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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Soni, Dheeraj Sundivakkam, Premanand C. Tiruppathi, Chinnaswamy Vogel, Stephen M. Malik, Asrar B. Debroy, Auditi |
| Description | Author Affiliation: DebRoy A ( From the Department of Pharmacology and Center for Lung and Vascular Biology, College of Medicine, University of Illinois, Chicago, Illinois 60612.); Vogel SM ( From the Department of Pharmacology and Center for Lung and Vascular Biology, College of Medicine, University of Illinois, Chicago, Illinois 60612.); Soni D ( From the Department of Pharmacology and Center for Lung and Vascular Biology, College of Medicine, University of Illinois, Chicago, Illinois 60612.); Sundivakkam PC ( From the Department of Pharmacology and Center for Lung and Vascular Biology, College of Medicine, University of Illinois, Chicago, Illinois 60612.); Malik AB ( From the Department of Pharmacology and Center for Lung and Vascular Biology, College of Medicine, University of Illinois, Chicago, Illinois 60612.); Tiruppathi C ( From the Department of Pharmacology and Center for Lung and Vascular Biology, College of Medicine, University of Illinois, Chicago, Illinois 60612 tiruc@uic.edu.) |
| Abstract | Stromal interacting molecule 1 (STIM1) regulates store-operated Ca(2+) entry (SOCE). Here we show that STIM1 expression in endothelial cells (ECs) is increased during sepsis and, therefore, contributes to hyperpermeability. LPS induced STIM1 mRNA and protein expression in human and mouse lung ECs. The induced STIM1 expression was associated with augmented SOCE as well as a permeability increase in both in vitro and in vivo models. Because activation of both the NF-κB and p38 MAPK signaling pathways downstream of TLR4 amplifies vascular inflammation, we studied the influence of these two pathways on LPS-induced STIM1 expression. Inhibition of either NF-κB or p38 MAPK activation by pharmacological agents prevented LPS-induced STIM1 expression. Silencing of the NF-κB proteins (p65/RelA or p50/NF-κB1) or the p38 MAPK isoform p38 prevented LPS-induced STIM1 expression and increased SOCE in ECs. In support of these findings, we found NF-κB and AP1 binding sites in the 5'-regulatory region of human and mouse STIM1 genes. Further, we demonstrated that LPS induced time-dependent binding of the transcription factors NF-κB (p65/RelA) and AP1 (c-Fos/c-Jun) to the STIM1 promoter. Interestingly, silencing of c-Fos, but not c-Jun, markedly reduced LPS-induced STIM1 expression in ECs. We also observed that silencing of p38 prevented c-Fos expression in response to LPS in ECs, suggesting that p38 signaling mediates the expression of c-Fos. These results support the proposal that cooperative signaling of both NF-κB and AP1 (via p38 ) amplifies STIM1 expression in ECs and, thereby, contributes to the lung vascular hyperpermeability response during sepsis. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 35 |
| Volume Number | 289 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2014-08-29 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Endothelium, Vascular Drug Effects Endotoxins Pharmacology Membrane Proteins Metabolism NF-kappa B Neoplasm Proteins Proto-Oncogene Proteins C-fos Signal Transduction Transcription Factor AP-1 Animals Capillary Permeability Cells, Cultured DNA Primers Cytology Mice Mice, Inbred C57BL Real-Time Polymerase Chain Reaction P38 Mitogen-Activated Protein Kinases Research Support, N.I.H., Extramural Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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