5-aminosalicylic acid （mesalamine） rarely induces hyper- sensitivity reactions. If chest pain associated with atypical electrocardiographic changes are seen during its administration, one should always bear in mind ...5-aminosalicylic acid （mesalamine） rarely induces hyper- sensitivity reactions. If chest pain associated with atypical electrocardiographic changes are seen during its administration, one should always bear in mind type I variant of Kounis syndrome. This variant includes patients, of any age, with normal coronary arteries, without predisposing factors for coronary artery disease, in whom the acute release of inflammatory mediators from mast cells can induce either sudden coronary artery narrowing, without increase of cardiac enzymes and troponins, or coronary artery spasm that progresses to acute myocardial infarction, with elevated cardiac enzymes and troponins.展开更多
文摘目的本研究采用对大鼠急性及慢性水杨酸盐腹腔注射建立耳鸣动物模型,通过检测大鼠耳蜗核中肿瘤坏死因子α(TNF-α),白介素-1β(IL-1β),白介素6(IL-6)以及NMDA受体亚基(NR2B)m RNA及其蛋白的表达,了解慢性水杨酸盐诱导的耳鸣动物耳蜗核中是否出现炎症因子表达的改变,以探讨炎症因子在耳鸣中的作用。方法实验动物随机分为4组,按给药时间分别为:正常对照组、急性注射2小时组、慢性注射14天组、停药后恢复14天组。各组大鼠断头处死后迅速分离出耳蜗核;采用SYBR Green实时荧光定量PCR(real-time reverse transcriptase polymerase chain reaction,real-time RT-PCR)及Western blot(蛋白质印迹)方法,检测各组大鼠耳蜗核TNF-α,IL-1β,IL-6及NR2B基因m RNA及其蛋白的表达,观察各组间的差异。结果(1)在慢性注射14天组,TNF-α和NR2B m RNA及其蛋白表达水平较正常对照组、急性注射2小时组、停药后恢复14天组高,且差异有统计学意义(p<0.05);急性注射2小时组、慢性注射14天组、停药后恢复14天组IL-1βm RNA水平较正常组高,慢性注射14天组、停药后恢复14天组IL-1β蛋白水平较正常组高,差异有统计学意义(p<0.05);IL-6 m RNA及其蛋白表达水平在四组之间无明显差异;(2)TNF-α和NR2B m RNA表达具有明显的正相关(p<0.01);IL-1β和NR2B m RNA表达无明显正相关(p>0.05)。结论(1)长期注射水杨酸盐可能通过上调耳蜗核中TNF-α,IL-1β和NR2B基因表达导致大鼠耳鸣;(2)TNF-α和NR2B可能在水杨酸盐诱发耳鸣的过程中起协同作用。
文摘5-aminosalicylic acid （mesalamine） rarely induces hyper- sensitivity reactions. If chest pain associated with atypical electrocardiographic changes are seen during its administration, one should always bear in mind type I variant of Kounis syndrome. This variant includes patients, of any age, with normal coronary arteries, without predisposing factors for coronary artery disease, in whom the acute release of inflammatory mediators from mast cells can induce either sudden coronary artery narrowing, without increase of cardiac enzymes and troponins, or coronary artery spasm that progresses to acute myocardial infarction, with elevated cardiac enzymes and troponins.
