(1) Analysis of lymphocyte subsets by flow cytometry demonstrated Leu 4, 43.6% (T cells); Leu 10, 10.5% (B cells) and Leu 7, 13.1% (natural killer (NK) cells) in TIL.
(2) With one exception none of the purified CD4+ or CD8+ TILs expressed any significant levels of CD56, while the unseparated TILs contained varying numbers of CD3+CD56+ and CD3-CD56+ populations.
(3) Furthermore, it was also confirmed that TIL-LAK cells could be induced in autochthonous mouse tumor systems and human gastric tumor systems.
(4) However, IL-4 did not alter the cytotoxic activity of TILs against autologous tumor cells and established tumor cell lines.
(5) I'm here to defend her 'til the end even if they put me in jail."
(6) PFP immunoreactivity in human peripheral blood lymphocytes (PBL) and tumour infiltrating lymphocytes (TIL) was investigated immunocytochemically with the aid of an anti-PFP monoclonal antibody.
(7) TIL grown in the presence of IL-4 significantly reduced the level of non-specific, non-major histocompatibility complex-restricted antitumor activity (P < 0.01 for allogeneic renal, nonrenal, and NK-sensitive K562 cells), while exhibiting no effect on the level of autologous killing.
(8) In contrast, immune T cells (including some TIL) are MHC-restricted, act under the direction of memory cells and lyse target cells primarily but not exclusively by the release of lymphotoxin (TNF beta) causing programmed cell death (apoptosis) through endonuclease activation and target cell DNA fragmentation.
(9) Much has been learned about TIL biology and their functional characteristics recently, but only few clinical trials have been completed to date.
(10) Tumor-infiltrating lymphocytes (TIL) from human pulmonary tumors have been studied as a model for local depression of cell-mediated immunity at the tumor site.
(11) Phenotypic analysis of expanded TIL and two clones further analyzed in more detail showed CD3+, CD4+, CD8-, and 2H4+ (CD45R+) expression.
(12) The studies demonstrate the feasibility of TILs as suitable cellular vehicles for the introduction of therapeutic genes into patients receiving autologous TILs.
(13) High levels of activity were exhibited by TIL against both P815, which is resistant to natural killer (NK) cells, and to NK-sensitive YAC-1 cells.
(14) To improve the potency of TILs, new cytokines with T-cell stimulatory effects used alone or in combination with interleukin-2 (IL-2) are currently being investigated.
(15) On the other hand, TIL derived from the 2 patients whose melanoma cell lines had lost expression of HLA-A2 had a predominant CD4 phenotype and virtually no cytotoxic activity.
(16) These observations may imply the possibility of adoptive immunotherapy using TIL against human primary liver tumors.
(17) Titration of K562 targets in a 51Cr release assay revealed that untreated TIL have low cytotoxicity (4.32%) compared to untreated PBL (34.3%, P = less than 0.001).
(18) Dominant rearrangements of T-cell receptor (TCR) beta-chain genes are reported among tumor-infiltrating lymphocytes (TIL).
(19) This augmentation of TIL-mediated antitumor activity was dependent on the dose of radiation used.
(20) Those TIL expressing activation antigens were CD2+, SIg-.
Until
Definition:
(prep.) To; unto; towards; -- used of material objects.
(prep.) To; up to; till; before; -- used of time; as, he staid until evening; he will not come back until the end of the month.
(conj.) As far as; to the place or degree that; especially, up to the time that; till. See Till, conj.