Heat shock protein 90 mediates macrophage activation by Taxol and bacterial lipopolysaccharide Journal Article
| Authors: | Byrd, C. A.; Bornmann, W.; Erdjument-Bromage, H.; Tempst, P.; Pavletich, N.; Rosen, N.; Nathan, C. F.; Ding, A. |
| Article Title: | Heat shock protein 90 mediates macrophage activation by Taxol and bacterial lipopolysaccharide |
| Abstract: | Taxol, a plant-derived antitumor agent, stabilizes microtubules. Taxol also elicits cell signals in a manner indistinguishable from bacterial lipopolysaccharide (LPS). LPS-like actions of Taxol are controlled by the lps gene and are independent of binding to the known Taxol target, β-tubulin. Using biotin-labeled Taxol, avidin-agarose affinity chromatography, and peptide mass fingerprinting, we identified two Taxol targets from mouse macrophages and brain as heat shock proteins (Hsps) of the 70- and 90-kDa families. Geldanamycin, a specific inhibitor of the Hsp 90 family, blocked the nuclear translocation of NF-κB and expression of tumor necrosis factor in macrophages treated with Taxol or with LPS. Geldanamycin did not block microtubule bundling by Taxol or macrophage activation by tumor necrosis factor. Thus, Taxol binds Hsps, and Hsp 90 helps mediate the activation of macrophages by Taxol and by LPS. |
| Keywords: | immunohistochemistry; signal transduction; controlled study; dna-binding proteins; nonhuman; antineoplastic agents; drug targeting; paclitaxel; mass spectrometry; animal cell; mouse; animals; mice; beta tubulin; protein targeting; immunoglobulin enhancer binding protein; bacteria (microorganisms); animalia; nuclear proteins; tumor necrosis factor-alpha; recombinant tumor necrosis factor; brain; nf-kappa b; heat shock protein 90; hsp90 heat-shock proteins; quinones; heat shock protein 70; protein family; macrophages; microtubule; microtubules; benzoquinones; lactams, macrocyclic; biotinylation; geldanamycin; agarose; affinity chromatography; lipopolysaccharides; macrophage activation; bacterium lipopolysaccharide; avidin; priority journal; article |
| Journal Title: | Proceedings of the National Academy of Sciences of the United States of America |
| Volume: | 96 |
| Issue: | 10 |
| ISSN: | 0027-8424 |
| Publisher: | National Academy of Sciences |
| Date Published: | 1999-05-01 |
| Start Page: | 5645 |
| End Page: | 5650 |
| Language: | English |
| DOI: | 10.1073/pnas.96.10.5645 |
| PUBMED: | 10318938 |
| PROVIDER: | scopus |
| PMCID: | PMC21914 |
| DOI/URL: | |
| Notes: | Article -- Export Date: 16 August 2016 -- Source: Scopus |
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