a Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences , Tehran , Iran.
b Research Group on Community Nutrition and Oxidative Stress (NUCOX) and CIBEROBN (Physiopathology of Obesity and Nutrition CB12/03/30038), University of Balearic Islands , Palma de Mallorca , Spain.
Crit Rev Clin Lab Sci. 2019 May;56(3):182-199. doi: 10.1080/10408363.2019.1575333. Epub 2019 Mar 1.
Autophagy is an important biological mechanism involved in the regulation of numerous fundamental cellular processes that are mainly associated with cellular growth and differentiation. Autophagic pathways are vital for maintaining cellular homeostasis by enhancing the turnover of nonfunctional proteins and organelles. Neuronal cells, like other eukaryotic cells, are dependent on autophagy for neuroprotection in response to stress, but can also induce cell death in cerebral ischemia. Recent studies have demonstrated that autophagy may induce neuroprotection following acute brain injury, including ischemic stroke. However in some special circumstances, activation of autophagy can induce cell death, playing a deleterious role in the etiology and progression of ischemic stroke. Currently, there are no therapeutic options against stroke that demonstrate efficient neuroprotective abilities. In the present work, we will review the significance of autophagy in the context of ischemic stroke by first outlining its role in ischemic neuronal death. We will also highlight the potential therapeutic applications of pharmacological modulators of autophagy, including some naturally occurring polyphenolic compounds that can target this catabolic process. Our findings provide renewed insight on the mechanism of action of autophagy in stroke together with potential neuroprotective compounds, which may partially exert their function through enhancing mitochondrial function and attenuating damaging autophagic processes.
自噬是一种重要的生物学机制,参与调节许多基本的细胞过程,主要与细胞生长和分化有关。自噬途径对于维持细胞内稳态至关重要,通过增强无功能蛋白质和细胞器的周转率来实现。神经元细胞与其他真核细胞一样,依赖自噬来应对应激时的神经保护,但也会在脑缺血中诱导细胞死亡。最近的研究表明,自噬可能在急性脑损伤后诱导神经保护,包括缺血性中风。然而,在某些特殊情况下,自噬的激活会诱导细胞死亡,在缺血性中风的病因和进展中发挥有害作用。目前,没有针对中风的治疗方法具有有效的神经保护能力。在本研究中,我们将通过概述自噬在缺血性神经元死亡中的作用,首先综述自噬在缺血性中风中的意义。我们还将强调自噬的药理学调节剂的潜在治疗应用,包括一些可以靶向这种分解代谢过程的天然存在的多酚化合物。我们的研究结果为自噬在中风中的作用机制以及潜在的神经保护化合物提供了新的见解,这些化合物可能部分通过增强线粒体功能和减轻破坏性自噬过程来发挥其功能。