SMPD4 mediated sphingolipid metabolism regulates brain and primary cilia development
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE250472 | GEO | 2023/12/24
REPOSITORIES: GEO
Similar Datasets
Project description:Purpose: Identification of the miRNA signature carried by the exosomes released from embryonic hippocampal cells under ceramide treatment Outcome: We investigated the role of ceramide in amplifying the differentiation signal of HN9.10 cells. Treatment of HN9.10 cells with ceramide caused the release of exosomes carrying neutral sphingomyelinase and neutral ceramidase. The analysis of exosomal miRNAs showed that 38 miRNAs were differentially expressed in a statistically significant manner, with some overexpressed miRNAs regulating genes encoding for proteins involved in biological, homeostatic, biosynthetic and small molecule metabolic processes, embryo development and cell differentiation, all phenomena that could be relevant for HN9.10 cell differentiation.
2023-07-12 | GSE228052 | GEO
Project description:Background: Whereas cilia damage and reduced cilia beat frequency have been implicated as causative of reduced mucociliary clearance in smokers, theoretically mucociliary clearance could also be affected by cilia length. Based on models of mucociliary clearance predicting cilia length must exceed the 6 -7 μm airway surface fluid depth to generate force in the mucus layer, we hypothesized cilia height may be decreased in airway epithelium of normal smokers compared to nonsmokers. Methodology/Principal Findings: Cilia length in normal nonsmokers and smokers was evaluated in aldehyde-fixed, paraffin-embedded endobronchial biopsies, and air-dried and hydrated samples brushed from human airway epithelium via fiberoptic bronchoscopy. In 28 endobronchial biopsies, healthy smoker cilia length was reduced 15% compared to nonsmokers (p<0.05). In 47 air-dried samples of airway epithelial cells, smoker cilia length was reduced 13% compared to nonsmokers (p<0.0001). Analysis of the length of individual, detached cilia in 17 samples, smoker cilia length was reduced 9% compared to nonsmokers (p<0.05). Finally, in 16 fully hydrated, unfixed samples, smoker cilia length was reduced 7% compared to nonsmokers (p<0.05). Conclusions/significance: Models predict that a reduction in cilia length would reduce mucociliary clearance, suggesting that smoking-associated shorter airway epithelial cilia plays a significant role in the pathogenesis of smoking-induced lung disease.
2012-12-13 | E-GEOD-16696 | biostudies-arrayexpress
Project description:Mutations in CEP290, a large multidomain coiled coil protein, are associated with multiple cilia-associated syndromes. Over 130 CEP290 mutations have been linked to a wide spectrum of human ciliopathies, raising the question of how mutations in a single gene cause different disease syndromes. In zebrafish the expressivity of cep290 deficiencies were linked to the type of genetic ablation: acute cep290 morpholino knockdown caused severe cilia-related phenotypes while defects in a Crispr/Cas9 genetic mutant were restricted to photoreceptor defects. Here we show that milder phenotypes in genetic mutants were associated with upregulation of genes encoding the cilia-associated small GTPases arl3, arl13b, and unc119b. Upregulation of UNC119b was also observed in urine-derived renal epithelial cells from human JBTS CEP290 patients. Ectopic expression of arl3, arl13b and unc119b in cep290 morphant zebrafish embryos rescued Kupffer's vesicle cilia and partially rescued photoreceptor outer segment defects. The results suggest that genetic compensation by upregulation of genes involved in a common subcellular process, lipidated protein trafficking to cilia, may be a conserved mechanism contributing to genotype-phenotype variations observed in CEP290 deficiencies.
2021-05-26 | GSE175491 | GEO
Project description:Defects in cilia genes that is critical in cilia formation and function can cause complicated ciliopathy syndromes involving multiple organs and tissues; however, the underlying regulatory mechanisms of cilia gene networks in ciliopathy are largely unknown. Here, we define the genome-wide redistribution of chromatin accessibilities and extensive divergence of cilia genes expression programs happened in ciliopathy. Mechanistically, the distinct ciliopathy-activated accessible regions (CAAs) are characterized to positively regulate robust changes of flanking cilia genes, which are a key transcriptional feature of cilia required for the response to developmental signals. Moreover, the single transcriptional factors, ETS1, can be recruited to CAAs thus prominently reconstructing chromatin accessibility in ciliopathy. CAAs collapse driven by ETS1 suppression subsequently cause defective cilia formation and impaired developmental signal transduction, which eventually develops ciliopathy phenotypes of short fins and pericardium edema in larval fishes. Therefore, our results depicted a dynamic landscape of chromatin accessibility in ciliopathy, and uncover an insightful role of ETS1 in controlling global cilia genes transcriptional program by reprogramming widespread chromatin state.
2023-04-26 | GSE230552 | GEO
Project description:Defects in cilia genes that is critical in cilia formation and function can cause complicated ciliopathy syndromes involving multiple organs and tissues; however, the underlying regulatory mechanisms of cilia gene networks in ciliopathy are largely unknown. Here, we define the genome-wide redistribution of chromatin accessibilities and extensive divergence of cilia genes expression programs happened in ciliopathy. Mechanistically, the distinct ciliopathy-activated accessible regions (CAAs) are characterized to positively regulate robust changes of flanking cilia genes, which are a key transcriptional feature of cilia required for the response to developmental signals. Moreover, the single transcriptional factors, ETS1, can be recruited to CAAs thus prominently reconstructing chromatin accessibility in ciliopathy. CAAs collapse driven by ETS1 suppression subsequently cause defective cilia formation and impaired developmental signal transduction, which eventually develops ciliopathy phenotypes of short fins and pericardium edema in larval fishes. Therefore, our results depicted a dynamic landscape of chromatin accessibility in ciliopathy, and uncover an insightful role of ETS1 in controlling global cilia genes transcriptional program by reprogramming widespread chromatin state.
