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Published byJudith Horton Modified over 9 years ago
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抑制 HO-1 增强 As2O3 对胶质瘤疗 效的实验研究 刘耀华 陈晓丰 梁元 郑秉杰 赵世光 哈尔滨医科大学附属第一医院 神经外科
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It was proved that subarachnoid injection of As 2 O 3 is safe.
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Intraoperative transplantation of Ommaya device (ACNU or ACNU+As 2 O 3 )
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Preoperation One year after operation 47 male, Grade Ⅲ - Ⅳ: Ommaya device (ACNU+As 2 O 3 ), Arterial chemotherapy (As 2 O 3 ), and Radiotherapy
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Recurrent glioma 6 months after the second operation 54 female, Grade Ⅲ : Ommaya device (ACNU+As 2 O 3 ), Arterial chemotherapy (As 2 O 3 ), and Radiotherapy
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47 female, Grade Ⅲ - Ⅳ : Ommaya device (ACNU+As 2 O 3 ), Arterial chemotherapy (As 2 O 3 ), and Radiotherapy Preoperation 2 years after operation
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Before operative MRI Preoperative CT CT one week after operative and the first chemotherapy Case3 MRI before operation CT one and half a year after operation 44 male, Grade Ⅲ : Ommaya device (ACNU+As 2 O 3 ), Arterial chemotherapy (As 2 O 3 ), and Radiotherapy
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国内外研究发现 As2O3 在实体肿瘤治疗受到限制,小剂量药物 不能达到治疗效果,而增大剂量往往增加药物毒性; As2O3 作用于细胞后不仅引起细胞毒性效应,同时还激活细胞 内一些保护性分子和信号通路; As2O3 诱导细胞凋亡的机制被认为主要是通过活性氧( ROS ) 的诱导而实现; ROS 可以诱导细胞保护性分子血红素加氧酶 -1(HO-1); HO-1 在胶质瘤中广泛表达; 抑制 HO-1 是否可以提高 As2O3 对胶质瘤的治疗效果? 三氧化二砷( As2O3 )与肿瘤治 疗 研究背景
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实验设计 胶质瘤细胞系 U251MG 用 As2O3 处理,检测细胞活 性、线粒体膜电位( MMP ),并观察 ROS 清除剂 LNAC 对细胞是否有保护作用; 检测 As2O3 诱导胶质瘤细胞 ROS 生成、 MAPK 信号 通路的活化, HO-1 的诱导以及 LNAC 对其影响; 使用 HO-1 的诱导剂和抑制剂处理细胞,观察其对 As2O3 效应的影响; Nrf2 是 HO-1 表达的重要转录因子, SiRNA 技术干扰 Nrf2 表达后对比细胞对 As2O3 的敏感性。
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Cell Viability ** P<0.01 compared with control; ▼ P<0.01 compared with LNAC untreated cells.
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Mitochondrial Membrane Potential
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Sub-G1 (PI Staining)
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ROS induction
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Downstreams of ROS
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Nrf2 Translocation
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Effects of HO-1 inducer * P<0.01
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Effects of HO-1 inducer * P<0.01
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Effects of HO-1 inhibitor * P<0.01 *
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Nrf2 GAPDH RandomNrf2 HO-1 -actin 0h 3h 6h Random 0h 3h 6h Nrf2 ATO (5uM) Knockdown of Nrf2
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* P<0.01
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Knockdown of Nrf2
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* P<0.01
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ATO ROSNrf2 activation Cell death HO-1 induction
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