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J. Biol. Chem. 277 (17): 15028-15034

© 2002 by The American Society for Biochemistry and Molecular Biology, Inc.

Novel Signal Transduction Pathway Utilized by Extracellular HSP70
ROLE OF Toll-LIKE RECEPTOR (TLR) 2 AND TLR4*

Alexzander AseaDagger , Michael Rehli§, Edith KabinguDagger , Jason A. Boch, Olivia BaréDagger , Philip E. Auron, Mary Ann Stevenson||, and Stuart K. CalderwoodDagger **

From the Dagger  Department of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, the § Department of Hematology and Oncology, University of Regensburg Medical Hospital, Regensburg 93042, Germany, the  Department of Medicine, Harvard Medical School and New England Baptist Bone and Joint Institute, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02115, and the || Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02115

Recent studies have initiated a paradigm shift in the understanding of the function of heat shock proteins (HSP). It is now clear that HSP can and do exit mammalian cells, interact with cells of the immune system, and exert immunoregulatory effects. We recently demonstrated that exogenously added HSP70 possesses potent cytokine activity, with the ability to bind with high affinity to the plasma membrane, elicit a rapid intracellular Ca2+ flux, activate NF-kappa B, and up-regulate the expression of pro-inflammatory cytokines in human monocytes. Here for the first time, we report that HSP70-induced proinflammatory cytokine production is mediated via the MyD88/IRAK/NF-kappa B signal transduction pathway and that HSP70 utilizes both TLR2 (receptor for Gram-positive bacteria) and TLR4 (receptor for Gram-negative bacteria) to transduce its proinflammatory signal in a CD14-dependent fashion. These studies now pave the way for the development of highly effective pharmacological or molecular tools that will either up-regulate or suppress HSP70-induced functions in conditions where HSP70 effects are desirable (cancer) or disorders where HSP70 effects are undesirable (arthritis and arteriosclerosis).


* This work was supported by National Institutes of Health Grants CA47407, CA31303, CA50642, and CA77465 (to S. K. C.), a Joint Center for Radiation Therapy Foundation Grant (to A. A.), National Institutes of Health Grants CA68544 and AI44122 (to P. E. A.) and the Deutsche Forschungsgemeinschaft (to M. R.).The costs of publication of this article were defrayed in part by the payment of page charges. The article must therefore be hereby marked "advertisement" in accordance with 18 U.S.C. Section 1734 solely to indicate this fact.

** To whom correspondence may be addressed: Dept. of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, 44 Binney St. (D810), Boston, MA 02115. Tel.: 617-632-3885; Fax: 617-632-4599; E-mail: stuart_calderwood@dfci.harvard.edu.


Copyright © 2002 by The American Society for Biochemistry and Molecular Biology, Inc.


