Cell Death Dis:紫杉醇可诱导淋巴管内皮细胞自噬促进癌症转移

2020-02-06 QQY MedSci原创

乳腺癌的细胞毒性疗法可以抑制原发肿瘤的生长,但会促进前哨淋巴结通过淋巴系统转移。但目前关于一线化疗对淋巴管内皮细胞的作用的研究还很少。在本研究中,研究人员发现紫杉醇,一种已批准用于治疗转移性或局部晚期乳腺癌的抗癌药物,可以诱导淋巴管内皮细胞(LEC)发生自噬来促进转移。虽然紫杉醇治疗在抑制LEC粘附方面的作用非常显著,但对细胞的存活并没有影响。紫杉醇通过诱导非Akt磷酸化自噬通路进而抑制LEC的迁

乳腺癌的细胞毒性疗法可以抑制原发肿瘤的生长,但会促进前哨淋巴结通过淋巴系统转移。但目前关于一线化疗对淋巴管内皮细胞的作用的研究还很少。

在本研究中,研究人员发现紫杉醇,一种已批准用于治疗转移性或局部晚期乳腺癌的抗癌药物,可以诱导淋巴管内皮细胞(LEC)发生自噬来促进转移。

虽然紫杉醇治疗在抑制LEC粘附方面的作用非常显著,但对细胞的存活并没有影响。紫杉醇通过诱导非Akt磷酸化自噬通路进而抑制LEC的迁移及分支点的形成。

在体内,紫杉醇能够介导淋巴管内皮细胞对肿瘤细胞表现出更高的通透性,而这种作用能够被自噬溶酶体抑制剂氯喹所逆转。

虽然紫杉醇可明显地减小肿瘤体积,但其会显著增加前哨淋巴结的转移。这种作用仅限于淋巴转移过程,类似于化学疗法不影响血液内皮细胞。

综上所述,该研究主要揭示了淋巴系统通过自噬的方式抵抗化疗,进而促进治疗恶性进展及转移病灶的形成。本研究为开发新的减少转移瘤数目的联合疗法提供了理论基础。

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    2020-12-20 维他命
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    2020-02-08 amyloid
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    2020-02-08 cy0328
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    2020-02-07 thm112988

    0

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