甲氨蝶呤对大鼠尿液蛋白质组的影响

Effect of methotrexate on the urinary proteome of rats

摘要:

甲氨蝶呤是常见的免疫抑制剂，曾被大剂量用于治疗癌症，近年来其被小剂量用于治疗类风湿性关节炎。文中尝试研究甲氨蝶呤对大鼠尿蛋白质组的影响。大鼠口服甲氨蝶呤构造用药模型，再收集大鼠10 h内的尿液，并且采用液相色谱串联质谱（liquid chromatography tandem mass spectrometry，LC-MS/MS）分析大鼠的尿蛋白。总共鉴定到31个差异蛋白，其中7个蛋白与甲氨蝶呤药物作用和类风湿性关节炎症状有关。部分大鼠的生物学过程反映了甲氨蝶呤对机体谷胱甘肽代谢以及对JAK/STAT信号通路的影响。结果显示，尿蛋白具有反映甲氨蝶呤对大鼠机体影响的能力。对单个大鼠个体差异蛋白的分析体现出不同个体对该药物的反应有较大差异。

Abstract:

Methotrexate (MTX) is a widely used immunosuppressive drug. Large-dose of MTX is used for the treatment of cancer while low-dose is used for the treatment of rheumatoid arthritis (RA). This study aimed to explore the effect of MTX on the urinary proteome of rats. MTX was given to rats orally to construct an MTX intragastric administration rat model. The urine of the rats were collected within 10 hours after giving MTX, and the urine proteins of the rats were analyzed by liquid chromatography tandem mass spectrometry (LC-MS/MS). A total of 31 differential proteins were identified, of which 7 proteins were related to the effect MTX and the symptom of RA. The biological processes of some rats reflected the effect of MTX on the body's glutathione metabolism and the JAK/STAT signaling pathway, which indicated that urine proteins have the ability to reflect the effects of MTX on the body of rats. The spectrum of the differential proteins of each single rat showed that different individuals respond to the drug quite differently.