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    • 9. 发明申请
    • IGF-1 instructs multipotent adult CNS neural stem cells to an oligodendroglial lineage
    • IGF-1指导多能成人CNS神经干细胞向少突胶质细胞谱系
    • US20050148069A1
    • 2005-07-07
    • US10949017
    • 2004-09-24
    • Fred GageJenny Hsieh
    • Fred GageJenny Hsieh
    • C12N20060101C12N5/079C12N5/08
    • C12N5/0622C12N2501/105
    • Adult neural stem cells differentiate into neurons, astrocytes, and oligodendrocytes in the mammalian CNS, but the molecular mechanisms that control their differentiation are not yet well understood. Insulin-like growth factor-I (IGF-I) can promote the differentiation of cells already committed to an oligodendroglial lineage during development. However, it is unclear whether IGF-I affects multipotent neural stem cells. Here we show that IGF-I stimulates the differentiation of multipotent adult rat hippocampus-derived neural progenitor cells into oligodendrocytes. Modeling analysis indicates that the actions of IGF-I are instructive. Oligodendrocyte differentiation by IGF-I appears to be mediated through an inhibition of BMP signaling. Furthermore, overexpression of IGF-I in the hippocampus leads to an increase in oligodendrocyte markers. These data demonstrate the existence of a single molecule, IGF-I, that can influence the fate choice of multipotent adult neural progenitor cells to an oligodendroglial lineage.
    • 成年神经干细胞在哺乳动物CNS中分化为神经元,星形胶质细胞和少突胶质细胞,但是控制其分化的分子机制尚未明了。 胰岛素样生长因子-I(IGF-I)可以促进在发育期间已经致力于少突胶质细胞谱系的细胞的分化。 然而,IGF-I是否影响多能神经干细胞是不清楚的。 在这里我们显示IGF-I刺激多能成年大鼠海马源神经祖细胞分化为少突胶质细胞。 建模分析表明IGF-I的作用是有启发性的。 通过IGF-I的少突胶质细胞分化似乎通过抑制BMP信号传导。 此外,IGF-I在海马中的过表达导致少突胶质细胞标志物的增加。 这些数据表明存在可以影响多能成年神经祖细胞对少突神经胶质谱系的命运选择的单分子IGF-I。