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BESSER, Michal J; SHAPIRA-FROMMER, Ronnie; SHALMON, Bruria; HARDAN, Izhar; CATANE, Raphael; MARKEL, Gal; APTER, Sara; BEN-NUN, Alon; KUCHUK, Iryna; SHIMONI, Avichai; NAGLER, Arnon; SCHACHTER, Jacob; TREES, Avraham J; ZIPPEL, Dov; ITZHAKI, Orit; HERSHKOVITZ, Liat; LEVY, Daphna; KUBI, Adva; HOVAV, Einat; CHERMOSHNIUK, Natalia
Clinical cancer research, 05/2010, Volume: 16, Issue: 9Journal Article
Adoptive cell therapy with autologous tumor-infiltrating lymphocytes (TIL) has shown promising results in metastatic melanoma patients. Although objective response rates of over 50% have been reported, disadvantages of this approach are the labor-intensive TIL production and a very high drop-out rate of enrolled patients, limiting its widespread applicability. Previous studies showed a clear correlation between short TIL culture periods and clinical response. Therefore, we used a new TIL production technique using unselected, minimally cultured, bulk TIL (Young-TIL). The use of Young-TIL is not restricted to human leukocyte antigen (HLA)-A2 patients. The purpose of this study is to explore the efficacy and toxicity of adoptively transferred Young-TIL following lympho-depleting chemotherapy in metastatic melanoma patients, refractory to interleukin-2 and chemotherapy. Young-TIL cultures for 90% of the patients were successfully generated, enabling the treatment of most enrolled patients. We report here the results of 20 evaluated patients. Fifty percent of the patients achieved an objective clinical response according to the Response Evaluation Criteria in Solid Tumors, including two ongoing complete remissions (20+, 4+ months) and eight partial responses (progression-free survival: 18+, 13+, 10+, 9, 6+, 4, 3+, and 3 months). All responders are currently alive. Four additional patients showed disease stabilization. Side effects were transient and manageable. We showed that lympho-depleting chemotherapy followed by transfer of short-term cultured TIL can mediate tumor regression in 50% of metastatic melanoma with manageable toxicity. The convincing clinical results combined with the simplification of the process may thus have a major effect on cell therapy of cancer.
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