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光动力疗法治疗肿瘤，临床上已证实有确切疗效，但其作用机理尚未完全阐明。中国医学科学院肿瘤研究所周传农研究员的课题组经十多年努力，通过动物实验与人膀眈癌组织等系统的超微结构研究，证明光动力作用主要是通过微血管内皮细胞损伤和微循环障碍引起局部缺血、缺氧，导致
Photodynamic therapy for the treatment of tumors has been clinically proven to have an exact therapeutic effect, but its mechanism of action has not yet been fully elucidated. The research group of Zhou Chuanong, a researcher at the Institute of Tumor Research, Chinese Academy of Medical Sciences, has worked hard for more than ten years. Through the ultrastructural studies of animal experiments and human bladder cancer tissues, it has been demonstrated that photodynamic effects are mainly caused by microvascular endothelial cell damage and microcirculatory disturbances. Ischemia, hypoxia, leading to