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About
RATIONALE: Everolimus may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth and by blocking blood flow to the tumor.
PURPOSE: This phase II trial is studying how well everolimus works in treating patients with advanced or metastatic colorectal cancer that did not respond to previous therapy.
Full description
OBJECTIVES:
OUTLINE: This is an open-label study.
Patients receive oral everolimus once daily on days 1-28. Treatment repeats every 28 days in the absence of disease progression or unacceptable toxicity.
Patients undergo tumor biopsies and normal skin biopsies at baseline and after the first course of study treatment. Tumor tissue is examined for biological markers (e.g., epidermal growth factor receptor, ERK, Akt, p70s6k, p27, and Rb protein) by immunohistochemistry; apoptosis quantification by TUNEL assay; Ki-67 quantification and Ki-index; gene expression; and c-fos and p27 expression by reverse-transcriptase polymerase chain reaction.
PROJECTED ACCRUAL: A total of 37 patients will be accrued for this study.
Enrollment
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Inclusion and exclusion criteria
DISEASE CHARACTERISTICS:
Cytologically or pathologically confirmed colorectal adenocarcinoma
Refractory to ≥ 1 line of prior therapy
Mutations in the PI3K gene in tumor tissue
Tumor tissue available for genetic testing OR willing to undergo baseline tumor biopsy
Measurable lesion with ≥ 1 diameter ≥ 2 cm by conventional CT scan (1 cm by spiral CT scan) in a nonirradiated area
No known brain metastases
PATIENT CHARACTERISTICS:
ECOG performance status (PS) 0-2 OR Karnofsky PS 60-100%
Life expectancy > 12 weeks
WBC ≥ 3,000/mm³
Absolute neutrophil count ≥ 1,500/mm³
Platelet count ≥ 100,000/mm³
Bilirubin normal
AST and ALT ≤ 2.5 times upper limit of normal (ULN)
Creatinine normal OR creatinine clearance ≥ 60 mL/min
Cholesterol and triglycerides ≤ 2.5 times ULN
Not pregnant or nursing
Negative pregnancy test
Fertile patients must use effective contraception
No history of allergic reactions attributed to compounds of similar chemical or biologic composition to everolimus
No uncontrolled intercurrent illness, including, but not limited to, any of the following:
No evidence of bleeding diathesis
Able to swallow tablets
PRIOR CONCURRENT THERAPY:
See Disease Characteristics
At least 4 weeks since prior radiotherapy or chemotherapy (6 weeks for nitrosoureas or mitomycin C) and recovered
No prior targeted therapy against mTOR
No other concurrent investigational agents
No concurrent therapeutic anticoagulation
No concurrent combination antiretroviral therapy for HIV-positive patients
No other concurrent anticancer therapy, including chemotherapy, hormonal therapy, immunotherapy, alternative therapy, or radiotherapy
No concurrent live vaccination
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Data sourced from clinicaltrials.gov
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