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Type: Journal article
Title: Induction of CC and CXC chemokines in human antigen‐presenting dendritic cells by the pneumococcal proteins pneumolysin and CbpA, and the role played by Toll‐Like receptor 4, NF‐κB, and mitogen‐activated protein kinases
Other Titles: Induction of CC and CXC chemokines in human antigen-presenting dendritic cells by the pneumococcal proteins pneumolysin and CbpA, and the role played by Toll-Like receptor 4, NF-kappaB, and mitogen-activated protein kinases
Author: Bernatoniene, J.
Zhang, Q.
Dogan, S.
Mitchell, T.
Paton, J.
Finn, A.
Citation: Journal of Infectious Diseases, 2008; 198(12):1823-1833
Publisher: Univ Chicago Press
Issue Date: 2008
ISSN: 0022-1899
Statement of
Jolanta Bernatoniene, Qibo Zhang, Semih Dogan, Tim J. Mitchell, James C. Paton, and Adam Finn
Abstract: Background. Choline‐binding protein A (CbpA) and pneumolysin (Ply) can induce the expression and release of chemokines by human cells, which might modulate specific immune responses. In dendritic cells (DCs), such effects could be important for the size and character of the immunity induced if administered as vaccines. We studied the induction of CCL and CXCL chemokines by CbpA and Ply in DCs and related signaling pathways. Methods. Proteins derived from bacterial cultures and cloning were used as stimulants. DCs were generated from CD14+ human monocytes by negative selection, followed by coculture with recombinant human granulocyte‐macrophage colony‐stimulating factor and recombinant interleukin‐4. The role played by Toll‐like receptors (TLRs) was assessed using anti‐TLR antibodies. Likewise, specific inhibitors (given in parentheses) of signaling molecules were used: NF‐κB (SN50), extracellular signal-regulated kinase (PD98059), p38 (SB203580), and Jun N‐terminal kinase (SP600125). Results. Both CbpA and Ply significantly up‐regulated DC mRNA of several CCL (2, 4, 5, and 8) and CXCL (8 and 10) chemokines studied as well as the expression of 3 proteins studied: CCL2, CCL5, and CXCL8. Ply stimulation was blocked by anti‐TLR4. Inhibition of NF‐κB and several mitogen‐activated protein kinase signaling pathways also reduced chemokine release. Conclusion. Chemokine induction in DCs by CbpA and Ply may be important for their potential use in future pneumococcal vaccines.
Keywords: Dendritic Cells
Cells, Cultured
Mitogen-Activated Protein Kinase Kinases
Bacterial Proteins
NF-kappa B
Chemokines, CC
Chemokines, CXC
Culture Media, Conditioned
Signal Transduction
Gene Expression Regulation
Toll-Like Receptor 4
DOI: 10.1086/593177
Appears in Collections:Aurora harvest
Molecular and Biomedical Science publications

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