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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Autophagy
2015 ; 11
(10
): 1864-77
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Common ?-chain cytokine signaling is required for macroautophagy induction during
CD4+ T-cell activation
#MMPMID26391567
Botbol Y
; Patel B
; Macian F
Autophagy
2015[]; 11
(10
): 1864-77
PMID26391567
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Macroautophagy is a cellular process that mediates degradation in the lysosome of
cytoplasmic components including proteins and organelles. Previous studies have
shown that macroautophagy is induced in activated T cells to regulate organelle
homeostasis and the cell's energy metabolism. However, the signaling pathways
that initiate and regulate activation-induced macroautophagy in T cells have not
been identified. Here, we show that activation-induced macroautophagy in T cells
depends on signaling from common ?-chain cytokines. Consequently, inhibition of
signaling through JAK3, induced downstream of cytokine receptors containing the
common ?-chain, prevents full induction of macroautophagy in activated T cells.
Moreover, we found that common ?-chain cytokines are not only required for
macroautophagy upregulation during T cell activation but can themselves induce
macroautophagy. Our data also show that macroautophagy induction in T cells is
associated with an increase of LC3 expression that is mediated by a
post-transcriptional mechanism. Overall, our findings unveiled a new role for
common ?-chain cytokines as a molecular link between autophagy induction and
T-cell activation.