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第 5 期      陶叶杏 等:广陈皮中黄酮类化合物提取物对 t-BHP 诱导 HepG2 细胞氧化损伤保护作用机制                               167

                   在正常生理状态下,Nrf2与Keap1以二聚体的形                   [3] FU M Q,ZOU B,AN K J,et al.Anti-asthmatic activity of alka⁃
                                                                    loid compounds from Pericarpium Citri Reticulatae(Citrus retic⁃
               式定位于细胞质中;而一旦受到外界刺激,Nrf2 就会
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               与 Keap1 发生解离,从细胞质转移进至细胞核中,并                     [4] YE X L,CAO D,SONG F Y,et al. Preparative separation of
               与 ARE 作用,激活下游一系列抗氧化酶的表达                   [17] 。     nine flavonoids from Pericarpium Citri Reticulatae by prepara⁃
               本研究表明,在 PCR-C10F 干预下,Nrf2 转录因子的                      tive-HPLC and HSCCC[J].Separation science and technology,
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               表达在基因和蛋白水平上均显著上调,而且能够促
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                                                                    antioxidant evaluation[J].Critical reviews in food science and nu⁃
               来发挥抗氧化活性作用           [18] ,这与本研究结果一致。                trition,2022,62(14):3833-3854.
               此外,PCR-C10F 使细胞保护蛋白 NQO1、GSTO1、                 [7] SUZUKI T,YAMAMOTO M.Stress-sensing mechanisms and
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               并下调 HO-1 的表达。与本研究结果一致的是,甜橙                           16824.
               皮水提取物以及其主要成分橙皮苷、橘皮素和川陈                          [8] NITURE S K,KHATRI R,JAISWAL A K. Regulation of
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               GSH-Px 和 CAT 的表达来抵御氧化应激损伤。而
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               且,研究表明当 HepG2 细胞暴露于氧化剂的氧化应                           noids as activators of Nrf2-mediated defense system:structure-ac⁃
               激损伤下,HO-1的 mRNA 水平和蛋白表达水平均上                          tivity relationship and inhibition of intracellular oxidative insults
                                                                    [J].Bioorganic & medicinal chemistry,2018,26(18):5140-5150.
               调 [20] ,黄酮类化合物可以减弱氧化剂诱导的 HO-1的                  [10] LIANG F Q,FANG Y J,CAO W W,et al.Attenuation of tert-
               表达水平    [21] 。由此可见,PCR-C10F 通过促进 Nrf2                butyl hydroperoxide (t-BHP) -induced oxidative damage in
               转 移 入 核 ,激 活 Nrf2-ARE 抗 氧 化 信 号 通 路 下 游              HepG2 cells by tangeretin:relevance of the Nrf2-ARE and
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               NQO1、SOD1、GSTO1 和 GSH-Px 4 种 抗 氧 化 酶
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               mRNA 和蛋白的表达,下调应激反应蛋白 HO-1的表                     [11] YU Q,TAO Y X,HUANG Y T,et al.Aged Pericarpium Citri
               达,减轻细胞的氧化应激损伤,发挥抗氧化活性。                               Reticulatae‘Chachi’attenuates oxidative damage induced by
                                                                    tert-butyl hydroperoxide(t-BHP)in HepG2 cells[J/OL].Foods
                   综上所述,陈皮在陈化过程中多甲氧基黄酮类
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               化合物含量呈现增加的趋势,而且其抗氧化活性也                               doi.org/ 10.3390/foods11030273.
               随之增强,而且川陈皮素的积累可能是主要的因素。 [12] WU Y,CHEN Z,DARWISH W S,et al.Choline and ethanol⁃
               PCR-C10F表现出较强的抗氧化活性,能够通过调控                           amine plasmalogens prevent lead-induced cytotoxicity and lipid
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               Nrf2-ARE 抗氧化通路下游抗氧化酶 mRNA 和蛋白
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               从而发挥抗氧化活性,为陈皮发挥间接抗氧化活性                               and periodic regulation of cancer cells by polyphenols produced
                                                                    by the fermentation of grape skin by Lactobacillus plantarum
               作用机制的研究提供了理论基础,进而为陈皮的合
                                                                    KFY02[J/OL].Biomolecules,2019,9(10):575[2022-05-22].
               理贮藏及使用提供一定的理论依据。本研究由于只                               https://doi.org/10.3390/biom9100575.
               选取了同一产地同一果园的样本,而且不同年份的                          [14] YANG M,JIANG Z D,WEN M C,et al. Chemical variation of
                                                                    Chenpi(Citrus peels)and corresponding correlated bioactive com⁃
               样本量有限,还需进一步扩充样品的品种来源及年
                                                                    pounds by LC-MS metabolomics and multibioassay analysis[J/
               份深入开展研究。                                             OL].Frontiers in nutrition,2022,9:825381[2022-05-22].https://
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