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S100A8/A9 at low concentration promotes tumor cell growth via RAGE ligation and MAP kinase-dependent pathway
Department of Biochemistry and Medical Genetics, Manitoba Institute of Cell Biology, Cancer Care Manitoba, Winnipeg, Manitoba, Canada.
Manitoba Institute of Cell Biology and Department of Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, Manitoba, Canada.
Departments of Biochemistry, Physics and Chemistry, Center for Structural Biology, Vanderbilt University, Nashville, Tennessee, USA;.
Manitoba Institute of Cell Biology and Department of Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, Manitoba, Canada.
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2008 (English)In: Journal of Leukocyte Biology, ISSN 0741-5400, E-ISSN 1938-3673, Vol. 83, no 6, 1484-1492 p.Article in journal (Refereed) Published
Abstract [en]

The complex formed by two members of the S100 calcium-binding protein family, S100A8/A9, exerts apoptosis-inducing activity against various cells, especially tumor cells. Here, we present evidence that S100A8/A9 also has cell growth-promoting activity at low concentrations. Receptor of advanced glycation end product (RAGE) gene silencing and cotreatment with a RAGE-specific blocking antibody revealed that this activity was mediated via RAGE ligation. To investigate the signaling pathways, MAPK phosphorylation and NF-κB activation were characterized in S100A8/A9-treated cells. S100A8/A9 caused a significant increase in p38 MAPK and p44/42 kinase phosphorylation, and the status of stress-activated protein kinase/JNK phosphorylation remained unchanged. Treatment of cells with S100A8/A9 also enhanced NF-κB activation. RAGE small interfering RNA pretreatment abrogated the S100A8/A9-induced NF-κB activation. Our data indicate that S100A8/A9-promoted cell growth occurs through RAGE signaling and activation of NF-κB.

Place, publisher, year, edition, pages
eration of American Societies for Experimental Biology , 2008. Vol. 83, no 6, 1484-1492 p.
Keyword [en]
NF-κB proliferation MRP8 MRP14 endokines S100/calgranulins cytotoxic peptides
National Category
Cancer and Oncology Cell Biology Biochemistry and Molecular Biology
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URN: urn:nbn:se:liu:diva-86927DOI: 10.1189/jlb.0607397ISI: 000258019800022PubMedID: 18339893OAI: oai:DiVA.org:liu-86927DiVA: diva2:583307
Available from: 2013-01-07 Created: 2013-01-07 Last updated: 2017-12-06

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Los, Marek Jan

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