心肌缺血区靶向机制及策略探讨
Mechanisms and strategies for targeting drugs to myocardial ischemic regions
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摘要:
缺血性心脏病严重危害着人类健康。目前, 虽然有很多抗心肌缺血的药物, 但大多缺乏组织特异性, 加上缺血区血液循环障碍, 药物在缺血区的分布往往很少。心肌缺血所引起的一些病理生理变化, 如内皮细胞膜通透性增加、内皮细胞腔侧膜上细胞黏附分子表达上调、胞内抗原成分外露、缺血区pH值下降等已被利用来实现药物的心肌缺血区靶向分布, 虽然都取得了一定的成功, 但仍急需寻找更为有效的靶向策略。本文综述并探讨了实现药物被动、主动和物理化学靶向于心肌缺血区的机制与策略。
Abstract:The ischemic heart disease has been endangering human health seriously. Although there are many kinds of anti-ischemic drugs, most of them are lacking in tissue specificity, which together with a remarkably reduced blood circulation in the ischemic zone often lead to a quite low drug distribution in the targets. Myocardial ischemia can cause a lot of pathophysiological changes, such as the enhanced permeability of the endothelial cell membrane, the up-regulated expression of various cell adhesion molecules on endothelium, the exposure of intracellular antigenic components, the decrease of pH within the ischemic zone, and so on. To date, some of these changes have been exploited with limited success to gain the passive, active and physicochemical targeting of diagnostic or therapeutic drugs to myocardial ischemic regions. However, more effective delivery strategies are still eagerly needed. Here, we reviewed and discussed the potential targeting-delivery mechanisms and strategies, used or may be used in the future, for myocardial ischemic regions.
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