A small molecule inhibitor of the UBE2F-CRL5 axis induces apoptosis and radiosensitization in lung cancer

Xu Tiantian; Ma Qisheng; Li YananYu QingPan PeichenZheng YawenLi ZhijianXiong XiufangHou TingjunYu BinLiu HongminSun Yi

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A small molecule inhibitor of the UBE2F-CRL5 axis induces apoptosis and radiosensitization in lung cancer

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Protein neddylation is catalyzed by a neddylation activating enzyme (NAE, E1), an E2 conjugating enzyme, and an E3 ligase. In various types of human cancers, the neddylation pathway is abnormally activated. Our previous study validated that the neddylation E2 UBE2F is a promising therapeutic target in lung cancer. Although the NAE inhibitor MLN4924/pevonedistat is currently under clinical investigation as an anti-cancer agent, there are no small molecules available that selectively target UBE2F. Here, we report, for the first time, the discovery, via structure-based virtual screen and chemical optimization, of such a small molecule, designated as HA-9104. HA-9104 binds to UBE2F, reduces its protein levels, and consequently inhibits cullin-5 neddylation. Blockage of cullin-5 neddylation inactivates cullin-RING ligase-5 (CRL5) activity, leading to accumulation of the CRL5 substrate, NOXA, to induce apoptosis. Moreover, HA-9104 appears to form the DNA adduct via its 7-azaindole group to induce DNA damage and G2/M arrest. Biologically, HA-9104 effectively suppresses the growth and survival of lung cancer cells and confers radiosensitization in both in vitro cell culture and in vivo xenograft tumor models. In summary, we discovered a small molecule, designated HA-9104, that targets the UBE2F-CRL5 axis with anti-cancer activity alone or in combination with radiation.

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《signal transduction and targeted therapy》 |2022年第1期|共15页
作者
Xu Tiantian; Ma Qisheng; Li YananYu QingPan PeichenZheng YawenLi ZhijianXiong XiufangHou TingjunYu BinLiu HongminSun Yi;
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Zhejiang Univ;

Zhejiang Univ;

Zhejiang UnivZhejiang UnivZhengzhou UnivZhejiang UnivShandong Univ;

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正文语种英语
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CULLIN-RING LIGASES; DIFFERENTIAL SCANNING FLUOROMETRY; NEDD8-ACTIVATING ENZYME; PROTEIN NEDDYLATION; ESSENTIAL KINASE; ATR; ACTIVATION; PATHWAYS; NEDD8; DNA;

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A small molecule inhibitor of the UBE2F-CRL5 axis induces apoptosis and radiosensitization in lung cancer

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