Macrophages have two major roles in regulating the dynamic equilibrium in erythropoiesis, promoting the differentiation and maturation of nucleated red blood cells into reticulocytes and removing old red blood cells. A recent mouse study has demonstrated that the phenotype of macrophages in erythroblastic islands is CD169+ VCAM-1+ ER-HR3+ CD11b+ F4/80+ Ly-6G+. Molecular connections between erythroid progenitor cells and central macrophages help to maintain the function and integrity of erythroblastic islands. New research advances in Kruppel-like factor 1 (KLF1) provide new evidence for the important role of macrophages in erythroblastic islands. Macrophages play an important role in erythropoiesis both in sickness and in health, and provide a potential targeted therapy for diseases such as polycythemia vera and beta-thalassemia in the future.
巨噬细胞在红系生成的动态平衡中, 主要作用是促进有核红细胞分化成熟为网织红细胞, 并清除衰老的红细胞。近期的小鼠实验证明, 红系造血岛中的巨噬细胞特异性表型为CD169+ VCAM-1+ ER-HR3+CD11b+ F4/80+ Ly-6G+。红系祖细胞与中央巨噬细胞的分子连接能够保证红系造血岛的功能性和完整性。红系Kruppel样因子1(KLF1)的研究新进展, 为造血岛巨噬细胞的重要作用提供了新的依据。而无论在健康或者疾病状态, 巨噬细胞在红系生成中都发挥着重要的作用, 为将来治疗真性红细胞增多症及β-地中海贫血等疾病提供了一种潜在的靶向治疗方法。