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IL-2/anti-IL-2 antibody complexes show strong biological activity by avoiding interaction with IL-2 receptor α subunit CD25
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IL-2/anti-IL-2 antibody complexes show strong biological activity by avoiding interaction with IL-2 receptor α subunit CD25
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Journal Article
IL-2/anti-IL-2 antibody complexes show strong biological activity by avoiding interaction with IL-2 receptor α subunit CD25
2010
Overview
IL-2 is crucial to T cell homeostasis, especially of CD4⁺ T regulatory cells and memory CD8⁺ cells, as evidenced by vigorous proliferation of these cells in vivo following injections of superagonist IL-2/anti-IL-2 antibody complexes. The mechanism of IL-2/anti-IL-2 antibody complexes is unknown owing to a lack of understanding of IL-2 homeostasis. We show that IL-2 receptor α (CD25) plays a crucial role in IL-2 homeostasis. Thus, prolongation of IL-2 half-life and blocking of CD25 using antibodies or CD25-deficient mice led in combination, but not alone, to vigorous IL-2-mediated T cell proliferation, similar to IL-2/anti-IL-2 antibody complexes. These data suggest an unpredicted role for CD25 in IL-2 homeostasis.
Publisher
National Academy of Sciences,National Acad Sciences
Subject
/ Animals
/ Antibodies, Blocking - administration & dosage
/ Antigen-Antibody Complex - metabolism
/ Immunoglobulin G - metabolism
/ Interleukin-2 Receptor alpha Subunit - antagonists & inhibitors
/ Interleukin-2 Receptor alpha Subunit - deficiency
/ Interleukin-2 Receptor alpha Subunit - genetics
/ Interleukin-2 Receptor alpha Subunit - metabolism
/ Mice
/ Recombinant Fusion Proteins - immunology
/ Recombinant Fusion Proteins - metabolism
/ Spleen