2022-07-28 | GSE209661 | GEO
Project description:Defects in cilia genes that is critical in cilia formation and function can cause complicated ciliopathy syndromes involving multiple organs and tissues; however, the underlying regulatory mechanisms of cilia gene networks in ciliopathy are largely unknown. Here, we define the genome-wide redistribution of chromatin accessibilities and extensive divergence of cilia genes expression programs happened in ciliopathy. Mechanistically, the distinct ciliopathy-activated accessible regions (CAAs) are characterized to positively regulate robust changes of flanking cilia genes, which are a key transcriptional feature of cilia required for the response to developmental signals. Moreover, the single transcriptional factors, ETS1, can be recruited to CAAs thus prominently reconstructing chromatin accessibility in ciliopathy. CAAs collapse driven by ETS1 suppression subsequently cause defective cilia formation and impaired developmental signal transduction, which eventually develops ciliopathy phenotypes of short fins and pericardium edema in larval fishes. Therefore, our results depicted a dynamic landscape of chromatin accessibility in ciliopathy, and uncover an insightful role of ETS1 in controlling global cilia genes transcriptional program by reprogramming widespread chromatin state.
2022-07-28 | GSE209660 | GEO
Project description:Defects in cilia genes that is critical in cilia formation and function can cause complicated ciliopathy syndromes involving multiple organs and tissues; however, the underlying regulatory mechanisms of cilia gene networks in ciliopathy are largely unknown. Here, we define the genome-wide redistribution of chromatin accessibilities and extensive divergence of cilia genes expression programs happened in ciliopathy. Mechanistically, the distinct ciliopathy-activated accessible regions (CAAs) are characterized to positively regulate robust changes of flanking cilia genes, which are a key transcriptional feature of cilia required for the response to developmental signals. Moreover, the single transcriptional factors, ETS1, can be recruited to CAAs thus prominently reconstructing chromatin accessibility in ciliopathy. CAAs collapse driven by ETS1 suppression subsequently cause defective cilia formation and impaired developmental signal transduction, which eventually develops ciliopathy phenotypes of short fins and pericardium edema in larval fishes. Therefore, our results depicted a dynamic landscape of chromatin accessibility in ciliopathy, and uncover an insightful role of ETS1 in controlling global cilia genes transcriptional program by reprogramming widespread chromatin state.
2022-07-28 | GSE209659 | GEO
Project description:Background: Whereas cilia damage and reduced cilia beat frequency have been implicated as causative of reduced mucociliary clearance in smokers, theoretically mucociliary clearance could also be affected by cilia length. Based on models of mucociliary clearance predicting cilia length must exceed the 6 -7 μm airway surface fluid depth to generate force in the mucus layer, we hypothesized cilia height may be decreased in airway epithelium of normal smokers compared to nonsmokers. Methodology/Principal Findings: Cilia length in normal nonsmokers and smokers was evaluated in aldehyde-fixed, paraffin-embedded endobronchial biopsies, and air-dried and hydrated samples brushed from human airway epithelium via fiberoptic bronchoscopy. In 28 endobronchial biopsies, healthy smoker cilia length was reduced 15% compared to nonsmokers (p<0.05). In 47 air-dried samples of airway epithelial cells, smoker cilia length was reduced 13% compared to nonsmokers (p<0.0001). Analysis of the length of individual, detached cilia in 17 samples, smoker cilia length was reduced 9% compared to nonsmokers (p<0.05). Finally, in 16 fully hydrated, unfixed samples, smoker cilia length was reduced 7% compared to nonsmokers (p<0.05).
2012-12-13 | GSE16696 | GEO
Project description:Analysis of epithelial explants injected with the intracellular domain of Notch (ICD) to block the formation of multi-ciliate cells, either alone or along with FoxJ1. FoxJ1 misexpression leads to the induction fo ectopic cilia in Xenopus laevis epithelia. Results show which genes are affected by FoxJ1 during the induction of ectopic cilia. Ciliated cells that produce a leftward fluid flow have been proposed to mediate left-right patterning in many vertebrate embryos. These cilia combine features of primary sensory and motile cilia, but how such cilia are specified is unknown. We address this issue by analyzing the Xenopus and Zebrafish homologs of FoxJ1, a forkhead transcription factor necessary for ciliogenesis in multi-ciliate cells of the mouse. We show that the cilia that underlie left-right patterning on the Xenopus gastrocoel roof plate (GRP) and Zebrafish Kupffer’s vesicle (KV) are severely shortened or fail to form in FoxJ1 morphants. We also show that misexpressing XFoxJ1 is sufficient to induce ectopic GRP-like cilia formation in frog embryos. Microarray analysis indicates that XFoxJ1 induces the formation of cilia by upregulating the expression of motile cilia genes. These results indicate that FoxJ1 is a critical determinant in specifying cilia used in left-right patterning. Keywords: Cilia Induction
2008-09-15 | GSE12613 | GEO