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-Phase 3 Pivotal Trial of Cabozantinib in Metastatic Castration-Resistant Prostate Cancer-
COMET-1 is a randomized, double-blind, placebo-controlled trial designed to enroll 960 patients with mCRPC who have previously been treated with docetaxel, abiraterone acetate and/or enzalutamide. All patients in the trial have bone metastases and there is no limit to the number or type of prior treatments. Patients are randomized 2:1 to receive cabozantinib (60 mg daily) or prednisone (5 mg twice daily). The trial is event-driven and has 90% power to detect a 25% reduction in the risk of death (HR = 0.75) at the time of final analysis, which requires 578 events. A single interim analysis after 387 events is also planned and will assess if the trial achieved its primary endpoint; it will not include a futility analysis. The secondary endpoint of the trial is bone scan response as assessed by an independent radiology facility (IRF).
“Reaching the COMET-1 enrollment target is a significant milestone for
the cabozantinib clinical development program,” said Michael M.
Morrissey, Ph.D., president and chief executive officer of
COMET-1 is one of two ongoing company-sponsored pivotal trials of cabozantinib in mCRPC. The second trial, COMET-2, is a randomized, double-blind, placebo-controlled phase 3 trial evaluating cabozantinib’s ability to reduce pain associated with bone metastases. COMET-2 continues to enroll patients, and more information on the trial can be found at www.cometclinicaltrials.com or www.clinicaltrials.gov/ct2/show/NCT01522443. Recently initiated phase 3 pivotal trials of cabozantinib in metastatic renal cell carcinoma and advanced hepatocellular carcinoma are also actively recruiting patients.
Cabozantinib inhibits the activity of tyrosine kinases including RET,
MET and VEGFR2. These receptor tyrosine kinases are involved in both
normal cellular function and in pathologic processes such as
oncogenesis, metastasis, tumor angiogenesis, and maintenance of the
tumor microenvironment. COMETRIQ® (cabozantinib) is currently approved
Cobimetinib (GDC-0973/XL518) is a potent, highly selective inhibitor of MEK, a serine/threonine kinase that is a component of the RAS/RAF/MEK/ERK pathway. This pathway mediates signaling downstream of growth factor receptors, and is prominently activated in a wide variety of human tumors. In preclinical studies, oral dosing of cobimetinib results in potent and sustained inhibition of MEK in RAS or B-RAF mutant tumor models, and results in significant tumor regression at well-tolerated doses. Cobimetinib was designed to have low penetration into the brain with the aim of minimizing the potential for the CNS side effects reported with previous MEK inhibitors.
Cobimetinib is being developed by Genentech/
COMETRIQ® Important Safety Information, including Boxed Warning
WARNING: PERFORATIONS AND FISTULAS, and HEMORRHAGE
- Serious and sometimes fatal gastrointestinal perforations and fistulas occur in COMETRIQ-treated patients.
- Severe and sometimes fatal hemorrhage occurs in COMETRIQ-treated patients.
- COMETRIQ treatment results in an increase in thrombotic events, such as heart attacks.
- Wound complications have been reported with COMETRIQ.
- COMETRIQ treatment results in an increase in hypertension.
- Osteonecrosis of the jaw has been observed in COMETRIQ-treated patients.
- Palmar-Plantar Erythrodysesthesia (PPE) Syndrome occurs in patients treated with COMETRIQ.
- The kidneys can be adversely affected by COMETRIQ. Proteinuria and nephrotic syndrome have been reported in patients receiving COMETRIQ.
- Reversible Posterior Leukoencephalopathy Syndrome has been observed with COMETRIQ.
- COMETRIQ is not recommended for use in patients with moderate or severe hepatic impairment.
- COMETRIQ can cause fetal harm when administered to a pregnant woman.
Adverse Reactions – The most commonly reported adverse drug reactions (≥25%) are diarrhea, stomatitis, palmar-plantar erythrodysesthesia syndrome (PPES), decreased weight, decreased appetite, nausea, fatigue, oral pain, hair color changes, dysgeusia, hypertension, abdominal pain, and constipation. The most common laboratory abnormalities (≥25%) are increased AST, increased ALT, lymphopenia, increased alkaline phosphatase, hypocalcemia, neutropenia, thrombocytopenia, hypophosphatemia, and hyperbilirubinemia.
Drug Interactions – COMETRIQ is a CYP3A4 substrate. Co-administration of strong CYP3A4 inhibitors can increase cabozantinib exposure. Chronic co-administration of strong CYP3A4 inducers can reduce cabozantinib exposure.
For full prescribing information, including Boxed Warning, please visit www.COMETRIQ.com.
This press release contains forward-looking statements, including,
without limitation, statements related to: the importance of, and
designs, plans and goals for, the COMET-1 and COMET-2 trials, and the
timing (including for the readout of top-line data) and potential
success thereof; the belief that reaching the COMET-1 enrollment target
is a significant milestone for the cabozantinib clinical development
program; the belief that 2014 will be an important year for
Charles Butler, 650-837-7277
Investor Relations and