Cell Report:阻断氧气传感分子PHD2可抑制乳腺癌的转移

2015-07-31 sunshine 译 MedSci原创

比利时鲁汶大学研究人员发现,降低氧气传感分子PHD2的表达可削弱乳腺癌转移(扩散)到身体其他部位的能力。乳腺癌是女性癌症死亡的第二大死因,主要死于癌细胞的转移。这些表明,抑制PHD2可能在治疗乳腺癌方面具有潜在的价值。该研究成果发表于 Cell Reports。本研究首次检测了自发性乳腺癌模型(相比于以往的移植性肿瘤与人类癌症更相似)中阻断PHD2表达的作用。该研究还发现了基质成纤维细胞(支持并


比利时鲁汶大学研究人员发现,降低氧气传感分子PHD2的表达可削弱乳腺癌转移(扩散)到身体其他部位的能力。乳腺癌是女性癌症死亡的第二大死因,主要死于癌细胞的转移。这些表明,抑制PHD2可能在治疗乳腺癌方面具有潜在的价值。该研究成果发表于 Cell Reports。

本研究首次检测了自发性乳腺癌模型(相比于以往的移植性肿瘤与人类癌症更相似)中阻断PHD2表达的作用。该研究还发现了基质成纤维细胞(支持并促进癌细胞扩散的细胞)意想不到的作用。

Peter Carmeliet研究团队发现,PHD2的基因阻断可大幅减少乳腺癌的转移。尽管改善了乳腺癌的治疗方法,但是开发有效的治疗方法以阻断乳腺癌的转移仍是个巨大的挑战。他们的研究还表明,与以往并不理想的肿瘤模型实验结果相反,阻断PHD2的表达并不会促进肿瘤的生长,因此采用此方法治疗是安全的。

研究表明,抑制PHD2减少癌细胞扩散的两种机制:通过规范化肿瘤血管和抑制“肿瘤激活成纤维细胞”的激活。肿瘤中,PHD2支持成纤维细胞变得异常活跃,位于结缔组织之下,作为癌细胞的“高速公路”允许癌细胞扩散至远隔器官。然而,大多数的抗癌疗法都是针对癌细胞而非其相邻细胞——肿瘤激活成纤维细胞。事实上,并没有单一的治疗方法抑制这些成纤维细胞的活性以抑制癌细胞的转移。

Peter Carmeliet说道:“我们发现阻断PHD2 氧传感器以减少癌细胞转移的方式有两种:一是,阻断后有助于肿瘤中的血管恢复正常状态以减小癌细胞穿越血管壁的机会。二是,阻断后可切断“高速公路”防止癌细胞借助邻近激活成纤维细胞扩散。”

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    2016-06-06 智智灵药
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    2015-09-20 zhangxingru
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    2015-08-02 lmm402
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    2015-07-31 DocterSunshine

    PHD与肿瘤缺氧微环境是相关的

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Cancer Cell:阻断氧气传感分子PHD2可显著降低化疗副作用

比利时鲁汶大学研究人员证实了他们的假设:通过阻断氧气传感分子(oxygen sensor)PHD2让血管恢复正常能够让化疗更加有效。他们也第一次证实这种策略能够降低化疗给健康器官带来的副作用。 化疗的有效性因人们很难运送抗癌药物到肿瘤中而受到较大限制。肿瘤的特征在于血管形状异常:它们的形状不规则,质地松软而且容易撕裂。这些有漏洞的血管阻止抗癌药物到达肿瘤细胞,同时促进癌症转移。另外,化疗能够对健