A new organotypic model containing dermal-type macrophages

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Human skin equivalents (SEs) are popular three-dimensional (D) cell culture systems in fundamental and applied dermatology. They have been made to contain dendritic cells, but so far no study on the incorporation of potentially anti-inflammatory dermal macrophages has been performed. Here, we show that monocyte-derived dermal-type macrophages can be introduced into a rigid scaffold with dermal fibroblasts. They maintain their cell surface markers CD163, DC-SIGN/CD209 and HLA-DR, which discriminate them from monocytes and dendritic cells. They retain the ability to produce the anti-inflammatory cytokine IL-10 in response to lipopolysaccharide (LPS) and to phagocytose latex beads. We thus demonstrate the feasibility of creating macrophage–fibroblast 3D cultures as a first step towards generating SEs with dermal macrophages.

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