PBK phosphorylates MSL1 to elicit epigenetic modulation of CD276 in nasopharyngeal carcinoma.

PBK phosphorylates MSL1 to elicit epigenetic modulation of CD276 in nasopharyngeal carcinoma.
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PBK 磷酸化 MSL1 以引发鼻咽癌中 CD276 的表观遗传调节

DOI:
10.1038/s41389-020-00293-9
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发表时间:
2021-01-05
期刊:
影响因子:
6.2
通讯作者:
Chen DP
Chen DP
中科院分区:
医学1区
文献类型:
--
作者:
Wang MY;Qi B;Wang F;Lin ZR;Li MY;Yin WJ;Zhu YY;He L;Yu Y;Yang F;Liu JQ;Chen DP

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CD 276(也称为B7-H3,一种免疫检查点分子)在许多癌症中异常过表达。然而,上调机制,特别是致癌信号是否有作用,尚不清楚。在这里,我们证明,原癌激酶PBK,其表达与免疫浸润在鼻咽癌(NPC),刺激CD 276的表达表观遗传。在机制上,PI 3 K磷酸化MSL 1并增强MSL 1与MSL 2、MSL 3和KAT 8(MSL复合物的组分)之间的相互作用。因此,PBK促进MSL复合物在CD 276启动子上的富集,导致组蛋白H4 K16乙酰化增加和CD 276转录的激活。此外,我们发现,CD 276是高度上调,并与免疫浸润水平在NPC。总之,我们的研究结果描述了一种新的PBK/MSL 1/CD 276信号传导轴,它可能在NPC的免疫逃避中起重要作用,并可能成为癌症免疫治疗的靶点。
CD276 (also known as B7–H3, an immune checkpoint molecule) is aberrantly overexpressed in many cancers. However, the upregulation mechanism and in particular, whether oncogenic signaling has a role, is unclear. Here we demonstrate that a pro-oncogenic kinase PBK, the expression of which is associated with immune infiltration in nasopharyngeal carcinoma (NPC), stimulates the expression of CD276 epigenetically. Mechanistically, PBK phosphorylates MSL1 and enhances the interaction between MSL1 and MSL2, MSL3, and KAT8, the components of the MSL complex. As a consequence, PBK promotes the enrichment of MSL complex on CD276 promoter, leading to the increased histone H4 K16 acetylation and the activation of CD276 transcription. In addition, we show that CD276 is highly upregulated and associated with immune infiltrating levels in NPC. Collectively, our findings describe a novel PBK/MSL1/CD276 signaling axis, which may play an important role in immune evasion of NPC and may be targeted for cancer immunotherapy.
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