A Phase I, Dose Escalation and Pharmacokinetics Study of Temperature Sensitive Liposome Encapsulated Doxorubicin (ThermoDox™) and Hyperthermia in Patients With Local-Regionally Recurrent Breast Cancer

OBJECTIVES:

• Determine the maximum tolerated dose of temperature-sensitive liposomal doxorubicin (ThermoDox™) when used in combination with local-regional hyperthermia in women with locally recurrent breast cancer.
• Determine the pharmacokinetic profile of ThermoDox™ when used in multiple-course dosing.

OUTLINE: This is a dose-escalation study of temperature-sensitive liposomal doxorubicin (ThermoDox™).

Patients receive ThermoDox™ IV over 30 minutes immediately followed by hyperthermia to the chest wall/axilla over 1-2 hours on day 1. Treatment repeats every 21-35 days for up to 6 courses in the absence of disease progression or unacceptable toxicity.

Cohorts of 3-6 patients receive escalating doses of ThermoDox™ (with or without standard-dose granulocyte colony-stimulating factor [G-CSF] support) until the maximum tolerated dose (MTD) is determined. The MTD without G-CSF support is defined as the dose preceding that at which 2 of 3 or 2 of 6 patients experience dose-limiting toxicity (DLT). At least 6 patients are treated at the MTD. If the only DLT is neutropenia in > 1 of 6 patients treated at any dose level, then additional cohorts of 3-6 patients receive escalating doses of ThermoDox™ with G-CSF support (standard-dose G-CSF or standard-dose pegfilgrastim) until the MTD is determined. The MTD with G-CSF support is defined as the dose preceding that at which 2 of 3 or 2 of 6 patients experience DLT after the addition of G-CSF support.