FLT-PET in Predicting Response to Chemotherapy in Patients With Advanced Malignancies

PRIMARY OBJECTIVES:

I. To determine if concurrent treatment with temsirolimus and bevacizumab demonstrates a dose-dependent decrease in FLT-PET standardized uptake value which correlates with clinical response.

SECONDARY OBJECTIVES:

I. To determine the relationship between FLT-PET and markers of angiogenesis and drug activity in tumor biopsy, along with surrogate peripheral blood markers of target inhibition and drug activity.

OUTLINE:

Patients undergo fluorine F-18 fluorothymidine PET at baseline, at day 6-8 of course 1, day 20 of course 2, and prior to day 1 of course 3.

Inclusion criteria

• Patients actively enrolled and being treated on protocol 2007-0668: Combination Therapy with Bevacizumab and Temsirolimus in Patients with Advanced Malignancy at M.D. Anderson Cancer Center; these patients must have met the inclusion and exclusion criteria for that protocol
• Women of child-bearing potential (as defined as women who are not post-menopausal for 12 months or who have had no previous surgical sterilization) and men must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry, for the duration of study participation, and for 90 days after the last dose
• Ability to understand and the willingness to sign a written informed consent document
• Patient actively enrolled and being treated on protocol 2012-0061 "A Phase I Trial of Bevacizumab, Temsirolimus Alone and in Combination with Valproic Acid or Cetuximab in Patients with Advanced Malignancy" at M.D. Anderson Cancer Center

Exclusion criteria

• Pregnant or breast-feeding women
• History of hypersensitivity to 3'-deoxy-3'-18F-fluorothymidine (18F-FLT) or any component of the formulation