Tissue-resident macrophages
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TLDR
The tissue niche-specific factors that dictate cell phenotype are discussed, which will allow new strategies to promote the restoration of tissue homeostasis and explain why simplified models of macrophage activation do not explain the extent of heterogeneity seen in vivo.Abstract:
Tissue-resident macrophages are a heterogeneous population of immune cells that fulfill tissue-specific and niche-specific functions. These range from dedicated homeostatic functions, such as clearance of cellular debris and iron processing, to central roles in tissue immune surveillance, response to infection and the resolution of inflammation. Recent studies highlight marked heterogeneity in the origins of tissue macrophages that arise from hematopoietic versus self-renewing embryo-derived populations. We discuss the tissue niche-specific factors that dictate cell phenotype, the definition of which will allow new strategies to promote the restoration of tissue homeostasis. Understanding the mechanisms that dictate tissue macrophage heterogeneity should explain why simplified models of macrophage activation do not explain the extent of heterogeneity seen in vivo.read more
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The M1 and M2 paradigm of macrophage activation: time for reassessment.
TL;DR: How cytokines and pathogen signals influence macrophages' functional phenotypes and the evidence for M1 and M2 functions is assessed and a paradigm initially based on the role of a restricted set of selected ligands in the immune response is revisited.
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TL;DR: This Perspective explores and explains the fundamental dogma of nanoparticle delivery to tumours and answers two central questions: ‘ how many nanoparticles accumulate in a tumour?’ and ‘how does this number affect the clinical translation of nanomedicines?'
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Macrophage plasticity, polarization, and function in health and disease.
Abbas Shapouri-Moghaddam,Saeed Mohammadian,Hossein Vazini,Mahdi Taghadosi,Seyed-Alireza Esmaeili,Fatemeh Mardani,Bita Seifi,Asadollah Mohammadi,Jalil Tavakol Afshari,Amirhossein Sahebkar +9 more
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A lineage of myeloid cells independent of Myb and hematopoietic stem cells
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TL;DR: Schulz et al. as discussed by the authors investigated whether adult macrophages all share a common developmental origin and found that a population of yolk-sac-derived, tissue-resident macophages was able to develop and persist in adult mice in the absence of hematopoietic stem cells.
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