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(a) Evidence of a significant decrease in SOD1 expression in HCN-2 culture medium after SARS-CoV-2 infection, suggesting impairment of ROS reduction. (b) Densitometric analysis of SOD1, * p < 0.05. (c) Evidence of significant increase in iNOS expression in HCN-2 culture medium after SARS-CoV-2 infection, as an indicator of reactive species production. (d) Densitometric analysis of iNOS, ** p < 0.01.
