
现代肿瘤医学2012年8月第20卷第8期
MODERN ONCOLOGY,Aug. 2012,VOL, 20,NO. 08
的靶点之一[9]。当细胞受到氧化应激刺激时,Nrf2与ARE 相结合,形成Nrf2-ARE通路以维持体内的氧化还原平衡。 Nrf2-ARE通路是迄今为止发现的最为重要的内源性抗氧化应激通路。
GSH是体内重要的抗氧化剂和自由基清除剂,可把机体内有害的毒物转化为无害的物质,排泄出体外,细胞内CSH 含量是反映Nrf2活化的重要指标之一;SOD是一种存在于细胞液中的抗氧化酶,可清除超氧阴离子,保护细胞免受超氧阴离子损伤,其值高低可以反映机体清除氧自由基的能力。Valentina Rubio等[10]研究表明,激活Nr2-ARE通路,可以上调细胞内CSH、SOD水平,从而增强细胞拮抗氧化还原损伤的能力。
在本次实验中,As,O,组,其Nrf2、ARE、GSH、SOD的表达水平,明显比对照组少,心肌存活力也较对照组和姜黄素组弱,说明As,0,对大鼠的心肌细胞有一定的毒性作用;而姜黄素组因姜黄索激活了Nr2-ARE通路,CSH、SOD表达水平显著上调,对心肌细胞起到保护作用,使其心肌存活力明显提高。因而证实了Nrf2-ARE通路的激活可提高细胞内 GSH,SOD的水平,有效拮抗As,O,对心肌细胞的氧化损伤。
综上所述,Nr2-ARE通路在抵抗外来刺激、保护机体功能中发挥着极其重要的作用,姜黄素激活Nrf2-ARE后能有效拮抗心肌细胞氧化损伤,为As,O,治疗各种类型白血病引起心肌毒性的预防和治疗提供新的靶点和思路,使其发挥更佳疗效。
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亚砷酸对JAK2V617F阳性的骨髓增殖性肿瘤的影响
庞
绥,蔡晓东,刘
凌,周旭红
(编投:徐萌)
TheinfluenceofarsenictrioxideintreatmentofJAK2V6l7Fpositivemyoloproliferaneoplasm PANG Ying,CAI Xiaodong, LIU Ling,ZHOU Xuhong
Department of Hematology, The Second Afiliated Hospital of Guangzhou Medical College, Guangdong Guangzhou 510260, China.
[Abstract]
Objective:To evaluate the treatment effect of arsenic trioxide (ATO) in JAK2V617F positive myelo
proliferative neoplasm ( MPN) patients. Methods: Twenty cases with JAK2V617F positive MPD patients were treated with arsenic trioxide, compared with the control group treated with hydroxyurea. The hemogram and the expression levels of JAK2 V617F were evaluated before and after the treatment, Results: The average red blood cell, white blood cell, platelets were significantly decreased in 3 months, 1 year after treated with arsenic trioxide, compared with the control group( P <0. 01). No significant hemogram changes were found in 3 years after treatment ( P > 0. 05) be-
No obvious difference in JAK2 V617F negative conversion ratio between the two groups.
tween thetwo groups.
收稿日期】【修回日期】【基金项目】【作者单位】【作者简介】
2012 02 22 2012 02 27
广东省中医药管理局科研课题(编号;2008363);广州市中医药科研立项课题(编号:2008A54)广州医学院第二附属医院血液科,广东广州510260
庞缨(1968-),男,广东广州人,主任医师,主要从事血液病临床及实验研究工作。E-mail:pyldh@yahoo.com.cn