Annexin A1-suppressed autophagy promotes nasopharyngeal carcinoma cell invasion and metastasis by PI3K/AKT signaling activation.

Annexin A1-suppressed autophagy promotes nasopharyngeal carcinoma cell invasion and metastasis by PI3K/AKT signaling activation.
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膜联蛋白 A1 抑制自噬通过 PI3K/AKT 信号激活促进鼻咽癌细胞侵袭和转移

DOI:
10.1038/s41419-018-1204-7
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发表时间:
2018-11-20
影响因子:
9
通讯作者:
Xiao ZQ
Xiao ZQ
中科院分区:
生物学1区
文献类型:
--
作者:
Zhu JF;Huang W;Yi HM;Xiao T;Li JY;Feng J;Yi H;Lu SS;Li XH;Lu RH;He QY;Xiao ZQ

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膜联蛋白A1(ANXA 1)在各种肿瘤中失调。然而,ANXA 1在癌症中的作用和机制知之甚少。在这项研究中,我们首次发现ANXA 1和自噬相关蛋白SQSTM 1在鼻咽癌(NPC)中的表达之间存在临床正相关性,并且ANXA 1通过自噬调节SQSTM 1的表达,并进一步证明ANXA 1抑制NPC细胞中BECN 1和ATG 5依赖的自噬。利用磷酸激酶抗体芯片鉴定ANXA 1调控鼻咽癌细胞自噬的信号通路,我们发现ANXA 1抑制的自噬与PI 3 K/AKT信号通路的激活有关。我们还发现,ANXA 1的表达显着增加的NPC转移相对于NPC没有转移,并与淋巴结和远处转移呈正相关; ANXA 1在NPC细胞的高表达促进肿瘤细胞的体外迁移和侵袭,并在体内转移。最后,我们发现抑制自噬可以恢复ANXA 1敲除的NPC细胞中具有自噬激活的肿瘤细胞迁移和侵袭、上皮-间质转化(EMT)样改变和体内转移的能力; ANXA 1抑制的自噬可能通过抑制自噬介导的Snail降解而诱导EMT样改变。我们的数据表明ANXA 1抑制的自噬通过激活PI 3 K/AKT信号通路促进NPC细胞的迁移、侵袭和转移,强调自噬的激活可能抑制ANXA 1高表达的NPC的转移。
Annexin A1 (ANXA1) is dysregulated in the various tumors. However, the role and mechanism of ANXA1 in the cancers are poorly understood. In this study, we first showed a clinically positive correlation between ANXA1 and autophagy-associated protein SQSTM1 expression in nasopharyngeal carcinoma (NPC) and ANXA1-regulating SQSTM1 expression through autophagy, and further demonstrated that ANXA1 inhibited BECN1 and ATG5-dependent autophagy in the NPC cells. Using phospho-kinase antibody array to identify signaling through which ANXA1 regulated NPC cell autophagy, we found that ANXA1-suppressed autophagy was associated with PI3K/AKT signaling activation. We also showed that ANXA1 expression was significantly increased in the NPCs with metastasis relative to NPCs without metastasis and positively correlated with lymphonode and distant metastasis; high ANXA1 expression in the NPC cells promoted in vitro tumor cell migration and invasion and in vivo metastasis. Lastly, we showed that inhibition of autophagy restored the ability of tumor cell migration and invasion, epithelial–mesenchymal transition (EMT)-like alterations and in vivo metastasis in the ANXA1 knockdown NPC cells with autophagy activation; ANXA1-suppresed autophagy induced EMT-like alterations possibly by inhibiting autophagy-mediated degradation of Snail. Our data suggest that ANXA1-suppressed autophagy promotes NPC cell migration, invasion and metastasis by activating PI3K/AKT signaling pathway, highlighting that the activation of autophagy may inhibit metastasis of NPC with high ANXA1 expression.
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