Adipose tissue macrophages in non-rodent mammals: a comparative study

Grace Ampem, Hind Azegrouz, Árpád Bacsadi, Lajos Balogh, Susanne Schmidt, Julianna Thuróczy, Tamás Röszer

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The stromal vascular fraction (SVF) of adipose tissue in rodents and primates contains mesenchymal stem cells and immune cells. SVF cells have complex metabolic, immune and endocrine functions with biomedical impact. However, in other mammals, the amount of data on SVF stem cells is negligible and whether the SVF hosts immune cells is unknown. In this study, we show that the SVF is rich in immune cells, with a dominance of adipose tissue macrophages (ATMs) in cattle (Bos primigenius taurus), domestic goat (Capra aegagrus hircus), domestic sheep (Ovis aries), domestic cat (Felis catus) and domestic dog (Canis familiaris). ATMs of these species are granulated lysosome-rich cells with lamellipodial protrusions and express the lysosome markers acid phosphatase 5 (ACP-5) and Mac-3/Lamp-2. Using ACP-5 and Mac-3/Lamp-2 as markers, we additionally detected ATMs in other species, such as the domestic horse (Equus ferus caballus), wild boar (Sus scrofa) and red fox (Vulpes vulpes). Feline and canine ATMs also express the murine macrophage marker F4/80 antigen. In the lean condition, the alternative macrophage activation marker CD206 is expressed by feline and canine ATMs and arginase-1 by feline ATMs. Obesity is associated with interleukin-6 and interferon gamma expression and with overt tyrosine nitration in both feline and canine ATMs. This resembles the obesity-induced phenotype switch of murine and human ATMs. Thus, we show, for the first time, that the presence of ATMs is a general trait of mammals. The interaction between the adipose cells and SVF immune cells might be evolutionarily conserved among mammals.

Original languageEnglish
Pages (from-to)461-478
Number of pages18
JournalCell And Tissue Research
Volume363
Issue number2
DOIs
Publication statusPublished - Feb 1 2016

Keywords

  • Adipose tissue
  • Alternative activation
  • Inflammation
  • Macrophages
  • Mammals
  • Metabolism

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology
  • Cell Biology

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  • Cite this

    Ampem, G., Azegrouz, H., Bacsadi, Á., Balogh, L., Schmidt, S., Thuróczy, J., & Röszer, T. (2016). Adipose tissue macrophages in non-rodent mammals: a comparative study. Cell And Tissue Research, 363(2), 461-478. https://doi.org/10.1007/s00441-015-2253-1