In order to find candidate proteins that are potentially associated with the phenotype in neonatal rat cardiomyocytes treated with phenylephrine(PE), the differential proteins expression pattern after α-adrenergic receptor stimulation in neonatal cardiomyocytes was analyzed by using a series of methods,including two dimensional polyacrylamide gel electrophoresis,PDQuest 2-DE software analysis and peptide mass fingerprint mapping based on MALDI-TOF-MS.The good two-dimensional pattern with a high resolution and reproducibility was obtained.Totally 14 differential protein spots were found. Out of these,11 proteins were preliminarily identified.Desmin,Txndc5,etc.were found to be up-regulated in PE-treated cardiomyocytes,while caspase-11, 4-hydroxyphenylpyruvic acid dioxygenase,etc.were found to be down-regulated.It suggests that the differential expression analysis of proteome may be useful to the further study of the related proteins and the molecular markers of cardiovascular diseases.
Impact of air pollution on cardiovascular d is eases has been established. As the main source of city air pollution, particulat e matter has been demonstrated an independent correlation with incidence and mor tality of cardiovascular diseases. The mechanisms are not clear. Several plausib le mechanistic pathways have been described, including inflammation induced by o xidative stress, the followed enhanced coagulation/thrombosis resulted in instab ility of atherosclerosis, the promotion of ischemic heart diseases and imbalance of autonomic nerve tone resulted in the occurrence of arrhythmia. The article p rovides a review of the mechanisms on air pollution and cardiovascular diseases and suggestions for further research.
目的通过microRNA芯片筛选不同基底刚度影响宫颈癌细胞迁移过程中的关键microRNA的候选者。方法用丙烯酰胺及双丙烯酰胺的不同比例配置基底刚度为1、20 k Pa的人工基底膜,在其上种植宫颈癌细胞系Siha,36 h后收取细胞提取总RNA,用microRNA芯片及qRT-PCR方法筛选2种基底刚度条件下的差异表达microRNA。结果在2种不同刚度条件下生长的宫颈癌细胞系Siha共有173个表达差异的microRNA,其中包括70个表达上调的microRNA和103个表达下调的microRNA。在宫颈癌细胞系Siha、Hela、Caski中,检测与宫颈癌细胞迁移相关的miR-21、miR-125a、miR-75b、miR-150、miR-595、miR-218、miR-200b、miR-107、miR-183等表达与microRNA芯片结果一致。结论不同基底刚度可引起宫颈癌细胞系Siha的microRNA表达谱不同,microRNA在基底刚度调控宫颈癌细胞迁移的过程中可能具有重要作用。
