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HDAC5 regulates arachidonic acid metabolism via cPLA2

ABSTRACT: We performed HDAC5 knockdown in pancreatic cancer cells along with RNA sequencing. The result helped us to verify that HDAC5 regulates GATA1 dependent cPLA2 expression and arachidonic acid metabolism.

ORGANISM(S): Homo sapiens

PROVIDER: GSE185837 | GEO | 2022/10/11

REPOSITORIES: GEO

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HDAC5 loss in pancreatic cancer induces enhanced arachidonic acid metabolism via overactivated GATA1-cPLA2 axis

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Project description:HDAC5 belongs to Class IIa histone deacetylases and forms corepressor complex with HDAC3 to suppess gene expression. To identify the target genes of HDAC5, we performed ChIP-seq analysis in FLAG-tagged HDAC5 PDAC escaper cells. HDAC5 binding chromatins were pulled down by HDAC5 antibody and FLAG antibody as replicates.

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RNAseq data comparing HDAC5 eccaper PDAC cells with HDAC5 knockdown and scramble control

Project description:HDAC5 drives PDAC cells to bypass KRAS* dependency. To dissect the molecular mechanisms that regulated by overexpressed HDAC5 in escaper cells, we conducted RNA-seq analysis of HDAC5 escaper PDAC cells knocking down of HDAC5 or scramble shRNA control.

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ENO1 promotes liver carcinogenesis through YAP1-dependent arachidonic acid metabolism

Project description:Enolase 1 (ENO1) is a glycolytic enzyme that plays essential roles in various pathological activities including cancer development. However, the mechanisms underlying ENO1-contributed tumorigenesis are not well explained. Here, we uncover that ENO1, as an RNA-binding protein, binds to the cytosine-uracil-guanine-rich elements of YAP1 messenger RNA to promote its translation. ENO1 and YAP1 positively regulate alternative arachidonic acid (AA) metabolism by inverse regulation of PLCB1 and HPGD (15-hydroxyprostaglandin dehydrogenase). The YAP1/PLCB1/HPGD axis-mediated activation of AA metabolism and subsequent accumulation of prostaglandin E2 (PGE2) are responsible for ENO1-mediated cancer progression, which can be retarded by aspirin. Finally, aberrant activation of ENO1/YAP1/PLCB1 and decreased HPGD expression in clinical hepatocellular carcinoma samples indicate a potential correlation between ENO1-regulated AA metabolism and cancer development. These findings underline a new function of ENO1 in regulating AA metabolism and tumorigenesis, suggesting a therapeutic potential for aspirin in patients with liver cancer with aberrant expression of ENO1 or YAP1.

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Project description:Although Candida species, more specifically C. albicans, are the most common pathogenic yeasts, little is known about the mechanism involved in eicosanoid production, a virulence factor in these organisms. This is an important area of research which may aid in the understanding of the complex interactions between host and pathogen and may possibly lead to the identification of novel antifungals or drug targets. In this study, genomic hybridization studies using C. albicans DNA microarrays were used to evaluate the regulation of C. albicans biofilm genes during incubation in the presence of arachidonic acid, the major precursor for prostaglandin E2 production. The results obtained indicated that the genes differentially expressed had diverse functions not normally required for cell growth. Two-condition experiment, Control biofilms vs. Arachidonic acid treated biofilms at different time intervals. Biological replicates: 3 Control, 3 Arachidonic acid treated, independently grown and harvested. Technical replicate: dye swap included. Triplicate per array.

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