造血干细胞是一类能够自我更新和多向分化的原始细胞群,主要分布于骨髓,也有少部分分布于循环血。在造血干细胞研究这一领域,过去对循环血中造血干细胞的研究较少,直至七十年代才渐渐活跃起来。为了对造血干细胞群体有一个较全面的了解,本文就循环血造血干细胞的性能作简要的综述。 Hematopoietic stem cells are a group of primitive cell populations that can self-renew and differentiate into multiple directions, mainly in the bone marrow and a small part in circulating blood. In the field of hematopoietic stem cell research, there have been few studies of hematopoietic stem cells in circulating blood in the past, and only gradually became active in the seventies. In order to have a more comprehensive understanding of the hematopoietic stem cell population, this article briefly reviews the properties of circulating hematopoietic stem cells.