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吗啡对大鼠肝脏蛋白质及核酸分解代谢关键酶基因表达的影响

付海英,洪 敏*, 高 琳,周 航,张莲芝   

  1. 吉林大学基础医学院生物化学与分子生物学教研室,吉林 长春130021
  • 收稿日期:2004-01-28 修回日期:1900-01-01 出版日期:2004-11-28 发布日期:2004-11-28
  • 通讯作者: 洪 敏

Effects of morphine on gene expression of key enzymes forprotein and nucleic acid catabolism in rat liver

FU Hai-ying, HONG Min*,GAO Lin, ZHOU Hang, ZHANG Lian-zhi   

  1. Department of Biochemistry and Molecular Biology,School of BasicMedical Sciences, Jilin University,Changchun 130021,China
  • Received:2004-01-28 Revised:1900-01-01 Online:2004-11-28 Published:2004-11-28
  • Contact: HONG Min

摘要: 目的:阐明在转录水平上吗啡对大鼠肝脏谷氨酸脱氢酶(GLDH)及腺苷脱氨酶(ADA)的影响。 方法:50只清洁级成年雌性Wistar大鼠,体重(200±20)g,随机分为5组:生理盐水对照组(对照组)、3 d吗啡组(吗啡Ⅰ组)、7 d吗啡组(吗啡Ⅱ组)、自然停药3 d组(停药Ⅰ组)及自然停药7 d组(停药Ⅱ组),每组10只。各组动物分别于实验结束次日早8:30处死,采集肝脏组织并提取肝脏总RNA,以看家基因β-肌动蛋白(β-actin)为内参对照,采用逆转录聚合酶链反应(RT-PCR)法分析吗啡给药及停药后大鼠蛋白质分解代谢酶GLDH和核酸分解代谢酶ADA基因表达的变化。 结果:吗啡Ⅰ、Ⅱ组及停药Ⅰ、Ⅱ组大鼠肝脏GLDH mRNA含量分别为对照组的1.02、1.09、1.16及1.46倍,吗啡给药大鼠肝脏中GLDH基因表达随给药时间延长而持续增强,自然停药一定时间内大鼠肝脏中GLDH mRNA含量仍持续增高;吗啡Ⅰ、Ⅱ组及停药Ⅰ、Ⅱ组大鼠肝脏ADA mRNA含量分别为对照组的2.65、1.89、1.18及0.87倍,吗啡Ⅰ、Ⅱ组大鼠肝脏ADA的基因表达均比对照组明显增高,自然停药后大鼠肝脏ADA表达逐渐下降,停药7 d时下降至接近对照组水平。结论:吗啡可以诱导大鼠肝脏GLDH及ADA基因的表达。

关键词: 蛋白质及核酸, 分解代谢, 基因表达, 谷氨酸脱氢酶, 腺苷脱氨酶

Abstract: Objective To explain the effects of morphine on glutamate dehydrogenase (GLDH) and adenosine deaminase (ADA) in rat liver at a transcriptional level. Methods Fifty adult female Wistar rats, weighed (200±20)g, were randomly divided into 5 groups (10 in each group): control group ( injected saline for 7 days), morphine group Ⅰ and Ⅱ(injected morphine for 3 and 7 days, respectively), withdrawal group Ⅰ and Ⅱ (fed normally for 3 and 7 days separately following 7 days of morphine injection). The rat liver mRNA were extracted by RT-PCR, gene expressions of GLDH and ADA were analyzed after administration and after withdrawal. Results The GLDH mRNA contents in morphine group Ⅰ, Ⅱ and withdrawal group Ⅰ,Ⅱ were 1.02,1.09,1.16, and 1.46- fold of that in control group, respectively. The GLDH gene expression showed a continuing reinforcing trend after morphine injection compared with control group, even after drug withdrawal. The ADA mRNA contents in morphine group Ⅰ, Ⅱ and withdrawal group Ⅰ, Ⅱ were 2.65,1.89,1.18, and 0.87-fold of that in control group dividedly. The ADA gene expression increased after morphine injection and fell gradually after withdrawal. Conclusion Morphine can induce gene expressions of GLDH and ADA in rat liver.

Key words: protein and nucleic acid, catabolism, gene expression, glutamate dehydrogenase, adenosine deaminase

中图分类号: 

  • R996