A neuronal cell surface heparan sulfate proteoglycan is required for dorsal root ganglion neuron stimulation of Schwann cell proliferation.

A neuronal cell surface heparan sulfate proteoglycan is required for dorsal root ganglion neuron stimulation of Schwann cell proliferation.
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DOI:
10.1083/jcb.101.3.744
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发表时间:
1985-09
影响因子:
7.8
通讯作者:
GLASER, L
GLASER, L
中科院分区:
生物学1区
文献类型:
--
作者:
RATNER, N;BUNGE, RP;GLASER, L

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背根神经节神经元的轴突在其表面上表达一种或多种对雪旺细胞有丝分裂原的蛋白质(Salzer,J.,R. P. Bunge和L. Glaser,1980,J. Cell Biol.,84:767-778)。背根神经节神经元和雪旺细胞与4-甲基伞形酮基-β-D-木糖苷(蛋白聚糖生物合成的抑制剂)的共培养物的孵育使雪旺细胞的促有丝分裂反应降低超过95%。β-D-木糖苷的作用已经定位于神经元;用抑制剂预处理神经元而不是雪旺细胞会导致促有丝分裂反应的显著降低。此外,用β-D-木糖苷处理的许旺细胞仍然对可溶性许旺细胞有丝分裂原(霍乱毒素和神经胶质生长因子)有丝分裂反应。用肝素酶处理的神经元和从肝素酶处理的神经元制备的膜囊泡显示施万细胞的有丝分裂原性降低,而其他蛋白聚糖裂解酶没有影响。我们得出结论,细胞表面硫酸乙酰肝素蛋白聚糖是背根神经节神经元表面上存在的许旺细胞有丝分裂原的一个组成部分。
Axons of dorsal root ganglion neurons express on their surfaces one or more proteins which are mitogenic for Schwann cells (Salzer, J., R. P. Bunge, and L. Glaser, 1980, J. Cell Biol., 84:767-778). Incubation of co-cultures of dorsal root ganglion neurons and Schwann cells with 4- methylumbelliferyl-beta-D-xyloside, an inhibitor of proteoglycan biosynthesis, decreases the mitogenic response of the Schwann cell by over 95%. The effect of the beta-D-xyloside has been localized to the neurons; pretreatment of neurons but not of Schwann cells with the inhibitor causes a marked reduction of the mitogenic response. In addition, Schwann cells treated with beta-D-xyloside are still mitogenically responsive to soluble Schwann cell mitogens (cholera toxin and glial growth factor). Neurons treated with heparitinase and membrane vesicles prepared from heparitinase-treated neurons show diminished mitogenicity for Schwann cells, while other proteoglycan lyases have no effect. We conclude that a cell surface heparan sulfate proteoglycan is a component of the Schwann cell mitogen present on the surface of dorsal root ganglion neurons.
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