Lack of correlation between peripheral blood lymphokine-activated killer (LAK) cell function and clinical response in patients with advanced malignant melanoma receiving recombinant interleukin 2.
AffiliationCancer Research Campaign, Paterson Institute for Cancer Research, Christie Hospital, Manchester, UK.
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AbstractA phase-I/II study of recombinant interleukin 2 (rIL-2) was performed in 31 melanoma patients. The first dose of rIL-2 was given intrasplenically followed 4 hr later by an i.v. dose and 3 further i.v. doses on alternate days. Three courses of treatment were planned at 3-week intervals. The maximum tolerated single dose was 11 x 10(6) Cetus U/m2. Haematological and immunological data were available on 20 patients. Post-treatment response to rIL-2 therapy was evident from (i) a rapid depletion of peripheral blood lymphocytes (PBL) with a rebound at 4-7 days (2 times pre-treatment values); (ii) an increase in the number of IL-2 receptor-positive lymphocytes (4-15 times pre-treatment values); (iii) an increase in the number of "positive" patients with cytotoxic (anti-K562) peripheral blood mononuclear cells (PBMC) from 30% to 80%; (iv) amplified killing of K562 by positive patients in relation to pre-treatment values; and (v) the induction of PBMC cytotoxicity (in 45% of patients) against the NK-resistant, LAK-sensitive target, Mel I. Partial clinical responses to rIL-2 treatment were observed in 4 patients, but these were not reflected in the PBMC LAK activity or the other parameters examined.
CitationLack of correlation between peripheral blood lymphokine-activated killer (LAK) cell function and clinical response in patients with advanced malignant melanoma receiving recombinant interleukin 2. 1989, 43 (3):410-4 Int. J. Cancer
JournalInternational Journal of Cancer
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