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. 2021 Jun 15;12:3644. doi: 10.1038/s41467-021-23902-6

Fig. 3. Regulation of iPLA2β during p53-mediated stress responses.

Fig. 3

a qPCR analysis of mRNA levels of iPLA2β in the MCF-7, U2OS, A375, and H1299 cells treated with 0.2 μg/mL doxorubicin or 10 μM Nutlin for 24 h. b qPCR analysis of mRNA levels of iPLA2β in the U2OS CRISPR control versus p53−/− cells treated with 10 μM Nutlin for 24 h. c Schematic representation of the promoter region in the human iPLA2β gene. The p53-binding sites upstream of the first exon are indicated as responsive elements (RE). TSS, transcription start site. d ChIP-qPCR was performed in H1299 cells transfected with empty vector or p53. p values were calculated using two-sided unpaired Student’s t-test. Detailed statistical tests are described in the ‘Methods’. p = 0.564 for RE1; p = 0.0000000196 for RE2; p = 0.000118 for RE3; and p = 0.00316 for TIGAR. e H1299 cells were transfected with empty vector, wild-type p53 or mutants (R175H, R273H, and R248W), and iPLA2β mRNA levels were analyzed by qRT-PCR. a, b, d, e Error bars are mean ± s.d., n = 3 biologically independent experiments. Source data are provided as a Source Data file.