Understanding the Mysterious M2 Macrophage through Activation Markers and Effector Mechanisms

The alternatively activated or M2 macrophages are immune cells with high phenotypic heterogeneity and are governing functions at the interface of immunity, tissue homeostasis, metabolism, and endocrine signaling. Today the M2 macrophages are identified based on the expression pattern of a set of M2...

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Main Author: Tamás Rőszer
Format: Article
Language:English
Published: Wiley 2015-01-01
Series:Mediators of Inflammation
Online Access:http://dx.doi.org/10.1155/2015/816460
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author Tamás Rőszer
author_facet Tamás Rőszer
author_sort Tamás Rőszer
collection DOAJ
description The alternatively activated or M2 macrophages are immune cells with high phenotypic heterogeneity and are governing functions at the interface of immunity, tissue homeostasis, metabolism, and endocrine signaling. Today the M2 macrophages are identified based on the expression pattern of a set of M2 markers. These markers are transmembrane glycoproteins, scavenger receptors, enzymes, growth factors, hormones, cytokines, and cytokine receptors with diverse and often yet unexplored functions. This review discusses whether these M2 markers can be reliably used to identify M2 macrophages and define their functional subdivisions. Also, it provides an update on the novel signals of the tissue environment and the neuroendocrine system which shape the M2 activation. The possible evolutionary roots of the M2 macrophage functions are also discussed.
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spelling doaj-art-f563692c21774361abc57e66664bac142025-02-03T05:58:46ZengWileyMediators of Inflammation0962-93511466-18612015-01-01201510.1155/2015/816460816460Understanding the Mysterious M2 Macrophage through Activation Markers and Effector MechanismsTamás Rőszer0Institute for Comparative Molecular Endocrinology, Center of Biomedical Research, University of Ulm, Helmholtzstrasse 8/1, 89081 Ulm, GermanyThe alternatively activated or M2 macrophages are immune cells with high phenotypic heterogeneity and are governing functions at the interface of immunity, tissue homeostasis, metabolism, and endocrine signaling. Today the M2 macrophages are identified based on the expression pattern of a set of M2 markers. These markers are transmembrane glycoproteins, scavenger receptors, enzymes, growth factors, hormones, cytokines, and cytokine receptors with diverse and often yet unexplored functions. This review discusses whether these M2 markers can be reliably used to identify M2 macrophages and define their functional subdivisions. Also, it provides an update on the novel signals of the tissue environment and the neuroendocrine system which shape the M2 activation. The possible evolutionary roots of the M2 macrophage functions are also discussed.http://dx.doi.org/10.1155/2015/816460
spellingShingle Tamás Rőszer
Understanding the Mysterious M2 Macrophage through Activation Markers and Effector Mechanisms
Mediators of Inflammation
title Understanding the Mysterious M2 Macrophage through Activation Markers and Effector Mechanisms
title_full Understanding the Mysterious M2 Macrophage through Activation Markers and Effector Mechanisms
title_fullStr Understanding the Mysterious M2 Macrophage through Activation Markers and Effector Mechanisms
title_full_unstemmed Understanding the Mysterious M2 Macrophage through Activation Markers and Effector Mechanisms
title_short Understanding the Mysterious M2 Macrophage through Activation Markers and Effector Mechanisms
title_sort understanding the mysterious m2 macrophage through activation markers and effector mechanisms
url http://dx.doi.org/10.1155/2015/816460
work_keys_str_mv AT tamasroszer understandingthemysteriousm2macrophagethroughactivationmarkersandeffectormechanisms