申请人:——
公开号:US20020120098A1
公开(公告)日:2002-08-29
The present invention is directed to compositions comprising heme-containing components and to methods that stimulate erythropoiesis comprising administration of a composition of the invention, such as purified hemoglobin. Surprisingly, heme-containing components such as hemoglobin can induce erythropoiesis in the presence of decreased concentrations of erythropoietin (Epo) and, in fact, functions synergistically with Epo. Further, heme-containing components can be used alone or in conjunction with Epo for the treatment of anemias and other disorders due to decreases in erythropoietin or iron. It has been discovered that, in the presence of Epo, both hemoglobin and cross-linked hemoglobin can compensate for the reduction in erythroid cell growth and differentiation that occurs in the presence of reduced concentrations of Epo. The effect is specific to erythropoiesis, as evidenced by a lack of growth of non-erythroid progenitors such as CFU-GM.
本发明涉及包含含血红素成分的组合物,以及通过服用本发明组合物(如纯化血红蛋白)刺激红细胞生成的方法。令人惊奇的是,血红蛋白等含血红素成分能在促红细胞生成素(Epo)浓度降低的情况下诱导红细胞生成,事实上,还能与 Epo 发挥协同作用。此外,含血红素成分可单独使用,也可与 Epo 结合使用,用于治疗因促红细胞生成素或铁减少而引起的贫血症和其他疾病。研究发现,在 Epo 存在的情况下,血红蛋白和交联血红蛋白都能补偿因 Epo 浓度降低而导致的红细胞生长和分化的减少。这种作用对红细胞生成具有特异性,非红细胞祖细胞(如 CFU-GM)不生长就证明了这一点。