IGF-I instructs multipotent adult neural progenitor cells to become oligodendrocytes.

IGF-I instructs multipotent adult neural progenitor cells to become oligodendrocytes.
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DOI:
10.1083/jcb.200308101
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发表时间:
2004-01-05
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Gage FH
Gage FH
中科院分区:
其他
文献类型:
--
作者:
Hsieh J;Aimone JB;Kaspar BK;Kuwabara T;Nakashima K;Gage FH

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成体多能神经祖细胞可以分化为哺乳动物中枢神经系统中的神经元、星形胶质细胞和少突胶质细胞,但控制其分化的分子机制尚不清楚。胰岛素样生长因子 I (IGF-I) 可以促进发育过程中已定型为少突胶质细胞谱系的细胞的分化。然而,尚不清楚 IGF-I 是否影响多能神经祖细胞。在这里,我们证明 IGF-I 刺激多能成年大鼠海马源性神经祖细胞分化为少突胶质细胞。模型分析表明 IGF-I 的作用具有指导意义。 IGF-I 的少突胶质细胞分化似乎是通过抑制骨形态发生蛋白信号传导来介导的。此外,海马中 IGF-I 的过度表达会导致少突胶质细胞标记物的增加。这些数据证明了单分子 IGF-I 的存在,它可以影响多能成体神经祖细胞向少突胶质细胞谱系的命运选择。
Adult multipotent neural progenitor cells can differentiate into neurons, astrocytes, and oligodendrocytes in the mammalian central nervous system, 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 progenitor 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 bone morphogenetic protein 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.
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