Essential role of B-Raf in oligodendrocyte maturation and myelination during postnatal central nervous system development.
Essential role of B-Raf in oligodendrocyte maturation and myelination during postnatal central nervous system development.
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B-RAF在产后中枢神经系统发育过程中B-RAF在少突胶质细胞成熟和髓鞘中的重要作用。
DOI:
10.1083/jcb.200709069
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发表时间:
2008-03-10
期刊:
影响因子:
--
通讯作者:
Baccarini M
中科院分区:
文献类型:
--
作者:
Galabova-Kovacs G;Catalanotti F;Matzen D;Reyes GX;Zezula J;Herbst R;Silva A;Walter I;Baccarini M
Mutations in the extracellular signal-regulated kinase (ERK) pathway, particularly in the mitogen-activated protein kinase/ERK kinase (MEK) activator B-Raf, are associated with human tumorigenesis and genetic disorders. Hence, B-Raf is a prime target for molecule-based therapies, and understanding its essential biological functions is crucial for their success. B-Raf is expressed preferentially in cells of neuronal origin. Here, we show that in mice, conditional ablation of B-Raf in neuronal precursors leads to severe dysmyelination, defective oligodendrocyte differentiation, and reduced ERK activation in brain. Both B-Raf ablation and chemical inhibition of MEK impair oligodendrocyte differentiation in vitro. In glial cell cultures, we find B-Raf in a complex with MEK, Raf-1, and kinase suppressor of Ras. In B-Raf–deficient cells, more Raf-1 is recruited to MEK, yet MEK/ERK phosphorylation is impaired. These data define B-Raf as the rate-limiting MEK/ERK activator in oligodendrocyte differentiation and myelination and have implications for the design and use of Raf inhibitors.
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DOI:
10.1073/pnas.0507399103
发表时间:
2006-01-31
影响因子:
11.1
作者:
Galabova-Kovacs, G;Matzen, D;Baccarini, M
通讯作者:
Baccarini, M
影响因子:
4.2
作者:
Du, Yangzhou;Lercher, Lauren D.;Dreyfus, Cheryl F.
通讯作者:
Dreyfus, Cheryl F.
影响因子:
4.8
作者:
Kao, SC;Jaiswal, RK;Landreth, GE
通讯作者:
Landreth, GE
影响因子:
4.6
作者:
Kessaris, N;Jamen, F;Richardson, WD
通讯作者:
Richardson, WD
影响因子:
4.8
作者:
Fujioka, A;Terai, K;Matsuda, M
通讯作者:
Matsuda, M