Dataset Information

PPIB-regulated alternative splicing of cell cycle genes contributes to the regulation of cell proliferation.

ABSTRACT:

Background

Peptidylprolyl cis-trans isomerase B (PPIB) plays an important role in the process of inflammation through binding RNA, but the molecular pathogenesis is not yet clearly understood. The objective of this study was to investigate and verify the PPIB-regulated gene expressions and alternative splicing in Hela cells.

Methods

We examined the PPIB-regulated transcriptomes in HeLa cells using RNA-seq data. Differentially expressed genes, alternative splicing analysis were carried out. Functional enrichment analysis was used to define the enrichment of each term.

Results

We found that PPIB knockdown successfully downregulated PPIB in Hela cells, which promoted cell proliferation (P < 0.001), but no significant effect on cell apoptosis. Ten alternative splicing genes regulated by PPIB were detected in Hela cells. The ten top Gene Ontology biological process analysis and functional pathways of the alternative splicing genes were screened and identified. The pathways where differentially expressed genes are most enriched were toll-like receptor 4 signaling pathways and other signaling pathways relating to inflammation and immune response. In addition, PPIB affects the alternative splicing of multiple genes, and the Gene Ontology-biological process analysis showed that genes significantly related to alternative splicing changes were mainly enriched in the cell cycle (P < 0.05).

Conclusion

PPIB regulates the alternative splicing of cell cycle-related genes to affect cell proliferation and regulate the occurrence and development of chronic inflammatory diseases such as Nasal polyps.

SUBMITTER: Zhang Y

PROVIDER: S-EPMC9556483 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature

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Publications

PPIB-regulated alternative splicing of cell cycle genes contributes to the regulation of cell proliferation.

Zhang Yuan Y Liu Lei L Zhou Minghui M Zhang Yujie Y Su Hongxia H Dong Dong D Wang Jia J

American journal of translational research 20220915 9

<h4>Background</h4>Peptidylprolyl cis-trans isomerase B (PPIB) plays an important role in the process of inflammation through binding RNA, but the molecular pathogenesis is not yet clearly understood. The objective of this study was to investigate and verify the PPIB-regulated gene expressions and alternative splicing in Hela cells.<h4>Methods</h4>We examined the PPIB-regulated transcriptomes in HeLa cells using RNA-seq data. Differentially expressed genes, alternative splicing analysis were car ...[more]

PMID: 36247241

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Project description:Alternative splicing generates protein diversity and allows for post-transcriptional gene regulation. Estimates suggest that 10% of the genes in Caenorhabditis elegans undergo alternative splicing. We constructed a splicing-sensitive microarray to detect alternative splicing for 352 cassette exons and tested for changes in alternative splicing of these genes during development. We found that the microarray data predicted that 62/352 (approximately 18%) of the alternative splicing events studied show a strong change in the relative levels of the spliced isoforms (>4-fold) during development. Confirmation of the microarray data by RT-PCR was obtained for 70% of randomly selected genes tested. Among the genes with the most developmentally regulated alternatively splicing was the hnRNP F/H splicing factor homolog, W02D3.11 - now named hrpf-1. For the cassette exon of hrpf-1, the inclusion isoform comprises 65% of hrpf-1 steady state messages in embryos but only 0.1% in the first larval stage. This dramatic change in the alternative splicing of an alternative splicing factor suggests a complex cascade of splicing regulation during development. We analyzed splicing in embryos from a strain with a mutation in the splicing factor sym-2, another hnRNP F/H homolog. We found that approximately half of the genes with large alternative splicing changes between the embryo and L1 stages are regulated by sym-2 in embryos. An analysis of the role of nonsense-mediated decay in regulating steady-state alternative mRNA isoforms was performed. We found that 8% of the 352 events studied have alternative isoforms whose relative steady-state levels in embryos change more than 4-fold in a nonsense-mediated decay mutant, including hrpf-1. Strikingly, 53% of these alternative splicing events that are affected by NMD in our experiment are not obvious substrates for NMD based on the presence of premature termination codons. This suggests that the targeting of splicing factors by NMD may have downstream effects on alternative splicing regulation.

Dataset Information

PPIB-regulated alternative splicing of cell cycle genes contributes to the regulation of cell proliferation.

Background

Methods

Results

Conclusion

Publications

PPIB-regulated alternative splicing of cell cycle genes contributes to the regulation of cell proliferation.

Similar Datasets

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