| Zinc-suppressed inflammatory cytokines by induction of A20-mediated inhibition of nuclear factor-κB. | |
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MedLine Citation:
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PMID: 21035309 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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OBJECTIVE: Chronic generation of inflammatory cytokines and reactive oxygen species are implicated in atherosclerosis, aging, cancers, and other chronic diseases. We hypothesized that zinc induces A20 in premonocytic, endothelial, and cancer cells, and A20 binds to tumor necrosis factor (TNF)-receptor associated factor, and inhibits Iκ kinase-α (IKK-α)/nuclear factor-κB (NF-κB), resulting in downregulation of TNF-α and interleukin-1β (IL-1β). METHODS: To test this hypothesis, we used HL-60, human umbilical vein endothelial cells, and SW480 cell lines under zinc-deficient and zinc-sufficient conditions in this study. We measured oxidative stress markers, inflammatory cytokines, A20 protein and mRNA, A20-FRAF-1 complex, and IKK-α/NF-κB signaling in stimulated zinc-deficient and zinc sufficient cells. We also conducted antisense A20 and siRNA studies to investigate the regulatory role of zinc in TNF-α and IL-1β via A20. RESULTS: We found that zinc increased A20 and A20-tumor necrosis factor-receptor associated factor-1 complex, decreased the IKK-α/NF-κB signaling pathway, oxidative stress markers, and inflammatory cytokines in these cells compared with zinc-deficient cells. We confirmed that zinc-induced A20 contributes to downregulation of TNF-α and IL-1β by antisense and short interfering RNA A20 studies. CONCLUSION: Our studies suggest that zinc suppresses generation of NF-κB-regulated inflammatory cytokines by induction of A20. |
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Authors:
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Ananda S Prasad; Bin Bao; Frances W J Beck; Fazlul H Sarkar |
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Publication Detail:
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Type: Journal Article Date: 2010-10-29 |
Journal Detail:
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Title: Nutrition (Burbank, Los Angeles County, Calif.) Volume: 27 ISSN: 1873-1244 ISO Abbreviation: Nutrition Publication Date: 2011 Jul-Aug |
Date Detail:
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Created Date: 2011-06-17 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8802712 Medline TA: Nutrition Country: United States |
Other Details:
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Languages: eng Pagination: 816-23 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 Elsevier Inc. All rights reserved. |
Affiliation:
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Department of Internal Medicine, Division of Hematology/Oncology, Karmanos Cancer Center, Wayne State University School of Medicine, Detroit, Michigan, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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