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首页> 外文期刊>Brain research >iTRAQ-based proteomic analysis after mesenchymal stem cell line transplantation for ischemic stroke
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iTRAQ-based proteomic analysis after mesenchymal stem cell line transplantation for ischemic stroke

机译:基于ITRAQ基于间充质干细胞系移植治疗缺血性卒中后的蛋白质组学分析

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摘要

Transplantation with mesenchymal stem cells (MSCs) has been reported to promote functional recovery in animal models of ischemic stroke. However, the molecular mechanisms underlying the therapeutic effects of MSC transplantation have been only partially elucidated. The purpose of this study was to comprehensively identify changes in brain proteins in rats treated with MSCs for ischemic stroke, and to explore the multi-target mechanisms of MSCs using a proteomics-based strategy. Twenty-eight proteins were found to be differentially expressed following B10 MSC transplantation in adult male Wistar rats, as assessed using isobaric tagging for relative and absolute protein quantification (iTRAQ). Subsequent bioinformatic analysis revealed that these proteins were mainly associated with energy metabolism, glutamate excitotoxicity, oxidative stress, and brain structural and functional plasticity. Immunohistochemical staining revealed decreased expression of EAAT1 in the phosphate-buffered saline group as opposed to normal levels in the B10 transplantation group. Furthermore, ATP levels were also significantly higher in the B10 transplantation group, thus supporting the iTRAQ results. Our results suggest that the therapeutic effects of B10 transplantation might arise from the modulation of the acute ischemic cascade via multiple molecular pathways. Thus, our findings provide valuable clues to elucidate the mechanisms underlying the therapeutic effects of MSC transplantation in ischemic stroke.
机译:据报道,用间充质干细胞(MSCs)移植促进缺血性卒中的动物模型中的功能恢复。然而,仅部分阐明了MSC移植治疗效果的分子机制。本研究的目的是全面识别用MSCs治疗缺血性卒中治疗的大鼠脑蛋白的变化,并利用基于蛋白质组学的策略来探讨MSCs的多目标机制。在成年雄性Wistar大鼠B10MSC移植物中发现二十八种蛋白质在成年雄性Wistar大鼠中进行差异表达,如使用异常标记用于相对和绝对蛋白质定量(ITRAQ)的评估。随后的生物信息分析显示,这些蛋白质主要与能量代谢,谷氨酸吞噬毒性,氧化应激和脑结构和功能可塑性有关。免疫组织化学染色显示EAAT1在磷酸盐缓冲盐碱中的表达下降,而不是B10移植组中的正常水平。此外,在B10移植组中,ATP水平也显着高,因此支持ITRAQ结果。我们的结果表明,B10移植的治疗效果可能来自通过多种分子途径的调节来源的急性缺血性脑级联。因此,我们的研究结果提供了有价值的线索,以阐明MSC移植在缺血性中风中的治疗作用的机制。

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