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Next Generation Sequencing Quantitative Analysis of Wild Type, CDK8-/-, CDK19-/-, and CDK8-/-CDK19-/- mouse instestinal organoids transcriptomes

ABSTRACT: Purpose: The goals of this study were to compare gene expression profiles of mouse intestinal epithelium organoids with intact or disrupted CDK8 and CDK19 genes. Methods: mRNA profiles of all organoid genotypes, in biological triplicates, were generated by deep sequencing using the BGISEQ SE50 50 million single-end, 50bp reads per sample. The sequence reads that passed quality filters were aligned to the mouse genome, quantified, and differential gene expression (DGE) analysis was performed using DEseq2. Results: Using an optimized data analysis workflow, we mapped about 50 million sequence reads per sample to the mouse genome (GRCm38.p6) and identified differentially expressed genes. This mild changes in overall gene expression, preferentially enriched in tissue specif genes. The transcription profile showed an overlap between those present in a CFTR KO context. Conclusions: CDK8/19 knockout causes tissue specif expression alteration. Intestinal organoids presented a CFTR-like phenotype after removal of both genes

ORGANISM(S): Mus musculus

PROVIDER: GSE186377 | GEO | 2022/10/23

REPOSITORIES: GEO

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Project description:There is an unmet need for chemical tools to explore the role of the Mediator complex in human pathologies ranging from cancer to cardiovascular disease. Here we determine that CCT251545 a WNT-pathway inhibitor discovered by cell-based screening is a potent and selective chemical probe for the Mediator complex-associated protein kinases CDK8 and CDK19. CCT251545 is an ATP competitive inhibitor with >100-fold selectivity over 291 other kinases. X-ray crystallography demonstrates Type 1 binding involving insertion of the CDK8 C-terminus into the ligand binding site. In contrast to Type II inhibitors of CDK8/19 CCT251545 displays potent cell-based activity. We show that CCT251545 and close analogues not only alter WNT-pathway regulated gene expression but also other CDK8/19 targets including STAT1-regulated gene expression. Consistent with this we find that phospho-STAT1SER727 is a biomarker of CDK8 kinase activity in vitro and in vivo. Finally we demonstrate in vivo activity of CCT251545 in WNT-dependent tumours. Compound 1,2, 6 and 9 are close analogues of a 3,4,5-trisubstituted pyridine series identified from a high-throughput cell-based reporter assay of WNT signalling. They were shown to be potent and selective inhibitors of the Mediator complex-associated protein kinases CDK8 and CDK19. They are ATP competitive inhibitors with >100-fold selectivity over 291 other kinases. X-ray crystallography demonstrates Type 1 binding involving insertion of the CDK8 C-terminus into the ligand-binding site. A 3D culture model of murine intestinal-derived organoids expressing a transgenic doxycycline-inducible mutant beta-catenin expression following removal of doxycycline results in reduced WNT signalling and was compared to treatment for 24 hours with coumpound 2, 6 and 9. Compound 2 (n=3), compound 6 (n=4), compound 9 (n=3), doxycycline removal (n=4), doxycycline treatment (n=7). Samples were hybridized agianst mouse reference. Compounds 2, 6 and 9 are close analogues of a 3,4,5-trisubstituted pyridine series identified from a high-throughput cell-based reporter assay of WNT signalling. They were shown to be potent and selective inhibitors of the Mediator complex-associated protein kinases CDK8 and CDK19. They are ATP competitive inhibitors with >100-fold selectivity over 291 other kinases. X-ray crystallography demonstrates Type 1 binding involving insertion of the CDK8 C-terminus into the ligand-binding site.

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Next Generation Sequencing Quantitative Analysis of Wild Type, CDK8-/-, CDK19-/-, and CDK8-/-CDK19-/- mouse instestinal organoids transcriptomes

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