ATAC-seq profile of mouse palatal epithelium at E14.5
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA587709 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR10401751_1.fastq.gz | Fastqsanger.gz | |||
| SRR10401751_2.fastq.gz | Fastqsanger.gz | |||
| SRR10401752_1.fastq.gz | Fastqsanger.gz | |||
| SRR10401752_2.fastq.gz | Fastqsanger.gz | |||
| SRR10401753_1.fastq.gz | Fastqsanger.gz |
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Project description:We identify a role for two evolutionarily related, secreted metalloproteases of the ADAMTS family (A disintegrin-like and metalloprotease domain with thrombospondin type-1 motif), ADAMTS20 and ADAMTS9, in palatogenesis. Adamts20 mutations cause the mouse white spotting mutant belted (bt), whereas Adamts9 is essential for survival beyond 7.5 days of gestation (E7.5). Functional overlap of Adamts9 with Adamts20 was established in bt/bt:Adamts9+/- mice, which have increased white spotting relative to bt mice, as previously reported, and a fully penetrant cleft palate. Palatal closure was delayed, although eventually completed, in both bt/+;Adamts9+/- and bt/bt mice, demonstrating a cooperative role of these related genes. Adamts9 and Adamts20 are both expressed in palatal mesenchyme, with Adamts9 expressed exclusively in microvascular endothelial cells. Palatal shelves from bt/bt:Adamts9+/- mice fused in culture, suggesting an intact TGF signaling pathway in palatal epithelium, and indicating a temporally specific delay in palatal shelf elevation and growth toward the midline. Palatal shelf mesenchymal cells showed a statistically significant decrease of cell proliferation at E13.5 and E14.5, as well as decreased processing of versican, an ADAMTS substrate, at these stages. Vcan haploinsufficiency led to a greater penetrance of cleft palate in bt mice, and impaired proliferation was also seen in palatal mesenchymal cells of these mice, suggesting a role for ADAMTS-mediated versican proteolysis in palatal closure. In a parallel with recent work identifying a role for a bioactive ADAMTS-generated versican fragment in regulating apoptosis during interdigital web regression, we propose that versican proteolysis may influence palatal mesenchymal cell proliferation. Palatal shelves were dissected from four E13.75 Adamts9+/-:bt/bt embyos (correspond to the 4 samples: Palate_Adamts9+/-:bt/bt_Rep1, Palate_Adamts9+/-:bt/bt_Rep2, Palate_Adamts9+/-:bt/bt_Rep3 and Palate_Adamts9+/-:bt/bt_Rep4) and age-matched 3 wild-type C57Bl/6 embryos (correspond to the 3 samples: Palate_WT_Rep1, Palate_WT_Rep2, and Palate_WT_Rep3) that were used as the controls
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Project description:We identify a role for two evolutionarily related, secreted metalloproteases of the ADAMTS family (A disintegrin-like and metalloprotease domain with thrombospondin type-1 motif), ADAMTS20 and ADAMTS9, in palatogenesis. Adamts20 mutations cause the mouse white spotting mutant belted (bt), whereas Adamts9 is essential for survival beyond 7.5 days of gestation (E7.5). Functional overlap of Adamts9 with Adamts20 was established in bt/bt:Adamts9+/- mice, which have increased white spotting relative to bt mice, as previously reported, and a fully penetrant cleft palate. Palatal closure was delayed, although eventually completed, in both bt/+;Adamts9+/- and bt/bt mice, demonstrating a cooperative role of these related genes. Adamts9 and Adamts20 are both expressed in palatal mesenchyme, with Adamts9 expressed exclusively in microvascular endothelial cells. Palatal shelves from bt/bt:Adamts9+/- mice fused in culture, suggesting an intact TGFbeta signaling pathway in palatal epithelium, and indicating a temporally specific delay in palatal shelf elevation and growth toward the midline. Palatal shelf mesenchymal cells showed a statistically significant decrease of cell proliferation at E13.5 and E14.5, as well as decreased processing of versican, an ADAMTS substrate, at these stages. Vcan haploinsufficiency led to a greater penetrance of cleft palate in bt mice, and impaired proliferation was also seen in palatal mesenchymal cells of these mice, suggesting a role for ADAMTS-mediated versican proteolysis in palatal closure. In a parallel with recent work identifying a role for a bioactive ADAMTS-generated versican fragment in regulating apoptosis during interdigital web regression, we propose that versican proteolysis may influence palatal mesenchymal cell proliferation.
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Project description:This study is the first to investigate the process of osteoclast differentiation, its potential functions, and the associated mRNA and signaling pathway during embryonic palatal bone. Our findings suggest that osteoclasts may be involved in bone remodeling, bone marrow cavity formation, and blood vessel formation in embryonic palatal bone. We observed Trap-positive osteoclasts at E16.5, E17.5, and E18.5 at the palatal process of the palate (PPP), Posterior and anterior part of the palatal process of the maxilla (PPMXP, and PPMXA), respectively, with osteoclast differentiation starting 2 days prior to TRAP positivity. By comparing the key periods of osteoclast differentiation between PPMX and PPP (E14.5, E15.5, and E16.5) using RNA-seq data of the palates, we found that the PI3K-AKT and MAPK signaling pathways were sequentially enriched, which may play critical roles in osteoclast survival and differentiation. Csf1r, Tnfrsff11a, Ctsk, Fos, Tyrobp, Fcgr3, and Spi1 were significantly upregulated in both PPMX and PPP, while Pik3r3, Tgfbr1, and Mapk3k7 were significantly downregulated in both. Interestingly, Tnfrsff11b was upregulated in PPMX but downregulated in PPP, which may regulate the timing of osteoclast appearance. These results contribute to the limited knowledge regarding mRNA specific steps in OLCs differentiation in the embryonic palatal bone.
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Project description:The overall goal of this project is to investigate the role of TGF-beta signaling in epithelial cells as it pertains to the orientation of muscle fibers in the soft palate during embryogenesis. Here, we first conducted gene expression profiling of the anterior and posterior portions of the palate from wild-type mice. In addition, we also conducted gene expression profiling of the posterior palate in mutant mice with an epithelium-specific conditional inactivation of the Tgfbr2 gene. The latter mice provide a model of submucosal cleft palate, which is a congenital birth defect commonly observed in many syndromic conditions. To investigate the adverse effects of dysfunctional TGF-Beta signaling on tissue-tissue interaction between the palatal epithelium and myofibers during palatogenesis, we analyzed mice with an epithelial cell-specific conditional inactivation of Tgfbr2 (Tgfbr2fl/fl;K14-Cre). We performed microarray analyses of anterior palatal tissue and posterior palatal tissue of E15.5 Tgfbr2fl/fl control mice (n=5, each region), and posterior palatal tissue of Tgfbr2fl/fl;K14-Cre mutant mice, collected at embryonic day 15.5 (n=5). Control samples and mutant samples are from separate litters.
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