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- W4313333814 endingPage "1338" @default.
- W4313333814 startingPage "1333" @default.
- W4313333814 abstract "Abstract Lymphotoxin (LT) is a cytokine that orchestrates lymphoid neogenesis and formation of germinal center reactions. LT exists as a membrane heterotrimer of α and β subunits and is secreted as a homotrimer, LTα3. Using LTβR.Fc, expression of LTαβ on CD4 T cell subsets was investigated in a TCR transgenic model. LTαβ was evident 24–72 h after activation of naive T cells with specific Ag, and declined thereafter. Early expression was independent of IFN-γ and IL-12, however, IL-12 prolonged expression. LTαβ was reinduced within 2–4 h after Ag restimulation, but declined by 24 h regardless of IL-12 or IFN-γ priming. Exposure of naive T cells to IL-4 did not affect early LTαβ expression at 24 h, but resulted in subsequent down-regulation. IL-4-differentiated Th2 effectors did not re-express LTαβ, and LTαβ was transiently found on Th1 clones but not Th2 clones. LTα3 and TNF were immunoprecipitated from supernatants and lysates of IL-12 primed cells but not IL-4 primed cells. These studies demonstrate that LTαβ is expressed by activated naive CD4 cells, unpolarized IL-2-secreting effectors, and Th1 effectors. In contrast, loss of surface LTαβ and a lack of LTα3 and TNF secretion is associated with prior exposure to IL-4 and a Th2 phenotype." @default.
- W4313333814 created "2023-01-06" @default.
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- W4313333814 date "1999-02-01" @default.
- W4313333814 modified "2023-10-11" @default.
- W4313333814 title "Lymphotoxin αβ Is Expressed on Recently Activated Naive and Th1-Like CD4 Cells but Is Down-Regulated by IL-4 During Th2 Differentiation" @default.
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- W4313333814 doi "https://doi.org/10.4049/jimmunol.162.3.1333" @default.
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