MRC1 and asthma: Alternatively activated macrophages (M2 macrophages) express several proallergic factors, such as CD206, Ym‐1,4 Relm‐α, and chemokines such as macrophage inflammatory protein (MIP)‐1α, MIP‐1β, and MIP‐2,5, 6 which contribute to airway inflammation and remodeling in asthma.7, 8