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The effects of NAT10 on heart development

ABSTRACT: The effects of NAT10 on heart development

PROVIDER: PRJNA1144453 | ENA |

REPOSITORIES: ENA

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The effects of NAT10 on heart development

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Project description:During mammalian follicular development, the correct establishment of the epitranscriptome in oocytes is essential for precise gene repression and the acquisition of developmental competence. N4-acetylcytidine (ac4C) is a conserved posttranscriptional RNA modification catalyzed by the only known “writer”, N-acetyltransferase 10 (NAT10). NAT10-targeted transcripts in oocytes and their functions in supporting folliculogenesis are poorly understood. In this study, we showed that oocyte-specific knockout of Nat10 resulted in retardation of oocyte growth with defective follicular development, premature ovarian failure, and female sterility. We profiled the ac4C landscape in the ovarian transcriptome and identified many folliculogenesis-related oocyte genes with ac4C modifications. Loss of Nat10 in oocytes eliminated ac4C signals, resulting in the downregulation of numerous oocyte-derived transcripts with reduced stability. Moreover, Nat10-deletion in oocytes or mutations in these ac4C sites led to decreased levels of protein translation, whereas the introduction of ac4C into these mRNAs increased their translational efficiencies. In addition, our data showed that the distinct gene expression patterns in granulosa cells within arrested secondary follicles were disrupted, and the identity of granulosa cells was altered by Nat10 deletion in oocytes. Taken together, these findings provide evidence that NAT10-mediated ac4C modification is a crucial regulatory factor in the maintenance of oocyte competence and that it constitutes a checkpoint for ovarian folliculogenesis beyond the secondary follicle stage.

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NAT10 inhibition improves cellular phenotypes of Hutchinson-Gilford progeria syndrome by restoring the Transportin-1 pathway

Project description:In this experiment, we aim to examine the role of NAT10 inhibition in Hutchinson-Gilford progeria syndrome (HGPS), a rare but devastating premature ageing syndrome caused by a mutation in the LMNA gene. NAT10 inhibition improves HGPS cellular phenotypes by releasing Transportin-1 (TNPO1) from the cytoplasm, restoring the TNPO1 pathway and allowing hnRNPA1 and NUP153 nuclear import, TPR anchorage at the nuclear pore complexes and RanGTP gradient re-balancing. We have promoted NAT10 inhibition by two ways in normal or patient derived primary skin fibroblasts; the NAT10 inhibitor Remodelin, and an siRNA directly targeting NAT10 (siNAT10). In addition, we have also used an siRNA against TNPO1 and a combined siTNPO1 and siNAT10 treatment. This is a 2-factor design, with treatment (Remodelin vs untreated, or siNAT10 vs siCT) and condition (HGPS vs normal fibroblasts) as the two conditions. Transcriptional profiling was performed using HumanHT-12 v4 Expression BeadChip microarrays, and all conditions were run in triplicate.

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Project description:Targeting NAT10 enhances healthspan and lifespan in a mouse model of human accelerated aging syndrome.

2018-03-22 | E-MTAB-6578 | biostudies-arrayexpress