APN401 in Treating Patients With Recurrent or Metastatic Pancreatic Cancer, Colorectal Cancer, or Other Solid Tumors That Cannot Be Removed by Surgery

PRIMARY OBJECTIVES: I. To determine the toxicities and establish the safety of multiple infusions of small interfering ribonucleic acid (siRNA)-transfected peripheral blood mononuclear cells APN401 (APN401). SECONDARY OBJECTIVES: I. To determine the immunologic effects of multiple infusions of APN401. II. To document clinical response and survival. OUTLINE: Patients receive siRNA-transfected peripheral blood mononuclear cells APN401 intravenously (IV) over 30 minutes on days 1, 29, and 57 in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up for 5 years.