Abstract
Infusion of highly heterogeneous populations of autologous tumor-infiltrating lymphocytes (TILs) can result in tumor regression of exceptional duration. Initial tumor regression has been associated to persistence of TILs shortly after infusion, but it is currently not clear whether a single infusion of TILs can establish long term memory antitumor responses.
Highlights
Infusion of highly heterogeneous populations of autologous tumor-infiltrating lymphocytes (TILs) can result in tumor regression of exceptional duration
In order to characterize the long term fate of the infused tumor-reactive TILs and their attributes, we performed a longitudinal multidimension analysis of samples from 28 patients with metastatic melanoma treated in the trial NCT00937625 (TILs after lymphodepletion and followed by IL-2)
Frequency of T cell subpopulations and tumor recognition capacity of peripheral blood lymphocytes (PBLs) obtained shortly (1 week to 1 month) after infusion closely mirrored the characteristics of TILs infused in the individual patients
Summary
Infusion of highly heterogeneous populations of autologous tumor-infiltrating lymphocytes (TILs) can result in tumor regression of exceptional duration. Initial tumor regression has been associated to persistence of TILs shortly after infusion, but it is currently not clear whether a single infusion of TILs can establish long term memory antitumor responses
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