Abstract
Seven patients with metastatic colorectal cancer have been treated with a regimen involving an 120-hour continuous infusion of rIL-2, 3 × 10 6 μ/m 2. Entry restrictions included a Karnofsky index of ⩾80%, and a measurable lesion. One patient died of peritonitis secondary to bowel perforation at the site of the unresected tumour. One patient abandoned treatment following a pulmonary embolism during the first rIL-2 infusion. Other side effects included, pyrexia, rigors, nausea, hypotension, oliguria, weight gain, thrombocytopenia, neuropsychiatric symptoms and prerenal renal failure. Two patients have shown a greater than 50% regression in the size of their tumours and 3 have stable disease. The use of ‘humanized’ monoclonal antibodies together with mononuclear cells from patients receiving IL-2 infusions may provide a useful way of killing tumour cells which are resistant to lysis by LAK cells.
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