PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-1 Life expectancy: At least 12 weeks Hematopoietic: Absolute neutrophil count at least 1,500/mm3 Platelet count at least 75,000/mm3 Hemoglobin at least 10 g/dL Hepatic: Bilirubin no greater than 3 times upper limit of normal (ULN) AST/ALT less than 3 times ULN Renal: Creatinine no greater than 2 times ULN Cardiovascular: No New York Heart Association class III or IV heart disease No history of angina Other: Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception HIV negative No uncontrolled infection No autoimmune related phenomena No peptic ulcer disease