Inositol 1,4,5-trisphosphate 3-kinase B promotes Ca 2+ mobilization and the inflammatory activity of dendritic cells
- 30 March 2021
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science Signaling
- Vol. 14 (676)
- https://doi.org/10.1126/scisignal.aaz2120
Abstract
Innate immune responses to Gram-negative bacteria depend on the recognition of lipopolysaccharide (LPS) by a receptor complex that includes CD14 and TLR4. In dendritic cells (DCs), CD14 enhances the activation not only of TLR4 but also that of the NFAT family of transcription factors, which suppresses cell survival and promotes the production of inflammatory mediators. NFAT activation requires Ca2+ mobilization. In DCs, Ca2+ mobilization in response to LPS depends on phospholipase C γ2 (PLCγ2), which produces inositol 1,4,5-trisphosphate (IP3). Here, we showed that the IP3 receptor 3 (IP3R3) and ITPKB, a kinase that converts IP3 to inositol 1,3,4,5-tetrakisphosphate (IP4), were both necessary for Ca2+ mobilization and NFAT activation in mouse and human DCs. A pool of IP3R3 was located on the plasma membrane of DCs, where it colocalized with CD14 and ITPKB. Upon LPS binding to CD14, ITPKB was required for Ca2+ mobilization through plasma membrane–localized IP3R3 and for NFAT nuclear translocation. Pharmacological inhibition of ITPKB in mice reduced both LPS-induced tissue swelling and the severity of inflammatory arthritis to a similar extent as that induced by the inhibition of NFAT using nanoparticles that delivered an NFAT-inhibiting peptide specifically to phagocytic cells. Our results suggest that ITPKB may represent a promising target for anti-inflammatory therapies that aim to inhibit specific DC functions.Keywords
Funding Information
- National Institutes of Health (1R01AI121066-01A1)
- National Institutes of Health (HDDC P30 DK034854)
- National Institutes of Health
- Crohn’s and Colitis Foundation of America (IG 2019I)
- Crohn’s and Colitis Foundation of America (23512)
- New York University School of Medicine
- New York University
- Teikyo University School of Medicine
- Courant Forschungszentrum Geobiologie, Georg-August-Universität Göttingen (12/2018)
- Ministry of Health, Uganda (RF-2018-12367072)
- UniHealth Foundation (1R01AI121066-01A1)
- Associazione Italiana per la Ricerca sul Cancro (IG 2019Id.23512)
This publication has 76 references indexed in Scilit:
- CD14 and NFAT mediate lipopolysaccharide-induced skin edema formation in miceJCI Insight, 2012
- TNF activates calcium–nuclear factor of activated T cells (NFAT)c1 signaling pathways in human macrophagesProceedings of the National Academy of Sciences of the United States of America, 2011
- Calcineurin regulates innate antifungal immunity in neutrophilsThe Journal of Experimental Medicine, 2010
- Regulation of immune cell development through soluble inositol-1,3,4,5-tetrakisphosphateNature Reviews Immunology, 2010
- Dectin-2 is a Syk-coupled pattern recognition receptor crucial for Th17 responses to fungal infectionThe Journal of Experimental Medicine, 2009
- Inositol trisphosphate 3-kinase B (InsP3KB) as a physiological modulator of myelopoiesisProceedings of the National Academy of Sciences of the United States of America, 2008
- Dual functions for the endoplasmic reticulum calcium sensors STIM1 and STIM2 in T cell activation and toleranceNature Immunology, 2008
- A function for tyrosine phosphorylation of type 1 inositol 1,4,5-trisphosphate receptor in lymphocyte activationThe Journal of cell biology, 2007
- Purinergic mechanism in the immune system: A signal of danger for dendritic cellsPurinergic Signalling, 2005
- PLC-γ: an old player has a new roleNature, 2002