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The mRNA-lncRNA-circRNA network profiling of Turner syndrome patient-derived induced pluripotent stem cells and their derived cardiomyocytes

ABSTRACT: The mRNA-lncRNA-circRNA network profiling of Turner syndrome patient-derived induced pluripotent stem cells and their derived cardiomyocytes

PROVIDER: PRJNA1000924 | ENA |

REPOSITORIES: ENA

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The mRNA-lncRNA-circRNA network profiling of Turner syndrome patient-derived induced pluripotent stem cells and their derived cardiomyocytes

Project description:Heart deformity is the leading cause of mortality in Turner syndrome (TS) patients. To investigate the dysregulated ceRNA network in cardiomyocytes (CMs) of TS patients, we employed a ceRNA microarray to profile the mRNA-lncRNA-circRNA network in induced pluripotent stem cells (iPSCs) and their derived CMs from healthy donors (WT) and TS patients.

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Immunopeptidomics-based identification of naturally presented non-canonical circRNA-derived peptides

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Project description:The interaction between germ cells and somatic cells in the ovaries plays a crucial role in establishing the follicle reserve in mammals. Turner syndrome (TS) predominantly occurs in females who have either a partial or complete loss of one of their X chromosomes. Our understanding of the role granulosa cells (GCs) play in TS disease progression and pathogenesis remains limited. Here, we elevated GC differentiation efficiency up to the level of 80% differentiated cells from iPSCs. In our attempt to replicate the differentiation process of embryonic granulosa cells, we observed that specific genes—GATA4, FOXL2, AMHR2, CYP19A1, and FSH—were downregulated in Turner syndrome-derived granulosa cells (TS-GCs). Additionally, dysregulation of the cell cycle was observed in TS-GCs. To reveal the endogenous defects in the TS-GCs, we conducted a comparison of the global transcriptome patterns between differentiated granulosa cells derived from iPSCs in both healthy and Turner syndrome groups. The apelin/APJ pathway displayed a differential between the healthy and TS groups. Supplementation of apelin ligands and activation of apelin/APJ downstream signals via Akt/PKB restored the cell cycle progression and marker gene expression. We hypothesize that during early embryonic development failures in apelin/APJ signaling in GCs in Turner syndrome patients leads to abnormalities in ovarian development and consequently to early loss of oocytes and infertility.

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Project description:Background: Turner syndrome, a common sex chromosome aneuploidy, has characteristics and malformations associated with the phenotype. Fetal amniotic fluid is a complex biological material that could contribute to the understanding Turner syndrome pathogenesis. Global gene expression analysis of Turner syndrome fetal amniotic fluid supernatant was utilized to identify organ systems and specific genes that may play a role in the pathophysiologic changes that are seen in individuals with Turner syndrome. Methods: Global gene expression analysis was performed utilizing cell-free RNA from five midtrimester fetuses with Turner syndrome matched with five euploid female fetuses. Total RNA was extracted, amplified, hybridized onto GeneChip® Human Genome U133 Plus 2.0 arrays. Network and pathway analysis of differentially expressed genes were completed. Chromosomal distribution of gene expression differences, differential expression by pathway and organ system (a “Turner syndrome core transcriptome”), and candidate genes that could play a pathological role were identified. Results: There were 470 differentially expressed genes identified in the Turner syndrome transcriptome. The differentially expressed genes were distributed randomly across different chromosomes. Among genes on the X chromosome, XIST was down-regulated, and SHOX not differentially expressed. The most highly represented organ systems were hematologic/immune and neurologic. Increased representation of differentially expressed genes in the hematologic/immune system distinguishes the Turner syndrome transcriptome from the euploid, trisomy 18 and trisomy 21 transcriptomes previously studied in our laboratory. Manual curation of the differentially expressed gene list identified genes including NFATC3, IGFBP5, and LDLR that warrant further study.

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