable disease per RECIST. Pts received cabozantinib at 100 mg po qd over a 12 wk Lead-in stage. Tumor response (mRECIST) was assessed q6 wks. Treatment ≥ wk 12 was based on response: pts with PR continued open-label cabozantinib, pts with SD were randomized to cabozantinib vs placebo, and pts with PD discontinued. Pts were followed for overall survival. Results: 23 of 77 pts enrolled in the melanoma cohort had the uveal subtype. Median age was 65 yrs; median prior regimens was 1 (range 0-5). Tumor mutation status was determined for 10/23 pts. 9/10 harbored either a GNAQ or GNA11 mutation, while GNA11 status was unknown for one pt. Pts had substantial tumor burden; median sum of the longest diameter of target lesions was 11.9 cm (range, 2-37.2). Median follow-up was 26.5 mos. (range 21.7-33.8). Median PFS from Study Day 1 was 4.8 mos. The estimate of PFS at month 6 (PFS6) was 41% and median OS was 12.6 mos. Most common Grade 3/4 AEs were HTN (13%), abdominal pain (9%), hypokalaemia (9%), hyperbilirubinaemia (9%) and increased lipase (9%). Conclusions: Cabozantinib is active in pts with metastatic uveal melanoma. Treatment with cabozantinib is associated with encouraging progression-free and overall survival. The safety profile of cabozantinib was comparable to that of other VEGFR TKIs. A randomized Phase 2 study is planned comparing cabozantinib to temozolomide plus dacarbazine in pts with uveal melanoma. Clinical trial information: NCT00940225.
    Type of Medium: Online Resource
    ISSN: 0732-183X , 1527-7755
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Clinical Oncology (ASCO)
    Publication Date: 2013
    detail.hit.zdb_id: 2005181-5
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