AZD6244 With Cetuximab for Solid Tumors and Colorectal Cancer

Colon Cancer Clinical Trial

Official title: A Phase 1 Study of AZD6244 in Combination With Cetuximab in Refractory Solid Tumors

Status Completed

Clinical Trial Summary

Background:

• The experimental cancer treatment drug AZD6244 has been shown to block signals that tell cancer cells to grow. Cetuximab, a drug approved to treat cancer of the head, neck, colon, and rectum, also blocks signals that tell cancer cells to grow. Researchers are investigating the highest safe dose of AZD6244 to give with cetuximab, and will also investigate the effectiveness of this drug combination in individuals who have colorectal cancer that involves a particular protein known as the K-RAS protein. Cetuximab is not used to treat colorectal cancer with K-RAS tumors because it has not been shown to be effective, but researchers believe that adding AZD6244 to cetuximab may improve how well cetuximab works, even in people with K-RAS tumors.

Objectives:

• To evaluate the safety and effectiveness of AZD6244 in combination with cetuximab for solid tumors that have not responded to standard treatment.

• To evaluate the safety and effectiveness of AZD6244 in combination with cetuximab for colorectal cancer that involves the K-RAS protein and has not responded to standard treatment.

Eligibility:

• Individuals at least 18 years of age who have been diagnosed with solid tumors that have not responded to standard treatment.

• Individuals at least 18 years of age who have been diagnosed with colorectal cancer that has not responded to standard treatment.

Design:

• This protocol will involve two separate studies: an initial study to establish the highest safe and effective dose of AZD6244 and cetuximab in individuals with solid tumors, and an expansion study of AZD6244 and cetuximab in individuals with colorectal cancer involving the K-RAS protein.

• Participants will be screened with a full medical history and physical examination, blood samples, imaging studies, and other tests as required by the researchers.

• AZD6244 is a capsule to be swallowed once or twice a day, every day, with water on an empty stomach. Cetuximab will be given intravenously once a week, over 2 hours for the first dose and over an hour for every following dose. This combination of daily AZD6244 and weekly cetuximab will be repeated in 28-day cycles of treatment. Participants will keep a diary to record the time of taking AZD6244 each day, as well as any side effects.

• Participants will have frequent blood tests and other exams during the first cycle of treatment, up to five visits to the National Institutes of Health (NIH) and other visits to their local doctor to in the first 28-day cycle.

• During subsequent cycles, participants will have four visits to NIH and four visits to your local doctor for examinations, blood tests, and imaging studies.

• Participants may continue to receive the AZD6244 with cetuximab for up to 6 cycles, until the tumor grows, unacceptable side effects development, or the participant or participant's doctor decides to stop participation. There will be a final study visit that repeats the procedures performed during the screening visit....

Clinical Trial Description

Background:

• AZD6244 is an oral highly selective and potent uncompetitive inhibitor of mitogen-activated protein kinase 1/2 (MEK1/2).

• The presence of KRAS mutations predict resistance to EGFR-directed antibody therapy of metastatic colorectal cancer. This appears secondary to KRAS activation of signaling cascades downstream of the EGFR receptor, including the RAF/MEK/ERK pathway.

• Our hypothesis is that EGFR inhibition by cetuximab would be augmented in patients with KRAS mutations if activation of the RAF/MEK/ERK cascade were to be inhibited.

Objectives:

• To determine the dose limiting toxicities and the maximum tolerated dose of AZD6244 in combination with cetuximab in advanced, refractory solid tumors.

• To assess for evidence of anti-tumor activity with this combination, per tumor measurements using RECIST criteria.

• To evaluate the pharmacokinetics of AZD6244 and cetuximab when administered concomitantly.

• To evaluate the safety and tolerability of the combination of AZD6244 and cetuximab in patients with K-RAS mutated metastatic colorectal cancer.

• To assess the inhibition of the RAF/MEK/ERK pathway in peripheral blood mononuclear cells secondary to treatment with AZD6244.

• To evaluate the pharmacokinetics of AZD6244 in combination with cetuximab and the relation to treatment side effects.

Eligibility:

• Patients must have histologically confirmed malignancy that is metastatic or unresectable and for which standard curative or palliative measures do not exist or are no longer effective. In the MTD expansion cohort: Patients must have biopsy proven K-RAS mutant, metastatic colorectal cancer.

• Age greater than or equal to 18

• ECOG performance status less than or equal to 2

Study Design:

• This is a phase 1 dose escalation study of AZD6244 in combination with fixed-dose cetuximab with an expanded cohort in K-RAS mutated metastatic colorectal cancer.

• Patients will be treated with AZD6244 orally twice daily continuously, and cetuximab will be administered at standard doses on days 1, 8, 15 and 22. Dose escalations are outlined per the schema in the parent protocol.

• The dose of AZD6244 will be escalated using a 3-patient cohort design based on first cycle toxicities until dose limiting toxicities (DLT) and maximum tolerated dose (MTD) are defined. Once the MTD/RP2D has been identified, an additional 12 patients with K-RAS mutant colorectal cancer will be enrolled at that dose level, in an effort to more fully characterize pharmacokinetic characteristics of this combination. If at least an 8% response rate is observed in the expanded cohort, the combination will be recommended for future analysis. ;

Related Conditions & MeSH terms

• Cancer of the Colon
• Colon Cancer
• Colon Neoplasms
• Colonic Cancer
• Colonic Neoplasms
• Neoplasms

• NCT number: NCT01287130
• Study type: Interventional
• Source: National Institutes of Health Clinical Center (CC)
• Status: Completed
• Phase: Phase 1
• Start date: January 7, 2011
• Completion date: August 27, 2013