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Wang, Cheng; Zhang, Mingzi; Garcia, Gustavo; Tian, E.; Cui, Qi; Chen, Xianwei; Sun, Guihua; Wang, Jinhui; Arumugaswami, Vaithilingaraja; Shi, Yanhong
Cell stem cell, 02/2021, Volume: 28, Issue: 2Journal Article
ApoE4, a strong genetic risk factor for Alzheimer disease, has been associated with increased risk for severe COVID-19. However, it is unclear whether ApoE4 alters COVID-19 susceptibility or severity, and the role of direct viral infection in brain cells remains obscure. We tested the neurotropism of SARS-CoV2 in human-induced pluripotent stem cell (hiPSC) models and observed low-grade infection of neurons and astrocytes that is boosted in neuron-astrocyte co-cultures and organoids. We then generated isogenic ApoE3/3 and ApoE4/4 hiPSCs and found an increased rate of SARS-CoV-2 infection in ApoE4/4 neurons and astrocytes. ApoE4 astrocytes exhibited enlarged size and elevated nuclear fragmentation upon SARS-CoV-2 infection. Finally, we show that remdesivir treatment inhibits SARS-CoV2 infection of hiPSC neurons and astrocytes. These findings suggest that ApoE4 may play a causal role in COVID-19 severity. Understanding how risk factors impact COVID-19 susceptibility and severity will help us understand the potential long-term effects in different patient populations. Display omitted •SARS-CoV-2 infects hiPSC-derived neurons, astrocytes, and brain organoids•ApoE4 neurons and astrocytes are more susceptible to SARS-CoV-2 infection•APOE4 astrocytes exhibit a more severe response to SARS-CoV-2 infection•RDV inhibits SARS-CoV-2 infection in neurons and astrocytes Shi and colleagues used hiPSC-derived neurons, astrocytes, and brain organoids to model SARS-CoV-2 neurotropism. They found that ApoE4/4 genotype led to an increased rate of SARS-CoV-2 infection in both neurons and astrocytes, and ApoE4 astrocytes exhibited a more severe response. Moreover, remdesivir could inhibit SARS-CoV-2 infection in neurons and astrocytes.
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