成骨细胞参与骨髓造血微环境的构建及发挥调控作用

ROLE OF OSTEOBLASTS IN THE HEMATOPOIETIC MICROENVIRONMENT OF BONE MARROW AND REGULATORY PATHWAYS AND MECHANISMS

目的对成骨细胞参与骨髓造血微环境的构建并在其中发挥调控作用的研究进展进行综述。方法广泛查阅近年国内外相关文献,对成骨细胞作为骨髓造血微环境的主要成分、对破骨细胞、造血干细胞细胞周期和相关黏附因子,以及细胞因子的调控研究进展进行回顾性总结与分析。结果成骨细胞是成熟个体中骨髓造血微环境的关键构成成分。成骨细胞通过细胞受体-配体的信号传导、细胞因子、细胞黏附及对其他参与构建骨髓造血微环境中的细胞的调控作用,将原始造血干细胞维持在静止状态,保持了其自我更新,多向分化的干细胞特性。结论对成骨细胞与骨髓造血微环境相互作用的进一步研究,为造血干细胞的临床移植应用提供了更好的理论基础。

Objective To review the research progress of osteoblasts in the hematopoietic microenvironment of bone marrow and regulatory pathways and mechanisms. Methods The advances in the osteoblasts as crucial components for hematopoietic microenvironment in bone marrow, regulation to osteoblasts and hematopoietic stem cells （HSCs）, and correlative singal pathways and mechanisms were introduced based on the recent related literature. Results Evidence indicates that osteoblasts are crucial components of the hematopoietic microenvironments in adult bone marrow. The osteoblasts maintain the quiescence of primitive HSCs by the signaling receptors-ligands, secreted cell factors and cell-adhesion molecules and by regulating other cells in the niche. The quiescent primitive HSCs persist stem cell characteristic which has unlimited selfrenewal and multipotent differentiation potential. Conelusion The further understanding of the relationship between osteoblasts and hematopoietic microenvironment should lead to development of new strategies directed toward clinical therapeutics of HSCs transplantation.