CD163 and systemic lupus erythematosus: Our data showed that the elevation of mMer on CD14+ monocyte/macrophages was accompanied by the increased expression of CD163, which defined the CD14+CD163+ subset as the main CD14+ monocyte/macrophage population with elevated mMer expression, and mMer expression in the immune-regulatory CD14+CD16+ subset also increased in SLE.