Doxorubicin Hydrochloride Liposome and Bortezomib in Treating Patients With Refractory Hematologic Cancer or Malignant Solid Tumor or Metastatic Breast Cancer

PS-341 will be administered as an intravenous push into a side arm of either a peripheral or central intravenous line infusing normal saline at 100 ml/hr. Patients will be treated twice weekly for two weeks, followed by a one week rest period, such that the typical days of treatment will be days 1, 4, 8, 11 of each three-week cycle. The initial dose level for PS-341 will be 0.9 mg/m2/dose intravenously, while subsequent dose levels will be determined according to a modified Fibonacci schema

Doxil will be administered at a dose of 30 mg/m2 as a 1 hour infusion through either a peripheral or central intravenous line every 3 weeks (on day 4 of each 21 day cycle)

Velcade will be adminstered intravenously at 1.3 mg/m2 days 1, 4, 8, 11 every 3 weeks