S0727 Gemcitabine Hydrochloride and Erlotinib Hydrochloride With or Without Monoclonal Antibody Therapy in Treating Patients With Metastatic Pancreatic Cancer That Cannot Be Removed By Surgery

PRIMARY OBJECTIVES:

I. To assess the appropriate dose of IMC-A12 (cixutumumab) to use in combination with gemcitabine (gemcitabine hydrochloride) and erlotinib (erlotinib hydrochloride). (Phase I) II. To assess progression-free survival in patients with metastatic pancreatic cancer treated with IMC-A12 plus gemcitabine and erlotinib compared to those treated with gemcitabine plus erlotinib alone. (Phase II) III. To assess overall survival in each of the two treatment arms in this group of patients. (Phase II) IV. To assess the total response probability (confirmed and unconfirmed, complete and partial responses) in each of the two treatment arms in the subset of this group of patients with measurable disease. (Phase II) V. To assess the qualitative and quantitative toxicities in each of the two treatment arms in this group of patients. (Phase II)

OUTLINE: This is a multicenter, phase I, dose-escalation study of cixutumumab followed by a randomized, phase II study.

Patients are initially enrolled into the phase I portion of the study to determine the recommended phase II dose (RPTD) of cixutumumab. Once the RPTD is determined, patients are enrolled into the phase II portion of the study.

PHASE I (LIMITED INSTITUTIONS): Patients receive erlotinib hydrochloride orally (PO) once daily on days 1-28, gemcitabine hydrochloride intravenously (IV) over 30 minutes on days 1, 8, and 15, and cixutumumab IV over 60 minutes on days 1, 8, 15, and 22. Treatment repeats every 28 days in the absence of disease progression or unacceptable toxicity.

PHASE II (ALL SWOG MEMBERS): Patients are randomized to 1 of 2 treatment arms.

ARM I: Patients receive erlotinib hydrochloride, gemcitabine hydrochloride, and cixutumumab at the RPTD as in phase I.

ARM II: Patients receive erlotinib hydrochloride and gemcitabine hydrochloride as in arm I.

In both arms, treatment repeats every 28 days in the absence of disease progression or unacceptable toxicity.

Previously collected tumor tissue is obtained for gene expression analyses by RT-PCR, RNA isolation, and cDNA synthesis. Blood samples are collected periodically for correlative studies. Samples are assessed for the potential relationship between gene expression levels, germline polymorphisms, Ras and P13K mutations and progression-free survival and overall survival.

After completion of study treatment, patients are followed every 6 months for up to 3 years.

Inclusion criteria

• Histologically or cytologically confirmed pancreatic adenocarcinoma

• Stage IV disease (any T, any N, M1 [distant metastases])
• Unresectable disease
• Histologic diagnosis based on a metastatic site must be compatible with pancreatic cancer
• Measurable and/or nonmeasurable disease
• No endocrine or neuroendocrine tumors, lymphoma of the pancreas, or ampullary cancer
• No macroscopic residual disease post-resection as the only site of disease
• No clinically significant ascites
• No known brain metastases

• Patients with neurologic signs or symptoms must undergo brain imaging studies AND studies must be negative for disease
• Zubrod performance status 0-1
• ANC ≥ 1,500/mcL
• Platelet count ≥ 100,000/mcL
• Hemoglobin ≥ 9 g/dL
• Leukocytes ≥ 3,000/mcL
• Total bilirubin normal
• SGOT or SGPT ≤ 2.5 times upper limit of normal (ULN)
• Serum creatinine ≤ 1.5 times ULN OR creatinine clearance ≥ 60 mL/min
• Fasting serum glucose < 120 mg/dL or below the ULN

• Patients with diabetes mellitus who meet this criterion must be on a stable dietary or therapeutic regimen for this condition
• INR ≤ 1.5 and PTT ≤ 5 seconds above ULN
• Not pregnant or nursing
• Fertile patients must use effective contraception
• Willing to submit previously collected tumor tissue specimens
• No history of allergic reaction attributed to compounds of similar chemical or biological composition to anti-IGF-1R recombinant monoclonal antibody IMC-A12
• No active acute or chronic infections requiring antibiotics
• No significant ongoing cardiac problems, including any of the following:

• Myocardial infarction within the past 6 months
• Uncontrolled hypertension
• Unstable angina
• Uncontrolled arrhythmia
• Congestive heart failure
• No known HIV infection
• No other prior malignancy, except for the following:

• Adequately treated basal cell or squamous cell skin cancer
• Carcinoma in situ of the cervix
• Adequately treated stage I or II cancer from which the patient is currently in complete remission
• Any other cancer from which the patient has been disease-free for 5 years
• At least 14 days since prior surgery
• At least 28 days since prior radiotherapy for palliation to metastatic sites

• Patient must have other untreated metastatic sites that would qualify them for this protocol
• At least 6 months since prior adjuvant chemotherapy
• No prior chemotherapy, hormonal therapy, immunotherapy, or chemoradiotherapy for advanced or locally advanced pancreatic cancer, including drugs that target either EGFR or IGFR
• No plans to receive concurrent chemotherapy, hormonal therapy, radiotherapy, immunotherapy, or any other type of therapy for treatment of cancer
• No prior gemcitabine hydrochloride
• No prior chimerized or murine monoclonal antibody therapy
• No concurrent CYP3A4 inducers including, but not limited to, any of the following:

• Rifampicin
• Rifabutin
• Rifapentine
• Phenytoin
• Carbamazepine
• Phenobarbital
• Hypericum perforatum (St. John's wort)
• No concurrent CYP3A4 inhibitors including, but not limited to, any of the following:

• Atazanavir
• Clarithromycin
• Indinavir
• Itraconazole
• Ketoconazole
• Nefazodone
• Nelfinavir
• Ritonavir
• Saquinavir
• Telithromycin
• Troleandomycin
• Voriconazole
• Concurrent prophylactic low-dose coumadin or low molecular weight heparin allowed provided coagulation criteria are met
• Full-dose anticoagulation allowed provided coagulation criteria are met and are under strict control and monitoring