GSE185866
PAIP1 promote the progress of liver cancer via regulating expression of immune and inflammatory response associated genes
Poly(A) binding protein interacting protein 1 (PAIP1) is a translation regulator and also regulate the decay of mRNA. PAIP1 has also been reported to be a marker of increased invasive potential of liver cancer. However, the underlying molecular mechanism of PAIP1 in liver cancer is still unclear. Here, the gene expression profile of HepG2 cells transfected with PAIP1 shRNA (shPAIP1) was compared with cells transfected with empty vector (shCtrl). The results showed that shPAIP1 extensively affects the transcriptional level of 893 genes in HepG2 cells. In particular, GO analysis showed that a large number of up-regulated genes were annotated with terms including cell cycle and WNT receptor signaling pathway. The down-regulated genes were enriched in some pathways including immune response and inflammatory response. qPCR confirmed that PAIP1 knockdown significantly negatively or positively affected the expression of selected DEGs including interleukin-10 signaling pathway genes in HepG2 cells. Expression analysis of TCGA revealed that PAIP1 had positive correlations with IL1R2 and PTAFR in liver tumor tissue, respectively. Our results demonstrated that PAIP1 was not only a translation regulator, but also a transcription regulator in liver cancer. Thus, our study provides important cues for further study on the regulatory mechanism of PAIP1 in liver cancer Overall design: Transcrptional profile of  HepG2 cells with/without PAIP1 Knockdown were generated