TP53 and neoplasm: In support of this hypothesis, stimulation with high‐triglyceride serum or OA decreased the level of p53 protein in tumor cells (Figure 3C,D), whereas treatment with triacsin C increased the level of p53 protein in tumor cells, although the level of p53 gene expression remained unchanged (Figure 3C; Figure S4A, Supporting Information), suggesting posttranscriptional modification of p53.