小鼠骨髓 内皮细胞无血清条件培养液及其超滤组分对粒巨噬系祖细胞？…

本研究通过传代培养小鼠骨髓内皮细胞系细胞,惧无血清条件培养液（ｍＢＭＥＣ－ＣＭ）,将其作多级串联超滤,获得分子量大于１０、３￣１０、１￣３、０．５￣１ｋＤ和小于０．５ｋＤ超滤组分。进行粒巨噬系造血祖细胞集落形成试验。检测了它们的ｍＢＭＥＣ－ＣＭ和３￣１０组分对粒巨噬系祖细胞（ＣＦＵ－ＧＭ）生长未见明显影响,而分子量大于１０ｋＤ和０．５￣１ｋＤ组分促进ＣＦＵ－ＧＭ的增殖,分子量１￣３ｋＤ和小于０．５

Effects of bone marrow endothelial cell conditioned medium and its ultrafiltration-prepared components on the growth of CFU-GM

In this study, we obtained the serum-free conditioned medium from subcultures of murine bone-marrow-derived endothelial cell line which has been established recently by ourselves. And then, molecular weight (MW) > 10 kD, 3-10 kD, 1-3 kD, 0.5-1 kD and < 0.05 kD components were sifted out from the conditioned medium (mBMEC-CM) by means of serial ultrafiltration. Assays of granulocyte-macrophage colony-forming cell (CFU-GM) were performed to examine the effects of mBMEC-CM and its ultrafiltration-prepared components. It was not observed that mBMEC-CM and MW 3-10 kD component had any significant influence on the growth of CFU-GM. However, MW > 10 kD and 0.5-1 kD components enhanced the proliferation of CFU-GM, whereas MW 1-3 kD and < 0.5 kD ones inhibited it. All these four components exerted their effects on the growth of CFU-GM in dose-dependent way. Our observations suggest that under the conditions of in vitro, murine bone marrow endothelial cells produce several active components which have promoting or inhibitory effects on the growth of CFU-GM.