首页> 外文会议>International ISA biomedical sciences instrumentation symposium;Annual rocky mountain bioengineering symposium >ROLE OF PLANT-DERIVED ANTIOXIDANTS ON NF-kB EXPRESSION IN LPS-STIMULATED MACROPHAGES
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ROLE OF PLANT-DERIVED ANTIOXIDANTS ON NF-kB EXPRESSION IN LPS-STIMULATED MACROPHAGES

机译:植物源抗氧化剂在脂多糖刺激的巨噬细胞中对NF-κB表达的作用

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The use of antioxidants has been shown to be beneficial in stimulating immune cells to increase phagocytosis and up-regulating the cellular processes to limit inflammation. Investigations into the specific mechanisms involved in the regulation of the inflammatory response in macrophages are broad; however, many researchers have found that regulating nuclear factor kappa B (NF-kB) may be a key component. The goal of this study was to assess the antioxidant potential of epigallocatechin-3-gallate (EGCG) (10μM) and thymoquinone (TQ) (10μM) on RAW 264.7 macrophages before and after being stimulated with lipopolysaccharide (LPS) (0.01 μg/mL). Our results showed that both EGCG and TQ, given individually, decreased NF-kB translocation in the nucleus when given before and after LPS stimulation. EGCG appeared to have the most impact on NF-kB in cells stimulated with LPS, but TQ was not as effective in inhibiting NF-kB in comparison to EGCG. The combination of EGCG and TQ showed a much higher level of NF-kB translocation compared to individual treatment, suggesting individual treatment may be more effective. In conclusion, we believe that EGCG and TQ may possibly block the upstream activation of mitogen activated protein kinase (MAPK) or inhibit the activity of the MAPK pathway, but further investigations are needed to understand the exact mechanisms of these observations.
机译:已经显示抗氧化剂的使用在刺激免疫细胞以增加吞噬作用和上调细胞过程以限制炎症方面是有益的。关于调节巨噬细胞炎症反应的具体机制的研究广泛。但是,许多研究人员发现调节核因子κB(NF-kB)可能是关键因素。这项研究的目的是评估脂多糖(LPS)(0.01μg/ mL)刺激前后的Epigallocatechin-3-gallate(EGCG)(10μM)和胸腺醌(TQ)(10μM)对RAW 264.7巨噬细胞的抗氧化能力)。我们的研究结果表明,单独给予EGCG和TQ,在LPS刺激之前和之后给予均可减少细胞核中NF-kB的移位。在用LPS刺激的细胞中,EGCG似乎对NF-kB的影响最大,但与EGCG相比,TQ在抑制NF-kB方面不那么有效。与单独治疗相比,EGCG和TQ的组合显示出更高水平的NF-kB易位,表明单独治疗可能更有效。总之,我们认为EGCG和TQ可能会阻止有丝分裂原活化蛋白激酶(MAPK)的上游激活或抑制MAPK途径的活性,但是需要进一步的研究以了解这些观察的确切机制。

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