Systematic analysis of SARS-CoV-2 infection of an ACE2-negative human airway cell.

Systematic analysis of SARS-CoV-2 infection of an ACE2-negative human airway cell.
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DOI:
10.1016/j.celrep.2021.109364
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发表时间:
2021-07-13
期刊:
影响因子:
8.8
通讯作者:
Kutluay SB
Kutluay SB
中科院分区:
生物学1区
文献类型:
--
作者:
Puray-Chavez M;LaPak KM;Schrank TP;Elliott JL;Bhatt DP;Agajanian MJ;Jasuja R;Lawson DQ;Davis K;Rothlauf PW;Liu Z;Jo H;Lee N;Tenneti K;Eschbach JE;Shema Mugisha C;Cousins EM;Cloer EW;Vuong HR;VanBlargan LA;Bailey AL;Gilchuk P;Crowe JE Jr;Diamond MS;Hayes DN;Whelan SPJ;Horani A;Brody SL;Goldfarb D;Major MB;Kutluay SB

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严重急性呼吸综合征冠状病毒2型(SARS-CoV-2)尖峰(S)变异株控制着传播性、对疫苗接种的反应性和疾病严重程度。在对SARS-CoV-2感染新模型的筛选中,我们发现人H522肺腺癌细胞对SARS-CoV-2感染是自然允许的,尽管完全没有血管紧张素转换酶2(ACE2)的表达。值得注意的是,H522感染需要E484D S变体;表达野生型S的病毒不具传染性。与表达血管紧张素转换酶2的细胞相比,抗S的单抗在H522细胞中对SARS-CoV-2E484D S具有不同的中和作用。来自接种疫苗的个体的血清阻止了这种替代的进入机制,而恢复期的血清则不那么有效。尽管H522受体尚不清楚,但去除表面硫酸肝素可以阻止H522感染。时间分辨的转录和蛋白质组学分析揭示了细胞周期和抗病毒宿主细胞反应的变化,包括依赖MDA5的I型干扰素信号的激活。这些发现建立了E484D SARS-CoV-2变异体的另一种SARS-CoV-2宿主细胞受体,它可能影响SARS-CoV-2的趋向性,从而影响人类疾病的发病机制。SARS-CoV-2尖峰的变异增强了传播性和疾病严重性。Puray-Chavez等人。报道了一种自然支持E484变异SARS-CoV-2感染的人肺细胞系,该细胞系独立于ACE2的表达。这种替代的进入机制可能是复杂的新冠肺炎发病机制的基础,并影响未来的治疗设计。
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike (S) variants govern transmissibility, responsiveness to vaccination, and disease severity. In a screen for new models of SARS-CoV-2 infection, we identify human H522 lung adenocarcinoma cells as naturally permissive to SARS-CoV-2 infection despite complete absence of angiotensin-converting enzyme 2 (ACE2) expression. Remarkably, H522 infection requires the E484D S variant; viruses expressing wild-type S are not infectious. Anti-S monoclonal antibodies differentially neutralize SARS-CoV-2 E484D S in H522 cells as compared to ACE2-expressing cells. Sera from vaccinated individuals block this alternative entry mechanism, whereas convalescent sera are less effective. Although the H522 receptor remains unknown, depletion of surface heparan sulfates block H522 infection. Temporally resolved transcriptomic and proteomic profiling reveal alterations in cell cycle and the antiviral host cell response, including MDA5-dependent activation of type I interferon signaling. These findings establish an alternative SARS-CoV-2 host cell receptor for the E484D SARS-CoV-2 variant, which may impact tropism of SARS-CoV-2 and consequently human disease pathogenesis. Variants in the SARS-CoV-2 spike enhance transmissibility and disease severity. Puray-Chavez et al. report a human lung cell line that naturally supports E484 variant SARS-CoV-2 infection independently of ACE2 expression. This alternative entry mechanism may underlie the complex COVID-19 pathogenesis and impact future therapeutic design.
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