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- W1641598552 abstract "Migration of dendritic cells (DCs) plays an important role in T-cell-mediated adaptive immune responses. Lipopolysaccharide (LPS) sensed by Toll-like receptor 4 (TLR4) serves as a signal for DC migration. We analyzed LPS-induced DC volume changes preceding the directed movement towards chemoattractants. Treatment with LPS resulted in rapid, prolonged cell swelling in wild-type (WT), but not in TLR4(-/-) bone marrow-derived (BM) DCs indicating that TLR4 signaling is essential for LPS-induced swelling. As a consequence, LPS-treatment enhanced the migratory activity along a chemokine (CCL21)-gradient in WT, but not in TLR4-deficient BMDCs suggesting that the LPS/TLR4-induced swelling response facilitates DC migration. Moreover, the role of calcium-activated potassium channels (K(Ca) 3.1) as putative regulators of immune cell volume regulation and migration was analyzed in LPS-challenged BMDCs. We found that the LPS-induced swelling of K(Ca) 3.1-deficient DCs was impaired when compared to WT DCs. Accordingly, the LPS-induced increase in [Ca(2+)](i) detected in WT DCs was reduced in K(Ca) 3.1-deficient DCs. Finally, directed migration of LPS-challenged K(Ca) 3.1-deficient DCs was low compared to WT DCs indicating that activation of K(Ca) 3.1 is involved in LPS-induced DC migration. These findings suggest that both TLR4 and K(Ca) 3.1 contribute to the migration of LPS-activated DCs as an important feature of the adaptive immune response." @default.
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- W1641598552 date "2014-01-01" @default.
- W1641598552 modified "2023-10-12" @default.
- W1641598552 title "Lipopolysaccharide induces cell volume increase and migration of dendritic cells" @default.
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- W1641598552 doi "https://doi.org/10.1111/1348-0421.12116" @default.
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