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- W2169416095 abstract "Abstract Interleukin-7 (IL-7) is an essential cytokine for T-cell development and homeostasis. It is well established that IL-7 promotes the transcriptional down-regulation of IL7RA, leading to decreased IL-7Rα surface expression. However, it is currently unknown whether IL-7 regulates the intracellular trafficking and early turnover of its receptor on ligand binding. Here, we show that, in steady-state T cells, IL-7Rα is slowly internalized and degraded while a significant fraction recycles back to the surface. On IL-7 stimulation, there is rapid IL-7Rα endocytosis via clathrin-coated pits, decreased receptor recycling, and accelerated lysosome and proteasome-dependent degradation. In accordance, the half-life of IL-7Rα decreases from 24 hours to approximately 3 hours after IL-7 treatment. Interestingly, we further demonstrate that clathrin-dependent endocytosis is necessary for efficient IL-7 signal transduction. In turn, pretreatment of T cells with JAK3 or pan-JAK inhibitors suggests that IL-7Rα degradation depends on the activation of the IL-7 signaling effector JAK3. Overall, our findings indicate that IL-7 triggers rapid IL-7Rα endocytosis, which is required for IL-7–mediated signaling and subsequent receptor degradation." @default.
- W2169416095 created "2016-06-24" @default.
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- W2169416095 date "2010-04-22" @default.
- W2169416095 modified "2023-10-18" @default.
- W2169416095 title "IL-7 induces rapid clathrin-mediated internalization and JAK3-dependent degradation of IL-7Rα in T cells" @default.
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- W2169416095 doi "https://doi.org/10.1182/blood-2009-10-246876" @default.
- W2169416095 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20190194" @default.
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