Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/57316
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Type: Journal article
Title: Suppression of NF-kappa B by Cyclosporin A and Tacrolimus (FK506) via Induction of the C/EBP Family: Implication for Unfolded Protein Response
Author: Du, S.
Hiramatsu, N.
Hayakawa, K.
Kasai, A.
Okamura, M.
Huang, T.
Yao, J.
Takeda, M.
Araki, I.
Sawada, N.
Paton, A.
Paton, J.
Kitamura, M.
Citation: Journal of Immunology, 2009; 182(11):7201-7211
Publisher: Amer Assoc Immunologists
Issue Date: 2009
ISSN: 0022-1767
1550-6606
Statement of
Responsibility: 
Shuqi Du, Nobuhiko Hiramatsu, Kunihiro Hayakawa, Ayumi Kasai, Maro Okamura, Tao Huang, Jian Yao, Masayuki Takeda, Isao Araki, Norifumi Sawada, Adrienne W. Paton, James C. Paton and Masanori Kitamura
Abstract: Immunosuppressive agents cyclosporin A (CsA) and tacrolimus (FK506) inhibit cytokine production by activated lymphocytes through interfering with calcineurin. However, little is known about their effects on the function of nonlymphoid cells. We found that, in renal tubular cells, induction of MCP-1 by inflammatory cytokines was blunted by CsA and FK506. This suppression was correlated with induction of unfolded protein response (UPR) evidenced by endogenous and exogenous indicators. The induction of UPR by these agents was reversible and observed generally in other nonimmune cells. Furthermore, administration with CsA in reporter mice caused rapid, systemic induction of UPR in vivo. In TNF--treated cells, suppression of MCP-1 by CsA or FK506 was associated with blunted responses of NF-B, the crucial regulator of MCP-1. The suppression of NF-B was reproduced by other inducers of UPR including AB5 subtilase cytotoxin, tunicamycin, thapsigargin, and A23187. CsA and FK506, as well as other UPR inducers, caused up-regulation of C/EBP family members, especially C/EBPβ and CHOP (C/EBP homologous protein), and overexpression of either C/EBPβ or CHOP significantly attenuated TNF--triggered NF-B activation. Furthermore, down-regulation of C/EBPβ by small interfering RNA substantially reversed the suppressive effect of CsA on TNF--induced MCP-1 expression. These results suggested that CsA and FK506 confer insensitiveness to TNF- on resident cells through UPR-dependent induction of the C/EBP family members
Keywords: Kidney Tubules; Cell Line; Animals; Swine; Humans; Mice; Rats; Tacrolimus; Cyclosporine; Tumor Necrosis Factor-alpha; CCAAT-Enhancer-Binding Proteins; NF-kappa B; Immunosuppressive Agents; Protein Folding; Chemokine CCL2; Transcriptional Activation
Description: Copyright © 2009 by The American Association of Immunologists, Inc.
RMID: 0020090719
DOI: 10.4049/jimmunol.0801772
Appears in Collections:Molecular and Biomedical Science publications

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