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   Abstract »    PDF »
Helicobacter pylori heat-shock protein 60 induces interleukin-8 via a Toll-like receptor (TLR)2 and mitogen-activated protein (MAP) kinase pathway in human monocytes.
Y. Zhao, K. Yokota, K. Ayada, Y. Yamamoto, T. Okada, L. Shen, and K. Oguma (2007)
J. Med. Microbiol. 56, 154-164
   Abstract »    Full Text »    PDF »
Intracellular and extracellular functions of heat shock proteins: repercussions in cancer therapy.
E. Schmitt, M. Gehrmann, M. Brunet, G. Multhoff, and C. Garrido (2007)
J. Leukoc. Biol. 81, 15-27
   Abstract »    Full Text »    PDF »
Toll-like receptor 2 modulates left ventricular function following ischemia-reperfusion injury.
Y. Sakata, J.-W. Dong, J. G. Vallejo, C.-H. Huang, J. S. Baker, K. J. Tracey, O. Tacheuchi, S. Akira, and D. L. Mann (2007)
Am J Physiol Heart Circ Physiol 292, H503-H509
   Abstract »    Full Text »    PDF »
Role of Scavenger Receptors in the Binding and Internalization of Heat Shock Protein 70.
J. R. Theriault, H. Adachi, and S. K. Calderwood (2006)
J. Immunol. 177, 8604-8611
   Abstract »    Full Text »    PDF »
Toll-Like Receptor 2 Signaling in Response to Brain Injury: An Innate Bridge to Neuroinflammation.
A. A. Babcock, M. Wirenfeldt, T. Holm, H. H. Nielsen, L. Dissing-Olesen, H. Toft-Hansen, J. M. Millward, R. Landmann, S. Rivest, B. Finsen, et al. (2006)
J. Neurosci. 26, 12826-12837
   Abstract »    Full Text »    PDF »
Extracellular Heat Shock Protein-70 Induces Endotoxin Tolerance in THP-1 Cells.
R. Aneja, K. Odoms, K. Dunsmore, T. P. Shanley, and H. R. Wong (2006)
J. Immunol. 177, 7184-7192
   Abstract »    Full Text »    PDF »
Heat Shock Treatment of Tumor Lysate-Pulsed Dendritic Cells Enhances Their Capacity to Elicit Antitumor T Cell Responses against Medullary Thyroid Carcinoma.
T. Bachleitner-Hofmann, M. Strohschneider, P. Krieger, M. Sachet, P. Dubsky, H. Hayden, S. F. Schoppmann, R. Pfragner, M. Gnant, J. Friedl, et al. (2006)
J. Clin. Endocrinol. Metab. 91, 4571-4577
   Abstract »    Full Text »    PDF »
Heat shock proteins induce T cell regulation of chronic inflammation.
F Hauet-Broere, L Wieten, T Guichelaar, S Berlo, R van der Zee, and W Van Eden (2006)
Ann Rheum Dis 65, iii65-iii68
   Abstract »    Full Text »    PDF »
Insulin induces myocardial protection and Hsp70 localization to plasma membranes in rat hearts.
G. Li, I. S. Ali, and R. W. Currie (2006)
Am J Physiol Heart Circ Physiol 291, H1709-H1721
   Abstract »    Full Text »    PDF »
Killing of Normal Melanocytes, Combined with Heat Shock Protein 70 and CD40L Expression, Cures Large Established Melanomas.
L. Sanchez-Perez, T. Kottke, G. A. Daniels, R. M. Diaz, J. Thompson, J. Pulido, A. Melcher, and R. G. Vile (2006)
J. Immunol. 177, 4168-4177
   Abstract »    Full Text »    PDF »
Extracellular heat shock protein 72 is a marker of the stress protein response in acute lung injury.
M. T. Ganter, L. B. Ware, M. Howard, J. Roux, B. Gartland, M. A. Matthay, M. Fleshner, and J.-F. Pittet (2006)
Am J Physiol Lung Cell Mol Physiol 291, L354-L361
   Abstract »    Full Text »    PDF »
Interaction of TLR2 and TLR4 Ligands with the N-terminal Domain of Gp96 Amplifies Innate and Adaptive Immune Responses.
T. Warger, N. Hilf, G. Rechtsteiner, P. Haselmayer, D. M. Carrick, H. Jonuleit, P. von Landenberg, H.-G. Rammensee, C. V. Nicchitta, M. P. Radsak, et al. (2006)
J. Biol. Chem. 281, 22545-22553
   Abstract »    Full Text »    PDF »
Invited review: Roles for accessory molecules in microbial recognition by Toll-like receptors.
K. Miyake (2006)
Innate Immunity 12, 195-204
   Abstract »    PDF »
Extracellular Targeting of Endoplasmic Reticulum Chaperone Glucose-Regulated Protein 170 Enhances Tumor Immunity to a Poorly Immunogenic Melanoma.
X.-Y. Wang, H. Arnouk, X. Chen, L. Kazim, E. A. Repasky, and J. R. Subjeck (2006)
J. Immunol. 177, 1543-1551
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High-Affinity Interactions between Peptides and Heat Shock Protein 70 Augment CD8+ T Lymphocyte Immune Responses.
J. B. Flechtner, K. P. Cohane, S. Mehta, P. Slusarewicz, A. K. Leonard, B. H. Barber, D. L. Levey, and S. Andjelic (2006)
J. Immunol. 177, 1017-1027
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Inhibition of Toll-like Receptor 4 With Eritoran Attenuates Myocardial Ischemia-Reperfusion Injury.
A. Shimamoto, A. J. Chong, M. Yada, S. Shomura, H. Takayama, A. J. Fleisig, M. L. Agnew, C. R. Hampton, C. L. Rothnie, D. J. Spring, et al. (2006)
Circulation 114, I-270-I-274
   Abstract »    Full Text »    PDF »
Stress Wars: the Direct Role of Host and Bacterial Molecular Chaperones in Bacterial Infection.
B. Henderson, E. Allan, and A. R. M. Coates (2006)
Infect. Immun. 74, 3693-3706
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The role of human glioma-infiltrating microglia/macrophages in mediating antitumor immune responses.
S. F. Hussain, D. Yang, D. Suki, K. Aldape, E. Grimm, and A. B. Heimberger (2006)
Neuro Oncology 8, 261-279
   Abstract »    Full Text »    PDF »

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