于春磊, 徐天娇, 张晓杰, 董妙先, 牛英才. 基于“有故无殒”莪术对正常和血瘀证小鼠毒性差异机制的研究J. 药学学报, 2019,54(2): 329-334. doi: 10.16438/j.0513-4870.2018-0819
引用本文: 于春磊, 徐天娇, 张晓杰, 董妙先, 牛英才. 基于“有故无殒”莪术对正常和血瘀证小鼠毒性差异机制的研究J. 药学学报, 2019,54(2): 329-334. doi: 10.16438/j.0513-4870.2018-0819
YU Chun-lei, XU Tian-jiao, ZHANG Xiao-jie, DONG Miao-xian, NIU Ying-cai. Differential mechanism of toxicity in normal and blood-stasis mice following Rhizoma Curcumae exposure based on “YOU-GU-WU-YUN” theoryJ. Acta Pharmaceutica Sinica, 2019,54(2): 329-334. doi: 10.16438/j.0513-4870.2018-0819
Citation: YU Chun-lei, XU Tian-jiao, ZHANG Xiao-jie, DONG Miao-xian, NIU Ying-cai. Differential mechanism of toxicity in normal and blood-stasis mice following Rhizoma Curcumae exposure based on “YOU-GU-WU-YUN” theoryJ. Acta Pharmaceutica Sinica, 2019,54(2): 329-334. doi: 10.16438/j.0513-4870.2018-0819

基于“有故无殒”莪术对正常和血瘀证小鼠毒性差异机制的研究

Differential mechanism of toxicity in normal and blood-stasis mice following Rhizoma Curcumae exposure based on “YOU-GU-WU-YUN” theory

  • 摘要: 为了明确正常和血瘀证的孕鼠子代莪术神经发育毒性的差异及其生物机制,采用冰水浸入法制备寒凝血瘀证小鼠模型,雌性小鼠随机分为正常对照组、血瘀证对照组、正常+莪术(2.5、5、10 g·kg-1)组、血瘀证+莪术(2.5、5、10 g·kg-1)组、血瘀证Nrf2敲除组、血瘀证Nrf2敲除+莪术(10 g·kg-1)组、正常+tBHQ(Nrf2的激动剂)组和正常+莪术(10 g·kg-1)+tBHQ组,共12组。交配成功的莪术暴露组小鼠于妊娠期第5~18天灌胃给予莪术水煎液。行为学方法检测子代小鼠断崖回避达标日龄,分光光度法检测子代小鼠脑组织谷胱甘肽(glutathione,GSH)含量,实时定量PCR检测子代小鼠脑组织Nrf2、谷氨酸半胱氨酸连接酶催化亚基(glutamate cysteine ligase catalytic subunit,GCLc)和修饰亚基(glutamate cysteine ligase modifier subunit,GCLm)mRNA表达,蛋白质印迹法检测子代小鼠脑组织Nrf2、GCLc和GCLm蛋白表达。动物福利和实验过程均遵循齐齐哈尔医学院动物伦理委员会的规定执行。结果显示,正常小鼠灌胃莪术水煎液(10.0 g·kg-1)导致子代断崖回避达标日龄显著延长(P<0.05),而血瘀证小鼠子代无显著差异(P>0.05)。与正常对照组比较,血瘀证孕小鼠显著增加子代脑组织GSH含量、GCLc、Nrf2 mRNA和蛋白表达(均P<0.05),而莪术处理对GSH含量、GCLc、Nrf2 mRNA和蛋白表达并没有影响(均P>0.05)。Nrf2基因敲除显著延长血瘀证孕小鼠子代断崖回避的达标日龄(P<0.05)。总之,莪术对正常小鼠子代神经发育毒性效应较血瘀证小鼠明显,Nrf2分子参与莪术“有故无殒”现象。

     

    Abstract: We were interested in ascertaining differences in developmental neurotoxicity in normal and blood-stasis pregnant mice administered orally Rhizoma Curcumae and the underlying molecular biology mechanisms of any differences. To answer these questions, a blood stasis model was induced by being immersion in ice water. C57BL/6 mice with blood stasis, normal C57BL/6 mice, Nrf2 knock out (KO) mice with blood stasis were randomized into control groups and Rhizoma Curcumae exposure groups. The pregnant mice were administered Rhizoma Curcumae during pregnant day 5 to day 18. The neurodevelopment reflex was examined by the positive occurring time of avoidance precipice reflex tests. Measurement of glutathione (GSH) in brain of the offspring was performed by colorimetric assays. Transcription factor NF-E2-related factor 2 (Nrf2), glutamate cysteine ligase catalytic subunit (GCLc), and glutamate cysteine ligase modifier subunit (GCLm) mRNA and protein expression in brain of the offspring were examined by real-time RT-PCR and Western blot, respectively. All animal care and experiments procedures were reviewed and approved by the Animal Care and Use Committee of Qiqihar Medical College. Our results demonstrated for the first time evidence that C57BL/6 mice treated with Rhizoma Curcumae (10.0 g·kg-1) extended the positive occurring time of avoidance precipice reflex tests of offspring mice compared with the normal control group (P<0.05). We could not find any significant change in that of blood-stasis pregnant mice offspring compared with the normal control group (P>0.05). Compared with the normal control group, level of glutathione, mRNA and protein expression of Nrf2, GCLc, and GCLm significantly increased in brain of the offspring of blood-stasis pregnant mice (all P<0.05). However, mice treated with Rhizoma Curcumae (10.0 g·kg-1) did not change those of offspring (all P>0.05). Knock out Nrf2 using CRISPR/Cas9 extended the positive occurring time of avoidance precipice reflex tests of offspring of blood-stasis pregnant mice (P<0.05). To conclude, developmental neurotoxicity of the blood-stasis pregnant mice to Rhizoma Curcumae was weaker than that of the normal pregnant mice. Cold-induced Nrf2 activation has important roles in "YOU-GU-WU-YUN" phenomenon of Rhizoma Curcumae.

     

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