SARS-CoV-2 couples evasion of inflammatory response to activated nucleotide synthesis.

SARS-CoV-2 couples evasion of inflammatory response to activated nucleotide synthesis.
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DOI:
10.1073/pnas.2122897119
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发表时间:
2022-06-28
影响因子:
11.1
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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严重急性呼吸综合征冠状病毒 2 (SARS-CoV-2) 引起了全球 COVID-19 大流行。尽管持续的疫苗接种大大减少了 SARS-CoV-2 感染,但在中和抗体的压力下不断出现突变病毒,需要新的抗病毒策略。在此,我们报告 SARS-CoV-2 将逃避炎症反应与激活的核苷酸合成结合起来。抑制关键代谢酶不仅会耗尽核苷酸库,还能恢复宿主的炎症防御能力,从而有效阻止 SARS-CoV-2 的复制。针对细胞酶提供了一种对抗快速进化的 SARS-CoV-2 变体的途径。严重急性呼吸综合征冠状病毒 2 (SARS-CoV-2) 在宿主免疫的压力下迅速进化,尽管接种了有效的疫苗,但仍出现一波又一波的新变种,这凸显了补充抗病毒药物的必要性。我们报告说,靶向嘧啶合成酶可以恢复炎症反应并消耗核苷酸库,从而阻止 SARS-CoV-2 感染。 SARS-CoV-2 利用 Nsp9 激活氨基甲酰磷酸合成酶、天冬氨酸转氨基甲酰酶和二氢乳清酶 (CAD),催化嘧啶从头合成的限速步骤。激活的 CAD 不仅可以促进核苷酸从头合成,还可以使 RelA 脱酰胺。虽然 RelA 脱酰胺会关闭 NF-κB 激活和随后的炎症反应,但它会上调关键的糖酵解酶以促进有氧糖酵解,从而为从头合成核苷酸提供代谢物。一种新合成的 CAD 小分子抑制剂可恢复抗病毒炎症反应并耗尽嘧啶池,从而有效阻止 SARS-CoV-2 复制。因此,针对一种重要的细胞代谢酶提供了一种抗病毒策略,该策略更难以抵抗 SARS-CoV-2 的基因变化。
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused the global COVID-19 pandemic. Although ongoing vaccination drastically reduces SARS-CoV-2 infection, mutant viruses are emerging under the pressure of neutralizing antibodies, calling for new antiviral strategies. Here, we report that SARS-CoV-2 couples evasion of inflammatory response to activated nucleotide synthesis. Inhibition of a key metabolic enzyme not only depletes the nucleotide pool but also restores host inflammatory defense, thereby effectively impeding SARS-CoV-2 replication. Targeting cellular enzymes offers an avenue to combat rapidly evolving SARS-CoV-2 variants. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) evolves rapidly under the pressure of host immunity, as evidenced by waves of emerging variants despite effective vaccinations, highlighting the need for complementing antivirals. We report that targeting a pyrimidine synthesis enzyme restores inflammatory response and depletes the nucleotide pool to impede SARS-CoV-2 infection. SARS-CoV-2 deploys Nsp9 to activate carbamoyl-phosphate synthetase, aspartate transcarbamoylase, and dihydroorotase (CAD) that catalyzes the rate-limiting steps of the de novo pyrimidine synthesis. Activated CAD not only fuels de novo nucleotide synthesis but also deamidates RelA. While RelA deamidation shuts down NF-κB activation and subsequent inflammatory response, it up-regulates key glycolytic enzymes to promote aerobic glycolysis that provides metabolites for de novo nucleotide synthesis. A newly synthesized small-molecule inhibitor of CAD restores antiviral inflammatory response and depletes the pyrimidine pool, thus effectively impeding SARS-CoV-2 replication. Targeting an essential cellular metabolic enzyme thus offers an antiviral strategy that would be more refractory to SARS-CoV-2 genetic changes.
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影响因子: 24.1
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发表时间: 2018-03-30
期刊: Viruses
影响因子: --
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发表时间: 2020-09-01
期刊: CELL METABOLISM
影响因子: 29
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发表时间: 2015-11-19
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影响因子: 64.8
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Rabinovich S;Adler L;Yizhak K;Sarver A;Silberman A;Agron S;Stettner N;Sun Q;Brandis A;Helbling D;Korman S;Itzkovitz S;Dimmock D;Ulitsky I;Nagamani SC;Ruppin E;Erez A
通讯作者: Erez A