内质网应激(ERS)是细胞内一种适应性保护机制,但持续存在或过强时则最终诱导细胞凋亡,造成组织损伤.缺血/再灌注(I/R)时ATP耗竭、钙超载及大量自由基生成等因素诱导过度ERS导致组织损伤.缺血预处理可激发适当的ERS,增强细胞耐受后续长时间缺血刺激的能力,延缓或减轻I/R造成的组织损伤.
ER stress(ERS) is aimed initially at compensating for damage but can eventually trigger cell death if ER dysfunction is severe or prolonged. ERS is intensively induced in ischemia/reperfusion (I/R) by glucose starvation, Ca^2+ disturbance, oxidative stress, and so on. Ischemic preconditioning can relieve I/R injury, owing to the proper ERS induced in advance.