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Fibroblast growth factor 1 is produced prior to apolipoprotein E in the astrocytes after cryo-injury of mouse brain.

机译:小鼠脑冷冻损伤后,星形胶质细胞中的载脂蛋白E产生于成纤维细胞生长因子1。

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摘要

We recently reported that fibroblast growth factor 1 (FGF-1) upregulates apolipoprotein E (apoE) synthesis and its secretion as high density lipoprotein (HDL) in cultured astrocytes potentially by an autocrine or paracrine mechanism [Biochim. Biopys. Acta 1589 (2002) 261]. In order to examine pathophysiological relevance of this reaction, we studied association of the production of FGF-1 and apoE in the post-injury mouse brain. After the spot-injury of the brain by liquid nitrogen, the surface size of the wound shrunk more rapidly in the C57BL/6 wild-type mice than the apoE-knock out C57BL/6 mice. Immunohistochemical analysis of the lesions revealed that production of FGF-1 was identified in the reactive astrocytes by the day 2 after the injury in both types of mouse, prior to the production of apoE confirmed by the day 4 in the wild-type. These findings were consistent with our in-vitro observations and hypothesis that FGF-1 upregulates apoE synthesis and subsequently HDL production in the reactive astrocytes by an autocrine or paracrine manner. FGF-1 thus would exert its effect after the CNS damage through apoE secretion.
机译:我们最近报道,成纤维细胞生长因子1(FGF-1)可能通过自分泌或旁分泌机制上调了星形胶质细胞中载脂蛋白E(apoE)的合成及其分泌为高密度脂蛋白(HDL)[Biochim。 Biopys。 1589(2002)261]。为了检查此反应的病理生理相关性,我们研究了损伤后小鼠脑中FGF-1和apoE产生的关联。在液氮对脑部造成局部损伤之后,与apoE敲除C57BL / 6小鼠相比,C57BL / 6野生型小鼠的伤口表面收缩更快。病变的免疫组织化学分析显示,在两种类型的小鼠受伤后第2天,在反应型星形胶质细胞中均已鉴定出FGF-1的产生,而在野生型中则在第4天确认了apoE的产生。这些发现与我们的体外观察和假说一致,即FGF-1通过自分泌或旁分泌方式在反应性星形胶质细胞中上调apoE合成,进而上调HDL的产生。因此,FGF-1将通过apoE分泌在中枢神经系统受损后发挥作用。

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