BPIFB1 (LPLUNC1) inhibits radioresistance in nasopharyngeal carcinoma by inhibiting VTN expression.

BPIFB1 (LPLUNC1) inhibits radioresistance in nasopharyngeal carcinoma by inhibiting VTN expression.
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BPIFB1 (LPLUNC1) 通过抑制 VTN 表达来抑制鼻咽癌的放射抗性

DOI:
10.1038/s41419-018-0409-0
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发表时间:
2018-04-01
影响因子:
9
通讯作者:
Zeng Z
Zeng Z
中科院分区:
生物学1区
文献类型:
--
作者:
Wei F;Tang L;He Y;Wu Y;Shi L;Xiong F;Gong Z;Guo C;Li X;Liao Q;Zhang W;Ni Q;Luo J;Li X;Li Y;Peng C;Chen X;Li G;Xiong W;Zeng Z

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具有杀菌/通透性增加倍数的 B 家族成员 1(BPIFB1,以前称为 LPLUNC1)在鼻咽部高表达,在鼻咽癌 (NPC) 中显着下调。低表达还与 NPC 患者预后不良相关。放射治疗是鼻咽癌的常规治疗方法;然而,放射抗性是治疗失败的主要原因。因此,我们的目的是研究BPIFB1在NPC放射反应中的作用。集落形成和细胞存活结果表明BPIFB1使NPC细胞对电离辐射敏感。 VTN 是一种先前鉴定的 BPIFB1 结合蛋白,可诱导细胞增殖和存活、G2/M 期停滞、DNA 修复、ATM-Chk2 和 ATR-Chk1 通路的激活以及暴露于辐射后的抗凋亡作用,从而促进鼻咽癌细胞的放射抗性。然而,BPIFB1 抑制了这种 VTN 介导的放射抗性,最终提高了 NPC 的放射敏感性。总之,本研究首次证明了 BPIFB1 和 VTN 在 NPC 放射反应中的功能。我们的研究结果表明,促进 BPIFB1 表达和靶向 VTN 可能代表鼻咽癌的新治疗策略。
Bactericidal/permeability-increasing-fold-containing family B member 1 (BPIFB1, previously named LPLUNC1) is highly expressed in the nasopharynx and significantly downregulated in nasopharyngeal carcinoma (NPC). Low expression is also associated with poor prognosis in patients with NPC. Radiotherapy is a routine treatment for NPC; however, radioresistance is a major cause of treatment failure. Thus, we aimed to investigate the role of BPIFB1 in the radioresponse of NPC. Colony formation and cell survival results showed that BPIFB1 sensitized NPC cells to ionizing radiation. VTN, a previously identified BPIFB1-binding protein, was shown to induce cell proliferation and survival, G2/M phase arrest, DNA repair, activation of the ATM-Chk2 and ATR-Chk1 pathways, and anti-apoptotic effects after exposure to radiation, facilitating NPC cell radioresistance. However, BPIFB1 inhibited this VTN-mediated radioresistance, ultimately improving NPC radiosensitivity. In conclusion, this study is the first to demonstrate the functions of BPIFB1 and VTN in the NPC radioresponse. Our findings indicated that promoting BPIFB1 expression and targeting VTN might represent new therapeutic strategies for NPC.
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