id author title date pages extension mime words sentences flesch summary cache txt cord-270550-if748w2n Bailey, Adam L. SARS-CoV-2 Infects Human Engineered Heart Tissues and Models COVID-19 Myocarditis 2020-11-05 .txt text/plain 5808 440 49 To ascertain whether human pluripotent stem cell-derived cardiomyocytes (hPSC-derived 150 CMs) can serve as an appropriate model to study cardiac SARS-CoV-2 infection, we measured 151 ACE2 mRNA expression in hPSC-derived CMs. Quantitative RT-PCR revealed that hPSC-152 derived CMs abundantly expressed ACE2 mRNA. We identified numerous host genes that were differentially 226 regulated upon SARS-CoV-2 infection in each of the examined cell types and two-dimensional 227 tissues (Fig. 3c) . 236 GO pathway analysis revealed that infected hPSC-derived CMs and two-dimensional co-237 culture tissues showed upregulation of genes associated with immune cell activation, stress-238 induced transcription, and responses to pathogens including viruses. Consistent with the 343 possibility that disrupted sarcomere gene expression might contribute to reduced EHT 344 contractility, immunostaining of hPSC-derived CMs infected with SARS-CoV-2 revealed evidence 345 of sarcomere loss 3 days following infection (Fig. 6c) , a time point that preceded cell death. ./cache/cord-270550-if748w2n.txt ./txt/cord-270550-if748w2n.txt