Amino acid sensor GCN2 promotes SARS-CoV-2 receptor ACE2 expression in response to amino acid deprivation.

Amino acid sensor GCN2 promotes SARS-CoV-2 receptor ACE2 expression in response to amino acid deprivation.
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氨基酸传感器 GCN2 促进 SARS-CoV-2 受体 ACE2 表达以响应氨基酸剥夺

DOI:
10.1038/s42003-022-03609-0
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发表时间:
2022-07-01
影响因子:
5.9
通讯作者:
--
中科院分区:
生物学2区
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血管紧张素转换酶2(ACE 2)是严重急性呼吸综合征冠状病毒2型(SARS-CoV-2)的主要受体。在这里,我们研究了在氨基酸剥夺条件下肠上皮细胞中ACE 2的表达调控。在这项研究中,我们发现ACE 2表达上调后,所有或单一的必需氨基酸剥夺人结肠上皮细胞CCD 841。此外,我们发现,敲低一般控制非去阻遏蛋白2(GCN 2)降低肠ACE 2 mRNA和蛋白水平在体外和体内。GCN 2抑制剂GCN 2 iB和GCN 2-IN-1可下调CCD 841细胞中ACE 2蛋白的表达。此外,我们发现,增加ACE 2表达响应亮氨酸剥夺是GCN 2依赖性的。通过RNA测序分析,我们确定了两个转录因子,MAFB和MAFF,积极调节ACD 841细胞在亮氨酸剥夺表达。这些发现表明,氨基酸缺乏增加ACE 2表达,从而可能加重肠道SARS-CoV-2感染。
Angiotensin-converting enzyme 2 (ACE2) has been identified as a primary receptor for severe acute respiratory syndrome coronaviruses 2 (SARS-CoV-2). Here, we investigated the expression regulation of ACE2 in enterocytes under amino acid deprivation conditions. In this study, we found that ACE2 expression was upregulated upon all or single essential amino acid deprivation in human colonic epithelial CCD841 cells. Furthermore, we found that knockdown of general control nonderepressible 2 (GCN2) reduced intestinal ACE2 mRNA and protein levels in vitro and in vivo. Consistently, we revealed two GCN2 inhibitors, GCN2iB and GCN2-IN-1, downregulated ACE2 protein expression in CCD841 cells. Moreover, we found that increased ACE2 expression in response to leucine deprivation was GCN2 dependent. Through RNA-sequencing analysis, we identified two transcription factors, MAFB and MAFF, positively regulatedACE2expression under leucine deprivation in CCD841 cells. These findings demonstrate that amino acid deficiency increases ACE2 expression and thereby likely aggravates intestinal SARS-CoV-2 infection.
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发表时间: 2020-03-26
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