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低氧对肿瘤转移的促进作用 被引量:7

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摘要 恶性肿瘤组织内异常血管生成、血管灌注减少及肿瘤细胞无限制的生长,导致微环境中氧含量降低,称为低氧。这种现象在恶性肿瘤中广泛存在。低氧微环境会改变肿瘤细胞的代谢方式,诱导细胞代谢发生适应性变化,并调节肿瘤细胞中复杂的细胞信号通路如低氧诱导因子(HIF)、磷脂酰肌醇-3-羟激酶(PI3K)/蛋白激酶B(AKT)/雷帕霉素靶蛋白(MTOR)、丝裂原活化蛋白激酶(MAPK)和核因子-κB(NF-κB)通路。这些信号通路相互作用产生正反馈和负反馈作用,增强或减弱低氧效应。此外,低氧微环境通过上调与上皮-间充质转化(EMT)相关的转录因子或抑制因子来激活与EMT有关的信号通路,从而诱发EMT。本文对肿瘤低氧微环境和促进肿瘤转移的各种信号通路及基本机制进行综述。
作者 连烜晔 崔晶
出处 《癌症进展》 2019年第10期1139-1142,共4页 Oncology Progress
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