TFAP2A potentiates lung adenocarcinoma metastasis by a novel miR-16 family/TFAP2A/PSG9/TGF-β signaling pathway.

TFAP2A potentiates lung adenocarcinoma metastasis by a novel miR-16 family/TFAP2A/PSG9/TGF-β signaling pathway.
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TFAP2A 通过新型 miR-16 家族/TFAP2A/PSG9/TGF-β 信号通路增强肺腺癌转移

DOI:
10.1038/s41419-021-03606-x
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发表时间:
2021-04-06
影响因子:
9
通讯作者:
Han Y
Han Y
中科院分区:
生物学1区
文献类型:
--
作者:
Xiong Y;Feng Y;Zhao J;Lei J;Qiao T;Zhou Y;Lu Q;Jiang T;Jia L;Han Y

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转录因子AP-2α(TFAP 2A)是胚胎发育过程中的重要调控因子,近年来其在肿瘤发生中的作用受到广泛关注。然而,其在肺腺癌(LUAD)中的作用尚未完全阐明。本研究旨在探讨TFAP 2A在LUAD中的表达谱、临床意义、生物学功能及分子基础。我们证明LUAD具有普遍的TFAP 2A高表达,在多个独立数据集中表明普遍较差的预后。进一步研究发现TFAP 2A对LUAD的增殖并不是必需的,外源性过表达甚至会引起抑制。然而,我们发现TFAP 2A可能通过在体外和体内触发上皮-间质转化(EMT)而有效地促进LUAD转移。此外,我们证明TFAP 2A可以反式激活妊娠特异性糖蛋白9(PSG 9),以增强转化生长因子β(TGF-β)触发LUAD中的EMT。同时,我们发现miR-16家族转录后沉默抑制TFAP 2A在LUAD中部分促进TFAP 2A上调。在临床标本中,我们也验证了miR-16家族/TFAP 2A/PSG 9轴的癌症调节作用,特别是对于LUAD的淋巴结转移。总之,我们证明了TFAP 2A可以枢转地促进LUAD进展,可能是通过新的促转移信号通路(miR-16家族/TFAP 2A/PSG 9/ TGF-β)。
Transcription factor AP-2α (TFAP2A) was previously regarded as a critical regulator during embryonic development, and its mediation in carcinogenesis has received intensive attention recently. However, its role in lung adenocarcinoma (LUAD) has not been fully elucidated. Here, we tried to investigate TFAP2A expression profiling, clinical significance, biological function and molecular underpinnings in LUAD. We proved LUAD possessed universal TFAP2A high expression, indicating a pervasively poorer prognosis in multiple independent datasets. Then we found TFAP2A was not indispensable for LUAD proliferation, and exogenous overexpression even caused repression. However, we found TFAP2A could potently promote LUAD metastasis possibly by triggering epithelial–mesenchymal transition (EMT) in vitro and in vivo. Furthermore, we demonstrated TFAP2A could transactivate Pregnancy-specific glycoprotein 9 (PSG9) to enhance transforming growth factor β (TGF-β)-triggering EMT in LUAD. Meanwhile, we discovered suppressed post-transcriptional silencing of miR-16 family upon TFAP2A partly contributed to TFAP2A upregulation in LUAD. In clinical specimens, we also validated cancer-regulating effect of miR-16 family/TFAP2A/PSG9 axis, especially for lymph node metastasis of LUAD. In conclusion, we demonstrated that TFAP2A could pivotally facilitate LUAD progression, possibly through a novel pro-metastasis signaling pathway (miR-16 family/TFAP2A/PSG9/ TGF-β).
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