天津医药 ›› 2023, Vol. 51 ›› Issue (12): 1321-1325.doi: 10.11958/20230722

• 实验研究 • 上一篇    下一篇

木犀草素对白血病K562/ADR细胞多药耐药的逆转作用及机制研究

周欣宇1(), 李京敏2, 张婷1, 贾秀红1,()   

  1. 1.滨州医学院附属医院儿科(邮编256603)
    2.滨州医学院基础医学院人体解剖学教研室
  • 收稿日期:2023-05-18 修回日期:2023-07-20 出版日期:2023-12-15 发布日期:2023-12-22
  • 通讯作者: E-mail:jiaxiuhong001@163.com
  • 作者简介:周欣宇(1995),女,硕士在读,主要从事白血病的发病机制及治疗方面研究。E-mail:zhouxinyu002x@163.com
  • 基金资助:
    山东省自然科学基金资助项目(ZR2014HL032);山东省医药卫生科技发展计划项目(2017WS038)

Study on the mechanism of luteolin reversing multidrug resistance in leukemia K562/ADR cells

ZHOU Xinyu1(), LI Jingmin2, ZHANG Ting1, JIA Xiuhong1,()   

  1. 1. Department of Pediatrics, Binzhou Medical University Hospital, Binzhou 256603, China
    2. Department of Human Anatomy, Basic Medical College, Binzhou Medical University
  • Received:2023-05-18 Revised:2023-07-20 Published:2023-12-15 Online:2023-12-22
  • Contact: E-mail:jiaxiuhong001@163.com

摘要:

目的 探究木犀草素(Lut)对慢性髓系白血病K562/ADR细胞多药耐药性的逆转作用及其机制。方法 K562和K562/ADR细胞经不同浓度阿霉素(ADR)处理24 h后,采用CCK-8实验检测K562/ADR细胞耐药倍数。Lut单独或联合ADR作用K562/ADR细胞24 h后,采用CCK-8实验检测Lut的细胞毒性及对ADR的增敏作用。取对数生长期K562/ADR细胞分为0 μmol/L Lut组、2 μmol/L Lut组、4 μmol/L Lut组,采用流式细胞术检测细胞内ADR蓄积量的变化;RT-PCR法和Western blot法分别检测核因子E2相关因子2(Nrf2)、多药耐药相关蛋白1(MRP1)、P-糖蛋白(P-gp)、谷胱甘肽-S-转移酶pi(GST-pi)mRNA和蛋白的表达;谷胱甘肽(GSH)试剂盒检测细胞内GSH的含量。结果 与K562细胞相比,K562/ADR细胞株对ADR具有明显的耐药性,耐药倍数为53.69倍。与0 μmol/L Lut相比,不同浓度Lut作用于K562/ADR细胞后,细胞生长均受到不同程度的抑制(P<0.05),其中2、4 μmol/L Lut对K562/ADR细胞的增殖抑制率<10%,为无毒性的Lut浓度。与0 μmol/L Lut组相比,2、4 μmol/L Lut组可明显增强ADR对K562/ADR的细胞增殖抑制率,增加细胞内ADR蓄积量,提高逆转耐药倍数,降低细胞内GSH含量,下调细胞中MRP1、P-gp、GST-pi、Nrf2 mRNA及蛋白的表达(P<0.05);且4 μmol/L Lut作用效果较2 μmol/L Lut更显著。结论 Lut可抑制K562/ADR细胞增殖,逆转其对ADR的耐药性,其机制可能与Lut下调Nrf2、MRP1、P-gp、GST-pi表达,进而增加细胞内ADR蓄积量有关。

关键词: 白血病, 髓系, 慢性, BCR-ABL阳性, 木犀草素, 抗药性, 多药, 核因子E2相关因子2, 多药耐药相关蛋白1, P-糖蛋白, 谷胱甘肽-S-转移酶pi

Abstract:

Objective To investigate the mechanism of luteolin′s (Lut) reversal effect on multidrug resistance of chronic myeloid leukemia K562/ADR cells. Methods CCK-8 assay was used to detect drug resistance in K562 and K562/ADR cells 24 hours after treatment with different doses of adriamycin (ADR). CCK-8 assay was used to assess the cytotoxicity and sensitizing effect of Lut on ADR after K562/ADR cells were treated with Lut alone or in combination with ADR for 24 hours. K562/ADR cells in logarithmic growth phase were separated into three group: 0 μmol/L Lut, 2 μmol/L and 4 μmol/L Lut groups. ADR accumulation in cells was measured using flow cytometry. Nuclear factor erythroid-2-related factor 2 (Nrf2), multidrug resistance associated protein 1 (MRP1), P-glycoprotein (P-gp) and glutathione-S-transferase-PI (GST-pi) mRNA and protein expressions were identified using RT-PCR and Western blot assay. Glutathione (GSH) kit was used to detect intracellular GSH content. Results Compared with K562 cells, K562/ADR cell line was significantly resistant to ADR, and the drug resistance was 53.69 times. K562/ADR cell proliferation was decreased to variable degrees by different doses of Lut when compared to the 0 μmol/L Lut group (P<0.05). The proliferation inhibition rates of K562/ADR cells treated with 2 and 4 μmol/L Lut were less than 10%, indicating that the concentration of Lut was non-toxic. Compared with the 0 μmol/L Lut group, the 2 μmol/L Lut group and the 4 μmol/L Lut group showed significantly increased ADR growth inhibition rate on K562/ADR and increased accumulation of ADR in cells, improved the reversal resistance fold, and decreased GSH content in cells. MRP1, P-gp, GST-pi and Nrf2 mRNA and protein expression were reduced in cells (P<0.05). The effect of 4 mol/L Lut was greater than that of 2 mol/L Lut. Conclusion Lut may decrease K562/ADR cell proliferation and reverse ADR medication resistance. The mechanism could be connected to the downregulation of Nrf2, MRP1, P-gp and GST-pi expression, which leads to an increase in ADR accumulation in K562/ADR cells.

Key words: leukemia, myelogenous, chronic, BCR-ABL positive, Luteolin, drug resistance, multiple, nuclear factor erythroid2-related factor 2, multidrug resistance associated protein 1, P-glycoprotein, glutathione-S-transferase-PI

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