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- W2094860050 abstract "Current in vitro techniques for isolating leukemia-reactive cytotoxic T lymphocytes (CTLs) from healthy donors are of relatively low efficiency and yield responder populations with unknown biological significance. This study aimed at the development of a more reliable approach, allowing generation and expansion of acute myeloid leukemia (AML)-reactive CTLs using primary in vitro stimulation.We established allogeneic mini-mixed lymphocyte-leukemia cultures (mini-MLLCs) by stimulating donor CD8(+) T cells with human leukocyte antigen (HLA) class I-matched AML blasts in microtiter plates. Before culture, CD8(+) T cells were separated into CD62L((high)+) and CD62L((low)+/neg) subsets enriched for naive/central memory and effector memory cells, respectively.In eight different related and unrelated donor/AML pairs, numerous CTL populations were isolated that specifically lysed myeloid leukemias in association with various HLA-A, -B, or -C alleles. These CTLs expressed T-cell receptors of single Vbeta-chain families, indicating their clonal origin. The majority of CTL clones were obtained from mini-MLLCs initiated with CD62L((high)+) cells. Using antigen-specific stimulation, multiple CTL populations were amplified to 10(8)-10(10) cells within 6 to 8 weeks. Three of four representative CTL clones were capable of completely preventing engraftment of human primary AML blasts in nonobese diabetic/severe combined immune deficient IL2Rgamma(null) mice.The mini-MLLC approach allows the efficient in vitro expansion of AML-reactive CTL clones from CD8(+)CD62L((high)+) precursors of healthy donors. These CTLs can inhibit leukemia engraftment in immunodeficient mice, suggesting their potential biological relevance." @default.
- W2094860050 created "2016-06-24" @default.
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- W2094860050 date "2008-04-01" @default.
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- W2094860050 title "Acute myeloid leukemia (AML)-reactive cytotoxic T lymphocyte clones rapidly expanded from CD8+ CD62L(high)+ T cells of healthy donors prevent AML engraftment in NOD/SCID IL2Rγnull mice" @default.
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- W2094860050 doi "https://doi.org/10.1016/j.exphem.2007.12.011" @default.
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