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Biology 2015, 4(4), 881-906; doi:10.3390/biology4040881

Biology of Bony Fish Macrophages

1
Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2E9, Canada
2
Department of Biological Sciences, George Washington University, Washington, DC 20052, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Brian Dixon
Received: 26 October 2015 / Revised: 20 November 2015 / Accepted: 24 November 2015 / Published: 30 November 2015
(This article belongs to the Special Issue Current Understanding of Fish Immune Systems)
View Full-Text   |   Download PDF [498 KB, uploaded 30 November 2015]   |  

Abstract

Macrophages are found across all vertebrate species, reside in virtually all animal tissues, and play critical roles in host protection and homeostasis. Various mechanisms determine and regulate the highly plastic functional phenotypes of macrophages, including antimicrobial host defenses (pro-inflammatory, M1-type), and resolution and repair functions (anti-inflammatory/regulatory, M2-type). The study of inflammatory macrophages in immune defense of teleosts has garnered much attention, and antimicrobial mechanisms of these cells have been extensively studied in various fish models. Intriguingly, both similarities and differences have been documented for the regulation of lower vertebrate macrophage antimicrobial defenses, as compared to what has been described in mammals. Advances in our understanding of the teleost macrophage M2 phenotypes likewise suggest functional conservation through similar and distinct regulatory strategies, compared to their mammalian counterparts. In this review, we discuss the current understanding of the molecular mechanisms governing teleost macrophage functional heterogeneity, including monopoetic development, classical macrophage inflammatory and antimicrobial responses as well as alternative macrophage polarization towards tissues repair and resolution of inflammation. View Full-Text
Keywords: teleost; macrophages; antimicrobial; cytokine; respiratory burst; nitric oxide; nutrient depravation teleost; macrophages; antimicrobial; cytokine; respiratory burst; nitric oxide; nutrient depravation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Hodgkinson, J.W.; Grayfer, L.; Belosevic, M. Biology of Bony Fish Macrophages. Biology 2015, 4, 881-906.

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