Figure 4.
ATF3 overexpression suppressed expression of pro-inflammatory cytokines IL-6 and IL-8 in HDFs. (A) The mRNA levels of cytokine, growth factor and CAF-related genes were measured by qRT-PCR in ATF3-OE HDFs and control NEO HDFs. (B) The mRNA levels of the same genes as in (A) were measured by qRT-PCR in two HDF pools with CRISPR/Cas9-mediated ATF3 deletion by independent small guide RNAs (ATF3-SG1 or ATF3-SG2) and compared with the mRNA levels in control HDFs transduced with empty vector (CON-V). (C,D) Protein concentrations of IL-6, IL-8 and TNFα measured by ELISA in CM derived from ATF3-OE or control NEO HDFs (C) and in CM from HDFs with CRISPR/Cas9-mediated deletion of ATF3 (ATF3-SG1 or ATF3-SG2) or control vector (CON-V) (D). Data are presented as the mean ± standard deviation, *p < 0.05, **p < 0.01.