Macrophage activation by endogenous danger signals.

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Macrophage activation by endogenous danger signals. Abstract Text:

X Zhang,Dm Mosser,

Macrophages are cells that function as a first line of defence against invading microorganisms. One of the hallmarks of macrophages is their ability to become activated in response to exogenous 'danger signals'. Most microbes have molecular patterns (PAMPS) that are recognized by macrophages and trigger this activation response. There are many aspects of the activation response to PAMPS that are recapitulated when macrophages encounter endogenous danger signals. In response to damaged or stressed self, macrophages undergo physiological changes that include the initiation of signal transduction cascades from germline-encoded receptors, resulting in the elaboration of chemokines, cytokines and toxic mediators. This response to endogenous mediators can enhance inflammation, and thereby contribute to autoimmune pathologies. Often the overall inflammatory response is the result of cooperative activation signals from both exogenous and endogenous signals. Macrophage activation plays a critical role, not only in the initiation of the inflammatory response but also in the resolution of this response. The clearance of granulocytes and the elaboration of anti-inflammatory mediators by macrophages contribute to the dissolution of the inflammatory response. Thus, macrophages are a key player in the initiation, propagation and resolution of inflammation. This review summarizes our understanding of the role of macrophages in inflammation. We pay particular attention to the endogenous danger signals that macrophages may encounter and the responses that these signals induce. The molecular mechanisms responsible for these responses and the diseases that result from inappropriately controlled macrophage activation are also examined. Copyright (c) 2007 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.

Macrophage activation by endogenous danger signals. Publishing Authors By Initials

X Zhang,D Mosser,

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Macrophage activation by endogenous danger signals. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Journal of pathology

VOLUME: 214

Page Numbers: 161-78

Journal Abbreviation: J. Pathol.

ISSN: 0022-3417

DAY: 2

MONTH: Jan

YEAR: 2008

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LANGUAGE: eng

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AFFILIATION: Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, USA.

Country: England

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MEDLINETA: J Pathol

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