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. 2020 Dec 21:bbaa327. doi: 10.1093/bib/bbaa327

Figure 4.

Figure 4

qPCR validation for the regulation of ACE2 expression by cytokines EGF, IFN-γ and TNF-α in human lung cells. The human bronchial epithelial cells (BEAS-2B) were treated with each of the above cytokines for 0, 12, 24, 36 and 48 h. (A) Time-course expression of ACE2 after stimulation with different doses of EGF (50, 100, 200 ng/ml). (B) Time-course expression of ACE2 after stimulation with different doses of IFN-γ (25, 50, 100 ng/ml). (C) Time-course expression of ACE2 after stimulation with different doses of TNF-α (50, 100, 200 ng/ml).