An Open Label, Multiple-Dose, Sequential Dose-Escalation Study of NBI-3001 in Patients With Recurrent or Unresponsive Solid Tumors Known to Over-Express IL-4 Receptors

OBJECTIVES:

• Determine the maximum tolerated dose of interleukin-4 PE38KDEL cytotoxin in patients with recurrent or unresponsive, metastatic renal cell, non-small cell lung, or breast cancer that overexpresses interleukin-4 receptors.
• Determine the qualitative and quantitative toxic effects of this drug, including the duration and intensity of these toxic effects, in these patients.
• Determine the pharmacokinetic behavior of this drug in these patients.
• Determine the antibody response (if any) in patients treated with this drug.
• Determine, in a preliminary manner, the antitumor activity of this drug in these patients.

OUTLINE: This is a dose-escalation, multicenter study.

Patients receive interleukin-4 PE38KDEL cytotoxin (NBI-3001) IV over 10 minutes once daily on days 1-5. Treatment repeats every 28 days in the absence of disease progression, unacceptable toxicity, or detection of neutralizing antibodies.

Cohorts of 3-6 patients receive escalating doses of NBI-3001 until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose preceding that at which at least 2 of 3 or 2 of 6 patients experience dose-limiting toxicity.