NCIt definition : A population of tumor-infiltrating lymphocytes (TILs) harvested from a patient and
transduced with a retroviral vector encoding the gene for interleukin-2 (IL-2). TILs
require IL-2 to sustain them when they are transferred back to the patient. By inserting
the IL-2 gene into TILs in vitro so that TILs express IL-2 continuously it is possible
to provide TIL-sustaining IL-2 in vivo specifically at the site of lymphocyte infiltration,
thereby avoiding the toxicity associated with the systemic administration of IL-2.
(NCI04);