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Abstract
The purpose of this study was to examine the production of IL-1β, IL-6 and TNF-α by peripheral blood mononuclear cells in patients with renal cell carcinoma treated with recombinant interleukin 2 (rIL-2). Peripheral blood mononuclear cells (PBMC) were purified from blood samples obtained six times during therapy and the production of IL-1β, IL-6 and TNF-α were determined after 18 h culture of the PBMC in culture medium or in medium containing 10 μg lipopolysaccharide (LPS)/ml, 10 ng LPS/ml or 1000 units rIL-2/ml. In vivo therapy with rIL-2 resulted in substantial changes in the production of the three cytokines. Only the production of TNF-α following in vitro stimulation with rIL-2 was related to the clinical response, being significantly lower in responding patients than in non-responders ( P < 0.05). These findings suggest that the rIL-2-induced TNF-α production of PBMC in vitro is lower in renal cancer patients that respond to rIL-2 therapy than in non-responding patients.
Published Version
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