Comparison of gene expression profiles between human and mouse monocyte subsets

MA Ingersoll, R Spanbroek, C Lottaz… - Blood, The Journal …, 2010 - ashpublications.org
MA Ingersoll, R Spanbroek, C Lottaz, EL Gautier, M Frankenberger, R Hoffmann, R Lang…
Blood, The Journal of the American Society of Hematology, 2010ashpublications.org
Blood of both humans and mice contains 2 main monocyte subsets. Here, we investigated
the extent of their similarity using a microarray approach. Approximately 270 genes in
humans and 550 genes in mice were differentially expressed between subsets by 2-fold or
more. More than 130 of these gene expression differences were conserved between mouse
and human monocyte subsets. We confirmed numerous of these differences at the cell
surface protein level. Despite overall conservation, some molecules were conversely …
Abstract
Blood of both humans and mice contains 2 main monocyte subsets. Here, we investigated the extent of their similarity using a microarray approach. Approximately 270 genes in humans and 550 genes in mice were differentially expressed between subsets by 2-fold or more. More than 130 of these gene expression differences were conserved between mouse and human monocyte subsets. We confirmed numerous of these differences at the cell surface protein level. Despite overall conservation, some molecules were conversely expressed between the 2 species' subsets, including CD36, CD9, and TREM-1. Other differences included a prominent peroxisome proliferator-activated receptor γ (PPARγ) signature in mouse monocytes, which is absent in humans, and strikingly opposed patterns of receptors involved in uptake of apoptotic cells and other phagocytic cargo between human and mouse monocyte subsets. Thus, whereas human and mouse monocyte subsets are far more broadly conserved than currently recognized, important differences between the species deserve consideration when models of human disease are studied in mice.
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