Tipifarnib and Sorafenib Tosylate in Treating Patients With Biopsiable Advanced Cancer

PRIMARY OBJECTIVES:

I. To evaluate the safety and toxicity and to determine maximum tolerated dose (MTD) of tipifarnib in combination with sorafenib (sorafenib tosylate).

SECONDARY OBJECTIVES:

I. Preliminary assessment of tipifarnib and sorafenib efficacy (objective response).

II. To determine signaling pathway profiles of patients treated with tipifarnib and sorafenib who are amenable to biopsy by reverse phase protein microarray (RPPA) analysis.

OUTLINE: This is a dose-escalation study of tipifarnib.

Patients receive sorafenib tosylate orally (PO) once daily (QD) or twice daily (BID) on days 1-28 and tipifarnib PO QD or BID on days 1-21. Treatment repeats every 28 days for 12 courses in the absence of disease progression or unacceptable toxicity. Patients may be allowed to continue the treatment after the 12 courses if there is continued clinical response or disease stabilization, and patients do not have significant toxicities.

After completion of study treatment, patients are followed up for 4 weeks.

Inclusion criteria

• Patients must have had =< 4 prior chemotherapy regimens; patients must have advanced cancer that is refractory to standard therapy or for whom there is no standard therapy that increases survival by three months
• Eastern Cooperative Oncology Group (ECOG) performance status =< 2 (Karnofsky >= 60%)
• Life expectancy of greater than 12 weeks
• Leukocytes >= 3,000/mcL
• Absolute neutrophil count >= 1,500/mcL
• Platelets >= 100,000/mcL
• Total bilirubin =< 1.5
• Aspartate aminotransferase (AST) (serum glutamic oxaloacetic transaminase [SGOT])/alanine aminotransferase (ALT) (serum glutamate pyruvate transaminase [SGPT]) =< 2.5 x institutional upper limit of normal
• Creatinine within normal institutional limits OR creatinine clearance >= 60 mL/min/1.73 m^2 for patients with creatinine levels above institutional normal (a calculated creatinine clearance [CrCL] is acceptable)
• International normalized ratio (INR)/prothrombin time (PT) =< within institutional guidelines for biopsy procedures (=< 16 seconds)
• Eligibility of patients receiving any other medications or substances known to affect or with the potential to affect the activity or pharmacokinetics of BAY 43-9006 (sorafenib tosylate) or R115777 (tipifarnib) will be determined following review of their case by the Principal Investigator
• Women of child-bearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry and for the duration of study participation; should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately
• Ability to understand and the willingness to sign a written informed consent document
• Tumor accessible for repeat biopsies

Exclusion criteria

• Patients who have had chemotherapy or radiotherapy within 4 weeks (6 weeks for nitrosoureas or mitomycin C) prior to entering the study or those who have not recovered from adverse events due to agents administered more than 4 weeks earlier
• Patients may not be receiving any investigational agents other than BAY 43-9006 and R115777
• Patients with known brain metastases are excluded except for patients who have had treated brain metastases and are currently not taking anti-seizure medications or steroids
• Patients may not have allergies to imidazoles (e.g., clotrimazole, ketoconazole, miconazole, econazole) or a history of allergic reactions attributed to any other compound of similar chemical or biologic composition to either BAY 43-9006 or R115777
• Uncontrolled hypertension with systolic blood pressure of > 140 mmHg or diastolic pressure > 90 mmHg; however, patients with well-controlled hypertension are eligible
• Patients must not have any evidence of current history of bleeding diathesis
• Patients cannot be on therapeutic anticoagulation; prophylactic anticoagulation therapy (e.g., low-dose warfarin) of venous or arterial access devices is allowed provided that the requirements for prothrombin time (INR; international normalized ratio of prothrombin time) and partial thromboplastin time (PTT) are maintained; patients will be monitored on a weekly basis for the first (1st) cycle of treatment until the INR/PT has stabilized for 2 weeks consecutively; if patients discontinue the R115777 patients will be monitored weekly until INR/PT is stabilized for 2 weeks consecutively
• Patients may not have grade 2 or greater peripheral neuropathy
• Patients with any condition that impairs their ability to swallow pills are excluded
• Patients cannot be receiving enzyme-inducing antiepileptic drugs (EIAEDs) (e.g., phenytoin, carbamazepine, phenobarbital) nor any other cytochrome P450 family 3, subfamily A, polypeptide (CYP3A4) inducer such as rifampin or St. John's wort
• Uncontrolled intercurrent illness including, but not limited to, uncontrolled hypertension, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements
• Patients with a New York Heart Association (NYHA) classification > 2
• Pregnant women are excluded from this study; breastfeeding should be discontinued if the mother is treated with either of these agents
• Human immunodeficiency virus (HIV)-positive patients on combination antiretroviral therapy are ineligible