摘要
Adenine is commonly used to establish the animal models for chronic kidney injury and its renal interstitial fibrosis. As an endogenous substance, adenine-induced kidney damage has not yet been fully studied and elucidated, except for inflammatory reaction. Here we analyzed the proteomics of kidney of rats after adenine overloading using LS-MS/MS assay, and observed the role of anemoside B4(B4). The results showed that adenine could down-regulate 285 proteins and up-regulate 164 proteins in rat kidney tissue compared with the normal group. Down-regulated proteins mainly affected related pathways, such as energy metabolism, while up-regulated proteins affected inflammatory response pathways and metabolic pathways. B4 could significantly reverse the down-regulation of about 40 proteins, which were involved in mitochondria, redox processes, extracellular exosomes, acetylation and other signaling pathways. Simultaneously, B4 could inhibit the up-regulation of five proteins caused by adenine, which were involved in cell cycle, oocyte meiosis, PI3 K-Akt and other signaling pathways. Further experimental results of mRNA expression using real-time PCR assay supported the proteomic analysis. Therefore, we proposed that the damage of rat kidney caused by adenine was more complicated, not only with an inflammatory reaction, but also with extensive effects to various metabolic processes in the body. This work provided a valuable clue for comprehensive understanding of adenine-induced renal damage.
腺嘌呤常常用于制作慢性肾损伤及其肾间质纤维化的动物模型。除了炎性损伤之外,作为内源性物质的腺嘌呤对肾脏的损害尚未得到充分研究和阐明。为此,我们利用LC-MS/MS技术对腺嘌呤负荷后大鼠肾脏的蛋白质组学进行了分析,并观察了anemoside B4(B4)的作用。结果表明,腺嘌呤与正常组相比可以下调285个基因,上调大鼠肾组织中的164个基因。下调基因主要影响能量代谢的通路,而上调基因则影响炎症反应途径和其它一些代谢途径。B4可以显著逆转下调基因中的40个基因,这些基因涉及线粒体、氧化还原过程、细胞外外泌体、乙酰化和其他信号传导途径。同时,B4可明显抑制由腺嘌呤引起的6个上调基因,主要涉及细胞周期、卵母细胞减数分裂、PI3K-Akt等信号通路。使用实时定量PCR方法对其中一些基因进行mRNA表达,其结果也与蛋白质组学分析结果基本一致。因此可见,由腺嘌呤引起的大鼠肾损伤更复杂,不仅与炎症反应有关,而且对身体各种代谢过程有广泛影响。该工作为全面了解腺嘌呤诱导的肾损伤提供了有价值的线索。
基金
National Innovative Drugs 13th Five-Year Major Special Project of China(Grant No.2018ZX09301030-002)
